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 delete_after=0;
  66 int only_existing=0;
  67
  68 char *backup_suffix = BACKUP_SUFFIX;
  69 char *tmpdir = NULL;
  70 char *compare_dest = NULL;
  71 char *config_file = RSYNCD_CONF;
  72 char *shell_cmd = NULL;
  73 char *log_format = NULL;
  74 char *password_file = NULL;
  75 char *rsync_path = RSYNC_NAME;
  76 int rsync_port = RSYNC_PORT;
  77
  78 int verbose = 0;
  79 int quiet = 0;
  80 int always_checksum = 0;
  81 int list_only = 0;
  82
  83 struct in_addr socket_address = {INADDR_ANY};
  84
  85 void usage(int F)
  86 {
  87   rprintf(F,"rsync version %s Copyright Andrew Tridgell and Paul Mackerras\n\n",
  88           VERSION);
  89
  90   rprintf(F,"rsync is a file transfer program capable of efficient remote update\nvia a fast differencing algorithm.\n\n");
  91
  92   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
  93   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC DEST\n");
  94   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... DEST\n");
  95   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
  96   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
  97   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
  98   rprintf(F,"SRC on single-colon remote HOST will be expanded by remote shell\n");
  99   rprintf(F,"SRC on server remote HOST may contain shell wildcards or multiple\n");
 100   rprintf(F,"  sources separated by space as long as they have same top-level\n");
 101   rprintf(F,"\nOptions\n");
 102   rprintf(F," -v, --verbose               increase verbosity\n");
 103   rprintf(F," -q, --quiet                 decrease verbosity\n");
 104   rprintf(F," -c, --checksum              always checksum\n");
 105   rprintf(F," -a, --archive               archive mode\n");
 106   rprintf(F," -r, --recursive             recurse into directories\n");
 107   rprintf(F," -R, --relative              use relative path names\n");
 108   rprintf(F," -b, --backup                make backups (default %s suffix)\n",BACKUP_SUFFIX);
 109   rprintf(F,"     --suffix=SUFFIX         override backup suffix\n");
 110   rprintf(F," -u, --update                update only (don't overwrite newer files)\n");
 111   rprintf(F," -l, --links                 preserve soft links\n");
 112   rprintf(F," -L, --copy-links            treat soft links like regular files\n");
 113   rprintf(F,"     --copy-unsafe-links     copy links outside the source tree\n");
 114   rprintf(F,"     --safe-links            ignore links outside the destination tree\n");
 115   rprintf(F," -H, --hard-links            preserve hard links\n");
 116   rprintf(F," -p, --perms                 preserve permissions\n");
 117   rprintf(F," -o, --owner                 preserve owner (root only)\n");
 118   rprintf(F," -g, --group                 preserve group\n");
 119   rprintf(F," -D, --devices               preserve devices (root only)\n");
 120   rprintf(F," -t, --times                 preserve times\n");
 121   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 122   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 123   rprintf(F," -W, --whole-file            copy whole files, no incremental checks\n");
 124   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 125   rprintf(F," -B, --block-size=SIZE       checksum blocking size (default %d)\n",BLOCK_SIZE);
 126   rprintf(F," -e, --rsh=COMMAND           specify rsh replacement\n");
 127   rprintf(F,"     --rsync-path=PATH       specify path to rsync on the remote machine\n");
 128   rprintf(F," -C, --cvs-exclude           auto ignore files in the same way CVS does\n");
 129   rprintf(F,"     --existing              only update files that already exist\n");
 130   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
 131   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
 132   rprintf(F,"     --delete-after          delete after transferring, not before\n");
 133   rprintf(F,"     --partial               keep partially transferred files\n");
 134   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 135   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 136   rprintf(F,"     --timeout=TIME          set IO timeout in seconds\n");
 137   rprintf(F," -I, --ignore-times          don't exclude files that match length and time\n");
 138   rprintf(F,"     --size-only             only use file size when determining if a file should be transferred\n");
 139   rprintf(F," -T  --temp-dir=DIR          create temporary files in directory DIR\n");
 140   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 141   rprintf(F," -P                          equivalent to --partial --progress\n");
 142   rprintf(F," -z, --compress              compress file data\n");
 143   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 144   rprintf(F,"     --exclude-from=FILE     exclude patterns listed in FILE\n");
 145   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 146   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
 147   rprintf(F,"     --version               print version number\n");
 148   rprintf(F,"     --daemon                run as a rsync daemon\n");
 149   rprintf(F,"     --address               bind to the specified address\n");
 150   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 151   rprintf(F,"     --port=PORT             specify alternate rsyncd port number\n");
 152   rprintf(F,"     --stats                 give some file transfer stats\n");
 153   rprintf(F,"     --progress              show progress during transfer\n");
 154   rprintf(F,"     --log-format=FORMAT     log file transfers using specified format\n");
 155   rprintf(F,"     --password-file=FILE    get password from FILE\n");
 156   rprintf(F," -h, --help                  show this help screen\n");
 157
 158   rprintf(F,"\n");
 159
 160   rprintf(F,"\nPlease see the rsync(1) and rsyncd.conf(5) man pages for full documentation\n");
 161   rprintf(F,"See http://rsync.samba.org/ for updates and bug reports\n");
 162 }
 163
 164 enum {OPT_VERSION, OPT_SUFFIX, OPT_SENDER, OPT_SERVER, OPT_EXCLUDE,
 165       OPT_EXCLUDE_FROM, OPT_DELETE, OPT_DELETE_EXCLUDED, OPT_NUMERIC_IDS,
 166       OPT_RSYNC_PATH, OPT_FORCE, OPT_TIMEOUT, OPT_DAEMON, OPT_CONFIG, OPT_PORT,
 167       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_STATS, OPT_PARTIAL, OPT_PROGRESS,
 168       OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST,
 169       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
 170       OPT_DELETE_AFTER, OPT_EXISTING};
 171
 172 static char *short_options = "oblLWHpguDCtcahvqrRIxnSe:B:T:zP";
 173
 174 static struct option long_options[] = {
 175   {"version",     0,     0,    OPT_VERSION},
 176   {"server",      0,     0,    OPT_SERVER},
 177   {"sender",      0,     0,    OPT_SENDER},
 178   {"existing",    0,     0,    OPT_EXISTING},
 179   {"delete",      0,     0,    OPT_DELETE},
 180   {"delete-excluded", 0, 0,    OPT_DELETE_EXCLUDED},
 181   {"force",       0,     0,    OPT_FORCE},
 182   {"numeric-ids", 0,     0,    OPT_NUMERIC_IDS},
 183   {"exclude",     1,     0,    OPT_EXCLUDE},
 184   {"exclude-from",1,     0,    OPT_EXCLUDE_FROM},
 185   {"include",     1,     0,    OPT_INCLUDE},
 186   {"include-from",1,     0,    OPT_INCLUDE_FROM},
 187   {"rsync-path",  1,     0,    OPT_RSYNC_PATH},
 188   {"password-file", 1,  0,     OPT_PASSWORD_FILE},
 189   {"one-file-system",0,  0,    'x'},
 190   {"ignore-times",0,     0,    'I'},
 191   {"size-only",   0,     0,    OPT_SIZE_ONLY},
 192   {"help",        0,     0,    'h'},
 193   {"dry-run",     0,     0,    'n'},
 194   {"sparse",      0,     0,    'S'},
 195   {"cvs-exclude", 0,     0,    'C'},
 196   {"archive",     0,     0,    'a'},
 197   {"checksum",    0,     0,    'c'},
 198   {"backup",      0,     0,    'b'},
 199   {"update",      0,     0,    'u'},
 200   {"verbose",     0,     0,    'v'},
 201   {"quiet",       0,     0,    'q'},
 202   {"recursive",   0,     0,    'r'},
 203   {"relative",    0,     0,    'R'},
 204   {"devices",     0,     0,    'D'},
 205   {"perms",       0,     0,    'p'},
 206   {"links",       0,     0,    'l'},
 207   {"copy-links",  0,     0,    'L'},
 208   {"copy-unsafe-links", 0, 0,  OPT_COPY_UNSAFE_LINKS},
 209   {"safe-links",  0,     0,    OPT_SAFE_LINKS},
 210   {"whole-file",  0,     0,    'W'},
 211   {"hard-links",  0,     0,    'H'},
 212   {"owner",       0,     0,    'o'},
 213   {"group",       0,     0,    'g'},
 214   {"times",       0,     0,    't'},
 215   {"rsh",         1,     0,    'e'},
 216   {"suffix",      1,     0,    OPT_SUFFIX},
 217   {"block-size",  1,     0,    'B'},
 218   {"timeout",     1,     0,    OPT_TIMEOUT},
 219   {"temp-dir",    1,     0,    'T'},
 220   {"compare-dest", 1,    0,    OPT_COMPARE_DEST},
 221   {"compress",    0,     0,    'z'},
 222   {"daemon",      0,     0,    OPT_DAEMON},
 223   {"stats",       0,     0,    OPT_STATS},
 224   {"progress",    0,     0,    OPT_PROGRESS},
 225   {"partial",     0,     0,    OPT_PARTIAL},
 226   {"delete-after",0,     0,    OPT_DELETE_AFTER},
 227   {"config",      1,     0,    OPT_CONFIG},
 228   {"port",        1,     0,    OPT_PORT},
 229   {"log-format",  1,     0,    OPT_LOG_FORMAT},
 230   {"address",     1,     0,    OPT_ADDRESS},
 231   {0,0,0,0}};
 232
 233
 234 static char err_buf[100];
 235
 236 void option_error(void)
 237 {
 238         if (err_buf[0]) {
 239                 rprintf(FLOG,"%s", err_buf);
 240                 rprintf(FERROR,"%s", err_buf);
 241         } else {
 242                 rprintf(FLOG,"Error parsing options - unsupported option?\n");
 243                 rprintf(FERROR,"Error parsing options - unsupported option?\n");
 244         }
 245         exit_cleanup(RERR_UNSUPPORTED);
 246 }
 247
 248 /* check to see if we should refuse this option */
 249 static int check_refuse_options(char *ref, int opt)
 250 {
 251         int i, len;
 252         char *p;
 253         const char *name;
 254
 255         for (i=0; long_options[i].name; i++) {
 256                 if (long_options[i].val == opt) break;
 257         }
 258
 259         if (!long_options[i].name) return 0;
 260
 261         name = long_options[i].name;
 262         len = strlen(name);
 263
 264         while ((p = strstr(ref,name))) {
 265                 if ((p==ref || p[-1]==' ') &&
 266                     (p[len] == ' ' || p[len] == 0)) {
 267                         slprintf(err_buf,sizeof(err_buf),
 268                                  "The '%s' option is not supported by this server\n", name);
 269                         return 1;
 270                 }
 271                 ref += len;
 272         }
 273         return 0;
 274 }
 275
 276
 277 int parse_arguments(int argc, char *argv[], int frommain)
 278 {
 279         int opt;
 280         int option_index;
 281         char *ref = lp_refuse_options(module_id);
 282
 283         while ((opt = getopt_long(argc, argv,
 284                                   short_options, long_options, &option_index))
 285                != -1) {
 286
 287                 if (ref) {
 288                         if (check_refuse_options(ref, opt)) return 0;
 289                 }
 290
 291                 switch (opt) {
 292                 case OPT_VERSION:
 293                         rprintf(FINFO,"rsync version %s  protocol version %d\n\n",
 294                                 VERSION,PROTOCOL_VERSION);
 295                         rprintf(FINFO,"Written by Andrew Tridgell and Paul Mackerras\n");
 296                         exit_cleanup(0);
 297
 298                 case OPT_SUFFIX:
 299                         backup_suffix = optarg;
 300                         break;
 301
 302                 case OPT_RSYNC_PATH:
 303                         rsync_path = optarg;
 304                         break;
 305
 306                 case OPT_PASSWORD_FILE:
 307                         password_file =optarg;
 308                         break;
 309
 310                 case 'I':
 311                         ignore_times = 1;
 312                         break;
 313
 314                 case OPT_SIZE_ONLY:
 315                         size_only = 1;
 316                         break;
 317
 318                 case 'x':
 319                         one_file_system=1;
 320                         break;
 321
 322                 case OPT_DELETE:
 323                         delete_mode = 1;
 324                         break;
 325
 326                 case OPT_EXISTING:
 327                         only_existing = 1;
 328                         break;
 329
 330                 case OPT_DELETE_AFTER:
 331                         delete_after = 1;
 332                         break;
 333
 334                 case OPT_DELETE_EXCLUDED:
 335                         delete_excluded = 1;
 336                         delete_mode = 1;
 337                         break;
 338
 339                 case OPT_FORCE:
 340                         force_delete = 1;
 341                         break;
 342
 343                 case OPT_NUMERIC_IDS:
 344                         numeric_ids = 1;
 345                         break;
 346
 347                 case OPT_EXCLUDE:
 348                         add_exclude(optarg, 0);
 349                         break;
 350
 351                 case OPT_INCLUDE:
 352                         add_exclude(optarg, 1);
 353                         break;
 354
 355                 case OPT_EXCLUDE_FROM:
 356                         add_exclude_file(optarg,1, 0);
 357                         break;
 358
 359                 case OPT_INCLUDE_FROM:
 360                         add_exclude_file(optarg,1, 1);
 361                         break;
 362
 363                 case OPT_COPY_UNSAFE_LINKS:
 364                         copy_unsafe_links=1;
 365                         break;
 366
 367                 case OPT_SAFE_LINKS:
 368                         safe_symlinks=1;
 369                         break;
 370
 371                 case 'h':
 372                         usage(FINFO);
 373                         exit_cleanup(0);
 374
 375                 case 'b':
 376                         make_backups=1;
 377                         break;
 378
 379                 case 'n':
 380                         dry_run=1;
 381                         break;
 382
 383                 case 'S':
 384                         sparse_files=1;
 385                         break;
 386
 387                 case 'C':
 388                         cvs_exclude=1;
 389                         break;
 390
 391                 case 'u':
 392                         update_only=1;
 393                         break;
 394
 395                 case 'l':
 396                         preserve_links=1;
 397                         break;
 398
 399                 case 'L':
 400                         copy_links=1;
 401                         break;
 402
 403                 case 'W':
 404                         whole_file=1;
 405                         break;
 406
 407                 case 'H':
 408 #if SUPPORT_HARD_LINKS
 409                         preserve_hard_links=1;
 410 #else
 411                         slprintf(err_buf,sizeof(err_buf),"hard links are not supported on this server\n");
 412                         rprintf(FERROR,"ERROR: hard links not supported on this platform\n");
 413                         return 0;
 414 #endif
 415                         break;
 416
 417                 case 'p':
 418                         preserve_perms=1;
 419                         break;
 420
 421                 case 'o':
 422                         preserve_uid=1;
 423                         break;
 424
 425                 case 'g':
 426                         preserve_gid=1;
 427                         break;
 428
 429                 case 'D':
 430                         preserve_devices=1;
 431                         break;
 432
 433                 case 't':
 434                         preserve_times=1;
 435                         break;
 436
 437                 case 'c':
 438                         always_checksum=1;
 439                         break;
 440
 441                 case 'v':
 442                         verbose++;
 443                         break;
 444
 445                 case 'q':
 446                         if (frommain) quiet++;
 447                         break;
 448
 449                 case 'a':
 450                         recurse=1;
 451 #if SUPPORT_LINKS
 452                         preserve_links=1;
 453 #endif
 454                         preserve_perms=1;
 455                         preserve_times=1;
 456                         preserve_gid=1;
 457                         if (am_root) {
 458                                 preserve_devices=1;
 459                                 preserve_uid=1;
 460                         }
 461                         break;
 462
 463                 case OPT_SERVER:
 464                         am_server = 1;
 465                         break;
 466
 467                 case OPT_SENDER:
 468                         if (!am_server) {
 469                                 usage(FERROR);
 470                                 exit_cleanup(RERR_SYNTAX);
 471                         }
 472                         am_sender = 1;
 473                         break;
 474
 475                 case 'r':
 476                         recurse = 1;
 477                         break;
 478
 479                 case 'R':
 480                         relative_paths = 1;
 481                         break;
 482
 483                 case 'e':
 484                         shell_cmd = optarg;
 485                         break;
 486
 487                 case 'B':
 488                         block_size = atoi(optarg);
 489                         break;
 490
 491                 case OPT_TIMEOUT:
 492                         io_timeout = atoi(optarg);
 493                         break;
 494
 495                 case 'T':
 496                         tmpdir = optarg;
 497                         break;
 498
 499                 case OPT_COMPARE_DEST:
 500                         compare_dest = optarg;
 501                         break;
 502
 503                 case 'z':
 504                         do_compression = 1;
 505                         break;
 506
 507                 case OPT_DAEMON:
 508                         am_daemon = 1;
 509                         break;
 510
 511                 case OPT_STATS:
 512                         do_stats = 1;
 513                         break;
 514
 515                 case OPT_PROGRESS:
 516                         do_progress = 1;
 517                         break;
 518
 519                 case OPT_PARTIAL:
 520                         keep_partial = 1;
 521                         break;
 522
 523                 case 'P':
 524                         do_progress = 1;
 525                         keep_partial = 1;
 526                         break;
 527
 528                 case OPT_CONFIG:
 529                         config_file = optarg;
 530                         break;
 531
 532                 case OPT_PORT:
 533                         rsync_port = atoi(optarg);
 534                         break;
 535
 536                 case OPT_LOG_FORMAT:
 537                         log_format = optarg;
 538                         break;
 539
 540                 case OPT_ADDRESS:
 541                         {
 542                                 struct in_addr *ia;
 543                                 if ((ia = ip_address(optarg))) {
 544                                         socket_address = *ia;
 545                                 }
 546                         }
 547                         break;
 548
 549                 default:
 550                         slprintf(err_buf,sizeof(err_buf),"unrecognised option\n");
 551                         return 0;
 552                 }
 553         }
 554         return 1;
 555 }
 556
 557
 558 void server_options(char **args,int *argc)
 559 {
 560         int ac = *argc;
 561         static char argstr[50];
 562         static char bsize[30];
 563         static char iotime[30];
 564         int i, x;
 565
 566         args[ac++] = "--server";
 567
 568         if (!am_sender)
 569                 args[ac++] = "--sender";
 570
 571         x = 1;
 572         argstr[0] = '-';
 573         for (i=0;i<verbose;i++)
 574                 argstr[x++] = 'v';
 575         /* the -q option is intentionally left out */
 576         if (make_backups)
 577                 argstr[x++] = 'b';
 578         if (update_only)
 579                 argstr[x++] = 'u';
 580         if (dry_run)
 581                 argstr[x++] = 'n';
 582         if (preserve_links)
 583                 argstr[x++] = 'l';
 584         if (copy_links)
 585                 argstr[x++] = 'L';
 586         if (whole_file)
 587                 argstr[x++] = 'W';
 588         if (preserve_hard_links)
 589                 argstr[x++] = 'H';
 590         if (preserve_uid)
 591                 argstr[x++] = 'o';
 592         if (preserve_gid)
 593                 argstr[x++] = 'g';
 594         if (preserve_devices)
 595                 argstr[x++] = 'D';
 596         if (preserve_times)
 597                 argstr[x++] = 't';
 598         if (preserve_perms)
 599                 argstr[x++] = 'p';
 600         if (recurse)
 601                 argstr[x++] = 'r';
 602         if (always_checksum)
 603                 argstr[x++] = 'c';
 604         if (cvs_exclude)
 605                 argstr[x++] = 'C';
 606         if (ignore_times)
 607                 argstr[x++] = 'I';
 608         if (relative_paths)
 609                 argstr[x++] = 'R';
 610         if (one_file_system)
 611                 argstr[x++] = 'x';
 612         if (sparse_files)
 613                 argstr[x++] = 'S';
 614         if (do_compression)
 615                 argstr[x++] = 'z';
 616         argstr[x] = 0;
 617
 618         if (x != 1) args[ac++] = argstr;
 619
 620         if (block_size != BLOCK_SIZE) {
 621                 sprintf(bsize,"-B%d",block_size);
 622                 args[ac++] = bsize;
 623         }
 624
 625         if (io_timeout) {
 626                 sprintf(iotime,"--timeout=%d",io_timeout);
 627                 args[ac++] = iotime;
 628         }
 629
 630         if (strcmp(backup_suffix, BACKUP_SUFFIX)) {
 631                 args[ac++] = "--suffix";
 632                 args[ac++] = backup_suffix;
 633         }
 634
 635         if (delete_mode && !delete_excluded)
 636                 args[ac++] = "--delete";
 637
 638         if (delete_excluded)
 639                 args[ac++] = "--delete-excluded";
 640
 641         if (size_only)
 642                 args[ac++] = "--size-only";
 643
 644         if (keep_partial)
 645                 args[ac++] = "--partial";
 646
 647         if (force_delete)
 648                 args[ac++] = "--force";
 649
 650         if (delete_after)
 651                 args[ac++] = "--delete-after";
 652
 653         if (copy_unsafe_links)
 654                 args[ac++] = "--copy-unsafe-links";
 655
 656         if (safe_symlinks)
 657                 args[ac++] = "--safe-links";
 658
 659         if (numeric_ids)
 660                 args[ac++] = "--numeric-ids";
 661
 662         if (only_existing)
 663                 args[ac++] = "--existing";
 664
 665         if (tmpdir) {
 666                 args[ac++] = "--temp-dir";
 667                 args[ac++] = tmpdir;
 668         }
 669
 670         if (compare_dest && am_sender) {
 671                 /* the server only needs this option if it is not the sender,
 672                  *   and it may be an older version that doesn't know this
 673                  *   option, so don't send it if client is the sender.
 674                  */
 675                 args[ac++] = "--compare-dest";
 676                 args[ac++] = compare_dest;
 677         }
 678
 679
 680         *argc = ac;
 681 }
 682