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) 2002-2009 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 <popt.h>
  25 #include "zlib/zlib.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 filter_rule_list filter_list;
  33 extern filter_rule_list daemon_filter_list;
  34
  35 int make_backups = 0;
  36
  37 /**
  38  * If 1, send the whole file as literal data rather than trying to
  39  * create an incremental diff.
  40  *
  41  * If -1, then look at whether we're local or remote and go by that.
  42  *
  43  * @sa disable_deltas_p()
  44  **/
  45 int whole_file = -1;
  46
  47 int append_mode = 0;
  48 int keep_dirlinks = 0;
  49 int copy_dirlinks = 0;
  50 int copy_links = 0;
  51 int preserve_links = 0;
  52 int preserve_hard_links = 0;
  53 int preserve_acls = 0;
  54 int preserve_xattrs = 0;
  55 int preserve_perms = 0;
  56 int preserve_executability = 0;
  57 int preserve_devices = 0;
  58 int preserve_specials = 0;
  59 int preserve_uid = 0;
  60 int preserve_gid = 0;
  61 int preserve_times = 0;
  62 int update_only = 0;
  63 int cvs_exclude = 0;
  64 int dry_run = 0;
  65 int do_xfers = 1;
  66 int ignore_times = 0;
  67 int delete_mode = 0;
  68 int delete_during = 0;
  69 int delete_before = 0;
  70 int delete_after = 0;
  71 int delete_excluded = 0;
  72 int remove_source_files = 0;
  73 int one_file_system = 0;
  74 int protocol_version = PROTOCOL_VERSION;
  75 int sparse_files = 0;
  76 int do_compression = 0;
  77 int def_compress_level = Z_DEFAULT_COMPRESSION;
  78 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  79 int am_server = 0;
  80 int am_sender = 0;
  81 int am_starting_up = 1;
  82 int relative_paths = -1;
  83 int implied_dirs = 1;
  84 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  85 int numeric_ids = 0;
  86 int msgs2stderr = 0;
  87 int allow_8bit_chars = 0;
  88 int force_delete = 0;
  89 int io_timeout = 0;
  90 int prune_empty_dirs = 0;
  91 int use_qsort = 0;
  92 char *files_from = NULL;
  93 int filesfrom_fd = -1;
  94 char *filesfrom_host = NULL;
  95 int eol_nulls = 0;
  96 int protect_args = 0;
  97 int human_readable = 1;
  98 int recurse = 0;
  99 int allow_inc_recurse = 1;
 100 int xfer_dirs = -1;
 101 int am_daemon = 0;
 102 int connect_timeout = 0;
 103 int keep_partial = 0;
 104 int safe_symlinks = 0;
 105 int copy_unsafe_links = 0;
 106 int munge_symlinks = 0;
 107 int size_only = 0;
 108 int daemon_bwlimit = 0;
 109 int bwlimit = 0;
 110 int fuzzy_basis = 0;
 111 size_t bwlimit_writemax = 0;
 112 int ignore_existing = 0;
 113 int ignore_non_existing = 0;
 114 int need_messages_from_generator = 0;
 115 int max_delete = INT_MIN;
 116 OFF_T max_size = 0;
 117 OFF_T min_size = 0;
 118 int ignore_errors = 0;
 119 int modify_window = 0;
 120 int blocking_io = -1;
 121 int checksum_seed = 0;
 122 int inplace = 0;
 123 int delay_updates = 0;
 124 long block_size = 0; /* "long" because popt can't set an int32. */
 125 char number_separator;
 126 char *skip_compress = NULL;
 127 item_list dparam_list = EMPTY_ITEM_LIST;
 128
 129 /** Network address family. **/
 130 int default_af_hint
 131 #ifdef INET6
 132         = 0;            /* Any protocol */
 133 #else
 134         = AF_INET;      /* Must use IPv4 */
 135 # ifdef AF_INET6
 136 #  undef AF_INET6
 137 # endif
 138 # define AF_INET6 AF_INET /* make -6 option a no-op */
 139 #endif
 140
 141 /** Do not go into the background when run as --daemon.  Good
 142  * for debugging and required for running as a service on W32,
 143  * or under Unix process-monitors. **/
 144 int no_detach
 145 #if defined _WIN32 || defined __WIN32__
 146         = 1;
 147 #else
 148         = 0;
 149 #endif
 150
 151 int write_batch = 0;
 152 int read_batch = 0;
 153 int backup_dir_len = 0;
 154 int backup_suffix_len;
 155 unsigned int backup_dir_remainder;
 156
 157 char *backup_suffix = NULL;
 158 char *tmpdir = NULL;
 159 char *partial_dir = NULL;
 160 char *basis_dir[MAX_BASIS_DIRS+1];
 161 char *config_file = NULL;
 162 char *shell_cmd = NULL;
 163 char *logfile_name = NULL;
 164 char *logfile_format = NULL;
 165 char *stdout_format = NULL;
 166 char *password_file = NULL;
 167 char *rsync_path = RSYNC_PATH;
 168 char *backup_dir = NULL;
 169 char backup_dir_buf[MAXPATHLEN];
 170 char *sockopts = NULL;
 171 char *usermap = NULL;
 172 char *groupmap = NULL;
 173 int rsync_port = 0;
 174 int compare_dest = 0;
 175 int copy_dest = 0;
 176 int link_dest = 0;
 177 int basis_dir_cnt = 0;
 178 char *dest_option = NULL;
 179
 180 static int remote_option_alloc = 0;
 181 int remote_option_cnt = 0;
 182 const char **remote_options = NULL;
 183
 184 int quiet = 0;
 185 int output_motd = 1;
 186 int log_before_transfer = 0;
 187 int stdout_format_has_i = 0;
 188 int stdout_format_has_o_or_i = 0;
 189 int logfile_format_has_i = 0;
 190 int logfile_format_has_o_or_i = 0;
 191 int always_checksum = 0;
 192 int list_only = 0;
 193
 194 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 195 char *batch_name = NULL;
 196
 197 int need_unsorted_flist = 0;
 198 #ifdef ICONV_OPTION
 199 char *iconv_opt = ICONV_OPTION;
 200 #endif
 201
 202 struct chmod_mode_struct *chmod_modes = NULL;
 203
 204 static const char *debug_verbosity[] = {
 205         /*0*/ NULL,
 206         /*1*/ NULL,
 207         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 208         /*3*/ "ACL,BACKUP,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 209         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 210         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 211 };
 212
 213 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 214
 215 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 216         /*0*/ NULL,
 217         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 218         /*2*/ "BACKUP,MOUNT,NAME2,REMOVE,SKIP",
 219 };
 220
 221 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 222
 223 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 224
 225 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 226 #define HELP_PRIORITY 1         /* The help output uses this level. */
 227 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 228 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 229
 230 #define W_CLI (1<<0)    /* client side */
 231 #define W_SRV (1<<1)    /* server side */
 232 #define W_SND (1<<2)    /* sending side */
 233 #define W_REC (1<<3)    /* receiving side */
 234
 235 struct output_struct {
 236         char *name;     /* The name of the info/debug flag. */
 237         char *help;     /* The description of the info/debug flag. */
 238         uchar namelen;  /* The length of the name string. */
 239         uchar flag;     /* The flag's value, for consistency check. */
 240         uchar where;    /* Bits indicating where the flag is used. */
 241         uchar priority; /* See *_PRIORITY defines. */
 242 };
 243
 244 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 245
 246 static struct output_struct info_words[COUNT_INFO+1] = {
 247         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 248         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 249         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 250         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 251         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information"),
 252         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 253         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 254         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 255         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 256         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 257         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 258         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 259         { NULL, "--info", 0, 0, 0, 0 }
 260 };
 261
 262 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 263
 264 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 265         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 266         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 267         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 268         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 269         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events"),
 270         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 271         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 272         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 273         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 274         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-2)"),
 275         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 276         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 277         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 278         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 279         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 280         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions"),
 281         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 282         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 283         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 284         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 285         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 286         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 287         { NULL, "--debug", 0, 0, 0, 0 }
 288 };
 289
 290 static int verbose = 0;
 291 static int do_stats = 0;
 292 static int do_progress = 0;
 293 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 294 static int omit_dir_times = 0;
 295 static int F_option_cnt = 0;
 296 static int modify_window_set;
 297 static int itemize_changes = 0;
 298 static int refused_delete, refused_archive_part, refused_compress;
 299 static int refused_partial, refused_progress, refused_delete_before;
 300 static int refused_delete_during;
 301 static int refused_inplace, refused_no_iconv;
 302 static BOOL usermap_via_chown, groupmap_via_chown;
 303 static char *max_size_arg, *min_size_arg;
 304 static char tmp_partialdir[] = ".~tmp~";
 305
 306 /** Local address to bind.  As a character string because it's
 307  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 308  * address, or a hostname. **/
 309 char *bind_address;
 310
 311 static void output_item_help(struct output_struct *words);
 312
 313 /* This constructs a string that represents all the options set for either
 314  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 315  * This is used both when conveying the user's options to the server, and
 316  * when the help output wants to tell the user what options are implied. */
 317 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 318 {
 319         char *str = words == info_words ? "--info=" : "--debug=";
 320         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 321         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 322         char *buf;
 323
 324         memset(counts, 0, sizeof counts);
 325
 326         for (j = 0; words[j].name; j++) {
 327                 if (words[j].flag != j) {
 328                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 329                                 words == info_words ? "INFO_" : "DEBUG_",
 330                                 words[j].name, words[j].flag, j);
 331                         exit_cleanup(RERR_UNSUPPORTED);
 332                 }
 333                 if (!(words[j].where & where))
 334                         continue;
 335                 if (words[j].priority == DEFAULT_PRIORITY) {
 336                         /* Implied items don't need to be mentioned. */
 337                         skipped++;
 338                         continue;
 339                 }
 340                 len += len ? 1 : strlen(str);
 341                 len += strlen(words[j].name);
 342                 len += levels[j] == 1 ? 0 : 1;
 343
 344                 if (words[j].priority == HELP_PRIORITY)
 345                         continue; /* no abbreviating for help */
 346
 347                 assert(levels[j] <= MAX_OUT_LEVEL);
 348                 if (++counts[levels[j]] > max) {
 349                         /* Determine which level has the most items. */
 350                         lev = levels[j];
 351                         max = counts[lev];
 352                 }
 353         }
 354
 355         /* Sanity check the COUNT_* define against the length of the table. */
 356         if (j != word_count) {
 357                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 358                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 359                         j, word_count);
 360                 exit_cleanup(RERR_UNSUPPORTED);
 361         }
 362
 363         if (!len)
 364                 return NULL;
 365
 366         len++;
 367         if (!(buf = new_array(char, len)))
 368                 out_of_memory("make_output_option");
 369         pos = 0;
 370
 371         if (skipped || max < 5)
 372                 lev = -1;
 373         else {
 374                 if (lev == 0)
 375                         pos += snprintf(buf, len, "%sNONE", str);
 376                 else if (lev == 1)
 377                         pos += snprintf(buf, len, "%sALL", str);
 378                 else
 379                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 380         }
 381
 382         for (j = 0; words[j].name && pos < len; j++) {
 383                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 384                         continue;
 385                 if (pos)
 386                         buf[pos++] = ',';
 387                 else
 388                         pos += strlcpy(buf+pos, str, len-pos);
 389                 if (pos < len)
 390                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 391                 /* Level 1 is implied by the name alone. */
 392                 if (levels[j] != 1 && pos < len)
 393                         buf[pos++] = '0' + levels[j];
 394         }
 395
 396         buf[pos] = '\0';
 397
 398         return buf;
 399 }
 400
 401 static void parse_output_words(struct output_struct *words, short *levels,
 402                                const char *str, uchar priority)
 403 {
 404         const char *s;
 405         int j, len, lev;
 406
 407         if (!str)
 408                 return;
 409
 410         while (*str) {
 411                 if ((s = strchr(str, ',')) != NULL)
 412                         len = s++ - str;
 413                 else
 414                         len = strlen(str);
 415                 while (len && isDigit(str+len-1))
 416                         len--;
 417                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 418                 if (lev > MAX_OUT_LEVEL)
 419                         lev = MAX_OUT_LEVEL;
 420                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 421                         output_item_help(words);
 422                         exit_cleanup(0);
 423                 }
 424                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 425                         len = lev = 0;
 426                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 427                         len = 0;
 428                 for (j = 0; words[j].name; j++) {
 429                         if (!len
 430                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 431                                 if (priority >= words[j].priority) {
 432                                         words[j].priority = priority;
 433                                         levels[j] = lev;
 434                                 }
 435                                 if (len)
 436                                         break;
 437                         }
 438                 }
 439                 if (len && !words[j].name) {
 440                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 441                                 words[j].help, len, str);
 442                         exit_cleanup(RERR_SYNTAX);
 443                 }
 444                 if (!s)
 445                         break;
 446                 str = s;
 447         }
 448 }
 449
 450 /* Tell the user what all the info or debug flags mean. */
 451 static void output_item_help(struct output_struct *words)
 452 {
 453         short *levels = words == info_words ? info_levels : debug_levels;
 454         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 455         char buf[128], *opt, *fmt = "%-10s %s\n";
 456         int j;
 457
 458         reset_output_levels();
 459
 460         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 461         rprintf(FINFO, "\n");
 462         for (j = 0; words[j].name; j++)
 463                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 464         rprintf(FINFO, "\n");
 465
 466         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 467                  words[j].help, MAX_OUT_LEVEL);
 468         rprintf(FINFO, fmt, "ALL", buf);
 469
 470         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 471                  words[j].help);
 472         rprintf(FINFO, fmt, "NONE", buf);
 473
 474         rprintf(FINFO, fmt, "HELP", "Output this help message");
 475         rprintf(FINFO, "\n");
 476         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 477
 478         for (j = 1; j <= MAX_VERBOSITY; j++) {
 479                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 480                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 481                 if (opt) {
 482                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 483                         free(opt);
 484                 }
 485                 reset_output_levels();
 486         }
 487 }
 488
 489 /* The --verbose option now sets info+debug flags. */
 490 static void set_output_verbosity(int level, uchar priority)
 491 {
 492         int j;
 493
 494         if (level > MAX_VERBOSITY)
 495                 level = MAX_VERBOSITY;
 496
 497         for (j = 1; j <= level; j++) {
 498                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 499                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 500         }
 501 }
 502
 503 /* Limit the info+debug flag levels given a verbose-option level limit. */
 504 void limit_output_verbosity(int level)
 505 {
 506         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 507         int j;
 508
 509         if (level > MAX_VERBOSITY)
 510                 return;
 511
 512         memset(info_limits, 0, sizeof info_limits);
 513         memset(debug_limits, 0, sizeof debug_limits);
 514
 515         /* Compute the level limits in the above arrays. */
 516         for (j = 1; j <= level; j++) {
 517                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 518                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 519         }
 520
 521         for (j = 0; j < COUNT_INFO; j++) {
 522                 if (info_levels[j] > info_limits[j])
 523                         info_levels[j] = info_limits[j];
 524         }
 525
 526         for (j = 0; j < COUNT_DEBUG; j++) {
 527                 if (debug_levels[j] > debug_limits[j])
 528                         debug_levels[j] = debug_limits[j];
 529         }
 530 }
 531
 532 void reset_output_levels(void)
 533 {
 534         int j;
 535
 536         memset(info_levels, 0, sizeof info_levels);
 537         memset(debug_levels, 0, sizeof debug_levels);
 538
 539         for (j = 0; j < COUNT_INFO; j++)
 540                 info_words[j].priority = DEFAULT_PRIORITY;
 541
 542         for (j = 0; j < COUNT_DEBUG; j++)
 543                 debug_words[j].priority = DEFAULT_PRIORITY;
 544 }
 545
 546 void negate_output_levels(void)
 547 {
 548         int j;
 549
 550         for (j = 0; j < COUNT_INFO; j++)
 551                 info_levels[j] *= -1;
 552
 553         for (j = 0; j < COUNT_DEBUG; j++)
 554                 debug_levels[j] *= -1;
 555 }
 556
 557 static void print_rsync_version(enum logcode f)
 558 {
 559         char *subprotocol = "";
 560         char const *got_socketpair = "no ";
 561         char const *have_inplace = "no ";
 562         char const *hardlinks = "no ";
 563         char const *symtimes = "no ";
 564         char const *acls = "no ";
 565         char const *xattrs = "no ";
 566         char const *links = "no ";
 567         char const *iconv = "no ";
 568         char const *ipv6 = "no ";
 569         STRUCT_STAT *dumstat;
 570
 571 #if SUBPROTOCOL_VERSION != 0
 572         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
 573                 out_of_memory("print_rsync_version");
 574 #endif
 575 #ifdef HAVE_SOCKETPAIR
 576         got_socketpair = "";
 577 #endif
 578 #ifdef HAVE_FTRUNCATE
 579         have_inplace = "";
 580 #endif
 581 #ifdef SUPPORT_HARD_LINKS
 582         hardlinks = "";
 583 #endif
 584 #ifdef SUPPORT_ACLS
 585         acls = "";
 586 #endif
 587 #ifdef SUPPORT_XATTRS
 588         xattrs = "";
 589 #endif
 590 #ifdef SUPPORT_LINKS
 591         links = "";
 592 #endif
 593 #ifdef INET6
 594         ipv6 = "";
 595 #endif
 596 #ifdef ICONV_OPTION
 597         iconv = "";
 598 #endif
 599 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 600         symtimes = "";
 601 #endif
 602
 603         rprintf(f, "%s  version %s  protocol version %d%s\n",
 604                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 605         rprintf(f, "Copyright (C) 1996-2009 by Andrew Tridgell, Wayne Davison, and others.\n");
 606         rprintf(f, "Web site: http://rsync.samba.org/\n");
 607         rprintf(f, "Capabilities:\n");
 608         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
 609                 (int)(sizeof (OFF_T) * 8),
 610                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
 611                 (int)(sizeof (time_t) * 8),
 612                 (int)(sizeof (int64) * 8));
 613         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
 614                 got_socketpair, hardlinks, links, ipv6, have_inplace);
 615         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes\n",
 616                 have_inplace, acls, xattrs, iconv, symtimes);
 617
 618 #ifdef MAINTAINER_MODE
 619         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 620 #endif
 621
 622 #if SIZEOF_INT64 < 8
 623         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 624 #endif
 625         if (sizeof (int64) != SIZEOF_INT64) {
 626                 rprintf(f,
 627                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 628                         (int) SIZEOF_INT64, (int) sizeof (int64));
 629         }
 630
 631         rprintf(f,"\n");
 632         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 633         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 634         rprintf(f,"General Public Licence for details.\n");
 635 }
 636
 637
 638 void usage(enum logcode F)
 639 {
 640   print_rsync_version(F);
 641
 642   rprintf(F,"\n");
 643   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 644   rprintf(F,"via a fast differencing algorithm.\n");
 645
 646   rprintf(F,"\n");
 647   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 648   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 649   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 650   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 651   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 652   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 653   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 654   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 655   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 656   rprintf(F,"\n");
 657   rprintf(F,"Options\n");
 658   rprintf(F," -v, --verbose               increase verbosity\n");
 659   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
 660   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
 661   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 662   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
 663   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 664   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
 665   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 666   rprintf(F," -r, --recursive             recurse into directories\n");
 667   rprintf(F," -R, --relative              use relative path names\n");
 668   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 669   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 670   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 671   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 672   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 673   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 674   rprintf(F,"     --append                append data onto shorter files\n");
 675   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
 676   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 677   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 678   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 679   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 680   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 681   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
 682   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 683   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 684   rprintf(F," -H, --hard-links            preserve hard links\n");
 685   rprintf(F," -p, --perms                 preserve permissions\n");
 686   rprintf(F," -E, --executability         preserve the file's executability\n");
 687   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
 688 #ifdef SUPPORT_ACLS
 689   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
 690 #endif
 691 #ifdef SUPPORT_XATTRS
 692   rprintf(F," -X, --xattrs                preserve extended attributes\n");
 693 #endif
 694   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 695   rprintf(F," -g, --group                 preserve group\n");
 696   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 697   rprintf(F,"     --specials              preserve special files\n");
 698   rprintf(F," -D                          same as --devices --specials\n");
 699   rprintf(F," -t, --times                 preserve modification times\n");
 700   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
 701   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 702 #ifdef SUPPORT_XATTRS
 703   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
 704 #endif
 705   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 706   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
 707   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
 708   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 709   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 710   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 711   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 712   rprintf(F,"     --existing              skip creating new files on receiver\n");
 713   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 714   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
 715   rprintf(F,"     --del                   an alias for --delete-during\n");
 716   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 717   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
 718   rprintf(F,"     --delete-during         receiver deletes during transfer (default)\n");
 719   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
 720   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
 721   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 722   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
 723   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
 724   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 725   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 726   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 727   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 728   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 729   rprintf(F,"     --partial               keep partially transferred files\n");
 730   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 731   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 732   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 733   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 734   rprintf(F,"     --usermap=STRING        custom username mapping\n");
 735   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
 736   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
 737   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
 738   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
 739   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 740   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
 741   rprintf(F,"     --size-only             skip files that match in size\n");
 742   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
 743   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 744   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 745   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 746   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 747   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 748   rprintf(F," -z, --compress              compress file data during the transfer\n");
 749   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 750   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
 751   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 752   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 753   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 754   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 755   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 756   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 757   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 758   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 759   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 760   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 761   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
 762   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 763   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 764   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 765   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 766   rprintf(F,"     --stats                 give some file-transfer stats\n");
 767   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 768   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 769   rprintf(F,"     --progress              show progress during transfer\n");
 770   rprintf(F," -P                          same as --partial --progress\n");
 771   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 772   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 773   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 774   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 775   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
 776   rprintf(F,"     --list-only             list the files instead of copying them\n");
 777   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 778   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 779   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 780   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 781   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 782 #ifdef ICONV_OPTION
 783   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
 784 #endif
 785   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 786   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 787   rprintf(F,"     --version               print version number\n");
 788   rprintf(F,"(-h) --help                  show this help (-h works with no other options)\n");
 789
 790   rprintf(F,"\n");
 791   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 792   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 793   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 794 }
 795
 796 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 797       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 798       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 799       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 800       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 801       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN,
 802       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 803
 804 static struct poptOption long_options[] = {
 805   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 806   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 807   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 808   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 809   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 810   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 811   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 812   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 813   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 814   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 815   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 816   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 817   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 818   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 819   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 820   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 821   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 822   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 823   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 824   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 825   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 826   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 827   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 828   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 829   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 830   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 831   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 832   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 833   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 834   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 835   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 836   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 837   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 838   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 839   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 840   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 841   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 842   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 843   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 844   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 845   {"times",           't', POPT_ARG_VAL,    &preserve_times, 2, 0, 0 },
 846   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 847   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 848   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 849   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 850   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 851   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 852   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 853   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 854   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 855   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 856   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 857   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 858   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 859   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 860   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 861   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 862   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 863   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 864   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 865   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 866   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 867   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 868   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 869   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 870   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 871   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 872   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 873   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 874   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 875   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 876   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 877   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 878   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 879   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 880   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 881   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 882   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 883   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 884   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 885   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 886   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 887   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 888   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 889   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 890   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 891   {"no-one-file-system",'x',POPT_ARG_VAL,   &one_file_system, 0, 0, 0 },
 892   {"no-x",            'x', POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 893   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 894   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 895   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 896   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 897   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 898   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 899   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 900   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 901   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 902   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 903   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 904   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 905   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 906   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 907   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 908   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 909   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 910   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 911   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 912   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 913   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 914   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 915   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 916   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 917   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 918   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 919   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 920   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 921   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 922   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 923   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 924   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 925   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 926   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 927   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 928   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 929   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 930   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 931   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 932   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 933   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 934   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 935   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 936   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 937   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 938   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 939   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 940   {"fuzzy",           'y', POPT_ARG_VAL,    &fuzzy_basis, 1, 0, 0 },
 941   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 942   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 943   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 944   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 945   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 946   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 947   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
 948   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 949   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 950   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 951   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 952   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 953   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 954   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 955   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 956   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 957   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 958   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 959   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 960   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 961   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 962   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 963   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 964   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 965   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 966   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
 967   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 968   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 969   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 970   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 971   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 972   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 973   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 974   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 975   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 976   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 977   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
 978   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
 979   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
 980   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 981   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 982   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
 983   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
 984   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
 985   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
 986   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
 987   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
 988   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
 989   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
 990   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
 991   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 992   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 993   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 994 #ifdef ICONV_OPTION
 995   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
 996   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
 997 #endif
 998   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 999   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1000   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1001   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1002   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1003   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1004   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1005   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1006   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1007   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1008   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1009   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1010   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1011   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1012   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1013   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1014   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1015   /* All the following options switch us into daemon-mode option-parsing. */
1016   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1017   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1018   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1019   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1020   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1021   {0,0,0,0, 0, 0, 0}
1022 };
1023
1024 static void daemon_usage(enum logcode F)
1025 {
1026   print_rsync_version(F);
1027
1028   rprintf(F,"\n");
1029   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1030   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1031   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
1032   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1033   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1034   rprintf(F,"     --no-detach             do not detach from the parent\n");
1035   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1036   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1037   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1038   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1039   rprintf(F," -v, --verbose               increase verbosity\n");
1040   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1041   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1042   rprintf(F,"     --help                  show this help screen\n");
1043
1044   rprintf(F,"\n");
1045   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1046   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1047 }
1048
1049 static struct poptOption long_daemon_options[] = {
1050   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1051   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1052   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1053   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1054   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1055   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1056   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1057   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1058   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1059   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1060   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1061   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1062   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1063   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1064   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1065   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1066   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1067   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1068   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1069   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1070   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1071   {0,0,0,0, 0, 0, 0}
1072 };
1073
1074
1075 static char err_buf[200];
1076
1077
1078 /**
1079  * Store the option error message, if any, so that we can log the
1080  * connection attempt (which requires parsing the options), and then
1081  * show the error later on.
1082  **/
1083 void option_error(void)
1084 {
1085         if (!err_buf[0]) {
1086                 strlcpy(err_buf, "Error parsing options: option may "
1087                         "be supported on client but not on server?\n",
1088                         sizeof err_buf);
1089         }
1090
1091         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1092         msleep(20);
1093 }
1094
1095
1096 /**
1097  * Tweak the option table to disable all options that the rsyncd.conf
1098  * file has told us to refuse.
1099  **/
1100 static void set_refuse_options(char *bp)
1101 {
1102         struct poptOption *op;
1103         char *cp, shortname[2];
1104         int is_wild, found_match;
1105
1106         shortname[1] = '\0';
1107
1108         while (1) {
1109                 while (*bp == ' ') bp++;
1110                 if (!*bp)
1111                         break;
1112                 if ((cp = strchr(bp, ' ')) != NULL)
1113                         *cp= '\0';
1114                 is_wild = strpbrk(bp, "*?[") != NULL;
1115                 found_match = 0;
1116                 for (op = long_options; ; op++) {
1117                         *shortname = op->shortName;
1118                         if (!op->longName && !*shortname)
1119                                 break;
1120                         if ((op->longName && wildmatch(bp, op->longName))
1121                             || (*shortname && wildmatch(bp, shortname))) {
1122                                 if (op->argInfo == POPT_ARG_VAL)
1123                                         op->argInfo = POPT_ARG_NONE;
1124                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1125                                 found_match = 1;
1126                                 /* These flags are set to let us easily check
1127                                  * an implied option later in the code. */
1128                                 switch (*shortname) {
1129                                 case 'r': case 'd': case 'l': case 'p':
1130                                 case 't': case 'g': case 'o': case 'D':
1131                                         refused_archive_part = op->val;
1132                                         break;
1133                                 case 'z':
1134                                         refused_compress = op->val;
1135                                         break;
1136                                 case '\0':
1137                                         if (wildmatch("delete", op->longName))
1138                                                 refused_delete = op->val;
1139                                         else if (wildmatch("delete-before", op->longName))
1140                                                 refused_delete_before = op->val;
1141                                         else if (wildmatch("delete-during", op->longName))
1142                                                 refused_delete_during = op->val;
1143                                         else if (wildmatch("partial", op->longName))
1144                                                 refused_partial = op->val;
1145                                         else if (wildmatch("progress", op->longName))
1146                                                 refused_progress = op->val;
1147                                         else if (wildmatch("inplace", op->longName))
1148                                                 refused_inplace = op->val;
1149                                         else if (wildmatch("no-iconv", op->longName))
1150                                                 refused_no_iconv = op->val;
1151                                         break;
1152                                 }
1153                                 if (!is_wild)
1154                                         break;
1155                         }
1156                 }
1157                 if (!found_match) {
1158                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1159                                 bp);
1160                 }
1161                 if (!cp)
1162                         break;
1163                 *cp = ' ';
1164                 bp = cp + 1;
1165         }
1166 }
1167
1168
1169 static int count_args(const char **argv)
1170 {
1171         int i = 0;
1172
1173         if (argv) {
1174                 while (argv[i] != NULL)
1175                         i++;
1176         }
1177
1178         return i;
1179 }
1180
1181
1182 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1183 {
1184         int reps, mult, make_compatible = 0;
1185         const char *arg;
1186         OFF_T size = 1;
1187
1188         for (arg = *size_arg; isDigit(arg); arg++) {}
1189         if (*arg == '.')
1190                 for (arg++; isDigit(arg); arg++) {}
1191         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1192         case 'b': case 'B':
1193                 reps = 0;
1194                 break;
1195         case 'k': case 'K':
1196                 reps = 1;
1197                 break;
1198         case 'm': case 'M':
1199                 reps = 2;
1200                 break;
1201         case 'g': case 'G':
1202                 reps = 3;
1203                 break;
1204         default:
1205                 return -1;
1206         }
1207         if (*arg == 'b' || *arg == 'B')
1208                 mult = 1000, make_compatible = 1, arg++;
1209         else if (!*arg || *arg == '+' || *arg == '-')
1210                 mult = 1024;
1211         else if (strncasecmp(arg, "ib", 2) == 0)
1212                 mult = 1024, arg += 2;
1213         else
1214                 return -1;
1215         while (reps--)
1216                 size *= mult;
1217         size *= atof(*size_arg);
1218         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1219                 size += atoi(arg), make_compatible = 1, arg += 2;
1220         if (*arg)
1221                 return -1;
1222         if (size > 0 && make_compatible) {
1223                 /* We convert this manually because we may need %lld precision,
1224                  * and that's not a portable sprintf() escape. */
1225                 char buf[128], *s = buf + sizeof buf - 1;
1226                 OFF_T num = size;
1227                 *s = '\0';
1228                 while (num) {
1229                         *--s = (char)(num % 10) + '0';
1230                         num /= 10;
1231                 }
1232                 if (!(*size_arg = strdup(s)))
1233                         out_of_memory("parse_size_arg");
1234         }
1235         return size;
1236 }
1237
1238
1239 static void create_refuse_error(int which)
1240 {
1241         /* The "which" value is the index + OPT_REFUSED_BASE. */
1242         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1243         int n = snprintf(err_buf, sizeof err_buf,
1244                          "The server is configured to refuse --%s\n",
1245                          op->longName) - 1;
1246         if (op->shortName) {
1247                 snprintf(err_buf + n, sizeof err_buf - n,
1248                          " (-%c)\n", op->shortName);
1249         }
1250 }
1251
1252
1253 /**
1254  * Process command line arguments.  Called on both local and remote.
1255  *
1256  * @retval 1 if all options are OK; with globals set to appropriate
1257  * values
1258  *
1259  * @retval 0 on error, with err_buf containing an explanation
1260  **/
1261 int parse_arguments(int *argc_p, const char ***argv_p)
1262 {
1263         static poptContext pc;
1264         char *ref = lp_refuse_options(module_id);
1265         const char *arg, **argv = *argv_p;
1266         int argc = *argc_p;
1267         int opt;
1268
1269         if (ref && *ref)
1270                 set_refuse_options(ref);
1271         if (am_daemon) {
1272                 set_refuse_options("log-file*");
1273 #ifdef ICONV_OPTION
1274                 if (!*lp_charset(module_id))
1275                         set_refuse_options("iconv");
1276 #endif
1277         }
1278
1279 #ifdef ICONV_OPTION
1280         if (!am_daemon && !protect_args && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1281                 iconv_opt = strdup(arg);
1282 #endif
1283
1284         /* TODO: Call poptReadDefaultConfig; handle errors. */
1285
1286         /* The context leaks in case of an error, but if there's a
1287          * problem we always exit anyhow. */
1288         if (pc)
1289                 poptFreeContext(pc);
1290         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1291         if (!am_server)
1292                 poptReadDefaultConfig(pc, 0);
1293
1294         while ((opt = poptGetNextOpt(pc)) != -1) {
1295                 /* most options are handled automatically by popt;
1296                  * only special cases are returned and listed here. */
1297
1298                 switch (opt) {
1299                 case OPT_VERSION:
1300                         print_rsync_version(FINFO);
1301                         exit_cleanup(0);
1302
1303                 case OPT_SERVER:
1304                         if (!am_server) {
1305                                 /* Disable popt aliases on the server side and
1306                                  * then start parsing the options again. */
1307                                 poptFreeContext(pc);
1308                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1309                                                     long_options, 0);
1310                                 am_server = 1;
1311                         }
1312 #ifdef ICONV_OPTION
1313                         iconv_opt = NULL;
1314 #endif
1315                         break;
1316
1317                 case OPT_SENDER:
1318                         if (!am_server) {
1319                                 usage(FERROR);
1320                                 exit_cleanup(RERR_SYNTAX);
1321                         }
1322                         am_sender = 1;
1323                         break;
1324
1325                 case OPT_DAEMON:
1326                         if (am_daemon) {
1327                                 strlcpy(err_buf,
1328                                         "Attempt to hack rsync thwarted!\n",
1329                                         sizeof err_buf);
1330                                 return 0;
1331                         }
1332 #ifdef ICONV_OPTION
1333                         iconv_opt = NULL;
1334 #endif
1335                         poptFreeContext(pc);
1336                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1337                                             long_daemon_options, 0);
1338                         while ((opt = poptGetNextOpt(pc)) != -1) {
1339                                 char **cpp;
1340                                 switch (opt) {
1341                                 case 'h':
1342                                         daemon_usage(FINFO);
1343                                         exit_cleanup(0);
1344
1345                                 case 'M':
1346                                         arg = poptGetOptArg(pc);
1347                                         if (!strchr(arg, '=')) {
1348                                                 rprintf(FERROR,
1349                                                     "--dparam value is missing an '=': %s\n",
1350                                                     arg);
1351                                                 goto daemon_error;
1352                                         }
1353                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1354                                         *cpp = strdup(arg);
1355                                         break;
1356
1357                                 case 'v':
1358                                         verbose++;
1359                                         break;
1360
1361                                 default:
1362                                         rprintf(FERROR,
1363                                             "rsync: %s: %s (in daemon mode)\n",
1364                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1365                                             poptStrerror(opt));
1366                                         goto daemon_error;
1367                                 }
1368                         }
1369
1370                         if (dparam_list.count && !set_dparams(1))
1371                                 exit_cleanup(RERR_SYNTAX);
1372
1373                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1374                                 snprintf(err_buf, sizeof err_buf,
1375                                          "the --temp-dir path is WAY too long.\n");
1376                                 return 0;
1377                         }
1378
1379                         if (!daemon_opt) {
1380                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1381                             daemon_error:
1382                                 rprintf(FERROR,
1383                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1384                                 exit_cleanup(RERR_SYNTAX);
1385                         }
1386
1387                         *argv_p = argv = poptGetArgs(pc);
1388                         *argc_p = argc = count_args(argv);
1389                         am_starting_up = 0;
1390                         daemon_opt = 0;
1391                         am_daemon = 1;
1392                         return 1;
1393
1394                 case OPT_MODIFY_WINDOW:
1395                         /* The value has already been set by popt, but
1396                          * we need to remember that we're using a
1397                          * non-default setting. */
1398                         modify_window_set = 1;
1399                         break;
1400
1401                 case OPT_FILTER:
1402                         parse_rule(&filter_list, poptGetOptArg(pc), 0, 0);
1403                         break;
1404
1405                 case OPT_EXCLUDE:
1406                         parse_rule(&filter_list, poptGetOptArg(pc),
1407                                    0, XFLG_OLD_PREFIXES);
1408                         break;
1409
1410                 case OPT_INCLUDE:
1411                         parse_rule(&filter_list, poptGetOptArg(pc),
1412                                    FILTRULE_INCLUDE, XFLG_OLD_PREFIXES);
1413                         break;
1414
1415                 case OPT_EXCLUDE_FROM:
1416                 case OPT_INCLUDE_FROM:
1417                         arg = poptGetOptArg(pc);
1418                         if (sanitize_paths)
1419                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1420                         if (daemon_filter_list.head) {
1421                                 int rej;
1422                                 char *dir, *cp = strdup(arg);
1423                                 if (!cp)
1424                                         out_of_memory("parse_arguments");
1425                                 if (!*cp)
1426                                         goto options_rejected;
1427                                 dir = cp + (*cp == '/' ? module_dirlen : 0);
1428                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1429                                 rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1430                                 free(cp);
1431                                 if (rej)
1432                                         goto options_rejected;
1433                         }
1434                         parse_filter_file(&filter_list, arg,
1435                                 opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0,
1436                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1437                         break;
1438
1439                 case 'a':
1440                         if (refused_archive_part) {
1441                                 create_refuse_error(refused_archive_part);
1442                                 return 0;
1443                         }
1444                         if (!recurse) /* preserve recurse == 2 */
1445                                 recurse = 1;
1446 #ifdef SUPPORT_LINKS
1447                         preserve_links = 1;
1448 #endif
1449                         preserve_perms = 1;
1450                         preserve_times = 2;
1451                         preserve_gid = 1;
1452                         preserve_uid = 1;
1453                         preserve_devices = 1;
1454                         preserve_specials = 1;
1455                         break;
1456
1457                 case 'D':
1458                         preserve_devices = preserve_specials = 1;
1459                         break;
1460
1461                 case OPT_NO_D:
1462                         preserve_devices = preserve_specials = 0;
1463                         break;
1464
1465                 case 'h':
1466                         human_readable++;
1467                         break;
1468
1469                 case 'H':
1470                         preserve_hard_links++;
1471                         break;
1472
1473                 case 'i':
1474                         itemize_changes++;
1475                         break;
1476
1477                 case 'v':
1478                         verbose++;
1479                         break;
1480
1481                 case 'q':
1482                         quiet++;
1483                         break;
1484
1485                 case 'x':
1486                         one_file_system++;
1487                         break;
1488
1489                 case 'F':
1490                         switch (++F_option_cnt) {
1491                         case 1:
1492                                 parse_rule(&filter_list,": /.rsync-filter",0,0);
1493                                 break;
1494                         case 2:
1495                                 parse_rule(&filter_list,"- .rsync-filter",0,0);
1496                                 break;
1497                         }
1498                         break;
1499
1500                 case 'P':
1501                         if (refused_partial || refused_progress) {
1502                                 create_refuse_error(refused_partial
1503                                     ? refused_partial : refused_progress);
1504                                 return 0;
1505                         }
1506                         do_progress = 1;
1507                         keep_partial = 1;
1508                         break;
1509
1510                 case 'z':
1511                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1512                          || def_compress_level > Z_BEST_COMPRESSION) {
1513                                 snprintf(err_buf, sizeof err_buf,
1514                                         "--compress-level value is invalid: %d\n",
1515                                         def_compress_level);
1516                                 return 0;
1517                         }
1518                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1519                         if (do_compression && refused_compress) {
1520                                 create_refuse_error(refused_compress);
1521                                 return 0;
1522                         }
1523                         break;
1524
1525                 case 'M':
1526                         arg = poptGetOptArg(pc);
1527                         if (*arg != '-') {
1528                                 snprintf(err_buf, sizeof err_buf,
1529                                         "Remote option must start with a dash: %s\n", arg);
1530                                 return 0;
1531                         }
1532                         if (remote_option_cnt+2 >= remote_option_alloc) {
1533                                 remote_option_alloc += 16;
1534                                 remote_options = realloc_array(remote_options,
1535                                                         const char *, remote_option_alloc);
1536                                 if (!remote_options)
1537                                         out_of_memory("parse_arguments");
1538                                 if (!remote_option_cnt)
1539                                         remote_options[0] = "ARG0";
1540                         }
1541                         remote_options[++remote_option_cnt] = arg;
1542                         remote_options[remote_option_cnt+1] = NULL;
1543                         break;
1544
1545                 case OPT_WRITE_BATCH:
1546                         /* batch_name is already set */
1547                         write_batch = 1;
1548                         break;
1549
1550                 case OPT_ONLY_WRITE_BATCH:
1551                         /* batch_name is already set */
1552                         write_batch = -1;
1553                         break;
1554
1555                 case OPT_READ_BATCH:
1556                         /* batch_name is already set */
1557                         read_batch = 1;
1558                         break;
1559
1560                 case OPT_NO_ICONV:
1561 #ifdef ICONV_OPTION
1562                         iconv_opt = NULL;
1563 #endif
1564                         break;
1565
1566                 case OPT_MAX_SIZE:
1567                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
1568                                 snprintf(err_buf, sizeof err_buf,
1569                                         "--max-size value is invalid: %s\n",
1570                                         max_size_arg);
1571                                 return 0;
1572                         }
1573                         break;
1574
1575                 case OPT_MIN_SIZE:
1576                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
1577                                 snprintf(err_buf, sizeof err_buf,
1578                                         "--min-size value is invalid: %s\n",
1579                                         min_size_arg);
1580                                 return 0;
1581                         }
1582                         break;
1583
1584                 case OPT_APPEND:
1585                         if (am_server)
1586                                 append_mode++;
1587                         else
1588                                 append_mode = 1;
1589                         break;
1590
1591                 case OPT_LINK_DEST:
1592 #ifdef SUPPORT_HARD_LINKS
1593                         link_dest = 1;
1594                         dest_option = "--link-dest";
1595                         goto set_dest_dir;
1596 #else
1597                         snprintf(err_buf, sizeof err_buf,
1598                                  "hard links are not supported on this %s\n",
1599                                  am_server ? "server" : "client");
1600                         return 0;
1601 #endif
1602
1603                 case OPT_COPY_DEST:
1604                         copy_dest = 1;
1605                         dest_option = "--copy-dest";
1606                         goto set_dest_dir;
1607
1608                 case OPT_COMPARE_DEST:
1609                         compare_dest = 1;
1610                         dest_option = "--compare-dest";
1611                 set_dest_dir:
1612                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1613                                 snprintf(err_buf, sizeof err_buf,
1614                                         "ERROR: at most %d %s args may be specified\n",
1615                                         MAX_BASIS_DIRS, dest_option);
1616                                 return 0;
1617                         }
1618                         /* We defer sanitizing this arg until we know what
1619                          * our destination directory is going to be. */
1620                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1621                         break;
1622
1623                 case OPT_CHMOD:
1624                         arg = poptGetOptArg(pc);
1625                         if (!parse_chmod(arg, &chmod_modes)) {
1626                                 snprintf(err_buf, sizeof err_buf,
1627                                     "Invalid argument passed to --chmod (%s)\n",
1628                                     arg);
1629                                 return 0;
1630                         }
1631                         break;
1632
1633                 case OPT_INFO:
1634                         arg = poptGetOptArg(pc);
1635                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1636                         break;
1637
1638                 case OPT_DEBUG:
1639                         arg = poptGetOptArg(pc);
1640                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1641                         break;
1642
1643                 case OPT_USERMAP:
1644                         if (usermap) {
1645                                 if (usermap_via_chown) {
1646                                         snprintf(err_buf, sizeof err_buf,
1647                                             "--usermap conflicts with prior --chown.\n");
1648                                         return 0;
1649                                 }
1650                                 snprintf(err_buf, sizeof err_buf,
1651                                     "You can only specify --usermap once.\n");
1652                                 return 0;
1653                         }
1654                         usermap = (char *)poptGetOptArg(pc);
1655                         usermap_via_chown = False;
1656                         break;
1657
1658                 case OPT_GROUPMAP:
1659                         if (groupmap) {
1660                                 if (groupmap_via_chown) {
1661                                         snprintf(err_buf, sizeof err_buf,
1662                                             "--groupmap conflicts with prior --chown.\n");
1663                                         return 0;
1664                                 }
1665                                 snprintf(err_buf, sizeof err_buf,
1666                                     "You can only specify --groupmap once.\n");
1667                                 return 0;
1668                         }
1669                         groupmap = (char *)poptGetOptArg(pc);
1670                         groupmap_via_chown = False;
1671                         break;
1672
1673                 case OPT_CHOWN: {
1674                         const char *chown = poptGetOptArg(pc);
1675                         int len;
1676                         if ((arg = strchr(chown, ':')) != NULL)
1677                                 len = arg++ - chown;
1678                         else
1679                                 len = strlen(chown);
1680                         if (len) {
1681                                 if (usermap) {
1682                                         if (!usermap_via_chown) {
1683                                                 snprintf(err_buf, sizeof err_buf,
1684                                                     "--chown conflicts with prior --usermap.\n");
1685                                                 return 0;
1686                                         }
1687                                         snprintf(err_buf, sizeof err_buf,
1688                                             "You can only specify a user-affecting --chown once.\n");
1689                                         return 0;
1690                                 }
1691                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1692                                         out_of_memory("parse_arguments");
1693                                 usermap_via_chown = True;
1694                         }
1695                         if (arg && *arg) {
1696                                 if (groupmap) {
1697                                         if (!groupmap_via_chown) {
1698                                                 snprintf(err_buf, sizeof err_buf,
1699                                                     "--chown conflicts with prior --groupmap.\n");
1700                                                 return 0;
1701                                         }
1702                                         snprintf(err_buf, sizeof err_buf,
1703                                             "You can only specify a group-affecting --chown once.\n");
1704                                         return 0;
1705                                 }
1706                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1707                                         out_of_memory("parse_arguments");
1708                                 groupmap_via_chown = True;
1709                         }
1710                         break;
1711                 }
1712
1713                 case OPT_HELP:
1714                         usage(FINFO);
1715                         exit_cleanup(0);
1716
1717                 case 'A':
1718 #ifdef SUPPORT_ACLS
1719                         preserve_acls = 1;
1720                         preserve_perms = 1;
1721                         break;
1722 #else
1723                         /* FIXME: this should probably be ignored with a
1724                          * warning and then countermeasures taken to
1725                          * restrict group and other access in the presence
1726                          * of any more restrictive ACLs, but this is safe
1727                          * for now */
1728                         snprintf(err_buf,sizeof(err_buf),
1729                                  "ACLs are not supported on this %s\n",
1730                                  am_server ? "server" : "client");
1731                         return 0;
1732 #endif
1733
1734                 case 'X':
1735 #ifdef SUPPORT_XATTRS
1736                         preserve_xattrs++;
1737                         break;
1738 #else
1739                         snprintf(err_buf,sizeof(err_buf),
1740                                  "extended attributes are not supported on this %s\n",
1741                                  am_server ? "server" : "client");
1742                         return 0;
1743 #endif
1744
1745                 default:
1746                         /* A large opt value means that set_refuse_options()
1747                          * turned this option off. */
1748                         if (opt >= OPT_REFUSED_BASE) {
1749                                 create_refuse_error(opt);
1750                                 return 0;
1751                         }
1752                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1753                                  am_server ? "on remote machine: " : "",
1754                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1755                                  poptStrerror(opt));
1756                         return 0;
1757                 }
1758         }
1759
1760         if (human_readable > 1 && argc == 2 && !am_server) {
1761                 /* Allow the old meaning of 'h' (--help) on its own. */
1762                 usage(FINFO);
1763                 exit_cleanup(0);
1764         }
1765
1766         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1767
1768         if (do_stats) {
1769                 parse_output_words(info_words, info_levels,
1770                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1771         }
1772
1773         if (human_readable) {
1774                 char buf[32];
1775                 snprintf(buf, sizeof buf, "%f", 3.14);
1776                 if (strchr(buf, '.') != NULL)
1777                         number_separator = ',';
1778                 else
1779                         number_separator = '.';
1780         }
1781
1782 #ifdef ICONV_OPTION
1783         if (iconv_opt && protect_args != 2) {
1784                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1785                         iconv_opt = NULL;
1786                 else
1787                         need_unsorted_flist = 1;
1788         }
1789         if (refused_no_iconv && !iconv_opt) {
1790                 create_refuse_error(refused_no_iconv);
1791                 return 0;
1792         }
1793 #endif
1794
1795         if (protect_args == 1 && am_server)
1796                 return 1;
1797
1798         *argv_p = argv = poptGetArgs(pc);
1799         *argc_p = argc = count_args(argv);
1800
1801 #ifndef SUPPORT_LINKS
1802         if (preserve_links && !am_sender) {
1803                 snprintf(err_buf, sizeof err_buf,
1804                          "symlinks are not supported on this %s\n",
1805                          am_server ? "server" : "client");
1806                 return 0;
1807         }
1808 #endif
1809
1810 #ifndef SUPPORT_HARD_LINKS
1811         if (preserve_hard_links) {
1812                 snprintf(err_buf, sizeof err_buf,
1813                          "hard links are not supported on this %s\n",
1814                          am_server ? "server" : "client");
1815                 return 0;
1816         }
1817 #endif
1818
1819 #ifdef SUPPORT_XATTRS
1820         if (am_root < 0 && preserve_xattrs > 1) {
1821                 snprintf(err_buf, sizeof err_buf,
1822                          "--fake-super conflicts with -XX\n");
1823                 return 0;
1824         }
1825 #else
1826         if (am_root < 0) {
1827                 snprintf(err_buf, sizeof err_buf,
1828                          "--fake-super requires an rsync with extended attributes enabled\n");
1829                 return 0;
1830         }
1831 #endif
1832
1833         if (write_batch && read_batch) {
1834                 snprintf(err_buf, sizeof err_buf,
1835                         "--write-batch and --read-batch can not be used together\n");
1836                 return 0;
1837         }
1838         if (write_batch > 0 || read_batch) {
1839                 if (am_server) {
1840                         rprintf(FINFO,
1841                                 "ignoring --%s-batch option sent to server\n",
1842                                 write_batch ? "write" : "read");
1843                         /* We don't actually exit_cleanup(), so that we can
1844                          * still service older version clients that still send
1845                          * batch args to server. */
1846                         read_batch = write_batch = 0;
1847                         batch_name = NULL;
1848                 } else if (dry_run)
1849                         write_batch = 0;
1850         } else if (write_batch < 0 && dry_run)
1851                 write_batch = 0;
1852         if (read_batch && files_from) {
1853                 snprintf(err_buf, sizeof err_buf,
1854                         "--read-batch cannot be used with --files-from\n");
1855                 return 0;
1856         }
1857         if (read_batch && remove_source_files) {
1858                 snprintf(err_buf, sizeof err_buf,
1859                         "--read-batch cannot be used with --remove-%s-files\n",
1860                         remove_source_files == 1 ? "source" : "sent");
1861                 return 0;
1862         }
1863         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1864                 snprintf(err_buf, sizeof err_buf,
1865                         "the batch-file name must be %d characters or less.\n",
1866                         MAX_BATCH_NAME_LEN);
1867                 return 0;
1868         }
1869
1870         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1871                 snprintf(err_buf, sizeof err_buf,
1872                          "the --temp-dir path is WAY too long.\n");
1873                 return 0;
1874         }
1875
1876         if (max_delete < 0 && max_delete != INT_MIN) {
1877                 /* Negative numbers are treated as "no deletions". */
1878                 max_delete = 0;
1879         }
1880
1881         if (compare_dest + copy_dest + link_dest > 1) {
1882                 snprintf(err_buf, sizeof err_buf,
1883                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1884                 return 0;
1885         }
1886
1887         if (files_from) {
1888                 if (recurse == 1) /* preserve recurse == 2 */
1889                         recurse = 0;
1890                 if (xfer_dirs < 0)
1891                         xfer_dirs = 1;
1892         }
1893
1894         if (argc < 2 && !read_batch && !am_server)
1895                 list_only |= 1;
1896
1897         if (xfer_dirs >= 4) {
1898                 parse_rule(&filter_list, "- /*/*", 0, 0);
1899                 recurse = xfer_dirs = 1;
1900         } else if (recurse)
1901                 xfer_dirs = 1;
1902         else if (xfer_dirs < 0)
1903                 xfer_dirs = list_only ? 1 : 0;
1904
1905         if (relative_paths < 0)
1906                 relative_paths = files_from? 1 : 0;
1907         if (!relative_paths)
1908                 implied_dirs = 0;
1909
1910         if (delete_before + !!delete_during + delete_after > 1) {
1911                 snprintf(err_buf, sizeof err_buf,
1912                         "You may not combine multiple --delete-WHEN options.\n");
1913                 return 0;
1914         }
1915         if (delete_before || delete_during || delete_after)
1916                 delete_mode = 1;
1917         else if (delete_mode || delete_excluded) {
1918                 /* Only choose now between before & during if one is refused. */
1919                 if (refused_delete_before) {
1920                         if (!refused_delete_during)
1921                                 delete_during = 1;
1922                         else {
1923                                 create_refuse_error(refused_delete_before);
1924                                 return 0;
1925                         }
1926                 } else if (refused_delete_during)
1927                         delete_before = 1;
1928                 delete_mode = 1;
1929         }
1930         if (!xfer_dirs && delete_mode) {
1931                 snprintf(err_buf, sizeof err_buf,
1932                         "--delete does not work without -r or -d.\n");
1933                 return 0;
1934         }
1935
1936         if (missing_args == 3) /* simplify if both options were specified */
1937                 missing_args = 2;
1938         if (refused_delete && (delete_mode || missing_args == 2)) {
1939                 create_refuse_error(refused_delete);
1940                 return 0;
1941         }
1942
1943         if (remove_source_files) {
1944                 /* We only want to infer this refusal of --remove-source-files
1945                  * via the refusal of "delete", not any of the "delete-FOO"
1946                  * options. */
1947                 if (refused_delete && am_sender) {
1948                         create_refuse_error(refused_delete);
1949                         return 0;
1950                 }
1951                 need_messages_from_generator = 1;
1952         }
1953
1954         if (munge_symlinks && !am_daemon) {
1955                 STRUCT_STAT st;
1956                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
1957                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
1958                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
1959                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
1960                                 prefix);
1961                         exit_cleanup(RERR_UNSUPPORTED);
1962                 }
1963         }
1964
1965         if (sanitize_paths) {
1966                 int i;
1967                 for (i = argc; i-- > 0; )
1968                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
1969                 if (tmpdir)
1970                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
1971                 if (backup_dir)
1972                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
1973         }
1974         if (daemon_filter_list.head && !am_sender) {
1975                 filter_rule_list *elp = &daemon_filter_list;
1976                 if (tmpdir) {
1977                         char *dir;
1978                         if (!*tmpdir)
1979                                 goto options_rejected;
1980                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
1981                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1982                         if (check_filter(elp, FLOG, dir, 1) < 0)
1983                                 goto options_rejected;
1984                 }
1985                 if (backup_dir) {
1986                         char *dir;
1987                         if (!*backup_dir)
1988                                 goto options_rejected;
1989                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
1990                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1991                         if (check_filter(elp, FLOG, dir, 1) < 0)
1992                                 goto options_rejected;
1993                 }
1994         }
1995
1996         if (!backup_suffix)
1997                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
1998         backup_suffix_len = strlen(backup_suffix);
1999         if (strchr(backup_suffix, '/') != NULL) {
2000                 snprintf(err_buf, sizeof err_buf,
2001                         "--suffix cannot contain slashes: %s\n",
2002                         backup_suffix);
2003                 return 0;
2004         }
2005         if (backup_dir) {
2006                 while (*backup_dir == '.' && backup_dir[1] == '/')
2007                         backup_dir += 2;
2008                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2009                         backup_dir++;
2010                 backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2011                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2012                 if (backup_dir_remainder < 128) {
2013                         snprintf(err_buf, sizeof err_buf,
2014                                 "the --backup-dir path is WAY too long.\n");
2015                         return 0;
2016                 }
2017                 if (!backup_dir_len) {
2018                         backup_dir_len = -1;
2019                         backup_dir = NULL;
2020                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2021                         backup_dir_buf[backup_dir_len++] = '/';
2022                         backup_dir_buf[backup_dir_len] = '\0';
2023                 }
2024         }
2025         if (backup_dir) {
2026                 /* No need for a suffix or a protect rule. */
2027         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2028                 snprintf(err_buf, sizeof err_buf,
2029                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2030                         ? "when --backup-dir is the same as the dest dir"
2031                         : "without a --backup-dir");
2032                 return 0;
2033         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2034                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2035                         "P *%s", backup_suffix);
2036                 parse_rule(&filter_list, backup_dir_buf, 0, 0);
2037         }
2038
2039         if (make_backups && !backup_dir) {
2040                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2041                 if (preserve_times > 1)
2042                         preserve_times = 1;
2043         } else if (omit_dir_times) {
2044                 if (preserve_times > 1)
2045                         preserve_times = 1;
2046         }
2047
2048         if (stdout_format) {
2049                 if (am_server && log_format_has(stdout_format, 'I'))
2050                         stdout_format_has_i = 2;
2051                 else if (log_format_has(stdout_format, 'i'))
2052                         stdout_format_has_i = itemize_changes | 1;
2053                 if (!log_format_has(stdout_format, 'b')
2054                  && !log_format_has(stdout_format, 'c')
2055                  && !log_format_has(stdout_format, 'C'))
2056                         log_before_transfer = !am_server;
2057         } else if (itemize_changes) {
2058                 stdout_format = "%i %n%L";
2059                 stdout_format_has_i = itemize_changes;
2060                 log_before_transfer = !am_server;
2061         }
2062
2063         if (do_progress && !am_server) {
2064                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2065                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2066                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2067         }
2068
2069         if (dry_run)
2070                 do_xfers = 0;
2071
2072         set_io_timeout(io_timeout);
2073
2074         if (INFO_GTE(NAME, 1) && !stdout_format) {
2075                 stdout_format = "%n%L";
2076                 log_before_transfer = !am_server;
2077         }
2078         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2079                 stdout_format_has_o_or_i = 1;
2080
2081         if (logfile_name && !am_daemon) {
2082                 if (!logfile_format) {
2083                         logfile_format = "%i %n%L";
2084                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2085                 } else {
2086                         if (log_format_has(logfile_format, 'i'))
2087                                 logfile_format_has_i = 1;
2088                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2089                                 logfile_format_has_o_or_i = 1;
2090                 }
2091                 log_init(0);
2092         } else if (!am_daemon)
2093                 logfile_format = NULL;
2094
2095         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2096                 bwlimit = daemon_bwlimit;
2097         if (bwlimit) {
2098                 bwlimit_writemax = (size_t)bwlimit * 128;
2099                 if (bwlimit_writemax < 512)
2100                         bwlimit_writemax = 512;
2101         }
2102
2103         if (sparse_files && inplace) {
2104                 /* Note: we don't check for this below, because --append is
2105                  * OK with --sparse (as long as redos are handled right). */
2106                 snprintf(err_buf, sizeof err_buf,
2107                          "--sparse cannot be used with --inplace\n");
2108                 return 0;
2109         }
2110
2111         if (append_mode) {
2112                 if (whole_file > 0) {
2113                         snprintf(err_buf, sizeof err_buf,
2114                                  "--append cannot be used with --whole-file\n");
2115                         return 0;
2116                 }
2117                 if (refused_inplace) {
2118                         create_refuse_error(refused_inplace);
2119                         return 0;
2120                 }
2121                 inplace = 1;
2122         }
2123
2124         if (delay_updates && !partial_dir)
2125                 partial_dir = tmp_partialdir;
2126
2127         if (inplace) {
2128 #ifdef HAVE_FTRUNCATE
2129                 if (partial_dir) {
2130                         snprintf(err_buf, sizeof err_buf,
2131                                  "--%s cannot be used with --%s\n",
2132                                  append_mode ? "append" : "inplace",
2133                                  delay_updates ? "delay-updates" : "partial-dir");
2134                         return 0;
2135                 }
2136                 /* --inplace implies --partial for refusal purposes, but we
2137                  * clear the keep_partial flag for internal logic purposes. */
2138                 if (refused_partial) {
2139                         create_refuse_error(refused_partial);
2140                         return 0;
2141                 }
2142                 keep_partial = 0;
2143 #else
2144                 snprintf(err_buf, sizeof err_buf,
2145                          "--%s is not supported on this %s\n",
2146                          append_mode ? "append" : "inplace",
2147                          am_server ? "server" : "client");
2148                 return 0;
2149 #endif
2150         } else {
2151                 if (keep_partial && !partial_dir && !am_server) {
2152                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2153                                 partial_dir = strdup(arg);
2154                 }
2155                 if (partial_dir) {
2156                         if (*partial_dir)
2157                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2158                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2159                                 partial_dir = NULL;
2160                         if (!partial_dir && refused_partial) {
2161                                 create_refuse_error(refused_partial);
2162                                 return 0;
2163                         }
2164                         keep_partial = 1;
2165                 }
2166         }
2167
2168         if (files_from) {
2169                 char *h, *p;
2170                 int q;
2171                 if (argc > 2 || (!am_daemon && argc == 1)) {
2172                         usage(FERROR);
2173                         exit_cleanup(RERR_SYNTAX);
2174                 }
2175                 if (strcmp(files_from, "-") == 0) {
2176                         filesfrom_fd = 0;
2177                         if (am_server)
2178                                 filesfrom_host = ""; /* reading from socket */
2179                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2180                         if (am_server) {
2181                                 snprintf(err_buf, sizeof err_buf,
2182                                         "The --files-from sent to the server cannot specify a host.\n");
2183                                 return 0;
2184                         }
2185                         files_from = p;
2186                         filesfrom_host = h;
2187                         if (strcmp(files_from, "-") == 0) {
2188                                 snprintf(err_buf, sizeof err_buf,
2189                                         "Invalid --files-from remote filename\n");
2190                                 return 0;
2191                         }
2192                 } else {
2193                         if (sanitize_paths)
2194                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2195                         if (daemon_filter_list.head) {
2196                                 char *dir;
2197                                 if (!*files_from)
2198                                         goto options_rejected;
2199                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2200                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2201                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2202                                         goto options_rejected;
2203                         }
2204                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2205                         if (filesfrom_fd < 0) {
2206                                 snprintf(err_buf, sizeof err_buf,
2207                                         "failed to open files-from file %s: %s\n",
2208                                         files_from, strerror(errno));
2209                                 return 0;
2210                         }
2211                 }
2212         }
2213
2214         am_starting_up = 0;
2215
2216         return 1;
2217
2218   options_rejected:
2219         snprintf(err_buf, sizeof err_buf,
2220                 "Your options have been rejected by the server.\n");
2221         return 0;
2222 }
2223
2224
2225 /**
2226  * Construct a filtered list of options to pass through from the
2227  * client to the server.
2228  *
2229  * This involves setting options that will tell the server how to
2230  * behave, and also filtering out options that are processed only
2231  * locally.
2232  **/
2233 void server_options(char **args, int *argc_p)
2234 {
2235         static char argstr[64];
2236         int ac = *argc_p;
2237         uchar where;
2238         char *arg;
2239         int i, x;
2240
2241         /* This should always remain first on the server's command-line. */
2242         args[ac++] = "--server";
2243
2244         if (daemon_over_rsh > 0) {
2245                 args[ac++] = "--daemon";
2246                 *argc_p = ac;
2247                 /* if we're passing --daemon, we're done */
2248                 return;
2249         }
2250
2251         if (!am_sender)
2252                 args[ac++] = "--sender";
2253
2254         x = 1;
2255         argstr[0] = '-';
2256
2257         if (protect_args)
2258                 argstr[x++] = 's';
2259
2260         for (i = 0; i < verbose; i++)
2261                 argstr[x++] = 'v';
2262
2263         /* the -q option is intentionally left out */
2264         if (make_backups)
2265                 argstr[x++] = 'b';
2266         if (update_only)
2267                 argstr[x++] = 'u';
2268         if (!do_xfers) /* Note: NOT "dry_run"! */
2269                 argstr[x++] = 'n';
2270         if (preserve_links)
2271                 argstr[x++] = 'l';
2272         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2273          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2274                 argstr[x++] = 'd';
2275         if (am_sender) {
2276                 if (keep_dirlinks)
2277                         argstr[x++] = 'K';
2278                 if (prune_empty_dirs)
2279                         argstr[x++] = 'm';
2280                 if (omit_dir_times)
2281                         argstr[x++] = 'O';
2282         } else {
2283                 if (copy_links)
2284                         argstr[x++] = 'L';
2285                 if (copy_dirlinks)
2286                         argstr[x++] = 'k';
2287         }
2288
2289         if (whole_file > 0)
2290                 argstr[x++] = 'W';
2291         /* We don't need to send --no-whole-file, because it's the
2292          * default for remote transfers, and in any case old versions
2293          * of rsync will not understand it. */
2294
2295         if (preserve_hard_links) {
2296                 argstr[x++] = 'H';
2297                 if (preserve_hard_links > 1)
2298                         argstr[x++] = 'H';
2299         }
2300         if (preserve_uid)
2301                 argstr[x++] = 'o';
2302         if (preserve_gid)
2303                 argstr[x++] = 'g';
2304         if (preserve_devices) /* ignore preserve_specials here */
2305                 argstr[x++] = 'D';
2306         if (preserve_times)
2307                 argstr[x++] = 't';
2308         if (preserve_perms)
2309                 argstr[x++] = 'p';
2310         else if (preserve_executability && am_sender)
2311                 argstr[x++] = 'E';
2312 #ifdef SUPPORT_ACLS
2313         if (preserve_acls)
2314                 argstr[x++] = 'A';
2315 #endif
2316 #ifdef SUPPORT_XATTRS
2317         if (preserve_xattrs) {
2318                 argstr[x++] = 'X';
2319                 if (preserve_xattrs > 1)
2320                         argstr[x++] = 'X';
2321         }
2322 #endif
2323         if (recurse)
2324                 argstr[x++] = 'r';
2325         if (always_checksum)
2326                 argstr[x++] = 'c';
2327         if (cvs_exclude)
2328                 argstr[x++] = 'C';
2329         if (ignore_times)
2330                 argstr[x++] = 'I';
2331         if (relative_paths)
2332                 argstr[x++] = 'R';
2333         if (one_file_system) {
2334                 argstr[x++] = 'x';
2335                 if (one_file_system > 1)
2336                         argstr[x++] = 'x';
2337         }
2338         if (sparse_files)
2339                 argstr[x++] = 'S';
2340         if (do_compression)
2341                 argstr[x++] = 'z';
2342
2343         set_allow_inc_recurse();
2344
2345         /* Checking the pre-negotiated value allows --protocol=29 override. */
2346         if (protocol_version >= 30) {
2347                 /* We make use of the -e option to let the server know about
2348                  * any pre-release protocol version && some behavior flags. */
2349                 argstr[x++] = 'e';
2350 #if SUBPROTOCOL_VERSION != 0
2351                 if (protocol_version == PROTOCOL_VERSION) {
2352                         x += snprintf(argstr+x, sizeof argstr - x,
2353                                       "%d.%d",
2354                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2355                 } else
2356 #endif
2357                         argstr[x++] = '.';
2358                 if (allow_inc_recurse)
2359                         argstr[x++] = 'i';
2360 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
2361                 argstr[x++] = 'L';
2362 #endif
2363 #ifdef ICONV_OPTION
2364                 argstr[x++] = 's';
2365 #endif
2366         }
2367
2368         if (x >= (int)sizeof argstr) { /* Not possible... */
2369                 rprintf(FERROR, "argstr overflow in server_options().\n");
2370                 exit_cleanup(RERR_MALLOC);
2371         }
2372
2373         argstr[x] = '\0';
2374
2375         if (x > 1)
2376                 args[ac++] = argstr;
2377
2378 #ifdef ICONV_OPTION
2379         if (iconv_opt) {
2380                 char *set = strchr(iconv_opt, ',');
2381                 if (set)
2382                         set++;
2383                 else
2384                         set = iconv_opt;
2385                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2386                         goto oom;
2387                 args[ac++] = arg;
2388         }
2389 #endif
2390
2391         if (protect_args && !local_server) /* unprotected args stop here */
2392                 args[ac++] = NULL;
2393
2394         if (list_only > 1)
2395                 args[ac++] = "--list-only";
2396
2397         /* This makes sure that the remote rsync can handle deleting with -d
2398          * sans -r because the --no-r option was added at the same time. */
2399         if (xfer_dirs && !recurse && delete_mode && am_sender)
2400                 args[ac++] = "--no-r";
2401
2402         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2403                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2404                         goto oom;
2405                 args[ac++] = arg;
2406         }
2407
2408         if (preserve_devices) {
2409                 /* Note: sending "--devices" would not be backward-compatible. */
2410                 if (!preserve_specials)
2411                         args[ac++] = "--no-specials"; /* -D is already set. */
2412         } else if (preserve_specials)
2413                 args[ac++] = "--specials";
2414
2415         /* The server side doesn't use our log-format, but in certain
2416          * circumstances they need to know a little about the option. */
2417         if (stdout_format && am_sender) {
2418                 /* Use --log-format, not --out-format, for compatibility. */
2419                 if (stdout_format_has_i > 1)
2420                         args[ac++] = "--log-format=%i%I";
2421                 else if (stdout_format_has_i)
2422                         args[ac++] = "--log-format=%i";
2423                 else if (stdout_format_has_o_or_i)
2424                         args[ac++] = "--log-format=%o";
2425                 else if (!verbose)
2426                         args[ac++] = "--log-format=X";
2427         }
2428
2429         if (block_size) {
2430                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2431                         goto oom;
2432                 args[ac++] = arg;
2433         }
2434
2435         if (io_timeout) {
2436                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2437                         goto oom;
2438                 args[ac++] = arg;
2439         }
2440
2441         if (bwlimit) {
2442                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2443                         goto oom;
2444                 args[ac++] = arg;
2445         }
2446
2447         if (backup_dir) {
2448                 args[ac++] = "--backup-dir";
2449                 args[ac++] = backup_dir;
2450         }
2451
2452         /* Only send --suffix if it specifies a non-default value. */
2453         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2454                 /* We use the following syntax to avoid weirdness with '~'. */
2455                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2456                         goto oom;
2457                 args[ac++] = arg;
2458         }
2459
2460         if (am_sender) {
2461                 if (max_delete > 0) {
2462                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2463                                 goto oom;
2464                         args[ac++] = arg;
2465                 } else if (max_delete == 0)
2466                         args[ac++] = "--max-delete=-1";
2467                 if (min_size) {
2468                         args[ac++] = "--min-size";
2469                         args[ac++] = min_size_arg;
2470                 }
2471                 if (max_size) {
2472                         args[ac++] = "--max-size";
2473                         args[ac++] = max_size_arg;
2474                 }
2475                 if (delete_before)
2476                         args[ac++] = "--delete-before";
2477                 else if (delete_during == 2)
2478                         args[ac++] = "--delete-delay";
2479                 else if (delete_during)
2480                         args[ac++] = "--delete-during";
2481                 else if (delete_after)
2482                         args[ac++] = "--delete-after";
2483                 else if (delete_mode && !delete_excluded)
2484                         args[ac++] = "--delete";
2485                 if (delete_excluded)
2486                         args[ac++] = "--delete-excluded";
2487                 if (force_delete)
2488                         args[ac++] = "--force";
2489                 if (write_batch < 0)
2490                         args[ac++] = "--only-write-batch=X";
2491                 if (am_root > 1)
2492                         args[ac++] = "--super";
2493                 if (size_only)
2494                         args[ac++] = "--size-only";
2495                 if (do_stats)
2496                         args[ac++] = "--stats";
2497         } else {
2498                 if (skip_compress) {
2499                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2500                                 goto oom;
2501                         args[ac++] = arg;
2502                 }
2503         }
2504
2505         /* --delete-missing-args needs the cooperation of both sides, but
2506          * the sender can handle --ignore-missing-args by itself. */
2507         if (missing_args == 2)
2508                 args[ac++] = "--delete-missing-args";
2509         else if (missing_args == 1 && !am_sender)
2510                 args[ac++] = "--ignore-missing-args";
2511
2512         if (modify_window_set) {
2513                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
2514                         goto oom;
2515                 args[ac++] = arg;
2516         }
2517
2518         if (checksum_seed) {
2519                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2520                         goto oom;
2521                 args[ac++] = arg;
2522         }
2523
2524         if (partial_dir && am_sender) {
2525                 if (partial_dir != tmp_partialdir) {
2526                         args[ac++] = "--partial-dir";
2527                         args[ac++] = partial_dir;
2528                 }
2529                 if (delay_updates)
2530                         args[ac++] = "--delay-updates";
2531         } else if (keep_partial && am_sender)
2532                 args[ac++] = "--partial";
2533
2534         if (ignore_errors)
2535                 args[ac++] = "--ignore-errors";
2536
2537         if (copy_unsafe_links)
2538                 args[ac++] = "--copy-unsafe-links";
2539
2540         if (safe_symlinks)
2541                 args[ac++] = "--safe-links";
2542
2543         if (numeric_ids)
2544                 args[ac++] = "--numeric-ids";
2545
2546         if (use_qsort)
2547                 args[ac++] = "--use-qsort";
2548
2549         if (am_sender) {
2550                 if (usermap) {
2551                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2552                                 goto oom;
2553                         args[ac++] = arg;
2554                 }
2555
2556                 if (groupmap) {
2557                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2558                                 goto oom;
2559                         args[ac++] = arg;
2560                 }
2561
2562                 if (ignore_existing)
2563                         args[ac++] = "--ignore-existing";
2564
2565                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2566                 if (ignore_non_existing)
2567                         args[ac++] = "--existing";
2568
2569                 if (tmpdir) {
2570                         args[ac++] = "--temp-dir";
2571                         args[ac++] = tmpdir;
2572                 }
2573
2574                 if (basis_dir[0]) {
2575                         /* the server only needs this option if it is not the sender,
2576                          *   and it may be an older version that doesn't know this
2577                          *   option, so don't send it if client is the sender.
2578                          */
2579                         for (i = 0; i < basis_dir_cnt; i++) {
2580                                 args[ac++] = dest_option;
2581                                 args[ac++] = basis_dir[i];
2582                         }
2583                 }
2584         }
2585
2586         /* What flags do we need to send to the other side? */
2587         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2588         arg = make_output_option(info_words, info_levels, where);
2589         if (arg)
2590                 args[ac++] = arg;
2591
2592         arg = make_output_option(debug_words, debug_levels, where);
2593         if (arg)
2594                 args[ac++] = arg;
2595
2596         if (append_mode) {
2597                 if (append_mode > 1)
2598                         args[ac++] = "--append";
2599                 args[ac++] = "--append";
2600         } else if (inplace)
2601                 args[ac++] = "--inplace";
2602
2603         if (files_from && (!am_sender || filesfrom_host)) {
2604                 if (filesfrom_host) {
2605                         args[ac++] = "--files-from";
2606                         args[ac++] = files_from;
2607                         if (eol_nulls)
2608                                 args[ac++] = "--from0";
2609                 } else {
2610                         args[ac++] = "--files-from=-";
2611                         args[ac++] = "--from0";
2612                 }
2613                 if (!relative_paths)
2614                         args[ac++] = "--no-relative";
2615         }
2616         /* It's OK that this checks the upper-bound of the protocol_version. */
2617         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2618                 args[ac++] = "--no-implied-dirs";
2619
2620         if (fuzzy_basis && am_sender)
2621                 args[ac++] = "--fuzzy";
2622
2623         if (remove_source_files == 1)
2624                 args[ac++] = "--remove-source-files";
2625         else if (remove_source_files)
2626                 args[ac++] = "--remove-sent-files";
2627
2628         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2629                 rprintf(FERROR, "argc overflow in server_options().\n");
2630                 exit_cleanup(RERR_MALLOC);
2631         }
2632
2633         if (remote_option_cnt) {
2634                 int j;
2635                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2636                         rprintf(FERROR, "too many remote options specified.\n");
2637                         exit_cleanup(RERR_SYNTAX);
2638                 }
2639                 for (j = 1; j <= remote_option_cnt; j++)
2640                         args[ac++] = (char*)remote_options[j];
2641         }
2642
2643         *argc_p = ac;
2644         return;
2645
2646     oom:
2647         out_of_memory("server_options");
2648 }
2649
2650 /* If str points to a valid hostspec, return allocated memory containing the
2651  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2652  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2653  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2654  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2655  * (required for parsing) [ and ] chars elided from the returned string. */
2656 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2657 {
2658         char *s, *host_start = str;
2659         int hostlen = 0, userlen = 0;
2660         char *ret;
2661
2662         for (s = str; ; s++) {
2663                 if (!*s) {
2664                         /* It is only OK if we run out of string with rsync:// */
2665                         if (!port_ptr)
2666                                 return NULL;
2667                         if (!hostlen)
2668                                 hostlen = s - host_start;
2669                         break;
2670                 }
2671                 if (*s == ':' || *s == '/') {
2672                         if (!hostlen)
2673                                 hostlen = s - host_start;
2674                         if (*s++ == '/') {
2675                                 if (!port_ptr)
2676                                         return NULL;
2677                         } else if (port_ptr) {
2678                                 *port_ptr = atoi(s);
2679                                 while (isDigit(s)) s++;
2680                                 if (*s && *s++ != '/')
2681                                         return NULL;
2682                         }
2683                         break;
2684                 }
2685                 if (*s == '@') {
2686                         userlen = s - str + 1;
2687                         host_start = s + 1;
2688                 } else if (*s == '[') {
2689                         if (s != host_start++)
2690                                 return NULL;
2691                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2692                         hostlen = s - host_start;
2693                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2694                                 return NULL;
2695                 }
2696         }
2697
2698         *path_start_ptr = s;
2699         ret = new_array(char, userlen + hostlen + 1);
2700         if (userlen)
2701                 strlcpy(ret, str, userlen + 1);
2702         strlcpy(ret + userlen, host_start, hostlen + 1);
2703         return ret;
2704 }
2705
2706 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2707  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2708  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2709  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2710  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2711  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2712  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2713 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2714 {
2715         char *path;
2716
2717         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2718                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2719                 if (*host_ptr) {
2720                         if (!*port_ptr)
2721                                 *port_ptr = RSYNC_PORT;
2722                         return path;
2723                 }
2724         }
2725
2726         *host_ptr = parse_hostspec(s, &path, NULL);
2727         if (!*host_ptr)
2728                 return NULL;
2729
2730         if (*path == ':') {
2731                 if (port_ptr && !*port_ptr)
2732                         *port_ptr = RSYNC_PORT;
2733                 return path + 1;
2734         }
2735         if (port_ptr)
2736                 *port_ptr = 0;
2737
2738         return path;
2739 }