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