options.c

   1 /*  -*- c-file-style: "linux" -*-
   2  *
   3  * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
   4  * Copyright (C) 2000, 2001, 2002 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 extern int sanitize_paths;
  25 extern int select_timeout;
  26 extern struct exclude_list_struct exclude_list;
  27 extern struct exclude_list_struct server_exclude_list;
  28
  29 int make_backups = 0;
  30
  31 /**
  32  * If 1, send the whole file as literal data rather than trying to
  33  * create an incremental diff.
  34  *
  35  * If -1, then look at whether we're local or remote and go by that.
  36  *
  37  * @sa disable_deltas_p()
  38  **/
  39 int whole_file = -1;
  40
  41 int archive_mode = 0;
  42 int keep_dirlinks = 0;
  43 int copy_links = 0;
  44 int preserve_links = 0;
  45 int preserve_hard_links = 0;
  46 int preserve_perms = 0;
  47 int preserve_devices = 0;
  48 int preserve_uid = 0;
  49 int preserve_gid = 0;
  50 int preserve_times = 0;
  51 int update_only = 0;
  52 int cvs_exclude = 0;
  53 int dry_run = 0;
  54 int local_server = 0;
  55 int ignore_times = 0;
  56 int delete_mode = 0;
  57 int delete_excluded = 0;
  58 int one_file_system = 0;
  59 int protocol_version = PROTOCOL_VERSION;
  60 int sparse_files = 0;
  61 int do_compression = 0;
  62 int am_root = 0;
  63 int orig_umask = 0;
  64 int relative_paths = -1;
  65 int implied_dirs = 1;
  66 int numeric_ids = 0;
  67 int force_delete = 0;
  68 int io_timeout = 0;
  69 int read_only = 0;
  70 int module_id = -1;
  71 int am_server = 0;
  72 int am_sender = 0;
  73 int am_generator = 0;
  74 char *files_from = NULL;
  75 int filesfrom_fd = -1;
  76 char *remote_filesfrom_file = NULL;
  77 int eol_nulls = 0;
  78 int recurse = 0;
  79 int am_daemon = 0;
  80 int daemon_over_rsh = 0;
  81 int do_stats = 0;
  82 int do_progress = 0;
  83 int keep_partial = 0;
  84 int safe_symlinks = 0;
  85 int copy_unsafe_links = 0;
  86 int size_only = 0;
  87 int bwlimit = 0;
  88 size_t bwlimit_writemax = 0;
  89 int delete_after = 0;
  90 int only_existing = 0;
  91 int opt_ignore_existing = 0;
  92 int max_delete = 0;
  93 int ignore_errors = 0;
  94 int modify_window = 0;
  95 int blocking_io = -1;
  96 int checksum_seed = 0;
  97 int inplace = 0;
  98 unsigned int block_size = 0;
  99
 100
 101 /** Network address family. **/
 102 #ifdef INET6
 103 int default_af_hint = 0;        /* Any protocol */
 104 #else
 105 int default_af_hint = AF_INET;  /* Must use IPv4 */
 106 #endif
 107
 108 /** Do not go into the background when run as --daemon.  Good
 109  * for debugging and required for running as a service on W32,
 110  * or under Unix process-monitors. **/
 111 int no_detach = 0;
 112
 113 int write_batch = 0;
 114 int read_batch = 0;
 115 int backup_dir_len = 0;
 116 int backup_suffix_len;
 117 unsigned int backup_dir_remainder;
 118
 119 char *backup_suffix = NULL;
 120 char *tmpdir = NULL;
 121 char *partial_dir = NULL;
 122 char *compare_dest = NULL;
 123 char *config_file = NULL;
 124 char *shell_cmd = NULL;
 125 char *log_format = NULL;
 126 char *password_file = NULL;
 127 char *rsync_path = RSYNC_PATH;
 128 char *backup_dir = NULL;
 129 char backup_dir_buf[MAXPATHLEN];
 130 int rsync_port = RSYNC_PORT;
 131 int link_dest = 0;
 132
 133 int verbose = 0;
 134 int quiet = 0;
 135 int always_checksum = 0;
 136 int list_only = 0;
 137
 138 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 139 char *batch_name = NULL;
 140
 141 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 142 static int modify_window_set;
 143
 144 /** Local address to bind.  As a character string because it's
 145  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 146  * address, or a hostname. **/
 147 char *bind_address;
 148
 149
 150 static void print_rsync_version(enum logcode f)
 151 {
 152         char const *got_socketpair = "no ";
 153         char const *have_inplace = "no ";
 154         char const *hardlinks = "no ";
 155         char const *links = "no ";
 156         char const *ipv6 = "no ";
 157         STRUCT_STAT *dumstat;
 158
 159 #ifdef HAVE_SOCKETPAIR
 160         got_socketpair = "";
 161 #endif
 162
 163 #if HAVE_FTRUNCATE
 164         have_inplace = "";
 165 #endif
 166
 167 #if SUPPORT_HARD_LINKS
 168         hardlinks = "";
 169 #endif
 170
 171 #if SUPPORT_LINKS
 172         links = "";
 173 #endif
 174
 175 #if INET6
 176         ipv6 = "";
 177 #endif
 178
 179         rprintf(f, "%s  version %s  protocol version %d\n",
 180                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION);
 181         rprintf(f,
 182                 "Copyright (C) 1996-2004 by Andrew Tridgell and others\n");
 183         rprintf(f, "<http://rsync.samba.org/>\n");
 184         rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, "
 185                 "%shard links, %ssymlinks, batchfiles, \n",
 186                 (int) (sizeof (OFF_T) * 8),
 187                 got_socketpair, hardlinks, links);
 188
 189         /* Note that this field may not have type ino_t.  It depends
 190          * on the complicated interaction between largefile feature
 191          * macros. */
 192         rprintf(f, "              %sinplace, %sIPv6, %d-bit system inums, %d-bit internal inums\n",
 193                 have_inplace, ipv6,
 194                 (int) (sizeof dumstat->st_ino * 8),
 195                 (int) (sizeof (uint64) * 8));
 196 #ifdef MAINTAINER_MODE
 197         rprintf(f, "              panic action: \"%s\"\n",
 198                 get_panic_action());
 199 #endif
 200
 201 #ifdef INT64_IS_OFF_T
 202         if (sizeof (int64) < 8)
 203                 rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 204 #endif
 205
 206         rprintf(f,
 207 "\n"
 208 "rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n"
 209 "are welcome to redistribute it under certain conditions.  See the GNU\n"
 210 "General Public Licence for details.\n"
 211                 );
 212 }
 213
 214
 215 void usage(enum logcode F)
 216 {
 217   print_rsync_version(F);
 218
 219   rprintf(F,"\nrsync is a file transfer program capable of efficient remote update\nvia a fast differencing algorithm.\n\n");
 220
 221   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 222   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC DEST\n");
 223   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... DEST\n");
 224   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 225   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 226   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 227   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 228   rprintf(F,"SRC on single-colon remote HOST will be expanded by remote shell\n");
 229   rprintf(F,"SRC on server remote HOST may contain shell wildcards or multiple\n");
 230   rprintf(F,"  sources separated by space as long as they have same top-level\n");
 231   rprintf(F,"\nOptions\n");
 232   rprintf(F," -v, --verbose               increase verbosity\n");
 233   rprintf(F," -q, --quiet                 decrease verbosity\n");
 234   rprintf(F," -c, --checksum              always checksum\n");
 235   rprintf(F," -a, --archive               archive mode, equivalent to -rlptgoD\n");
 236   rprintf(F," -r, --recursive             recurse into directories\n");
 237   rprintf(F," -R, --relative              use relative path names\n");
 238   rprintf(F,"     --no-relative           turn off --relative\n");
 239   rprintf(F,"     --no-implied-dirs       don't send implied dirs with -R\n");
 240   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 241   rprintf(F,"     --backup-dir            make backups into this directory\n");
 242   rprintf(F,"     --suffix=SUFFIX         backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 243   rprintf(F," -u, --update                update only (don't overwrite newer files)\n");
 244   rprintf(F,"     --inplace               update destination files inplace (SEE MAN PAGE)\n");
 245   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 246   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 247   rprintf(F," -L, --copy-links            copy the referent of all symlinks\n");
 248   rprintf(F,"     --copy-unsafe-links     copy the referent of \"unsafe\" symlinks\n");
 249   rprintf(F,"     --safe-links            ignore \"unsafe\" symlinks\n");
 250   rprintf(F," -H, --hard-links            preserve hard links\n");
 251   rprintf(F," -p, --perms                 preserve permissions\n");
 252   rprintf(F," -o, --owner                 preserve owner (root only)\n");
 253   rprintf(F," -g, --group                 preserve group\n");
 254   rprintf(F," -D, --devices               preserve devices (root only)\n");
 255   rprintf(F," -t, --times                 preserve times\n");
 256   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 257   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 258   rprintf(F," -W, --whole-file            copy whole files, no incremental checks\n");
 259   rprintf(F,"     --no-whole-file         turn off --whole-file\n");
 260   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 261   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 262   rprintf(F," -e, --rsh=COMMAND           specify the remote shell\n");
 263   rprintf(F,"     --rsync-path=PATH       specify path to rsync on the remote machine\n");
 264   rprintf(F,"     --existing              only update files that already exist\n");
 265   rprintf(F,"     --ignore-existing       ignore files that already exist on receiving side\n");
 266   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
 267   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
 268   rprintf(F,"     --delete-after          receiver deletes after transferring, not before\n");
 269   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 270   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 271   rprintf(F,"     --partial               keep partially transferred files\n");
 272   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 273   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 274   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 275   rprintf(F,"     --timeout=TIME          set I/O timeout in seconds\n");
 276   rprintf(F," -I, --ignore-times          turn off mod time & file size quick check\n");
 277   rprintf(F,"     --size-only             ignore mod time for quick check (use size)\n");
 278   rprintf(F,"     --modify-window=NUM     compare mod times with reduced accuracy\n");
 279   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 280   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 281   rprintf(F,"     --link-dest=DIR         create hardlinks to DIR for unchanged files\n");
 282   rprintf(F," -P                          equivalent to --partial --progress\n");
 283   rprintf(F," -z, --compress              compress file data\n");
 284   rprintf(F," -C, --cvs-exclude           auto ignore files in the same way CVS does\n");
 285   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 286   rprintf(F,"     --exclude-from=FILE     exclude patterns listed in FILE\n");
 287   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 288   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
 289   rprintf(F,"     --files-from=FILE       read FILE for list of source-file names\n");
 290   rprintf(F," -0, --from0                 all *-from file lists are delimited by nulls\n");
 291   rprintf(F,"     --version               print version number\n");
 292   rprintf(F,"     --daemon                run as an rsync daemon\n");
 293   rprintf(F,"     --no-detach             do not detach from the parent\n");
 294   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
 295   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 296   rprintf(F,"     --port=PORT             specify alternate rsyncd port number\n");
 297   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 298   rprintf(F,"     --no-blocking-io        turn off --blocking-io\n");
 299   rprintf(F,"     --stats                 give some file transfer stats\n");
 300   rprintf(F,"     --progress              show progress during transfer\n");
 301   rprintf(F,"     --log-format=FORMAT     log file transfers using specified format\n");
 302   rprintf(F,"     --password-file=FILE    get password from FILE\n");
 303   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth, KBytes per second\n");
 304   rprintf(F,"     --write-batch=FILE      write a batch to FILE\n");
 305   rprintf(F,"     --read-batch=FILE       read a batch from FILE\n");
 306   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed\n");
 307 #ifdef INET6
 308   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 309   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 310 #endif
 311   rprintf(F," -h, --help                  show this help screen\n");
 312
 313   rprintf(F,"\n");
 314
 315   rprintf(F,"\nPlease see the rsync(1) and rsyncd.conf(5) man pages for full documentation\n");
 316   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 317 }
 318
 319 enum {OPT_VERSION = 1000, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 320       OPT_DELETE_AFTER, OPT_DELETE_EXCLUDED, OPT_LINK_DEST,
 321       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW,
 322       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_TIMEOUT,
 323       OPT_REFUSED_BASE = 9000};
 324
 325 static struct poptOption long_options[] = {
 326   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 327   {"version",          0,  POPT_ARG_NONE,   0,              OPT_VERSION, 0, 0},
 328   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 329   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 330   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
 331   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 332   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 333   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 334   {"one-file-system", 'x', POPT_ARG_NONE,   &one_file_system, 0, 0, 0 },
 335   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 336   {"existing",         0,  POPT_ARG_NONE,   &only_existing, 0, 0, 0 },
 337   {"ignore-existing",  0,  POPT_ARG_NONE,   &opt_ignore_existing, 0, 0, 0 },
 338   {"delete-after",     0,  POPT_ARG_NONE,   0,              OPT_DELETE_AFTER, 0, 0 },
 339   {"delete-excluded",  0,  POPT_ARG_NONE,   0,              OPT_DELETE_EXCLUDED, 0, 0 },
 340   {"force",            0,  POPT_ARG_NONE,   &force_delete, 0, 0, 0 },
 341   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids, 0, 0, 0 },
 342   {"exclude",          0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE, 0, 0 },
 343   {"include",          0,  POPT_ARG_STRING, 0,              OPT_INCLUDE, 0, 0 },
 344   {"exclude-from",     0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE_FROM, 0, 0 },
 345   {"include-from",     0,  POPT_ARG_STRING, 0,              OPT_INCLUDE_FROM, 0, 0 },
 346   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 347   {"help",            'h', POPT_ARG_NONE,   0,              'h', 0, 0 },
 348   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
 349   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 350   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files, 0, 0, 0 },
 351   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 352   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 353   {"inplace",          0,  POPT_ARG_NONE,   &inplace, 0, 0, 0 },
 354   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 355   {"links",           'l', POPT_ARG_NONE,   &preserve_links, 0, 0, 0 },
 356   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 357   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 358   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 359   {"copy-unsafe-links", 0, POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 360   {"perms",           'p', POPT_ARG_NONE,   &preserve_perms, 0, 0, 0 },
 361   {"owner",           'o', POPT_ARG_NONE,   &preserve_uid, 0, 0, 0 },
 362   {"group",           'g', POPT_ARG_NONE,   &preserve_gid, 0, 0, 0 },
 363   {"devices",         'D', POPT_ARG_NONE,   &preserve_devices, 0, 0, 0 },
 364   {"times",           't', POPT_ARG_NONE,   &preserve_times, 0, 0, 0 },
 365   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum, 0, 0, 0 },
 366   {"verbose",         'v', POPT_ARG_NONE,   0,               'v', 0, 0 },
 367   {"quiet",           'q', POPT_ARG_NONE,   0,               'q', 0, 0 },
 368   {"archive",         'a', POPT_ARG_NONE,   &archive_mode, 0, 0, 0 },
 369   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
 370   {"sender",           0,  POPT_ARG_NONE,   0,              OPT_SENDER, 0, 0 },
 371   {"recursive",       'r', POPT_ARG_NONE,   &recurse, 0, 0, 0 },
 372   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 373   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 374   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 375   {"block-size",      'B', POPT_ARG_INT,    &block_size, 0, 0, 0 },
 376   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 377   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, OPT_TIMEOUT, 0, 0 },
 378   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 379   {"compare-dest",     0,  POPT_ARG_STRING, &compare_dest, 0, 0, 0 },
 380   {"link-dest",        0,  POPT_ARG_STRING, &compare_dest,  OPT_LINK_DEST, 0, 0 },
 381   /* TODO: Should this take an optional int giving the compression level? */
 382   {"compress",        'z', POPT_ARG_NONE,   &do_compression, 0, 0, 0 },
 383   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
 384   {"no-detach",        0,  POPT_ARG_NONE,   &no_detach, 0, 0, 0 },
 385   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 386   {"progress",         0,  POPT_ARG_NONE,   &do_progress, 0, 0, 0 },
 387   {"partial",          0,  POPT_ARG_NONE,   &keep_partial, 0, 0, 0 },
 388   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 389   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors, 0, 0, 0 },
 390   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
 391   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
 392   {0,                 'P', POPT_ARG_NONE,   0,              'P', 0, 0 },
 393   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
 394   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 395   {"log-format",       0,  POPT_ARG_STRING, &log_format, 0, 0, 0 },
 396   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
 397   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 398   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 399   {"hard-links",      'H', POPT_ARG_NONE,   &preserve_hard_links, 0, 0, 0 },
 400   {"read-batch",       0,  POPT_ARG_STRING, &batch_name,  OPT_READ_BATCH, 0, 0 },
 401   {"write-batch",      0,  POPT_ARG_STRING, &batch_name,  OPT_WRITE_BATCH, 0, 0 },
 402   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 403   {"from0",           '0', POPT_ARG_NONE,   &eol_nulls, 0, 0, 0},
 404   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 405   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 406   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
 407 #ifdef INET6
 408   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 409   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 410 #endif
 411   {0,0,0,0, 0, 0, 0}
 412 };
 413
 414
 415 static char err_buf[200];
 416
 417
 418 /**
 419  * Store the option error message, if any, so that we can log the
 420  * connection attempt (which requires parsing the options), and then
 421  * show the error later on.
 422  **/
 423 void option_error(void)
 424 {
 425         if (!err_buf[0]) {
 426                 strcpy(err_buf, "Error parsing options: "
 427                     "option may be supported on client but not on server?\n");
 428         }
 429
 430         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
 431 }
 432
 433
 434 /**
 435  * Tweak the option table to disable all options that the rsyncd.conf
 436  * file has told us to refuse.
 437  **/
 438 static void set_refuse_options(char *bp)
 439 {
 440         struct poptOption *op;
 441         char *cp, shortname[2];
 442         int is_wild, found_match;
 443
 444         shortname[1] = '\0';
 445
 446         while (1) {
 447                 while (*bp == ' ') bp++;
 448                 if (!*bp)
 449                         break;
 450                 if ((cp = strchr(bp, ' ')) != NULL)
 451                         *cp= '\0';
 452                 /* If they specify "delete", reject all delete options. */
 453                 if (strcmp(bp, "delete") == 0)
 454                         bp = "delete*";
 455                 is_wild = strpbrk(bp, "*?[") != NULL;
 456                 found_match = 0;
 457                 for (op = long_options; ; op++) {
 458                         *shortname = op->shortName;
 459                         if (!op->longName && !*shortname)
 460                                 break;
 461                         if ((op->longName && wildmatch(bp, op->longName))
 462                             || (*shortname && wildmatch(bp, shortname))) {
 463                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
 464                                 found_match = 1;
 465                                 if (!is_wild)
 466                                         break;
 467                         }
 468                 }
 469                 if (!found_match) {
 470                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
 471                                 bp);
 472                 }
 473                 if (!cp)
 474                         break;
 475                 *cp = ' ';
 476                 bp = cp + 1;
 477         }
 478 }
 479
 480
 481 static int count_args(char const **argv)
 482 {
 483         int i = 0;
 484
 485         while (argv[i] != NULL)
 486                 i++;
 487
 488         return i;
 489 }
 490
 491
 492 /**
 493  * Process command line arguments.  Called on both local and remote.
 494  *
 495  * @retval 1 if all options are OK; with globals set to appropriate
 496  * values
 497  *
 498  * @retval 0 on error, with err_buf containing an explanation
 499  **/
 500 int parse_arguments(int *argc, const char ***argv, int frommain)
 501 {
 502         int opt;
 503         char *ref = lp_refuse_options(module_id);
 504         const char *arg;
 505         poptContext pc;
 506
 507         if (ref && *ref)
 508                 set_refuse_options(ref);
 509
 510         /* TODO: Call poptReadDefaultConfig; handle errors. */
 511
 512         /* The context leaks in case of an error, but if there's a
 513          * problem we always exit anyhow. */
 514         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
 515
 516         while ((opt = poptGetNextOpt(pc)) != -1) {
 517                 /* most options are handled automatically by popt;
 518                  * only special cases are returned and listed here. */
 519
 520                 switch (opt) {
 521                 case OPT_VERSION:
 522                         print_rsync_version(FINFO);
 523                         exit_cleanup(0);
 524
 525                 case OPT_MODIFY_WINDOW:
 526                         /* The value has already been set by popt, but
 527                          * we need to remember that we're using a
 528                          * non-default setting. */
 529                         modify_window_set = 1;
 530                         break;
 531
 532                 case OPT_DELETE_AFTER:
 533                         delete_after = 1;
 534                         delete_mode = 1;
 535                         break;
 536
 537                 case OPT_DELETE_EXCLUDED:
 538                         delete_excluded = 1;
 539                         delete_mode = 1;
 540                         break;
 541
 542                 case OPT_EXCLUDE:
 543                         add_exclude(&exclude_list, poptGetOptArg(pc), 0);
 544                         break;
 545
 546                 case OPT_INCLUDE:
 547                         add_exclude(&exclude_list, poptGetOptArg(pc),
 548                                     XFLG_DEF_INCLUDE);
 549                         break;
 550
 551                 case OPT_EXCLUDE_FROM:
 552                 case OPT_INCLUDE_FROM:
 553                         arg = poptGetOptArg(pc);
 554                         if (sanitize_paths)
 555                                 arg = sanitize_path(NULL, arg, NULL, 0);
 556                         if (server_exclude_list.head) {
 557                                 char *cp = (char *)arg;
 558                                 clean_fname(cp, 1);
 559                                 if (check_exclude(&server_exclude_list, cp, 0) < 0)
 560                                         goto options_rejected;
 561                         }
 562                         add_exclude_file(&exclude_list, arg, XFLG_FATAL_ERRORS
 563                                          | (opt == OPT_INCLUDE_FROM
 564                                           ? XFLG_DEF_INCLUDE : 0));
 565                         break;
 566
 567                 case 'h':
 568                         usage(FINFO);
 569                         exit_cleanup(0);
 570
 571                 case 'v':
 572                         verbose++;
 573                         break;
 574
 575                 case 'q':
 576                         if (frommain)
 577                                 quiet++;
 578                         break;
 579
 580                 case OPT_SENDER:
 581                         if (!am_server) {
 582                                 usage(FERROR);
 583                                 exit_cleanup(RERR_SYNTAX);
 584                         }
 585                         am_sender = 1;
 586                         break;
 587
 588                 case 'P':
 589                         do_progress = 1;
 590                         keep_partial = 1;
 591                         break;
 592
 593                 case OPT_WRITE_BATCH:
 594                         /* batch_name is already set */
 595                         write_batch = 1;
 596                         break;
 597
 598                 case OPT_READ_BATCH:
 599                         /* batch_name is already set */
 600                         read_batch = 1;
 601                         break;
 602
 603                 case OPT_TIMEOUT:
 604                         if (io_timeout && io_timeout < select_timeout)
 605                                 select_timeout = io_timeout;
 606                         break;
 607
 608                 case OPT_LINK_DEST:
 609 #if HAVE_LINK
 610                         link_dest = 1;
 611                         break;
 612 #else
 613                         snprintf(err_buf, sizeof err_buf,
 614                                  "hard links are not supported on this %s\n",
 615                                  am_server ? "server" : "client");
 616                         return 0;
 617 #endif
 618
 619                 default:
 620                         /* A large opt value means that set_refuse_options()
 621                          * turned this option off (opt-BASE is its index). */
 622                         if (opt >= OPT_REFUSED_BASE) {
 623                                 struct poptOption *op =
 624                                     &long_options[opt-OPT_REFUSED_BASE];
 625                                 int n = snprintf(err_buf, sizeof err_buf,
 626                                     "This server does not support --%s\n",
 627                                     op->longName) - 1;
 628                                 if (op->shortName) {
 629                                         snprintf(err_buf+n, sizeof err_buf-n,
 630                                             " (-%c)\n", op->shortName);
 631                                 }
 632                         } else {
 633                                 snprintf(err_buf, sizeof err_buf,
 634                                     "%s%s: %s\n",
 635                                     am_server ? "on remote machine: " : "",
 636                                     poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 637                                     poptStrerror(opt));
 638                         }
 639                         return 0;
 640                 }
 641         }
 642
 643 #if !SUPPORT_LINKS
 644         if (preserve_links && !am_sender) {
 645                 snprintf(err_buf, sizeof err_buf,
 646                          "symlinks are not supported on this %s\n",
 647                          am_server ? "server" : "client");
 648                 return 0;
 649         }
 650 #endif
 651
 652 #if !SUPPORT_HARD_LINKS
 653         if (preserve_hard_links) {
 654                 snprintf(err_buf, sizeof err_buf,
 655                          "hard links are not supported on this %s\n",
 656                          am_server ? "server" : "client");
 657                 return 0;
 658         }
 659 #endif
 660
 661         if (write_batch && read_batch) {
 662                 snprintf(err_buf, sizeof err_buf,
 663                         "--write-batch and --read-batch can not be used together\n");
 664                 return 0;
 665         }
 666         if (write_batch || read_batch) {
 667                 if (dry_run) {
 668                         snprintf(err_buf, sizeof err_buf,
 669                                 "--%s-batch cannot be used with --dry_run (-n)\n",
 670                                 write_batch ? "write" : "read");
 671                         return 0;
 672                 }
 673                 if (am_server) {
 674                         rprintf(FINFO,
 675                                 "ignoring --%s-batch option sent to server\n",
 676                                 write_batch ? "write" : "read");
 677                         /* We don't actually exit_cleanup(), so that we can
 678                          * still service older version clients that still send
 679                          * batch args to server. */
 680                         read_batch = write_batch = 0;
 681                         batch_name = NULL;
 682                 }
 683         }
 684         if (read_batch && files_from) {
 685                 snprintf(err_buf, sizeof err_buf,
 686                         "--read-batch cannot be used with --files-from\n");
 687                 return 0;
 688         }
 689         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
 690                 snprintf(err_buf, sizeof err_buf,
 691                         "the batch-file name must be %d characters or less.\n",
 692                         MAX_BATCH_NAME_LEN);
 693                 return 0;
 694         }
 695
 696         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
 697                 snprintf(err_buf, sizeof err_buf,
 698                          "the --temp-dir path is WAY too long.\n");
 699                 return 0;
 700         }
 701
 702         if (archive_mode) {
 703                 if (!files_from)
 704                         recurse = 1;
 705 #if SUPPORT_LINKS
 706                 preserve_links = 1;
 707 #endif
 708                 preserve_perms = 1;
 709                 preserve_times = 1;
 710                 preserve_gid = 1;
 711                 preserve_uid = 1;
 712                 preserve_devices = 1;
 713         }
 714
 715         if (relative_paths < 0)
 716                 relative_paths = files_from? 1 : 0;
 717
 718         *argv = poptGetArgs(pc);
 719         if (*argv)
 720                 *argc = count_args(*argv);
 721         else
 722                 *argc = 0;
 723
 724         if (sanitize_paths) {
 725                 int i;
 726                 for (i = *argc; i-- > 0; )
 727                         (*argv)[i] = sanitize_path(NULL, (*argv)[i], "", 0);
 728                 if (tmpdir)
 729                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0);
 730                 if (partial_dir)
 731                         partial_dir = sanitize_path(NULL, partial_dir, NULL, 0);
 732                 if (compare_dest)
 733                         compare_dest = sanitize_path(NULL, compare_dest, NULL, 0);
 734                 if (backup_dir)
 735                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0);
 736                 if (files_from)
 737                         files_from = sanitize_path(NULL, files_from, NULL, 0);
 738         }
 739         if (server_exclude_list.head && !am_sender) {
 740                 struct exclude_list_struct *elp = &server_exclude_list;
 741                 if (tmpdir) {
 742                         clean_fname(tmpdir, 1);
 743                         if (check_exclude(elp, tmpdir, 1) < 0)
 744                                 goto options_rejected;
 745                 }
 746                 if (partial_dir) {
 747                         clean_fname(partial_dir, 1);
 748                         if (check_exclude(elp, partial_dir, 1) < 0)
 749                                 goto options_rejected;
 750                 }
 751                 if (compare_dest) {
 752                         clean_fname(compare_dest, 1);
 753                         if (check_exclude(elp, compare_dest, 1) < 0)
 754                                 goto options_rejected;
 755                 }
 756                 if (backup_dir) {
 757                         clean_fname(backup_dir, 1);
 758                         if (check_exclude(elp, backup_dir, 1) < 0)
 759                                 goto options_rejected;
 760                 }
 761         }
 762         if (server_exclude_list.head && files_from) {
 763                 clean_fname(files_from, 1);
 764                 if (check_exclude(&server_exclude_list, files_from, 0) < 0) {
 765                     options_rejected:
 766                         snprintf(err_buf, sizeof err_buf,
 767                             "Your options have been rejected by the server.\n");
 768                         return 0;
 769                 }
 770         }
 771
 772         if (daemon_opt) {
 773                 daemon_opt = 0;
 774                 am_daemon = 1;
 775                 return 1;
 776         }
 777
 778         if (!backup_suffix)
 779                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
 780         backup_suffix_len = strlen(backup_suffix);
 781         if (strchr(backup_suffix, '/') != NULL) {
 782                 snprintf(err_buf, sizeof err_buf,
 783                         "--suffix cannot contain slashes: %s\n",
 784                         backup_suffix);
 785                 return 0;
 786         }
 787         if (backup_dir) {
 788                 backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
 789                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
 790                 if (backup_dir_remainder < 32) {
 791                         snprintf(err_buf, sizeof err_buf,
 792                                 "the --backup-dir path is WAY too long.\n");
 793                         return 0;
 794                 }
 795                 if (backup_dir_buf[backup_dir_len - 1] != '/') {
 796                         backup_dir_buf[backup_dir_len++] = '/';
 797                         backup_dir_buf[backup_dir_len] = '\0';
 798                 }
 799                 if (verbose > 1 && !am_sender)
 800                         rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
 801         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
 802                 snprintf(err_buf, sizeof err_buf,
 803                         "--suffix cannot be a null string without --backup-dir\n");
 804                 return 0;
 805         }
 806
 807         if (do_progress && !verbose)
 808                 verbose = 1;
 809
 810         if (bwlimit) {
 811                 bwlimit_writemax = (size_t)bwlimit * 128;
 812                 if (bwlimit_writemax < 512)
 813                         bwlimit_writemax = 512;
 814         }
 815
 816         if (inplace) {
 817 #if HAVE_FTRUNCATE
 818                 if (partial_dir) {
 819                         snprintf(err_buf, sizeof err_buf,
 820                                  "--inplace cannot be used with --partial-dir\n");
 821                         return 0;
 822                 }
 823                 keep_partial = 0;
 824 #else
 825                 snprintf(err_buf, sizeof err_buf,
 826                          "--inplace is not supported on this %s\n",
 827                          am_server ? "server" : "client");
 828                 return 0;
 829 #endif
 830                 if (compare_dest) {
 831                         snprintf(err_buf, sizeof err_buf,
 832                                  "--inplace does not yet work with %s\n",
 833                                  link_dest ? "--link-dest" : "--compare-dest");
 834                         return 0;
 835                 }
 836         } else {
 837                 if (keep_partial && !partial_dir)
 838                         partial_dir = getenv("RSYNC_PARTIAL_DIR");
 839                 if (partial_dir) {
 840                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
 841                                 partial_dir = NULL;
 842                         keep_partial = 1;
 843                 }
 844         }
 845
 846         if (files_from) {
 847                 char *colon;
 848                 if (*argc > 2 || (!am_daemon && *argc == 1)) {
 849                         usage(FERROR);
 850                         exit_cleanup(RERR_SYNTAX);
 851                 }
 852                 if (strcmp(files_from, "-") == 0) {
 853                         filesfrom_fd = 0;
 854                         if (am_server)
 855                                 remote_filesfrom_file = "-";
 856                 }
 857                 else if ((colon = find_colon(files_from)) != 0) {
 858                         if (am_server) {
 859                                 usage(FERROR);
 860                                 exit_cleanup(RERR_SYNTAX);
 861                         }
 862                         remote_filesfrom_file = colon+1 + (colon[1] == ':');
 863                         if (strcmp(remote_filesfrom_file, "-") == 0) {
 864                                 snprintf(err_buf, sizeof err_buf,
 865                                         "Invalid --files-from remote filename\n");
 866                                 return 0;
 867                         }
 868                 } else {
 869                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
 870                         if (filesfrom_fd < 0) {
 871                                 snprintf(err_buf, sizeof err_buf,
 872                                         "failed to open files-from file %s: %s\n",
 873                                         files_from, strerror(errno));
 874                                 return 0;
 875                         }
 876                 }
 877         }
 878
 879         return 1;
 880 }
 881
 882
 883 /**
 884  * Construct a filtered list of options to pass through from the
 885  * client to the server.
 886  *
 887  * This involves setting options that will tell the server how to
 888  * behave, and also filtering out options that are processed only
 889  * locally.
 890  **/
 891 void server_options(char **args,int *argc)
 892 {
 893         int ac = *argc;
 894         static char argstr[50];
 895         char *arg;
 896
 897         int i, x;
 898
 899         if (blocking_io == -1)
 900                 blocking_io = 0;
 901
 902         args[ac++] = "--server";
 903
 904         if (daemon_over_rsh) {
 905                 args[ac++] = "--daemon";
 906                 *argc = ac;
 907                 /* if we're passing --daemon, we're done */
 908                 return;
 909         }
 910
 911         if (!am_sender)
 912                 args[ac++] = "--sender";
 913
 914         x = 1;
 915         argstr[0] = '-';
 916         for (i = 0; i < verbose; i++)
 917                 argstr[x++] = 'v';
 918
 919         /* the -q option is intentionally left out */
 920         if (make_backups)
 921                 argstr[x++] = 'b';
 922         if (update_only)
 923                 argstr[x++] = 'u';
 924         if (dry_run)
 925                 argstr[x++] = 'n';
 926         if (preserve_links)
 927                 argstr[x++] = 'l';
 928         if (copy_links)
 929                 argstr[x++] = 'L';
 930         if (keep_dirlinks && am_sender)
 931                 argstr[x++] = 'K';
 932
 933         if (whole_file > 0)
 934                 argstr[x++] = 'W';
 935         /* We don't need to send --no-whole-file, because it's the
 936          * default for remote transfers, and in any case old versions
 937          * of rsync will not understand it. */
 938
 939         if (preserve_hard_links)
 940                 argstr[x++] = 'H';
 941         if (preserve_uid)
 942                 argstr[x++] = 'o';
 943         if (preserve_gid)
 944                 argstr[x++] = 'g';
 945         if (preserve_devices)
 946                 argstr[x++] = 'D';
 947         if (preserve_times)
 948                 argstr[x++] = 't';
 949         if (preserve_perms)
 950                 argstr[x++] = 'p';
 951         if (recurse)
 952                 argstr[x++] = 'r';
 953         if (always_checksum)
 954                 argstr[x++] = 'c';
 955         if (cvs_exclude)
 956                 argstr[x++] = 'C';
 957         if (ignore_times)
 958                 argstr[x++] = 'I';
 959         if (relative_paths)
 960                 argstr[x++] = 'R';
 961         if (one_file_system)
 962                 argstr[x++] = 'x';
 963         if (sparse_files)
 964                 argstr[x++] = 'S';
 965         if (do_compression)
 966                 argstr[x++] = 'z';
 967
 968         /* this is a complete hack - blame Rusty
 969
 970            this is a hack to make the list_only (remote file list)
 971            more useful */
 972         if (list_only && !recurse)
 973                 argstr[x++] = 'r';
 974
 975         argstr[x] = 0;
 976
 977         if (x != 1)
 978                 args[ac++] = argstr;
 979
 980         if (block_size) {
 981                 if (asprintf(&arg, "-B%u", block_size) < 0)
 982                         goto oom;
 983                 args[ac++] = arg;
 984         }
 985
 986         if (max_delete && am_sender) {
 987                 if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
 988                         goto oom;
 989                 args[ac++] = arg;
 990         }
 991
 992         if (io_timeout) {
 993                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
 994                         goto oom;
 995                 args[ac++] = arg;
 996         }
 997
 998         if (bwlimit) {
 999                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
1000                         goto oom;
1001                 args[ac++] = arg;
1002         }
1003
1004         if (backup_dir) {
1005                 args[ac++] = "--backup-dir";
1006                 args[ac++] = backup_dir;
1007         }
1008
1009         /* Only send --suffix if it specifies a non-default value. */
1010         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
1011                 /* We use the following syntax to avoid weirdness with '~'. */
1012                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
1013                         goto oom;
1014                 args[ac++] = arg;
1015         }
1016
1017         if (am_sender) {
1018                 if (delete_excluded)
1019                         args[ac++] = "--delete-excluded";
1020                 else if (delete_mode)
1021                         args[ac++] = "--delete";
1022
1023                 if (delete_after)
1024                         args[ac++] = "--delete-after";
1025
1026                 if (force_delete)
1027                         args[ac++] = "--force";
1028         }
1029
1030         if (size_only)
1031                 args[ac++] = "--size-only";
1032
1033         if (modify_window_set) {
1034                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
1035                         goto oom;
1036                 args[ac++] = arg;
1037         }
1038
1039         if (checksum_seed) {
1040                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
1041                         goto oom;
1042                 args[ac++] = arg;
1043         }
1044
1045         if (partial_dir && am_sender) {
1046                 args[ac++] = "--partial-dir";
1047                 args[ac++] = partial_dir;
1048         } else if (keep_partial)
1049                 args[ac++] = "--partial";
1050
1051         if (ignore_errors)
1052                 args[ac++] = "--ignore-errors";
1053
1054         if (copy_unsafe_links)
1055                 args[ac++] = "--copy-unsafe-links";
1056
1057         if (safe_symlinks)
1058                 args[ac++] = "--safe-links";
1059
1060         if (numeric_ids)
1061                 args[ac++] = "--numeric-ids";
1062
1063         if (only_existing && am_sender)
1064                 args[ac++] = "--existing";
1065
1066         if (opt_ignore_existing && am_sender)
1067                 args[ac++] = "--ignore-existing";
1068
1069         if (inplace)
1070                 args[ac++] = "--inplace";
1071
1072         if (tmpdir) {
1073                 args[ac++] = "--temp-dir";
1074                 args[ac++] = tmpdir;
1075         }
1076
1077         if (compare_dest && am_sender) {
1078                 /* the server only needs this option if it is not the sender,
1079                  *   and it may be an older version that doesn't know this
1080                  *   option, so don't send it if client is the sender.
1081                  */
1082                 args[ac++] = link_dest ? "--link-dest" : "--compare-dest";
1083                 args[ac++] = compare_dest;
1084         }
1085
1086         if (files_from && (!am_sender || remote_filesfrom_file)) {
1087                 if (remote_filesfrom_file) {
1088                         args[ac++] = "--files-from";
1089                         args[ac++] = remote_filesfrom_file;
1090                         if (eol_nulls)
1091                                 args[ac++] = "--from0";
1092                 } else {
1093                         args[ac++] = "--files-from=-";
1094                         args[ac++] = "--from0";
1095                 }
1096         }
1097
1098         *argc = ac;
1099         return;
1100
1101     oom:
1102         out_of_memory("server_options");
1103 }
1104
1105 /**
1106  * Return the position of a ':' IF it is not part of a filename (i.e. as
1107  * long as it doesn't occur after a slash.
1108  */
1109 char *find_colon(char *s)
1110 {
1111         char *p, *p2;
1112
1113         p = strchr(s,':');
1114         if (!p)
1115                 return NULL;
1116
1117         /* now check to see if there is a / in the string before the : - if there is then
1118            discard the colon on the assumption that the : is part of a filename */
1119         p2 = strchr(s,'/');
1120         if (p2 && p2 < p)
1121                 return NULL;
1122
1123         return p;
1124 }