b720565eb3984f662fecb76b762397b520ce8a7b
[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) 2002-2007 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 version 2 as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
20  */
21
22 #include "rsync.h"
23 #include <popt.h>
24 #include "zlib/zlib.h"
25
26 extern int module_id;
27 extern int sanitize_paths;
28 extern struct filter_list_struct filter_list;
29 extern struct filter_list_struct server_filter_list;
30
31 int make_backups = 0;
32
33 /**
34  * If 1, send the whole file as literal data rather than trying to
35  * create an incremental diff.
36  *
37  * If -1, then look at whether we're local or remote and go by that.
38  *
39  * @sa disable_deltas_p()
40  **/
41 int whole_file = -1;
42
43 int append_mode = 0;
44 int keep_dirlinks = 0;
45 int copy_dirlinks = 0;
46 int copy_links = 0;
47 int preserve_links = 0;
48 int preserve_hard_links = 0;
49 int preserve_perms = 0;
50 int preserve_executability = 0;
51 int preserve_devices = 0;
52 int preserve_specials = 0;
53 int preserve_uid = 0;
54 int preserve_gid = 0;
55 int preserve_times = 0;
56 int omit_dir_times = 0;
57 int update_only = 0;
58 int cvs_exclude = 0;
59 int dry_run = 0;
60 int do_xfers = 1;
61 int ignore_times = 0;
62 int delete_mode = 0;
63 int delete_during = 0;
64 int delete_before = 0;
65 int delete_after = 0;
66 int delete_excluded = 0;
67 int remove_source_files = 0;
68 int one_file_system = 0;
69 int protocol_version = PROTOCOL_VERSION;
70 int sparse_files = 0;
71 int do_compression = 0;
72 int def_compress_level = Z_DEFAULT_COMPRESSION;
73 int am_root = 0;
74 int am_server = 0;
75 int am_sender = 0;
76 int am_generator = 0;
77 int am_starting_up = 1;
78 int relative_paths = -1;
79 int implied_dirs = 1;
80 int numeric_ids = 0;
81 int allow_8bit_chars = 0;
82 int force_delete = 0;
83 int io_timeout = 0;
84 int allowed_lull = 0;
85 int prune_empty_dirs = 0;
86 char *files_from = NULL;
87 int filesfrom_fd = -1;
88 char *filesfrom_host = NULL;
89 int eol_nulls = 0;
90 int human_readable = 0;
91 int recurse = 0;
92 int xfer_dirs = -1;
93 int am_daemon = 0;
94 int daemon_over_rsh = 0;
95 int do_stats = 0;
96 int do_progress = 0;
97 int keep_partial = 0;
98 int safe_symlinks = 0;
99 int copy_unsafe_links = 0;
100 int size_only = 0;
101 int daemon_bwlimit = 0;
102 int bwlimit = 0;
103 int fuzzy_basis = 0;
104 size_t bwlimit_writemax = 0;
105 int ignore_existing = 0;
106 int ignore_non_existing = 0;
107 int need_messages_from_generator = 0;
108 int max_delete = -1;
109 OFF_T max_size = 0;
110 OFF_T min_size = 0;
111 int ignore_errors = 0;
112 int modify_window = 0;
113 int blocking_io = -1;
114 int checksum_seed = 0;
115 int inplace = 0;
116 int delay_updates = 0;
117 long block_size = 0; /* "long" because popt can't set an int32. */
118
119 /** Network address family. **/
120 #ifdef INET6
121 int default_af_hint = 0;        /* Any protocol */
122 #else
123 int default_af_hint = AF_INET;  /* Must use IPv4 */
124 #endif
125
126 /** Do not go into the background when run as --daemon.  Good
127  * for debugging and required for running as a service on W32,
128  * or under Unix process-monitors. **/
129 int no_detach
130 #if defined _WIN32 || defined __WIN32__
131         = 1;
132 #else
133         = 0;
134 #endif
135
136 int write_batch = 0;
137 int read_batch = 0;
138 int backup_dir_len = 0;
139 int backup_suffix_len;
140 unsigned int backup_dir_remainder;
141
142 char *backup_suffix = NULL;
143 char *tmpdir = NULL;
144 char *partial_dir = NULL;
145 char *basis_dir[MAX_BASIS_DIRS+1];
146 char *config_file = NULL;
147 char *shell_cmd = NULL;
148 char *logfile_name = NULL;
149 char *logfile_format = NULL;
150 char *stdout_format = NULL;
151 char *password_file = NULL;
152 char *rsync_path = RSYNC_PATH;
153 char *backup_dir = NULL;
154 char backup_dir_buf[MAXPATHLEN];
155 char *sockopts = NULL;
156 int rsync_port = 0;
157 int compare_dest = 0;
158 int copy_dest = 0;
159 int link_dest = 0;
160 int basis_dir_cnt = 0;
161 char *dest_option = NULL;
162
163 int verbose = 0;
164 int quiet = 0;
165 int output_motd = 1;
166 int log_before_transfer = 0;
167 int stdout_format_has_i = 0;
168 int stdout_format_has_o_or_i = 0;
169 int logfile_format_has_i = 0;
170 int logfile_format_has_o_or_i = 0;
171 int always_checksum = 0;
172 int list_only = 0;
173
174 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
175 char *batch_name = NULL;
176
177 struct chmod_mode_struct *chmod_modes = NULL;
178
179 static int daemon_opt;   /* sets am_daemon after option error-reporting */
180 static int F_option_cnt = 0;
181 static int modify_window_set;
182 static int itemize_changes = 0;
183 static int refused_delete, refused_archive_part, refused_compress;
184 static int refused_partial, refused_progress, refused_delete_before;
185 static int refused_delete_during;
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) 1996-2007 by Andrew Tridgell, Wayne Davison, and others.\n");
228         rprintf(f, "<http://rsync.samba.org/>\n");
229         rprintf(f, "Capabilities: %d-bit files, %d-bit system inums, %d-bit internal inums,\n",
230                 (int)(sizeof (OFF_T) * 8),
231                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
232                 (int)(sizeof (int64) * 8));
233         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
234                 got_socketpair, hardlinks, links, ipv6, have_inplace);
235         rprintf(f, "    %sappend\n",
236                 have_inplace);
237
238 #ifdef MAINTAINER_MODE
239         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
240 #endif
241
242 #if SIZEOF_INT64 < 8
243         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
244 #endif
245         if (sizeof (int64) != SIZEOF_INT64) {
246                 rprintf(f,
247                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
248                         (int) SIZEOF_INT64, (int) sizeof (int64));
249         }
250
251         rprintf(f,"\n");
252         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
253         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
254         rprintf(f,"General Public Licence for details.\n");
255 }
256
257
258 void usage(enum logcode F)
259 {
260   print_rsync_version(F);
261
262   rprintf(F,"\n");
263   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
264   rprintf(F,"via a fast differencing algorithm.\n");
265
266   rprintf(F,"\n");
267   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
268   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
269   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
270   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
271   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
272   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
273   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
274   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
275   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
276   rprintf(F,"\n");
277   rprintf(F,"Options\n");
278   rprintf(F," -v, --verbose               increase verbosity\n");
279   rprintf(F," -q, --quiet                 suppress non-error messages\n");
280   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
281   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
282   rprintf(F," -a, --archive               archive mode; same as -rlptgoD (no -H)\n");
283   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
284   rprintf(F," -r, --recursive             recurse into directories\n");
285   rprintf(F," -R, --relative              use relative path names\n");
286   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
287   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
288   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
289   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
290   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
291   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
292   rprintf(F,"     --append                append data onto shorter files\n");
293   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
294   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
295   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
296   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
297   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
298   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
299   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
300   rprintf(F," -H, --hard-links            preserve hard links\n");
301   rprintf(F," -p, --perms                 preserve permissions\n");
302   rprintf(F," -E, --executability         preserve the file's executability\n");
303   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
304   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
305   rprintf(F," -g, --group                 preserve group\n");
306   rprintf(F,"     --devices               preserve device files (super-user only)\n");
307   rprintf(F,"     --specials              preserve special files\n");
308   rprintf(F," -D                          same as --devices --specials\n");
309   rprintf(F," -t, --times                 preserve times\n");
310   rprintf(F," -O, --omit-dir-times        omit directories when preserving times\n");
311   rprintf(F,"     --super                 receiver attempts super-user activities\n");
312   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
313   rprintf(F," -n, --dry-run               show what would have been transferred\n");
314   rprintf(F," -W, --whole-file            copy files whole (without rsync algorithm)\n");
315   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
316   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
317   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
318   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
319   rprintf(F,"     --existing              skip creating new files on receiver\n");
320   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
321   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
322   rprintf(F,"     --del                   an alias for --delete-during\n");
323   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
324   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
325   rprintf(F,"     --delete-during         receiver deletes during transfer (default)\n");
326   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
327   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
328   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
329   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
330   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
331   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
332   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
333   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
334   rprintf(F,"     --partial               keep partially transferred files\n");
335   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
336   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
337   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
338   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
339   rprintf(F,"     --timeout=TIME          set I/O timeout in seconds\n");
340   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
341   rprintf(F,"     --size-only             skip files that match in size\n");
342   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
343   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
344   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
345   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
346   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
347   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
348   rprintf(F," -z, --compress              compress file data during the transfer\n");
349   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
350   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
351   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
352   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
353   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
354   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
355   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
356   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
357   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
358   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
359   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
360   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
361   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
362   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
363   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
364   rprintf(F,"     --stats                 give some file-transfer stats\n");
365   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
366   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
367   rprintf(F,"     --progress              show progress during transfer\n");
368   rprintf(F," -P                          same as --partial --progress\n");
369   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
370   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
371   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
372   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
373   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
374   rprintf(F,"     --list-only             list the files instead of copying them\n");
375   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
376   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
377   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
378   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
379   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
380 #ifdef INET6
381   rprintf(F," -4, --ipv4                  prefer IPv4\n");
382   rprintf(F," -6, --ipv6                  prefer IPv6\n");
383 #endif
384   rprintf(F,"     --version               print version number\n");
385   rprintf(F,"(-h) --help                  show this help (-h works with no other options)\n");
386
387   rprintf(F,"\n");
388   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
389   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
390   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
391 }
392
393 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
394       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
395       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
396       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
397       OPT_NO_D,
398       OPT_SERVER, OPT_REFUSED_BASE = 9000};
399
400 static struct poptOption long_options[] = {
401   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
402   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
403   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
404   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
405   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
406   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
407   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
408   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
409   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
410   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
411   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
412   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
413   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
414   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
415   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
416   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
417   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
418   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
419   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
420   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
421   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
422   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
423   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
424   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
425   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
426   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
427   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 2, 0, 0 },
428   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
429   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
430   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
431   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
432   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
433   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
434   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
435   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
436   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
437   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
438   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
439   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
440   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
441   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
442   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
443   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
444   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
445   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
446   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
447   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
448   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
449   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
450   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
451   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
452   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
453   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
454   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
455   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
456   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
457   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
458   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
459   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
460   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
461   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
462   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
463   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
464   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
465   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
466   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
467   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
468   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
469   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files, 0, 0, 0 },
470   {"inplace",          0,  POPT_ARG_NONE,   &inplace, 0, 0, 0 },
471   {"append",           0,  POPT_ARG_VAL,    &append_mode, 1, 0, 0 },
472   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
473   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
474   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
475   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
476   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
477   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
478   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
479   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
480   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
481   {"force",            0,  POPT_ARG_NONE,   &force_delete, 0, 0, 0 },
482   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors, 0, 0, 0 },
483   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
484   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
485   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
486   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
487   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
488   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
489   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
490   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
491   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
492   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
493   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
494   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum, 0, 0, 0 },
495   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
496   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
497   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
498   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
499   {"fuzzy",           'y', POPT_ARG_NONE,   &fuzzy_basis, 0, 0, 0 },
500   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
501   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
502   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
503   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
504   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
505   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
506   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
507   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
508   {"delay-updates",    0,  POPT_ARG_NONE,   &delay_updates, 0, 0, 0 },
509   {"prune-empty-dirs",'m', POPT_ARG_NONE,   &prune_empty_dirs, 0, 0, 0 },
510   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
511   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
512   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
513   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
514   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
515   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
516   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
517   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
518   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
519   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
520   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
521   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
522   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
523   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
524   {"from0",           '0', POPT_ARG_NONE,   &eol_nulls, 0, 0, 0},
525   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids, 0, 0, 0 },
526   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
527   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
528   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
529   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
530 #ifdef INET6
531   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
532   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
533 #endif
534   {"8-bit-output",    '8', POPT_ARG_NONE,   &allow_8bit_chars, 0, 0, 0 },
535   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
536   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
537   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
538   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
539   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
540   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
541   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
542   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
543   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
544   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
545   /* All the following options switch us into daemon-mode option-parsing. */
546   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
547   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
548   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
549   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
550   {0,0,0,0, 0, 0, 0}
551 };
552
553 static void daemon_usage(enum logcode F)
554 {
555   print_rsync_version(F);
556
557   rprintf(F,"\n");
558   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
559   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
560   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth; KBytes per second\n");
561   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
562   rprintf(F,"     --no-detach             do not detach from the parent\n");
563   rprintf(F,"     --port=PORT             listen on alternate port number\n");
564   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
565   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
566   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
567   rprintf(F," -v, --verbose               increase verbosity\n");
568 #ifdef INET6
569   rprintf(F," -4, --ipv4                  prefer IPv4\n");
570   rprintf(F," -6, --ipv6                  prefer IPv6\n");
571 #endif
572   rprintf(F,"     --help                  show this help screen\n");
573
574   rprintf(F,"\n");
575   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
576   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
577 }
578
579 static struct poptOption long_daemon_options[] = {
580   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
581   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
582   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
583   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
584   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
585 #ifdef INET6
586   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
587   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
588 #endif
589   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
590   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
591   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
592   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
593   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
594   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
595   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
596   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
597   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
598   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
599   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
600   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
601   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
602   {0,0,0,0, 0, 0, 0}
603 };
604
605
606 static char err_buf[200];
607
608
609 /**
610  * Store the option error message, if any, so that we can log the
611  * connection attempt (which requires parsing the options), and then
612  * show the error later on.
613  **/
614 void option_error(void)
615 {
616         if (!err_buf[0]) {
617                 strlcpy(err_buf, "Error parsing options: option may "
618                         "be supported on client but not on server?\n",
619                         sizeof err_buf);
620         }
621
622         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
623         msleep(20);
624 }
625
626
627 /**
628  * Tweak the option table to disable all options that the rsyncd.conf
629  * file has told us to refuse.
630  **/
631 static void set_refuse_options(char *bp)
632 {
633         struct poptOption *op;
634         char *cp, shortname[2];
635         int is_wild, found_match;
636
637         shortname[1] = '\0';
638
639         while (1) {
640                 while (*bp == ' ') bp++;
641                 if (!*bp)
642                         break;
643                 if ((cp = strchr(bp, ' ')) != NULL)
644                         *cp= '\0';
645                 is_wild = strpbrk(bp, "*?[") != NULL;
646                 found_match = 0;
647                 for (op = long_options; ; op++) {
648                         *shortname = op->shortName;
649                         if (!op->longName && !*shortname)
650                                 break;
651                         if ((op->longName && wildmatch(bp, op->longName))
652                             || (*shortname && wildmatch(bp, shortname))) {
653                                 if (op->argInfo == POPT_ARG_VAL)
654                                         op->argInfo = POPT_ARG_NONE;
655                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
656                                 found_match = 1;
657                                 /* These flags are set to let us easily check
658                                  * an implied option later in the code. */
659                                 switch (*shortname) {
660                                 case 'r': case 'd': case 'l': case 'p':
661                                 case 't': case 'g': case 'o': case 'D':
662                                         refused_archive_part = op->val;
663                                         break;
664                                 case 'z':
665                                         refused_compress = op->val;
666                                         break;
667                                 case '\0':
668                                         if (wildmatch("delete", op->longName))
669                                                 refused_delete = op->val;
670                                         else if (wildmatch("delete-before", op->longName))
671                                                 refused_delete_before = op->val;
672                                         else if (wildmatch("delete-during", op->longName))
673                                                 refused_delete_during = op->val;
674                                         else if (wildmatch("partial", op->longName))
675                                                 refused_partial = op->val;
676                                         else if (wildmatch("progress", op->longName))
677                                                 refused_progress = op->val;
678                                         else if (wildmatch("inplace", op->longName))
679                                                 refused_inplace = op->val;
680                                         break;
681                                 }
682                                 if (!is_wild)
683                                         break;
684                         }
685                 }
686                 if (!found_match) {
687                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
688                                 bp);
689                 }
690                 if (!cp)
691                         break;
692                 *cp = ' ';
693                 bp = cp + 1;
694         }
695 }
696
697
698 static int count_args(const char **argv)
699 {
700         int i = 0;
701
702         if (argv) {
703                 while (argv[i] != NULL)
704                         i++;
705         }
706
707         return i;
708 }
709
710
711 static OFF_T parse_size_arg(char **size_arg, char def_suf)
712 {
713         int reps, mult, make_compatible = 0;
714         const char *arg;
715         OFF_T size = 1;
716
717         for (arg = *size_arg; isDigit(arg); arg++) {}
718         if (*arg == '.')
719                 for (arg++; isDigit(arg); arg++) {}
720         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
721         case 'b': case 'B':
722                 reps = 0;
723                 break;
724         case 'k': case 'K':
725                 reps = 1;
726                 break;
727         case 'm': case 'M':
728                 reps = 2;
729                 break;
730         case 'g': case 'G':
731                 reps = 3;
732                 break;
733         default:
734                 return -1;
735         }
736         if (*arg == 'b' || *arg == 'B')
737                 mult = 1000, make_compatible = 1, arg++;
738         else if (!*arg || *arg == '+' || *arg == '-')
739                 mult = 1024;
740         else if (strncasecmp(arg, "ib", 2) == 0)
741                 mult = 1024, arg += 2;
742         else
743                 return -1;
744         while (reps--)
745                 size *= mult;
746         size *= atof(*size_arg);
747         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
748                 size += atoi(arg), make_compatible = 1, arg += 2;
749         if (*arg)
750                 return -1;
751         if (size > 0 && make_compatible) {
752                 /* We convert this manually because we may need %lld precision,
753                  * and that's not a portable sprintf() escape. */
754                 char buf[128], *s = buf + sizeof buf - 1;
755                 OFF_T num = size;
756                 *s = '\0';
757                 while (num) {
758                         *--s = (char)(num % 10) + '0';
759                         num /= 10;
760                 }
761                 if (!(*size_arg = strdup(s)))
762                         out_of_memory("parse_size_arg");
763         }
764         return size;
765 }
766
767
768 static void create_refuse_error(int which)
769 {
770         /* The "which" value is the index + OPT_REFUSED_BASE. */
771         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
772         int n = snprintf(err_buf, sizeof err_buf,
773                          "The server is configured to refuse --%s\n",
774                          op->longName) - 1;
775         if (op->shortName) {
776                 snprintf(err_buf + n, sizeof err_buf - n,
777                          " (-%c)\n", op->shortName);
778         }
779 }
780
781
782 /**
783  * Process command line arguments.  Called on both local and remote.
784  *
785  * @retval 1 if all options are OK; with globals set to appropriate
786  * values
787  *
788  * @retval 0 on error, with err_buf containing an explanation
789  **/
790 int parse_arguments(int *argc, const char ***argv, int frommain)
791 {
792         int opt;
793         char *ref = lp_refuse_options(module_id);
794         const char *arg;
795         poptContext pc;
796
797         if (ref && *ref)
798                 set_refuse_options(ref);
799         if (am_daemon)
800                 set_refuse_options("log-file*");
801
802         /* TODO: Call poptReadDefaultConfig; handle errors. */
803
804         /* The context leaks in case of an error, but if there's a
805          * problem we always exit anyhow. */
806         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
807         poptReadDefaultConfig(pc, 0);
808
809         while ((opt = poptGetNextOpt(pc)) != -1) {
810                 /* most options are handled automatically by popt;
811                  * only special cases are returned and listed here. */
812
813                 switch (opt) {
814                 case OPT_VERSION:
815                         print_rsync_version(FINFO);
816                         exit_cleanup(0);
817
818                 case OPT_SERVER:
819                         if (!am_server) {
820                                 /* Disable popt aliases on the server side and
821                                  * then start parsing the options again. */
822                                 poptFreeContext(pc);
823                                 pc = poptGetContext(RSYNC_NAME, *argc, *argv,
824                                                     long_options, 0);
825                                 am_server = 1;
826                         }
827                         break;
828
829                 case OPT_SENDER:
830                         if (!am_server) {
831                                 usage(FERROR);
832                                 exit_cleanup(RERR_SYNTAX);
833                         }
834                         am_sender = 1;
835                         break;
836
837                 case OPT_DAEMON:
838                         if (am_daemon) {
839                                 strlcpy(err_buf,
840                                         "Attempt to hack rsync thwarted!\n",
841                                         sizeof err_buf);
842                                 return 0;
843                         }
844                         poptFreeContext(pc);
845                         pc = poptGetContext(RSYNC_NAME, *argc, *argv,
846                                             long_daemon_options, 0);
847                         while ((opt = poptGetNextOpt(pc)) != -1) {
848                                 switch (opt) {
849                                 case 'h':
850                                         daemon_usage(FINFO);
851                                         exit_cleanup(0);
852
853                                 case 'v':
854                                         verbose++;
855                                         break;
856
857                                 default:
858                                         rprintf(FERROR,
859                                             "rsync: %s: %s (in daemon mode)\n",
860                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
861                                             poptStrerror(opt));
862                                         goto daemon_error;
863                                 }
864                         }
865
866                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
867                                 snprintf(err_buf, sizeof err_buf,
868                                          "the --temp-dir path is WAY too long.\n");
869                                 return 0;
870                         }
871
872                         if (!daemon_opt) {
873                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
874                             daemon_error:
875                                 rprintf(FERROR,
876                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
877                                 exit_cleanup(RERR_SYNTAX);
878                         }
879
880                         *argv = poptGetArgs(pc);
881                         *argc = count_args(*argv);
882                         am_starting_up = 0;
883                         daemon_opt = 0;
884                         am_daemon = 1;
885                         return 1;
886
887                 case OPT_MODIFY_WINDOW:
888                         /* The value has already been set by popt, but
889                          * we need to remember that we're using a
890                          * non-default setting. */
891                         modify_window_set = 1;
892                         break;
893
894                 case OPT_FILTER:
895                         parse_rule(&filter_list, poptGetOptArg(pc), 0, 0);
896                         break;
897
898                 case OPT_EXCLUDE:
899                         parse_rule(&filter_list, poptGetOptArg(pc),
900                                    0, XFLG_OLD_PREFIXES);
901                         break;
902
903                 case OPT_INCLUDE:
904                         parse_rule(&filter_list, poptGetOptArg(pc),
905                                    MATCHFLG_INCLUDE, XFLG_OLD_PREFIXES);
906                         break;
907
908                 case OPT_EXCLUDE_FROM:
909                 case OPT_INCLUDE_FROM:
910                         arg = poptGetOptArg(pc);
911                         if (sanitize_paths)
912                                 arg = sanitize_path(NULL, arg, NULL, 0, NULL);
913                         if (server_filter_list.head) {
914                                 char *cp = strdup(arg);
915                                 if (!cp)
916                                         out_of_memory("parse_arguments");
917                                 if (!*cp)
918                                         goto options_rejected;
919                                 clean_fname(cp, 1);
920                                 if (check_filter(&server_filter_list, cp, 0) < 0)
921                                         goto options_rejected;
922                                 free(cp);
923                         }
924                         parse_filter_file(&filter_list, arg,
925                                 opt == OPT_INCLUDE_FROM ? MATCHFLG_INCLUDE : 0,
926                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
927                         break;
928
929                 case 'a':
930                         if (refused_archive_part) {
931                                 create_refuse_error(refused_archive_part);
932                                 return 0;
933                         }
934                         if (!recurse) /* preserve recurse == 2 */
935                                 recurse = 1;
936 #ifdef SUPPORT_LINKS
937                         preserve_links = 1;
938 #endif
939                         preserve_perms = 1;
940                         preserve_times = 1;
941                         preserve_gid = 1;
942                         preserve_uid = 1;
943                         preserve_devices = 1;
944                         preserve_specials = 1;
945                         break;
946
947                 case 'D':
948                         preserve_devices = preserve_specials = 1;
949                         break;
950
951                 case OPT_NO_D:
952                         preserve_devices = preserve_specials = 0;
953                         break;
954
955                 case 'h':
956                         human_readable++;
957                         break;
958
959                 case 'H':
960                         preserve_hard_links++;
961                         break;
962
963                 case 'i':
964                         itemize_changes++;
965                         break;
966
967                 case 'v':
968                         verbose++;
969                         break;
970
971                 case 'q':
972                         if (frommain)
973                                 quiet++;
974                         break;
975
976                 case 'x':
977                         one_file_system++;
978                         break;
979
980                 case 'F':
981                         switch (++F_option_cnt) {
982                         case 1:
983                                 parse_rule(&filter_list,": /.rsync-filter",0,0);
984                                 break;
985                         case 2:
986                                 parse_rule(&filter_list,"- .rsync-filter",0,0);
987                                 break;
988                         }
989                         break;
990
991                 case 'P':
992                         if (refused_partial || refused_progress) {
993                                 create_refuse_error(refused_partial
994                                     ? refused_partial : refused_progress);
995                                 return 0;
996                         }
997                         do_progress = 1;
998                         keep_partial = 1;
999                         break;
1000
1001                 case 'z':
1002                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1003                          || def_compress_level > Z_BEST_COMPRESSION) {
1004                                 snprintf(err_buf, sizeof err_buf,
1005                                         "--compress-level value is invalid: %d\n",
1006                                         def_compress_level);
1007                                 return 0;
1008                         }
1009                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1010                         if (do_compression && refused_compress) {
1011                                 create_refuse_error(refused_compress);
1012                                 return 0;
1013                         }
1014                         break;
1015
1016                 case OPT_WRITE_BATCH:
1017                         /* batch_name is already set */
1018                         write_batch = 1;
1019                         break;
1020
1021                 case OPT_ONLY_WRITE_BATCH:
1022                         /* batch_name is already set */
1023                         write_batch = -1;
1024                         break;
1025
1026                 case OPT_READ_BATCH:
1027                         /* batch_name is already set */
1028                         read_batch = 1;
1029                         break;
1030
1031                 case OPT_MAX_SIZE:
1032                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
1033                                 snprintf(err_buf, sizeof err_buf,
1034                                         "--max-size value is invalid: %s\n",
1035                                         max_size_arg);
1036                                 return 0;
1037                         }
1038                         break;
1039
1040                 case OPT_MIN_SIZE:
1041                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
1042                                 snprintf(err_buf, sizeof err_buf,
1043                                         "--min-size value is invalid: %s\n",
1044                                         min_size_arg);
1045                                 return 0;
1046                         }
1047                         break;
1048
1049                 case OPT_LINK_DEST:
1050 #ifdef SUPPORT_HARD_LINKS
1051                         link_dest = 1;
1052                         dest_option = "--link-dest";
1053                         goto set_dest_dir;
1054 #else
1055                         snprintf(err_buf, sizeof err_buf,
1056                                  "hard links are not supported on this %s\n",
1057                                  am_server ? "server" : "client");
1058                         return 0;
1059 #endif
1060
1061                 case OPT_COPY_DEST:
1062                         copy_dest = 1;
1063                         dest_option = "--copy-dest";
1064                         goto set_dest_dir;
1065
1066                 case OPT_COMPARE_DEST:
1067                         compare_dest = 1;
1068                         dest_option = "--compare-dest";
1069                 set_dest_dir:
1070                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1071                                 snprintf(err_buf, sizeof err_buf,
1072                                         "ERROR: at most %d %s args may be specified\n",
1073                                         MAX_BASIS_DIRS, dest_option);
1074                                 return 0;
1075                         }
1076                         /* We defer sanitizing this arg until we know what
1077                          * our destination directory is going to be. */
1078                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1079                         break;
1080
1081                 case OPT_CHMOD:
1082                         arg = poptGetOptArg(pc);
1083                         if (!parse_chmod(arg, &chmod_modes)) {
1084                                 snprintf(err_buf, sizeof err_buf,
1085                                     "Invalid argument passed to --chmod (%s)\n",
1086                                     arg);
1087                                 return 0;
1088                         }
1089                         break;
1090
1091                 case OPT_HELP:
1092                         usage(FINFO);
1093                         exit_cleanup(0);
1094
1095                 default:
1096                         /* A large opt value means that set_refuse_options()
1097                          * turned this option off. */
1098                         if (opt >= OPT_REFUSED_BASE) {
1099                                 create_refuse_error(opt);
1100                                 return 0;
1101                         }
1102                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1103                                  am_server ? "on remote machine: " : "",
1104                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1105                                  poptStrerror(opt));
1106                         return 0;
1107                 }
1108         }
1109
1110         if (human_readable && *argc == 2) {
1111                 /* Allow the old meaning of 'h' (--help) on its own. */
1112                 usage(FINFO);
1113                 exit_cleanup(0);
1114         }
1115
1116 #ifndef SUPPORT_LINKS
1117         if (preserve_links && !am_sender) {
1118                 snprintf(err_buf, sizeof err_buf,
1119                          "symlinks are not supported on this %s\n",
1120                          am_server ? "server" : "client");
1121                 return 0;
1122         }
1123 #endif
1124
1125 #ifndef SUPPORT_HARD_LINKS
1126         if (preserve_hard_links) {
1127                 snprintf(err_buf, sizeof err_buf,
1128                          "hard links are not supported on this %s\n",
1129                          am_server ? "server" : "client");
1130                 return 0;
1131         }
1132 #endif
1133
1134         if (write_batch && read_batch) {
1135                 snprintf(err_buf, sizeof err_buf,
1136                         "--write-batch and --read-batch can not be used together\n");
1137                 return 0;
1138         }
1139         if (write_batch > 0 || read_batch) {
1140                 if (am_server) {
1141                         rprintf(FINFO,
1142                                 "ignoring --%s-batch option sent to server\n",
1143                                 write_batch ? "write" : "read");
1144                         /* We don't actually exit_cleanup(), so that we can
1145                          * still service older version clients that still send
1146                          * batch args to server. */
1147                         read_batch = write_batch = 0;
1148                         batch_name = NULL;
1149                 } else if (dry_run)
1150                         write_batch = 0;
1151         }
1152         if (read_batch && files_from) {
1153                 snprintf(err_buf, sizeof err_buf,
1154                         "--read-batch cannot be used with --files-from\n");
1155                 return 0;
1156         }
1157         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1158                 snprintf(err_buf, sizeof err_buf,
1159                         "the batch-file name must be %d characters or less.\n",
1160                         MAX_BATCH_NAME_LEN);
1161                 return 0;
1162         }
1163
1164         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1165                 snprintf(err_buf, sizeof err_buf,
1166                          "the --temp-dir path is WAY too long.\n");
1167                 return 0;
1168         }
1169
1170         if (compare_dest + copy_dest + link_dest > 1) {
1171                 snprintf(err_buf, sizeof err_buf,
1172                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1173                 return 0;
1174         }
1175
1176         if (files_from) {
1177                 if (recurse == 1) /* preserve recurse == 2 */
1178                         recurse = 0;
1179                 if (xfer_dirs < 0)
1180                         xfer_dirs = 1;
1181         }
1182
1183         if (xfer_dirs < 1)
1184                 xfer_dirs = recurse || list_only;
1185
1186         if (relative_paths < 0)
1187                 relative_paths = files_from? 1 : 0;
1188         if (!relative_paths)
1189                 implied_dirs = 0;
1190
1191         if (delete_before + !!delete_during + delete_after > 1) {
1192                 snprintf(err_buf, sizeof err_buf,
1193                         "You may not combine multiple --delete-WHEN options.\n");
1194                 return 0;
1195         }
1196         if (delete_before || delete_during || delete_after)
1197                 delete_mode = 1;
1198         else if (delete_mode || delete_excluded) {
1199                 /* Only choose now between before & during if one is refused. */
1200                 if (refused_delete_before) {
1201                         if (!refused_delete_during)
1202                                 delete_during = 1;
1203                         else {
1204                                 create_refuse_error(refused_delete_before);
1205                                 return 0;
1206                         }
1207                 } else if (refused_delete_during)
1208                         delete_before = 1;
1209                 delete_mode = 1;
1210         }
1211         if (!xfer_dirs && delete_mode) {
1212                 snprintf(err_buf, sizeof err_buf,
1213                         "--delete does not work without -r or -d.\n");
1214                 return 0;
1215         }
1216
1217         if (delete_mode && refused_delete) {
1218                 create_refuse_error(refused_delete);
1219                 return 0;
1220         }
1221
1222         if (remove_source_files) {
1223                 /* We only want to infer this refusal of --remove-source-files
1224                  * via the refusal of "delete", not any of the "delete-FOO"
1225                  * options. */
1226                 if (refused_delete && am_sender) {
1227                         create_refuse_error(refused_delete);
1228                         return 0;
1229                 }
1230                 need_messages_from_generator = 1;
1231         }
1232
1233         *argv = poptGetArgs(pc);
1234         *argc = count_args(*argv);
1235
1236         if (sanitize_paths) {
1237                 int i;
1238                 for (i = *argc; i-- > 0; )
1239                         (*argv)[i] = sanitize_path(NULL, (*argv)[i], "", 0, NULL);
1240                 if (tmpdir)
1241                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, NULL);
1242                 if (backup_dir)
1243                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, NULL);
1244         }
1245         if (server_filter_list.head && !am_sender) {
1246                 struct filter_list_struct *elp = &server_filter_list;
1247                 if (tmpdir) {
1248                         if (!*tmpdir)
1249                                 goto options_rejected;
1250                         clean_fname(tmpdir, 1);
1251                         if (check_filter(elp, tmpdir, 1) < 0)
1252                                 goto options_rejected;
1253                 }
1254                 if (backup_dir) {
1255                         if (!*backup_dir)
1256                                 goto options_rejected;
1257                         clean_fname(backup_dir, 1);
1258                         if (check_filter(elp, backup_dir, 1) < 0)
1259                                 goto options_rejected;
1260                 }
1261         }
1262
1263         if (!backup_suffix)
1264                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
1265         backup_suffix_len = strlen(backup_suffix);
1266         if (strchr(backup_suffix, '/') != NULL) {
1267                 snprintf(err_buf, sizeof err_buf,
1268                         "--suffix cannot contain slashes: %s\n",
1269                         backup_suffix);
1270                 return 0;
1271         }
1272         if (backup_dir) {
1273                 backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
1274                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
1275                 if (backup_dir_remainder < 32) {
1276                         snprintf(err_buf, sizeof err_buf,
1277                                 "the --backup-dir path is WAY too long.\n");
1278                         return 0;
1279                 }
1280                 if (backup_dir_buf[backup_dir_len - 1] != '/') {
1281                         backup_dir_buf[backup_dir_len++] = '/';
1282                         backup_dir_buf[backup_dir_len] = '\0';
1283                 }
1284                 if (verbose > 1 && !am_sender)
1285                         rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
1286         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
1287                 snprintf(err_buf, sizeof err_buf,
1288                         "--suffix cannot be a null string without --backup-dir\n");
1289                 return 0;
1290         } else if (make_backups && delete_mode && !delete_excluded) {
1291                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
1292                         "Pp *%s", backup_suffix);
1293                 parse_rule(&filter_list, backup_dir_buf, 0, 0);
1294         }
1295         if (make_backups && !backup_dir)
1296                 omit_dir_times = 1;
1297
1298         if (stdout_format) {
1299                 if (am_server && log_format_has(stdout_format, 'I'))
1300                         stdout_format_has_i = 2;
1301                 else if (log_format_has(stdout_format, 'i'))
1302                         stdout_format_has_i = itemize_changes | 1;
1303                 if (!log_format_has(stdout_format, 'b')
1304                  && !log_format_has(stdout_format, 'c'))
1305                         log_before_transfer = !am_server;
1306         } else if (itemize_changes) {
1307                 stdout_format = "%i %n%L";
1308                 stdout_format_has_i = itemize_changes;
1309                 log_before_transfer = !am_server;
1310         }
1311
1312         if (do_progress && !verbose && !log_before_transfer && !am_server)
1313                 verbose = 1;
1314
1315         if (dry_run)
1316                 do_xfers = 0;
1317
1318         set_io_timeout(io_timeout);
1319
1320         if (verbose && !stdout_format) {
1321                 stdout_format = "%n%L";
1322                 log_before_transfer = !am_server;
1323         }
1324         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
1325                 stdout_format_has_o_or_i = 1;
1326
1327         if (logfile_name && !am_daemon) {
1328                 if (!logfile_format) {
1329                         logfile_format = "%i %n%L";
1330                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
1331                 } else {
1332                         if (log_format_has(logfile_format, 'i'))
1333                                 logfile_format_has_i = 1;
1334                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
1335                                 logfile_format_has_o_or_i = 1;
1336                 }
1337                 log_init(0);
1338         } else if (!am_daemon)
1339                 logfile_format = NULL;
1340
1341         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
1342                 bwlimit = daemon_bwlimit;
1343         if (bwlimit) {
1344                 bwlimit_writemax = (size_t)bwlimit * 128;
1345                 if (bwlimit_writemax < 512)
1346                         bwlimit_writemax = 512;
1347         }
1348
1349         if (sparse_files && inplace) {
1350                 /* Note: we don't check for this below, because --append is
1351                  * OK with --sparse (as long as redos are handled right). */
1352                 snprintf(err_buf, sizeof err_buf,
1353                          "--sparse cannot be used with --inplace\n");
1354                 return 0;
1355         }
1356
1357         if (append_mode) {
1358                 if (whole_file > 0) {
1359                         snprintf(err_buf, sizeof err_buf,
1360                                  "--append cannot be used with --whole-file\n");
1361                         return 0;
1362                 }
1363                 if (refused_inplace) {
1364                         create_refuse_error(refused_inplace);
1365                         return 0;
1366                 }
1367                 inplace = 1;
1368         }
1369
1370         if (delay_updates && !partial_dir)
1371                 partial_dir = tmp_partialdir;
1372
1373         if (inplace) {
1374 #ifdef HAVE_FTRUNCATE
1375                 if (partial_dir) {
1376                         snprintf(err_buf, sizeof err_buf,
1377                                  "--%s cannot be used with --%s\n",
1378                                  append_mode ? "append" : "inplace",
1379                                  delay_updates ? "delay-updates" : "partial-dir");
1380                         return 0;
1381                 }
1382                 /* --inplace implies --partial for refusal purposes, but we
1383                  * clear the keep_partial flag for internal logic purposes. */
1384                 if (refused_partial) {
1385                         create_refuse_error(refused_partial);
1386                         return 0;
1387                 }
1388                 keep_partial = 0;
1389 #else
1390                 snprintf(err_buf, sizeof err_buf,
1391                          "--%s is not supported on this %s\n",
1392                          append_mode ? "append" : "inplace",
1393                          am_server ? "server" : "client");
1394                 return 0;
1395 #endif
1396         } else {
1397                 if (keep_partial && !partial_dir && !am_server) {
1398                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
1399                                 partial_dir = strdup(arg);
1400                 }
1401                 if (partial_dir) {
1402                         if (*partial_dir)
1403                                 clean_fname(partial_dir, 1);
1404                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
1405                                 partial_dir = NULL;
1406                         else if (*partial_dir != '/' && !am_server) {
1407                                 parse_rule(&filter_list, partial_dir,
1408                                     MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY
1409                                     | MATCHFLG_PERISHABLE, 0);
1410                         }
1411                         if (!partial_dir && refused_partial) {
1412                                 create_refuse_error(refused_partial);
1413                                 return 0;
1414                         }
1415                         keep_partial = 1;
1416                 }
1417         }
1418
1419         if (files_from) {
1420                 char *h, *p;
1421                 int q;
1422                 if (*argc > 2 || (!am_daemon && *argc == 1)) {
1423                         usage(FERROR);
1424                         exit_cleanup(RERR_SYNTAX);
1425                 }
1426                 if (strcmp(files_from, "-") == 0) {
1427                         filesfrom_fd = 0;
1428                         if (am_server)
1429                                 filesfrom_host = ""; /* reading from socket */
1430                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
1431                         if (am_server) {
1432                                 snprintf(err_buf, sizeof err_buf,
1433                                         "The --files-from sent to the server cannot specify a host.\n");
1434                                 return 0;
1435                         }
1436                         files_from = p;
1437                         filesfrom_host = h;
1438                         if (strcmp(files_from, "-") == 0) {
1439                                 snprintf(err_buf, sizeof err_buf,
1440                                         "Invalid --files-from remote filename\n");
1441                                 return 0;
1442                         }
1443                 } else {
1444                         if (sanitize_paths)
1445                                 files_from = sanitize_path(NULL, files_from, NULL, 0, NULL);
1446                         if (server_filter_list.head) {
1447                                 if (!*files_from)
1448                                         goto options_rejected;
1449                                 clean_fname(files_from, 1);
1450                                 if (check_filter(&server_filter_list, files_from, 0) < 0)
1451                                         goto options_rejected;
1452                         }
1453                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
1454                         if (filesfrom_fd < 0) {
1455                                 snprintf(err_buf, sizeof err_buf,
1456                                         "failed to open files-from file %s: %s\n",
1457                                         files_from, strerror(errno));
1458                                 return 0;
1459                         }
1460                 }
1461         }
1462
1463         am_starting_up = 0;
1464
1465         return 1;
1466
1467   options_rejected:
1468         snprintf(err_buf, sizeof err_buf,
1469                 "Your options have been rejected by the server.\n");
1470         return 0;
1471 }
1472
1473
1474 /**
1475  * Construct a filtered list of options to pass through from the
1476  * client to the server.
1477  *
1478  * This involves setting options that will tell the server how to
1479  * behave, and also filtering out options that are processed only
1480  * locally.
1481  **/
1482 void server_options(char **args,int *argc)
1483 {
1484         static char argstr[64];
1485         int ac = *argc;
1486         char *arg;
1487
1488         int i, x;
1489
1490         if (blocking_io == -1)
1491                 blocking_io = 0;
1492
1493         /* This should always remain first on the server's command-line. */
1494         args[ac++] = "--server";
1495
1496         if (daemon_over_rsh) {
1497                 args[ac++] = "--daemon";
1498                 *argc = ac;
1499                 /* if we're passing --daemon, we're done */
1500                 return;
1501         }
1502
1503         if (!am_sender)
1504                 args[ac++] = "--sender";
1505
1506         x = 1;
1507         argstr[0] = '-';
1508         for (i = 0; i < verbose; i++)
1509                 argstr[x++] = 'v';
1510
1511         /* the -q option is intentionally left out */
1512         if (make_backups)
1513                 argstr[x++] = 'b';
1514         if (update_only)
1515                 argstr[x++] = 'u';
1516         if (!do_xfers) /* Note: NOT "dry_run"! */
1517                 argstr[x++] = 'n';
1518         if (preserve_links)
1519                 argstr[x++] = 'l';
1520         if (xfer_dirs > (recurse || !delete_mode || !am_sender ? 1 : 0))
1521                 argstr[x++] = 'd';
1522         if (am_sender) {
1523                 if (keep_dirlinks)
1524                         argstr[x++] = 'K';
1525                 if (prune_empty_dirs)
1526                         argstr[x++] = 'm';
1527                 if (omit_dir_times == 2)
1528                         argstr[x++] = 'O';
1529         } else {
1530                 if (copy_links)
1531                         argstr[x++] = 'L';
1532                 if (copy_dirlinks)
1533                         argstr[x++] = 'k';
1534         }
1535
1536         if (whole_file > 0)
1537                 argstr[x++] = 'W';
1538         /* We don't need to send --no-whole-file, because it's the
1539          * default for remote transfers, and in any case old versions
1540          * of rsync will not understand it. */
1541
1542         if (preserve_hard_links) {
1543                 argstr[x++] = 'H';
1544                 if (preserve_hard_links > 1)
1545                         argstr[x++] = 'H';
1546         }
1547         if (preserve_uid)
1548                 argstr[x++] = 'o';
1549         if (preserve_gid)
1550                 argstr[x++] = 'g';
1551         if (preserve_devices) /* ignore preserve_specials here */
1552                 argstr[x++] = 'D';
1553         if (preserve_times)
1554                 argstr[x++] = 't';
1555         if (preserve_perms)
1556                 argstr[x++] = 'p';
1557         else if (preserve_executability && am_sender)
1558                 argstr[x++] = 'E';
1559         if (recurse)
1560                 argstr[x++] = 'r';
1561         if (always_checksum)
1562                 argstr[x++] = 'c';
1563         if (cvs_exclude)
1564                 argstr[x++] = 'C';
1565         if (ignore_times)
1566                 argstr[x++] = 'I';
1567         if (relative_paths)
1568                 argstr[x++] = 'R';
1569         if (one_file_system) {
1570                 argstr[x++] = 'x';
1571                 if (one_file_system > 1)
1572                         argstr[x++] = 'x';
1573         }
1574         if (sparse_files)
1575                 argstr[x++] = 'S';
1576         if (do_compression)
1577                 argstr[x++] = 'z';
1578
1579         /* This is a complete hack - blame Rusty.  FIXME!
1580          * This hack is only needed for older rsync versions that
1581          * don't understand the --list-only option. */
1582         if (list_only == 1 && !recurse)
1583                 argstr[x++] = 'r';
1584
1585         argstr[x] = '\0';
1586
1587         if (x != 1)
1588                 args[ac++] = argstr;
1589
1590         if (list_only > 1)
1591                 args[ac++] = "--list-only";
1592
1593         /* This makes sure that the remote rsync can handle deleting with -d
1594          * sans -r because the --no-r option was added at the same time. */
1595         if (xfer_dirs && !recurse && delete_mode && am_sender)
1596                 args[ac++] = "--no-r";
1597
1598         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
1599                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
1600                         goto oom;
1601                 args[ac++] = arg;
1602         }
1603
1604         if (preserve_devices) {
1605                 /* Note: sending "--devices" would not be backward-compatible. */
1606                 if (!preserve_specials)
1607                         args[ac++] = "--no-specials"; /* -D is already set. */
1608         } else if (preserve_specials)
1609                 args[ac++] = "--specials";
1610
1611         /* The server side doesn't use our log-format, but in certain
1612          * circumstances they need to know a little about the option. */
1613         if (stdout_format && am_sender) {
1614                 /* Use --log-format, not --out-format, for compatibility. */
1615                 if (stdout_format_has_i > 1)
1616                         args[ac++] = "--log-format=%i%I";
1617                 else if (stdout_format_has_i)
1618                         args[ac++] = "--log-format=%i";
1619                 else if (stdout_format_has_o_or_i)
1620                         args[ac++] = "--log-format=%o";
1621                 else if (!verbose)
1622                         args[ac++] = "--log-format=X";
1623         }
1624
1625         if (block_size) {
1626                 if (asprintf(&arg, "-B%lu", block_size) < 0)
1627                         goto oom;
1628                 args[ac++] = arg;
1629         }
1630
1631         if (max_delete >= 0 && am_sender) {
1632                 if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
1633                         goto oom;
1634                 args[ac++] = arg;
1635         }
1636
1637         if (min_size && am_sender) {
1638                 args[ac++] = "--min-size";
1639                 args[ac++] = min_size_arg;
1640         }
1641
1642         if (max_size && am_sender) {
1643                 args[ac++] = "--max-size";
1644                 args[ac++] = max_size_arg;
1645         }
1646
1647         if (io_timeout) {
1648                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
1649                         goto oom;
1650                 args[ac++] = arg;
1651         }
1652
1653         if (bwlimit) {
1654                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
1655                         goto oom;
1656                 args[ac++] = arg;
1657         }
1658
1659         if (backup_dir) {
1660                 args[ac++] = "--backup-dir";
1661                 args[ac++] = backup_dir;
1662         }
1663
1664         /* Only send --suffix if it specifies a non-default value. */
1665         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
1666                 /* We use the following syntax to avoid weirdness with '~'. */
1667                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
1668                         goto oom;
1669                 args[ac++] = arg;
1670         }
1671
1672         if (am_sender) {
1673                 if (delete_before)
1674                         args[ac++] = "--delete-before";
1675                 else if (delete_during == 2)
1676                         args[ac++] = "--delete-delay";
1677                 else if (delete_during)
1678                         args[ac++] = "--delete-during";
1679                 else if (delete_after)
1680                         args[ac++] = "--delete-after";
1681                 else if (delete_mode && !delete_excluded)
1682                         args[ac++] = "--delete";
1683                 if (delete_excluded)
1684                         args[ac++] = "--delete-excluded";
1685                 if (force_delete)
1686                         args[ac++] = "--force";
1687                 if (write_batch < 0)
1688                         args[ac++] = "--only-write-batch=X";
1689                 if (am_root > 1)
1690                         args[ac++] = "--super";
1691                 if (size_only)
1692                         args[ac++] = "--size-only";
1693         }
1694
1695         if (modify_window_set) {
1696                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
1697                         goto oom;
1698                 args[ac++] = arg;
1699         }
1700
1701         if (checksum_seed) {
1702                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
1703                         goto oom;
1704                 args[ac++] = arg;
1705         }
1706
1707         if (partial_dir && am_sender) {
1708                 if (partial_dir != tmp_partialdir) {
1709                         args[ac++] = "--partial-dir";
1710                         args[ac++] = partial_dir;
1711                 }
1712                 if (delay_updates)
1713                         args[ac++] = "--delay-updates";
1714         } else if (keep_partial && am_sender)
1715                 args[ac++] = "--partial";
1716
1717         if (ignore_errors)
1718                 args[ac++] = "--ignore-errors";
1719
1720         if (copy_unsafe_links)
1721                 args[ac++] = "--copy-unsafe-links";
1722
1723         if (safe_symlinks)
1724                 args[ac++] = "--safe-links";
1725
1726         if (numeric_ids)
1727                 args[ac++] = "--numeric-ids";
1728
1729         if (ignore_existing && am_sender)
1730                 args[ac++] = "--ignore-existing";
1731
1732         /* Backward compatibility: send --existing, not --ignore-non-existing. */
1733         if (ignore_non_existing && am_sender)
1734                 args[ac++] = "--existing";
1735
1736         if (append_mode)
1737                 args[ac++] = "--append";
1738         else if (inplace)
1739                 args[ac++] = "--inplace";
1740
1741         if (tmpdir && am_sender) {
1742                 args[ac++] = "--temp-dir";
1743                 args[ac++] = tmpdir;
1744         }
1745
1746         if (basis_dir[0] && am_sender) {
1747                 /* the server only needs this option if it is not the sender,
1748                  *   and it may be an older version that doesn't know this
1749                  *   option, so don't send it if client is the sender.
1750                  */
1751                 int i;
1752                 for (i = 0; i < basis_dir_cnt; i++) {
1753                         args[ac++] = dest_option;
1754                         args[ac++] = basis_dir[i];
1755                 }
1756         }
1757
1758         if (files_from && (!am_sender || filesfrom_host)) {
1759                 if (filesfrom_host) {
1760                         args[ac++] = "--files-from";
1761                         args[ac++] = files_from;
1762                         if (eol_nulls)
1763                                 args[ac++] = "--from0";
1764                 } else {
1765                         args[ac++] = "--files-from=-";
1766                         args[ac++] = "--from0";
1767                 }
1768                 if (!relative_paths)
1769                         args[ac++] = "--no-relative";
1770         }
1771         if (relative_paths && !implied_dirs && !am_sender)
1772                 args[ac++] = "--no-implied-dirs";
1773
1774         if (fuzzy_basis && am_sender)
1775                 args[ac++] = "--fuzzy";
1776
1777         if (remove_source_files == 1)
1778                 args[ac++] = "--remove-source-files";
1779         else if (remove_source_files)
1780                 args[ac++] = "--remove-sent-files";
1781
1782         *argc = ac;
1783         return;
1784
1785     oom:
1786         out_of_memory("server_options");
1787 }
1788
1789 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
1790  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
1791  * memory with the HOST.  If a daemon-accessing spec was specified, the value
1792  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
1793  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
1794  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
1795  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
1796 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
1797 {
1798         char *p;
1799         int not_host;
1800         int hostlen;
1801
1802         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
1803                 char *path;
1804                 s += strlen(URL_PREFIX);
1805                 if ((p = strchr(s, '/')) != NULL) {
1806                         hostlen = p - s;
1807                         path = p + 1;
1808                 } else {
1809                         hostlen = strlen(s);
1810                         path = "";
1811                 }
1812                 if (*s == '[' && (p = strchr(s, ']')) != NULL) {
1813                         s++;
1814                         hostlen = p - s;
1815                         if (p[1] == ':')
1816                                 *port_ptr = atoi(p+2);
1817                 } else {
1818                         if ((p = strchr(s, ':')) != NULL) {
1819                                 hostlen = p - s;
1820                                 *port_ptr = atoi(p+1);
1821                         }
1822                 }
1823                 if (!*port_ptr)
1824                         *port_ptr = RSYNC_PORT;
1825                 *host_ptr = new_array(char, hostlen + 1);
1826                 strlcpy(*host_ptr, s, hostlen + 1);
1827                 return path;
1828         }
1829
1830         if (*s == '[' && (p = strchr(s, ']')) != NULL && p[1] == ':') {
1831                 s++;
1832                 hostlen = p - s;
1833                 *p = '\0';
1834                 not_host = strchr(s, '/') || !strchr(s, ':');
1835                 *p = ']';
1836                 if (not_host)
1837                         return NULL;
1838                 p++;
1839         } else {
1840                 if (!(p = strchr(s, ':')))
1841                         return NULL;
1842                 hostlen = p - s;
1843                 *p = '\0';
1844                 not_host = strchr(s, '/') != NULL;
1845                 *p = ':';
1846                 if (not_host)
1847                         return NULL;
1848         }
1849
1850         *host_ptr = new_array(char, hostlen + 1);
1851         strlcpy(*host_ptr, s, hostlen + 1);
1852
1853         if (p[1] == ':') {
1854                 if (port_ptr && !*port_ptr)
1855                         *port_ptr = RSYNC_PORT;
1856                 return p + 2;
1857         }
1858         if (port_ptr)
1859                 *port_ptr = 0;
1860
1861         return p + 1;
1862 }