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 *log_format = NULL;
 151 char *logfile_name = NULL;
 152 char *logfile_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 log_format_has_i = 0;
 169 int logfile_format_has_i = 0;
 170 int log_format_has_o_or_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,"     --log-file=FILE         output what we're doing to a log file\n");
 369   rprintf(F,"     --log-format=FORMAT     output filenames using the specified format\n");
 370   rprintf(F,"     --password-file=FILE    read password from FILE\n");
 371   rprintf(F,"     --list-only             list the files instead of copying them\n");
 372   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 373   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 374   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 375   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 376   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 377 #ifdef INET6
 378   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 379   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 380 #endif
 381   rprintf(F,"     --version               print version number\n");
 382   rprintf(F,"(-h) --help                  show this help (-h works with no other options)\n");
 383
 384   rprintf(F,"\nUse \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 385   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 386   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 387 }
 388
 389 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 390       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 391       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 392       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 393       OPT_NO_D,
 394       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 395
 396 static struct poptOption long_options[] = {
 397   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 398   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 399   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 400   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 401   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 402   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 403   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 404   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 405   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 406   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 407   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 408   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 409   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 410   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 411   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 412   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 413   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 414   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 415   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 416   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 417   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 418   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 419   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 420   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 421   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 2, 0, 0 },
 422   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 423   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 424   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 425   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 426   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 427   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 428   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 429   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 430   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 431   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 432   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 433   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 434   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 435   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 436   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 437   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 438   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 439   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 440   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 441   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 442   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 443   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 444   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 445   {"hard-links",      'H', POPT_ARG_VAL,    &preserve_hard_links, 1, 0, 0 },
 446   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 447   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 448   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 449   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 450   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 451   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 452   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 453   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 454   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 455   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 456   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 457   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 458   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 459   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 460   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 461   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 462   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 463   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files, 0, 0, 0 },
 464   {"inplace",          0,  POPT_ARG_NONE,   &inplace, 0, 0, 0 },
 465   {"append",           0,  POPT_ARG_VAL,    &append_mode, 1, 0, 0 },
 466   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 467   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 468   {"delete-before",    0,  POPT_ARG_VAL,    &delete_before, 2, 0, 0 },
 469   {"delete-during",    0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 470   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 471   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 472   {"remove-sent-files",0,  POPT_ARG_NONE,   &remove_sent_files, 0, 0, 0 },
 473   {"force",            0,  POPT_ARG_NONE,   &force_delete, 0, 0, 0 },
 474   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors, 0, 0, 0 },
 475   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 476   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 477   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 478   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 479   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 480   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 481   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 482   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 483   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 484   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 485   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 486   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum, 0, 0, 0 },
 487   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 488   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 489   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 490   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 491   {"fuzzy",           'y', POPT_ARG_NONE,   &fuzzy_basis, 0, 0, 0 },
 492   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 493   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
 494   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 495   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 496   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 497   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 498   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 499   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 500   {"delay-updates",    0,  POPT_ARG_NONE,   &delay_updates, 0, 0, 0 },
 501   {"prune-empty-dirs",'m', POPT_ARG_NONE,   &prune_empty_dirs, 0, 0, 0 },
 502   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 503   {"log-format",       0,  POPT_ARG_STRING, &log_format, 0, 0, 0 },
 504   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 505   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
 506   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
 507   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 508   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 509   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 510   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 511   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 512   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 513   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 514   {"from0",           '0', POPT_ARG_NONE,   &eol_nulls, 0, 0, 0},
 515   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids, 0, 0, 0 },
 516   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
 517   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 518   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 519   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 520 #ifdef INET6
 521   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 522   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 523 #endif
 524   {"8-bit-output",    '8', POPT_ARG_NONE,   &allow_8bit_chars, 0, 0, 0 },
 525   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 526   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 527   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
 528   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
 529   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
 530   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
 531   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 532   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
 533   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
 534   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
 535   /* All the following options switch us into daemon-mode option-parsing. */
 536   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
 537   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 538   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 539   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 540   {0,0,0,0, 0, 0, 0}
 541 };
 542
 543 static void daemon_usage(enum logcode F)
 544 {
 545   print_rsync_version(F);
 546
 547   rprintf(F,"\nUsage: rsync --daemon [OPTION]...\n");
 548   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
 549   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 550   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 551   rprintf(F,"     --no-detach             do not detach from the parent\n");
 552   rprintf(F,"     --port=PORT             listen on alternate port number\n");
 553   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
 554   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 555   rprintf(F," -v, --verbose               increase verbosity\n");
 556 #ifdef INET6
 557   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 558   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 559 #endif
 560   rprintf(F,"     --help                  show this help screen\n");
 561
 562   rprintf(F,"\nIf you were not trying to invoke rsync as a daemon, avoid using any of the\n");
 563   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
 564 }
 565
 566 static struct poptOption long_daemon_options[] = {
 567   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 568   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 569   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
 570   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
 571   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
 572 #ifdef INET6
 573   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 574   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 575 #endif
 576   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
 577   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 578   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
 579   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 580   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
 581   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 582   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
 583   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 584   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 585   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 586   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 587   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
 588   {0,0,0,0, 0, 0, 0}
 589 };
 590
 591
 592 static char err_buf[200];
 593
 594
 595 /**
 596  * Store the option error message, if any, so that we can log the
 597  * connection attempt (which requires parsing the options), and then
 598  * show the error later on.
 599  **/
 600 void option_error(void)
 601 {
 602         if (!err_buf[0]) {
 603                 strcpy(err_buf, "Error parsing options: "
 604                     "option may be supported on client but not on server?\n");
 605         }
 606
 607         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
 608         msleep(20);
 609 }
 610
 611
 612 /**
 613  * Tweak the option table to disable all options that the rsyncd.conf
 614  * file has told us to refuse.
 615  **/
 616 static void set_refuse_options(char *bp)
 617 {
 618         struct poptOption *op;
 619         char *cp, shortname[2];
 620         int is_wild, found_match;
 621
 622         shortname[1] = '\0';
 623
 624         while (1) {
 625                 while (*bp == ' ') bp++;
 626                 if (!*bp)
 627                         break;
 628                 if ((cp = strchr(bp, ' ')) != NULL)
 629                         *cp= '\0';
 630                 is_wild = strpbrk(bp, "*?[") != NULL;
 631                 found_match = 0;
 632                 for (op = long_options; ; op++) {
 633                         *shortname = op->shortName;
 634                         if (!op->longName && !*shortname)
 635                                 break;
 636                         if ((op->longName && wildmatch(bp, op->longName))
 637                             || (*shortname && wildmatch(bp, shortname))) {
 638                                 if (op->argInfo == POPT_ARG_VAL)
 639                                         op->argInfo = POPT_ARG_NONE;
 640                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
 641                                 found_match = 1;
 642                                 /* These flags are set to let us easily check
 643                                  * an implied option later in the code. */
 644                                 switch (*shortname) {
 645                                 case 'r': case 'd': case 'l': case 'p':
 646                                 case 't': case 'g': case 'o': case 'D':
 647                                         refused_archive_part = op->val;
 648                                         break;
 649                                 case 'z':
 650                                         refused_compress = op->val;
 651                                         break;
 652                                 case '\0':
 653                                         if (wildmatch("delete", op->longName))
 654                                                 refused_delete = op->val;
 655                                         else if (wildmatch("delete-before", op->longName))
 656                                                 refused_delete_before = op->val;
 657                                         else if (wildmatch("partial", op->longName))
 658                                                 refused_partial = op->val;
 659                                         else if (wildmatch("progress", op->longName))
 660                                                 refused_progress = op->val;
 661                                         else if (wildmatch("inplace", op->longName))
 662                                                 refused_inplace = op->val;
 663                                         break;
 664                                 }
 665                                 if (!is_wild)
 666                                         break;
 667                         }
 668                 }
 669                 if (!found_match) {
 670                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
 671                                 bp);
 672                 }
 673                 if (!cp)
 674                         break;
 675                 *cp = ' ';
 676                 bp = cp + 1;
 677         }
 678
 679         for (op = long_options; ; op++) {
 680                 *shortname = op->shortName;
 681                 if (!op->longName && !*shortname)
 682                         break;
 683                 if (op->val == OPT_DAEMON) {
 684                         if (op->argInfo == POPT_ARG_VAL)
 685                                 op->argInfo = POPT_ARG_NONE;
 686                         op->val = (op - long_options) + OPT_REFUSED_BASE;
 687                 }
 688         }
 689 }
 690
 691
 692 static int count_args(const char **argv)
 693 {
 694         int i = 0;
 695
 696         if (argv) {
 697                 while (argv[i] != NULL)
 698                         i++;
 699         }
 700
 701         return i;
 702 }
 703
 704
 705 static OFF_T parse_size_arg(char **size_arg, char def_suf)
 706 {
 707         int reps, mult, make_compatible = 0;
 708         const char *arg;
 709         OFF_T size = 1;
 710
 711         for (arg = *size_arg; isdigit(*(uchar*)arg); arg++) {}
 712         if (*arg == '.')
 713                 for (arg++; isdigit(*(uchar*)arg); arg++) {}
 714         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
 715         case 'b': case 'B':
 716                 reps = 0;
 717                 break;
 718         case 'k': case 'K':
 719                 reps = 1;
 720                 break;
 721         case 'm': case 'M':
 722                 reps = 2;
 723                 break;
 724         case 'g': case 'G':
 725                 reps = 3;
 726                 break;
 727         default:
 728                 return -1;
 729         }
 730         if (*arg == 'b' || *arg == 'B')
 731                 mult = 1000, make_compatible = 1, arg++;
 732         else if (!*arg || *arg == '+' || *arg == '-')
 733                 mult = 1024;
 734         else if (strncasecmp(arg, "ib", 2) == 0)
 735                 mult = 1024, arg += 2;
 736         else
 737                 return -1;
 738         while (reps--)
 739                 size *= mult;
 740         size *= atof(*size_arg);
 741         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
 742                 size += atoi(arg), make_compatible = 1, arg += 2;
 743         if (*arg)
 744                 return -1;
 745         if (size > 0 && make_compatible) {
 746                 /* We convert this manually because we may need %lld precision,
 747                  * and that's not a portable sprintf() escape. */
 748                 char buf[128], *s = buf + sizeof buf - 1;
 749                 OFF_T num = size;
 750                 *s = '\0';
 751                 while (num) {
 752                         *--s = (num % 10) + '0';
 753                         num /= 10;
 754                 }
 755                 if (!(*size_arg = strdup(s)))
 756                         out_of_memory("parse_size_arg");
 757         }
 758         return size;
 759 }
 760
 761
 762 static void create_refuse_error(int which)
 763 {
 764         /* The "which" value is the index + OPT_REFUSED_BASE. */
 765         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
 766         int n = snprintf(err_buf, sizeof err_buf,
 767                          "The server is configured to refuse --%s\n",
 768                          op->longName) - 1;
 769         if (op->shortName) {
 770                 snprintf(err_buf + n, sizeof err_buf - n,
 771                          " (-%c)\n", op->shortName);
 772         }
 773 }
 774
 775
 776 /**
 777  * Process command line arguments.  Called on both local and remote.
 778  *
 779  * @retval 1 if all options are OK; with globals set to appropriate
 780  * values
 781  *
 782  * @retval 0 on error, with err_buf containing an explanation
 783  **/
 784 int parse_arguments(int *argc, const char ***argv, int frommain)
 785 {
 786         int opt;
 787         char *ref = lp_refuse_options(module_id);
 788         const char *arg;
 789         poptContext pc;
 790
 791         if (ref && *ref)
 792                 set_refuse_options(ref);
 793
 794         /* TODO: Call poptReadDefaultConfig; handle errors. */
 795
 796         /* The context leaks in case of an error, but if there's a
 797          * problem we always exit anyhow. */
 798         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
 799         poptReadDefaultConfig(pc, 0);
 800
 801         while ((opt = poptGetNextOpt(pc)) != -1) {
 802                 /* most options are handled automatically by popt;
 803                  * only special cases are returned and listed here. */
 804
 805                 switch (opt) {
 806                 case OPT_VERSION:
 807                         print_rsync_version(FINFO);
 808                         exit_cleanup(0);
 809
 810                 case OPT_SERVER:
 811                         if (!am_server) {
 812                                 /* Disable popt aliases on the server side and
 813                                  * then start parsing the options again. */
 814                                 poptFreeContext(pc);
 815                                 pc = poptGetContext(RSYNC_NAME, *argc, *argv,
 816                                                     long_options, 0);
 817                                 am_server = 1;
 818                         }
 819                         break;
 820
 821                 case OPT_SENDER:
 822                         if (!am_server) {
 823                                 usage(FERROR);
 824                                 exit_cleanup(RERR_SYNTAX);
 825                         }
 826                         am_sender = 1;
 827                         break;
 828
 829                 case OPT_DAEMON:
 830                         if (am_daemon) {
 831                                 strcpy(err_buf, "Attempt to hack rsync thwarted!\n");
 832                                 return 0;
 833                         }
 834                         poptFreeContext(pc);
 835                         pc = poptGetContext(RSYNC_NAME, *argc, *argv,
 836                                             long_daemon_options, 0);
 837                         while ((opt = poptGetNextOpt(pc)) != -1) {
 838                                 switch (opt) {
 839                                 case 'h':
 840                                         daemon_usage(FINFO);
 841                                         exit_cleanup(0);
 842
 843                                 case 'v':
 844                                         verbose++;
 845                                         break;
 846
 847                                 default:
 848                                         rprintf(FERROR,
 849                                             "rsync: %s: %s (in daemon mode)\n",
 850                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 851                                             poptStrerror(opt));
 852                                         goto daemon_error;
 853                                 }
 854                         }
 855
 856                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
 857                                 snprintf(err_buf, sizeof err_buf,
 858                                          "the --temp-dir path is WAY too long.\n");
 859                                 return 0;
 860                         }
 861
 862                         if (!daemon_opt) {
 863                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
 864                             daemon_error:
 865                                 rprintf(FERROR,
 866                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
 867                                 exit_cleanup(RERR_SYNTAX);
 868                         }
 869
 870                         *argv = poptGetArgs(pc);
 871                         *argc = count_args(*argv);
 872                         am_starting_up = 0;
 873                         daemon_opt = 0;
 874                         am_daemon = 1;
 875                         return 1;
 876
 877                 case OPT_MODIFY_WINDOW:
 878                         /* The value has already been set by popt, but
 879                          * we need to remember that we're using a
 880                          * non-default setting. */
 881                         modify_window_set = 1;
 882                         break;
 883
 884                 case OPT_FILTER:
 885                         parse_rule(&filter_list, poptGetOptArg(pc), 0, 0);
 886                         break;
 887
 888                 case OPT_EXCLUDE:
 889                         parse_rule(&filter_list, poptGetOptArg(pc),
 890                                    0, XFLG_OLD_PREFIXES);
 891                         break;
 892
 893                 case OPT_INCLUDE:
 894                         parse_rule(&filter_list, poptGetOptArg(pc),
 895                                    MATCHFLG_INCLUDE, XFLG_OLD_PREFIXES);
 896                         break;
 897
 898                 case OPT_EXCLUDE_FROM:
 899                 case OPT_INCLUDE_FROM:
 900                         arg = poptGetOptArg(pc);
 901                         if (sanitize_paths) {
 902                                 arg = sanitize_path(NULL, arg, NULL, 0, NULL);
 903                                 die_on_unsafe_path((char*)arg, 0);
 904                         }
 905                         if (server_filter_list.head) {
 906                                 char *cp = strdup(arg);
 907                                 if (!cp)
 908                                         out_of_memory("parse_arguments");
 909                                 if (!*cp)
 910                                         goto options_rejected;
 911                                 clean_fname(cp, 1);
 912                                 if (check_filter(&server_filter_list, cp, 0) < 0)
 913                                         goto options_rejected;
 914                                 free(cp);
 915                         }
 916                         parse_filter_file(&filter_list, arg,
 917                                 opt == OPT_INCLUDE_FROM ? MATCHFLG_INCLUDE : 0,
 918                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
 919                         break;
 920
 921                 case 'a':
 922                         if (refused_archive_part) {
 923                                 create_refuse_error(refused_archive_part);
 924                                 return 0;
 925                         }
 926                         if (!recurse) /* preserve recurse == 2 */
 927                                 recurse = 1;
 928 #ifdef SUPPORT_LINKS
 929                         preserve_links = 1;
 930 #endif
 931                         preserve_perms = 1;
 932                         preserve_times = 1;
 933                         preserve_gid = 1;
 934                         preserve_uid = 1;
 935                         preserve_devices = 1;
 936                         preserve_specials = 1;
 937                         break;
 938
 939                 case 'D':
 940                         preserve_devices = preserve_specials = 1;
 941                         break;
 942
 943                 case OPT_NO_D:
 944                         preserve_devices = preserve_specials = 0;
 945                         break;
 946
 947                 case 'h':
 948                         human_readable++;
 949                         break;
 950
 951                 case 'i':
 952                         itemize_changes++;
 953                         break;
 954
 955                 case 'v':
 956                         verbose++;
 957                         break;
 958
 959                 case 'q':
 960                         if (frommain)
 961                                 quiet++;
 962                         break;
 963
 964                 case 'x':
 965                         one_file_system++;
 966                         break;
 967
 968                 case 'F':
 969                         switch (++F_option_cnt) {
 970                         case 1:
 971                                 parse_rule(&filter_list,": /.rsync-filter",0,0);
 972                                 break;
 973                         case 2:
 974                                 parse_rule(&filter_list,"- .rsync-filter",0,0);
 975                                 break;
 976                         }
 977                         break;
 978
 979                 case 'P':
 980                         if (refused_partial || refused_progress) {
 981                                 create_refuse_error(refused_partial
 982                                     ? refused_partial : refused_progress);
 983                                 return 0;
 984                         }
 985                         do_progress = 1;
 986                         keep_partial = 1;
 987                         break;
 988
 989                 case 'z':
 990                         if (def_compress_level < Z_DEFAULT_COMPRESSION
 991                          || def_compress_level > Z_BEST_COMPRESSION) {
 992                                 snprintf(err_buf, sizeof err_buf,
 993                                         "--compress-level value is invalid: %d\n",
 994                                         def_compress_level);
 995                                 return 0;
 996                         }
 997                         do_compression = def_compress_level != Z_NO_COMPRESSION;
 998                         if (do_compression && refused_compress) {
 999                                 create_refuse_error(refused_compress);
1000                                 return 0;
1001                         }
1002                         break;
1003
1004                 case OPT_WRITE_BATCH:
1005                         /* batch_name is already set */
1006                         write_batch = 1;
1007                         break;
1008
1009                 case OPT_ONLY_WRITE_BATCH:
1010                         /* batch_name is already set */
1011                         write_batch = -1;
1012                         break;
1013
1014                 case OPT_READ_BATCH:
1015                         /* batch_name is already set */
1016                         read_batch = 1;
1017                         break;
1018
1019                 case OPT_MAX_SIZE:
1020                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
1021                                 snprintf(err_buf, sizeof err_buf,
1022                                         "--max-size value is invalid: %s\n",
1023                                         max_size_arg);
1024                                 return 0;
1025                         }
1026                         break;
1027
1028                 case OPT_MIN_SIZE:
1029                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
1030                                 snprintf(err_buf, sizeof err_buf,
1031                                         "--min-size value is invalid: %s\n",
1032                                         min_size_arg);
1033                                 return 0;
1034                         }
1035                         break;
1036
1037                 case OPT_LINK_DEST:
1038 #ifdef SUPPORT_HARD_LINKS
1039                         link_dest = 1;
1040                         dest_option = "--link-dest";
1041                         goto set_dest_dir;
1042 #else
1043                         snprintf(err_buf, sizeof err_buf,
1044                                  "hard links are not supported on this %s\n",
1045                                  am_server ? "server" : "client");
1046                         return 0;
1047 #endif
1048
1049                 case OPT_COPY_DEST:
1050                         copy_dest = 1;
1051                         dest_option = "--copy-dest";
1052                         goto set_dest_dir;
1053
1054                 case OPT_COMPARE_DEST:
1055                         compare_dest = 1;
1056                         dest_option = "--compare-dest";
1057                 set_dest_dir:
1058                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1059                                 snprintf(err_buf, sizeof err_buf,
1060                                         "ERROR: at most %d %s args may be specified\n",
1061                                         MAX_BASIS_DIRS, dest_option);
1062                                 return 0;
1063                         }
1064                         /* We defer sanitizing this arg until we know what
1065                          * our destination directory is going to be. */
1066                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1067                         break;
1068
1069                 case OPT_CHMOD:
1070                         arg = poptGetOptArg(pc);
1071                         if (!parse_chmod(arg, &chmod_modes)) {
1072                                 snprintf(err_buf, sizeof err_buf,
1073                                     "Invalid argument passed to --chmod (%s)\n",
1074                                     arg);
1075                                 return 0;
1076                         }
1077                         break;
1078
1079                 case OPT_HELP:
1080                         usage(FINFO);
1081                         exit_cleanup(0);
1082
1083                 default:
1084                         /* A large opt value means that set_refuse_options()
1085                          * turned this option off. */
1086                         if (opt >= OPT_REFUSED_BASE) {
1087                                 create_refuse_error(opt);
1088                                 return 0;
1089                         }
1090                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1091                                  am_server ? "on remote machine: " : "",
1092                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1093                                  poptStrerror(opt));
1094                         return 0;
1095                 }
1096         }
1097
1098         if (human_readable && *argc == 2) {
1099                 /* Allow the old meaning of 'h' (--help) on its own. */
1100                 usage(FINFO);
1101                 exit_cleanup(0);
1102         }
1103
1104 #ifndef SUPPORT_LINKS
1105         if (preserve_links && !am_sender) {
1106                 snprintf(err_buf, sizeof err_buf,
1107                          "symlinks are not supported on this %s\n",
1108                          am_server ? "server" : "client");
1109                 return 0;
1110         }
1111 #endif
1112
1113 #ifndef SUPPORT_HARD_LINKS
1114         if (preserve_hard_links) {
1115                 snprintf(err_buf, sizeof err_buf,
1116                          "hard links are not supported on this %s\n",
1117                          am_server ? "server" : "client");
1118                 return 0;
1119         }
1120 #endif
1121
1122         if (write_batch && read_batch) {
1123                 snprintf(err_buf, sizeof err_buf,
1124                         "--write-batch and --read-batch can not be used together\n");
1125                 return 0;
1126         }
1127         if (write_batch > 0 || read_batch) {
1128                 if (am_server) {
1129                         rprintf(FINFO,
1130                                 "ignoring --%s-batch option sent to server\n",
1131                                 write_batch ? "write" : "read");
1132                         /* We don't actually exit_cleanup(), so that we can
1133                          * still service older version clients that still send
1134                          * batch args to server. */
1135                         read_batch = write_batch = 0;
1136                         batch_name = NULL;
1137                 } else if (dry_run)
1138                         write_batch = 0;
1139         }
1140         if (read_batch && files_from) {
1141                 snprintf(err_buf, sizeof err_buf,
1142                         "--read-batch cannot be used with --files-from\n");
1143                 return 0;
1144         }
1145         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1146                 snprintf(err_buf, sizeof err_buf,
1147                         "the batch-file name must be %d characters or less.\n",
1148                         MAX_BATCH_NAME_LEN);
1149                 return 0;
1150         }
1151
1152         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1153                 snprintf(err_buf, sizeof err_buf,
1154                          "the --temp-dir path is WAY too long.\n");
1155                 return 0;
1156         }
1157
1158         if (compare_dest + copy_dest + link_dest > 1) {
1159                 snprintf(err_buf, sizeof err_buf,
1160                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1161                 return 0;
1162         }
1163
1164         if (files_from) {
1165                 if (recurse == 1) /* preserve recurse == 2 */
1166                         recurse = 0;
1167                 if (xfer_dirs < 0)
1168                         xfer_dirs = 1;
1169         }
1170
1171         if (xfer_dirs < 1)
1172                 xfer_dirs = recurse || list_only;
1173
1174         if (relative_paths < 0)
1175                 relative_paths = files_from? 1 : 0;
1176         if (!relative_paths)
1177                 implied_dirs = 0;
1178
1179         if (!!delete_before + delete_during + delete_after > 1) {
1180                 snprintf(err_buf, sizeof err_buf,
1181                         "You may not combine multiple --delete-WHEN options.\n");
1182                 return 0;
1183         }
1184         if (delete_before || delete_during || delete_after)
1185                 delete_mode = 1;
1186         else if (delete_mode || delete_excluded) {
1187                 if (refused_delete_before) {
1188                         create_refuse_error(refused_delete_before);
1189                         return 0;
1190                 }
1191                 delete_mode = delete_before = 1;
1192         }
1193         if (!xfer_dirs && delete_mode) {
1194                 snprintf(err_buf, sizeof err_buf,
1195                         "--delete does not work without -r or -d.\n");
1196                 return 0;
1197         }
1198
1199         if (delete_mode && refused_delete) {
1200                 create_refuse_error(refused_delete);
1201                 return 0;
1202         }
1203
1204         if (remove_sent_files) {
1205                 /* We only want to infer this refusal of --remove-sent-files
1206                  * via the refusal of "delete", not any of the "delete-FOO"
1207                  * options. */
1208                 if (refused_delete && am_sender) {
1209                         create_refuse_error(refused_delete);
1210                         return 0;
1211                 }
1212                 need_messages_from_generator = 1;
1213         }
1214
1215         *argv = poptGetArgs(pc);
1216         *argc = count_args(*argv);
1217
1218         if (sanitize_paths) {
1219                 int i;
1220                 for (i = *argc; i-- > 0; )
1221                         (*argv)[i] = sanitize_path(NULL, (*argv)[i], "", 0, NULL);
1222                 if (tmpdir) {
1223                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, NULL);
1224                         die_on_unsafe_path(tmpdir, 0);
1225                 }
1226                 if (backup_dir) {
1227                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, NULL);
1228                         die_on_unsafe_path(backup_dir, 0);
1229                 }
1230         }
1231         if (server_filter_list.head && !am_sender) {
1232                 struct filter_list_struct *elp = &server_filter_list;
1233                 if (tmpdir) {
1234                         if (!*tmpdir)
1235                                 goto options_rejected;
1236                         clean_fname(tmpdir, 1);
1237                         if (check_filter(elp, tmpdir, 1) < 0)
1238                                 goto options_rejected;
1239                 }
1240                 if (backup_dir) {
1241                         if (!*backup_dir)
1242                                 goto options_rejected;
1243                         clean_fname(backup_dir, 1);
1244                         if (check_filter(elp, backup_dir, 1) < 0) {
1245                             options_rejected:
1246                                 snprintf(err_buf, sizeof err_buf,
1247                                     "Your options have been rejected by the server.\n");
1248                                 return 0;
1249                         }
1250                 }
1251         }
1252
1253         if (!backup_suffix)
1254                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
1255         backup_suffix_len = strlen(backup_suffix);
1256         if (strchr(backup_suffix, '/') != NULL) {
1257                 snprintf(err_buf, sizeof err_buf,
1258                         "--suffix cannot contain slashes: %s\n",
1259                         backup_suffix);
1260                 return 0;
1261         }
1262         if (backup_dir) {
1263                 backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
1264                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
1265                 if (backup_dir_remainder < 32) {
1266                         snprintf(err_buf, sizeof err_buf,
1267                                 "the --backup-dir path is WAY too long.\n");
1268                         return 0;
1269                 }
1270                 if (backup_dir_buf[backup_dir_len - 1] != '/') {
1271                         backup_dir_buf[backup_dir_len++] = '/';
1272                         backup_dir_buf[backup_dir_len] = '\0';
1273                 }
1274                 if (verbose > 1 && !am_sender)
1275                         rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
1276         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
1277                 snprintf(err_buf, sizeof err_buf,
1278                         "--suffix cannot be a null string without --backup-dir\n");
1279                 return 0;
1280         } else if (make_backups && delete_mode && !delete_excluded) {
1281                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
1282                         "P *%s", backup_suffix);
1283                 parse_rule(&filter_list, backup_dir_buf, 0, 0);
1284         }
1285         if (make_backups && !backup_dir)
1286                 omit_dir_times = 1;
1287
1288         if (log_format) {
1289                 if (am_server && log_format_has(log_format, 'I'))
1290                         log_format_has_i = 2;
1291                 else if (log_format_has(log_format, 'i'))
1292                         log_format_has_i = itemize_changes | 1;
1293                 if (!log_format_has(log_format, 'b')
1294                  && !log_format_has(log_format, 'c'))
1295                         log_before_transfer = !am_server;
1296         } else if (itemize_changes) {
1297                 log_format = "%i %n%L";
1298                 log_format_has_i = itemize_changes;
1299                 log_before_transfer = !am_server;
1300         }
1301
1302         if (do_progress && !verbose && !log_before_transfer && !am_server)
1303                 verbose = 1;
1304
1305         if (dry_run)
1306                 do_xfers = 0;
1307
1308         set_io_timeout(io_timeout);
1309
1310         if (verbose && !log_format) {
1311                 log_format = "%n%L";
1312                 log_before_transfer = !am_server;
1313         }
1314         if (log_format_has_i || log_format_has(log_format, 'o'))
1315                 log_format_has_o_or_i = 1;
1316
1317         if (am_daemon)
1318                 logfile_name = NULL;
1319         else if (logfile_name) {
1320                 if (am_server) {
1321                         logfile_format = "%i %n%L";
1322                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
1323                 } else if (log_format) {
1324                         logfile_format = log_format;
1325                         logfile_format_has_i = log_format_has_i;
1326                         logfile_format_has_o_or_i = log_format_has_o_or_i;
1327                 }
1328                 log_before_transfer = !am_server;
1329                 log_init();
1330         }
1331
1332         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
1333                 bwlimit = daemon_bwlimit;
1334         if (bwlimit) {
1335                 bwlimit_writemax = (size_t)bwlimit * 128;
1336                 if (bwlimit_writemax < 512)
1337                         bwlimit_writemax = 512;
1338         }
1339
1340         if (sparse_files && inplace) {
1341                 /* Note: we don't check for this below, because --append is
1342                  * OK with --sparse (as long as redos are handled right). */
1343                 snprintf(err_buf, sizeof err_buf,
1344                          "--sparse cannot be used with --inplace\n");
1345                 return 0;
1346         }
1347
1348         if (append_mode) {
1349                 if (whole_file > 0) {
1350                         snprintf(err_buf, sizeof err_buf,
1351                                  "--append cannot be used with --whole-file\n");
1352                         return 0;
1353                 }
1354                 if (refused_inplace) {
1355                         create_refuse_error(refused_inplace);
1356                         return 0;
1357                 }
1358                 inplace = 1;
1359         }
1360
1361         if (delay_updates && !partial_dir)
1362                 partial_dir = tmp_partialdir;
1363
1364         if (inplace) {
1365 #ifdef HAVE_FTRUNCATE
1366                 if (partial_dir) {
1367                         snprintf(err_buf, sizeof err_buf,
1368                                  "--%s cannot be used with --%s\n",
1369                                  append_mode ? "append" : "inplace",
1370                                  delay_updates ? "delay-updates" : "partial-dir");
1371                         return 0;
1372                 }
1373                 /* --inplace implies --partial for refusal purposes, but we
1374                  * clear the keep_partial flag for internal logic purposes. */
1375                 if (refused_partial) {
1376                         create_refuse_error(refused_partial);
1377                         return 0;
1378                 }
1379                 keep_partial = 0;
1380 #else
1381                 snprintf(err_buf, sizeof err_buf,
1382                          "--%s is not supported on this %s\n",
1383                          append_mode ? "append" : "inplace",
1384                          am_server ? "server" : "client");
1385                 return 0;
1386 #endif
1387         } else {
1388                 if (keep_partial && !partial_dir && !am_server) {
1389                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
1390                                 partial_dir = strdup(arg);
1391                 }
1392                 if (partial_dir) {
1393                         if (*partial_dir)
1394                                 clean_fname(partial_dir, 1);
1395                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
1396                                 partial_dir = NULL;
1397                         else if (*partial_dir != '/') {
1398                                 parse_rule(&filter_list, partial_dir,
1399                                     MATCHFLG_NO_PREFIXES|MATCHFLG_DIRECTORY, 0);
1400                         }
1401                         if (!partial_dir && refused_partial) {
1402                                 create_refuse_error(refused_partial);
1403                                 return 0;
1404                         }
1405                         keep_partial = 1;
1406                 }
1407         }
1408
1409         if (files_from) {
1410                 char *h, *p;
1411                 int q;
1412                 if (*argc > 2 || (!am_daemon && *argc == 1)) {
1413                         usage(FERROR);
1414                         exit_cleanup(RERR_SYNTAX);
1415                 }
1416                 if (strcmp(files_from, "-") == 0) {
1417                         filesfrom_fd = 0;
1418                         if (am_server)
1419                                 filesfrom_host = ""; /* reading from socket */
1420                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
1421                         if (am_server) {
1422                                 snprintf(err_buf, sizeof err_buf,
1423                                         "The --files-from sent to the server cannot specify a host.\n");
1424                                 return 0;
1425                         }
1426                         files_from = p;
1427                         filesfrom_host = h;
1428                         if (strcmp(files_from, "-") == 0) {
1429                                 snprintf(err_buf, sizeof err_buf,
1430                                         "Invalid --files-from remote filename\n");
1431                                 return 0;
1432                         }
1433                 } else {
1434                         if (sanitize_paths)
1435                                 files_from = sanitize_path(NULL, files_from, NULL, 0, NULL);
1436                         if (server_filter_list.head) {
1437                                 if (!*files_from)
1438                                         goto options_rejected;
1439                                 clean_fname(files_from, 1);
1440                                 if (check_filter(&server_filter_list, files_from, 0) < 0)
1441                                         goto options_rejected;
1442                         }
1443                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
1444                         if (filesfrom_fd < 0) {
1445                                 snprintf(err_buf, sizeof err_buf,
1446                                         "failed to open files-from file %s: %s\n",
1447                                         files_from, strerror(errno));
1448                                 return 0;
1449                         }
1450                 }
1451         }
1452
1453         am_starting_up = 0;
1454
1455         return 1;
1456 }
1457
1458
1459 /**
1460  * Construct a filtered list of options to pass through from the
1461  * client to the server.
1462  *
1463  * This involves setting options that will tell the server how to
1464  * behave, and also filtering out options that are processed only
1465  * locally.
1466  **/
1467 void server_options(char **args,int *argc)
1468 {
1469         static char argstr[64];
1470         int ac = *argc;
1471         char *arg;
1472
1473         int i, x;
1474
1475         if (blocking_io == -1)
1476                 blocking_io = 0;
1477
1478         /* This should always remain first on the server's command-line. */
1479         args[ac++] = "--server";
1480
1481         if (daemon_over_rsh) {
1482                 args[ac++] = "--daemon";
1483                 *argc = ac;
1484                 /* if we're passing --daemon, we're done */
1485                 return;
1486         }
1487
1488         if (!am_sender)
1489                 args[ac++] = "--sender";
1490
1491         x = 1;
1492         argstr[0] = '-';
1493         for (i = 0; i < verbose; i++)
1494                 argstr[x++] = 'v';
1495
1496         /* the -q option is intentionally left out */
1497         if (make_backups)
1498                 argstr[x++] = 'b';
1499         if (update_only)
1500                 argstr[x++] = 'u';
1501         if (!do_xfers) /* Note: NOT "dry_run"! */
1502                 argstr[x++] = 'n';
1503         if (preserve_links)
1504                 argstr[x++] = 'l';
1505         if (xfer_dirs > (recurse || !delete_mode || !am_sender))
1506                 argstr[x++] = 'd';
1507         if (am_sender) {
1508                 if (keep_dirlinks)
1509                         argstr[x++] = 'K';
1510                 if (prune_empty_dirs)
1511                         argstr[x++] = 'm';
1512                 if (omit_dir_times == 2)
1513                         argstr[x++] = 'O';
1514         } else {
1515                 if (copy_links)
1516                         argstr[x++] = 'L';
1517                 if (copy_dirlinks)
1518                         argstr[x++] = 'k';
1519         }
1520
1521         if (whole_file > 0)
1522                 argstr[x++] = 'W';
1523         /* We don't need to send --no-whole-file, because it's the
1524          * default for remote transfers, and in any case old versions
1525          * of rsync will not understand it. */
1526
1527         if (preserve_hard_links)
1528                 argstr[x++] = 'H';
1529         if (preserve_uid)
1530                 argstr[x++] = 'o';
1531         if (preserve_gid)
1532                 argstr[x++] = 'g';
1533         if (preserve_devices) /* ignore preserve_specials here */
1534                 argstr[x++] = 'D';
1535         if (preserve_times)
1536                 argstr[x++] = 't';
1537         if (preserve_perms)
1538                 argstr[x++] = 'p';
1539         else if (preserve_executability && am_sender)
1540                 argstr[x++] = 'E';
1541         if (recurse)
1542                 argstr[x++] = 'r';
1543         if (always_checksum)
1544                 argstr[x++] = 'c';
1545         if (cvs_exclude)
1546                 argstr[x++] = 'C';
1547         if (ignore_times)
1548                 argstr[x++] = 'I';
1549         if (relative_paths)
1550                 argstr[x++] = 'R';
1551         if (one_file_system) {
1552                 argstr[x++] = 'x';
1553                 if (one_file_system > 1)
1554                         argstr[x++] = 'x';
1555         }
1556         if (sparse_files)
1557                 argstr[x++] = 'S';
1558         if (do_compression)
1559                 argstr[x++] = 'z';
1560
1561         /* This is a complete hack - blame Rusty.  FIXME!
1562          * This hack is only needed for older rsync versions that
1563          * don't understand the --list-only option. */
1564         if (list_only == 1 && !recurse)
1565                 argstr[x++] = 'r';
1566
1567         argstr[x] = '\0';
1568
1569         if (x != 1)
1570                 args[ac++] = argstr;
1571
1572         if (list_only > 1)
1573                 args[ac++] = "--list-only";
1574
1575         /* This makes sure that the remote rsync can handle deleting with -d
1576          * sans -r because the --no-r option was added at the same time. */
1577         if (xfer_dirs && !recurse && delete_mode && am_sender)
1578                 args[ac++] = "--no-r";
1579
1580         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
1581                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
1582                         goto oom;
1583                 args[ac++] = arg;
1584         }
1585
1586         if (preserve_devices) {
1587                 /* Note: sending "--devices" would not be backward-compatible. */
1588                 if (!preserve_specials)
1589                         args[ac++] = "--no-specials"; /* -D is already set. */
1590         } else if (preserve_specials)
1591                 args[ac++] = "--specials";
1592
1593         /* The server side doesn't use our log-format, but in certain
1594          * circumstances they need to know a little about the option. */
1595         if (log_format && am_sender) {
1596                 if (log_format_has_i > 1)
1597                         args[ac++] = "--log-format=%i%I";
1598                 else if (log_format_has_i)
1599                         args[ac++] = "--log-format=%i";
1600                 else if (log_format_has_o_or_i)
1601                         args[ac++] = "--log-format=%o";
1602                 else if (!verbose)
1603                         args[ac++] = "--log-format=X";
1604         }
1605
1606         if (block_size) {
1607                 if (asprintf(&arg, "-B%lu", block_size) < 0)
1608                         goto oom;
1609                 args[ac++] = arg;
1610         }
1611
1612         if (max_delete && am_sender) {
1613                 if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
1614                         goto oom;
1615                 args[ac++] = arg;
1616         }
1617
1618         if (min_size && am_sender) {
1619                 args[ac++] = "--min-size";
1620                 args[ac++] = min_size_arg;
1621         }
1622
1623         if (max_size && am_sender) {
1624                 args[ac++] = "--max-size";
1625                 args[ac++] = max_size_arg;
1626         }
1627
1628         if (io_timeout) {
1629                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
1630                         goto oom;
1631                 args[ac++] = arg;
1632         }
1633
1634         if (bwlimit) {
1635                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
1636                         goto oom;
1637                 args[ac++] = arg;
1638         }
1639
1640         if (backup_dir) {
1641                 args[ac++] = "--backup-dir";
1642                 args[ac++] = backup_dir;
1643         }
1644
1645         /* Only send --suffix if it specifies a non-default value. */
1646         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
1647                 /* We use the following syntax to avoid weirdness with '~'. */
1648                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
1649                         goto oom;
1650                 args[ac++] = arg;
1651         }
1652
1653         if (am_sender) {
1654                 if (delete_excluded)
1655                         args[ac++] = "--delete-excluded";
1656                 else if (delete_before == 1 || delete_after)
1657                         args[ac++] = "--delete";
1658                 if (delete_before > 1)
1659                         args[ac++] = "--delete-before";
1660                 if (delete_during)
1661                         args[ac++] = "--delete-during";
1662                 if (delete_after)
1663                         args[ac++] = "--delete-after";
1664                 if (force_delete)
1665                         args[ac++] = "--force";
1666                 if (write_batch < 0)
1667                         args[ac++] = "--only-write-batch=X";
1668                 if (am_root > 1)
1669                         args[ac++] = "--super";
1670                 if (size_only)
1671                         args[ac++] = "--size-only";
1672         }
1673
1674         if (modify_window_set) {
1675                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
1676                         goto oom;
1677                 args[ac++] = arg;
1678         }
1679
1680         if (checksum_seed) {
1681                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
1682                         goto oom;
1683                 args[ac++] = arg;
1684         }
1685
1686         if (partial_dir && am_sender) {
1687                 if (partial_dir != tmp_partialdir) {
1688                         args[ac++] = "--partial-dir";
1689                         args[ac++] = partial_dir;
1690                 }
1691                 if (delay_updates)
1692                         args[ac++] = "--delay-updates";
1693         } else if (keep_partial && am_sender)
1694                 args[ac++] = "--partial";
1695
1696         if (ignore_errors)
1697                 args[ac++] = "--ignore-errors";
1698
1699         if (copy_unsafe_links)
1700                 args[ac++] = "--copy-unsafe-links";
1701
1702         if (safe_symlinks)
1703                 args[ac++] = "--safe-links";
1704
1705         if (numeric_ids)
1706                 args[ac++] = "--numeric-ids";
1707
1708         if (ignore_existing && am_sender)
1709                 args[ac++] = "--ignore-existing";
1710
1711         /* Backward compatibility: send --existing, not --ignore-non-existing. */
1712         if (ignore_non_existing && am_sender)
1713                 args[ac++] = "--existing";
1714
1715         if (append_mode)
1716                 args[ac++] = "--append";
1717         else if (inplace)
1718                 args[ac++] = "--inplace";
1719
1720         if (tmpdir && am_sender) {
1721                 args[ac++] = "--temp-dir";
1722                 args[ac++] = tmpdir;
1723         }
1724
1725         if (basis_dir[0] && am_sender) {
1726                 /* the server only needs this option if it is not the sender,
1727                  *   and it may be an older version that doesn't know this
1728                  *   option, so don't send it if client is the sender.
1729                  */
1730                 int i;
1731                 for (i = 0; i < basis_dir_cnt; i++) {
1732                         args[ac++] = dest_option;
1733                         args[ac++] = basis_dir[i];
1734                 }
1735         }
1736
1737         if (files_from && (!am_sender || filesfrom_host)) {
1738                 if (filesfrom_host) {
1739                         args[ac++] = "--files-from";
1740                         args[ac++] = files_from;
1741                         if (eol_nulls)
1742                                 args[ac++] = "--from0";
1743                 } else {
1744                         args[ac++] = "--files-from=-";
1745                         args[ac++] = "--from0";
1746                 }
1747                 if (!relative_paths)
1748                         args[ac++] = "--no-relative";
1749         }
1750         if (relative_paths && !implied_dirs && !am_sender)
1751                 args[ac++] = "--no-implied-dirs";
1752
1753         if (fuzzy_basis && am_sender)
1754                 args[ac++] = "--fuzzy";
1755
1756         if (remove_sent_files)
1757                 args[ac++] = "--remove-sent-files";
1758
1759         *argc = ac;
1760         return;
1761
1762     oom:
1763         out_of_memory("server_options");
1764 }
1765
1766 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
1767  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
1768  * memory with the HOST.  If a daemon-accessing spec was specified, the value
1769  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
1770  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
1771  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
1772  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
1773 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
1774 {
1775         char *p;
1776         int not_host;
1777
1778         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
1779                 char *path;
1780                 int hostlen;
1781                 s += strlen(URL_PREFIX);
1782                 if ((p = strchr(s, '/')) != NULL) {
1783                         hostlen = p - s;
1784                         path = p + 1;
1785                 } else {
1786                         hostlen = strlen(s);
1787                         path = "";
1788                 }
1789                 if (*s == '[' && (p = strchr(s, ']')) != NULL) {
1790                         s++;
1791                         hostlen = p - s;
1792                         if (p[1] == ':')
1793                                 *port_ptr = atoi(p+2);
1794                 } else {
1795                         if ((p = strchr(s, ':')) != NULL) {
1796                                 hostlen = p - s;
1797                                 *port_ptr = atoi(p+1);
1798                         }
1799                 }
1800                 if (!*port_ptr)
1801                         *port_ptr = RSYNC_PORT;
1802                 *host_ptr = new_array(char, hostlen + 1);
1803                 strlcpy(*host_ptr, s, hostlen + 1);
1804                 return path;
1805         }
1806
1807         if (*s == '[' && (p = strchr(s, ']')) != NULL && p[1] == ':') {
1808                 s++;
1809                 *p = '\0';
1810                 not_host = strchr(s, '/') || !strchr(s, ':');
1811                 *p = ']';
1812                 if (not_host)
1813                         return NULL;
1814                 p++;
1815         } else {
1816                 if (!(p = strchr(s, ':')))
1817                         return NULL;
1818                 *p = '\0';
1819                 not_host = strchr(s, '/') != NULL;
1820                 *p = ':';
1821                 if (not_host)
1822                         return NULL;
1823         }
1824
1825         *host_ptr = new_array(char, p - s + 1);
1826         strlcpy(*host_ptr, s, p - s + 1);
1827
1828         if (p[1] == ':') {
1829                 if (port_ptr && !*port_ptr)
1830                         *port_ptr = RSYNC_PORT;
1831                 return p + 2;
1832         }
1833         if (port_ptr)
1834                 *port_ptr = 0;
1835
1836         return p + 1;
1837 }