options.c

   1 /*  -*- c-file-style: "linux" -*-
   2
   3     Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
   4     Copyright (C) 2000-2001 by Martin Pool <mbp@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "rsync.h"
  22 #include "popt.h"
  23
  24 int make_backups = 0;
  25 int whole_file = 0;
  26 int copy_links = 0;
  27 int preserve_links = 0;
  28 int preserve_hard_links = 0;
  29 int preserve_perms = 0;
  30 int preserve_devices = 0;
  31 int preserve_uid = 0;
  32 int preserve_gid = 0;
  33 int preserve_times = 0;
  34 int update_only = 0;
  35 int cvs_exclude = 0;
  36 int dry_run=0;
  37 int local_server=0;
  38 int ignore_times=0;
  39 int delete_mode=0;
  40 int delete_excluded=0;
  41 int one_file_system=0;
  42 int remote_version=0;
  43 int sparse_files=0;
  44 int do_compression=0;
  45 int am_root=0;
  46 int orig_umask=0;
  47 int relative_paths=0;
  48 int numeric_ids = 0;
  49 int force_delete = 0;
  50 int io_timeout = 0;
  51 int io_error = 0;
  52 int read_only = 0;
  53 int module_id = -1;
  54 int am_server = 0;
  55 int am_sender=0;
  56 int recurse = 0;
  57 int am_daemon=0;
  58 int do_stats=0;
  59 int do_progress=0;
  60 int keep_partial=0;
  61 int safe_symlinks=0;
  62 int copy_unsafe_links=0;
  63 int block_size=BLOCK_SIZE;
  64 int size_only=0;
  65 int bwlimit=0;
  66 int delete_after=0;
  67 int only_existing=0;
  68 int max_delete=0;
  69 int ignore_errors=0;
  70 #ifdef _WIN32
  71 int modify_window=2;
  72 #else
  73 int modify_window=0;
  74 #endif
  75 int blocking_io=0;
  76
  77 char *backup_suffix = BACKUP_SUFFIX;
  78 char *tmpdir = NULL;
  79 char *compare_dest = NULL;
  80 char *config_file = RSYNCD_CONF;
  81 char *shell_cmd = NULL;
  82 char *log_format = NULL;
  83 char *password_file = NULL;
  84 char *rsync_path = RSYNC_PATH;
  85 char *backup_dir = NULL;
  86 int rsync_port = RSYNC_PORT;
  87
  88 int verbose = 0;
  89 int quiet = 0;
  90 int always_checksum = 0;
  91 int list_only = 0;
  92
  93 static int modify_window_set;
  94
  95
  96 struct in_addr socket_address = {INADDR_ANY};
  97
  98
  99 static void print_rsync_version(int f)
 100 {
 101         char const *got_socketpair = "no ";
 102         char const *hardlinks = "no ";
 103         char const *links = "no ";
 104
 105 #ifdef HAVE_SOCKETPAIR
 106         got_socketpair = "";
 107 #endif
 108
 109 #if SUPPORT_HARD_LINKS
 110         hardlinks = "";
 111 #endif
 112
 113 #if SUPPORT_LINKS
 114         links = "";
 115 #endif
 116
 117         rprintf(f, "%s  version %s  protocol version %d\n",
 118                 RSYNC_NAME, VERSION, PROTOCOL_VERSION);
 119         rprintf(f,
 120                 "Copyright (C) 1996-2001 by Andrew Tridgell, Paul Mackerras and others\n");
 121         rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, "
 122                 "%shard links, %ssymlinks\n\n",
 123                 sizeof(int64) * 8,
 124                 got_socketpair,
 125                 hardlinks, links);
 126
 127 #ifdef NO_INT64
 128         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 129 #endif
 130 }
 131
 132
 133 void usage(enum logcode F)
 134 {
 135   print_rsync_version(F);
 136
 137   rprintf(F,"rsync is a file transfer program capable of efficient remote update\nvia a fast differencing algorithm.\n\n");
 138
 139   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 140   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC DEST\n");
 141   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... DEST\n");
 142   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 143   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 144   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 145   rprintf(F,"SRC on single-colon remote HOST will be expanded by remote shell\n");
 146   rprintf(F,"SRC on server remote HOST may contain shell wildcards or multiple\n");
 147   rprintf(F,"  sources separated by space as long as they have same top-level\n");
 148   rprintf(F,"\nOptions\n");
 149   rprintf(F," -v, --verbose               increase verbosity\n");
 150   rprintf(F," -q, --quiet                 decrease verbosity\n");
 151   rprintf(F," -c, --checksum              always checksum\n");
 152   rprintf(F," -a, --archive               archive mode\n");
 153   rprintf(F," -r, --recursive             recurse into directories\n");
 154   rprintf(F," -R, --relative              use relative path names\n");
 155   rprintf(F," -b, --backup                make backups (default %s suffix)\n",BACKUP_SUFFIX);
 156   rprintf(F,"     --backup-dir            make backups into this directory\n");
 157   rprintf(F,"     --suffix=SUFFIX         override backup suffix\n");
 158   rprintf(F," -u, --update                update only (don't overwrite newer files)\n");
 159   rprintf(F," -l, --links                 preserve soft links\n");
 160   rprintf(F," -L, --copy-links            treat soft links like regular files\n");
 161   rprintf(F,"     --copy-unsafe-links     copy links outside the source tree\n");
 162   rprintf(F,"     --safe-links            ignore links outside the destination tree\n");
 163   rprintf(F," -H, --hard-links            preserve hard links\n");
 164   rprintf(F," -p, --perms                 preserve permissions\n");
 165   rprintf(F," -o, --owner                 preserve owner (root only)\n");
 166   rprintf(F," -g, --group                 preserve group\n");
 167   rprintf(F," -D, --devices               preserve devices (root only)\n");
 168   rprintf(F," -t, --times                 preserve times\n");
 169   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 170   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 171   rprintf(F," -W, --whole-file            copy whole files, no incremental checks\n");
 172   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 173   rprintf(F," -B, --block-size=SIZE       checksum blocking size (default %d)\n",BLOCK_SIZE);
 174   rprintf(F," -e, --rsh=COMMAND           specify rsh replacement\n");
 175   rprintf(F,"     --rsync-path=PATH       specify path to rsync on the remote machine\n");
 176   rprintf(F," -C, --cvs-exclude           auto ignore files in the same way CVS does\n");
 177   rprintf(F,"     --existing              only update files that already exist\n");
 178   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
 179   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
 180   rprintf(F,"     --delete-after          delete after transferring, not before\n");
 181   rprintf(F,"     --ignore-errors         delete even if there are IO errors\n");
 182   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 183   rprintf(F,"     --partial               keep partially transferred files\n");
 184   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 185   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 186   rprintf(F,"     --timeout=TIME          set IO timeout in seconds\n");
 187   rprintf(F," -I, --ignore-times          don't exclude files that match length and time\n");
 188   rprintf(F,"     --size-only             only use file size when determining if a file should be transferred\n");
 189   rprintf(F,"     --modify-window=NUM     Timestamp window (seconds) for file match (default=%d)\n",modify_window);
 190   rprintf(F," -T  --temp-dir=DIR          create temporary files in directory DIR\n");
 191   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 192   rprintf(F," -P                          equivalent to --partial --progress\n");
 193   rprintf(F," -z, --compress              compress file data\n");
 194   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 195   rprintf(F,"     --exclude-from=FILE     exclude patterns listed in FILE\n");
 196   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 197   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
 198   rprintf(F,"     --version               print version number\n");
 199   rprintf(F,"     --daemon                run as a rsync daemon\n");
 200   rprintf(F,"     --address               bind to the specified address\n");
 201   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 202   rprintf(F,"     --port=PORT             specify alternate rsyncd port number\n");
 203   rprintf(F,"     --blocking-io           use blocking IO for the remote shell\n");
 204   rprintf(F,"     --stats                 give some file transfer stats\n");
 205   rprintf(F,"     --progress              show progress during transfer\n");
 206   rprintf(F,"     --log-format=FORMAT     log file transfers using specified format\n");
 207   rprintf(F,"     --password-file=FILE    get password from FILE\n");
 208   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth, KBytes per second\n");
 209   rprintf(F," -h, --help                  show this help screen\n");
 210
 211   rprintf(F,"\n");
 212
 213   rprintf(F,"\nPlease see the rsync(1) and rsyncd.conf(5) man pages for full documentation\n");
 214   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 215 }
 216
 217 enum {OPT_VERSION = 1000, OPT_SUFFIX, OPT_SENDER, OPT_SERVER, OPT_EXCLUDE,
 218       OPT_EXCLUDE_FROM, OPT_DELETE, OPT_DELETE_EXCLUDED, OPT_NUMERIC_IDS,
 219       OPT_RSYNC_PATH, OPT_FORCE, OPT_TIMEOUT, OPT_DAEMON, OPT_CONFIG, OPT_PORT,
 220       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_STATS, OPT_PARTIAL, OPT_PROGRESS,
 221       OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST,
 222       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
 223       OPT_DELETE_AFTER, OPT_EXISTING, OPT_MAX_DELETE, OPT_BACKUP_DIR,
 224       OPT_IGNORE_ERRORS, OPT_BWLIMIT, OPT_BLOCKING_IO,
 225       OPT_MODIFY_WINDOW};
 226
 227 static struct poptOption long_options[] = {
 228   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 229   {"version",          0,  POPT_ARG_NONE,   0,             OPT_VERSION},
 230   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix},
 231   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path},
 232   {"password-file",    0,  POPT_ARG_STRING, &password_file},
 233   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times},
 234   {"size-only",        0,  POPT_ARG_NONE,   &size_only},
 235   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW},
 236   {"one-file-system", 'x', POPT_ARG_NONE,   &one_file_system},
 237   {"delete",           0,  POPT_ARG_NONE,   &delete_mode},
 238   {"existing",         0,  POPT_ARG_NONE,   &only_existing},
 239   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after},
 240   {"delete-excluded",  0,  POPT_ARG_NONE,   0,              OPT_DELETE_EXCLUDED},
 241   {"force",            0,  POPT_ARG_NONE,   &force_delete},
 242   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids},
 243   {"exclude",          0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE},
 244   {"include",          0,  POPT_ARG_STRING, 0,              OPT_INCLUDE},
 245   {"exclude-from",     0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE_FROM},
 246   {"include-from",     0,  POPT_ARG_STRING, 0,              OPT_INCLUDE_FROM},
 247   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks},
 248   {"help",            'h', POPT_ARG_NONE,   0,              'h'},
 249   {"backup",          'b', POPT_ARG_NONE,   &make_backups},
 250   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run},
 251   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files},
 252   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude},
 253   {"update",          'u', POPT_ARG_NONE,   &update_only},
 254   {"links",           'l', POPT_ARG_NONE,   &preserve_links},
 255   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links},
 256   {"whole",           'W', POPT_ARG_NONE,   &whole_file},
 257   {"copy-unsafe-links", 0, POPT_ARG_NONE,   &copy_unsafe_links},
 258   {"perms",           'p', POPT_ARG_NONE,   &preserve_perms},
 259   {"owner",           'o', POPT_ARG_NONE,   &preserve_uid},
 260   {"group",           'g', POPT_ARG_NONE,   &preserve_gid},
 261   {"devices",         'D', POPT_ARG_NONE,   &preserve_devices},
 262   {"times",           't', POPT_ARG_NONE,   &preserve_times},
 263   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum},
 264   {"verbose",         'v', POPT_ARG_NONE,   0,               'v'},
 265   {"quiet",           'q', POPT_ARG_NONE,   0,               'q'},
 266   {"archive",         'a', POPT_ARG_NONE,   0,               'a'},
 267   {"server",           0,  POPT_ARG_NONE,   &am_server},
 268   {"sender",           0,  POPT_ARG_NONE,   0,               OPT_SENDER},
 269   {"recurse",         'r', POPT_ARG_NONE,   &recurse},
 270   {"relative",        'R', POPT_ARG_NONE,   &relative_paths},
 271   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd},
 272   {"block-size",      'B', POPT_ARG_INT,    &block_size},
 273   {"max-delete",       0,  POPT_ARG_INT,    &max_delete},
 274   {"timeout",          0,  POPT_ARG_INT,    &io_timeout},
 275   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir},
 276   {"compare-dest",     0,  POPT_ARG_NONE,   &compare_dest},
 277   /* TODO: Should this take an optional int giving the compression level? */
 278   {"compress",        'z', POPT_ARG_NONE,   &do_compression},
 279   {"daemon",           0,  POPT_ARG_NONE,   &am_daemon},
 280   {"stats",            0,  POPT_ARG_NONE,   &do_stats},
 281   {"progress",         0,  POPT_ARG_NONE,   &do_progress},
 282   {"partial",          0,  POPT_ARG_NONE,   &keep_partial},
 283   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors},
 284   {"blocking-io",      0,  POPT_ARG_NONE,   &blocking_io},
 285   {0,                 'P', POPT_ARG_NONE,   0,               'P'},
 286   {"config",           0,  POPT_ARG_STRING, &config_file},
 287   {"port",             0,  POPT_ARG_INT,    &rsync_port},
 288   {"log-format",       0,  POPT_ARG_STRING, &log_format},
 289   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit},
 290   {"address",          0,  POPT_ARG_STRING, 0,               OPT_ADDRESS},
 291   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir},
 292   {"hard-links",      'H', POPT_ARG_NONE,   &preserve_hard_links},
 293   {0,0,0,0}
 294 };
 295
 296
 297 static char err_buf[100];
 298
 299
 300 void option_error(void)
 301 {
 302         if (err_buf[0]) {
 303                 rprintf(FLOG, "%s", err_buf);
 304                 rprintf(FERROR, "%s: %s", RSYNC_NAME, err_buf);
 305         } else {
 306                 rprintf(FLOG,"Error parsing options - unsupported option?\n");
 307                 rprintf(FERROR,"Error parsing options - unsupported option?\n");
 308         }
 309 }
 310
 311 /* check to see if we should refuse this option */
 312 static int check_refuse_options(char *ref, int opt)
 313 {
 314         int i, len;
 315         char *p;
 316         const char *name;
 317
 318         for (i=0; long_options[i].longName; i++) {
 319                 if (long_options[i].val == opt) break;
 320         }
 321
 322         if (!long_options[i].longName) return 0;
 323
 324         name = long_options[i].longName;
 325         len = strlen(name);
 326
 327         while ((p = strstr(ref,name))) {
 328                 if ((p==ref || p[-1]==' ') &&
 329                     (p[len] == ' ' || p[len] == 0)) {
 330                         snprintf(err_buf,sizeof(err_buf),
 331                                  "The '%s' option is not supported by this server\n", name);
 332                         return 1;
 333                 }
 334                 ref += len;
 335         }
 336         return 0;
 337 }
 338
 339
 340 static int count_args(char const **argv)
 341 {
 342         int i = 0;
 343
 344         while (argv[i] != NULL)
 345                 i++;
 346
 347         return i;
 348 }
 349
 350
 351 /* Process command line arguments.  Called on both local and remote.
 352  * Returns if all options are OK, otherwise fills in err_buf and
 353  * returns 0. */
 354 int parse_arguments(int *argc, const char ***argv, int frommain)
 355 {
 356         int opt;
 357         char *ref = lp_refuse_options(module_id);
 358         poptContext pc;
 359
 360         /* TODO: Call poptReadDefaultConfig; handle errors. */
 361
 362         /* The context leaks in case of an error, but if there's a
 363          * problem we always exit anyhow. */
 364         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
 365
 366         while ((opt = poptGetNextOpt(pc)) != -1) {
 367                 if (ref) {
 368                         if (check_refuse_options(ref, opt)) return 0;
 369                 }
 370
 371                 /* most options are handled automatically by popt;
 372                  * only special cases are returned and listed here. */
 373
 374                 switch (opt) {
 375                 case OPT_VERSION:
 376                         print_rsync_version(FINFO);
 377                         exit_cleanup(0);
 378
 379                 case OPT_MODIFY_WINDOW:
 380                         /* The value has already been set by popt, but
 381                          * we need to remember that we're using a
 382                          * non-default setting. */
 383                         modify_window_set = 1;
 384                         break;
 385
 386                 case OPT_DELETE_EXCLUDED:
 387                         delete_excluded = 1;
 388                         delete_mode = 1;
 389                         break;
 390
 391                 case OPT_EXCLUDE:
 392                         add_exclude(poptGetOptArg(pc), 0);
 393                         break;
 394
 395                 case OPT_INCLUDE:
 396                         add_exclude(poptGetOptArg(pc), 1);
 397                         break;
 398
 399                 case OPT_EXCLUDE_FROM:
 400                         add_exclude_file(poptGetOptArg(pc), 1, 0);
 401                         break;
 402
 403                 case OPT_INCLUDE_FROM:
 404                         add_exclude_file(poptGetOptArg(pc), 1, 1);
 405                         break;
 406
 407                 case 'h':
 408                         usage(FINFO);
 409                         exit_cleanup(0);
 410
 411                 case 'H':
 412 #if SUPPORT_HARD_LINKS
 413                         preserve_hard_links=1;
 414 #else
 415                         /* FIXME: Don't say "server" if this is
 416                          * happening on the client. */
 417                         /* FIXME: Why do we have the duplicated
 418                          * rprintf?  Everybody who gets this message
 419                          * ought to send it to the client and also to
 420                          * the logs. */
 421                         snprintf(err_buf,sizeof(err_buf),
 422                                  "hard links are not supported on this %s\n",
 423                                  am_server ? "server" : "client");
 424                         rprintf(FERROR,"ERROR: hard links not supported on this platform\n");
 425                         return 0;
 426 #endif /* SUPPORT_HARD_LINKS */
 427                         break;
 428
 429                 case 'v':
 430                         verbose++;
 431                         break;
 432
 433                 case 'q':
 434                         if (frommain) quiet++;
 435                         break;
 436
 437                 case 'a':
 438                         recurse=1;
 439 #if SUPPORT_LINKS
 440                         preserve_links=1;
 441 #endif
 442                         preserve_perms=1;
 443                         preserve_times=1;
 444                         preserve_gid=1;
 445                         preserve_uid=1;
 446                         preserve_devices=1;
 447                         break;
 448
 449                 case OPT_SENDER:
 450                         if (!am_server) {
 451                                 usage(FERROR);
 452                                 exit_cleanup(RERR_SYNTAX);
 453                         }
 454                         am_sender = 1;
 455                         break;
 456
 457                 case 'P':
 458                         do_progress = 1;
 459                         keep_partial = 1;
 460                         break;
 461
 462                 case OPT_ADDRESS:
 463                         {
 464                                 struct in_addr *ia;
 465                                 if ((ia = ip_address(optarg))) {
 466                                         socket_address = *ia;
 467                                 }
 468                         }
 469                         break;
 470
 471                 default:
 472                         /* FIXME: If --daemon is specified, then errors for later
 473                          * parameters seem to disappear. */
 474                         snprintf(err_buf, sizeof(err_buf),
 475                                  "%s%s: %s\n",
 476                                  am_server ? "on remote machine: " : "",
 477                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 478                                  poptStrerror(opt));
 479                         return 0;
 480                 }
 481         }
 482
 483         *argv = poptGetArgs(pc);
 484         if (*argv)
 485                 *argc = count_args(*argv);
 486         else
 487                 *argc = 0;
 488
 489         return 1;
 490 }
 491
 492
 493 /* Construct a filtered list of options to pass through from the
 494  * client to the server */
 495 void server_options(char **args,int *argc)
 496 {
 497         int ac = *argc;
 498         static char argstr[50];
 499         static char bsize[30];
 500         static char iotime[30];
 501         static char mdelete[30];
 502         static char mwindow[30];
 503         static char bw[50];
 504
 505         int i, x;
 506
 507         args[ac++] = "--server";
 508
 509         if (!am_sender)
 510                 args[ac++] = "--sender";
 511
 512         x = 1;
 513         argstr[0] = '-';
 514         for (i=0;i<verbose;i++)
 515                 argstr[x++] = 'v';
 516
 517         /* the -q option is intentionally left out */
 518         if (make_backups)
 519                 argstr[x++] = 'b';
 520         if (update_only)
 521                 argstr[x++] = 'u';
 522         if (dry_run)
 523                 argstr[x++] = 'n';
 524         if (preserve_links)
 525                 argstr[x++] = 'l';
 526         if (copy_links)
 527                 argstr[x++] = 'L';
 528         if (whole_file)
 529                 argstr[x++] = 'W';
 530         if (preserve_hard_links)
 531                 argstr[x++] = 'H';
 532         if (preserve_uid)
 533                 argstr[x++] = 'o';
 534         if (preserve_gid)
 535                 argstr[x++] = 'g';
 536         if (preserve_devices)
 537                 argstr[x++] = 'D';
 538         if (preserve_times)
 539                 argstr[x++] = 't';
 540         if (preserve_perms)
 541                 argstr[x++] = 'p';
 542         if (recurse)
 543                 argstr[x++] = 'r';
 544         if (always_checksum)
 545                 argstr[x++] = 'c';
 546         if (cvs_exclude)
 547                 argstr[x++] = 'C';
 548         if (ignore_times)
 549                 argstr[x++] = 'I';
 550         if (relative_paths)
 551                 argstr[x++] = 'R';
 552         if (one_file_system)
 553                 argstr[x++] = 'x';
 554         if (sparse_files)
 555                 argstr[x++] = 'S';
 556         if (do_compression)
 557                 argstr[x++] = 'z';
 558
 559         /* this is a complete hack - blame Rusty
 560
 561            this is a hack to make the list_only (remote file list)
 562            more useful */
 563         if (list_only && !recurse)
 564                 argstr[x++] = 'r';
 565
 566         argstr[x] = 0;
 567
 568         if (x != 1) args[ac++] = argstr;
 569
 570         if (block_size != BLOCK_SIZE) {
 571                 snprintf(bsize,sizeof(bsize),"-B%d",block_size);
 572                 args[ac++] = bsize;
 573         }
 574
 575         if (max_delete && am_sender) {
 576                 snprintf(mdelete,sizeof(mdelete),"--max-delete=%d",max_delete);
 577                 args[ac++] = mdelete;
 578         }
 579
 580         if (io_timeout) {
 581                 snprintf(iotime,sizeof(iotime),"--timeout=%d",io_timeout);
 582                 args[ac++] = iotime;
 583         }
 584
 585         if (bwlimit) {
 586                 snprintf(bw,sizeof(bw),"--bwlimit=%d",bwlimit);
 587                 args[ac++] = bw;
 588         }
 589
 590         if (strcmp(backup_suffix, BACKUP_SUFFIX)) {
 591                 args[ac++] = "--suffix";
 592                 args[ac++] = backup_suffix;
 593         }
 594
 595         if (delete_mode && !delete_excluded)
 596                 args[ac++] = "--delete";
 597
 598         if (delete_excluded)
 599                 args[ac++] = "--delete-excluded";
 600
 601         if (size_only)
 602                 args[ac++] = "--size-only";
 603
 604         if (modify_window_set) {
 605                 snprintf(mwindow,sizeof(mwindow),"--modify-window=%d",
 606                          modify_window);
 607                 args[ac++] = mwindow;
 608         }
 609
 610         if (keep_partial)
 611                 args[ac++] = "--partial";
 612
 613         if (force_delete)
 614                 args[ac++] = "--force";
 615
 616         if (delete_after)
 617                 args[ac++] = "--delete-after";
 618
 619         if (ignore_errors)
 620                 args[ac++] = "--ignore-errors";
 621
 622         if (copy_unsafe_links)
 623                 args[ac++] = "--copy-unsafe-links";
 624
 625         if (safe_symlinks)
 626                 args[ac++] = "--safe-links";
 627
 628         if (numeric_ids)
 629                 args[ac++] = "--numeric-ids";
 630
 631         if (only_existing && am_sender)
 632                 args[ac++] = "--existing";
 633
 634         if (tmpdir) {
 635                 args[ac++] = "--temp-dir";
 636                 args[ac++] = tmpdir;
 637         }
 638
 639         if (backup_dir && am_sender) {
 640                 /* only the receiver needs this option, if we are the sender
 641                  *   then we need to send it to the receiver.
 642                  */
 643                 args[ac++] = "--backup-dir";
 644                 args[ac++] = backup_dir;
 645         }
 646
 647         if (compare_dest && am_sender) {
 648                 /* the server only needs this option if it is not the sender,
 649                  *   and it may be an older version that doesn't know this
 650                  *   option, so don't send it if client is the sender.
 651                  */
 652                 args[ac++] = "--compare-dest";
 653                 args[ac++] = compare_dest;
 654         }
 655
 656
 657         *argc = ac;
 658 }
 659