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