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 int blocking_io=0;
  71
  72 char *backup_suffix = BACKUP_SUFFIX;
  73 char *tmpdir = NULL;
  74 char *compare_dest = NULL;
  75 char *config_file = RSYNCD_CONF;
  76 char *shell_cmd = NULL;
  77 char *log_format = NULL;
  78 char *password_file = NULL;
  79 char *rsync_path = RSYNC_NAME;
  80 char *backup_dir = NULL;
  81 int rsync_port = RSYNC_PORT;
  82
  83 int verbose = 0;
  84 int quiet = 0;
  85 int always_checksum = 0;
  86 int list_only = 0;
  87
  88 struct in_addr socket_address = {INADDR_ANY};
  89
  90 void usage(enum logcode F)
  91 {
  92   rprintf(F,"rsync version %s Copyright Andrew Tridgell and Paul Mackerras\n\n",
  93           VERSION);
  94
  95   rprintf(F,"rsync is a file transfer program capable of efficient remote update\nvia a fast differencing algorithm.\n\n");
  96
  97   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
  98   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC DEST\n");
  99   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... DEST\n");
 100   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 101   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 102   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 103   rprintf(F,"SRC on single-colon remote HOST will be expanded by remote shell\n");
 104   rprintf(F,"SRC on server remote HOST may contain shell wildcards or multiple\n");
 105   rprintf(F,"  sources separated by space as long as they have same top-level\n");
 106   rprintf(F,"\nOptions\n");
 107   rprintf(F," -v, --verbose               increase verbosity\n");
 108   rprintf(F," -q, --quiet                 decrease verbosity\n");
 109   rprintf(F," -c, --checksum              always checksum\n");
 110   rprintf(F," -a, --archive               archive mode\n");
 111   rprintf(F," -r, --recursive             recurse into directories\n");
 112   rprintf(F," -R, --relative              use relative path names\n");
 113   rprintf(F," -b, --backup                make backups (default %s suffix)\n",BACKUP_SUFFIX);
 114   rprintf(F,"     --backup-dir            make backups into this directory\n");
 115   rprintf(F,"     --suffix=SUFFIX         override backup suffix\n");
 116   rprintf(F," -u, --update                update only (don't overwrite newer files)\n");
 117   rprintf(F," -l, --links                 preserve soft links\n");
 118   rprintf(F," -L, --copy-links            treat soft links like regular files\n");
 119   rprintf(F,"     --copy-unsafe-links     copy links outside the source tree\n");
 120   rprintf(F,"     --safe-links            ignore links outside the destination tree\n");
 121   rprintf(F," -H, --hard-links            preserve hard links\n");
 122   rprintf(F," -p, --perms                 preserve permissions\n");
 123   rprintf(F," -o, --owner                 preserve owner (root only)\n");
 124   rprintf(F," -g, --group                 preserve group\n");
 125   rprintf(F," -D, --devices               preserve devices (root only)\n");
 126   rprintf(F," -t, --times                 preserve times\n");
 127   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 128   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 129   rprintf(F," -W, --whole-file            copy whole files, no incremental checks\n");
 130   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 131   rprintf(F," -B, --block-size=SIZE       checksum blocking size (default %d)\n",BLOCK_SIZE);
 132   rprintf(F," -e, --rsh=COMMAND           specify rsh replacement\n");
 133   rprintf(F,"     --rsync-path=PATH       specify path to rsync on the remote machine\n");
 134   rprintf(F," -C, --cvs-exclude           auto ignore files in the same way CVS does\n");
 135   rprintf(F,"     --existing              only update files that already exist\n");
 136   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
 137   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
 138   rprintf(F,"     --delete-after          delete after transferring, not before\n");
 139   rprintf(F,"     --ignore-errors         delete even if there are IO errors\n");
 140   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 141   rprintf(F,"     --partial               keep partially transferred files\n");
 142   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 143   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 144   rprintf(F,"     --timeout=TIME          set IO timeout in seconds\n");
 145   rprintf(F," -I, --ignore-times          don't exclude files that match length and time\n");
 146   rprintf(F,"     --size-only             only use file size when determining if a file should be transferred\n");
 147   rprintf(F," -T  --temp-dir=DIR          create temporary files in directory DIR\n");
 148   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 149   rprintf(F," -P                          equivalent to --partial --progress\n");
 150   rprintf(F," -z, --compress              compress file data\n");
 151   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 152   rprintf(F,"     --exclude-from=FILE     exclude patterns listed in FILE\n");
 153   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 154   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
 155   rprintf(F,"     --version               print version number\n");
 156   rprintf(F,"     --daemon                run as a rsync daemon\n");
 157   rprintf(F,"     --address               bind to the specified address\n");
 158   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 159   rprintf(F,"     --port=PORT             specify alternate rsyncd port number\n");
 160   rprintf(F,"     --blocking-io           use blocking IO for the remote shell\n");
 161   rprintf(F,"     --stats                 give some file transfer stats\n");
 162   rprintf(F,"     --progress              show progress during transfer\n");
 163   rprintf(F,"     --log-format=FORMAT     log file transfers using specified format\n");
 164   rprintf(F,"     --password-file=FILE    get password from FILE\n");
 165   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth, KBytes per second\n");
 166   rprintf(F," -h, --help                  show this help screen\n");
 167
 168   rprintf(F,"\n");
 169
 170   rprintf(F,"\nPlease see the rsync(1) and rsyncd.conf(5) man pages for full documentation\n");
 171   rprintf(F,"See http://rsync.samba.org/ for updates and bug reports\n");
 172 }
 173
 174 enum {OPT_VERSION, OPT_SUFFIX, OPT_SENDER, OPT_SERVER, OPT_EXCLUDE,
 175       OPT_EXCLUDE_FROM, OPT_DELETE, OPT_DELETE_EXCLUDED, OPT_NUMERIC_IDS,
 176       OPT_RSYNC_PATH, OPT_FORCE, OPT_TIMEOUT, OPT_DAEMON, OPT_CONFIG, OPT_PORT,
 177       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_STATS, OPT_PARTIAL, OPT_PROGRESS,
 178       OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST,
 179       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
 180       OPT_DELETE_AFTER, OPT_EXISTING, OPT_MAX_DELETE, OPT_BACKUP_DIR,
 181       OPT_IGNORE_ERRORS, OPT_BWLIMIT, OPT_BLOCKING_IO};
 182
 183 static char *short_options = "oblLWHpguDCtcahvqrRIxnSe:B:T:zP";
 184
 185 static struct option long_options[] = {
 186   {"version",     0,     0,    OPT_VERSION},
 187   {"server",      0,     0,    OPT_SERVER},
 188   {"sender",      0,     0,    OPT_SENDER},
 189   {"existing",    0,     0,    OPT_EXISTING},
 190   {"delete",      0,     0,    OPT_DELETE},
 191   {"delete-excluded", 0, 0,    OPT_DELETE_EXCLUDED},
 192   {"force",       0,     0,    OPT_FORCE},
 193   {"numeric-ids", 0,     0,    OPT_NUMERIC_IDS},
 194   {"exclude",     1,     0,    OPT_EXCLUDE},
 195   {"exclude-from",1,     0,    OPT_EXCLUDE_FROM},
 196   {"include",     1,     0,    OPT_INCLUDE},
 197   {"include-from",1,     0,    OPT_INCLUDE_FROM},
 198   {"rsync-path",  1,     0,    OPT_RSYNC_PATH},
 199   {"password-file", 1,  0,     OPT_PASSWORD_FILE},
 200   {"one-file-system",0,  0,    'x'},
 201   {"ignore-times",0,     0,    'I'},
 202   {"size-only",   0,     0,    OPT_SIZE_ONLY},
 203   {"help",        0,     0,    'h'},
 204   {"dry-run",     0,     0,    'n'},
 205   {"sparse",      0,     0,    'S'},
 206   {"cvs-exclude", 0,     0,    'C'},
 207   {"archive",     0,     0,    'a'},
 208   {"checksum",    0,     0,    'c'},
 209   {"backup",      0,     0,    'b'},
 210   {"update",      0,     0,    'u'},
 211   {"verbose",     0,     0,    'v'},
 212   {"quiet",       0,     0,    'q'},
 213   {"recursive",   0,     0,    'r'},
 214   {"relative",    0,     0,    'R'},
 215   {"devices",     0,     0,    'D'},
 216   {"perms",       0,     0,    'p'},
 217   {"links",       0,     0,    'l'},
 218   {"copy-links",  0,     0,    'L'},
 219   {"copy-unsafe-links", 0, 0,  OPT_COPY_UNSAFE_LINKS},
 220   {"safe-links",  0,     0,    OPT_SAFE_LINKS},
 221   {"whole-file",  0,     0,    'W'},
 222   {"hard-links",  0,     0,    'H'},
 223   {"owner",       0,     0,    'o'},
 224   {"group",       0,     0,    'g'},
 225   {"times",       0,     0,    't'},
 226   {"rsh",         1,     0,    'e'},
 227   {"suffix",      1,     0,    OPT_SUFFIX},
 228   {"block-size",  1,     0,    'B'},
 229   {"timeout",     1,     0,    OPT_TIMEOUT},
 230   {"temp-dir",    1,     0,    'T'},
 231   {"compare-dest", 1,    0,    OPT_COMPARE_DEST},
 232   {"compress",    0,     0,    'z'},
 233   {"daemon",      0,     0,    OPT_DAEMON},
 234   {"stats",       0,     0,    OPT_STATS},
 235   {"progress",    0,     0,    OPT_PROGRESS},
 236   {"partial",     0,     0,    OPT_PARTIAL},
 237   {"delete-after",0,     0,    OPT_DELETE_AFTER},
 238   {"ignore-errors",0,     0,   OPT_IGNORE_ERRORS},
 239   {"blocking-io" ,0,     0,    OPT_BLOCKING_IO},
 240   {"config",      1,     0,    OPT_CONFIG},
 241   {"port",        1,     0,    OPT_PORT},
 242   {"log-format",  1,     0,    OPT_LOG_FORMAT},
 243   {"bwlimit",     1,     0,    OPT_BWLIMIT},
 244   {"address",     1,     0,    OPT_ADDRESS},
 245   {"max-delete",  1,     0,    OPT_MAX_DELETE},
 246   {"backup-dir",  1,     0,    OPT_BACKUP_DIR},
 247   {0,0,0,0}};
 248
 249
 250 static char err_buf[100];
 251
 252 void option_error(void)
 253 {
 254         if (err_buf[0]) {
 255                 rprintf(FLOG,"%s", err_buf);
 256                 rprintf(FERROR,"%s", err_buf);
 257         } else {
 258                 rprintf(FLOG,"Error parsing options - unsupported option?\n");
 259                 rprintf(FERROR,"Error parsing options - unsupported option?\n");
 260         }
 261         exit_cleanup(RERR_UNSUPPORTED);
 262 }
 263
 264 /* check to see if we should refuse this option */
 265 static int check_refuse_options(char *ref, int opt)
 266 {
 267         int i, len;
 268         char *p;
 269         const char *name;
 270
 271         for (i=0; long_options[i].name; i++) {
 272                 if (long_options[i].val == opt) break;
 273         }
 274
 275         if (!long_options[i].name) return 0;
 276
 277         name = long_options[i].name;
 278         len = strlen(name);
 279
 280         while ((p = strstr(ref,name))) {
 281                 if ((p==ref || p[-1]==' ') &&
 282                     (p[len] == ' ' || p[len] == 0)) {
 283                         slprintf(err_buf,sizeof(err_buf),
 284                                  "The '%s' option is not supported by this server\n", name);
 285                         return 1;
 286                 }
 287                 ref += len;
 288         }
 289         return 0;
 290 }
 291
 292
 293 int parse_arguments(int argc, char *argv[], int frommain)
 294 {
 295         int opt;
 296         int option_index;
 297         char *ref = lp_refuse_options(module_id);
 298
 299         while ((opt = getopt_long(argc, argv,
 300                                   short_options, long_options, &option_index))
 301                != -1) {
 302
 303                 if (ref) {
 304                         if (check_refuse_options(ref, opt)) return 0;
 305                 }
 306
 307                 switch (opt) {
 308                 case OPT_VERSION:
 309                         rprintf(FINFO,"rsync version %s  protocol version %d\n\n",
 310                                 VERSION,PROTOCOL_VERSION);
 311                         rprintf(FINFO,"Written by Andrew Tridgell and Paul Mackerras\n");
 312                         exit_cleanup(0);
 313
 314                 case OPT_SUFFIX:
 315                         backup_suffix = optarg;
 316                         break;
 317
 318                 case OPT_RSYNC_PATH:
 319                         rsync_path = optarg;
 320                         break;
 321
 322                 case OPT_PASSWORD_FILE:
 323                         password_file =optarg;
 324                         break;
 325
 326                 case 'I':
 327                         ignore_times = 1;
 328                         break;
 329
 330                 case OPT_SIZE_ONLY:
 331                         size_only = 1;
 332                         break;
 333
 334                 case 'x':
 335                         one_file_system=1;
 336                         break;
 337
 338                 case OPT_DELETE:
 339                         delete_mode = 1;
 340                         break;
 341
 342                 case OPT_EXISTING:
 343                         only_existing = 1;
 344                         break;
 345
 346                 case OPT_DELETE_AFTER:
 347                         delete_after = 1;
 348                         break;
 349
 350                 case OPT_DELETE_EXCLUDED:
 351                         delete_excluded = 1;
 352                         delete_mode = 1;
 353                         break;
 354
 355                 case OPT_FORCE:
 356                         force_delete = 1;
 357                         break;
 358
 359                 case OPT_NUMERIC_IDS:
 360                         numeric_ids = 1;
 361                         break;
 362
 363                 case OPT_EXCLUDE:
 364                         add_exclude(optarg, 0);
 365                         break;
 366
 367                 case OPT_INCLUDE:
 368                         add_exclude(optarg, 1);
 369                         break;
 370
 371                 case OPT_EXCLUDE_FROM:
 372                         add_exclude_file(optarg,1, 0);
 373                         break;
 374
 375                 case OPT_INCLUDE_FROM:
 376                         add_exclude_file(optarg,1, 1);
 377                         break;
 378
 379                 case OPT_COPY_UNSAFE_LINKS:
 380                         copy_unsafe_links=1;
 381                         break;
 382
 383                 case OPT_SAFE_LINKS:
 384                         safe_symlinks=1;
 385                         break;
 386
 387                 case 'h':
 388                         usage(FINFO);
 389                         exit_cleanup(0);
 390
 391                 case 'b':
 392                         make_backups=1;
 393                         break;
 394
 395                 case 'n':
 396                         dry_run=1;
 397                         break;
 398
 399                 case 'S':
 400                         sparse_files=1;
 401                         break;
 402
 403                 case 'C':
 404                         cvs_exclude=1;
 405                         break;
 406
 407                 case 'u':
 408                         update_only=1;
 409                         break;
 410
 411                 case 'l':
 412                         preserve_links=1;
 413                         break;
 414
 415                 case 'L':
 416                         copy_links=1;
 417                         break;
 418
 419                 case 'W':
 420                         whole_file=1;
 421                         break;
 422
 423                 case 'H':
 424 #if SUPPORT_HARD_LINKS
 425                         preserve_hard_links=1;
 426 #else
 427                         slprintf(err_buf,sizeof(err_buf),"hard links are not supported on this server\n");
 428                         rprintf(FERROR,"ERROR: hard links not supported on this platform\n");
 429                         return 0;
 430 #endif
 431                         break;
 432
 433                 case 'p':
 434                         preserve_perms=1;
 435                         break;
 436
 437                 case 'o':
 438                         preserve_uid=1;
 439                         break;
 440
 441                 case 'g':
 442                         preserve_gid=1;
 443                         break;
 444
 445                 case 'D':
 446                         preserve_devices=1;
 447                         break;
 448
 449                 case 't':
 450                         preserve_times=1;
 451                         break;
 452
 453                 case 'c':
 454                         always_checksum=1;
 455                         break;
 456
 457                 case 'v':
 458                         verbose++;
 459                         break;
 460
 461                 case 'q':
 462                         if (frommain) quiet++;
 463                         break;
 464
 465                 case 'a':
 466                         recurse=1;
 467 #if SUPPORT_LINKS
 468                         preserve_links=1;
 469 #endif
 470                         preserve_perms=1;
 471                         preserve_times=1;
 472                         preserve_gid=1;
 473                         preserve_uid=1;
 474                         preserve_devices=1;
 475                         break;
 476
 477                 case OPT_SERVER:
 478                         am_server = 1;
 479                         break;
 480
 481                 case OPT_SENDER:
 482                         if (!am_server) {
 483                                 usage(FERROR);
 484                                 exit_cleanup(RERR_SYNTAX);
 485                         }
 486                         am_sender = 1;
 487                         break;
 488
 489                 case 'r':
 490                         recurse = 1;
 491                         break;
 492
 493                 case 'R':
 494                         relative_paths = 1;
 495                         break;
 496
 497                 case 'e':
 498                         shell_cmd = optarg;
 499                         break;
 500
 501                 case 'B':
 502                         block_size = atoi(optarg);
 503                         break;
 504
 505                 case OPT_MAX_DELETE:
 506                         max_delete = atoi(optarg);
 507                         break;
 508
 509                 case OPT_TIMEOUT:
 510                         io_timeout = atoi(optarg);
 511                         break;
 512
 513                 case 'T':
 514                         tmpdir = optarg;
 515                         break;
 516
 517                 case OPT_COMPARE_DEST:
 518                         compare_dest = optarg;
 519                         break;
 520
 521                 case 'z':
 522                         do_compression = 1;
 523                         break;
 524
 525                 case OPT_DAEMON:
 526                         am_daemon = 1;
 527                         break;
 528
 529                 case OPT_STATS:
 530                         do_stats = 1;
 531                         break;
 532
 533                 case OPT_PROGRESS:
 534                         do_progress = 1;
 535                         break;
 536
 537                 case OPT_PARTIAL:
 538                         keep_partial = 1;
 539                         break;
 540
 541                 case OPT_IGNORE_ERRORS:
 542                         ignore_errors = 1;
 543                         break;
 544
 545                 case OPT_BLOCKING_IO:
 546                         blocking_io = 1;
 547                         break;
 548
 549                 case 'P':
 550                         do_progress = 1;
 551                         keep_partial = 1;
 552                         break;
 553
 554                 case OPT_CONFIG:
 555                         config_file = optarg;
 556                         break;
 557
 558                 case OPT_PORT:
 559                         rsync_port = atoi(optarg);
 560                         break;
 561
 562                 case OPT_LOG_FORMAT:
 563                         log_format = optarg;
 564                         break;
 565
 566                 case OPT_BWLIMIT:
 567                         bwlimit = atoi(optarg);
 568                         break;
 569
 570                 case OPT_ADDRESS:
 571                         {
 572                                 struct in_addr *ia;
 573                                 if ((ia = ip_address(optarg))) {
 574                                         socket_address = *ia;
 575                                 }
 576                         }
 577                         break;
 578
 579                 case OPT_BACKUP_DIR:
 580                         backup_dir = optarg;
 581                         break;
 582
 583                 default:
 584                         slprintf(err_buf,sizeof(err_buf),"unrecognised option\n");
 585                         return 0;
 586                 }
 587         }
 588         return 1;
 589 }
 590
 591
 592 /* need to pass all the valid options from the client to the server */
 593
 594 void server_options(char **args,int *argc)
 595 {
 596         int ac = *argc;
 597         static char argstr[50];
 598         static char bsize[30];
 599         static char iotime[30];
 600         static char mdelete[30];
 601         static char bw[50];
 602
 603         int i, x;
 604
 605         args[ac++] = "--server";
 606
 607         if (!am_sender)
 608                 args[ac++] = "--sender";
 609
 610         x = 1;
 611         argstr[0] = '-';
 612         for (i=0;i<verbose;i++)
 613                 argstr[x++] = 'v';
 614
 615         /* the -q option is intentionally left out */
 616         if (make_backups)
 617                 argstr[x++] = 'b';
 618         if (update_only)
 619                 argstr[x++] = 'u';
 620         if (dry_run)
 621                 argstr[x++] = 'n';
 622         if (preserve_links)
 623                 argstr[x++] = 'l';
 624         if (copy_links)
 625                 argstr[x++] = 'L';
 626         if (whole_file)
 627                 argstr[x++] = 'W';
 628         if (preserve_hard_links)
 629                 argstr[x++] = 'H';
 630         if (preserve_uid)
 631                 argstr[x++] = 'o';
 632         if (preserve_gid)
 633                 argstr[x++] = 'g';
 634         if (preserve_devices)
 635                 argstr[x++] = 'D';
 636         if (preserve_times)
 637                 argstr[x++] = 't';
 638         if (preserve_perms)
 639                 argstr[x++] = 'p';
 640         if (recurse)
 641                 argstr[x++] = 'r';
 642         if (always_checksum)
 643                 argstr[x++] = 'c';
 644         if (cvs_exclude)
 645                 argstr[x++] = 'C';
 646         if (ignore_times)
 647                 argstr[x++] = 'I';
 648         if (relative_paths)
 649                 argstr[x++] = 'R';
 650         if (one_file_system)
 651                 argstr[x++] = 'x';
 652         if (sparse_files)
 653                 argstr[x++] = 'S';
 654         if (do_compression)
 655                 argstr[x++] = 'z';
 656
 657         /* this is a complete hack - blame Rusty
 658
 659            this is a hack to make the list_only (remote file list)
 660            more useful */
 661         if (list_only && !recurse)
 662                 argstr[x++] = 'r';
 663
 664         argstr[x] = 0;
 665
 666         if (x != 1) args[ac++] = argstr;
 667
 668         if (block_size != BLOCK_SIZE) {
 669                 slprintf(bsize,sizeof(bsize),"-B%d",block_size);
 670                 args[ac++] = bsize;
 671         }
 672
 673         if (max_delete && am_sender) {
 674                 slprintf(mdelete,sizeof(mdelete),"--max-delete=%d",max_delete);
 675                 args[ac++] = mdelete;
 676         }
 677
 678         if (io_timeout) {
 679                 slprintf(iotime,sizeof(iotime),"--timeout=%d",io_timeout);
 680                 args[ac++] = iotime;
 681         }
 682
 683         if (bwlimit) {
 684                 slprintf(bw,sizeof(bw),"--bwlimit=%d",bwlimit);
 685                 args[ac++] = bw;
 686         }
 687
 688         if (strcmp(backup_suffix, BACKUP_SUFFIX)) {
 689                 args[ac++] = "--suffix";
 690                 args[ac++] = backup_suffix;
 691         }
 692
 693         if (delete_mode && !delete_excluded)
 694                 args[ac++] = "--delete";
 695
 696         if (delete_excluded)
 697                 args[ac++] = "--delete-excluded";
 698
 699         if (size_only)
 700                 args[ac++] = "--size-only";
 701
 702         if (keep_partial)
 703                 args[ac++] = "--partial";
 704
 705         if (force_delete)
 706                 args[ac++] = "--force";
 707
 708         if (delete_after)
 709                 args[ac++] = "--delete-after";
 710
 711         if (ignore_errors)
 712                 args[ac++] = "--ignore-errors";
 713
 714         if (copy_unsafe_links)
 715                 args[ac++] = "--copy-unsafe-links";
 716
 717         if (safe_symlinks)
 718                 args[ac++] = "--safe-links";
 719
 720         if (numeric_ids)
 721                 args[ac++] = "--numeric-ids";
 722
 723         if (only_existing && am_sender)
 724                 args[ac++] = "--existing";
 725
 726         if (tmpdir) {
 727                 args[ac++] = "--temp-dir";
 728                 args[ac++] = tmpdir;
 729         }
 730
 731         if (backup_dir && am_sender) {
 732                 /* only the receiver needs this option, if we are the sender
 733                  *   then we need to send it to the receiver.
 734                  */
 735                 args[ac++] = "--backup-dir";
 736                 args[ac++] = backup_dir;
 737         }
 738
 739         if (compare_dest && am_sender) {
 740                 /* the server only needs this option if it is not the sender,
 741                  *   and it may be an older version that doesn't know this
 742                  *   option, so don't send it if client is the sender.
 743                  */
 744                 args[ac++] = "--compare-dest";
 745                 args[ac++] = compare_dest;
 746         }
 747
 748
 749         *argc = ac;
 750 }
 751