options.c

   1 /*
   2  * Command-line (and received via daemon-socket) option parsing.
   3  *
   4  * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
   5  * Copyright (C) 2000, 2001, 2002 Martin Pool <mbp@samba.org>
   6  * Copyright (C) 2002, 2003, 2004, 2005, 2006 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  21  */
  22
  23 #include "rsync.h"
  24 #include <popt.h>
  25 #include "zlib/zlib.h"
  26
  27 extern int module_id;
  28 extern int sanitize_paths;
  29 extern struct filter_list_struct filter_list;
  30 extern struct filter_list_struct server_filter_list;
  31
  32 int make_backups = 0;
  33
  34 /**
  35  * If 1, send the whole file as literal data rather than trying to
  36  * create an incremental diff.
  37  *
  38  * If -1, then look at whether we're local or remote and go by that.
  39  *
  40  * @sa disable_deltas_p()
  41  **/
  42 int whole_file = -1;
  43
  44 int append_mode = 0;
  45 int keep_dirlinks = 0;
  46 int copy_dirlinks = 0;
  47 int copy_links = 0;
  48 int preserve_links = 0;
  49 int preserve_hard_links = 0;
  50 int preserve_perms = 0;
  51 int preserve_executability = 0;
  52 int preserve_devices = 0;
  53 int preserve_specials = 0;
  54 int preserve_uid = 0;
  55 int preserve_gid = 0;
  56 int preserve_times = 0;
  57 int omit_dir_times = 0;
  58 int update_only = 0;
  59 int cvs_exclude = 0;
  60 int dry_run = 0;
  61 int do_xfers = 1;
  62 int ignore_times = 0;
  63 int delete_mode = 0;
  64 int delete_during = 0;
  65 int delete_before = 0;
  66 int delete_after = 0;
  67 int delete_excluded = 0;
  68 int remove_sender_files = 0;
  69 int one_file_system = 0;
  70 int protocol_version = PROTOCOL_VERSION;
  71 int sparse_files = 0;
  72 int do_compression = 0;
  73 int def_compress_level = Z_DEFAULT_COMPRESSION;
  74 int am_root = 0;
  75 int am_server = 0;
  76 int am_sender = 0;
  77 int am_generator = 0;
  78 int am_starting_up = 1;
  79 int relative_paths = -1;
  80 int implied_dirs = 1;
  81 int numeric_ids = 0;
  82 int allow_8bit_chars = 0;
  83 int force_delete = 0;
  84 int io_timeout = 0;
  85 int allowed_lull = 0;
  86 int prune_empty_dirs = 0;
  87 char *files_from = NULL;
  88 int filesfrom_fd = -1;
  89 char *filesfrom_host = NULL;
  90 int eol_nulls = 0;
  91 int human_readable = 0;
  92 int recurse = 0;
  93 int xfer_dirs = -1;
  94 int am_daemon = 0;
  95 int daemon_over_rsh = 0;
  96 int do_stats = 0;
  97 int do_progress = 0;
  98 int keep_partial = 0;
  99 int safe_symlinks = 0;
 100 int copy_unsafe_links = 0;
 101 int size_only = 0;
 102 int daemon_bwlimit = 0;
 103 int bwlimit = 0;
 104 int fuzzy_basis = 0;
 105 size_t bwlimit_writemax = 0;
 106 int ignore_existing = 0;
 107 int ignore_non_existing = 0;
 108 int need_messages_from_generator = 0;
 109 int max_delete = 0;
 110 OFF_T max_size = 0;
 111 OFF_T min_size = 0;
 112 int ignore_errors = 0;
 113 int modify_window = 0;
 114 int blocking_io = -1;
 115 int checksum_seed = 0;
 116 int inplace = 0;
 117 int delay_updates = 0;
 118 long block_size = 0; /* "long" because popt can't set an int32. */
 119
 120
 121 /** Network address family. **/
 122 #ifdef INET6
 123 int default_af_hint = 0;        /* Any protocol */
 124 #else
 125 int default_af_hint = AF_INET;  /* Must use IPv4 */
 126 #endif
 127
 128 /** Do not go into the background when run as --daemon.  Good
 129  * for debugging and required for running as a service on W32,
 130  * or under Unix process-monitors. **/
 131 int no_detach
 132 #if defined _WIN32 || defined __WIN32__
 133         = 1;
 134 #else
 135         = 0;
 136 #endif
 137
 138 int write_batch = 0;
 139 int read_batch = 0;
 140 int backup_dir_len = 0;
 141 int backup_suffix_len;
 142 unsigned int backup_dir_remainder;
 143
 144 char *backup_suffix = NULL;
 145 char *tmpdir = NULL;
 146 char *partial_dir = NULL;
 147 char *basis_dir[MAX_BASIS_DIRS+1];
 148 char *config_file = NULL;
 149 char *shell_cmd = NULL;
 150 char *logfile_name = NULL;
 151 char *logfile_format = NULL;
 152 char *stdout_format = NULL;
 153 char *password_file = NULL;
 154 char *rsync_path = RSYNC_PATH;
 155 char *backup_dir = NULL;
 156 char backup_dir_buf[MAXPATHLEN];
 157 char *sockopts = NULL;
 158 int rsync_port = 0;
 159 int compare_dest = 0;
 160 int copy_dest = 0;
 161 int link_dest = 0;
 162 int basis_dir_cnt = 0;
 163 char *dest_option = NULL;
 164
 165 int verbose = 0;
 166 int quiet = 0;
 167 int log_before_transfer = 0;
 168 int stdout_format_has_i = 0;
 169 int stdout_format_has_o_or_i = 0;
 170 int logfile_format_has_i = 0;
 171 int logfile_format_has_o_or_i = 0;
 172 int always_checksum = 0;
 173 int list_only = 0;
 174
 175 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 176 char *batch_name = NULL;
 177
 178 struct chmod_mode_struct *chmod_modes = NULL;
 179
 180 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 181 static int F_option_cnt = 0;
 182 static int modify_window_set;
 183 static int itemize_changes = 0;
 184 static int refused_delete, refused_archive_part, refused_compress;
 185 static int refused_partial, refused_progress, refused_delete_before;
 186 static int refused_inplace;
 187 static char *max_size_arg, *min_size_arg;
 188 static char tmp_partialdir[] = ".~tmp~";
 189
 190 /** Local address to bind.  As a character string because it's
 191  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 192  * address, or a hostname. **/
 193 char *bind_address;
 194
 195
 196 static void print_rsync_version(enum logcode f)
 197 {
 198         char const *got_socketpair = "no ";
 199         char const *have_inplace = "no ";
 200         char const *hardlinks = "no ";
 201         char const *links = "no ";
 202         char const *ipv6 = "no ";
 203         STRUCT_STAT *dumstat;
 204
 205 #ifdef HAVE_SOCKETPAIR
 206         got_socketpair = "";
 207 #endif
 208
 209 #ifdef HAVE_FTRUNCATE
 210         have_inplace = "";
 211 #endif
 212
 213 #ifdef SUPPORT_HARD_LINKS
 214         hardlinks = "";
 215 #endif
 216
 217 #ifdef SUPPORT_LINKS
 218         links = "";
 219 #endif
 220
 221 #ifdef INET6
 222         ipv6 = "";
 223 #endif
 224
 225         rprintf(f, "%s  version %s  protocol version %d\n",
 226                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION);
 227         rprintf(f, "Copyright (C) 1996-2006 by Andrew Tridgell, Wayne Davison, and others.\n");
 228         rprintf(f, "<http://rsync.samba.org/>\n");
 229         rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, "
 230                 "%shard links, %ssymlinks, batchfiles,\n",
 231                 (int) (sizeof (OFF_T) * 8),
 232                 got_socketpair, hardlinks, links);
 233
 234         /* Note that this field may not have type ino_t.  It depends
 235          * on the complicated interaction between largefile feature
 236          * macros. */
 237         rprintf(f, "              %sinplace, %sIPv6, "
 238                 "%d-bit system inums, %d-bit internal inums\n",
 239                 have_inplace, ipv6,
 240                 (int) (sizeof dumstat->st_ino * 8),
 241                 (int) (sizeof (int64) * 8));
 242 #ifdef MAINTAINER_MODE
 243         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 244 #endif
 245
 246 #if SIZEOF_INT64 < 8
 247         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 248 #endif
 249         if (sizeof (int64) != SIZEOF_INT64) {
 250                 rprintf(f,
 251                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 252                         (int) SIZEOF_INT64, (int) sizeof (int64));
 253         }
 254
 255         rprintf(f,"\n");
 256         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 257         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 258         rprintf(f,"General Public Licence for details.\n");
 259 }
 260
 261
 262 void usage(enum logcode F)
 263 {
 264   print_rsync_version(F);
 265
 266   rprintf(F,"\n");
 267   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 268   rprintf(F,"via a fast differencing algorithm.\n");
 269
 270   rprintf(F,"\n");
 271   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 272   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 273   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 274   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 275   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 276   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 277   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 278   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 279   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 280   rprintf(F,"\n");
 281   rprintf(F,"Options\n");
 282   rprintf(F," -v, --verbose               increase verbosity\n");
 283   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 284   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 285   rprintf(F," -a, --archive               archive mode; same as -rlptgoD (no -H)\n");
 286   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 287   rprintf(F," -r, --recursive             recurse into directories\n");
 288   rprintf(F," -R, --relative              use relative path names\n");
 289   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 290   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 291   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 292   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 293   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 294   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 295   rprintf(F,"     --append                append data onto shorter files\n");
 296   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 297   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 298   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 299   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 300   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 301   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 302   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 303   rprintf(F," -H, --hard-links            preserve hard links\n");
 304   rprintf(F," -p, --perms                 preserve permissions\n");
 305   rprintf(F," -E, --executability         preserve the file's executability\n");
 306   rprintf(F,"     --chmod=CHMOD           change destination permissions\n");
 307   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 308   rprintf(F," -g, --group                 preserve group\n");
 309   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 310   rprintf(F,"     --specials              preserve special files\n");
 311   rprintf(F," -D                          same as --devices --specials\n");
 312   rprintf(F," -t, --times                 preserve times\n");
 313   rprintf(F," -O, --omit-dir-times        omit directories when preserving times\n");
 314   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 315   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 316   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 317   rprintf(F," -W, --whole-file            copy files whole (without rsync algorithm)\n");
 318   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 319   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 320   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 321   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 322   rprintf(F,"     --existing              skip creating new files on receiver\n");
 323   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 324   rprintf(F,"     --remove-sender-files   sender removes synchronized files (non-dirs)\n");
 325   rprintf(F,"     --del                   an alias for --delete-during\n");
 326   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 327   rprintf(F,"     --delete-before         receiver deletes before transfer (default)\n");
 328   rprintf(F,"     --delete-during         receiver deletes during transfer, not before\n");
 329   rprintf(F,"     --delete-after          receiver deletes after transfer, not before\n");
 330   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 331   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 332   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 333   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 334   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 335   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 336   rprintf(F,"     --partial               keep partially transferred files\n");
 337   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 338   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 339   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 340   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 341   rprintf(F,"     --timeout=TIME          set I/O timeout in seconds\n");
 342   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 343   rprintf(F,"     --size-only             skip files that match in size\n");
 344   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
 345   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 346   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 347   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 348   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 349   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 350   rprintf(F," -z, --compress              compress file data during the transfer\n");
 351   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 352   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 353   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 354   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 355   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 356   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 357   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 358   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 359   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 360   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 361   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 362   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 363   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 364   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 365   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 366   rprintf(F,"     --stats                 give some file-transfer stats\n");
 367   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 368   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 369   rprintf(F,"     --progress              show progress during transfer\n");
 370   rprintf(F," -P                          same as --partial --progress\n");
 371   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 372   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 373   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 374   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 375   rprintf(F,"     --password-file=FILE    read password from FILE\n");
 376   rprintf(F,"     --list-only             list the files instead of copying them\n");
 377   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 378   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 379   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 380   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 381   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 382 #ifdef INET6
 383   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 384   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 385 #endif
 386   rprintf(F,"     --version               print version number\n");
 387   rprintf(F,"(-h) --help                  show this help (-h works with no other options)\n");
 388
 389   rprintf(F,"\n");
 390   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 391   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 392   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 393 }
 394
 395 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 396       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 397       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 398       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 399       OPT_NO_D,
 400       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 401
 402 static struct poptOption long_options[] = {
 403   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 404   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 405   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 406   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 407   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 408   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 409   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 410   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 411   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 412   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 413   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 414   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 415   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 416   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 417   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 418   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 419   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 420   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 421   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 422   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 423   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 424   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 425   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 426   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 427   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 2, 0, 0 },
 428   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 429   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 430   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 431   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 432   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 433   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 434   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 435   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 436   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 437   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 438   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 439   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 440   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 441   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 442   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 443   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 444   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 445   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 446   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 447   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 448   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 449   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 450   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 451   {"hard-links",      'H', POPT_ARG_VAL,    &preserve_hard_links, 1, 0, 0 },
 452   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 453   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 454   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 455   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 456   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 457   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 458   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 459   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 460   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 461   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 462   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 463   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 464   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 465   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 466   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 467   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 468   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 469   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files, 0, 0, 0 },
 470   {"inplace",          0,  POPT_ARG_NONE,   &inplace, 0, 0, 0 },
 471   {"append",           0,  POPT_ARG_VAL,    &append_mode, 1, 0, 0 },
 472   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 473   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 474   {"delete-before",    0,  POPT_ARG_VAL,    &delete_before, 2, 0, 0 },
 475   {"delete-during",    0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 476   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 477   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 478   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_sender_files, 2, 0, 0 }, /* deprecated */
 479   {"remove-sender-files",0,POPT_ARG_VAL,    &remove_sender_files, 1, 0, 0 },
 480   {"force",            0,  POPT_ARG_NONE,   &force_delete, 0, 0, 0 },
 481   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors, 0, 0, 0 },
 482   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 483   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 484   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 485   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 486   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 487   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 488   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 489   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 490   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 491   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 492   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 493   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum, 0, 0, 0 },
 494   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 495   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 496   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 497   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 498   {"fuzzy",           'y', POPT_ARG_NONE,   &fuzzy_basis, 0, 0, 0 },
 499   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 500   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
 501   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 502   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 503   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 504   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 505   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 506   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 507   {"delay-updates",    0,  POPT_ARG_NONE,   &delay_updates, 0, 0, 0 },
 508   {"prune-empty-dirs",'m', POPT_ARG_NONE,   &prune_empty_dirs, 0, 0, 0 },
 509   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 510   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 511   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 512   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 513   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 514   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
 515   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
 516   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 517   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 518   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 519   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 520   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 521   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 522   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 523   {"from0",           '0', POPT_ARG_NONE,   &eol_nulls, 0, 0, 0},
 524   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids, 0, 0, 0 },
 525   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
 526   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 527   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 528   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 529 #ifdef INET6
 530   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 531   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 532 #endif
 533   {"8-bit-output",    '8', POPT_ARG_NONE,   &allow_8bit_chars, 0, 0, 0 },
 534   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 535   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 536   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
 537   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
 538   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
 539   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
 540   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 541   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
 542   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
 543   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
 544   /* All the following options switch us into daemon-mode option-parsing. */
 545   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
 546   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 547   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 548   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 549   {0,0,0,0, 0, 0, 0}
 550 };
 551
 552 static void daemon_usage(enum logcode F)
 553 {
 554   print_rsync_version(F);
 555
 556   rprintf(F,"\n");
 557   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
 558   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
 559   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 560   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 561   rprintf(F,"     --no-detach             do not detach from the parent\n");
 562   rprintf(F,"     --port=PORT             listen on alternate port number\n");
 563   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
 564   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
 565   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 566   rprintf(F," -v, --verbose               increase verbosity\n");
 567 #ifdef INET6
 568   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 569   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 570 #endif
 571   rprintf(F,"     --help                  show this help screen\n");
 572
 573   rprintf(F,"\n");
 574   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
 575   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
 576 }
 577
 578 static struct poptOption long_daemon_options[] = {
 579   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 580   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 581   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
 582   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
 583   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
 584 #ifdef INET6
 585   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 586   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 587 #endif
 588   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
 589   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 590   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 591   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
 592   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 593   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
 594   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 595   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
 596   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 597   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 598   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 599   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 600   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
 601   {0,0,0,0, 0, 0, 0}
 602 };
 603
 604
 605 static char err_buf[200];
 606
 607
 608 /**
 609  * Store the option error message, if any, so that we can log the
 610  * connection attempt (which requires parsing the options), and then
 611  * show the error later on.
 612  **/
 613 void option_error(void)
 614 {
 615         if (!err_buf[0]) {
 616                 strcpy(err_buf, "Error parsing options: "
 617                     "option may be supported on client but not on server?\n");
 618         }
 619
 620         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
 621         msleep(20);
 622 }
 623
 624
 625 /**
 626  * Tweak the option table to disable all options that the rsyncd.conf
 627  * file has told us to refuse.
 628  **/
 629 static void set_refuse_options(char *bp)
 630 {
 631         struct poptOption *op;
 632         char *cp, shortname[2];
 633         int is_wild, found_match;
 634
 635         shortname[1] = '\0';
 636
 637         while (1) {
 638                 while (*bp == ' ') bp++;
 639                 if (!*bp)
 640                         break;
 641                 if ((cp = strchr(bp, ' ')) != NULL)
 642                         *cp= '\0';
 643                 is_wild = strpbrk(bp, "*?[") != NULL;
 644                 found_match = 0;
 645                 for (op = long_options; ; op++) {
 646                         *shortname = op->shortName;
 647                         if (!op->longName && !*shortname)
 648                                 break;
 649                         if ((op->longName && wildmatch(bp, op->longName))
 650                             || (*shortname && wildmatch(bp, shortname))) {
 651                                 if (op->argInfo == POPT_ARG_VAL)
 652                                         op->argInfo = POPT_ARG_NONE;
 653                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
 654                                 found_match = 1;
 655                                 /* These flags are set to let us easily check
 656                                  * an implied option later in the code. */
 657                                 switch (*shortname) {
 658                                 case 'r': case 'd': case 'l': case 'p':
 659                                 case 't': case 'g': case 'o': case 'D':
 660                                         refused_archive_part = op->val;
 661                                         break;
 662                                 case 'z':
 663                                         refused_compress = op->val;
 664                                         break;
 665                                 case '\0':
 666                                         if (wildmatch("delete", op->longName))
 667                                                 refused_delete = op->val;
 668                                         else if (wildmatch("delete-before", op->longName))
 669                                                 refused_delete_before = op->val;
 670                                         else if (wildmatch("partial", op->longName))
 671                                                 refused_partial = op->val;
 672                                         else if (wildmatch("progress", op->longName))
 673                                                 refused_progress = op->val;
 674                                         else if (wildmatch("inplace", op->longName))
 675                                                 refused_inplace = op->val;
 676                                         break;
 677                                 }
 678                                 if (!is_wild)
 679                                         break;
 680                         }
 681                 }
 682                 if (!found_match) {
 683                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
 684                                 bp);
 685                 }
 686                 if (!cp)
 687                         break;
 688                 *cp = ' ';
 689                 bp = cp + 1;
 690         }
 691 }
 692
 693
 694 static int count_args(const char **argv)
 695 {
 696         int i = 0;
 697
 698         if (argv) {
 699                 while (argv[i] != NULL)
 700                         i++;
 701         }
 702
 703         return i;
 704 }
 705
 706
 707 static OFF_T parse_size_arg(char **size_arg, char def_suf)
 708 {
 709         int reps, mult, make_compatible = 0;
 710         const char *arg;
 711         OFF_T size = 1;
 712
 713         for (arg = *size_arg; isdigit(*(uchar*)arg); arg++) {}
 714         if (*arg == '.')
 715                 for (arg++; isdigit(*(uchar*)arg); arg++) {}
 716         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
 717         case 'b': case 'B':
 718                 reps = 0;
 719                 break;
 720         case 'k': case 'K':
 721                 reps = 1;
 722                 break;
 723         case 'm': case 'M':
 724                 reps = 2;
 725                 break;
 726         case 'g': case 'G':
 727                 reps = 3;
 728                 break;
 729         default:
 730                 return -1;
 731         }
 732         if (*arg == 'b' || *arg == 'B')
 733                 mult = 1000, make_compatible = 1, arg++;
 734         else if (!*arg || *arg == '+' || *arg == '-')
 735                 mult = 1024;
 736         else if (strncasecmp(arg, "ib", 2) == 0)
 737                 mult = 1024, arg += 2;
 738         else
 739                 return -1;
 740         while (reps--)
 741                 size *= mult;
 742         size *= atof(*size_arg);
 743         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
 744                 size += atoi(arg), make_compatible = 1, arg += 2;
 745         if (*arg)
 746                 return -1;
 747         if (size > 0 && make_compatible) {
 748                 /* We convert this manually because we may need %lld precision,
 749                  * and that's not a portable sprintf() escape. */
 750                 char buf[128], *s = buf + sizeof buf - 1;
 751                 OFF_T num = size;
 752                 *s = '\0';
 753                 while (num) {
 754                         *--s = (num % 10) + '0';
 755                         num /= 10;
 756                 }
 757                 if (!(*size_arg = strdup(s)))
 758                         out_of_memory("parse_size_arg");
 759         }
 760         return size;
 761 }
 762
 763
 764 static void create_refuse_error(int which)
 765 {
 766         /* The "which" value is the index + OPT_REFUSED_BASE. */
 767         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
 768         int n = snprintf(err_buf, sizeof err_buf,
 769                          "The server is configured to refuse --%s\n",
 770                          op->longName) - 1;
 771         if (op->shortName) {
 772                 snprintf(err_buf + n, sizeof err_buf - n,
 773                          " (-%c)\n", op->shortName);
 774         }
 775 }
 776
 777
 778 /**
 779  * Process command line arguments.  Called on both local and remote.
 780  *
 781  * @retval 1 if all options are OK; with globals set to appropriate
 782  * values
 783  *
 784  * @retval 0 on error, with err_buf containing an explanation
 785  **/
 786 int parse_arguments(int *argc, const char ***argv, int frommain)
 787 {
 788         int opt;
 789         char *ref = lp_refuse_options(module_id);
 790         const char *arg;
 791         poptContext pc;
 792
 793         if (ref && *ref)
 794                 set_refuse_options(ref);
 795         if (am_daemon)
 796                 set_refuse_options("log-file*");
 797
 798         /* TODO: Call poptReadDefaultConfig; handle errors. */
 799
 800         /* The context leaks in case of an error, but if there's a
 801          * problem we always exit anyhow. */
 802         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
 803         poptReadDefaultConfig(pc, 0);
 804
 805         while ((opt = poptGetNextOpt(pc)) != -1) {
 806                 /* most options are handled automatically by popt;
 807                  * only special cases are returned and listed here. */
 808
 809                 switch (opt) {
 810                 case OPT_VERSION:
 811                         print_rsync_version(FINFO);
 812                         exit_cleanup(0);
 813
 814                 case OPT_SERVER:
 815                         if (!am_server) {
 816                                 /* Disable popt aliases on the server side and
 817                                  * then start parsing the options again. */
 818                                 poptFreeContext(pc);
 819                                 pc = poptGetContext(RSYNC_NAME, *argc, *argv,
 820                                                     long_options, 0);
 821                                 am_server = 1;
 822                         }
 823                         break;
 824
 825                 case OPT_SENDER:
 826                         if (!am_server) {
 827                                 usage(FERROR);
 828                                 exit_cleanup(RERR_SYNTAX);
 829                         }
 830                         am_sender = 1;
 831                         break;
 832
 833                 case OPT_DAEMON:
 834                         if (am_daemon) {
 835                                 strcpy(err_buf, "Attempt to hack rsync thwarted!\n");
 836                                 return 0;
 837                         }
 838                         poptFreeContext(pc);
 839                         pc = poptGetContext(RSYNC_NAME, *argc, *argv,
 840                                             long_daemon_options, 0);
 841                         while ((opt = poptGetNextOpt(pc)) != -1) {
 842                                 switch (opt) {
 843                                 case 'h':
 844                                         daemon_usage(FINFO);
 845                                         exit_cleanup(0);
 846
 847                                 case 'v':
 848                                         verbose++;
 849                                         break;
 850
 851                                 default:
 852                                         rprintf(FERROR,
 853                                             "rsync: %s: %s (in daemon mode)\n",
 854                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 855                                             poptStrerror(opt));
 856                                         goto daemon_error;
 857                                 }
 858                         }
 859
 860                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
 861                                 snprintf(err_buf, sizeof err_buf,
 862                                          "the --temp-dir path is WAY too long.\n");
 863                                 return 0;
 864                         }
 865
 866                         if (!daemon_opt) {
 867                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
 868                             daemon_error:
 869                                 rprintf(FERROR,
 870                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
 871                                 exit_cleanup(RERR_SYNTAX);
 872                         }
 873
 874                         *argv = poptGetArgs(pc);
 875                         *argc = count_args(*argv);
 876                         am_starting_up = 0;
 877                         daemon_opt = 0;
 878                         am_daemon = 1;
 879                         return 1;
 880
 881                 case OPT_MODIFY_WINDOW:
 882                         /* The value has already been set by popt, but
 883                          * we need to remember that we're using a
 884                          * non-default setting. */
 885                         modify_window_set = 1;
 886                         break;
 887
 888                 case OPT_FILTER:
 889                         parse_rule(&filter_list, poptGetOptArg(pc), 0, 0);
 890                         break;
 891
 892                 case OPT_EXCLUDE:
 893                         parse_rule(&filter_list, poptGetOptArg(pc),
 894                                    0, XFLG_OLD_PREFIXES);
 895                         break;
 896
 897                 case OPT_INCLUDE:
 898                         parse_rule(&filter_list, poptGetOptArg(pc),
 899                                    MATCHFLG_INCLUDE, XFLG_OLD_PREFIXES);
 900                         break;
 901
 902                 case OPT_EXCLUDE_FROM:
 903                 case OPT_INCLUDE_FROM:
 904                         arg = poptGetOptArg(pc);
 905                         if (sanitize_paths) {
 906                                 arg = sanitize_path(NULL, arg, NULL, 0, NULL);
 907                                 die_on_unsafe_path((char*)arg, 0);
 908                         }
 909                         if (server_filter_list.head) {
 910                                 char *cp = strdup(arg);
 911                                 if (!cp)
 912                                         out_of_memory("parse_arguments");
 913                                 if (!*cp)
 914                                         goto options_rejected;
 915                                 clean_fname(cp, 1);
 916                                 if (check_filter(&server_filter_list, cp, 0) < 0)
 917                                         goto options_rejected;
 918                                 free(cp);
 919                         }
 920                         parse_filter_file(&filter_list, arg,
 921                                 opt == OPT_INCLUDE_FROM ? MATCHFLG_INCLUDE : 0,
 922                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
 923                         break;
 924
 925                 case 'a':
 926                         if (refused_archive_part) {
 927                                 create_refuse_error(refused_archive_part);
 928                                 return 0;
 929                         }
 930                         if (!recurse) /* preserve recurse == 2 */
 931                                 recurse = 1;
 932 #ifdef SUPPORT_LINKS
 933                         preserve_links = 1;
 934 #endif
 935                         preserve_perms = 1;
 936                         preserve_times = 1;
 937                         preserve_gid = 1;
 938                         preserve_uid = 1;
 939                         preserve_devices = 1;
 940                         preserve_specials = 1;
 941                         break;
 942
 943                 case 'D':
 944                         preserve_devices = preserve_specials = 1;
 945                         break;
 946
 947                 case OPT_NO_D:
 948                         preserve_devices = preserve_specials = 0;
 949                         break;
 950
 951                 case 'h':
 952                         human_readable++;
 953                         break;
 954
 955                 case 'i':
 956                         itemize_changes++;
 957                         break;
 958
 959                 case 'v':
 960                         verbose++;
 961                         break;
 962
 963                 case 'q':
 964                         if (frommain)
 965                                 quiet++;
 966                         break;
 967
 968                 case 'x':
 969                         one_file_system++;
 970                         break;
 971
 972                 case 'F':
 973                         switch (++F_option_cnt) {
 974                         case 1:
 975                                 parse_rule(&filter_list,": /.rsync-filter",0,0);
 976                                 break;
 977                         case 2:
 978                                 parse_rule(&filter_list,"- .rsync-filter",0,0);
 979                                 break;
 980                         }
 981                         break;
 982
 983                 case 'P':
 984                         if (refused_partial || refused_progress) {
 985                                 create_refuse_error(refused_partial
 986                                     ? refused_partial : refused_progress);
 987                                 return 0;
 988                         }
 989                         do_progress = 1;
 990                         keep_partial = 1;
 991                         break;
 992
 993                 case 'z':
 994                         if (def_compress_level < Z_DEFAULT_COMPRESSION
 995                          || def_compress_level > Z_BEST_COMPRESSION) {
 996                                 snprintf(err_buf, sizeof err_buf,
 997                                         "--compress-level value is invalid: %d\n",
 998                                         def_compress_level);
 999                                 return 0;
1000                         }
1001                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1002                         if (do_compression && refused_compress) {
1003                                 create_refuse_error(refused_compress);
1004                                 return 0;
1005                         }
1006                         break;
1007
1008                 case OPT_WRITE_BATCH:
1009                         /* batch_name is already set */
1010                         write_batch = 1;
1011                         break;
1012
1013                 case OPT_ONLY_WRITE_BATCH:
1014                         /* batch_name is already set */
1015                         write_batch = -1;
1016                         break;
1017
1018                 case OPT_READ_BATCH:
1019                         /* batch_name is already set */
1020                         read_batch = 1;
1021                         break;
1022
1023                 case OPT_MAX_SIZE:
1024                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
1025                                 snprintf(err_buf, sizeof err_buf,
1026                                         "--max-size value is invalid: %s\n",
1027                                         max_size_arg);
1028                                 return 0;
1029                         }
1030                         break;
1031
1032                 case OPT_MIN_SIZE:
1033                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
1034                                 snprintf(err_buf, sizeof err_buf,
1035                                         "--min-size value is invalid: %s\n",
1036                                         min_size_arg);
1037                                 return 0;
1038                         }
1039                         break;
1040
1041                 case OPT_LINK_DEST:
1042 #ifdef SUPPORT_HARD_LINKS
1043                         link_dest = 1;
1044                         dest_option = "--link-dest";
1045                         goto set_dest_dir;
1046 #else
1047                         snprintf(err_buf, sizeof err_buf,
1048                                  "hard links are not supported on this %s\n",
1049                                  am_server ? "server" : "client");
1050                         return 0;
1051 #endif
1052
1053                 case OPT_COPY_DEST:
1054                         copy_dest = 1;
1055                         dest_option = "--copy-dest";
1056                         goto set_dest_dir;
1057
1058                 case OPT_COMPARE_DEST:
1059                         compare_dest = 1;
1060                         dest_option = "--compare-dest";
1061                 set_dest_dir:
1062                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1063                                 snprintf(err_buf, sizeof err_buf,
1064                                         "ERROR: at most %d %s args may be specified\n",
1065                                         MAX_BASIS_DIRS, dest_option);
1066                                 return 0;
1067                         }
1068                         /* We defer sanitizing this arg until we know what
1069                          * our destination directory is going to be. */
1070                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1071                         break;
1072
1073                 case OPT_CHMOD:
1074                         arg = poptGetOptArg(pc);
1075                         if (!parse_chmod(arg, &chmod_modes)) {
1076                                 snprintf(err_buf, sizeof err_buf,
1077                                     "Invalid argument passed to --chmod (%s)\n",
1078                                     arg);
1079                                 return 0;
1080                         }
1081                         break;
1082
1083                 case OPT_HELP:
1084                         usage(FINFO);
1085                         exit_cleanup(0);
1086
1087                 default:
1088                         /* A large opt value means that set_refuse_options()
1089                          * turned this option off. */
1090                         if (opt >= OPT_REFUSED_BASE) {
1091                                 create_refuse_error(opt);
1092                                 return 0;
1093                         }
1094                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1095                                  am_server ? "on remote machine: " : "",
1096                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1097                                  poptStrerror(opt));
1098                         return 0;
1099                 }
1100         }
1101
1102         if (human_readable && *argc == 2) {
1103                 /* Allow the old meaning of 'h' (--help) on its own. */
1104                 usage(FINFO);
1105                 exit_cleanup(0);
1106         }
1107
1108 #ifndef SUPPORT_LINKS
1109         if (preserve_links && !am_sender) {
1110                 snprintf(err_buf, sizeof err_buf,
1111                          "symlinks are not supported on this %s\n",
1112                          am_server ? "server" : "client");
1113                 return 0;
1114         }
1115 #endif
1116
1117 #ifndef SUPPORT_HARD_LINKS
1118         if (preserve_hard_links) {
1119                 snprintf(err_buf, sizeof err_buf,
1120                          "hard links are not supported on this %s\n",
1121                          am_server ? "server" : "client");
1122                 return 0;
1123         }
1124 #endif
1125
1126         if (write_batch && read_batch) {
1127                 snprintf(err_buf, sizeof err_buf,
1128                         "--write-batch and --read-batch can not be used together\n");
1129                 return 0;
1130         }
1131         if (write_batch > 0 || read_batch) {
1132                 if (am_server) {
1133                         rprintf(FINFO,
1134                                 "ignoring --%s-batch option sent to server\n",
1135                                 write_batch ? "write" : "read");
1136                         /* We don't actually exit_cleanup(), so that we can
1137                          * still service older version clients that still send
1138                          * batch args to server. */
1139                         read_batch = write_batch = 0;
1140                         batch_name = NULL;
1141                 } else if (dry_run)
1142                         write_batch = 0;
1143         }
1144         if (read_batch && files_from) {
1145                 snprintf(err_buf, sizeof err_buf,
1146                         "--read-batch cannot be used with --files-from\n");
1147                 return 0;
1148         }
1149         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1150                 snprintf(err_buf, sizeof err_buf,
1151                         "the batch-file name must be %d characters or less.\n",
1152                         MAX_BATCH_NAME_LEN);
1153                 return 0;
1154         }
1155
1156         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1157                 snprintf(err_buf, sizeof err_buf,
1158                          "the --temp-dir path is WAY too long.\n");
1159                 return 0;
1160         }
1161
1162         if (compare_dest + copy_dest + link_dest > 1) {
1163                 snprintf(err_buf, sizeof err_buf,
1164                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1165                 return 0;
1166         }
1167
1168         if (files_from) {
1169                 if (recurse == 1) /* preserve recurse == 2 */
1170                         recurse = 0;
1171                 if (xfer_dirs < 0)
1172                         xfer_dirs = 1;
1173         }
1174
1175         if (xfer_dirs < 1)
1176                 xfer_dirs = recurse || list_only;
1177
1178         if (relative_paths < 0)
1179                 relative_paths = files_from? 1 : 0;
1180         if (!relative_paths)
1181                 implied_dirs = 0;
1182
1183         if (!!delete_before + delete_during + delete_after > 1) {
1184                 snprintf(err_buf, sizeof err_buf,
1185                         "You may not combine multiple --delete-WHEN options.\n");
1186                 return 0;
1187         }
1188         if (delete_before || delete_during || delete_after)
1189                 delete_mode = 1;
1190         else if (delete_mode || delete_excluded) {
1191                 if (refused_delete_before) {
1192                         create_refuse_error(refused_delete_before);
1193                         return 0;
1194                 }
1195                 delete_mode = delete_before = 1;
1196         }
1197         if (!xfer_dirs && delete_mode) {
1198                 snprintf(err_buf, sizeof err_buf,
1199                         "--delete does not work without -r or -d.\n");
1200                 return 0;
1201         }
1202
1203         if (delete_mode && refused_delete) {
1204                 create_refuse_error(refused_delete);
1205                 return 0;
1206         }
1207
1208         if (remove_sender_files) {
1209                 /* We only want to infer this refusal of --remove-sender-files
1210                  * via the refusal of "delete", not any of the "delete-FOO"
1211                  * options. */
1212                 if (refused_delete && am_sender) {
1213                         create_refuse_error(refused_delete);
1214                         return 0;
1215                 }
1216                 need_messages_from_generator = 1;
1217         }
1218
1219         *argv = poptGetArgs(pc);
1220         *argc = count_args(*argv);
1221
1222         if (sanitize_paths) {
1223                 int i;
1224                 for (i = *argc; i-- > 0; )
1225                         (*argv)[i] = sanitize_path(NULL, (*argv)[i], "", 0, NULL);
1226                 if (tmpdir) {
1227                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, NULL);
1228                         die_on_unsafe_path(tmpdir, 0);
1229                 }
1230                 if (backup_dir) {
1231                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, NULL);
1232                         die_on_unsafe_path(backup_dir, 0);
1233                 }
1234         }
1235         if (server_filter_list.head && !am_sender) {
1236                 struct filter_list_struct *elp = &server_filter_list;
1237                 if (tmpdir) {
1238                         if (!*tmpdir)
1239                                 goto options_rejected;
1240                         clean_fname(tmpdir, 1);
1241                         if (check_filter(elp, tmpdir, 1) < 0)
1242                                 goto options_rejected;
1243                 }
1244                 if (backup_dir) {
1245                         if (!*backup_dir)
1246                                 goto options_rejected;
1247                         clean_fname(backup_dir, 1);
1248                         if (check_filter(elp, backup_dir, 1) < 0) {
1249                             options_rejected:
1250                                 snprintf(err_buf, sizeof err_buf,
1251                                     "Your options have been rejected by the server.\n");
1252                                 return 0;
1253                         }
1254                 }
1255         }
1256
1257         if (!backup_suffix)
1258                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
1259         backup_suffix_len = strlen(backup_suffix);
1260         if (strchr(backup_suffix, '/') != NULL) {
1261                 snprintf(err_buf, sizeof err_buf,
1262                         "--suffix cannot contain slashes: %s\n",
1263                         backup_suffix);
1264                 return 0;
1265         }
1266         if (backup_dir) {
1267                 backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
1268                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
1269                 if (backup_dir_remainder < 32) {
1270                         snprintf(err_buf, sizeof err_buf,
1271                                 "the --backup-dir path is WAY too long.\n");
1272                         return 0;
1273                 }
1274                 if (backup_dir_buf[backup_dir_len - 1] != '/') {
1275                         backup_dir_buf[backup_dir_len++] = '/';
1276                         backup_dir_buf[backup_dir_len] = '\0';
1277                 }
1278                 if (verbose > 1 && !am_sender)
1279                         rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
1280         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
1281                 snprintf(err_buf, sizeof err_buf,
1282                         "--suffix cannot be a null string without --backup-dir\n");
1283                 return 0;
1284         } else if (make_backups && delete_mode && !delete_excluded) {
1285                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
1286                         "P *%s", backup_suffix);
1287                 parse_rule(&filter_list, backup_dir_buf, 0, 0);
1288         }
1289         if (make_backups && !backup_dir)
1290                 omit_dir_times = 1;
1291
1292         if (stdout_format) {
1293                 if (am_server && log_format_has(stdout_format, 'I'))
1294                         stdout_format_has_i = 2;
1295                 else if (log_format_has(stdout_format, 'i'))
1296                         stdout_format_has_i = itemize_changes | 1;
1297                 if (!log_format_has(stdout_format, 'b')
1298                  && !log_format_has(stdout_format, 'c'))
1299                         log_before_transfer = !am_server;
1300         } else if (itemize_changes) {
1301                 stdout_format = "%i %n%L";
1302                 stdout_format_has_i = itemize_changes;
1303                 log_before_transfer = !am_server;
1304         }
1305
1306         if (do_progress && !verbose && !log_before_transfer && !am_server)
1307                 verbose = 1;
1308
1309         if (dry_run)
1310                 do_xfers = 0;
1311
1312         set_io_timeout(io_timeout);
1313
1314         if (verbose && !stdout_format) {
1315                 stdout_format = "%n%L";
1316                 log_before_transfer = !am_server;
1317         }
1318         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
1319                 stdout_format_has_o_or_i = 1;
1320
1321         if (logfile_name && !am_daemon) {
1322                 if (!logfile_format) {
1323                         logfile_format = "%i %n%L";
1324                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
1325                 } else {
1326                         if (log_format_has(logfile_format, 'i'))
1327                                 logfile_format_has_i = 1;
1328                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
1329                                 logfile_format_has_o_or_i = 1;
1330                 }
1331                 log_init(0);
1332         } else if (!am_daemon)
1333                 logfile_format = NULL;
1334
1335         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
1336                 bwlimit = daemon_bwlimit;
1337         if (bwlimit) {
1338                 bwlimit_writemax = (size_t)bwlimit * 128;
1339                 if (bwlimit_writemax < 512)
1340                         bwlimit_writemax = 512;
1341         }
1342
1343         if (sparse_files && inplace) {
1344                 /* Note: we don't check for this below, because --append is
1345                  * OK with --sparse (as long as redos are handled right). */
1346                 snprintf(err_buf, sizeof err_buf,
1347                          "--sparse cannot be used with --inplace\n");
1348                 return 0;
1349         }
1350
1351         if (append_mode) {
1352                 if (whole_file > 0) {
1353                         snprintf(err_buf, sizeof err_buf,
1354                                  "--append cannot be used with --whole-file\n");
1355                         return 0;
1356                 }
1357                 if (refused_inplace) {
1358                         create_refuse_error(refused_inplace);
1359                         return 0;
1360                 }
1361                 inplace = 1;
1362         }
1363
1364         if (delay_updates && !partial_dir)
1365                 partial_dir = tmp_partialdir;
1366
1367         if (inplace) {
1368 #ifdef HAVE_FTRUNCATE
1369                 if (partial_dir) {
1370                         snprintf(err_buf, sizeof err_buf,
1371                                  "--%s cannot be used with --%s\n",
1372                                  append_mode ? "append" : "inplace",
1373                                  delay_updates ? "delay-updates" : "partial-dir");
1374                         return 0;
1375                 }
1376                 /* --inplace implies --partial for refusal purposes, but we
1377                  * clear the keep_partial flag for internal logic purposes. */
1378                 if (refused_partial) {
1379                         create_refuse_error(refused_partial);
1380                         return 0;
1381                 }
1382                 keep_partial = 0;
1383 #else
1384                 snprintf(err_buf, sizeof err_buf,
1385                          "--%s is not supported on this %s\n",
1386                          append_mode ? "append" : "inplace",
1387                          am_server ? "server" : "client");
1388                 return 0;
1389 #endif
1390         } else {
1391                 if (keep_partial && !partial_dir && !am_server) {
1392                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
1393                                 partial_dir = strdup(arg);
1394                 }
1395                 if (partial_dir) {
1396                         if (*partial_dir)
1397                                 clean_fname(partial_dir, 1);
1398                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
1399                                 partial_dir = NULL;
1400                         else if (*partial_dir != '/') {
1401                                 parse_rule(&filter_list, partial_dir,
1402                                     MATCHFLG_NO_PREFIXES|MATCHFLG_DIRECTORY, 0);
1403                         }
1404                         if (!partial_dir && refused_partial) {
1405                                 create_refuse_error(refused_partial);
1406                                 return 0;
1407                         }
1408                         keep_partial = 1;
1409                 }
1410         }
1411
1412         if (files_from) {
1413                 char *h, *p;
1414                 int q;
1415                 if (*argc > 2 || (!am_daemon && *argc == 1)) {
1416                         usage(FERROR);
1417                         exit_cleanup(RERR_SYNTAX);
1418                 }
1419                 if (strcmp(files_from, "-") == 0) {
1420                         filesfrom_fd = 0;
1421                         if (am_server)
1422                                 filesfrom_host = ""; /* reading from socket */
1423                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
1424                         if (am_server) {
1425                                 snprintf(err_buf, sizeof err_buf,
1426                                         "The --files-from sent to the server cannot specify a host.\n");
1427                                 return 0;
1428                         }
1429                         files_from = p;
1430                         filesfrom_host = h;
1431                         if (strcmp(files_from, "-") == 0) {
1432                                 snprintf(err_buf, sizeof err_buf,
1433                                         "Invalid --files-from remote filename\n");
1434                                 return 0;
1435                         }
1436                 } else {
1437                         if (sanitize_paths)
1438                                 files_from = sanitize_path(NULL, files_from, NULL, 0, NULL);
1439                         if (server_filter_list.head) {
1440                                 if (!*files_from)
1441                                         goto options_rejected;
1442                                 clean_fname(files_from, 1);
1443                                 if (check_filter(&server_filter_list, files_from, 0) < 0)
1444                                         goto options_rejected;
1445                         }
1446                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
1447                         if (filesfrom_fd < 0) {
1448                                 snprintf(err_buf, sizeof err_buf,
1449                                         "failed to open files-from file %s: %s\n",
1450                                         files_from, strerror(errno));
1451                                 return 0;
1452                         }
1453                 }
1454         }
1455
1456         am_starting_up = 0;
1457
1458         return 1;
1459 }
1460
1461
1462 /**
1463  * Construct a filtered list of options to pass through from the
1464  * client to the server.
1465  *
1466  * This involves setting options that will tell the server how to
1467  * behave, and also filtering out options that are processed only
1468  * locally.
1469  **/
1470 void server_options(char **args,int *argc)
1471 {
1472         static char argstr[64];
1473         int ac = *argc;
1474         char *arg;
1475
1476         int i, x;
1477
1478         if (blocking_io == -1)
1479                 blocking_io = 0;
1480
1481         /* This should always remain first on the server's command-line. */
1482         args[ac++] = "--server";
1483
1484         if (daemon_over_rsh) {
1485                 args[ac++] = "--daemon";
1486                 *argc = ac;
1487                 /* if we're passing --daemon, we're done */
1488                 return;
1489         }
1490
1491         if (!am_sender)
1492                 args[ac++] = "--sender";
1493
1494         x = 1;
1495         argstr[0] = '-';
1496         for (i = 0; i < verbose; i++)
1497                 argstr[x++] = 'v';
1498
1499         /* the -q option is intentionally left out */
1500         if (make_backups)
1501                 argstr[x++] = 'b';
1502         if (update_only)
1503                 argstr[x++] = 'u';
1504         if (!do_xfers) /* Note: NOT "dry_run"! */
1505                 argstr[x++] = 'n';
1506         if (preserve_links)
1507                 argstr[x++] = 'l';
1508         if (xfer_dirs > (recurse || !delete_mode || !am_sender))
1509                 argstr[x++] = 'd';
1510         if (am_sender) {
1511                 if (keep_dirlinks)
1512                         argstr[x++] = 'K';
1513                 if (prune_empty_dirs)
1514                         argstr[x++] = 'm';
1515                 if (omit_dir_times == 2)
1516                         argstr[x++] = 'O';
1517         } else {
1518                 if (copy_links)
1519                         argstr[x++] = 'L';
1520                 if (copy_dirlinks)
1521                         argstr[x++] = 'k';
1522         }
1523
1524         if (whole_file > 0)
1525                 argstr[x++] = 'W';
1526         /* We don't need to send --no-whole-file, because it's the
1527          * default for remote transfers, and in any case old versions
1528          * of rsync will not understand it. */
1529
1530         if (preserve_hard_links)
1531                 argstr[x++] = 'H';
1532         if (preserve_uid)
1533                 argstr[x++] = 'o';
1534         if (preserve_gid)
1535                 argstr[x++] = 'g';
1536         if (preserve_devices) /* ignore preserve_specials here */
1537                 argstr[x++] = 'D';
1538         if (preserve_times)
1539                 argstr[x++] = 't';
1540         if (preserve_perms)
1541                 argstr[x++] = 'p';
1542         else if (preserve_executability && am_sender)
1543                 argstr[x++] = 'E';
1544         if (recurse)
1545                 argstr[x++] = 'r';
1546         if (always_checksum)
1547                 argstr[x++] = 'c';
1548         if (cvs_exclude)
1549                 argstr[x++] = 'C';
1550         if (ignore_times)
1551                 argstr[x++] = 'I';
1552         if (relative_paths)
1553                 argstr[x++] = 'R';
1554         if (one_file_system) {
1555                 argstr[x++] = 'x';
1556                 if (one_file_system > 1)
1557                         argstr[x++] = 'x';
1558         }
1559         if (sparse_files)
1560                 argstr[x++] = 'S';
1561         if (do_compression)
1562                 argstr[x++] = 'z';
1563
1564         /* This is a complete hack - blame Rusty.  FIXME!
1565          * This hack is only needed for older rsync versions that
1566          * don't understand the --list-only option. */
1567         if (list_only == 1 && !recurse)
1568                 argstr[x++] = 'r';
1569
1570         argstr[x] = '\0';
1571
1572         if (x != 1)
1573                 args[ac++] = argstr;
1574
1575         if (list_only > 1)
1576                 args[ac++] = "--list-only";
1577
1578         /* This makes sure that the remote rsync can handle deleting with -d
1579          * sans -r because the --no-r option was added at the same time. */
1580         if (xfer_dirs && !recurse && delete_mode && am_sender)
1581                 args[ac++] = "--no-r";
1582
1583         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
1584                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
1585                         goto oom;
1586                 args[ac++] = arg;
1587         }
1588
1589         if (preserve_devices) {
1590                 /* Note: sending "--devices" would not be backward-compatible. */
1591                 if (!preserve_specials)
1592                         args[ac++] = "--no-specials"; /* -D is already set. */
1593         } else if (preserve_specials)
1594                 args[ac++] = "--specials";
1595
1596         /* The server side doesn't use our log-format, but in certain
1597          * circumstances they need to know a little about the option. */
1598         if (stdout_format && am_sender) {
1599                 /* Use --log-format, not --out-format, for compatibility. */
1600                 if (stdout_format_has_i > 1)
1601                         args[ac++] = "--log-format=%i%I";
1602                 else if (stdout_format_has_i)
1603                         args[ac++] = "--log-format=%i";
1604                 else if (stdout_format_has_o_or_i)
1605                         args[ac++] = "--log-format=%o";
1606                 else if (!verbose)
1607                         args[ac++] = "--log-format=X";
1608         }
1609
1610         if (block_size) {
1611                 if (asprintf(&arg, "-B%lu", block_size) < 0)
1612                         goto oom;
1613                 args[ac++] = arg;
1614         }
1615
1616         if (max_delete && am_sender) {
1617                 if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
1618                         goto oom;
1619                 args[ac++] = arg;
1620         }
1621
1622         if (min_size && am_sender) {
1623                 args[ac++] = "--min-size";
1624                 args[ac++] = min_size_arg;
1625         }
1626
1627         if (max_size && am_sender) {
1628                 args[ac++] = "--max-size";
1629                 args[ac++] = max_size_arg;
1630         }
1631
1632         if (io_timeout) {
1633                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
1634                         goto oom;
1635                 args[ac++] = arg;
1636         }
1637
1638         if (bwlimit) {
1639                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
1640                         goto oom;
1641                 args[ac++] = arg;
1642         }
1643
1644         if (backup_dir) {
1645                 args[ac++] = "--backup-dir";
1646                 args[ac++] = backup_dir;
1647         }
1648
1649         /* Only send --suffix if it specifies a non-default value. */
1650         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
1651                 /* We use the following syntax to avoid weirdness with '~'. */
1652                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
1653                         goto oom;
1654                 args[ac++] = arg;
1655         }
1656
1657         if (am_sender) {
1658                 if (delete_excluded)
1659                         args[ac++] = "--delete-excluded";
1660                 else if (delete_before == 1 || delete_after)
1661                         args[ac++] = "--delete";
1662                 if (delete_before > 1)
1663                         args[ac++] = "--delete-before";
1664                 if (delete_during)
1665                         args[ac++] = "--delete-during";
1666                 if (delete_after)
1667                         args[ac++] = "--delete-after";
1668                 if (force_delete)
1669                         args[ac++] = "--force";
1670                 if (write_batch < 0)
1671                         args[ac++] = "--only-write-batch=X";
1672                 if (am_root > 1)
1673                         args[ac++] = "--super";
1674                 if (size_only)
1675                         args[ac++] = "--size-only";
1676         }
1677
1678         if (modify_window_set) {
1679                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
1680                         goto oom;
1681                 args[ac++] = arg;
1682         }
1683
1684         if (checksum_seed) {
1685                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
1686                         goto oom;
1687                 args[ac++] = arg;
1688         }
1689
1690         if (partial_dir && am_sender) {
1691                 if (partial_dir != tmp_partialdir) {
1692                         args[ac++] = "--partial-dir";
1693                         args[ac++] = partial_dir;
1694                 }
1695                 if (delay_updates)
1696                         args[ac++] = "--delay-updates";
1697         } else if (keep_partial && am_sender)
1698                 args[ac++] = "--partial";
1699
1700         if (ignore_errors)
1701                 args[ac++] = "--ignore-errors";
1702
1703         if (copy_unsafe_links)
1704                 args[ac++] = "--copy-unsafe-links";
1705
1706         if (safe_symlinks)
1707                 args[ac++] = "--safe-links";
1708
1709         if (numeric_ids)
1710                 args[ac++] = "--numeric-ids";
1711
1712         if (ignore_existing && am_sender)
1713                 args[ac++] = "--ignore-existing";
1714
1715         /* Backward compatibility: send --existing, not --ignore-non-existing. */
1716         if (ignore_non_existing && am_sender)
1717                 args[ac++] = "--existing";
1718
1719         if (append_mode)
1720                 args[ac++] = "--append";
1721         else if (inplace)
1722                 args[ac++] = "--inplace";
1723
1724         if (tmpdir && am_sender) {
1725                 args[ac++] = "--temp-dir";
1726                 args[ac++] = tmpdir;
1727         }
1728
1729         if (basis_dir[0] && am_sender) {
1730                 /* the server only needs this option if it is not the sender,
1731                  *   and it may be an older version that doesn't know this
1732                  *   option, so don't send it if client is the sender.
1733                  */
1734                 int i;
1735                 for (i = 0; i < basis_dir_cnt; i++) {
1736                         args[ac++] = dest_option;
1737                         args[ac++] = basis_dir[i];
1738                 }
1739         }
1740
1741         if (files_from && (!am_sender || filesfrom_host)) {
1742                 if (filesfrom_host) {
1743                         args[ac++] = "--files-from";
1744                         args[ac++] = files_from;
1745                         if (eol_nulls)
1746                                 args[ac++] = "--from0";
1747                 } else {
1748                         args[ac++] = "--files-from=-";
1749                         args[ac++] = "--from0";
1750                 }
1751                 if (!relative_paths)
1752                         args[ac++] = "--no-relative";
1753         }
1754         if (relative_paths && !implied_dirs && !am_sender)
1755                 args[ac++] = "--no-implied-dirs";
1756
1757         if (fuzzy_basis && am_sender)
1758                 args[ac++] = "--fuzzy";
1759
1760         if (remove_sender_files == 1)
1761                 args[ac++] = "--remove-sender-files";
1762         else if (remove_sender_files)
1763                 args[ac++] = "--remove-sent-files";
1764
1765         *argc = ac;
1766         return;
1767
1768     oom:
1769         out_of_memory("server_options");
1770 }
1771
1772 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
1773  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
1774  * memory with the HOST.  If a daemon-accessing spec was specified, the value
1775  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
1776  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
1777  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
1778  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
1779 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
1780 {
1781         char *p;
1782         int not_host;
1783
1784         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
1785                 char *path;
1786                 int hostlen;
1787                 s += strlen(URL_PREFIX);
1788                 if ((p = strchr(s, '/')) != NULL) {
1789                         hostlen = p - s;
1790                         path = p + 1;
1791                 } else {
1792                         hostlen = strlen(s);
1793                         path = "";
1794                 }
1795                 if (*s == '[' && (p = strchr(s, ']')) != NULL) {
1796                         s++;
1797                         hostlen = p - s;
1798                         if (p[1] == ':')
1799                                 *port_ptr = atoi(p+2);
1800                 } else {
1801                         if ((p = strchr(s, ':')) != NULL) {
1802                                 hostlen = p - s;
1803                                 *port_ptr = atoi(p+1);
1804                         }
1805                 }
1806                 if (!*port_ptr)
1807                         *port_ptr = RSYNC_PORT;
1808                 *host_ptr = new_array(char, hostlen + 1);
1809                 strlcpy(*host_ptr, s, hostlen + 1);
1810                 return path;
1811         }
1812
1813         if (*s == '[' && (p = strchr(s, ']')) != NULL && p[1] == ':') {
1814                 s++;
1815                 *p = '\0';
1816                 not_host = strchr(s, '/') || !strchr(s, ':');
1817                 *p = ']';
1818                 if (not_host)
1819                         return NULL;
1820                 p++;
1821         } else {
1822                 if (!(p = strchr(s, ':')))
1823                         return NULL;
1824                 *p = '\0';
1825                 not_host = strchr(s, '/') != NULL;
1826                 *p = ':';
1827                 if (not_host)
1828                         return NULL;
1829         }
1830
1831         *host_ptr = new_array(char, p - s + 1);
1832         strlcpy(*host_ptr, s, p - s + 1);
1833
1834         if (p[1] == ':') {
1835                 if (port_ptr && !*port_ptr)
1836                         *port_ptr = RSYNC_PORT;
1837                 return p + 2;
1838         }
1839         if (port_ptr)
1840                 *port_ptr = 0;
1841
1842         return p + 1;
1843 }