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