options.c

   1 /*
   2  * Command-line (and received via daemon-socket) option parsing.
   3  *
   4  * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
   5  * Copyright (C) 2000, 2001, 2002 Martin Pool <mbp@samba.org>
   6  * Copyright (C) 2002-2020 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "itypes.h"
  24 #include "ifuncs.h"
  25 #include "latest-year.h"
  26 #include "git-version.h"
  27 #include <popt.h>
  28
  29 extern int module_id;
  30 extern int local_server;
  31 extern int sanitize_paths;
  32 extern unsigned int module_dirlen;
  33 extern struct name_num_obj valid_checksums;
  34 extern struct name_num_obj valid_compressions;
  35 extern filter_rule_list filter_list;
  36 extern filter_rule_list daemon_filter_list;
  37
  38 int make_backups = 0;
  39
  40 /**
  41  * If 1, send the whole file as literal data rather than trying to
  42  * create an incremental diff.
  43  *
  44  * If -1, then look at whether we're local or remote and go by that.
  45  *
  46  * @sa disable_deltas_p()
  47  **/
  48 int whole_file = -1;
  49
  50 int append_mode = 0;
  51 int keep_dirlinks = 0;
  52 int copy_dirlinks = 0;
  53 int copy_links = 0;
  54 int write_devices = 0;
  55 int preserve_links = 0;
  56 int preserve_hard_links = 0;
  57 int preserve_acls = 0;
  58 int preserve_xattrs = 0;
  59 int preserve_perms = 0;
  60 int preserve_executability = 0;
  61 int preserve_devices = 0;
  62 int preserve_specials = 0;
  63 int preserve_uid = 0;
  64 int preserve_gid = 0;
  65 int preserve_times = 0;
  66 int preserve_atimes = 0;
  67 int preserve_crtimes = 0;
  68 int update_only = 0;
  69 int open_noatime = 0;
  70 int cvs_exclude = 0;
  71 int dry_run = 0;
  72 int do_xfers = 1;
  73 int ignore_times = 0;
  74 int delete_mode = 0;
  75 int delete_during = 0;
  76 int delete_before = 0;
  77 int delete_after = 0;
  78 int delete_excluded = 0;
  79 int remove_source_files = 0;
  80 int one_file_system = 0;
  81 int protocol_version = PROTOCOL_VERSION;
  82 int sparse_files = 0;
  83 int preallocate_files = 0;
  84 int do_compression = 0;
  85 int do_compression_level = CLVL_NOT_SPECIFIED;
  86 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  87 int am_server = 0;
  88 int am_sender = 0;
  89 int am_starting_up = 1;
  90 int relative_paths = -1;
  91 int implied_dirs = 1;
  92 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  93 int numeric_ids = 0;
  94 int msgs2stderr = 2; /* Default: send errors to stderr for local & remote-shell transfers */
  95 int allow_8bit_chars = 0;
  96 int force_delete = 0;
  97 int io_timeout = 0;
  98 int prune_empty_dirs = 0;
  99 int use_qsort = 0;
 100 char *files_from = NULL;
 101 int filesfrom_fd = -1;
 102 char *filesfrom_host = NULL;
 103 int eol_nulls = 0;
 104 int protect_args = -1;
 105 int human_readable = 1;
 106 int recurse = 0;
 107 int mkpath_dest_arg = 0;
 108 int allow_inc_recurse = 1;
 109 int xfer_dirs = -1;
 110 int am_daemon = 0;
 111 int connect_timeout = 0;
 112 int keep_partial = 0;
 113 int safe_symlinks = 0;
 114 int copy_unsafe_links = 0;
 115 int munge_symlinks = 0;
 116 int size_only = 0;
 117 int daemon_bwlimit = 0;
 118 int bwlimit = 0;
 119 int fuzzy_basis = 0;
 120 size_t bwlimit_writemax = 0;
 121 int ignore_existing = 0;
 122 int ignore_non_existing = 0;
 123 int need_messages_from_generator = 0;
 124 int max_delete = INT_MIN;
 125 OFF_T max_size = -1;
 126 OFF_T min_size = -1;
 127 int ignore_errors = 0;
 128 int modify_window = 0;
 129 int blocking_io = -1;
 130 int checksum_seed = 0;
 131 int inplace = 0;
 132 int delay_updates = 0;
 133 int32 block_size = 0;
 134 time_t stop_at_utime = 0;
 135 char *skip_compress = NULL;
 136 char *copy_as = NULL;
 137 item_list dparam_list = EMPTY_ITEM_LIST;
 138
 139 /** Network address family. **/
 140 int default_af_hint
 141 #ifdef INET6
 142         = 0;            /* Any protocol */
 143 #else
 144         = AF_INET;      /* Must use IPv4 */
 145 # ifdef AF_INET6
 146 #  undef AF_INET6
 147 # endif
 148 # define AF_INET6 AF_INET /* make -6 option a no-op */
 149 #endif
 150
 151 /** Do not go into the background when run as --daemon.  Good
 152  * for debugging and required for running as a service on W32,
 153  * or under Unix process-monitors. **/
 154 int no_detach
 155 #if defined _WIN32 || defined __WIN32__
 156         = 1;
 157 #else
 158         = 0;
 159 #endif
 160
 161 int write_batch = 0;
 162 int read_batch = 0;
 163 int backup_dir_len = 0;
 164 int backup_suffix_len;
 165 unsigned int backup_dir_remainder;
 166
 167 char *backup_suffix = NULL;
 168 char *tmpdir = NULL;
 169 char *partial_dir = NULL;
 170 char *basis_dir[MAX_BASIS_DIRS+1];
 171 char *config_file = NULL;
 172 char *shell_cmd = NULL;
 173 char *logfile_name = NULL;
 174 char *logfile_format = NULL;
 175 char *stdout_format = NULL;
 176 char *password_file = NULL;
 177 char *early_input_file = NULL;
 178 char *rsync_path = RSYNC_PATH;
 179 char *backup_dir = NULL;
 180 char backup_dir_buf[MAXPATHLEN];
 181 char *sockopts = NULL;
 182 char *usermap = NULL;
 183 char *groupmap = NULL;
 184 int rsync_port = 0;
 185 int alt_dest_type = 0;
 186 int basis_dir_cnt = 0;
 187
 188 #define DEFAULT_MAX_ALLOC (1024L * 1024 * 1024)
 189 size_t max_alloc = DEFAULT_MAX_ALLOC;
 190 char *max_alloc_arg;
 191
 192 static int version_opt_cnt = 0;
 193 static int remote_option_alloc = 0;
 194 int remote_option_cnt = 0;
 195 const char **remote_options = NULL;
 196 const char *checksum_choice = NULL;
 197 const char *compress_choice = NULL;
 198
 199 #ifndef __APPLE__ /* Do we need a configure check for this? */
 200 #define SUPPORT_ATIMES 1
 201 #endif
 202
 203 int quiet = 0;
 204 int output_motd = 1;
 205 int log_before_transfer = 0;
 206 int stdout_format_has_i = 0;
 207 int stdout_format_has_o_or_i = 0;
 208 int logfile_format_has_i = 0;
 209 int logfile_format_has_o_or_i = 0;
 210 int always_checksum = 0;
 211 int list_only = 0;
 212
 213 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 214 char *batch_name = NULL;
 215
 216 int need_unsorted_flist = 0;
 217 char *iconv_opt =
 218 #ifdef ICONV_OPTION
 219                 ICONV_OPTION;
 220 #else
 221                 NULL;
 222 #endif
 223
 224 struct chmod_mode_struct *chmod_modes = NULL;
 225
 226 static const char *debug_verbosity[] = {
 227         /*0*/ NULL,
 228         /*1*/ NULL,
 229         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 230         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 231         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 232         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 233 };
 234
 235 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 236
 237 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 238         /*0*/ NULL,
 239         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 240         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 241 };
 242
 243 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 244
 245 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 246
 247 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 248 #define HELP_PRIORITY 1         /* The help output uses this level. */
 249 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 250 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 251
 252 #define W_CLI (1<<0)    /* client side */
 253 #define W_SRV (1<<1)    /* server side */
 254 #define W_SND (1<<2)    /* sending side */
 255 #define W_REC (1<<3)    /* receiving side */
 256
 257 struct output_struct {
 258         char *name;     /* The name of the info/debug flag. */
 259         char *help;     /* The description of the info/debug flag. */
 260         uchar namelen;  /* The length of the name string. */
 261         uchar flag;     /* The flag's value, for consistency check. */
 262         uchar where;    /* Bits indicating where the flag is used. */
 263         uchar priority; /* See *_PRIORITY defines. */
 264 };
 265
 266 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 267
 268 static struct output_struct info_words[COUNT_INFO+1] = {
 269         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 270         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 271         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 272         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 273         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 274         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 275         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 276         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 277         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 278         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 279         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 280         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 281         { NULL, "--info", 0, 0, 0, 0 }
 282 };
 283
 284 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 285
 286 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 287         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 288         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 289         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 290         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 291         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 292         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 293         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 294         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 295         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 296         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 297         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 298         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 299         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 300         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 301         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 302         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 303         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 304         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 305         DEBUG_WORD(NSTR, W_CLI|W_SRV, "Debug negotiation strings"),
 306         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 307         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 308         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 309         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 310         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 311         { NULL, "--debug", 0, 0, 0, 0 }
 312 };
 313
 314 static int verbose = 0;
 315 static int do_stats = 0;
 316 static int do_progress = 0;
 317 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 318 static int omit_dir_times = 0;
 319 static int omit_link_times = 0;
 320 static int F_option_cnt = 0;
 321 static int modify_window_set;
 322 static int itemize_changes = 0;
 323 static int refused_delete, refused_archive_part, refused_compress;
 324 static int refused_partial, refused_progress, refused_delete_before;
 325 static int refused_delete_during;
 326 static int refused_inplace, refused_no_iconv;
 327 static BOOL usermap_via_chown, groupmap_via_chown;
 328 static char *outbuf_mode;
 329 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 330 static char tmp_partialdir[] = ".~tmp~";
 331
 332 /** Local address to bind.  As a character string because it's
 333  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 334  * address, or a hostname. **/
 335 char *bind_address;
 336
 337 static void output_item_help(struct output_struct *words);
 338
 339 /* This constructs a string that represents all the options set for either
 340  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 341  * This is used both when conveying the user's options to the server, and
 342  * when the help output wants to tell the user what options are implied. */
 343 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 344 {
 345         char *str = words == info_words ? "--info=" : "--debug=";
 346         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 347         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 348         char *buf;
 349
 350         memset(counts, 0, sizeof counts);
 351
 352         for (j = 0; words[j].name; j++) {
 353                 if (words[j].flag != j) {
 354                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 355                                 words == info_words ? "INFO_" : "DEBUG_",
 356                                 words[j].name, words[j].flag, j);
 357                         exit_cleanup(RERR_UNSUPPORTED);
 358                 }
 359                 if (!(words[j].where & where))
 360                         continue;
 361                 if (words[j].priority == DEFAULT_PRIORITY) {
 362                         /* Implied items don't need to be mentioned. */
 363                         skipped++;
 364                         continue;
 365                 }
 366                 len += len ? 1 : strlen(str);
 367                 len += strlen(words[j].name);
 368                 len += levels[j] == 1 ? 0 : 1;
 369
 370                 if (words[j].priority == HELP_PRIORITY)
 371                         continue; /* no abbreviating for help */
 372
 373                 assert(levels[j] <= MAX_OUT_LEVEL);
 374                 if (++counts[levels[j]] > max) {
 375                         /* Determine which level has the most items. */
 376                         lev = levels[j];
 377                         max = counts[lev];
 378                 }
 379         }
 380
 381         /* Sanity check the COUNT_* define against the length of the table. */
 382         if (j != word_count) {
 383                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 384                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 385                         j, word_count);
 386                 exit_cleanup(RERR_UNSUPPORTED);
 387         }
 388
 389         if (!len)
 390                 return NULL;
 391
 392         len++;
 393         buf = new_array(char, len);
 394         pos = 0;
 395
 396         if (skipped || max < 5)
 397                 lev = -1;
 398         else {
 399                 if (lev == 0)
 400                         pos += snprintf(buf, len, "%sNONE", str);
 401                 else if (lev == 1)
 402                         pos += snprintf(buf, len, "%sALL", str);
 403                 else
 404                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 405         }
 406
 407         for (j = 0; words[j].name && pos < len; j++) {
 408                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 409                         continue;
 410                 if (pos)
 411                         buf[pos++] = ',';
 412                 else
 413                         pos += strlcpy(buf+pos, str, len-pos);
 414                 if (pos < len)
 415                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 416                 /* Level 1 is implied by the name alone. */
 417                 if (levels[j] != 1 && pos < len)
 418                         buf[pos++] = '0' + levels[j];
 419         }
 420
 421         buf[pos] = '\0';
 422
 423         return buf;
 424 }
 425
 426 static void parse_output_words(struct output_struct *words, short *levels, const char *str, uchar priority)
 427 {
 428         const char *s;
 429         int j, len, lev;
 430
 431         for ( ; str; str = s) {
 432                 if ((s = strchr(str, ',')) != NULL)
 433                         len = s++ - str;
 434                 else
 435                         len = strlen(str);
 436                 if (!len)
 437                         continue;
 438                 if (!isDigit(str)) {
 439                         while (len && isDigit(str+len-1))
 440                                 len--;
 441                 }
 442                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 443                 if (lev > MAX_OUT_LEVEL)
 444                         lev = MAX_OUT_LEVEL;
 445                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 446                         output_item_help(words);
 447                         exit_cleanup(0);
 448                 }
 449                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 450                         len = lev = 0;
 451                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 452                         len = 0;
 453                 for (j = 0; words[j].name; j++) {
 454                         if (!len
 455                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 456                                 if (priority >= words[j].priority) {
 457                                         words[j].priority = priority;
 458                                         levels[j] = lev;
 459                                 }
 460                                 if (len)
 461                                         break;
 462                         }
 463                 }
 464                 if (len && !words[j].name && !am_server) {
 465                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 466                                 words[j].help, len, str);
 467                         exit_cleanup(RERR_SYNTAX);
 468                 }
 469         }
 470 }
 471
 472 /* Tell the user what all the info or debug flags mean. */
 473 static void output_item_help(struct output_struct *words)
 474 {
 475         short *levels = words == info_words ? info_levels : debug_levels;
 476         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 477         char buf[128], *opt, *fmt = "%-10s %s\n";
 478         int j;
 479
 480         reset_output_levels();
 481
 482         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 483         rprintf(FINFO, "\n");
 484         for (j = 0; words[j].name; j++)
 485                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 486         rprintf(FINFO, "\n");
 487
 488         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 489                  words[j].help, MAX_OUT_LEVEL);
 490         rprintf(FINFO, fmt, "ALL", buf);
 491
 492         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 493                  words[j].help);
 494         rprintf(FINFO, fmt, "NONE", buf);
 495
 496         rprintf(FINFO, fmt, "HELP", "Output this help message");
 497         rprintf(FINFO, "\n");
 498         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 499
 500         for (j = 1; j <= MAX_VERBOSITY; j++) {
 501                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 502                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 503                 if (opt) {
 504                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 505                         free(opt);
 506                 }
 507                 reset_output_levels();
 508         }
 509 }
 510
 511 /* The --verbose option now sets info+debug flags. */
 512 static void set_output_verbosity(int level, uchar priority)
 513 {
 514         int j;
 515
 516         if (level > MAX_VERBOSITY)
 517                 level = MAX_VERBOSITY;
 518
 519         for (j = 1; j <= level; j++) {
 520                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 521                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 522         }
 523 }
 524
 525 /* Limit the info+debug flag levels given a verbose-option level limit. */
 526 void limit_output_verbosity(int level)
 527 {
 528         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 529         int j;
 530
 531         if (level > MAX_VERBOSITY)
 532                 return;
 533
 534         memset(info_limits, 0, sizeof info_limits);
 535         memset(debug_limits, 0, sizeof debug_limits);
 536
 537         /* Compute the level limits in the above arrays. */
 538         for (j = 1; j <= level; j++) {
 539                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 540                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 541         }
 542
 543         for (j = 0; j < COUNT_INFO; j++) {
 544                 if (info_levels[j] > info_limits[j])
 545                         info_levels[j] = info_limits[j];
 546         }
 547
 548         for (j = 0; j < COUNT_DEBUG; j++) {
 549                 if (debug_levels[j] > debug_limits[j])
 550                         debug_levels[j] = debug_limits[j];
 551         }
 552 }
 553
 554 void reset_output_levels(void)
 555 {
 556         int j;
 557
 558         memset(info_levels, 0, sizeof info_levels);
 559         memset(debug_levels, 0, sizeof debug_levels);
 560
 561         for (j = 0; j < COUNT_INFO; j++)
 562                 info_words[j].priority = DEFAULT_PRIORITY;
 563
 564         for (j = 0; j < COUNT_DEBUG; j++)
 565                 debug_words[j].priority = DEFAULT_PRIORITY;
 566 }
 567
 568 void negate_output_levels(void)
 569 {
 570         int j;
 571
 572         for (j = 0; j < COUNT_INFO; j++)
 573                 info_levels[j] *= -1;
 574
 575         for (j = 0; j < COUNT_DEBUG; j++)
 576                 debug_levels[j] *= -1;
 577 }
 578
 579 static char *istring(const char *fmt, int val)
 580 {
 581         char *str;
 582         if (asprintf(&str, fmt, val) < 0)
 583                 out_of_memory("istring");
 584         return str;
 585 }
 586
 587 static void print_info_flags(enum logcode f)
 588 {
 589         STRUCT_STAT *dumstat;
 590         char line_buf[75];
 591         int line_len, j;
 592         char *info_flags[] = {
 593
 594         "*Capabilities",
 595
 596                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
 597                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
 598                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
 599                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
 600
 601 #ifndef HAVE_SOCKETPAIR
 602                 "no "
 603 #endif
 604                         "socketpairs",
 605
 606 #ifndef SUPPORT_HARD_LINKS
 607                 "no "
 608 #endif
 609                         "hardlinks",
 610
 611 #ifndef CAN_HARDLINK_SPECIAL
 612                 "no "
 613 #endif
 614                         "hardlink-specials",
 615
 616 #ifndef SUPPORT_LINKS
 617                 "no "
 618 #endif
 619                         "symlinks",
 620
 621 #ifndef INET6
 622                 "no "
 623 #endif
 624                         "IPv6",
 625
 626 #ifndef SUPPORT_ATIMES
 627                 "no "
 628 #endif
 629                         "atimes",
 630
 631                 "batchfiles",
 632
 633 #ifndef HAVE_FTRUNCATE
 634                 "no "
 635 #endif
 636                         "inplace",
 637
 638 #ifndef HAVE_FTRUNCATE
 639                 "no "
 640 #endif
 641                         "append",
 642
 643 #ifndef SUPPORT_ACLS
 644                 "no "
 645 #endif
 646                         "ACLs",
 647
 648 #ifndef SUPPORT_XATTRS
 649                 "no "
 650 #endif
 651                         "xattrs",
 652
 653 #ifdef RSYNC_USE_PROTECTED_ARGS
 654                 "default "
 655 #else
 656                 "optional "
 657 #endif
 658                         "protect-args",
 659
 660 #ifndef ICONV_OPTION
 661                 "no "
 662 #endif
 663                         "iconv",
 664
 665 #ifndef CAN_SET_SYMLINK_TIMES
 666                 "no "
 667 #endif
 668                         "symtimes",
 669
 670 #ifndef SUPPORT_PREALLOCATION
 671                 "no "
 672 #endif
 673                         "prealloc",
 674
 675 #ifndef HAVE_MKTIME
 676                 "no "
 677 #endif
 678                         "stop-at",
 679
 680 #ifndef SUPPORT_CRTIMES
 681                 "no "
 682 #endif
 683                         "crtimes",
 684
 685         "*Optimizations",
 686
 687 #ifndef HAVE_SIMD
 688                 "no "
 689 #endif
 690                         "SIMD",
 691
 692 #ifndef HAVE_ASM
 693                 "no "
 694 #endif
 695                         "asm",
 696
 697 #ifndef USE_OPENSSL
 698                 "no "
 699 #endif
 700                         "openssl-crypto",
 701
 702                 NULL
 703         };
 704
 705         for (line_len = 0, j = 0; ; j++) {
 706                 char *str = info_flags[j], *next_nfo = str ? info_flags[j+1] : NULL;
 707                 int str_len = str && *str != '*' ? strlen(str) : 1000;
 708                 int need_comma = next_nfo && *next_nfo != '*' ? 1 : 0;
 709                 if (line_len && line_len + 1 + str_len + need_comma >= (int)sizeof line_buf) {
 710                         rprintf(f, "   %s\n", line_buf);
 711                         line_len = 0;
 712                 }
 713                 if (!str)
 714                         break;
 715                 if (*str == '*') {
 716                         rprintf(f, "%s:\n", str+1);
 717                         continue;
 718                 }
 719                 line_len += snprintf(line_buf+line_len, sizeof line_buf - line_len, " %s%s", str, need_comma ? "," : "");
 720         }
 721 }
 722
 723 static void print_rsync_version(enum logcode f)
 724 {
 725         char tmpbuf[256], *subprotocol = "";
 726
 727 #if SUBPROTOCOL_VERSION != 0
 728         subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
 729 #endif
 730         rprintf(f, "%s  version %s  protocol version %d%s\n",
 731                 RSYNC_NAME, RSYNC_GITVER, PROTOCOL_VERSION, subprotocol);
 732
 733         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 734         rprintf(f, "Web site: https://rsync.samba.org/\n");
 735
 736         print_info_flags(f);
 737
 738         rprintf(f, "Checksum list:\n");
 739         get_default_nno_list(&valid_checksums, tmpbuf, sizeof tmpbuf, '(');
 740         rprintf(f, "    %s\n", tmpbuf);
 741
 742         rprintf(f, "Compress list:\n");
 743         get_default_nno_list(&valid_compressions, tmpbuf, sizeof tmpbuf, '(');
 744         rprintf(f, "    %s\n", tmpbuf);
 745
 746 #ifdef MAINTAINER_MODE
 747         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 748 #endif
 749
 750 #if SIZEOF_INT64 < 8
 751         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 752 #endif
 753         if (sizeof (int64) != SIZEOF_INT64) {
 754                 rprintf(f,
 755                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 756                         (int) SIZEOF_INT64, (int) sizeof (int64));
 757         }
 758
 759         rprintf(f,"\n");
 760         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 761         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 762         rprintf(f,"General Public Licence for details.\n");
 763 }
 764
 765
 766 void usage(enum logcode F)
 767 {
 768   print_rsync_version(F);
 769
 770   rprintf(F,"\n");
 771   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 772   rprintf(F,"via a fast differencing algorithm.\n");
 773
 774   rprintf(F,"\n");
 775   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 776   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 777   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 778   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 779   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 780   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 781   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 782   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 783   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 784   rprintf(F,"\n");
 785   rprintf(F,"Options\n");
 786 #include "help-rsync.h"
 787   rprintf(F,"\n");
 788   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 789   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 790   rprintf(F,"See https://rsync.samba.org/ for updates, bug reports, and answers\n");
 791 }
 792
 793 enum {OPT_SERVER = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 794       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 795       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 796       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 797       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG, OPT_BLOCK_SIZE,
 798       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT, OPT_STDERR,
 799       OPT_OLD_COMPRESS, OPT_NEW_COMPRESS, OPT_NO_COMPRESS,
 800       OPT_STOP_AFTER, OPT_STOP_AT,
 801       OPT_REFUSED_BASE = 9000};
 802
 803 static struct poptOption long_options[] = {
 804   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 805   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 806   {"version",         'V', POPT_ARG_NONE,   0, 'V', 0, 0},
 807   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 808   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 809   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 810   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 811   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 812   {"stderr",           0,  POPT_ARG_STRING, 0, OPT_STDERR, 0, 0 },
 813   {"msgs2stderr",      0,  POPT_ARG_VAL,    &msgs2stderr, 1, 0, 0 },
 814   {"no-msgs2stderr",   0,  POPT_ARG_VAL,    &msgs2stderr, 0, 0, 0 },
 815   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 816   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 817   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 818   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 819   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 820   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 821   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 822   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 823   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 824   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 825   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 826   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 827   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 828   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 829   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 830   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 831   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 832   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 833   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 834   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 835   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 836   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 837   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 838   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 839   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 840   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 841   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 842   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 843   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 844   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 845   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 846   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 847   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 848   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 849   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
 850   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 851   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 852   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
 853   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
 854   {"crtimes",         'N', POPT_ARG_VAL,    &preserve_crtimes, 1, 0, 0 },
 855   {"no-crtimes",       0,  POPT_ARG_VAL,    &preserve_crtimes, 0, 0, 0 },
 856   {"no-N",             0,  POPT_ARG_VAL,    &preserve_crtimes, 0, 0, 0 },
 857   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 858   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 859   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 860   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 861   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 862   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 863   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 864   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 865   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 866   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 867   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 868   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 869   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 870   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 871   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 872   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 873   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 874   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 875   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 876   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 877   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 878   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 879   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 880   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 881   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 882   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 883   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 884   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 885   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 886   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 887   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 888   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 889   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 890   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 891   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 892   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 893   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 894   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 895   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 896   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 897   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 898   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 899   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 900   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 901   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 902   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 903   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 904   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 905   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 906   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 907   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 908   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 909   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 910   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 911   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 912   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 913   {"max-alloc",        0,  POPT_ARG_STRING, &max_alloc_arg, 0, 0, 0 },
 914   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 915   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 916   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 917   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 918   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 919   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 920   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 921   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 922   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 923   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 924   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 925   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 926   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 927   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 928   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 929   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 930   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 931   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 932   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 933   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 934   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 935   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 936   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 937   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 938   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 939   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 940   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 941   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 942   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 943   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 944   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 945   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 946   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 947   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 948   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 949   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 950   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 951   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 952   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 953   {"cc",               0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 954   {"block-size",      'B', POPT_ARG_STRING, 0, OPT_BLOCK_SIZE, 0, 0 },
 955   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 956   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 957   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 958   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 959   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 960   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 961   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 962   {"old-compress",     0,  POPT_ARG_NONE,   0, OPT_OLD_COMPRESS, 0, 0 },
 963   {"new-compress",     0,  POPT_ARG_NONE,   0, OPT_NEW_COMPRESS, 0, 0 },
 964   {"no-compress",      0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 965   {"no-z",             0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 966   {"compress-choice",  0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 967   {"zc",               0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 968   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 969   {"compress-level",   0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 970   {"zl",               0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 971   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 972   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 973   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 974   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 975   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 976   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 977   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 978   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 979   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 980   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 981   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 982   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 983   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 984   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 985   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 986   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 987   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 988   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 989   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
 990   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 991   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 992   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 993   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 994   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 995   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 996   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 997   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 998   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 999   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1000   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1001   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1002   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1003   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1004   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1005   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1006   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1007   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1008   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1009   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1010   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1011   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1012   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1013   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1014   {"stop-after",       0,  POPT_ARG_STRING, 0, OPT_STOP_AFTER, 0, 0 },
1015   {"time-limit",       0,  POPT_ARG_STRING, 0, OPT_STOP_AFTER, 0, 0 }, /* earlier stop-after name */
1016   {"stop-at",          0,  POPT_ARG_STRING, 0, OPT_STOP_AT, 0, 0 },
1017   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1018   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1019   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1020   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1021   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1022   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1023   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1024   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1025   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1026   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1027   {"mkpath",           0,  POPT_ARG_VAL,    &mkpath_dest_arg, 1, 0, 0 },
1028   {"no-mkpath",        0,  POPT_ARG_VAL,    &mkpath_dest_arg, 0, 0, 0 },
1029   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1030   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1031   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1032   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1033   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1034   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1035   {"early-input",      0,  POPT_ARG_STRING, &early_input_file, 0, 0, 0 },
1036   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1037   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1038   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1039   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1040   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1041   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1042   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1043   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1044   /* All the following options switch us into daemon-mode option-parsing. */
1045   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1046   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1047   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1048   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1049   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1050   {0,0,0,0, 0, 0, 0}
1051 };
1052
1053 static void daemon_usage(enum logcode F)
1054 {
1055   print_rsync_version(F);
1056
1057   rprintf(F,"\n");
1058   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1059 #include "help-rsyncd.h"
1060   rprintf(F,"\n");
1061   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1062   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1063 }
1064
1065 static struct poptOption long_daemon_options[] = {
1066   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1067   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1068   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1069   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1070   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1071   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1072   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1073   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1074   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1075   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1076   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1077   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1078   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1079   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1080   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1081   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1082   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1083   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1084   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1085   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1086   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1087   {0,0,0,0, 0, 0, 0}
1088 };
1089
1090
1091 static char err_buf[200];
1092
1093
1094 /**
1095  * Store the option error message, if any, so that we can log the
1096  * connection attempt (which requires parsing the options), and then
1097  * show the error later on.
1098  **/
1099 void option_error(void)
1100 {
1101         if (!err_buf[0]) {
1102                 strlcpy(err_buf, "Error parsing options: option may "
1103                         "be supported on client but not on server?\n",
1104                         sizeof err_buf);
1105         }
1106
1107         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1108         io_flush(MSG_FLUSH);
1109         msleep(20);
1110 }
1111
1112
1113 static void parse_one_refuse_match(int negated, const char *ref, const struct poptOption *list_end)
1114 {
1115         struct poptOption *op;
1116         char shortName[2];
1117         int is_wild = strpbrk(ref, "*?[") != NULL;
1118         int found_match = 0;
1119
1120         shortName[1] = '\0';
1121
1122         if (strcmp("a", ref) == 0 || strcmp("archive", ref) == 0) {
1123                 ref = "[ardlptgoD]";
1124                 is_wild = 1;
1125         }
1126
1127         for (op = long_options; op != list_end; op++) {
1128                 *shortName = op->shortName;
1129                 if ((op->longName && wildmatch(ref, op->longName))
1130                  || (*shortName && wildmatch(ref, shortName))) {
1131                         if (op->descrip[1] == '*')
1132                                 op->descrip = negated ? "a*" : "r*";
1133                         else if (!is_wild)
1134                                 op->descrip = negated ? "a=" : "r=";
1135                         found_match = 1;
1136                         if (!is_wild)
1137                                 break;
1138                 }
1139         }
1140
1141         if (!found_match)
1142                 rprintf(FLOG, "No match for refuse-options string \"%s\"\n", ref);
1143 }
1144
1145
1146 /**
1147  * Tweak the option table to disable all options that the rsyncd.conf
1148  * file has told us to refuse.
1149  **/
1150 static void set_refuse_options(void)
1151 {
1152         struct poptOption *op, *list_end = NULL;
1153         char *cp, *ref = lp_refuse_options(module_id);
1154         int negated;
1155
1156         if (!ref)
1157                 ref = "";
1158
1159         if (!am_daemon)
1160                 ref = "";
1161
1162         /* We abuse the descrip field in poptOption to make it easy to flag which options
1163          * are refused (since we don't use it otherwise).  Start by marking all options
1164          * as "a"ccepted with a few options also marked as non-wild. */
1165         for (op = long_options; ; op++) {
1166                 const char *longName = op->longName ? op->longName : "";
1167                 if (!op->longName && !op->shortName) {
1168                         list_end = op;
1169                         break;
1170                 }
1171                 if (!am_daemon
1172                  || op->shortName == 'e' /* Required for compatibility flags */
1173                  || op->shortName == '0' /* --from0 just modifies --files-from, so refuse that instead (or not) */
1174                  || op->shortName == 's' /* --protect-args is always OK */
1175                  || op->shortName == 'n' /* --dry-run is always OK */
1176                  || strcmp("iconv", longName) == 0
1177                  || strcmp("no-iconv", longName) == 0
1178                  || strcmp("checksum-seed", longName) == 0
1179                  || strcmp("write-devices", longName) == 0 /* disable wild-match (it gets refused below) */
1180                  || strcmp("log-format", longName) == 0 /* aka out-format (NOT log-file-format) */
1181                  || strcmp("sender", longName) == 0
1182                  || strcmp("server", longName) == 0)
1183                         op->descrip = "a="; /* exact-match only */
1184                 else
1185                         op->descrip = "a*"; /* wild-card-able */
1186         }
1187         assert(list_end != NULL);
1188
1189         if (am_daemon) { /* Refused by default, but can be accepted via a negated exact match. */
1190                 parse_one_refuse_match(0, "write-devices", list_end);
1191         }
1192
1193         while (1) {
1194                 while (*ref == ' ') ref++;
1195                 if (!*ref)
1196                         break;
1197                 if ((cp = strchr(ref, ' ')) != NULL)
1198                         *cp = '\0';
1199                 negated = *ref == '!';
1200                 if (negated && ref[1])
1201                         ref++;
1202                 parse_one_refuse_match(negated, ref, list_end);
1203                 if (!cp)
1204                         break;
1205                 *cp = ' ';
1206                 ref = cp + 1;
1207         }
1208
1209         if (am_daemon) {
1210 #ifdef ICONV_OPTION
1211                 if (!*lp_charset(module_id))
1212                         parse_one_refuse_match(0, "iconv", list_end);
1213 #endif
1214                 parse_one_refuse_match(0, "log-file*", list_end);
1215         }
1216
1217 #ifndef SUPPORT_ATIMES
1218         parse_one_refuse_match(0, "atimes", list_end);
1219 #endif
1220 #ifndef SUPPORT_HARD_LINKS
1221         parse_one_refuse_match(0, "link-dest", list_end);
1222 #endif
1223 #ifndef HAVE_MKTIME
1224         parse_one_refuse_match(0, "stop-at", list_end);
1225 #endif
1226 #ifndef ICONV_OPTION
1227         parse_one_refuse_match(0, "iconv", list_end);
1228 #endif
1229 #ifndef HAVE_SETVBUF
1230         parse_one_refuse_match(0, "outbuf", list_end);
1231 #endif
1232 #ifndef SUPPORT_CRTIMES
1233         parse_one_refuse_match(0, "crtimes", list_end);
1234 #endif
1235
1236         /* Now we use the descrip values to actually mark the options for refusal. */
1237         for (op = long_options; op != list_end; op++) {
1238                 int refused = op->descrip[0] == 'r';
1239                 op->descrip = NULL;
1240                 if (!refused)
1241                         continue;
1242                 if (op->argInfo == POPT_ARG_VAL)
1243                         op->argInfo = POPT_ARG_NONE;
1244                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1245                 /* The following flags are set to let us easily check an implied option later in the code. */
1246                 switch (op->shortName) {
1247                 case 'r': case 'd': case 'l': case 'p':
1248                 case 't': case 'g': case 'o': case 'D':
1249                         refused_archive_part = op->val;
1250                         break;
1251                 case 'z':
1252                         refused_compress = op->val;
1253                         break;
1254                 case '\0':
1255                         if (strcmp("delete", op->longName) == 0)
1256                                 refused_delete = op->val;
1257                         else if (strcmp("delete-before", op->longName) == 0)
1258                                 refused_delete_before = op->val;
1259                         else if (strcmp("delete-during", op->longName) == 0)
1260                                 refused_delete_during = op->val;
1261                         else if (strcmp("partial", op->longName) == 0)
1262                                 refused_partial = op->val;
1263                         else if (strcmp("progress", op->longName) == 0)
1264                                 refused_progress = op->val;
1265                         else if (strcmp("inplace", op->longName) == 0)
1266                                 refused_inplace = op->val;
1267                         else if (strcmp("no-iconv", op->longName) == 0)
1268                                 refused_no_iconv = op->val;
1269                         break;
1270                 }
1271         }
1272 }
1273
1274
1275 static int count_args(const char **argv)
1276 {
1277         int i = 0;
1278
1279         if (argv) {
1280                 while (argv[i] != NULL)
1281                         i++;
1282         }
1283
1284         return i;
1285 }
1286
1287 /* If the size_arg is an invalid string or the value is < min_value, an error
1288  * is put into err_buf & the return is -1.  Note that this parser does NOT
1289  * support negative numbers, so a min_value < 0 doesn't make any sense. */
1290 static ssize_t parse_size_arg(const char *size_arg, char def_suf, const char *opt_name,
1291                               ssize_t min_value, ssize_t max_value, BOOL unlimited_0)
1292 {
1293         int reps, mult, len;
1294         const char *arg, *err = "invalid", *min_max = NULL;
1295         ssize_t limit = -1, size = 1;
1296
1297         for (arg = size_arg; isDigit(arg); arg++) {}
1298         if (*arg == '.' || *arg == get_decimal_point()) /* backward compatibility: always allow '.' */
1299                 for (arg++; isDigit(arg); arg++) {}
1300         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1301         case 'b': case 'B':
1302                 reps = 0;
1303                 break;
1304         case 'k': case 'K':
1305                 reps = 1;
1306                 break;
1307         case 'm': case 'M':
1308                 reps = 2;
1309                 break;
1310         case 'g': case 'G':
1311                 reps = 3;
1312                 break;
1313         case 't': case 'T':
1314                 reps = 4;
1315                 break;
1316         case 'p': case 'P':
1317                 reps = 5;
1318                 break;
1319         default:
1320                 goto failure;
1321         }
1322         if (*arg == 'b' || *arg == 'B')
1323                 mult = 1000, arg++;
1324         else if (!*arg || *arg == '+' || *arg == '-')
1325                 mult = 1024;
1326         else if (strncasecmp(arg, "ib", 2) == 0)
1327                 mult = 1024, arg += 2;
1328         else
1329                 goto failure;
1330         while (reps--)
1331                 size *= mult;
1332         size *= atof(size_arg);
1333         if ((*arg == '+' || *arg == '-') && arg[1] == '1' && arg != size_arg)
1334                 size += atoi(arg), arg += 2;
1335         if (*arg)
1336                 goto failure;
1337         if (size < 0 || (max_value >= 0 && size > max_value)) {
1338                 err = "too large";
1339                 min_max = "max";
1340                 limit = max_value;
1341                 goto failure;
1342         }
1343         if (size < min_value && (!unlimited_0 || size != 0)) {
1344                 err = "too small";
1345                 min_max = "min";
1346                 limit = min_value;
1347                 goto failure;
1348         }
1349         return size;
1350
1351 failure:
1352         len = snprintf(err_buf, sizeof err_buf - 1, "--%s=%s is %s", opt_name, size_arg, err);
1353         if (min_max && limit >= 0 && len < (int)sizeof err_buf - 10) {
1354                 len += snprintf(err_buf + len, sizeof err_buf - len - 1, " (%s: %s%s)",
1355                         min_max, do_big_num(limit, 3, NULL),
1356                         unlimited_0 && min_max[1] == 'i' ? " or 0 for unlimited" : "");
1357         }
1358         err_buf[len] = '\n';
1359         err_buf[len+1] = '\0';
1360         return -1;
1361 }
1362
1363 #ifdef HAVE_MKTIME
1364 /* Allow the user to specify a time in the format yyyy-mm-ddThh:mm while
1365  * also allowing abbreviated data.  For instance, if the time is omitted,
1366  * it defaults to midnight.  If the date is omitted, it defaults to the
1367  * next possible date in the future with the specified time.  Even the
1368  * year or year-month can be omitted, again defaulting to the next date
1369  * in the future that matches the specified information.  A 2-digit year
1370  * is also OK, as is using '/' instead of '-'. */
1371 static time_t parse_time(const char *arg)
1372 {
1373         const char *cp;
1374         time_t val, now = time(NULL);
1375         struct tm t, *today = localtime(&now);
1376         int in_date, old_mday, n;
1377
1378         memset(&t, 0, sizeof t);
1379         t.tm_year = t.tm_mon = t.tm_mday = -1;
1380         t.tm_hour = t.tm_min = t.tm_isdst = -1;
1381         cp = arg;
1382         if (*cp == 'T' || *cp == 't' || *cp == ':') {
1383                 in_date = *cp == ':' ? 0 : -1;
1384                 cp++;
1385         } else
1386                 in_date = 1;
1387         for ( ; ; cp++) {
1388                 if (!isDigit(cp))
1389                         return (time_t)-1;
1390                 n = 0;
1391                 do {
1392                         n = n * 10 + *cp++ - '0';
1393                 } while (isDigit(cp));
1394                 if (*cp == ':')
1395                         in_date = 0;
1396                 if (in_date > 0) {
1397                         if (t.tm_year != -1)
1398                                 return (time_t)-1;
1399                         t.tm_year = t.tm_mon;
1400                         t.tm_mon = t.tm_mday;
1401                         t.tm_mday = n;
1402                         if (!*cp)
1403                                 break;
1404                         if (*cp == 'T' || *cp == 't') {
1405                                 if (!cp[1])
1406                                         break;
1407                                 in_date = -1;
1408                         } else if (*cp != '-' && *cp != '/')
1409                                 return (time_t)-1;
1410                         continue;
1411                 }
1412                 if (t.tm_hour != -1)
1413                         return (time_t)-1;
1414                 t.tm_hour = t.tm_min;
1415                 t.tm_min = n;
1416                 if (!*cp) {
1417                         if (in_date < 0)
1418                                 return (time_t)-1;
1419                         break;
1420                 }
1421                 if (*cp != ':')
1422                         return (time_t)-1;
1423                 in_date = 0;
1424         }
1425
1426         in_date = 0;
1427         if (t.tm_year < 0) {
1428                 t.tm_year = today->tm_year;
1429                 in_date = 1;
1430         } else if (t.tm_year < 100) {
1431                 while (t.tm_year < today->tm_year)
1432                         t.tm_year += 100;
1433         } else
1434                 t.tm_year -= 1900;
1435         if (t.tm_mon < 0) {
1436                 t.tm_mon = today->tm_mon;
1437                 in_date = 2;
1438         } else
1439                 t.tm_mon--;
1440         if (t.tm_mday < 0) {
1441                 t.tm_mday = today->tm_mday;
1442                 in_date = 3;
1443         }
1444
1445         n = 0;
1446         if (t.tm_min < 0) {
1447                 t.tm_hour = t.tm_min = 0;
1448         } else if (t.tm_hour < 0) {
1449                 if (in_date != 3)
1450                         return (time_t)-1;
1451                 in_date = 0;
1452                 t.tm_hour = today->tm_hour;
1453                 n = 60*60;
1454         }
1455
1456         /* Note that mktime() might change a too-large tm_mday into the start of
1457          * the following month which we need to undo in the following code! */
1458         old_mday = t.tm_mday;
1459         if (t.tm_hour > 23 || t.tm_min > 59
1460             || t.tm_mon < 0 || t.tm_mon >= 12
1461             || t.tm_mday < 1 || t.tm_mday > 31
1462             || (val = mktime(&t)) == (time_t)-1)
1463                 return (time_t)-1;
1464
1465         while (in_date && (val <= now || t.tm_mday < old_mday)) {
1466                 switch (in_date) {
1467                 case 3:
1468                         old_mday = ++t.tm_mday;
1469                         break;
1470                 case 2:
1471                         if (t.tm_mday < old_mday)
1472                                 t.tm_mday = old_mday; /* The month already got bumped forward */
1473                         else if (++t.tm_mon == 12) {
1474                                 t.tm_mon = 0;
1475                                 t.tm_year++;
1476                         }
1477                         break;
1478                 case 1:
1479                         if (t.tm_mday < old_mday) {
1480                                 /* mon==1 mday==29 got bumped to mon==2 */
1481                                 if (t.tm_mon != 2 || old_mday != 29)
1482                                         return (time_t)-1;
1483                                 t.tm_mon = 1;
1484                                 t.tm_mday = 29;
1485                         }
1486                         t.tm_year++;
1487                         break;
1488                 }
1489                 if ((val = mktime(&t)) == (time_t)-1) {
1490                         /* This code shouldn't be needed, as mktime() should auto-round to the next month. */
1491                         if (in_date != 3 || t.tm_mday <= 28)
1492                                 return (time_t)-1;
1493                         t.tm_mday = old_mday = 1;
1494                         in_date = 2;
1495                 }
1496         }
1497         if (n) {
1498                 while (val <= now)
1499                         val += n;
1500         }
1501         return val;
1502 }
1503 #endif
1504
1505 static void create_refuse_error(int which)
1506 {
1507         const char *msg;
1508         if (am_daemon)
1509                 msg = "The server is configured to refuse";
1510         else if (am_server)
1511                 msg = "The server does not support";
1512         else
1513                 msg = "This rsync does not support";
1514
1515         /* The "which" value is the index + OPT_REFUSED_BASE. */
1516         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1517         int n = snprintf(err_buf, sizeof err_buf, "%s --%s\n", msg, op->longName) - 1;
1518         if (op->shortName)
1519                 snprintf(err_buf + n, sizeof err_buf - n, " (-%c)\n", op->shortName);
1520 }
1521
1522 /* This is used to make sure that --daemon & --server cannot be aliased to
1523  * something else. These options have always disabled popt aliases for the
1524  * parsing of a daemon or server command-line, but we have to make sure that
1525  * these options cannot vanish so that the alias disabling can take effect. */
1526 static void popt_unalias(poptContext con, const char *opt)
1527 {
1528         struct poptAlias unalias;
1529
1530         memset(&unalias, 0, sizeof unalias);
1531
1532         unalias.longName = opt + 2; /* point past the leading "--" */
1533         unalias.argc = 1;
1534         unalias.argv = new_array0(const char*, 2);
1535         unalias.argv[0] = strdup(opt);
1536
1537         poptAddAlias(con, unalias, 0);
1538 }
1539
1540 char *alt_dest_opt(int type)
1541 {
1542         if (!type)
1543                 type = alt_dest_type;
1544
1545         switch (type) {
1546         case COMPARE_DEST:
1547                 return "--compare-dest";
1548         case COPY_DEST:
1549                 return "--copy-dest";
1550         case LINK_DEST:
1551                 return "--link-dest";
1552         default:
1553                 NOISY_DEATH("Unknown alt_dest_opt type");
1554         }
1555 }
1556
1557 /**
1558  * Process command line arguments.  Called on both local and remote.
1559  *
1560  * @retval 1 if all options are OK; with globals set to appropriate
1561  * values
1562  *
1563  * @retval 0 on error, with err_buf containing an explanation
1564  **/
1565 int parse_arguments(int *argc_p, const char ***argv_p)
1566 {
1567         static poptContext pc;
1568         const char *arg, **argv = *argv_p;
1569         int argc = *argc_p;
1570         int opt, want_dest_type;
1571         int orig_protect_args = protect_args;
1572
1573         if (argc == 0) {
1574                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1575                 return 0;
1576         }
1577
1578         set_refuse_options();
1579
1580 #ifdef ICONV_OPTION
1581         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1582                 iconv_opt = strdup(arg);
1583 #endif
1584
1585         /* TODO: Call poptReadDefaultConfig; handle errors. */
1586
1587         /* The context leaks in case of an error, but if there's a
1588          * problem we always exit anyhow. */
1589         if (pc)
1590                 poptFreeContext(pc);
1591         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1592         if (!am_server) {
1593                 poptReadDefaultConfig(pc, 0);
1594                 popt_unalias(pc, "--daemon");
1595                 popt_unalias(pc, "--server");
1596         }
1597
1598         while ((opt = poptGetNextOpt(pc)) != -1) {
1599                 /* most options are handled automatically by popt;
1600                  * only special cases are returned and listed here. */
1601
1602                 switch (opt) {
1603                 case 'V':
1604                         version_opt_cnt++;
1605                         break;
1606
1607                 case OPT_SERVER:
1608                         if (!am_server) {
1609                                 /* Disable popt aliases on the server side and
1610                                  * then start parsing the options again. */
1611                                 poptFreeContext(pc);
1612                                 pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1613                                 am_server = 1;
1614                         }
1615 #ifdef ICONV_OPTION
1616                         iconv_opt = NULL;
1617 #endif
1618                         break;
1619
1620                 case OPT_SENDER:
1621                         if (!am_server) {
1622                                 usage(FERROR);
1623                                 exit_cleanup(RERR_SYNTAX);
1624                         }
1625                         am_sender = 1;
1626                         break;
1627
1628                 case OPT_DAEMON:
1629                         if (am_daemon) {
1630                                 strlcpy(err_buf,
1631                                         "Attempt to hack rsync thwarted!\n",
1632                                         sizeof err_buf);
1633                                 return 0;
1634                         }
1635 #ifdef ICONV_OPTION
1636                         iconv_opt = NULL;
1637 #endif
1638                         protect_args = 0;
1639                         poptFreeContext(pc);
1640                         pc = poptGetContext(RSYNC_NAME, argc, argv, long_daemon_options, 0);
1641                         while ((opt = poptGetNextOpt(pc)) != -1) {
1642                                 char **cpp;
1643                                 switch (opt) {
1644                                 case 'h':
1645                                         daemon_usage(FINFO);
1646                                         exit_cleanup(0);
1647
1648                                 case 'M':
1649                                         arg = poptGetOptArg(pc);
1650                                         if (!strchr(arg, '=')) {
1651                                                 rprintf(FERROR,
1652                                                         "--dparam value is missing an '=': %s\n",
1653                                                         arg);
1654                                                 goto daemon_error;
1655                                         }
1656                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1657                                         *cpp = strdup(arg);
1658                                         break;
1659
1660                                 case 'v':
1661                                         verbose++;
1662                                         break;
1663
1664                                 default:
1665                                         rprintf(FERROR,
1666                                                 "rsync: %s: %s (in daemon mode)\n",
1667                                                 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1668                                                 poptStrerror(opt));
1669                                         goto daemon_error;
1670                                 }
1671                         }
1672
1673                         if (dparam_list.count && !set_dparams(1))
1674                                 exit_cleanup(RERR_SYNTAX);
1675
1676                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1677                                 snprintf(err_buf, sizeof err_buf,
1678                                          "the --temp-dir path is WAY too long.\n");
1679                                 return 0;
1680                         }
1681
1682                         if (!daemon_opt) {
1683                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1684                             daemon_error:
1685                                 rprintf(FERROR, "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1686                                 exit_cleanup(RERR_SYNTAX);
1687                         }
1688
1689                         *argv_p = argv = poptGetArgs(pc);
1690                         *argc_p = argc = count_args(argv);
1691                         am_starting_up = 0;
1692                         daemon_opt = 0;
1693                         am_daemon = 1;
1694                         return 1;
1695
1696                 case OPT_MODIFY_WINDOW:
1697                         /* The value has already been set by popt, but
1698                          * we need to remember that we're using a
1699                          * non-default setting. */
1700                         modify_window_set = 1;
1701                         break;
1702
1703                 case OPT_FILTER:
1704                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1705                                         rule_template(0), 0);
1706                         break;
1707
1708                 case OPT_EXCLUDE:
1709                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1710                                         rule_template(0), XFLG_OLD_PREFIXES);
1711                         break;
1712
1713                 case OPT_INCLUDE:
1714                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1715                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1716                         break;
1717
1718                 case OPT_EXCLUDE_FROM:
1719                 case OPT_INCLUDE_FROM:
1720                         arg = poptGetOptArg(pc);
1721                         if (sanitize_paths)
1722                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1723                         if (daemon_filter_list.head) {
1724                                 int rej;
1725                                 char *cp = strdup(arg);
1726                                 if (!*cp)
1727                                         rej = 1;
1728                                 else {
1729                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1730                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1731                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1732                                 }
1733                                 free(cp);
1734                                 if (rej)
1735                                         goto options_rejected;
1736                         }
1737                         parse_filter_file(&filter_list, arg,
1738                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1739                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1740                         break;
1741
1742                 case 'a':
1743                         if (refused_archive_part) {
1744                                 create_refuse_error(refused_archive_part);
1745                                 return 0;
1746                         }
1747                         if (!recurse) /* preserve recurse == 2 */
1748                                 recurse = 1;
1749 #ifdef SUPPORT_LINKS
1750                         preserve_links = 1;
1751 #endif
1752                         preserve_perms = 1;
1753                         preserve_times = 1;
1754                         preserve_gid = 1;
1755                         preserve_uid = 1;
1756                         preserve_devices = 1;
1757                         preserve_specials = 1;
1758                         break;
1759
1760                 case 'D':
1761                         preserve_devices = preserve_specials = 1;
1762                         break;
1763
1764                 case OPT_NO_D:
1765                         preserve_devices = preserve_specials = 0;
1766                         break;
1767
1768                 case 'h':
1769                         human_readable++;
1770                         break;
1771
1772                 case 'H':
1773                         preserve_hard_links++;
1774                         break;
1775
1776                 case 'i':
1777                         itemize_changes++;
1778                         break;
1779
1780                 case 'U':
1781                         if (++preserve_atimes > 1)
1782                                 open_noatime = 1;
1783                         break;
1784
1785                 case 'v':
1786                         verbose++;
1787                         break;
1788
1789                 case 'y':
1790                         fuzzy_basis++;
1791                         break;
1792
1793                 case 'q':
1794                         quiet++;
1795                         break;
1796
1797                 case 'x':
1798                         one_file_system++;
1799                         break;
1800
1801                 case 'F':
1802                         switch (++F_option_cnt) {
1803                         case 1:
1804                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1805                                 break;
1806                         case 2:
1807                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1808                                 break;
1809                         }
1810                         break;
1811
1812                 case 'P':
1813                         if (refused_partial || refused_progress) {
1814                                 create_refuse_error(refused_partial ? refused_partial : refused_progress);
1815                                 return 0;
1816                         }
1817                         do_progress = 1;
1818                         keep_partial = 1;
1819                         break;
1820
1821                 case 'z':
1822                         do_compression++;
1823                         break;
1824
1825                 case OPT_OLD_COMPRESS:
1826                         compress_choice = "zlib";
1827                         break;
1828
1829                 case OPT_NEW_COMPRESS:
1830                         compress_choice = "zlibx";
1831                         break;
1832
1833                 case OPT_NO_COMPRESS:
1834                         do_compression = 0;
1835                         compress_choice = NULL;
1836                         break;
1837
1838                 case 'M':
1839                         arg = poptGetOptArg(pc);
1840                         if (*arg != '-') {
1841                                 snprintf(err_buf, sizeof err_buf,
1842                                         "Remote option must start with a dash: %s\n", arg);
1843                                 return 0;
1844                         }
1845                         if (remote_option_cnt+2 >= remote_option_alloc) {
1846                                 remote_option_alloc += 16;
1847                                 remote_options = realloc_array(remote_options,
1848                                                         const char *, remote_option_alloc);
1849                                 if (!remote_option_cnt)
1850                                         remote_options[0] = "ARG0";
1851                         }
1852                         remote_options[++remote_option_cnt] = arg;
1853                         remote_options[remote_option_cnt+1] = NULL;
1854                         break;
1855
1856                 case OPT_WRITE_BATCH:
1857                         /* batch_name is already set */
1858                         write_batch = 1;
1859                         break;
1860
1861                 case OPT_ONLY_WRITE_BATCH:
1862                         /* batch_name is already set */
1863                         write_batch = -1;
1864                         break;
1865
1866                 case OPT_READ_BATCH:
1867                         /* batch_name is already set */
1868                         read_batch = 1;
1869                         break;
1870
1871                 case OPT_NO_ICONV:
1872 #ifdef ICONV_OPTION
1873                         iconv_opt = NULL;
1874 #endif
1875                         break;
1876
1877                 case OPT_BLOCK_SIZE: {
1878                         /* We may not know the real protocol_version at this point if this is the client
1879                          * option parsing, but we still want to check it so that the client can specify
1880                          * a --protocol=29 option with a larger block size. */
1881                         int max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
1882                         ssize_t size;
1883                         arg = poptGetOptArg(pc);
1884                         if ((size = parse_size_arg(arg, 'b', "block-size", 0, max_blength, False)) < 0)
1885                                 return 0;
1886                         block_size = (int32)size;
1887                         break;
1888                 }
1889
1890                 case OPT_MAX_SIZE:
1891                         if ((max_size = parse_size_arg(max_size_arg, 'b', "max-size", 0, -1, False)) < 0)
1892                                 return 0;
1893                         max_size_arg = strdup(do_big_num(max_size, 0, NULL));
1894                         break;
1895
1896                 case OPT_MIN_SIZE:
1897                         if ((min_size = parse_size_arg(min_size_arg, 'b', "min-size", 0, -1, False)) < 0)
1898                                 return 0;
1899                         min_size_arg = strdup(do_big_num(min_size, 0, NULL));
1900                         break;
1901
1902                 case OPT_BWLIMIT: {
1903                         ssize_t size = parse_size_arg(bwlimit_arg, 'K', "bwlimit", 512, -1, True);
1904                         if (size < 0)
1905                                 return 0;
1906                         bwlimit_arg = strdup(do_big_num(size, 0, NULL));
1907                         bwlimit = (size + 512) / 1024;
1908                         break;
1909                 }
1910
1911                 case OPT_APPEND:
1912                         if (am_server)
1913                                 append_mode++;
1914                         else
1915                                 append_mode = 1;
1916                         break;
1917
1918                 case OPT_LINK_DEST:
1919                         want_dest_type = LINK_DEST;
1920                         goto set_dest_dir;
1921
1922                 case OPT_COPY_DEST:
1923                         want_dest_type = COPY_DEST;
1924                         goto set_dest_dir;
1925
1926                 case OPT_COMPARE_DEST:
1927                         want_dest_type = COMPARE_DEST;
1928
1929                 set_dest_dir:
1930                         if (alt_dest_type && alt_dest_type != want_dest_type) {
1931                                 snprintf(err_buf, sizeof err_buf,
1932                                         "ERROR: the %s option conflicts with the %s option\n",
1933                                         alt_dest_opt(want_dest_type), alt_dest_opt(0));
1934                                 return 0;
1935                         }
1936                         alt_dest_type = want_dest_type;
1937
1938                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1939                                 snprintf(err_buf, sizeof err_buf,
1940                                         "ERROR: at most %d %s args may be specified\n",
1941                                         MAX_BASIS_DIRS, alt_dest_opt(0));
1942                                 return 0;
1943                         }
1944                         /* We defer sanitizing this arg until we know what
1945                          * our destination directory is going to be. */
1946                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1947                         break;
1948
1949                 case OPT_CHMOD:
1950                         arg = poptGetOptArg(pc);
1951                         if (!parse_chmod(arg, &chmod_modes)) {
1952                                 snprintf(err_buf, sizeof err_buf,
1953                                         "Invalid argument passed to --chmod (%s)\n",
1954                                         arg);
1955                                 return 0;
1956                         }
1957                         break;
1958
1959                 case OPT_INFO:
1960                         arg = poptGetOptArg(pc);
1961                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1962                         break;
1963
1964                 case OPT_DEBUG:
1965                         arg = poptGetOptArg(pc);
1966                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1967                         break;
1968
1969                 case OPT_USERMAP:
1970                         if (usermap) {
1971                                 if (usermap_via_chown) {
1972                                         snprintf(err_buf, sizeof err_buf,
1973                                                 "--usermap conflicts with prior --chown.\n");
1974                                         return 0;
1975                                 }
1976                                 snprintf(err_buf, sizeof err_buf,
1977                                         "You can only specify --usermap once.\n");
1978                                 return 0;
1979                         }
1980                         usermap = (char *)poptGetOptArg(pc);
1981                         usermap_via_chown = False;
1982                         break;
1983
1984                 case OPT_GROUPMAP:
1985                         if (groupmap) {
1986                                 if (groupmap_via_chown) {
1987                                         snprintf(err_buf, sizeof err_buf,
1988                                                 "--groupmap conflicts with prior --chown.\n");
1989                                         return 0;
1990                                 }
1991                                 snprintf(err_buf, sizeof err_buf,
1992                                         "You can only specify --groupmap once.\n");
1993                                 return 0;
1994                         }
1995                         groupmap = (char *)poptGetOptArg(pc);
1996                         groupmap_via_chown = False;
1997                         break;
1998
1999                 case OPT_CHOWN: {
2000                         const char *chown = poptGetOptArg(pc);
2001                         int len;
2002                         if ((arg = strchr(chown, ':')) != NULL)
2003                                 len = arg++ - chown;
2004                         else
2005                                 len = strlen(chown);
2006                         if (len) {
2007                                 if (usermap) {
2008                                         if (!usermap_via_chown) {
2009                                                 snprintf(err_buf, sizeof err_buf,
2010                                                         "--chown conflicts with prior --usermap.\n");
2011                                                 return 0;
2012                                         }
2013                                         snprintf(err_buf, sizeof err_buf,
2014                                                 "You can only specify a user-affecting --chown once.\n");
2015                                         return 0;
2016                                 }
2017                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
2018                                         out_of_memory("parse_arguments");
2019                                 usermap_via_chown = True;
2020                         }
2021                         if (arg && *arg) {
2022                                 if (groupmap) {
2023                                         if (!groupmap_via_chown) {
2024                                                 snprintf(err_buf, sizeof err_buf,
2025                                                         "--chown conflicts with prior --groupmap.\n");
2026                                                 return 0;
2027                                         }
2028                                         snprintf(err_buf, sizeof err_buf,
2029                                                 "You can only specify a group-affecting --chown once.\n");
2030                                         return 0;
2031                                 }
2032                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
2033                                         out_of_memory("parse_arguments");
2034                                 groupmap_via_chown = True;
2035                         }
2036                         break;
2037                 }
2038
2039                 case OPT_HELP:
2040                         usage(FINFO);
2041                         exit_cleanup(0);
2042
2043                 case 'A':
2044 #ifdef SUPPORT_ACLS
2045                         preserve_acls = 1;
2046                         preserve_perms = 1;
2047                         break;
2048 #else
2049                         /* FIXME: this should probably be ignored with a
2050                          * warning and then countermeasures taken to
2051                          * restrict group and other access in the presence
2052                          * of any more restrictive ACLs, but this is safe
2053                          * for now */
2054                         snprintf(err_buf,sizeof(err_buf),
2055                                  "ACLs are not supported on this %s\n",
2056                                  am_server ? "server" : "client");
2057                         return 0;
2058 #endif
2059
2060                 case 'X':
2061 #ifdef SUPPORT_XATTRS
2062                         preserve_xattrs++;
2063                         break;
2064 #else
2065                         snprintf(err_buf,sizeof(err_buf),
2066                                  "extended attributes are not supported on this %s\n",
2067                                  am_server ? "server" : "client");
2068                         return 0;
2069 #endif
2070
2071                 case OPT_STOP_AFTER: {
2072                         long val;
2073                         arg = poptGetOptArg(pc);
2074                         stop_at_utime = time(NULL);
2075                         if ((val = atol(arg) * 60) <= 0 || LONG_MAX - val < stop_at_utime || (long)(time_t)val != val) {
2076                                 snprintf(err_buf, sizeof err_buf, "invalid --stop-after value: %s\n", arg);
2077                                 return 0;
2078                         }
2079                         stop_at_utime += val;
2080                         break;
2081                 }
2082
2083 #ifdef HAVE_MKTIME
2084                 case OPT_STOP_AT:
2085                         arg = poptGetOptArg(pc);
2086                         if ((stop_at_utime = parse_time(arg)) == (time_t)-1) {
2087                                 snprintf(err_buf, sizeof err_buf, "invalid --stop-at format: %s\n", arg);
2088                                 return 0;
2089                         }
2090                         if (stop_at_utime <= time(NULL)) {
2091                                 snprintf(err_buf, sizeof err_buf, "--stop-at time is not in the future: %s\n", arg);
2092                                 return 0;
2093                         }
2094                         break;
2095 #endif
2096
2097                 case OPT_STDERR: {
2098                         int len;
2099                         arg = poptGetOptArg(pc);
2100                         len = strlen(arg);
2101                         if (len && strncmp("errors", arg, len) == 0)
2102                                 msgs2stderr = 2;
2103                         else if (len && strncmp("all", arg, len) == 0)
2104                                 msgs2stderr = 1;
2105                         else if (len && strncmp("client", arg, len) == 0)
2106                                 msgs2stderr = 0;
2107                         else {
2108                                 snprintf(err_buf, sizeof err_buf,
2109                                         "--stderr mode \"%s\" is not one of errors, all, or client\n", arg);
2110                                 return 0;
2111                         }
2112                         break;
2113                 }
2114
2115                 default:
2116                         /* A large opt value means that set_refuse_options()
2117                          * turned this option off. */
2118                         if (opt >= OPT_REFUSED_BASE) {
2119                                 create_refuse_error(opt);
2120                                 return 0;
2121                         }
2122                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
2123                                  am_server ? "on remote machine: " : "",
2124                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
2125                                  poptStrerror(opt));
2126                         return 0;
2127                 }
2128         }
2129
2130         if (version_opt_cnt) {
2131                 print_rsync_version(FINFO);
2132                 exit_cleanup(0);
2133         }
2134
2135         if (!max_alloc_arg) {
2136                 max_alloc_arg = getenv("RSYNC_MAX_ALLOC");
2137                 if (max_alloc_arg && !*max_alloc_arg)
2138                         max_alloc_arg = NULL;
2139         }
2140         if (max_alloc_arg) {
2141                 ssize_t size = parse_size_arg(max_alloc_arg, 'B', "max-alloc", 1024*1024, -1, True);
2142                 if (size < 0)
2143                         return 0;
2144                 max_alloc = size;
2145         }
2146
2147         if (protect_args < 0) {
2148                 if (am_server)
2149                         protect_args = 0;
2150                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
2151                         protect_args = atoi(arg) ? 1 : 0;
2152                 else {
2153 #ifdef RSYNC_USE_PROTECTED_ARGS
2154                         protect_args = 1;
2155 #else
2156                         protect_args = 0;
2157 #endif
2158                 }
2159         }
2160
2161         if (checksum_choice && strcasecmp(checksum_choice, "auto") != 0 && strcasecmp(checksum_choice, "auto,auto") != 0) {
2162                 /* Call this early to verify the args and figure out if we need to force
2163                  * --whole-file. Note that the parse function will get called again later,
2164                  * just in case an "auto" choice needs to know the protocol_version. */
2165                 parse_checksum_choice(0);
2166         } else
2167                 checksum_choice = NULL;
2168
2169         if (human_readable > 1 && argc == 2 && !am_server) {
2170                 /* Allow the old meaning of 'h' (--help) on its own. */
2171                 usage(FINFO);
2172                 exit_cleanup(0);
2173         }
2174
2175         if (!compress_choice && do_compression > 1)
2176                 compress_choice = "zlibx";
2177         if (compress_choice && strcasecmp(compress_choice, "auto") != 0)
2178                 parse_compress_choice(0); /* Twiddles do_compression and can possibly NULL-out compress_choice. */
2179         else
2180                 compress_choice = NULL;
2181
2182         if (do_compression || do_compression_level != CLVL_NOT_SPECIFIED) {
2183                 if (!do_compression)
2184                         do_compression = CPRES_AUTO;
2185                 if (do_compression && refused_compress) {
2186                         create_refuse_error(refused_compress);
2187                         return 0;
2188                 }
2189         }
2190
2191 #ifdef HAVE_SETVBUF
2192         if (outbuf_mode && !am_server) {
2193                 int mode = *(uchar *)outbuf_mode;
2194                 if (islower(mode))
2195                         mode = toupper(mode);
2196                 fflush(stdout); /* Just in case... */
2197                 switch (mode) {
2198                 case 'N': /* None */
2199                 case 'U': /* Unbuffered */
2200                         mode = _IONBF;
2201                         break;
2202                 case 'L': /* Line */
2203                         mode = _IOLBF;
2204                         break;
2205                 case 'B': /* Block */
2206                 case 'F': /* Full */
2207                         mode = _IOFBF;
2208                         break;
2209                 default:
2210                         snprintf(err_buf, sizeof err_buf,
2211                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
2212                         return 0;
2213                 }
2214                 setvbuf(stdout, (char *)NULL, mode, 0);
2215         }
2216
2217         if (msgs2stderr == 1) { /* Are all messages going to stderr? */
2218                 /* Make stderr line buffered for better sharing of the stream. */
2219                 fflush(stderr); /* Just in case... */
2220                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
2221         }
2222 #endif
2223
2224         set_output_verbosity(verbose, DEFAULT_PRIORITY);
2225
2226         if (do_stats) {
2227                 parse_output_words(info_words, info_levels,
2228                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
2229         }
2230
2231 #ifdef ICONV_OPTION
2232         if (iconv_opt && protect_args != 2) {
2233                 if (!am_server && strcmp(iconv_opt, "-") == 0)
2234                         iconv_opt = NULL;
2235                 else
2236                         need_unsorted_flist = 1;
2237         }
2238         if (refused_no_iconv && !iconv_opt) {
2239                 create_refuse_error(refused_no_iconv);
2240                 return 0;
2241         }
2242 #endif
2243
2244         if (fuzzy_basis > 1)
2245                 fuzzy_basis = basis_dir_cnt + 1;
2246
2247         /* Don't let the client reset protect_args if it was already processed */
2248         if (orig_protect_args == 2 && am_server)
2249                 protect_args = orig_protect_args;
2250
2251         if (protect_args == 1 && am_server)
2252                 return 1;
2253
2254         *argv_p = argv = poptGetArgs(pc);
2255         *argc_p = argc = count_args(argv);
2256
2257 #ifndef SUPPORT_LINKS
2258         if (preserve_links && !am_sender) {
2259                 snprintf(err_buf, sizeof err_buf,
2260                          "symlinks are not supported on this %s\n",
2261                          am_server ? "server" : "client");
2262                 return 0;
2263         }
2264 #endif
2265
2266 #ifndef SUPPORT_HARD_LINKS
2267         if (preserve_hard_links) {
2268                 snprintf(err_buf, sizeof err_buf,
2269                          "hard links are not supported on this %s\n",
2270                          am_server ? "server" : "client");
2271                 return 0;
2272         }
2273 #endif
2274
2275 #ifdef SUPPORT_XATTRS
2276         if (am_root < 0 && preserve_xattrs > 1) {
2277                 snprintf(err_buf, sizeof err_buf,
2278                          "--fake-super conflicts with -XX\n");
2279                 return 0;
2280         }
2281 #else
2282         if (am_root < 0) {
2283                 snprintf(err_buf, sizeof err_buf,
2284                          "--fake-super requires an rsync with extended attributes enabled\n");
2285                 return 0;
2286         }
2287 #endif
2288
2289         if (write_batch && read_batch) {
2290                 snprintf(err_buf, sizeof err_buf,
2291                         "--write-batch and --read-batch can not be used together\n");
2292                 return 0;
2293         }
2294         if (write_batch > 0 || read_batch) {
2295                 if (am_server) {
2296                         rprintf(FINFO,
2297                                 "ignoring --%s-batch option sent to server\n",
2298                                 write_batch ? "write" : "read");
2299                         /* We don't actually exit_cleanup(), so that we can
2300                          * still service older version clients that still send
2301                          * batch args to server. */
2302                         read_batch = write_batch = 0;
2303                         batch_name = NULL;
2304                 } else if (dry_run)
2305                         write_batch = 0;
2306         } else if (write_batch < 0 && dry_run)
2307                 write_batch = 0;
2308         if (read_batch && files_from) {
2309                 snprintf(err_buf, sizeof err_buf,
2310                         "--read-batch cannot be used with --files-from\n");
2311                 return 0;
2312         }
2313         if (read_batch && remove_source_files) {
2314                 snprintf(err_buf, sizeof err_buf,
2315                         "--read-batch cannot be used with --remove-%s-files\n",
2316                         remove_source_files == 1 ? "source" : "sent");
2317                 return 0;
2318         }
2319         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2320                 snprintf(err_buf, sizeof err_buf,
2321                         "the batch-file name must be %d characters or less.\n",
2322                         MAX_BATCH_NAME_LEN);
2323                 return 0;
2324         }
2325
2326         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2327                 snprintf(err_buf, sizeof err_buf,
2328                          "the --temp-dir path is WAY too long.\n");
2329                 return 0;
2330         }
2331
2332         if (max_delete < 0 && max_delete != INT_MIN) {
2333                 /* Negative numbers are treated as "no deletions". */
2334                 max_delete = 0;
2335         }
2336
2337         if (files_from) {
2338                 if (recurse == 1) /* preserve recurse == 2 */
2339                         recurse = 0;
2340                 if (xfer_dirs < 0)
2341                         xfer_dirs = 1;
2342         }
2343
2344         if (argc < 2 && !read_batch && !am_server)
2345                 list_only |= 1;
2346
2347         if (xfer_dirs >= 4) {
2348                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2349                 recurse = xfer_dirs = 1;
2350         } else if (recurse)
2351                 xfer_dirs = 1;
2352         else if (xfer_dirs < 0)
2353                 xfer_dirs = list_only ? 1 : 0;
2354
2355         if (relative_paths < 0)
2356                 relative_paths = files_from? 1 : 0;
2357         if (!relative_paths)
2358                 implied_dirs = 0;
2359
2360         if (delete_before + !!delete_during + delete_after > 1) {
2361                 snprintf(err_buf, sizeof err_buf,
2362                         "You may not combine multiple --delete-WHEN options.\n");
2363                 return 0;
2364         }
2365         if (delete_before || delete_during || delete_after)
2366                 delete_mode = 1;
2367         else if (delete_mode || delete_excluded) {
2368                 /* Only choose now between before & during if one is refused. */
2369                 if (refused_delete_before) {
2370                         if (!refused_delete_during)
2371                                 delete_during = 1;
2372                         else {
2373                                 create_refuse_error(refused_delete_before);
2374                                 return 0;
2375                         }
2376                 } else if (refused_delete_during)
2377                         delete_before = 1;
2378                 delete_mode = 1;
2379         }
2380         if (!xfer_dirs && delete_mode) {
2381                 snprintf(err_buf, sizeof err_buf,
2382                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2383                 return 0;
2384         }
2385
2386         if (missing_args == 3) /* simplify if both options were specified */
2387                 missing_args = 2;
2388         if (refused_delete && (delete_mode || missing_args == 2)) {
2389                 create_refuse_error(refused_delete);
2390                 return 0;
2391         }
2392
2393         if (remove_source_files) {
2394                 /* We only want to infer this refusal of --remove-source-files
2395                  * via the refusal of "delete", not any of the "delete-FOO"
2396                  * options. */
2397                 if (refused_delete && am_sender) {
2398                         create_refuse_error(refused_delete);
2399                         return 0;
2400                 }
2401                 need_messages_from_generator = 1;
2402         }
2403
2404         if (munge_symlinks && !am_daemon) {
2405                 STRUCT_STAT st;
2406                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2407                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2408                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2409                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2410                                 prefix);
2411                         exit_cleanup(RERR_UNSUPPORTED);
2412                 }
2413         }
2414
2415         if (sanitize_paths) {
2416                 int i;
2417                 for (i = argc; i-- > 0; )
2418                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2419                 if (tmpdir)
2420                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2421                 if (backup_dir)
2422                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2423         }
2424         if (daemon_filter_list.head && !am_sender) {
2425                 filter_rule_list *elp = &daemon_filter_list;
2426                 if (tmpdir) {
2427                         char *dir;
2428                         if (!*tmpdir)
2429                                 goto options_rejected;
2430                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2431                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2432                         if (check_filter(elp, FLOG, dir, 1) < 0)
2433                                 goto options_rejected;
2434                 }
2435                 if (backup_dir) {
2436                         char *dir;
2437                         if (!*backup_dir)
2438                                 goto options_rejected;
2439                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2440                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2441                         if (check_filter(elp, FLOG, dir, 1) < 0)
2442                                 goto options_rejected;
2443                 }
2444         }
2445
2446         if (!backup_suffix)
2447                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2448         backup_suffix_len = strlen(backup_suffix);
2449         if (strchr(backup_suffix, '/') != NULL) {
2450                 snprintf(err_buf, sizeof err_buf,
2451                         "--suffix cannot contain slashes: %s\n",
2452                         backup_suffix);
2453                 return 0;
2454         }
2455         if (backup_dir) {
2456                 size_t len;
2457                 make_backups = 1; /* --backup-dir implies --backup */
2458                 while (*backup_dir == '.' && backup_dir[1] == '/')
2459                         backup_dir += 2;
2460                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2461                         backup_dir++;
2462                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2463                 if (len > sizeof backup_dir_buf - 128) {
2464                         snprintf(err_buf, sizeof err_buf,
2465                                 "the --backup-dir path is WAY too long.\n");
2466                         return 0;
2467                 }
2468                 backup_dir_len = (int)len;
2469                 if (!backup_dir_len) {
2470                         backup_dir_len = -1;
2471                         backup_dir = NULL;
2472                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2473                         backup_dir_buf[backup_dir_len++] = '/';
2474                         backup_dir_buf[backup_dir_len] = '\0';
2475                 }
2476                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2477         }
2478         if (backup_dir) {
2479                 /* No need for a suffix or a protect rule. */
2480         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2481                 snprintf(err_buf, sizeof err_buf,
2482                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2483                         ? "when --backup-dir is the same as the dest dir"
2484                         : "without a --backup-dir");
2485                 return 0;
2486         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2487                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2488                         "P *%s", backup_suffix);
2489                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2490         }
2491
2492         if (preserve_times) {
2493                 preserve_times = PRESERVE_FILE_TIMES;
2494                 if (!omit_dir_times)
2495                         preserve_times |= PRESERVE_DIR_TIMES;
2496 #ifdef CAN_SET_SYMLINK_TIMES
2497                 if (!omit_link_times)
2498                         preserve_times |= PRESERVE_LINK_TIMES;
2499 #endif
2500         }
2501
2502         if (make_backups && !backup_dir) {
2503                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2504                 preserve_times &= ~PRESERVE_DIR_TIMES;
2505         }
2506
2507         if (stdout_format) {
2508                 if (am_server && log_format_has(stdout_format, 'I'))
2509                         stdout_format_has_i = 2;
2510                 else if (log_format_has(stdout_format, 'i'))
2511                         stdout_format_has_i = itemize_changes | 1;
2512                 if (!log_format_has(stdout_format, 'b')
2513                  && !log_format_has(stdout_format, 'c')
2514                  && !log_format_has(stdout_format, 'C'))
2515                         log_before_transfer = !am_server;
2516         } else if (itemize_changes) {
2517                 stdout_format = "%i %n%L";
2518                 stdout_format_has_i = itemize_changes;
2519                 log_before_transfer = !am_server;
2520         }
2521
2522         if (do_progress && !am_server) {
2523                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2524                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2525                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2526         }
2527
2528         if (dry_run)
2529                 do_xfers = 0;
2530
2531         set_io_timeout(io_timeout);
2532
2533         if (INFO_GTE(NAME, 1) && !stdout_format) {
2534                 stdout_format = "%n%L";
2535                 log_before_transfer = !am_server;
2536         }
2537         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2538                 stdout_format_has_o_or_i = 1;
2539
2540         if (logfile_name && !am_daemon) {
2541                 if (!logfile_format) {
2542                         logfile_format = "%i %n%L";
2543                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2544                 } else {
2545                         if (log_format_has(logfile_format, 'i'))
2546                                 logfile_format_has_i = 1;
2547                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2548                                 logfile_format_has_o_or_i = 1;
2549                 }
2550                 log_init(0);
2551         } else if (!am_daemon)
2552                 logfile_format = NULL;
2553
2554         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2555                 bwlimit = daemon_bwlimit;
2556         if (bwlimit) {
2557                 bwlimit_writemax = (size_t)bwlimit * 128;
2558                 if (bwlimit_writemax < 512)
2559                         bwlimit_writemax = 512;
2560         }
2561
2562         if (append_mode) {
2563                 if (whole_file > 0) {
2564                         snprintf(err_buf, sizeof err_buf,
2565                                  "--append cannot be used with --whole-file\n");
2566                         return 0;
2567                 }
2568                 if (refused_inplace) {
2569                         create_refuse_error(refused_inplace);
2570                         return 0;
2571                 }
2572                 inplace = 1;
2573         }
2574
2575         if (write_devices) {
2576                 if (refused_inplace) {
2577                         create_refuse_error(refused_inplace);
2578                         return 0;
2579                 }
2580                 inplace = 1;
2581         }
2582
2583         if (delay_updates && !partial_dir)
2584                 partial_dir = tmp_partialdir;
2585
2586         if (inplace) {
2587 #ifdef HAVE_FTRUNCATE
2588                 if (partial_dir) {
2589                         snprintf(err_buf, sizeof err_buf,
2590                                  "--%s cannot be used with --%s\n",
2591                                  append_mode ? "append" : "inplace",
2592                                  delay_updates ? "delay-updates" : "partial-dir");
2593                         return 0;
2594                 }
2595                 /* --inplace implies --partial for refusal purposes, but we
2596                  * clear the keep_partial flag for internal logic purposes. */
2597                 if (refused_partial) {
2598                         create_refuse_error(refused_partial);
2599                         return 0;
2600                 }
2601                 keep_partial = 0;
2602 #else
2603                 snprintf(err_buf, sizeof err_buf,
2604                          "--%s is not supported on this %s\n",
2605                          append_mode ? "append" : "inplace",
2606                          am_server ? "server" : "client");
2607                 return 0;
2608 #endif
2609         } else {
2610                 if (keep_partial && !partial_dir && !am_server) {
2611                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2612                                 partial_dir = strdup(arg);
2613                 }
2614                 if (partial_dir) {
2615                         if (*partial_dir)
2616                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2617                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2618                                 partial_dir = NULL;
2619                         if (!partial_dir && refused_partial) {
2620                                 create_refuse_error(refused_partial);
2621                                 return 0;
2622                         }
2623                         keep_partial = 1;
2624                 }
2625         }
2626
2627         if (files_from) {
2628                 char *h, *p;
2629                 int q;
2630                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2631                         usage(FERROR);
2632                         exit_cleanup(RERR_SYNTAX);
2633                 }
2634                 if (strcmp(files_from, "-") == 0) {
2635                         filesfrom_fd = 0;
2636                         if (am_server)
2637                                 filesfrom_host = ""; /* reading from socket */
2638                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2639                         if (am_server) {
2640                                 snprintf(err_buf, sizeof err_buf,
2641                                         "The --files-from sent to the server cannot specify a host.\n");
2642                                 return 0;
2643                         }
2644                         files_from = p;
2645                         filesfrom_host = h;
2646                         if (strcmp(files_from, "-") == 0) {
2647                                 snprintf(err_buf, sizeof err_buf,
2648                                         "Invalid --files-from remote filename\n");
2649                                 return 0;
2650                         }
2651                 } else {
2652                         if (sanitize_paths)
2653                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2654                         if (daemon_filter_list.head) {
2655                                 char *dir;
2656                                 if (!*files_from)
2657                                         goto options_rejected;
2658                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2659                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2660                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2661                                         goto options_rejected;
2662                         }
2663                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2664                         if (filesfrom_fd < 0) {
2665                                 snprintf(err_buf, sizeof err_buf,
2666                                         "failed to open files-from file %s: %s\n",
2667                                         files_from, strerror(errno));
2668                                 return 0;
2669                         }
2670                 }
2671         }
2672
2673         am_starting_up = 0;
2674
2675         return 1;
2676
2677   options_rejected:
2678         snprintf(err_buf, sizeof err_buf,
2679                 "Your options have been rejected by the server.\n");
2680         return 0;
2681 }
2682
2683
2684 /**
2685  * Construct a filtered list of options to pass through from the
2686  * client to the server.
2687  *
2688  * This involves setting options that will tell the server how to
2689  * behave, and also filtering out options that are processed only
2690  * locally.
2691  **/
2692 void server_options(char **args, int *argc_p)
2693 {
2694         static char argstr[64];
2695         int ac = *argc_p;
2696         uchar where;
2697         char *arg;
2698         int i, x;
2699
2700         /* This should always remain first on the server's command-line. */
2701         args[ac++] = "--server";
2702
2703         if (!am_sender)
2704                 args[ac++] = "--sender";
2705
2706         x = 1;
2707         argstr[0] = '-';
2708
2709         if (protect_args)
2710                 argstr[x++] = 's';
2711
2712         for (i = 0; i < verbose; i++)
2713                 argstr[x++] = 'v';
2714
2715         if (quiet && msgs2stderr)
2716                 argstr[x++] = 'q';
2717         if (make_backups)
2718                 argstr[x++] = 'b';
2719         if (update_only)
2720                 argstr[x++] = 'u';
2721         if (!do_xfers) /* Note: NOT "dry_run"! */
2722                 argstr[x++] = 'n';
2723         if (preserve_links)
2724                 argstr[x++] = 'l';
2725         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2726          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2727                 argstr[x++] = 'd';
2728         if (am_sender) {
2729                 if (keep_dirlinks)
2730                         argstr[x++] = 'K';
2731                 if (prune_empty_dirs)
2732                         argstr[x++] = 'm';
2733                 if (omit_dir_times)
2734                         argstr[x++] = 'O';
2735                 if (omit_link_times)
2736                         argstr[x++] = 'J';
2737                 if (fuzzy_basis) {
2738                         argstr[x++] = 'y';
2739                         if (fuzzy_basis > 1)
2740                                 argstr[x++] = 'y';
2741                 }
2742         } else {
2743                 if (copy_links)
2744                         argstr[x++] = 'L';
2745                 if (copy_dirlinks)
2746                         argstr[x++] = 'k';
2747         }
2748
2749         if (whole_file > 0)
2750                 argstr[x++] = 'W';
2751         /* We don't need to send --no-whole-file, because it's the
2752          * default for remote transfers, and in any case old versions
2753          * of rsync will not understand it. */
2754
2755         if (preserve_hard_links) {
2756                 argstr[x++] = 'H';
2757                 if (preserve_hard_links > 1)
2758                         argstr[x++] = 'H';
2759         }
2760         if (preserve_uid)
2761                 argstr[x++] = 'o';
2762         if (preserve_gid)
2763                 argstr[x++] = 'g';
2764         if (preserve_devices) /* ignore preserve_specials here */
2765                 argstr[x++] = 'D';
2766         if (preserve_times)
2767                 argstr[x++] = 't';
2768         if (preserve_atimes) {
2769                 argstr[x++] = 'U';
2770                 if (preserve_atimes > 1)
2771                         argstr[x++] = 'U';
2772         }
2773 #ifdef SUPPORT_CRTIMES
2774         if (preserve_crtimes)
2775                 argstr[x++] = 'N';
2776 #endif
2777         if (preserve_perms)
2778                 argstr[x++] = 'p';
2779         else if (preserve_executability && am_sender)
2780                 argstr[x++] = 'E';
2781 #ifdef SUPPORT_ACLS
2782         if (preserve_acls)
2783                 argstr[x++] = 'A';
2784 #endif
2785 #ifdef SUPPORT_XATTRS
2786         if (preserve_xattrs) {
2787                 argstr[x++] = 'X';
2788                 if (preserve_xattrs > 1)
2789                         argstr[x++] = 'X';
2790         }
2791 #endif
2792         if (recurse)
2793                 argstr[x++] = 'r';
2794         if (always_checksum)
2795                 argstr[x++] = 'c';
2796         if (cvs_exclude)
2797                 argstr[x++] = 'C';
2798         if (ignore_times)
2799                 argstr[x++] = 'I';
2800         if (relative_paths)
2801                 argstr[x++] = 'R';
2802         if (one_file_system) {
2803                 argstr[x++] = 'x';
2804                 if (one_file_system > 1)
2805                         argstr[x++] = 'x';
2806         }
2807         if (sparse_files)
2808                 argstr[x++] = 'S';
2809         if (do_compression == CPRES_ZLIB)
2810                 argstr[x++] = 'z';
2811
2812         set_allow_inc_recurse();
2813
2814         /* We don't really know the actual protocol_version at this point,
2815          * but checking the pre-negotiated value allows the user to use a
2816          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2817         if (protocol_version >= 30) {
2818                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2819 #define eFlags argstr
2820                 /* We make use of the -e option to let the server know about
2821                  * any pre-release protocol version && some behavior flags. */
2822                 eFlags[x++] = 'e';
2823 #if SUBPROTOCOL_VERSION != 0
2824                 if (protocol_version == PROTOCOL_VERSION) {
2825                         x += snprintf(argstr+x, sizeof argstr - x,
2826                                       "%d.%d",
2827                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2828                 } else
2829 #endif
2830                         eFlags[x++] = '.';
2831                 if (allow_inc_recurse)
2832                         eFlags[x++] = 'i';
2833 #ifdef CAN_SET_SYMLINK_TIMES
2834                 eFlags[x++] = 'L'; /* symlink time-setting support */
2835 #endif
2836 #ifdef ICONV_OPTION
2837                 eFlags[x++] = 's'; /* symlink iconv translation support */
2838 #endif
2839                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2840                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2841                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2842                 eFlags[x++] = 'I'; /* support inplace_partial behavior */
2843                 eFlags[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
2844                 eFlags[x++] = 'u'; /* include name of uid 0 & gid 0 in the id map */
2845                 /* NOTE: Avoid using 'V' -- it was the high bit of a write_byte() that became write_varint(). */
2846 #undef eFlags
2847         }
2848
2849         if (x >= (int)sizeof argstr) { /* Not possible... */
2850                 rprintf(FERROR, "argstr overflow in server_options().\n");
2851                 exit_cleanup(RERR_MALLOC);
2852         }
2853
2854         argstr[x] = '\0';
2855
2856         if (x > 1)
2857                 args[ac++] = argstr;
2858
2859 #ifdef ICONV_OPTION
2860         if (iconv_opt) {
2861                 char *set = strchr(iconv_opt, ',');
2862                 if (set)
2863                         set++;
2864                 else
2865                         set = iconv_opt;
2866                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2867                         goto oom;
2868                 args[ac++] = arg;
2869         }
2870 #endif
2871
2872         if (protect_args && !local_server) /* unprotected args stop here */
2873                 args[ac++] = NULL;
2874
2875         if (list_only > 1)
2876                 args[ac++] = "--list-only";
2877
2878         /* This makes sure that the remote rsync can handle deleting with -d
2879          * sans -r because the --no-r option was added at the same time. */
2880         if (xfer_dirs && !recurse && delete_mode && am_sender)
2881                 args[ac++] = "--no-r";
2882
2883         if (do_compression && do_compression_level != CLVL_NOT_SPECIFIED) {
2884                 if (asprintf(&arg, "--compress-level=%d", do_compression_level) < 0)
2885                         goto oom;
2886                 args[ac++] = arg;
2887         }
2888
2889         if (preserve_devices) {
2890                 /* Note: sending "--devices" would not be backward-compatible. */
2891                 if (!preserve_specials)
2892                         args[ac++] = "--no-specials"; /* -D is already set. */
2893         } else if (preserve_specials)
2894                 args[ac++] = "--specials";
2895
2896         /* The server side doesn't use our log-format, but in certain
2897          * circumstances they need to know a little about the option. */
2898         if (stdout_format && am_sender) {
2899                 /* Use --log-format, not --out-format, for compatibility. */
2900                 if (stdout_format_has_i > 1)
2901                         args[ac++] = "--log-format=%i%I";
2902                 else if (stdout_format_has_i)
2903                         args[ac++] = "--log-format=%i";
2904                 else if (stdout_format_has_o_or_i)
2905                         args[ac++] = "--log-format=%o";
2906                 else if (!verbose)
2907                         args[ac++] = "--log-format=X";
2908         }
2909
2910         if (msgs2stderr == 1)
2911                 args[ac++] = "--msgs2stderr";
2912         else if (msgs2stderr == 0)
2913                 args[ac++] = "--no-msgs2stderr";
2914
2915         if (block_size) {
2916                 if (asprintf(&arg, "-B%u", (int)block_size) < 0)
2917                         goto oom;
2918                 args[ac++] = arg;
2919         }
2920
2921         if (io_timeout) {
2922                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2923                         goto oom;
2924                 args[ac++] = arg;
2925         }
2926
2927         if (bwlimit) {
2928                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2929                         goto oom;
2930                 args[ac++] = arg;
2931         }
2932
2933         if (backup_dir) {
2934                 args[ac++] = "--backup-dir";
2935                 args[ac++] = backup_dir;
2936         }
2937
2938         /* Only send --suffix if it specifies a non-default value. */
2939         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2940                 /* We use the following syntax to avoid weirdness with '~'. */
2941                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2942                         goto oom;
2943                 args[ac++] = arg;
2944         }
2945
2946         if (checksum_choice) {
2947                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2948                         goto oom;
2949                 args[ac++] = arg;
2950         }
2951
2952         if (do_compression == CPRES_ZLIBX)
2953                 args[ac++] = "--new-compress";
2954         else if (compress_choice && do_compression == CPRES_ZLIB)
2955                 args[ac++] = "--old-compress";
2956         else if (compress_choice) {
2957                 if (asprintf(&arg, "--compress-choice=%s", compress_choice) < 0)
2958                         goto oom;
2959                 args[ac++] = arg;
2960         }
2961
2962         if (am_sender) {
2963                 if (max_delete > 0) {
2964                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2965                                 goto oom;
2966                         args[ac++] = arg;
2967                 } else if (max_delete == 0)
2968                         args[ac++] = "--max-delete=-1";
2969                 if (min_size >= 0) {
2970                         args[ac++] = "--min-size";
2971                         args[ac++] = min_size_arg;
2972                 }
2973                 if (max_size >= 0) {
2974                         args[ac++] = "--max-size";
2975                         args[ac++] = max_size_arg;
2976                 }
2977                 if (delete_before)
2978                         args[ac++] = "--delete-before";
2979                 else if (delete_during == 2)
2980                         args[ac++] = "--delete-delay";
2981                 else if (delete_during)
2982                         args[ac++] = "--delete-during";
2983                 else if (delete_after)
2984                         args[ac++] = "--delete-after";
2985                 else if (delete_mode && !delete_excluded)
2986                         args[ac++] = "--delete";
2987                 if (delete_excluded)
2988                         args[ac++] = "--delete-excluded";
2989                 if (force_delete)
2990                         args[ac++] = "--force";
2991                 if (write_batch < 0)
2992                         args[ac++] = "--only-write-batch=X";
2993                 if (am_root > 1)
2994                         args[ac++] = "--super";
2995                 if (size_only)
2996                         args[ac++] = "--size-only";
2997                 if (do_stats)
2998                         args[ac++] = "--stats";
2999         } else {
3000                 if (skip_compress) {
3001                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
3002                                 goto oom;
3003                         args[ac++] = arg;
3004                 }
3005         }
3006
3007         if (max_alloc_arg && max_alloc != DEFAULT_MAX_ALLOC) {
3008                 args[ac++] = "--max-alloc";
3009                 args[ac++] = max_alloc_arg;
3010         }
3011
3012         /* --delete-missing-args needs the cooperation of both sides, but
3013          * the sender can handle --ignore-missing-args by itself. */
3014         if (missing_args == 2)
3015                 args[ac++] = "--delete-missing-args";
3016         else if (missing_args == 1 && !am_sender)
3017                 args[ac++] = "--ignore-missing-args";
3018
3019         if (modify_window_set && am_sender) {
3020                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
3021                 if (asprintf(&arg, fmt, modify_window) < 0)
3022                         goto oom;
3023                 args[ac++] = arg;
3024         }
3025
3026         if (checksum_seed) {
3027                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
3028                         goto oom;
3029                 args[ac++] = arg;
3030         }
3031
3032         if (partial_dir && am_sender) {
3033                 if (partial_dir != tmp_partialdir) {
3034                         args[ac++] = "--partial-dir";
3035                         args[ac++] = partial_dir;
3036                 }
3037                 if (delay_updates)
3038                         args[ac++] = "--delay-updates";
3039         } else if (keep_partial && am_sender)
3040                 args[ac++] = "--partial";
3041
3042         if (ignore_errors)
3043                 args[ac++] = "--ignore-errors";
3044
3045         if (copy_unsafe_links)
3046                 args[ac++] = "--copy-unsafe-links";
3047
3048         if (safe_symlinks)
3049                 args[ac++] = "--safe-links";
3050
3051         if (numeric_ids)
3052                 args[ac++] = "--numeric-ids";
3053
3054         if (use_qsort)
3055                 args[ac++] = "--use-qsort";
3056
3057         if (am_sender) {
3058                 if (usermap) {
3059                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
3060                                 goto oom;
3061                         args[ac++] = arg;
3062                 }
3063
3064                 if (groupmap) {
3065                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
3066                                 goto oom;
3067                         args[ac++] = arg;
3068                 }
3069
3070                 if (ignore_existing)
3071                         args[ac++] = "--ignore-existing";
3072
3073                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
3074                 if (ignore_non_existing)
3075                         args[ac++] = "--existing";
3076
3077                 if (tmpdir) {
3078                         args[ac++] = "--temp-dir";
3079                         args[ac++] = tmpdir;
3080                 }
3081
3082                 if (basis_dir[0]) {
3083                         /* the server only needs this option if it is not the sender,
3084                          *   and it may be an older version that doesn't know this
3085                          *   option, so don't send it if client is the sender.
3086                          */
3087                         for (i = 0; i < basis_dir_cnt; i++) {
3088                                 args[ac++] = alt_dest_opt(0);
3089                                 args[ac++] = basis_dir[i];
3090                         }
3091                 }
3092         }
3093
3094         /* What flags do we need to send to the other side? */
3095         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
3096         arg = make_output_option(info_words, info_levels, where);
3097         if (arg)
3098                 args[ac++] = arg;
3099
3100         if (append_mode) {
3101                 if (append_mode > 1)
3102                         args[ac++] = "--append";
3103                 args[ac++] = "--append";
3104         } else if (inplace)
3105                 args[ac++] = "--inplace";
3106
3107         if (files_from && (!am_sender || filesfrom_host)) {
3108                 if (filesfrom_host) {
3109                         args[ac++] = "--files-from";
3110                         args[ac++] = files_from;
3111                         if (eol_nulls)
3112                                 args[ac++] = "--from0";
3113                 } else {
3114                         args[ac++] = "--files-from=-";
3115                         args[ac++] = "--from0";
3116                 }
3117                 if (!relative_paths)
3118                         args[ac++] = "--no-relative";
3119         }
3120         /* It's OK that this checks the upper-bound of the protocol_version. */
3121         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
3122                 args[ac++] = "--no-implied-dirs";
3123
3124         if (write_devices && am_sender)
3125                 args[ac++] = "--write-devices";
3126
3127         if (remove_source_files == 1)
3128                 args[ac++] = "--remove-source-files";
3129         else if (remove_source_files)
3130                 args[ac++] = "--remove-sent-files";
3131
3132         if (preallocate_files && am_sender)
3133                 args[ac++] = "--preallocate";
3134
3135         if (open_noatime && preserve_atimes <= 1)
3136                 args[ac++] = "--open-noatime";
3137
3138         if (mkpath_dest_arg && am_sender)
3139                 args[ac++] = "--mkpath";
3140
3141         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
3142                 rprintf(FERROR, "argc overflow in server_options().\n");
3143                 exit_cleanup(RERR_MALLOC);
3144         }
3145
3146         if (remote_option_cnt) {
3147                 int j;
3148                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
3149                         rprintf(FERROR, "too many remote options specified.\n");
3150                         exit_cleanup(RERR_SYNTAX);
3151                 }
3152                 for (j = 1; j <= remote_option_cnt; j++)
3153                         args[ac++] = (char*)remote_options[j];
3154         }
3155
3156         *argc_p = ac;
3157         return;
3158
3159     oom:
3160         out_of_memory("server_options");
3161 }
3162
3163 /* If str points to a valid hostspec, return allocated memory containing the
3164  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
3165  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
3166  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
3167  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
3168  * (required for parsing) [ and ] chars elided from the returned string. */
3169 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
3170 {
3171         char *s, *host_start = str;
3172         int hostlen = 0, userlen = 0;
3173         char *ret;
3174
3175         for (s = str; ; s++) {
3176                 if (!*s) {
3177                         /* It is only OK if we run out of string with rsync:// */
3178                         if (!port_ptr)
3179                                 return NULL;
3180                         if (!hostlen)
3181                                 hostlen = s - host_start;
3182                         break;
3183                 }
3184                 if (*s == ':' || *s == '/') {
3185                         if (!hostlen)
3186                                 hostlen = s - host_start;
3187                         if (*s++ == '/') {
3188                                 if (!port_ptr)
3189                                         return NULL;
3190                         } else if (port_ptr) {
3191                                 *port_ptr = atoi(s);
3192                                 while (isDigit(s)) s++;
3193                                 if (*s && *s++ != '/')
3194                                         return NULL;
3195                         }
3196                         break;
3197                 }
3198                 if (*s == '@') {
3199                         userlen = s - str + 1;
3200                         host_start = s + 1;
3201                 } else if (*s == '[') {
3202                         if (s != host_start++)
3203                                 return NULL;
3204                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
3205                         hostlen = s - host_start;
3206                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
3207                                 return NULL;
3208                 }
3209         }
3210
3211         *path_start_ptr = s;
3212         ret = new_array(char, userlen + hostlen + 1);
3213         if (userlen)
3214                 strlcpy(ret, str, userlen + 1);
3215         strlcpy(ret + userlen, host_start, hostlen + 1);
3216         return ret;
3217 }
3218
3219 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
3220  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
3221  * memory with the HOST.  If a daemon-accessing spec was specified, the value
3222  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
3223  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
3224  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
3225  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
3226 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
3227 {
3228         char *path;
3229
3230         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
3231                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
3232                 if (*host_ptr) {
3233                         if (!*port_ptr)
3234                                 *port_ptr = -1; /* -1 indicates they want the default */
3235                         return path;
3236                 }
3237         }
3238
3239         *host_ptr = parse_hostspec(s, &path, NULL);
3240         if (!*host_ptr)
3241                 return NULL;
3242
3243         if (*path == ':') {
3244                 if (port_ptr && !*port_ptr)
3245                         *port_ptr = -1;
3246                 return path + 1;
3247         }
3248         if (port_ptr)
3249                 *port_ptr = 0;
3250
3251         return path;
3252 }