Some platforms may have getaddrinfo() but not sockaddr_storage.
[rsync.git] / options.c
1 /*  -*- c-file-style: "linux" -*-
2     
3     Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
4     Copyright (C) 2000-2001 by Martin Pool <mbp@samba.org>
5    
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 2 of the License, or
9    (at your option) any later version.
10    
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15    
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include "rsync.h"
22 #include "popt.h"
23
24 int make_backups = 0;
25 int whole_file = 0;
26 int copy_links = 0;
27 int preserve_links = 0;
28 int preserve_hard_links = 0;
29 int preserve_perms = 0;
30 int preserve_devices = 0;
31 int preserve_uid = 0;
32 int preserve_gid = 0;
33 int preserve_times = 0;
34 int update_only = 0;
35 int cvs_exclude = 0;
36 int dry_run=0;
37 int local_server=0;
38 int ignore_times=0;
39 int delete_mode=0;
40 int delete_excluded=0;
41 int one_file_system=0;
42 int remote_version=0;
43 int sparse_files=0;
44 int do_compression=0;
45 int am_root=0;
46 int orig_umask=0;
47 int relative_paths=0;
48 int numeric_ids = 0;
49 int force_delete = 0;
50 int io_timeout = 0;
51 int io_error = 0;
52 int read_only = 0;
53 int module_id = -1;
54 int am_server = 0;
55 int am_sender = 0;
56 int recurse = 0;
57 int am_daemon=0;
58 int do_stats=0;
59 int do_progress=0;
60 int keep_partial=0;
61 int safe_symlinks=0;
62 int copy_unsafe_links=0;
63 int block_size=BLOCK_SIZE;
64 int size_only=0;
65 int bwlimit=0;
66 int delete_after=0;
67 int only_existing=0;
68 int max_delete=0;
69 int ignore_errors=0;
70 #ifdef _WIN32
71 int modify_window=2;
72 #else
73 int modify_window=0;
74 #endif
75 int blocking_io=0;
76
77 /** Global options set from command line. **/
78 struct global_opts global_opts;
79
80 int read_batch=0;  /* dw */
81 int write_batch=0; /* dw */
82
83 char *backup_suffix = BACKUP_SUFFIX;
84 char *tmpdir = NULL;
85 char *compare_dest = NULL;
86 char *config_file = RSYNCD_CONF;
87 char *shell_cmd = NULL;
88 char *log_format = NULL;
89 char *password_file = NULL;
90 char *rsync_path = RSYNC_PATH;
91 char *backup_dir = NULL;
92 int rsync_port = RSYNC_PORT;
93
94 int verbose = 0;
95 int quiet = 0;
96 int always_checksum = 0;
97 int list_only = 0;
98
99 char *batch_ext = NULL;
100
101 static int modify_window_set;
102
103 /** Local address to bind.  As a character string because it's
104  * interpreted by the IPv6 layer: should be a numeric IP4 or ip6
105  * address, or a hostname. **/
106 char *bind_address;
107
108
109 static void print_rsync_version(int f)
110 {
111         char const *got_socketpair = "no ";
112         char const *hardlinks = "no ";
113         char const *links = "no ";
114         char const *ipv6 = "no ";
115
116 #ifdef HAVE_SOCKETPAIR
117         got_socketpair = "";
118 #endif
119
120 #if SUPPORT_HARD_LINKS
121         hardlinks = "";
122 #endif
123
124 #if SUPPORT_LINKS
125         links = "";
126 #endif
127
128 #if INET6
129         ipv6 = "";
130 #endif       
131
132         rprintf(f, "%s  version %s  protocol version %d\n",
133                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION);
134         rprintf(f,
135                 "Copyright (C) 1996-2001 by Andrew Tridgell and others\n");
136         rprintf(f, "<http://rsync.samba.org/>\n");
137         rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, "
138                 "%shard links, %ssymlinks, batchfiles, %sIPv6\n\n",
139                 (int) (sizeof(OFF_T) * 8),
140                 got_socketpair, hardlinks, links, ipv6);
141
142 #ifdef NO_INT64
143         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
144 #endif
145 }
146
147
148 void usage(enum logcode F)
149 {
150   print_rsync_version(F);
151
152   rprintf(F,"rsync is a file transfer program capable of efficient remote update\nvia a fast differencing algorithm.\n\n");
153
154   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
155   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC DEST\n");
156   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... DEST\n");
157   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
158   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
159   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
160   rprintf(F,"SRC on single-colon remote HOST will be expanded by remote shell\n");
161   rprintf(F,"SRC on server remote HOST may contain shell wildcards or multiple\n");
162   rprintf(F,"  sources separated by space as long as they have same top-level\n");
163   rprintf(F,"\nOptions\n");
164   rprintf(F," -v, --verbose               increase verbosity\n");
165   rprintf(F," -q, --quiet                 decrease verbosity\n");
166   rprintf(F," -c, --checksum              always checksum\n");
167   rprintf(F," -a, --archive               archive mode\n");
168   rprintf(F," -r, --recursive             recurse into directories\n");
169   rprintf(F," -R, --relative              use relative path names\n");
170   rprintf(F," -b, --backup                make backups (default %s suffix)\n",BACKUP_SUFFIX);
171   rprintf(F,"     --backup-dir            make backups into this directory\n");
172   rprintf(F,"     --suffix=SUFFIX         override backup suffix\n");  
173   rprintf(F," -u, --update                update only (don't overwrite newer files)\n");
174   rprintf(F," -l, --links                 preserve soft links\n");
175   rprintf(F," -L, --copy-links            treat soft links like regular files\n");
176   rprintf(F,"     --copy-unsafe-links     copy links outside the source tree\n");
177   rprintf(F,"     --safe-links            ignore links outside the destination tree\n");
178   rprintf(F," -H, --hard-links            preserve hard links\n");
179   rprintf(F," -p, --perms                 preserve permissions\n");
180   rprintf(F," -o, --owner                 preserve owner (root only)\n");
181   rprintf(F," -g, --group                 preserve group\n");
182   rprintf(F," -D, --devices               preserve devices (root only)\n");
183   rprintf(F," -t, --times                 preserve times\n");  
184   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
185   rprintf(F," -n, --dry-run               show what would have been transferred\n");
186   rprintf(F," -W, --whole-file            copy whole files, no incremental checks\n");
187   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
188   rprintf(F," -B, --block-size=SIZE       checksum blocking size (default %d)\n",BLOCK_SIZE);  
189   rprintf(F," -e, --rsh=COMMAND           specify rsh replacement\n");
190   rprintf(F,"     --rsync-path=PATH       specify path to rsync on the remote machine\n");
191   rprintf(F," -C, --cvs-exclude           auto ignore files in the same way CVS does\n");
192   rprintf(F,"     --existing              only update files that already exist\n");
193   rprintf(F,"     --delete                delete files that don't exist on the sending side\n");
194   rprintf(F,"     --delete-excluded       also delete excluded files on the receiving side\n");
195   rprintf(F,"     --delete-after          delete after transferring, not before\n");
196   rprintf(F,"     --ignore-errors         delete even if there are IO errors\n");
197   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
198   rprintf(F,"     --partial               keep partially transferred files\n");
199   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
200   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
201   rprintf(F,"     --timeout=TIME          set IO timeout in seconds\n");
202   rprintf(F," -I, --ignore-times          don't exclude files that match length and time\n");
203   rprintf(F,"     --size-only             only use file size when determining if a file should be transferred\n");
204   rprintf(F,"     --modify-window=NUM     Timestamp window (seconds) for file match (default=%d)\n",modify_window);
205   rprintf(F," -T  --temp-dir=DIR          create temporary files in directory DIR\n");
206   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
207   rprintf(F," -P                          equivalent to --partial --progress\n");
208   rprintf(F," -z, --compress              compress file data\n");
209   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
210   rprintf(F,"     --exclude-from=FILE     exclude patterns listed in FILE\n");
211   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
212   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
213   rprintf(F,"     --version               print version number\n");  
214   rprintf(F,"     --daemon                run as a rsync daemon\n");  
215   rprintf(F,"     --no-detach             do not detach from the parent\n");  
216   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");  
217   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");  
218   rprintf(F,"     --port=PORT             specify alternate rsyncd port number\n");
219   rprintf(F,"     --blocking-io           use blocking IO for the remote shell\n");  
220   rprintf(F,"     --stats                 give some file transfer stats\n");  
221   rprintf(F,"     --progress              show progress during transfer\n");  
222   rprintf(F,"     --log-format=FORMAT     log file transfers using specified format\n");  
223   rprintf(F,"     --password-file=FILE    get password from FILE\n");
224   rprintf(F,"     --bwlimit=KBPS          limit I/O bandwidth, KBytes per second\n");
225   rprintf(F," -f  --read-batch=EXT        read batch file\n");
226   rprintf(F," -F  --write-batch           write batch file\n");
227   rprintf(F," -h, --help                  show this help screen\n");
228 #ifdef INET6
229   rprintf(F," -4                          prefer IPv4\n");
230   rprintf(F," -6                          prefer IPv6\n");
231 #endif
232
233   rprintf(F,"\n");
234
235   rprintf(F,"\nPlease see the rsync(1) and rsyncd.conf(5) man pages for full documentation\n");
236   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
237 }
238
239 enum {OPT_VERSION = 1000, OPT_SUFFIX, OPT_SENDER, OPT_SERVER, OPT_EXCLUDE,
240       OPT_EXCLUDE_FROM, OPT_DELETE, OPT_DELETE_EXCLUDED, OPT_NUMERIC_IDS,
241       OPT_RSYNC_PATH, OPT_FORCE, OPT_TIMEOUT, OPT_DAEMON, OPT_CONFIG, OPT_PORT,
242       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_STATS, OPT_PARTIAL, OPT_PROGRESS,
243       OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST,
244       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
245       OPT_DELETE_AFTER, OPT_EXISTING, OPT_MAX_DELETE, OPT_BACKUP_DIR, 
246       OPT_IGNORE_ERRORS, OPT_BWLIMIT, OPT_BLOCKING_IO,
247       OPT_MODIFY_WINDOW};
248
249 static struct poptOption long_options[] = {
250   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
251   {"version",          0,  POPT_ARG_NONE,   0,             OPT_VERSION},
252   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix},
253   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path},
254   {"password-file",    0,  POPT_ARG_STRING, &password_file},
255   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times},
256   {"size-only",        0,  POPT_ARG_NONE,   &size_only},
257   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW},
258   {"one-file-system", 'x', POPT_ARG_NONE,   &one_file_system},
259   {"delete",           0,  POPT_ARG_NONE,   &delete_mode},
260   {"existing",         0,  POPT_ARG_NONE,   &only_existing},
261   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after},
262   {"delete-excluded",  0,  POPT_ARG_NONE,   0,              OPT_DELETE_EXCLUDED},
263   {"force",            0,  POPT_ARG_NONE,   &force_delete},
264   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids},
265   {"exclude",          0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE},
266   {"include",          0,  POPT_ARG_STRING, 0,              OPT_INCLUDE},
267   {"exclude-from",     0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE_FROM},
268   {"include-from",     0,  POPT_ARG_STRING, 0,              OPT_INCLUDE_FROM},
269   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks},
270   {"help",            'h', POPT_ARG_NONE,   0,              'h'},
271   {"backup",          'b', POPT_ARG_NONE,   &make_backups},
272   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run},
273   {"sparse",          'S', POPT_ARG_NONE,   &sparse_files},
274   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude},
275   {"update",          'u', POPT_ARG_NONE,   &update_only},
276   {"links",           'l', POPT_ARG_NONE,   &preserve_links},
277   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links},
278   {"whole",           'W', POPT_ARG_NONE,   &whole_file},
279   {"copy-unsafe-links", 0, POPT_ARG_NONE,   &copy_unsafe_links},
280   {"perms",           'p', POPT_ARG_NONE,   &preserve_perms},
281   {"owner",           'o', POPT_ARG_NONE,   &preserve_uid},
282   {"group",           'g', POPT_ARG_NONE,   &preserve_gid},
283   {"devices",         'D', POPT_ARG_NONE,   &preserve_devices},
284   {"times",           't', POPT_ARG_NONE,   &preserve_times},
285   {"checksum",        'c', POPT_ARG_NONE,   &always_checksum},
286   {"verbose",         'v', POPT_ARG_NONE,   0,               'v'},
287   {"quiet",           'q', POPT_ARG_NONE,   0,               'q'},
288   {"archive",         'a', POPT_ARG_NONE,   0,               'a'}, 
289   {"server",           0,  POPT_ARG_NONE,   &am_server},
290   {"sender",           0,  POPT_ARG_NONE,   0,               OPT_SENDER},
291   {"recursive",       'r', POPT_ARG_NONE,   &recurse},
292   {"relative",        'R', POPT_ARG_NONE,   &relative_paths},
293   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd},
294   {"block-size",      'B', POPT_ARG_INT,    &block_size},
295   {"max-delete",       0,  POPT_ARG_INT,    &max_delete},
296   {"timeout",          0,  POPT_ARG_INT,    &io_timeout},
297   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir},
298   {"compare-dest",     0,  POPT_ARG_STRING, &compare_dest},
299   /* TODO: Should this take an optional int giving the compression level? */
300   {"compress",        'z', POPT_ARG_NONE,   &do_compression},
301   {"daemon",           0,  POPT_ARG_NONE,   &am_daemon},
302   {"no-detach",        0,  POPT_ARG_NONE,   &global_opts.no_detach},
303   {"stats",            0,  POPT_ARG_NONE,   &do_stats},
304   {"progress",         0,  POPT_ARG_NONE,   &do_progress},
305   {"partial",          0,  POPT_ARG_NONE,   &keep_partial},
306   {"ignore-errors",    0,  POPT_ARG_NONE,   &ignore_errors},
307   {"blocking-io",      0,  POPT_ARG_NONE,   &blocking_io},
308   {0,                 'P', POPT_ARG_NONE,   0,               'P'},
309   {"config",           0,  POPT_ARG_STRING, &config_file},
310   {"port",             0,  POPT_ARG_INT,    &rsync_port},
311   {"log-format",       0,  POPT_ARG_STRING, &log_format},
312   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit},
313   {"address",          0,  POPT_ARG_STRING, &bind_address, 0},
314   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir},
315   {"hard-links",      'H', POPT_ARG_NONE,   &preserve_hard_links},
316   {"read-batch",      'f', POPT_ARG_STRING, &batch_ext, 'f'},
317   {"write-batch",     'F', POPT_ARG_NONE,   &write_batch, 0},
318 #ifdef INET6
319   {0,                 '4', POPT_ARG_VAL,    &global_opts.af_hint,   AF_INET },
320   {0,                 '6', POPT_ARG_VAL,    &global_opts.af_hint,   AF_INET6 },
321 #endif
322   {0,0,0,0}
323 };
324
325
326 static char err_buf[100];
327
328
329 /* We store the option error message, if any, so that we can log the
330    connection attempt (which requires parsing the options), and then
331    show the error later on. */
332 void option_error(void)
333 {
334         if (err_buf[0]) {
335                 rprintf(FLOG, "%s", err_buf);
336                 rprintf(FERROR, "%s: %s", RSYNC_NAME, err_buf);
337         } else {
338                 rprintf (FERROR, "Error parsing options: "
339                          "option may be supported on client but not on server?\n");
340                 rprintf (FERROR, RSYNC_NAME ": Error parsing options: "
341                          "option may be supported on client but not on server?\n");
342         }
343 }
344
345 /* check to see if we should refuse this option */
346 static int check_refuse_options(char *ref, int opt)
347 {
348         int i, len;
349         char *p;
350         const char *name;
351
352         for (i=0; long_options[i].longName; i++) {
353                 if (long_options[i].val == opt) break;
354         }
355         
356         if (!long_options[i].longName) return 0;
357
358         name = long_options[i].longName;
359         len = strlen(name);
360
361         while ((p = strstr(ref,name))) {
362                 if ((p==ref || p[-1]==' ') &&
363                     (p[len] == ' ' || p[len] == 0)) {
364                         snprintf(err_buf,sizeof(err_buf),
365                                  "The '%s' option is not supported by this server\n", name);
366                         return 1;
367                 }
368                 ref += len;
369         }
370         return 0;
371 }
372
373
374 static int count_args(char const **argv)
375 {
376         int i = 0;
377
378         while (argv[i] != NULL)
379                 i++;
380         
381         return i;
382 }
383
384
385 /* Process command line arguments.  Called on both local and remote.
386  * Returns if all options are OK, otherwise fills in err_buf and
387  * returns 0. */
388 int parse_arguments(int *argc, const char ***argv, int frommain)
389 {
390         int opt;
391         char *ref = lp_refuse_options(module_id);
392         poptContext pc;
393
394         /* TODO: Call poptReadDefaultConfig; handle errors. */
395
396         /* The context leaks in case of an error, but if there's a
397          * problem we always exit anyhow. */
398         pc = poptGetContext(RSYNC_NAME, *argc, *argv, long_options, 0);
399
400         while ((opt = poptGetNextOpt(pc)) != -1) {
401                 if (ref) {
402                         if (check_refuse_options(ref, opt)) return 0;
403                 }
404
405                 /* most options are handled automatically by popt;
406                  * only special cases are returned and listed here. */
407
408                 switch (opt) {
409                 case OPT_VERSION:
410                         print_rsync_version(FINFO);
411                         exit_cleanup(0);
412                         
413                 case OPT_MODIFY_WINDOW:
414                         /* The value has already been set by popt, but
415                          * we need to remember that we're using a
416                          * non-default setting. */
417                         modify_window_set = 1;
418                         break;
419                         
420                 case OPT_DELETE_EXCLUDED:
421                         delete_excluded = 1;
422                         delete_mode = 1;
423                         break;
424
425                 case OPT_EXCLUDE:
426                         add_exclude(poptGetOptArg(pc), 0);
427                         break;
428
429                 case OPT_INCLUDE:
430                         add_exclude(poptGetOptArg(pc), 1);
431                         break;
432
433                 case OPT_EXCLUDE_FROM:
434                         add_exclude_file(poptGetOptArg(pc), 1, 0);
435                         break;
436
437                 case OPT_INCLUDE_FROM:
438                         add_exclude_file(poptGetOptArg(pc), 1, 1);
439                         break;
440
441                 case 'h':
442                         usage(FINFO);
443                         exit_cleanup(0);
444
445                 case 'H':
446 #if SUPPORT_HARD_LINKS
447                         preserve_hard_links=1;
448 #else
449                         /* FIXME: Don't say "server" if this is
450                          * happening on the client. */
451                         /* FIXME: Why do we have the duplicated
452                          * rprintf?  Everybody who gets this message
453                          * ought to send it to the client and also to
454                          * the logs. */
455                         snprintf(err_buf,sizeof(err_buf),
456                                  "hard links are not supported on this %s\n",
457                                  am_server ? "server" : "client");
458                         rprintf(FERROR,"ERROR: hard links not supported on this platform\n");
459                         return 0;
460 #endif /* SUPPORT_HARD_LINKS */
461                         break;
462
463                 case 'v':
464                         verbose++;
465                         break;
466
467                 case 'q':
468                         if (frommain) quiet++;
469                         break;
470
471                 case 'a':
472                         recurse=1;
473 #if SUPPORT_LINKS
474                         preserve_links=1;
475 #endif
476                         preserve_perms=1;
477                         preserve_times=1;
478                         preserve_gid=1;
479                         preserve_uid=1;
480                         preserve_devices=1;
481                         break;
482
483                 case OPT_SENDER:
484                         if (!am_server) {
485                                 usage(FERROR);
486                                 exit_cleanup(RERR_SYNTAX);
487                         }
488                         am_sender = 1;
489                         break;
490
491                 case 'P':
492                         do_progress = 1;
493                         keep_partial = 1;
494                         break;
495
496
497                 case 'f':
498                         /* The filename is stored for us by popt */
499                         read_batch = 1;
500                         break;
501
502                 default:
503                         /* FIXME: If --daemon is specified, then errors for later
504                          * parameters seem to disappear. */
505                         snprintf(err_buf, sizeof(err_buf),
506                                  "%s%s: %s\n",
507                                  am_server ? "on remote machine: " : "",
508                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
509                                  poptStrerror(opt));
510                         return 0;
511                 }
512         }
513
514         *argv = poptGetArgs(pc);
515         if (*argv)
516                 *argc = count_args(*argv);
517         else
518                 *argc = 0;
519
520         return 1;
521 }
522
523
524 /* Construct a filtered list of options to pass through from the
525  * client to the server */
526 void server_options(char **args,int *argc)
527 {
528         int ac = *argc;
529         static char argstr[50];
530         static char bsize[30];
531         static char iotime[30];
532         static char mdelete[30];
533         static char mwindow[30];
534         static char bw[50];
535         static char fext[20]; /* dw */
536
537         int i, x;
538
539         args[ac++] = "--server";
540
541         if (!am_sender)
542                 args[ac++] = "--sender";
543
544         x = 1;
545         argstr[0] = '-';
546         for (i=0;i<verbose;i++)
547                 argstr[x++] = 'v';
548
549         /* the -q option is intentionally left out */
550         if (make_backups)
551                 argstr[x++] = 'b';
552         if (update_only)
553                 argstr[x++] = 'u';
554         if (dry_run)
555                 argstr[x++] = 'n';
556         if (preserve_links)
557                 argstr[x++] = 'l';
558         if (copy_links)
559                 argstr[x++] = 'L';
560         if (whole_file)
561                 argstr[x++] = 'W';
562         if (preserve_hard_links)
563                 argstr[x++] = 'H';
564         if (preserve_uid)
565                 argstr[x++] = 'o';
566         if (preserve_gid)
567                 argstr[x++] = 'g';
568         if (preserve_devices)
569                 argstr[x++] = 'D';
570         if (preserve_times)
571                 argstr[x++] = 't';
572         if (preserve_perms)
573                 argstr[x++] = 'p';
574         if (recurse)
575                 argstr[x++] = 'r';
576         if (always_checksum)
577                 argstr[x++] = 'c';
578         if (cvs_exclude)
579                 argstr[x++] = 'C';
580         if (ignore_times)
581                 argstr[x++] = 'I';
582         if (relative_paths)
583                 argstr[x++] = 'R';
584         if (one_file_system)
585                 argstr[x++] = 'x';
586         if (sparse_files)
587                 argstr[x++] = 'S';
588         if (do_compression)
589                 argstr[x++] = 'z';
590         if (write_batch)
591             argstr[x++] = 'F'; /* dw */
592
593         /* this is a complete hack - blame Rusty 
594
595            this is a hack to make the list_only (remote file list)
596            more useful */
597         if (list_only && !recurse) 
598                 argstr[x++] = 'r';
599
600         argstr[x] = 0;
601
602         if (x != 1) args[ac++] = argstr;
603
604         if (block_size != BLOCK_SIZE) {
605                 snprintf(bsize,sizeof(bsize),"-B%d",block_size);
606                 args[ac++] = bsize;
607         }    
608
609         if (max_delete && am_sender) {
610                 snprintf(mdelete,sizeof(mdelete),"--max-delete=%d",max_delete);
611                 args[ac++] = mdelete;
612         }    
613         
614         if (batch_ext != NULL) {
615                 sprintf(fext,"-f%s",batch_ext);
616                 args[ac++] = fext;
617         }
618
619         if (io_timeout) {
620                 snprintf(iotime,sizeof(iotime),"--timeout=%d",io_timeout);
621                 args[ac++] = iotime;
622         }    
623
624         if (bwlimit) {
625                 snprintf(bw,sizeof(bw),"--bwlimit=%d",bwlimit);
626                 args[ac++] = bw;
627         }
628
629         if (strcmp(backup_suffix, BACKUP_SUFFIX)) {
630                 args[ac++] = "--suffix";
631                 args[ac++] = backup_suffix;
632         }
633
634         if (delete_mode && !delete_excluded)
635                 args[ac++] = "--delete";
636
637         if (delete_excluded)
638                 args[ac++] = "--delete-excluded";
639
640         if (size_only)
641                 args[ac++] = "--size-only";
642
643         if (modify_window_set) {
644                 snprintf(mwindow,sizeof(mwindow),"--modify-window=%d",
645                          modify_window);
646                 args[ac++] = mwindow;
647         }
648
649         if (keep_partial)
650                 args[ac++] = "--partial";
651
652         if (force_delete)
653                 args[ac++] = "--force";
654
655         if (delete_after)
656                 args[ac++] = "--delete-after";
657
658         if (ignore_errors)
659                 args[ac++] = "--ignore-errors";
660
661         if (copy_unsafe_links)
662                 args[ac++] = "--copy-unsafe-links";
663
664         if (safe_symlinks)
665                 args[ac++] = "--safe-links";
666
667         if (numeric_ids)
668                 args[ac++] = "--numeric-ids";
669
670         if (only_existing && am_sender)
671                 args[ac++] = "--existing";
672
673         if (tmpdir) {
674                 args[ac++] = "--temp-dir";
675                 args[ac++] = tmpdir;
676         }
677
678         if (backup_dir && am_sender) {
679                 /* only the receiver needs this option, if we are the sender
680                  *   then we need to send it to the receiver.
681                  */
682                 args[ac++] = "--backup-dir";
683                 args[ac++] = backup_dir;
684         }
685
686         if (compare_dest && am_sender) {
687                 /* the server only needs this option if it is not the sender,
688                  *   and it may be an older version that doesn't know this
689                  *   option, so don't send it if client is the sender.
690                  */
691                 args[ac++] = "--compare-dest";
692                 args[ac++] = compare_dest;
693         }
694
695
696         *argc = ac;
697 }
698