options.c

   1 /*  -*- c-file-style: "linux" -*-
   2  *
   3  * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
   4  * Copyright (C) 2000, 2001, 2002 by Martin Pool <mbp@samba.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include "rsync.h"
  22 #include "popt.h"
  23 #include "zlib/zlib.h"
  24
  25 extern int module_id;
  26 extern int sanitize_paths;
  27 extern struct filter_list_struct filter_list;
  28 extern struct filter_list_struct server_filter_list;
  29
  30 int make_backups = 0;
  31
  32 /**
  33  * If 1, send the whole file as literal data rather than trying to
  34  * create an incremental diff.
  35  *
  36  * If -1, then look at whether we're local or remote and go by that.
  37  *
  38  * @sa disable_deltas_p()
  39  **/
  40 int whole_file = -1;
  41
  42 int append_mode = 0;
  43 int keep_dirlinks = 0;
  44 int copy_links = 0;
  45 int preserve_links = 0;
  46 int preserve_hard_links = 0;
  47 int preserve_perms = 0;
  48 int preserve_devices = 0;
  49 int preserve_uid = 0;
  50 int preserve_gid = 0;
  51 int preserve_times = 0;
  52 int omit_dir_times = 0;
  53 int update_only = 0;
  54 int cvs_exclude = 0;
  55 int dry_run = 0;
  56 int do_xfers = 1;
  57 int ignore_times = 0;
  58 int saw_delete_opt = 0;
  59 int saw_delete_excluded_opt = 0;
  60 int delete_mode = 0;
  61 int delete_during = 0;
  62 int delete_before = 0;
  63 int delete_after = 0;
  64 int delete_excluded = 0;
  65 int remove_sent_files = 0;
  66 int one_file_system = 0;
  67 int protocol_version = PROTOCOL_VERSION;
  68 int sparse_files = 0;
  69 int do_compression = 0;
  70 int def_compress_level = Z_DEFAULT_COMPRESSION;
  71 int am_root = 0;
  72 int am_server = 0;
  73 int am_sender = 0;
  74 int am_generator = 0;
  75 int am_starting_up = 1;
  76 int orig_umask = 0;
  77 int relative_paths = -1;
  78 int implied_dirs = 1;
  79 int numeric_ids = 0;
  80 int force_delete = 0;
  81 int io_timeout = 0;
  82 int allowed_lull = 0;
  83 char *files_from = NULL;
  84 int filesfrom_fd = -1;
  85 char *filesfrom_host = NULL;
  86 int eol_nulls = 0;
  87 int human_readable = 0;
  88 int recurse = 0;
  89 int xfer_dirs = -1;
  90 int am_daemon = 0;
  91 int daemon_over_rsh = 0;
  92 int do_stats = 0;
  93 int do_progress = 0;
  94 int keep_partial = 0;
  95 int safe_symlinks = 0;
  96 int copy_unsafe_links = 0;
  97 int size_only = 0;
  98 int daemon_bwlimit = 0;
  99 int bwlimit = 0;
 100 int fuzzy_basis = 0;
 101 size_t bwlimit_writemax = 0;
 102 int ignore_existing = 0;
 103 int ignore_non_existing = 0;
 104 int need_messages_from_generator = 0;
 105 int max_delete = 0;
 106 OFF_T max_size = 0;
 107 OFF_T min_size = 0;
 108 int ignore_errors = 0;
 109 int modify_window = 0;
 110 int blocking_io = -1;
 111 int checksum_seed = 0;
 112 int inplace = 0;
 113 int delay_updates = 0;
 114 long block_size = 0; /* "long" because popt can't set an int32. */
 115
 116
 117 /** Network address family. **/
 118 #ifdef INET6
 119 int default_af_hint = 0;        /* Any protocol */
 120 #else
 121 int default_af_hint = AF_INET;  /* Must use IPv4 */
 122 #endif
 123
 124 /** Do not go into the background when run as --daemon.  Good
 125  * for debugging and required for running as a service on W32,
 126  * or under Unix process-monitors. **/
 127 int no_detach
 128 #if defined _WIN32 || defined __WIN32__
 129         = 1;
 130 #else
 131         = 0;
 132 #endif
 133
 134 int write_batch = 0;
 135 int read_batch = 0;
 136 int backup_dir_len = 0;
 137 int backup_suffix_len;
 138 unsigned int backup_dir_remainder;
 139
 140 char *backup_suffix = NULL;
 141 char *tmpdir = NULL;
 142 char *partial_dir = NULL;
 143 char *basis_dir[MAX_BASIS_DIRS+1];
 144 char *config_file = NULL;
 145 char *shell_cmd = NULL;
 146 char *log_format = NULL;
 147 char *password_file = NULL;
 148 char *rsync_path = RSYNC_PATH;
 149 char *backup_dir = NULL;
 150 char backup_dir_buf[MAXPATHLEN];
 151 int rsync_port = 0;
 152 int compare_dest = 0;
 153 int copy_dest = 0;
 154 int link_dest = 0;
 155 int basis_dir_cnt = 0;
 156 char *dest_option = NULL;
 157
 158 int verbose = 0;
 159 int quiet = 0;
 160 int log_before_transfer = 0;
 161 int log_format_has_i = 0;
 162 int log_format_has_o_or_i = 0;
 163 int always_checksum = 0;
 164 int list_only = 0;
 165
 166 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 167 char *batch_name = NULL;
 168
 169 struct chmod_mode_struct *chmod_modes = NULL;
 170
 171 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 172 static int F_option_cnt = 0;
 173 static int modify_window_set;
 174 static int itemize_changes = 0;
 175 static int refused_delete, refused_archive_part, refused_compress;
 176 static int refused_partial, refused_progress, refused_delete_before;
 177 static int refused_inplace;
 178 static char *max_size_arg, *min_size_arg;
 179 static char partialdir_for_delayupdate[] = ".~tmp~";
 180
 181 /** Local address to bind.  As a character string because it's
 182  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 183  * address, or a hostname. **/
 184 char *bind_address;
 185
 186
 187 static void print_rsync_version(enum logcode f)
 188 {
 189         char const *got_socketpair = "no ";
 190         char const *have_inplace = "no ";
 191         char const *hardlinks = "no ";
 192         char const *links = "no ";
 193         char const *ipv6 = "no ";
 194         STRUCT_STAT *dumstat;
 195
 196 #ifdef HAVE_SOCKETPAIR
 197         got_socketpair = "";
 198 #endif
 199
 200 #ifdef HAVE_FTRUNCATE
 201         have_inplace = "";
 202 #endif
 203
 204 #ifdef SUPPORT_HARD_LINKS
 205         hardlinks = "";
 206 #endif
 207
 208 #ifdef SUPPORT_LINKS
 209         links = "";
 210 #endif
 211
 212 #ifdef INET6
 213         ipv6 = "";
 214 #endif
 215
 216         rprintf(f, "%s  version %s  protocol version %d\n",
 217                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION);
 218         rprintf(f, "Copyright (C) 1996-2006 by Wayne Davison, Andrew Tridgell, and others\n");
 219         rprintf(f, "<http://rsync.samba.org/>\n");
 220         rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, "
 221                 "%shard links, %ssymlinks, batchfiles, \n",
 222                 (int) (sizeof (OFF_T) * 8),
 223                 got_socketpair, hardlinks, links);
 224
 225         /* Note that this field may not have type ino_t.  It depends
 226          * on the complicated interaction between largefile feature
 227          * macros. */
 228         rprintf(f, "              %sinplace, %sIPv6, %d-bit system inums, %d-bit internal inums\n",
 229                 have_inplace, ipv6,
 230                 (int) (sizeof dumstat->st_ino * 8),
 231                 (int) (sizeof (int64) * 8));
 232 #ifdef MAINTAINER_MODE
 233         rprintf(f, "              panic action: \"%s\"\n",
 234                 get_panic_action());
 235 #endif
 236
 237 #if SIZEOF_INT64 < 8
 238         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 239 #endif
 240         if (sizeof (int64) != SIZEOF_INT64) {
 241                 rprintf(f,
 242                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 243                         (int) SIZEOF_INT64, (int) sizeof (int64));
 244         }
 245
 246         rprintf(f,"\nrsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 247         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 248         rprintf(f,"General Public Licence for details.\n");
 249 }
 250
 251
 252 void usage(enum logcode F)
 253 {
 254   print_rsync_version(F);
 255
 256   rprintf(F,"\nrsync is a file transfer program capable of efficient remote update\n");
 257   rprintf(F,"via a fast differencing algorithm.\n");
 258
 259   rprintf(F,"\nUsage: rsync [OPTION]... SRC [SRC]... DEST\n");
 260   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 261   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 262   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 263   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 264   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 265   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 266   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 267   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 268   rprintf(F,"\nOptions\n");
 269   rprintf(F," -v, --verbose               increase verbosity\n");
 270   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 271   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 272   rprintf(F," -a, --archive               archive mode; same as -rlptgoD (no -H)\n");
 273   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 274   rprintf(F," -r, --recursive             recurse into directories\n");
 275   rprintf(F," -R, --relative              use relative path names\n");
 276   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 277   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 278   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 279   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 280   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 281   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 282   rprintf(F,"     --append                append data onto shorter files\n");
 283   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 284   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 285   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 286   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 287   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 288   rprintf(F," -H, --hard-links            preserve hard links\n");
 289   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 290   rprintf(F," -p, --perms                 preserve permissions\n");
 291   rprintf(F," -o, --owner                 preserve owner (root only)\n");
 292   rprintf(F," -g, --group                 preserve group\n");
 293   rprintf(F," -D, --devices               preserve devices (root only)\n");
 294   rprintf(F," -t, --times                 preserve times\n");
 295   rprintf(F," -O, --omit-dir-times        omit directories when preserving times\n");
 296   rprintf(F,"     --chmod=CHMOD           change destination permissions\n");
 297   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 298   rprintf(F," -n, --dry-run               show what would have been transferred\n");
 299   rprintf(F," -W, --whole-file            copy files whole (without rsync algorithm)\n");
 300   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 301   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 302   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 303   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 304   rprintf(F,"     --existing              ignore non-existing files on receiving side\n");
 305   rprintf(F,"     --ignore-existing       ignore files that already exist on receiving side\n");
 306   rprintf(F,"     --remove-sent-files     sent files/symlinks are removed from sending side\n");
 307   rprintf(F,"     --del                   an alias for --delete-during\n");
 308   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
 309   rprintf(F,"     --delete-before         receiver deletes before transfer (default)\n");
 310   rprintf(F,"     --delete-during         receiver deletes during transfer, not before\n");
 311   rprintf(F,"     --delete-after          receiver deletes after transfer, not before\n");
 312   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
 313   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 314   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 315   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 316   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 317   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 318   rprintf(F,"     --partial               keep partially transferred files\n");
 319   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 320   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 321   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 322   rprintf(F,"     --timeout=TIME          set I/O timeout in seconds\n");
 323   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 324   rprintf(F,"     --size-only             skip files that match in size\n");
 325   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
 326   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 327   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 328   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 329   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 330   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 331   rprintf(F," -z, --compress              compress file data during the transfer\n");
 332   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 333   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 334   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 335   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 336   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 337   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 338   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 339   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 340   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 341   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 342   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 343   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 344   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 345   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 346   rprintf(F,"     --stats                 give some file-transfer stats\n");
 347   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 348   rprintf(F,"     --si                    like human-readable, but use powers of 1000\n");
 349   rprintf(F,"     --progress              show progress during transfer\n");
 350   rprintf(F," -P                          same as --partial --progress\n");
 351   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 352   rprintf(F,"     --log-format=FORMAT     output filenames using the specified format\n");
 353   rprintf(F,"     --password-file=FILE    read password from FILE\n");
 354   rprintf(F,"     --list-only             list the files instead of copying them\n");
 355   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 356   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 357   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 358   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 359   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 360 #ifdef INET6
 361   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 362   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 363 #endif
 364   rprintf(F,"     --version               print version number\n");
 365   rprintf(F,"     --help                  show this help screen\n");
 366
 367   rprintf(F,"\nUse \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 368   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 369   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 370 }
 371
 372 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 373       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 374       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 375       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 376       OPT_REFUSED_BASE = 9000};
 377
 378 static struct poptOption long_options[] = {
 379   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 380   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 381   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 382   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 383   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 384   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 385   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 386   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 387   {"human-readable",  'h', POPT_ARG_VAL,    &human_readable, 1, 0, 0},
 388   {"si",               0,  POPT_ARG_VAL,    &human_readable, 2, 0, 0},
 389   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 390   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 391   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 392   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 393   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 394   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 395   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 396   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 397   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 398   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 399   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 400   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 401   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 402   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 403   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 2, 0, 0 },
 404   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 405   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 406   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 407   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 408   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 409   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 410   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 411   {"devices",         'D', POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 412   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 413   {"no-D",             0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 414   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 415   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 416   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 417   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 418   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 419   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 420   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 421   {"hard-links",      'H', POPT_ARG_NONE,   &preserve_hard_links, 0, 0, 0 },
 422   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 423   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 424   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 425   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 426   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 427   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 428   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 429   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 430   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 431   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 432   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 433   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 434   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 435   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 436   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files, 0, 0, 0 },
 437   {"inplace",          0,  POPT_ARG_NONE,   &inplace, 0, 0, 0 },
 438   {"append",           0,  POPT_ARG_VAL,    &append_mode, 1, 0, 0 },
 439   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 440   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 441   {"delete-before",    0,  POPT_ARG_VAL,    &delete_before, 2, 0, 0 },
 442   {"delete-during",    0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 443   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 444   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 445   {"remove-sent-files",0,  POPT_ARG_NONE,   &remove_sent_files, 0, 0, 0 },
 446   {"force",            0,  POPT_ARG_NONE,   &force_delete, 0, 0, 0 },
 447   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors, 0, 0, 0 },
 448   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 449   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 450   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 451   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 452   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 453   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 454   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 455   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 456   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 457   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 458   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 459   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum, 0, 0, 0 },
 460   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 461   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 462   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 463   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 464   {"fuzzy",           'y', POPT_ARG_NONE,   &fuzzy_basis, 0, 0, 0 },
 465   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 466   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
 467   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 468   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 469   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 470   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 471   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 472   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 473   {"delay-updates",    0,  POPT_ARG_NONE,   &delay_updates, 0, 0, 0 },
 474   {"log-format",       0,  POPT_ARG_STRING, &log_format, 0, 0, 0 },
 475   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 476   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
 477   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
 478   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 479   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 480   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 481   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 482   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 483   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 484   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 485   {"from0",           '0', POPT_ARG_NONE,   &eol_nulls, 0, 0, 0},
 486   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids, 0, 0, 0 },
 487   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
 488   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 489   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 490   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 491 #ifdef INET6
 492   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 493   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 494 #endif
 495   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 496   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 497   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
 498   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
 499   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
 500   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 501   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
 502   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
 503   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
 504   /* All the following options switch us into daemon-mode option-parsing. */
 505   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
 506   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 507   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 508   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
 509   {0,0,0,0, 0, 0, 0}
 510 };
 511
 512 static void daemon_usage(enum logcode F)
 513 {
 514   print_rsync_version(F);
 515
 516   rprintf(F,"\nUsage: rsync --daemon [OPTION]...\n");
 517   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
 518   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
 519   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
 520   rprintf(F,"     --no-detach             do not detach from the parent\n");
 521   rprintf(F,"     --port=PORT             listen on alternate port number\n");
 522   rprintf(F," -v, --verbose               increase verbosity\n");
 523 #ifdef INET6
 524   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 525   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 526 #endif
 527   rprintf(F,"     --help                  show this help screen\n");
 528
 529   rprintf(F,"\nIf you were not trying to invoke rsync as a daemon, avoid using any of the\n");
 530   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
 531 }
 532
 533 static struct poptOption long_daemon_options[] = {
 534   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 535   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 536   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
 537   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
 538   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
 539 #ifdef INET6
 540   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 541   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 542 #endif
 543   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
 544   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
 545   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 546   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
 547   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
 548   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 549   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 550   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 551   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 552   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
 553   {0,0,0,0, 0, 0, 0}
 554 };
 555
 556
 557 static char err_buf[200];
 558
 559
 560 /**
 561  * Store the option error message, if any, so that we can log the
 562  * connection attempt (which requires parsing the options), and then
 563  * show the error later on.
 564  **/
 565 void option_error(void)
 566 {
 567         if (!err_buf[0]) {
 568                 strcpy(err_buf, "Error parsing options: "
 569                     "option may be supported on client but not on server?\n");
 570         }
 571
 572         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
 573 }
 574
 575
 576 /**
 577  * Tweak the option table to disable all options that the rsyncd.conf
 578  * file has told us to refuse.
 579  **/
 580 static void set_refuse_options(char *bp)
 581 {
 582         struct poptOption *op;
 583         char *cp, shortname[2];
 584         int is_wild, found_match;
 585
 586         shortname[1] = '\0';
 587
 588         while (1) {
 589                 while (*bp == ' ') bp++;
 590                 if (!*bp)
 591                         break;
 592                 if ((cp = strchr(bp, ' ')) != NULL)
 593                         *cp= '\0';
 594                 is_wild = strpbrk(bp, "*?[") != NULL;
 595                 found_match = 0;
 596                 for (op = long_options; ; op++) {
 597                         *shortname = op->shortName;
 598                         if (!op->longName && !*shortname)
 599                                 break;
 600                         if ((op->longName && wildmatch(bp, op->longName))
 601                             || (*shortname && wildmatch(bp, shortname))) {
 602                                 if (op->argInfo == POPT_ARG_VAL)
 603                                         op->argInfo = POPT_ARG_NONE;
 604                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
 605                                 found_match = 1;
 606                                 /* These flags are set to let us easily check
 607                                  * an implied option later in the code. */
 608                                 switch (*shortname) {
 609                                 case 'r': case 'd': case 'l': case 'p':
 610                                 case 't': case 'g': case 'o': case 'D':
 611                                         refused_archive_part = op->val;
 612                                         break;
 613                                 case 'z':
 614                                         refused_compress = op->val;
 615                                         break;
 616                                 case '\0':
 617                                         if (wildmatch("delete", op->longName))
 618                                                 refused_delete = op->val;
 619                                         else if (wildmatch("delete-before", op->longName))
 620                                                 refused_delete_before = op->val;
 621                                         else if (wildmatch("partial", op->longName))
 622                                                 refused_partial = op->val;
 623                                         else if (wildmatch("progress", op->longName))
 624                                                 refused_progress = op->val;
 625                                         else if (wildmatch("inplace", op->longName))
 626                                                 refused_inplace = op->val;
 627                                         break;
 628                                 }
 629                                 if (!is_wild)
 630                                         break;
 631                         }
 632                 }
 633                 if (!found_match) {
 634                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
 635                                 bp);
 636                 }
 637                 if (!cp)
 638                         break;
 639                 *cp = ' ';
 640                 bp = cp + 1;
 641         }
 642
 643         for (op = long_options; ; op++) {
 644                 *shortname = op->shortName;
 645                 if (!op->longName && !*shortname)
 646                         break;
 647                 if (op->val == OPT_DAEMON) {
 648                         if (op->argInfo == POPT_ARG_VAL)
 649                                 op->argInfo = POPT_ARG_NONE;
 650                         op->val = (op - long_options) + OPT_REFUSED_BASE;
 651                 }
 652         }
 653 }
 654
 655
 656 static int count_args(const char **argv)
 657 {
 658         int i = 0;
 659
 660         if (argv) {
 661                 while (argv[i] != NULL)
 662                         i++;
 663         }
 664
 665         return i;
 666 }
 667
 668
 669 static OFF_T parse_size_arg(char **size_arg, char def_suf)
 670 {
 671         int reps, mult, make_compatible = 0;
 672         const char *arg;
 673         OFF_T size = 1;
 674
 675         for (arg = *size_arg; isdigit(*(uchar*)arg); arg++) {}
 676         if (*arg == '.')
 677                 for (arg++; isdigit(*(uchar*)arg); arg++) {}
 678         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
 679         case 'b': case 'B':
 680                 reps = 0;
 681                 break;
 682         case 'k': case 'K':
 683                 reps = 1;
 684                 break;
 685         case 'm': case 'M':
 686                 reps = 2;
 687                 break;
 688         case 'g': case 'G':
 689                 reps = 3;
 690                 break;
 691         default:
 692                 return -1;
 693         }
 694         if (*arg == 'b' || *arg == 'B')
 695                 mult = 1000, make_compatible = 1, arg++;
 696         else if (!*arg || *arg == '+' || *arg == '-')
 697                 mult = 1024;
 698         else if (strncasecmp(arg, "ib", 2) == 0)
 699                 mult = 1024, arg += 2;
 700         else
 701                 return -1;
 702         while (reps--)
 703                 size *= mult;
 704         size *= atof(*size_arg);
 705         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
 706                 size += atoi(arg), make_compatible = 1, arg += 2;
 707         if (*arg)
 708                 return -1;
 709         if (size > 0 && make_compatible) {
 710                 /* We convert this manually because we may need %lld precision,
 711                  * and that's not a portable sprintf() escape. */
 712                 char buf[128], *s = buf + sizeof buf - 1;
 713                 OFF_T num = size;
 714                 *s = '\0';
 715                 while (num) {
 716                         *--s = (num % 10) + '0';
 717                         num /= 10;
 718                 }
 719                 if (!(*size_arg = strdup(s)))
 720                         out_of_memory("parse_size_arg");
 721         }
 722         return size;
 723 }
 724
 725
 726 static void create_refuse_error(int which)
 727 {
 728         /* The "which" value is the index + OPT_REFUSED_BASE. */
 729         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
 730         int n = snprintf(err_buf, sizeof err_buf,
 731                          "The server is configured to refuse --%s\n",
 732                          op->longName) - 1;
 733         if (op->shortName) {
 734                 snprintf(err_buf + n, sizeof err_buf - n,
 735                          " (-%c)\n", op->shortName);
 736         }
 737 }
 738
 739
 740 /**
 741  * Process command line arguments.  Called on both local and remote.
 742  *
 743  * @retval 1 if all options are OK; with globals set to appropriate
 744  * values
 745  *
 746  * @retval 0 on error, with err_buf containing an explanation
 747  **/
 748 int parse_arguments(int *argc, const char ***argv, int frommain)
 749 {
 750         int opt;
 751         char *ref = lp_refuse_options(module_id);
 752         const char *arg;
 753         poptContext pc;
 754
 755         if (ref && *ref)
 756                 set_refuse_options(ref);
 757
 758         /* TODO: Call poptReadDefaultConfig; handle errors. */
 759
 760         /* The context leaks in case of an error, but if there's a
 761          * problem we always exit anyhow. */
 762         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
 763         poptReadDefaultConfig(pc, 0);
 764
 765         while ((opt = poptGetNextOpt(pc)) != -1) {
 766                 /* most options are handled automatically by popt;
 767                  * only special cases are returned and listed here. */
 768
 769                 switch (opt) {
 770                 case OPT_VERSION:
 771                         print_rsync_version(FINFO);
 772                         exit_cleanup(0);
 773
 774                 case OPT_DAEMON:
 775                         if (am_daemon) {
 776                                 strcpy(err_buf, "Attempt to hack rsync thwarted!\n");
 777                                 return 0;
 778                         }
 779                         poptFreeContext(pc);
 780                         pc = poptGetContext(RSYNC_NAME, *argc, *argv,
 781                                             long_daemon_options, 0);
 782                         while ((opt = poptGetNextOpt(pc)) != -1) {
 783                                 switch (opt) {
 784                                 case 'h':
 785                                         daemon_usage(FINFO);
 786                                         exit_cleanup(0);
 787
 788                                 case 'v':
 789                                         verbose++;
 790                                         break;
 791
 792                                 default:
 793                                         rprintf(FERROR,
 794                                             "rsync: %s: %s (in daemon mode)\n",
 795                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 796                                             poptStrerror(opt));
 797                                         goto daemon_error;
 798                                 }
 799                         }
 800
 801                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
 802                                 snprintf(err_buf, sizeof err_buf,
 803                                          "the --temp-dir path is WAY too long.\n");
 804                                 return 0;
 805                         }
 806
 807                         if (!daemon_opt) {
 808                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
 809                             daemon_error:
 810                                 rprintf(FERROR,
 811                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
 812                                 exit_cleanup(RERR_SYNTAX);
 813                         }
 814
 815                         *argv = poptGetArgs(pc);
 816                         *argc = count_args(*argv);
 817                         am_starting_up = 0;
 818                         daemon_opt = 0;
 819                         am_daemon = 1;
 820                         return 1;
 821
 822                 case OPT_MODIFY_WINDOW:
 823                         /* The value has already been set by popt, but
 824                          * we need to remember that we're using a
 825                          * non-default setting. */
 826                         modify_window_set = 1;
 827                         break;
 828
 829                 case OPT_FILTER:
 830                         parse_rule(&filter_list, poptGetOptArg(pc), 0, 0);
 831                         break;
 832
 833                 case OPT_EXCLUDE:
 834                         parse_rule(&filter_list, poptGetOptArg(pc),
 835                                    0, XFLG_OLD_PREFIXES);
 836                         break;
 837
 838                 case OPT_INCLUDE:
 839                         parse_rule(&filter_list, poptGetOptArg(pc),
 840                                    MATCHFLG_INCLUDE, XFLG_OLD_PREFIXES);
 841                         break;
 842
 843                 case OPT_EXCLUDE_FROM:
 844                 case OPT_INCLUDE_FROM:
 845                         arg = poptGetOptArg(pc);
 846                         if (sanitize_paths)
 847                                 arg = sanitize_path(NULL, arg, NULL, 0);
 848                         if (server_filter_list.head) {
 849                                 char *cp = (char *)arg;
 850                                 if (!*cp)
 851                                         goto options_rejected;
 852                                 clean_fname(cp, 1);
 853                                 if (check_filter(&server_filter_list, cp, 0) < 0)
 854                                         goto options_rejected;
 855                         }
 856                         parse_filter_file(&filter_list, arg,
 857                                 opt == OPT_INCLUDE_FROM ? MATCHFLG_INCLUDE : 0,
 858                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
 859                         break;
 860
 861                 case 'a':
 862                         if (refused_archive_part) {
 863                                 create_refuse_error(refused_archive_part);
 864                                 return 0;
 865                         }
 866                         if (!recurse) /* preserve recurse == 2 */
 867                                 recurse = 1;
 868 #ifdef SUPPORT_LINKS
 869                         preserve_links = 1;
 870 #endif
 871                         preserve_perms = 1;
 872                         preserve_times = 1;
 873                         preserve_gid = 1;
 874                         preserve_uid = 1;
 875                         preserve_devices = 1;
 876                         break;
 877
 878                 case 'i':
 879                         itemize_changes++;
 880                         break;
 881
 882                 case 'v':
 883                         verbose++;
 884                         break;
 885
 886                 case 'q':
 887                         if (frommain)
 888                                 quiet++;
 889                         break;
 890
 891                 case 'x':
 892                         one_file_system++;
 893                         break;
 894
 895                 case OPT_SENDER:
 896                         if (!am_server) {
 897                                 usage(FERROR);
 898                                 exit_cleanup(RERR_SYNTAX);
 899                         }
 900                         am_sender = 1;
 901                         break;
 902
 903                 case 'F':
 904                         switch (++F_option_cnt) {
 905                         case 1:
 906                                 parse_rule(&filter_list,": /.rsync-filter",0,0);
 907                                 break;
 908                         case 2:
 909                                 parse_rule(&filter_list,"- .rsync-filter",0,0);
 910                                 break;
 911                         }
 912                         break;
 913
 914                 case 'P':
 915                         if (refused_partial || refused_progress) {
 916                                 create_refuse_error(refused_partial
 917                                     ? refused_partial : refused_progress);
 918                                 return 0;
 919                         }
 920                         do_progress = 1;
 921                         keep_partial = 1;
 922                         break;
 923
 924                 case 'z':
 925                         if (def_compress_level < Z_DEFAULT_COMPRESSION
 926                          || def_compress_level > Z_BEST_COMPRESSION) {
 927                                 snprintf(err_buf, sizeof err_buf,
 928                                         "--compress-level value is invalid: %d\n",
 929                                         def_compress_level);
 930                                 return 0;
 931                         }
 932                         do_compression = def_compress_level != Z_NO_COMPRESSION;
 933                         if (do_compression && refused_compress) {
 934                                 create_refuse_error(refused_compress);
 935                                 return 0;
 936                         }
 937                         break;
 938
 939                 case OPT_WRITE_BATCH:
 940                         /* batch_name is already set */
 941                         write_batch = 1;
 942                         break;
 943
 944                 case OPT_ONLY_WRITE_BATCH:
 945                         /* batch_name is already set */
 946                         write_batch = -1;
 947                         break;
 948
 949                 case OPT_READ_BATCH:
 950                         /* batch_name is already set */
 951                         read_batch = 1;
 952                         break;
 953
 954                 case OPT_MAX_SIZE:
 955                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
 956                                 snprintf(err_buf, sizeof err_buf,
 957                                         "--max-size value is invalid: %s\n",
 958                                         max_size_arg);
 959                                 return 0;
 960                         }
 961                         break;
 962
 963                 case OPT_MIN_SIZE:
 964                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
 965                                 snprintf(err_buf, sizeof err_buf,
 966                                         "--min-size value is invalid: %s\n",
 967                                         min_size_arg);
 968                                 return 0;
 969                         }
 970                         break;
 971
 972                 case OPT_LINK_DEST:
 973 #ifdef HAVE_LINK
 974                         link_dest = 1;
 975                         dest_option = "--link-dest";
 976                         goto set_dest_dir;
 977 #else
 978                         snprintf(err_buf, sizeof err_buf,
 979                                  "hard links are not supported on this %s\n",
 980                                  am_server ? "server" : "client");
 981                         return 0;
 982 #endif
 983
 984                 case OPT_COPY_DEST:
 985                         copy_dest = 1;
 986                         dest_option = "--copy-dest";
 987                         goto set_dest_dir;
 988
 989                 case OPT_COMPARE_DEST:
 990                         compare_dest = 1;
 991                         dest_option = "--compare-dest";
 992                 set_dest_dir:
 993                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
 994                                 snprintf(err_buf, sizeof err_buf,
 995                                         "ERROR: at most %d %s args may be specified\n",
 996                                         MAX_BASIS_DIRS, dest_option);
 997                                 return 0;
 998                         }
 999                         arg = poptGetOptArg(pc);
1000                         if (sanitize_paths)
1001                                 arg = sanitize_path(NULL, arg, NULL, 0);
1002                         basis_dir[basis_dir_cnt++] = (char *)arg;
1003                         break;
1004
1005                 case OPT_CHMOD:
1006                         arg = poptGetOptArg(pc);
1007                         if (!(chmod_modes = parse_chmod(arg, chmod_modes))) {
1008                                 snprintf(err_buf, sizeof err_buf,
1009                                     "Invalid argument passed to --chmod (%s)\n",
1010                                     arg);
1011                                 return 0;
1012                         }
1013                         break;
1014
1015                 case OPT_HELP:
1016                         usage(FINFO);
1017                         exit_cleanup(0);
1018
1019                 default:
1020                         /* A large opt value means that set_refuse_options()
1021                          * turned this option off. */
1022                         if (opt >= OPT_REFUSED_BASE) {
1023                                 create_refuse_error(opt);
1024                                 return 0;
1025                         }
1026                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1027                                  am_server ? "on remote machine: " : "",
1028                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1029                                  poptStrerror(opt));
1030                         return 0;
1031                 }
1032         }
1033
1034         if (human_readable && *argc == 2) {
1035                 usage(FINFO);
1036                 exit_cleanup(0);
1037         }
1038
1039 #ifndef SUPPORT_LINKS
1040         if (preserve_links && !am_sender) {
1041                 snprintf(err_buf, sizeof err_buf,
1042                          "symlinks are not supported on this %s\n",
1043                          am_server ? "server" : "client");
1044                 return 0;
1045         }
1046 #endif
1047
1048 #ifndef SUPPORT_HARD_LINKS
1049         if (preserve_hard_links) {
1050                 snprintf(err_buf, sizeof err_buf,
1051                          "hard links are not supported on this %s\n",
1052                          am_server ? "server" : "client");
1053                 return 0;
1054         }
1055 #endif
1056
1057         if (write_batch && read_batch) {
1058                 snprintf(err_buf, sizeof err_buf,
1059                         "--write-batch and --read-batch can not be used together\n");
1060                 return 0;
1061         }
1062         if (write_batch > 0 || read_batch) {
1063                 if (am_server) {
1064                         rprintf(FINFO,
1065                                 "ignoring --%s-batch option sent to server\n",
1066                                 write_batch ? "write" : "read");
1067                         /* We don't actually exit_cleanup(), so that we can
1068                          * still service older version clients that still send
1069                          * batch args to server. */
1070                         read_batch = write_batch = 0;
1071                         batch_name = NULL;
1072                 } else if (dry_run)
1073                         write_batch = 0;
1074         }
1075         if (read_batch && files_from) {
1076                 snprintf(err_buf, sizeof err_buf,
1077                         "--read-batch cannot be used with --files-from\n");
1078                 return 0;
1079         }
1080         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1081                 snprintf(err_buf, sizeof err_buf,
1082                         "the batch-file name must be %d characters or less.\n",
1083                         MAX_BATCH_NAME_LEN);
1084                 return 0;
1085         }
1086
1087         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1088                 snprintf(err_buf, sizeof err_buf,
1089                          "the --temp-dir path is WAY too long.\n");
1090                 return 0;
1091         }
1092
1093         if (compare_dest + copy_dest + link_dest > 1) {
1094                 snprintf(err_buf, sizeof err_buf,
1095                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1096                 return 0;
1097         }
1098
1099         if (files_from) {
1100                 if (recurse == 1) /* preserve recurse == 2 */
1101                         recurse = 0;
1102                 if (xfer_dirs < 0)
1103                         xfer_dirs = 1;
1104         }
1105
1106         if (xfer_dirs < 1)
1107                 xfer_dirs = recurse || list_only;
1108
1109         if (relative_paths < 0)
1110                 relative_paths = files_from? 1 : 0;
1111         if (!relative_paths)
1112                 implied_dirs = 0;
1113
1114         if (!!delete_before + delete_during + delete_after > 1) {
1115                 snprintf(err_buf, sizeof err_buf,
1116                         "You may not combine multiple --delete-WHEN options.\n");
1117                 return 0;
1118         }
1119         if (delete_before || delete_during || delete_after)
1120                 delete_mode = 1;
1121         else if (delete_mode || delete_excluded) {
1122                 if (refused_delete_before) {
1123                         create_refuse_error(refused_delete_before);
1124                         return 0;
1125                 }
1126                 delete_mode = delete_before = 1;
1127         }
1128         saw_delete_opt = delete_mode;
1129         saw_delete_excluded_opt = delete_excluded;
1130         if (!xfer_dirs) {
1131                 delete_before = delete_during = delete_after = 0;
1132                 delete_mode = delete_excluded = 0;
1133         }
1134
1135         if (delete_mode && refused_delete) {
1136                 create_refuse_error(refused_delete);
1137                 return 0;
1138         }
1139
1140         if (remove_sent_files) {
1141                 /* We only want to infer this refusal of --remove-sent-files
1142                  * via the refusal of "delete", not any of the "delete-FOO"
1143                  * options. */
1144                 if (refused_delete && am_sender) {
1145                         create_refuse_error(refused_delete);
1146                         return 0;
1147                 }
1148                 need_messages_from_generator = 1;
1149         }
1150
1151         *argv = poptGetArgs(pc);
1152         *argc = count_args(*argv);
1153
1154         if (sanitize_paths) {
1155                 int i;
1156                 for (i = *argc; i-- > 0; )
1157                         (*argv)[i] = sanitize_path(NULL, (*argv)[i], "", 0);
1158                 if (tmpdir)
1159                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0);
1160                 if (partial_dir)
1161                         partial_dir = sanitize_path(NULL, partial_dir, NULL, 0);
1162                 if (backup_dir)
1163                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0);
1164         }
1165         if (server_filter_list.head && !am_sender) {
1166                 struct filter_list_struct *elp = &server_filter_list;
1167                 int i;
1168                 if (tmpdir) {
1169                         if (!*tmpdir)
1170                                 goto options_rejected;
1171                         clean_fname(tmpdir, 1);
1172                         if (check_filter(elp, tmpdir, 1) < 0)
1173                                 goto options_rejected;
1174                 }
1175                 if (partial_dir && *partial_dir) {
1176                         clean_fname(partial_dir, 1);
1177                         if (check_filter(elp, partial_dir, 1) < 0)
1178                                 goto options_rejected;
1179                 }
1180                 for (i = 0; i < basis_dir_cnt; i++) {
1181                         if (!*basis_dir[i])
1182                                 goto options_rejected;
1183                         clean_fname(basis_dir[i], 1);
1184                         if (check_filter(elp, basis_dir[i], 1) < 0)
1185                                 goto options_rejected;
1186                 }
1187                 if (backup_dir) {
1188                         if (!*backup_dir)
1189                                 goto options_rejected;
1190                         clean_fname(backup_dir, 1);
1191                         if (check_filter(elp, backup_dir, 1) < 0) {
1192                             options_rejected:
1193                                 snprintf(err_buf, sizeof err_buf,
1194                                     "Your options have been rejected by the server.\n");
1195                                 return 0;
1196                         }
1197                 }
1198         }
1199
1200         if (!backup_suffix)
1201                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
1202         backup_suffix_len = strlen(backup_suffix);
1203         if (strchr(backup_suffix, '/') != NULL) {
1204                 snprintf(err_buf, sizeof err_buf,
1205                         "--suffix cannot contain slashes: %s\n",
1206                         backup_suffix);
1207                 return 0;
1208         }
1209         if (backup_dir) {
1210                 backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
1211                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
1212                 if (backup_dir_remainder < 32) {
1213                         snprintf(err_buf, sizeof err_buf,
1214                                 "the --backup-dir path is WAY too long.\n");
1215                         return 0;
1216                 }
1217                 if (backup_dir_buf[backup_dir_len - 1] != '/') {
1218                         backup_dir_buf[backup_dir_len++] = '/';
1219                         backup_dir_buf[backup_dir_len] = '\0';
1220                 }
1221                 if (verbose > 1 && !am_sender)
1222                         rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
1223         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
1224                 snprintf(err_buf, sizeof err_buf,
1225                         "--suffix cannot be a null string without --backup-dir\n");
1226                 return 0;
1227         } else if (delete_mode && !delete_excluded) {
1228                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
1229                         "P *%s", backup_suffix);
1230                 parse_rule(&filter_list, backup_dir_buf, 0, 0);
1231         }
1232         if (make_backups && !backup_dir)
1233                 omit_dir_times = 1;
1234
1235         if (log_format) {
1236                 if (am_server && log_format_has(log_format, 'I'))
1237                         log_format_has_i = 2;
1238                 else if (log_format_has(log_format, 'i'))
1239                         log_format_has_i = itemize_changes | 1;
1240                 if (!log_format_has(log_format, 'b')
1241                  && !log_format_has(log_format, 'c'))
1242                         log_before_transfer = !am_server;
1243         } else if (itemize_changes) {
1244                 log_format = "%i %n%L";
1245                 log_format_has_i = itemize_changes;
1246                 log_before_transfer = !am_server;
1247         }
1248
1249         if ((do_progress || dry_run) && !verbose && !log_before_transfer
1250             && !am_server)
1251                 verbose = 1;
1252
1253         if (dry_run)
1254                 do_xfers = 0;
1255
1256         set_io_timeout(io_timeout);
1257
1258         if (verbose && !log_format) {
1259                 log_format = "%n%L";
1260                 log_before_transfer = !am_server;
1261         }
1262         if (log_format_has_i || log_format_has(log_format, 'o'))
1263                 log_format_has_o_or_i = 1;
1264
1265         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
1266                 bwlimit = daemon_bwlimit;
1267         if (bwlimit) {
1268                 bwlimit_writemax = (size_t)bwlimit * 128;
1269                 if (bwlimit_writemax < 512)
1270                         bwlimit_writemax = 512;
1271         }
1272
1273         if (sparse_files && inplace) {
1274                 /* Note: we don't check for this below, because --append is
1275                  * OK with --sparse (as long as redos are handled right). */
1276                 snprintf(err_buf, sizeof err_buf,
1277                          "--sparse cannot be used with --inplace\n");
1278                 return 0;
1279         }
1280
1281         if (append_mode) {
1282                 if (whole_file > 0) {
1283                         snprintf(err_buf, sizeof err_buf,
1284                                  "--append cannot be used with --whole-file\n");
1285                         return 0;
1286                 }
1287                 if (refused_inplace) {
1288                         create_refuse_error(refused_inplace);
1289                         return 0;
1290                 }
1291                 inplace = 1;
1292         }
1293
1294         if (delay_updates && !partial_dir)
1295                 partial_dir = partialdir_for_delayupdate;
1296
1297         if (inplace) {
1298 #ifdef HAVE_FTRUNCATE
1299                 if (partial_dir) {
1300                         snprintf(err_buf, sizeof err_buf,
1301                                  "--%s cannot be used with --%s\n",
1302                                  append_mode ? "append" : "inplace",
1303                                  delay_updates ? "delay-updates" : "partial-dir");
1304                         return 0;
1305                 }
1306                 /* --inplace implies --partial for refusal purposes, but we
1307                  * clear the keep_partial flag for internal logic purposes. */
1308                 if (refused_partial) {
1309                         create_refuse_error(refused_partial);
1310                         return 0;
1311                 }
1312                 keep_partial = 0;
1313 #else
1314                 snprintf(err_buf, sizeof err_buf,
1315                          "--%s is not supported on this %s\n",
1316                          append_mode ? "append" : "inplace",
1317                          am_server ? "server" : "client");
1318                 return 0;
1319 #endif
1320         } else {
1321                 if (keep_partial && !partial_dir) {
1322                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
1323                                 partial_dir = strdup(arg);
1324                 }
1325                 if (partial_dir) {
1326                         if (*partial_dir)
1327                                 clean_fname(partial_dir, 1);
1328                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
1329                                 partial_dir = NULL;
1330                         else if (*partial_dir != '/') {
1331                                 parse_rule(&filter_list, partial_dir,
1332                                     MATCHFLG_NO_PREFIXES|MATCHFLG_DIRECTORY, 0);
1333                         }
1334                         if (!partial_dir && refused_partial) {
1335                                 create_refuse_error(refused_partial);
1336                                 return 0;
1337                         }
1338                         keep_partial = 1;
1339                 }
1340         }
1341
1342         if (files_from) {
1343                 char *h, *p;
1344                 int q;
1345                 if (*argc > 2 || (!am_daemon && *argc == 1)) {
1346                         usage(FERROR);
1347                         exit_cleanup(RERR_SYNTAX);
1348                 }
1349                 if (strcmp(files_from, "-") == 0) {
1350                         filesfrom_fd = 0;
1351                         if (am_server)
1352                                 filesfrom_host = ""; /* reading from socket */
1353                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
1354                         if (am_server) {
1355                                 snprintf(err_buf, sizeof err_buf,
1356                                         "The --files-from sent to the server cannot specify a host.\n");
1357                                 return 0;
1358                         }
1359                         files_from = p;
1360                         filesfrom_host = h;
1361                         if (strcmp(files_from, "-") == 0) {
1362                                 snprintf(err_buf, sizeof err_buf,
1363                                         "Invalid --files-from remote filename\n");
1364                                 return 0;
1365                         }
1366                 } else {
1367                         if (sanitize_paths)
1368                                 files_from = sanitize_path(NULL, files_from, NULL, 0);
1369                         if (server_filter_list.head) {
1370                                 if (!*files_from)
1371                                         goto options_rejected;
1372                                 clean_fname(files_from, 1);
1373                                 if (check_filter(&server_filter_list, files_from, 0) < 0)
1374                                         goto options_rejected;
1375                         }
1376                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
1377                         if (filesfrom_fd < 0) {
1378                                 snprintf(err_buf, sizeof err_buf,
1379                                         "failed to open files-from file %s: %s\n",
1380                                         files_from, strerror(errno));
1381                                 return 0;
1382                         }
1383                 }
1384         }
1385
1386         am_starting_up = 0;
1387
1388         return 1;
1389 }
1390
1391
1392 /**
1393  * Construct a filtered list of options to pass through from the
1394  * client to the server.
1395  *
1396  * This involves setting options that will tell the server how to
1397  * behave, and also filtering out options that are processed only
1398  * locally.
1399  **/
1400 void server_options(char **args,int *argc)
1401 {
1402         static char argstr[64];
1403         int ac = *argc;
1404         char *arg;
1405
1406         int i, x;
1407
1408         if (blocking_io == -1)
1409                 blocking_io = 0;
1410
1411         args[ac++] = "--server";
1412
1413         if (daemon_over_rsh) {
1414                 args[ac++] = "--daemon";
1415                 *argc = ac;
1416                 /* if we're passing --daemon, we're done */
1417                 return;
1418         }
1419
1420         if (!am_sender)
1421                 args[ac++] = "--sender";
1422
1423         x = 1;
1424         argstr[0] = '-';
1425         for (i = 0; i < verbose; i++)
1426                 argstr[x++] = 'v';
1427
1428         /* the -q option is intentionally left out */
1429         if (make_backups)
1430                 argstr[x++] = 'b';
1431         if (update_only)
1432                 argstr[x++] = 'u';
1433         if (!do_xfers) /* NOT "dry_run"! */
1434                 argstr[x++] = 'n';
1435         if (preserve_links)
1436                 argstr[x++] = 'l';
1437         if (copy_links)
1438                 argstr[x++] = 'L';
1439         if (xfer_dirs > (recurse || !delete_mode || !am_sender))
1440                 argstr[x++] = 'd';
1441         if (keep_dirlinks && am_sender)
1442                 argstr[x++] = 'K';
1443
1444         if (whole_file > 0)
1445                 argstr[x++] = 'W';
1446         /* We don't need to send --no-whole-file, because it's the
1447          * default for remote transfers, and in any case old versions
1448          * of rsync will not understand it. */
1449
1450         if (preserve_hard_links)
1451                 argstr[x++] = 'H';
1452         if (preserve_uid)
1453                 argstr[x++] = 'o';
1454         if (preserve_gid)
1455                 argstr[x++] = 'g';
1456         if (preserve_devices)
1457                 argstr[x++] = 'D';
1458         if (preserve_times)
1459                 argstr[x++] = 't';
1460         if (omit_dir_times == 2 && am_sender)
1461                 argstr[x++] = 'O';
1462         if (preserve_perms)
1463                 argstr[x++] = 'p';
1464         if (recurse)
1465                 argstr[x++] = 'r';
1466         if (always_checksum)
1467                 argstr[x++] = 'c';
1468         if (cvs_exclude)
1469                 argstr[x++] = 'C';
1470         if (ignore_times)
1471                 argstr[x++] = 'I';
1472         if (relative_paths)
1473                 argstr[x++] = 'R';
1474         if (one_file_system) {
1475                 argstr[x++] = 'x';
1476                 if (one_file_system > 1)
1477                         argstr[x++] = 'x';
1478         }
1479         if (sparse_files)
1480                 argstr[x++] = 'S';
1481         if (do_compression)
1482                 argstr[x++] = 'z';
1483
1484         /* This is a complete hack - blame Rusty.  FIXME!
1485          * This hack is only needed for older rsync versions that
1486          * don't understand the --list-only option. */
1487         if (list_only == 1 && !recurse)
1488                 argstr[x++] = 'r';
1489
1490         argstr[x] = '\0';
1491
1492         if (x != 1)
1493                 args[ac++] = argstr;
1494
1495         if (list_only > 1)
1496                 args[ac++] = "--list-only";
1497
1498         /* This makes sure that the remote rsync can handle deleting with -d
1499          * sans -r because the --no-r option was added at the same time. */
1500         if (xfer_dirs && !recurse && delete_mode && am_sender)
1501                 args[ac++] = "--no-r";
1502
1503         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
1504                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
1505                         goto oom;
1506                 args[ac++] = arg;
1507         }
1508
1509         /* The server side doesn't use our log-format, but in certain
1510          * circumstances they need to know a little about the option. */
1511         if (log_format && am_sender) {
1512                 if (log_format_has_i > 1)
1513                         args[ac++] = "--log-format=%i%I";
1514                 else if (log_format_has_i)
1515                         args[ac++] = "--log-format=%i";
1516                 else if (log_format_has_o_or_i)
1517                         args[ac++] = "--log-format=%o";
1518                 else if (!verbose)
1519                         args[ac++] = "--log-format=X";
1520         }
1521
1522         if (block_size) {
1523                 if (asprintf(&arg, "-B%lu", block_size) < 0)
1524                         goto oom;
1525                 args[ac++] = arg;
1526         }
1527
1528         if (max_delete && am_sender) {
1529                 if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
1530                         goto oom;
1531                 args[ac++] = arg;
1532         }
1533
1534         if (min_size && am_sender) {
1535                 args[ac++] = "--min-size";
1536                 args[ac++] = min_size_arg;
1537         }
1538
1539         if (max_size && am_sender) {
1540                 args[ac++] = "--max-size";
1541                 args[ac++] = max_size_arg;
1542         }
1543
1544         if (io_timeout) {
1545                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
1546                         goto oom;
1547                 args[ac++] = arg;
1548         }
1549
1550         if (bwlimit) {
1551                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
1552                         goto oom;
1553                 args[ac++] = arg;
1554         }
1555
1556         if (backup_dir) {
1557                 args[ac++] = "--backup-dir";
1558                 args[ac++] = backup_dir;
1559         }
1560
1561         /* Only send --suffix if it specifies a non-default value. */
1562         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
1563                 /* We use the following syntax to avoid weirdness with '~'. */
1564                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
1565                         goto oom;
1566                 args[ac++] = arg;
1567         }
1568
1569         if (am_sender) {
1570                 if (delete_excluded)
1571                         args[ac++] = "--delete-excluded";
1572                 else if (delete_before == 1 || delete_after)
1573                         args[ac++] = "--delete";
1574                 if (delete_before > 1)
1575                         args[ac++] = "--delete-before";
1576                 if (delete_during)
1577                         args[ac++] = "--delete-during";
1578                 if (delete_after)
1579                         args[ac++] = "--delete-after";
1580                 if (force_delete)
1581                         args[ac++] = "--force";
1582                 if (write_batch < 0)
1583                         args[ac++] = "--only-write-batch=X";
1584         }
1585
1586         if (size_only)
1587                 args[ac++] = "--size-only";
1588
1589         if (modify_window_set) {
1590                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
1591                         goto oom;
1592                 args[ac++] = arg;
1593         }
1594
1595         if (checksum_seed) {
1596                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
1597                         goto oom;
1598                 args[ac++] = arg;
1599         }
1600
1601         if (partial_dir && am_sender) {
1602                 if (partial_dir != partialdir_for_delayupdate) {
1603                         args[ac++] = "--partial-dir";
1604                         args[ac++] = partial_dir;
1605                 }
1606                 if (delay_updates)
1607                         args[ac++] = "--delay-updates";
1608         } else if (keep_partial)
1609                 args[ac++] = "--partial";
1610
1611         if (ignore_errors)
1612                 args[ac++] = "--ignore-errors";
1613
1614         if (copy_unsafe_links)
1615                 args[ac++] = "--copy-unsafe-links";
1616
1617         if (safe_symlinks)
1618                 args[ac++] = "--safe-links";
1619
1620         if (numeric_ids)
1621                 args[ac++] = "--numeric-ids";
1622
1623         if (ignore_existing && am_sender)
1624                 args[ac++] = "--ignore-existing";
1625
1626         /* Backward compatibility: send --existing, not --ignore-non-existing. */
1627         if (ignore_non_existing && am_sender)
1628                 args[ac++] = "--existing";
1629
1630         if (append_mode)
1631                 args[ac++] = "--append";
1632         else if (inplace)
1633                 args[ac++] = "--inplace";
1634
1635         if (tmpdir) {
1636                 args[ac++] = "--temp-dir";
1637                 args[ac++] = tmpdir;
1638         }
1639
1640         if (basis_dir[0] && am_sender) {
1641                 /* the server only needs this option if it is not the sender,
1642                  *   and it may be an older version that doesn't know this
1643                  *   option, so don't send it if client is the sender.
1644                  */
1645                 int i;
1646                 for (i = 0; i < basis_dir_cnt; i++) {
1647                         args[ac++] = dest_option;
1648                         args[ac++] = basis_dir[i];
1649                 }
1650         }
1651
1652         if (files_from && (!am_sender || filesfrom_host)) {
1653                 if (filesfrom_host) {
1654                         args[ac++] = "--files-from";
1655                         args[ac++] = files_from;
1656                         if (eol_nulls)
1657                                 args[ac++] = "--from0";
1658                 } else {
1659                         args[ac++] = "--files-from=-";
1660                         args[ac++] = "--from0";
1661                 }
1662                 if (!relative_paths)
1663                         args[ac++] = "--no-relative";
1664         }
1665         if (relative_paths && !implied_dirs && !am_sender)
1666                 args[ac++] = "--no-implied-dirs";
1667
1668         if (fuzzy_basis && am_sender)
1669                 args[ac++] = "--fuzzy";
1670
1671         if (remove_sent_files)
1672                 args[ac++] = "--remove-sent-files";
1673
1674         *argc = ac;
1675         return;
1676
1677     oom:
1678         out_of_memory("server_options");
1679 }
1680
1681 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
1682  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
1683  * memory with the HOST.  If a daemon-accessing spec was specified, the value
1684  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
1685  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
1686  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
1687  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
1688 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
1689 {
1690         char *p;
1691         int not_host;
1692
1693         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
1694                 char *path;
1695                 int hostlen;
1696                 s += strlen(URL_PREFIX);
1697                 if ((p = strchr(s, '/')) != NULL) {
1698                         hostlen = p - s;
1699                         path = p + 1;
1700                 } else {
1701                         hostlen = strlen(s);
1702                         path = "";
1703                 }
1704                 if (*s == '[' && (p = strchr(s, ']')) != NULL) {
1705                         s++;
1706                         hostlen = p - s;
1707                         if (p[1] == ':')
1708                                 *port_ptr = atoi(p+2);
1709                 } else {
1710                         if ((p = strchr(s, ':')) != NULL) {
1711                                 hostlen = p - s;
1712                                 *port_ptr = atoi(p+1);
1713                         }
1714                 }
1715                 if (!*port_ptr)
1716                         *port_ptr = RSYNC_PORT;
1717                 *host_ptr = new_array(char, hostlen + 1);
1718                 strlcpy(*host_ptr, s, hostlen + 1);
1719                 return path;
1720         }
1721
1722         if (*s == '[' && (p = strchr(s, ']')) != NULL && p[1] == ':') {
1723                 s++;
1724                 *p = '\0';
1725                 not_host = strchr(s, '/') || !strchr(s, ':');
1726                 *p = ']';
1727                 if (not_host)
1728                         return NULL;
1729                 p++;
1730         } else {
1731                 if (!(p = strchr(s, ':')))
1732                         return NULL;
1733                 *p = '\0';
1734                 not_host = strchr(s, '/') != NULL;
1735                 *p = ':';
1736                 if (not_host)
1737                         return NULL;
1738         }
1739
1740         *host_ptr = new_array(char, p - s + 1);
1741         strlcpy(*host_ptr, s, p - s + 1);
1742
1743         if (p[1] == ':') {
1744                 if (port_ptr && !*port_ptr)
1745                         *port_ptr = RSYNC_PORT;
1746                 return p + 2;
1747         }
1748         if (port_ptr)
1749                 *port_ptr = 0;
1750
1751         return p + 1;
1752 }