options.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1998
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 /* options parsing code */
  20
  21 #include "rsync.h"
  22
  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
  71 char *backup_suffix = BACKUP_SUFFIX;
  72 char *tmpdir = NULL;
  73 char *compare_dest = NULL;
  74 char *config_file = RSYNCD_CONF;
  75 char *shell_cmd = NULL;
  76 char *log_format = NULL;
  77 char *password_file = NULL;
  78 char *rsync_path = RSYNC_NAME;
  79 char *backup_dir = NULL;
  80 int rsync_port = RSYNC_PORT;
  81
  82 int verbose = 0;
  83 int quiet = 0;
  84 int always_checksum = 0;
  85 int list_only = 0;
  86
  87 struct in_addr socket_address = {INADDR_ANY};
  88
  89 void usage(enum logcode F)
  90 {
  91   rprintf(F,"rsync version %s Copyright Andrew Tridgell and Paul Mackerras\n\n",
  92           VERSION);
  93
  94   rprintf(F,"rsync is a file transfer program capable of efficient remote update\nvia a fast differencing algorithm.\n\n");
  95
  96   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
  97   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC DEST\n");
  98   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... DEST\n");
  99   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 100   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 101   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 102   rprintf(F,"SRC on single-colon remote HOST will be expanded by remote shell\n");
 103   rprintf(F,"SRC on server remote HOST may contain shell wildcards or multiple\n");
 104   rprintf(F,"  sources separated by space as long as they have same top-level\n");
 105   rprintf(F,"\nOptions\n");
 106   rprintf(F," -v, --verbose               increase verbosity\n");
 107   rprintf(F," -q, --quiet                 decrease verbosity\n");
 108   rprintf(F," -c, --checksum              always checksum\n");
 109   rprintf(F," -a, --archive               archive mode\n");
 110   rprintf(F," -r, --recursive             recurse into directories\n");
 111   rprintf(F," -R, --relative              use relative path names\n");
 112   rprintf(F," -b, --backup                make backups (default %s suffix)\n",BACKUP_SUFFIX);
 113   rprintf(F,"     --backup-dir            make backups into this directory\n");
 114   rprintf(F,"     --suffix=SUFFIX         override backup suffix\n");
 115   rprintf(F," -u, --update                update only (don't overwrite newer files)\n");
 116   rprintf(F," -l, --links                 preserve soft links\n");
 117   rprintf(F," -L, --copy-links            treat soft links like regular files\n");
 118   rprintf(F,"     --copy-unsafe-links     copy links outside the source tree\n");
 119   rprintf(F,"     --safe-links            ignore links outside the destination tree\n");
 120   rprintf(F," -H, --hard-links            preserve hard links\n");
 121   rprintf(F," -p, --perms                 preserve permissions\n");
 122   rprintf(F," -o, --owner                 preserve owner (root only)\n");
 123   rprintf(F," -g, --group                 preserve group\n");
 124   rprintf(F," -D, --devices               preserve devices (root only)\n");
 125   rprintf(F," -t, --times                 preserve times\n");
 126   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 127   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 128   rprintf(F," -W, --whole-file            copy whole files, no incremental checks\n");
 129   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 130   rprintf(F," -B, --block-size=SIZE       checksum blocking size (default %d)\n",BLOCK_SIZE);
 131   rprintf(F," -e, --rsh=COMMAND           specify rsh replacement\n");
 132   rprintf(F,"     --rsync-path=PATH       specify path to rsync on the remote machine\n");
 133   rprintf(F," -C, --cvs-exclude           auto ignore files in the same way CVS does\n");
 134   rprintf(F,"     --existing              only update files that already exist\n");
 135   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
 136   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
 137   rprintf(F,"     --delete-after          delete after transferring, not before\n");
 138   rprintf(F,"     --ignore-errors         delete even if there are IO errors\n");
 139   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 140   rprintf(F,"     --partial               keep partially transferred files\n");
 141   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 142   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 143   rprintf(F,"     --timeout=TIME          set IO timeout in seconds\n");
 144   rprintf(F," -I, --ignore-times          don't exclude files that match length and time\n");
 145   rprintf(F,"     --size-only             only use file size when determining if a file should be transferred\n");
 146   rprintf(F," -T  --temp-dir=DIR          create temporary files in directory DIR\n");
 147   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 148   rprintf(F," -P                          equivalent to --partial --progress\n");
 149   rprintf(F," -z, --compress              compress file data\n");
 150   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 151   rprintf(F,"     --exclude-from=FILE     exclude patterns listed in FILE\n");
 152   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 153   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
 154   rprintf(F,"     --version               print version number\n");
 155   rprintf(F,"     --daemon                run as a rsync daemon\n");
 156   rprintf(F,"     --address               bind to the specified address\n");
 157   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 158   rprintf(F,"     --port=PORT             specify alternate rsyncd port number\n");
 159   rprintf(F,"     --stats                 give some file transfer stats\n");
 160   rprintf(F,"     --progress              show progress during transfer\n");
 161   rprintf(F,"     --log-format=FORMAT     log file transfers using specified format\n");
 162   rprintf(F,"     --password-file=FILE    get password from FILE\n");
 163   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth, KBytes per second\n");
 164   rprintf(F," -h, --help                  show this help screen\n");
 165
 166   rprintf(F,"\n");
 167
 168   rprintf(F,"\nPlease see the rsync(1) and rsyncd.conf(5) man pages for full documentation\n");
 169   rprintf(F,"See http://rsync.samba.org/ for updates and bug reports\n");
 170 }
 171
 172 enum {OPT_VERSION, OPT_SUFFIX, OPT_SENDER, OPT_SERVER, OPT_EXCLUDE,
 173       OPT_EXCLUDE_FROM, OPT_DELETE, OPT_DELETE_EXCLUDED, OPT_NUMERIC_IDS,
 174       OPT_RSYNC_PATH, OPT_FORCE, OPT_TIMEOUT, OPT_DAEMON, OPT_CONFIG, OPT_PORT,
 175       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_STATS, OPT_PARTIAL, OPT_PROGRESS,
 176       OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST,
 177       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
 178       OPT_DELETE_AFTER, OPT_EXISTING, OPT_MAX_DELETE, OPT_BACKUP_DIR,
 179       OPT_IGNORE_ERRORS, OPT_BWLIMIT};
 180
 181 static char *short_options = "oblLWHpguDCtcahvqrRIxnSe:B:T:zP";
 182
 183 static struct option long_options[] = {
 184   {"version",     0,     0,    OPT_VERSION},
 185   {"server",      0,     0,    OPT_SERVER},
 186   {"sender",      0,     0,    OPT_SENDER},
 187   {"existing",    0,     0,    OPT_EXISTING},
 188   {"delete",      0,     0,    OPT_DELETE},
 189   {"delete-excluded", 0, 0,    OPT_DELETE_EXCLUDED},
 190   {"force",       0,     0,    OPT_FORCE},
 191   {"numeric-ids", 0,     0,    OPT_NUMERIC_IDS},
 192   {"exclude",     1,     0,    OPT_EXCLUDE},
 193   {"exclude-from",1,     0,    OPT_EXCLUDE_FROM},
 194   {"include",     1,     0,    OPT_INCLUDE},
 195   {"include-from",1,     0,    OPT_INCLUDE_FROM},
 196   {"rsync-path",  1,     0,    OPT_RSYNC_PATH},
 197   {"password-file", 1,  0,     OPT_PASSWORD_FILE},
 198   {"one-file-system",0,  0,    'x'},
 199   {"ignore-times",0,     0,    'I'},
 200   {"size-only",   0,     0,    OPT_SIZE_ONLY},
 201   {"help",        0,     0,    'h'},
 202   {"dry-run",     0,     0,    'n'},
 203   {"sparse",      0,     0,    'S'},
 204   {"cvs-exclude", 0,     0,    'C'},
 205   {"archive",     0,     0,    'a'},
 206   {"checksum",    0,     0,    'c'},
 207   {"backup",      0,     0,    'b'},
 208   {"update",      0,     0,    'u'},
 209   {"verbose",     0,     0,    'v'},
 210   {"quiet",       0,     0,    'q'},
 211   {"recursive",   0,     0,    'r'},
 212   {"relative",    0,     0,    'R'},
 213   {"devices",     0,     0,    'D'},
 214   {"perms",       0,     0,    'p'},
 215   {"links",       0,     0,    'l'},
 216   {"copy-links",  0,     0,    'L'},
 217   {"copy-unsafe-links", 0, 0,  OPT_COPY_UNSAFE_LINKS},
 218   {"safe-links",  0,     0,    OPT_SAFE_LINKS},
 219   {"whole-file",  0,     0,    'W'},
 220   {"hard-links",  0,     0,    'H'},
 221   {"owner",       0,     0,    'o'},
 222   {"group",       0,     0,    'g'},
 223   {"times",       0,     0,    't'},
 224   {"rsh",         1,     0,    'e'},
 225   {"suffix",      1,     0,    OPT_SUFFIX},
 226   {"block-size",  1,     0,    'B'},
 227   {"timeout",     1,     0,    OPT_TIMEOUT},
 228   {"temp-dir",    1,     0,    'T'},
 229   {"compare-dest", 1,    0,    OPT_COMPARE_DEST},
 230   {"compress",    0,     0,    'z'},
 231   {"daemon",      0,     0,    OPT_DAEMON},
 232   {"stats",       0,     0,    OPT_STATS},
 233   {"progress",    0,     0,    OPT_PROGRESS},
 234   {"partial",     0,     0,    OPT_PARTIAL},
 235   {"delete-after",0,     0,    OPT_DELETE_AFTER},
 236   {"ignore-errors",0,     0,   OPT_IGNORE_ERRORS},
 237   {"config",      1,     0,    OPT_CONFIG},
 238   {"port",        1,     0,    OPT_PORT},
 239   {"log-format",  1,     0,    OPT_LOG_FORMAT},
 240   {"bwlimit",     1,     0,    OPT_BWLIMIT},
 241   {"address",     1,     0,    OPT_ADDRESS},
 242   {"max-delete",  1,     0,    OPT_MAX_DELETE},
 243   {"backup-dir",  1,     0,    OPT_BACKUP_DIR},
 244   {0,0,0,0}};
 245
 246
 247 static char err_buf[100];
 248
 249 void option_error(void)
 250 {
 251         if (err_buf[0]) {
 252                 rprintf(FLOG,"%s", err_buf);
 253                 rprintf(FERROR,"%s", err_buf);
 254         } else {
 255                 rprintf(FLOG,"Error parsing options - unsupported option?\n");
 256                 rprintf(FERROR,"Error parsing options - unsupported option?\n");
 257         }
 258         exit_cleanup(RERR_UNSUPPORTED);
 259 }
 260
 261 /* check to see if we should refuse this option */
 262 static int check_refuse_options(char *ref, int opt)
 263 {
 264         int i, len;
 265         char *p;
 266         const char *name;
 267
 268         for (i=0; long_options[i].name; i++) {
 269                 if (long_options[i].val == opt) break;
 270         }
 271
 272         if (!long_options[i].name) return 0;
 273
 274         name = long_options[i].name;
 275         len = strlen(name);
 276
 277         while ((p = strstr(ref,name))) {
 278                 if ((p==ref || p[-1]==' ') &&
 279                     (p[len] == ' ' || p[len] == 0)) {
 280                         slprintf(err_buf,sizeof(err_buf),
 281                                  "The '%s' option is not supported by this server\n", name);
 282                         return 1;
 283                 }
 284                 ref += len;
 285         }
 286         return 0;
 287 }
 288
 289
 290 int parse_arguments(int argc, char *argv[], int frommain)
 291 {
 292         int opt;
 293         int option_index;
 294         char *ref = lp_refuse_options(module_id);
 295
 296         while ((opt = getopt_long(argc, argv,
 297                                   short_options, long_options, &option_index))
 298                != -1) {
 299
 300                 if (ref) {
 301                         if (check_refuse_options(ref, opt)) return 0;
 302                 }
 303
 304                 switch (opt) {
 305                 case OPT_VERSION:
 306                         rprintf(FINFO,"rsync version %s  protocol version %d\n\n",
 307                                 VERSION,PROTOCOL_VERSION);
 308                         rprintf(FINFO,"Written by Andrew Tridgell and Paul Mackerras\n");
 309                         exit_cleanup(0);
 310
 311                 case OPT_SUFFIX:
 312                         backup_suffix = optarg;
 313                         break;
 314
 315                 case OPT_RSYNC_PATH:
 316                         rsync_path = optarg;
 317                         break;
 318
 319                 case OPT_PASSWORD_FILE:
 320                         password_file =optarg;
 321                         break;
 322
 323                 case 'I':
 324                         ignore_times = 1;
 325                         break;
 326
 327                 case OPT_SIZE_ONLY:
 328                         size_only = 1;
 329                         break;
 330
 331                 case 'x':
 332                         one_file_system=1;
 333                         break;
 334
 335                 case OPT_DELETE:
 336                         delete_mode = 1;
 337                         break;
 338
 339                 case OPT_EXISTING:
 340                         only_existing = 1;
 341                         break;
 342
 343                 case OPT_DELETE_AFTER:
 344                         delete_after = 1;
 345                         break;
 346
 347                 case OPT_DELETE_EXCLUDED:
 348                         delete_excluded = 1;
 349                         delete_mode = 1;
 350                         break;
 351
 352                 case OPT_FORCE:
 353                         force_delete = 1;
 354                         break;
 355
 356                 case OPT_NUMERIC_IDS:
 357                         numeric_ids = 1;
 358                         break;
 359
 360                 case OPT_EXCLUDE:
 361                         add_exclude(optarg, 0);
 362                         break;
 363
 364                 case OPT_INCLUDE:
 365                         add_exclude(optarg, 1);
 366                         break;
 367
 368                 case OPT_EXCLUDE_FROM:
 369                         add_exclude_file(optarg,1, 0);
 370                         break;
 371
 372                 case OPT_INCLUDE_FROM:
 373                         add_exclude_file(optarg,1, 1);
 374                         break;
 375
 376                 case OPT_COPY_UNSAFE_LINKS:
 377                         copy_unsafe_links=1;
 378                         break;
 379
 380                 case OPT_SAFE_LINKS:
 381                         safe_symlinks=1;
 382                         break;
 383
 384                 case 'h':
 385                         usage(FINFO);
 386                         exit_cleanup(0);
 387
 388                 case 'b':
 389                         make_backups=1;
 390                         break;
 391
 392                 case 'n':
 393                         dry_run=1;
 394                         break;
 395
 396                 case 'S':
 397                         sparse_files=1;
 398                         break;
 399
 400                 case 'C':
 401                         cvs_exclude=1;
 402                         break;
 403
 404                 case 'u':
 405                         update_only=1;
 406                         break;
 407
 408                 case 'l':
 409                         preserve_links=1;
 410                         break;
 411
 412                 case 'L':
 413                         copy_links=1;
 414                         break;
 415
 416                 case 'W':
 417                         whole_file=1;
 418                         break;
 419
 420                 case 'H':
 421 #if SUPPORT_HARD_LINKS
 422                         preserve_hard_links=1;
 423 #else
 424                         slprintf(err_buf,sizeof(err_buf),"hard links are not supported on this server\n");
 425                         rprintf(FERROR,"ERROR: hard links not supported on this platform\n");
 426                         return 0;
 427 #endif
 428                         break;
 429
 430                 case 'p':
 431                         preserve_perms=1;
 432                         break;
 433
 434                 case 'o':
 435                         preserve_uid=1;
 436                         break;
 437
 438                 case 'g':
 439                         preserve_gid=1;
 440                         break;
 441
 442                 case 'D':
 443                         preserve_devices=1;
 444                         break;
 445
 446                 case 't':
 447                         preserve_times=1;
 448                         break;
 449
 450                 case 'c':
 451                         always_checksum=1;
 452                         break;
 453
 454                 case 'v':
 455                         verbose++;
 456                         break;
 457
 458                 case 'q':
 459                         if (frommain) quiet++;
 460                         break;
 461
 462                 case 'a':
 463                         recurse=1;
 464 #if SUPPORT_LINKS
 465                         preserve_links=1;
 466 #endif
 467                         preserve_perms=1;
 468                         preserve_times=1;
 469                         preserve_gid=1;
 470                         preserve_uid=1;
 471                         preserve_devices=1;
 472                         break;
 473
 474                 case OPT_SERVER:
 475                         am_server = 1;
 476                         break;
 477
 478                 case OPT_SENDER:
 479                         if (!am_server) {
 480                                 usage(FERROR);
 481                                 exit_cleanup(RERR_SYNTAX);
 482                         }
 483                         am_sender = 1;
 484                         break;
 485
 486                 case 'r':
 487                         recurse = 1;
 488                         break;
 489
 490                 case 'R':
 491                         relative_paths = 1;
 492                         break;
 493
 494                 case 'e':
 495                         shell_cmd = optarg;
 496                         break;
 497
 498                 case 'B':
 499                         block_size = atoi(optarg);
 500                         break;
 501
 502                 case OPT_MAX_DELETE:
 503                         max_delete = atoi(optarg);
 504                         break;
 505
 506                 case OPT_TIMEOUT:
 507                         io_timeout = atoi(optarg);
 508                         break;
 509
 510                 case 'T':
 511                         tmpdir = optarg;
 512                         break;
 513
 514                 case OPT_COMPARE_DEST:
 515                         compare_dest = optarg;
 516                         break;
 517
 518                 case 'z':
 519                         do_compression = 1;
 520                         break;
 521
 522                 case OPT_DAEMON:
 523                         am_daemon = 1;
 524                         break;
 525
 526                 case OPT_STATS:
 527                         do_stats = 1;
 528                         break;
 529
 530                 case OPT_PROGRESS:
 531                         do_progress = 1;
 532                         break;
 533
 534                 case OPT_PARTIAL:
 535                         keep_partial = 1;
 536                         break;
 537
 538                 case OPT_IGNORE_ERRORS:
 539                         ignore_errors = 1;
 540                         break;
 541
 542                 case 'P':
 543                         do_progress = 1;
 544                         keep_partial = 1;
 545                         break;
 546
 547                 case OPT_CONFIG:
 548                         config_file = optarg;
 549                         break;
 550
 551                 case OPT_PORT:
 552                         rsync_port = atoi(optarg);
 553                         break;
 554
 555                 case OPT_LOG_FORMAT:
 556                         log_format = optarg;
 557                         break;
 558
 559                 case OPT_BWLIMIT:
 560                         bwlimit = atoi(optarg);
 561                         break;
 562
 563                 case OPT_ADDRESS:
 564                         {
 565                                 struct in_addr *ia;
 566                                 if ((ia = ip_address(optarg))) {
 567                                         socket_address = *ia;
 568                                 }
 569                         }
 570                         break;
 571
 572                 case OPT_BACKUP_DIR:
 573                         backup_dir = optarg;
 574                         break;
 575
 576                 default:
 577                         slprintf(err_buf,sizeof(err_buf),"unrecognised option\n");
 578                         return 0;
 579                 }
 580         }
 581         return 1;
 582 }
 583
 584
 585 /* need to pass all the valid options from the client to the server */
 586
 587 void server_options(char **args,int *argc)
 588 {
 589         int ac = *argc;
 590         static char argstr[50];
 591         static char bsize[30];
 592         static char iotime[30];
 593         static char mdelete[30];
 594         static char bw[50];
 595
 596         int i, x;
 597
 598         args[ac++] = "--server";
 599
 600         if (!am_sender)
 601                 args[ac++] = "--sender";
 602
 603         x = 1;
 604         argstr[0] = '-';
 605         for (i=0;i<verbose;i++)
 606                 argstr[x++] = 'v';
 607         /* the -q option is intentionally left out */
 608         if (make_backups)
 609                 argstr[x++] = 'b';
 610         if (update_only)
 611                 argstr[x++] = 'u';
 612         if (dry_run)
 613                 argstr[x++] = 'n';
 614         if (preserve_links)
 615                 argstr[x++] = 'l';
 616         if (copy_links)
 617                 argstr[x++] = 'L';
 618         if (whole_file)
 619                 argstr[x++] = 'W';
 620         if (preserve_hard_links)
 621                 argstr[x++] = 'H';
 622         if (preserve_uid)
 623                 argstr[x++] = 'o';
 624         if (preserve_gid)
 625                 argstr[x++] = 'g';
 626         if (preserve_devices)
 627                 argstr[x++] = 'D';
 628         if (preserve_times)
 629                 argstr[x++] = 't';
 630         if (preserve_perms)
 631                 argstr[x++] = 'p';
 632         if (recurse)
 633                 argstr[x++] = 'r';
 634         if (always_checksum)
 635                 argstr[x++] = 'c';
 636         if (cvs_exclude)
 637                 argstr[x++] = 'C';
 638         if (ignore_times)
 639                 argstr[x++] = 'I';
 640         if (relative_paths)
 641                 argstr[x++] = 'R';
 642         if (one_file_system)
 643                 argstr[x++] = 'x';
 644         if (sparse_files)
 645                 argstr[x++] = 'S';
 646         if (do_compression)
 647                 argstr[x++] = 'z';
 648         argstr[x] = 0;
 649
 650         if (x != 1) args[ac++] = argstr;
 651
 652         if (block_size != BLOCK_SIZE) {
 653                 slprintf(bsize,sizeof(bsize),"-B%d",block_size);
 654                 args[ac++] = bsize;
 655         }
 656
 657         if (max_delete && am_sender) {
 658                 slprintf(mdelete,sizeof(mdelete),"--max-delete=%d",max_delete);
 659                 args[ac++] = mdelete;
 660         }
 661
 662         if (io_timeout) {
 663                 slprintf(iotime,sizeof(iotime),"--timeout=%d",io_timeout);
 664                 args[ac++] = iotime;
 665         }
 666
 667         if (bwlimit) {
 668                 slprintf(bw,sizeof(bw),"--bwlimit=%d",bwlimit);
 669                 args[ac++] = bw;
 670         }
 671
 672         if (strcmp(backup_suffix, BACKUP_SUFFIX)) {
 673                 args[ac++] = "--suffix";
 674                 args[ac++] = backup_suffix;
 675         }
 676
 677         if (delete_mode && !delete_excluded)
 678                 args[ac++] = "--delete";
 679
 680         if (delete_excluded)
 681                 args[ac++] = "--delete-excluded";
 682
 683         if (size_only)
 684                 args[ac++] = "--size-only";
 685
 686         if (keep_partial)
 687                 args[ac++] = "--partial";
 688
 689         if (force_delete)
 690                 args[ac++] = "--force";
 691
 692         if (delete_after)
 693                 args[ac++] = "--delete-after";
 694
 695         if (ignore_errors)
 696                 args[ac++] = "--ignore-errors";
 697
 698         if (copy_unsafe_links)
 699                 args[ac++] = "--copy-unsafe-links";
 700
 701         if (safe_symlinks)
 702                 args[ac++] = "--safe-links";
 703
 704         if (numeric_ids)
 705                 args[ac++] = "--numeric-ids";
 706
 707         if (only_existing && am_sender)
 708                 args[ac++] = "--existing";
 709
 710         if (tmpdir) {
 711                 args[ac++] = "--temp-dir";
 712                 args[ac++] = tmpdir;
 713         }
 714
 715         if (backup_dir && am_sender) {
 716                 /* only the receiver needs this option, if we are the sender
 717                  *   then we need to send it to the receiver.
 718                  */
 719                 args[ac++] = "--backup-dir";
 720                 args[ac++] = backup_dir;
 721         }
 722
 723         if (compare_dest && am_sender) {
 724                 /* the server only needs this option if it is not the sender,
 725                  *   and it may be an older version that doesn't know this
 726                  *   option, so don't send it if client is the sender.
 727                  */
 728                 args[ac++] = "--compare-dest";
 729                 args[ac++] = compare_dest;
 730         }
 731
 732
 733         *argc = ac;
 734 }
 735