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