Fix crash when --backup-dir is excessively long.
[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) 2002-2010 Wayne Davison
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, visit the http://fsf.org website.
20  */
21
22 #include "rsync.h"
23 #include "itypes.h"
24 #include <popt.h>
25 #include "zlib/zlib.h"
26
27 extern int module_id;
28 extern int local_server;
29 extern int sanitize_paths;
30 extern int daemon_over_rsh;
31 extern unsigned int module_dirlen;
32 extern filter_rule_list filter_list;
33 extern filter_rule_list daemon_filter_list;
34
35 int make_backups = 0;
36
37 /**
38  * If 1, send the whole file as literal data rather than trying to
39  * create an incremental diff.
40  *
41  * If -1, then look at whether we're local or remote and go by that.
42  *
43  * @sa disable_deltas_p()
44  **/
45 int whole_file = -1;
46
47 int append_mode = 0;
48 int keep_dirlinks = 0;
49 int copy_dirlinks = 0;
50 int copy_links = 0;
51 int preserve_links = 0;
52 int preserve_hard_links = 0;
53 int preserve_acls = 0;
54 int preserve_xattrs = 0;
55 int preserve_perms = 0;
56 int preserve_executability = 0;
57 int preserve_devices = 0;
58 int preserve_specials = 0;
59 int preserve_uid = 0;
60 int preserve_gid = 0;
61 int preserve_times = 0;
62 int update_only = 0;
63 int cvs_exclude = 0;
64 int dry_run = 0;
65 int do_xfers = 1;
66 int ignore_times = 0;
67 int delete_mode = 0;
68 int delete_during = 0;
69 int delete_before = 0;
70 int delete_after = 0;
71 int delete_excluded = 0;
72 int remove_source_files = 0;
73 int one_file_system = 0;
74 int protocol_version = PROTOCOL_VERSION;
75 int sparse_files = 0;
76 int do_compression = 0;
77 int def_compress_level = Z_DEFAULT_COMPRESSION;
78 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
79 int am_server = 0;
80 int am_sender = 0;
81 int am_starting_up = 1;
82 int relative_paths = -1;
83 int implied_dirs = 1;
84 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
85 int numeric_ids = 0;
86 int msgs2stderr = 0;
87 int allow_8bit_chars = 0;
88 int force_delete = 0;
89 int io_timeout = 0;
90 int prune_empty_dirs = 0;
91 int use_qsort = 0;
92 char *files_from = NULL;
93 int filesfrom_fd = -1;
94 char *filesfrom_host = NULL;
95 int eol_nulls = 0;
96 int protect_args = -1;
97 int human_readable = 1;
98 int recurse = 0;
99 int allow_inc_recurse = 1;
100 int xfer_dirs = -1;
101 int am_daemon = 0;
102 int connect_timeout = 0;
103 int keep_partial = 0;
104 int safe_symlinks = 0;
105 int copy_unsafe_links = 0;
106 int munge_symlinks = 0;
107 int size_only = 0;
108 int daemon_bwlimit = 0;
109 int bwlimit = 0;
110 int fuzzy_basis = 0;
111 size_t bwlimit_writemax = 0;
112 int ignore_existing = 0;
113 int ignore_non_existing = 0;
114 int need_messages_from_generator = 0;
115 int max_delete = INT_MIN;
116 OFF_T max_size = 0;
117 OFF_T min_size = 0;
118 int ignore_errors = 0;
119 int modify_window = 0;
120 int blocking_io = -1;
121 int checksum_seed = 0;
122 int inplace = 0;
123 int delay_updates = 0;
124 long block_size = 0; /* "long" because popt can't set an int32. */
125 char number_separator;
126 char *skip_compress = NULL;
127 item_list dparam_list = EMPTY_ITEM_LIST;
128
129 /** Network address family. **/
130 int default_af_hint
131 #ifdef INET6
132         = 0;            /* Any protocol */
133 #else
134         = AF_INET;      /* Must use IPv4 */
135 # ifdef AF_INET6
136 #  undef AF_INET6
137 # endif
138 # define AF_INET6 AF_INET /* make -6 option a no-op */
139 #endif
140
141 /** Do not go into the background when run as --daemon.  Good
142  * for debugging and required for running as a service on W32,
143  * or under Unix process-monitors. **/
144 int no_detach
145 #if defined _WIN32 || defined __WIN32__
146         = 1;
147 #else
148         = 0;
149 #endif
150
151 int write_batch = 0;
152 int read_batch = 0;
153 int backup_dir_len = 0;
154 int backup_suffix_len;
155 unsigned int backup_dir_remainder;
156
157 char *backup_suffix = NULL;
158 char *tmpdir = NULL;
159 char *partial_dir = NULL;
160 char *basis_dir[MAX_BASIS_DIRS+1];
161 char *config_file = NULL;
162 char *shell_cmd = NULL;
163 char *logfile_name = NULL;
164 char *logfile_format = NULL;
165 char *stdout_format = NULL;
166 char *password_file = NULL;
167 char *rsync_path = RSYNC_PATH;
168 char *backup_dir = NULL;
169 char backup_dir_buf[MAXPATHLEN];
170 char *sockopts = NULL;
171 char *usermap = NULL;
172 char *groupmap = NULL;
173 int rsync_port = 0;
174 int compare_dest = 0;
175 int copy_dest = 0;
176 int link_dest = 0;
177 int basis_dir_cnt = 0;
178 char *dest_option = NULL;
179
180 static int remote_option_alloc = 0;
181 int remote_option_cnt = 0;
182 const char **remote_options = NULL;
183
184 int quiet = 0;
185 int output_motd = 1;
186 int log_before_transfer = 0;
187 int stdout_format_has_i = 0;
188 int stdout_format_has_o_or_i = 0;
189 int logfile_format_has_i = 0;
190 int logfile_format_has_o_or_i = 0;
191 int always_checksum = 0;
192 int list_only = 0;
193
194 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
195 char *batch_name = NULL;
196
197 int need_unsorted_flist = 0;
198 #ifdef ICONV_OPTION
199 char *iconv_opt = ICONV_OPTION;
200 #endif
201
202 struct chmod_mode_struct *chmod_modes = NULL;
203
204 static const char *debug_verbosity[] = {
205         /*0*/ NULL,
206         /*1*/ NULL,
207         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
208         /*3*/ "ACL,BACKUP,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
209         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
210         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
211 };
212
213 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
214
215 static const char *info_verbosity[1+MAX_VERBOSITY] = {
216         /*0*/ NULL,
217         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
218         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
219 };
220
221 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
222
223 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
224
225 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
226 #define HELP_PRIORITY 1         /* The help output uses this level. */
227 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
228 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
229
230 #define W_CLI (1<<0)    /* client side */
231 #define W_SRV (1<<1)    /* server side */
232 #define W_SND (1<<2)    /* sending side */
233 #define W_REC (1<<3)    /* receiving side */
234
235 struct output_struct {
236         char *name;     /* The name of the info/debug flag. */
237         char *help;     /* The description of the info/debug flag. */
238         uchar namelen;  /* The length of the name string. */
239         uchar flag;     /* The flag's value, for consistency check. */
240         uchar where;    /* Bits indicating where the flag is used. */
241         uchar priority; /* See *_PRIORITY defines. */
242 };
243
244 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
245
246 static struct output_struct info_words[COUNT_INFO+1] = {
247         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
248         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
249         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
250         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
251         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
252         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
253         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
254         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
255         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
256         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
257         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
258         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
259         { NULL, "--info", 0, 0, 0, 0 }
260 };
261
262 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
263
264 static struct output_struct debug_words[COUNT_DEBUG+1] = {
265         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
266         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
267         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
268         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
269         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events"),
270         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
271         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
272         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
273         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
274         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
275         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
276         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
277         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
278         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
279         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
280         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
281         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
282         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
283         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
284         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
285         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
286         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
287         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
288         { NULL, "--debug", 0, 0, 0, 0 }
289 };
290
291 static int verbose = 0;
292 static int do_stats = 0;
293 static int do_progress = 0;
294 static int daemon_opt;   /* sets am_daemon after option error-reporting */
295 static int omit_dir_times = 0;
296 static int omit_link_times = 0;
297 static int F_option_cnt = 0;
298 static int modify_window_set;
299 static int itemize_changes = 0;
300 static int refused_delete, refused_archive_part, refused_compress;
301 static int refused_partial, refused_progress, refused_delete_before;
302 static int refused_delete_during;
303 static int refused_inplace, refused_no_iconv;
304 static BOOL usermap_via_chown, groupmap_via_chown;
305 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
306 static char tmp_partialdir[] = ".~tmp~";
307
308 /** Local address to bind.  As a character string because it's
309  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
310  * address, or a hostname. **/
311 char *bind_address;
312
313 static void output_item_help(struct output_struct *words);
314
315 /* This constructs a string that represents all the options set for either
316  * the --info or --debug setting, skipping any implied options (by -v, etc.).
317  * This is used both when conveying the user's options to the server, and
318  * when the help output wants to tell the user what options are implied. */
319 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
320 {
321         char *str = words == info_words ? "--info=" : "--debug=";
322         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
323         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
324         char *buf;
325
326         memset(counts, 0, sizeof counts);
327
328         for (j = 0; words[j].name; j++) {
329                 if (words[j].flag != j) {
330                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
331                                 words == info_words ? "INFO_" : "DEBUG_",
332                                 words[j].name, words[j].flag, j);
333                         exit_cleanup(RERR_UNSUPPORTED);
334                 }
335                 if (!(words[j].where & where))
336                         continue;
337                 if (words[j].priority == DEFAULT_PRIORITY) {
338                         /* Implied items don't need to be mentioned. */
339                         skipped++;
340                         continue;
341                 }
342                 len += len ? 1 : strlen(str);
343                 len += strlen(words[j].name);
344                 len += levels[j] == 1 ? 0 : 1;
345
346                 if (words[j].priority == HELP_PRIORITY)
347                         continue; /* no abbreviating for help */
348
349                 assert(levels[j] <= MAX_OUT_LEVEL);
350                 if (++counts[levels[j]] > max) {
351                         /* Determine which level has the most items. */
352                         lev = levels[j];
353                         max = counts[lev];
354                 }
355         }
356
357         /* Sanity check the COUNT_* define against the length of the table. */
358         if (j != word_count) {
359                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
360                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
361                         j, word_count);
362                 exit_cleanup(RERR_UNSUPPORTED);
363         }
364
365         if (!len)
366                 return NULL;
367
368         len++;
369         if (!(buf = new_array(char, len)))
370                 out_of_memory("make_output_option");
371         pos = 0;
372
373         if (skipped || max < 5)
374                 lev = -1;
375         else {
376                 if (lev == 0)
377                         pos += snprintf(buf, len, "%sNONE", str);
378                 else if (lev == 1)
379                         pos += snprintf(buf, len, "%sALL", str);
380                 else
381                         pos += snprintf(buf, len, "%sALL%d", str, lev);
382         }
383
384         for (j = 0; words[j].name && pos < len; j++) {
385                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
386                         continue;
387                 if (pos)
388                         buf[pos++] = ',';
389                 else
390                         pos += strlcpy(buf+pos, str, len-pos);
391                 if (pos < len)
392                         pos += strlcpy(buf+pos, words[j].name, len-pos);
393                 /* Level 1 is implied by the name alone. */
394                 if (levels[j] != 1 && pos < len)
395                         buf[pos++] = '0' + levels[j];
396         }
397
398         buf[pos] = '\0';
399
400         return buf;
401 }
402
403 static void parse_output_words(struct output_struct *words, short *levels,
404                                const char *str, uchar priority)
405 {
406         const char *s;
407         int j, len, lev;
408
409         if (!str)
410                 return;
411
412         while (*str) {
413                 if ((s = strchr(str, ',')) != NULL)
414                         len = s++ - str;
415                 else
416                         len = strlen(str);
417                 while (len && isDigit(str+len-1))
418                         len--;
419                 lev = isDigit(str+len) ? atoi(str+len) : 1;
420                 if (lev > MAX_OUT_LEVEL)
421                         lev = MAX_OUT_LEVEL;
422                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
423                         output_item_help(words);
424                         exit_cleanup(0);
425                 }
426                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
427                         len = lev = 0;
428                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
429                         len = 0;
430                 for (j = 0; words[j].name; j++) {
431                         if (!len
432                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
433                                 if (priority >= words[j].priority) {
434                                         words[j].priority = priority;
435                                         levels[j] = lev;
436                                 }
437                                 if (len)
438                                         break;
439                         }
440                 }
441                 if (len && !words[j].name) {
442                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
443                                 words[j].help, len, str);
444                         exit_cleanup(RERR_SYNTAX);
445                 }
446                 if (!s)
447                         break;
448                 str = s;
449         }
450 }
451
452 /* Tell the user what all the info or debug flags mean. */
453 static void output_item_help(struct output_struct *words)
454 {
455         short *levels = words == info_words ? info_levels : debug_levels;
456         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
457         char buf[128], *opt, *fmt = "%-10s %s\n";
458         int j;
459
460         reset_output_levels();
461
462         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
463         rprintf(FINFO, "\n");
464         for (j = 0; words[j].name; j++)
465                 rprintf(FINFO, fmt, words[j].name, words[j].help);
466         rprintf(FINFO, "\n");
467
468         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
469                  words[j].help, MAX_OUT_LEVEL);
470         rprintf(FINFO, fmt, "ALL", buf);
471
472         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
473                  words[j].help);
474         rprintf(FINFO, fmt, "NONE", buf);
475
476         rprintf(FINFO, fmt, "HELP", "Output this help message");
477         rprintf(FINFO, "\n");
478         rprintf(FINFO, "Options added for each increase in verbose level:\n");
479
480         for (j = 1; j <= MAX_VERBOSITY; j++) {
481                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
482                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
483                 if (opt) {
484                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
485                         free(opt);
486                 }
487                 reset_output_levels();
488         }
489 }
490
491 /* The --verbose option now sets info+debug flags. */
492 static void set_output_verbosity(int level, uchar priority)
493 {
494         int j;
495
496         if (level > MAX_VERBOSITY)
497                 level = MAX_VERBOSITY;
498
499         for (j = 1; j <= level; j++) {
500                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
501                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
502         }
503 }
504
505 /* Limit the info+debug flag levels given a verbose-option level limit. */
506 void limit_output_verbosity(int level)
507 {
508         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
509         int j;
510
511         if (level > MAX_VERBOSITY)
512                 return;
513
514         memset(info_limits, 0, sizeof info_limits);
515         memset(debug_limits, 0, sizeof debug_limits);
516
517         /* Compute the level limits in the above arrays. */
518         for (j = 1; j <= level; j++) {
519                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
520                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
521         }
522
523         for (j = 0; j < COUNT_INFO; j++) {
524                 if (info_levels[j] > info_limits[j])
525                         info_levels[j] = info_limits[j];
526         }
527
528         for (j = 0; j < COUNT_DEBUG; j++) {
529                 if (debug_levels[j] > debug_limits[j])
530                         debug_levels[j] = debug_limits[j];
531         }
532 }
533
534 void reset_output_levels(void)
535 {
536         int j;
537
538         memset(info_levels, 0, sizeof info_levels);
539         memset(debug_levels, 0, sizeof debug_levels);
540
541         for (j = 0; j < COUNT_INFO; j++)
542                 info_words[j].priority = DEFAULT_PRIORITY;
543
544         for (j = 0; j < COUNT_DEBUG; j++)
545                 debug_words[j].priority = DEFAULT_PRIORITY;
546 }
547
548 void negate_output_levels(void)
549 {
550         int j;
551
552         for (j = 0; j < COUNT_INFO; j++)
553                 info_levels[j] *= -1;
554
555         for (j = 0; j < COUNT_DEBUG; j++)
556                 debug_levels[j] *= -1;
557 }
558
559 static void print_rsync_version(enum logcode f)
560 {
561         char *subprotocol = "";
562         char const *got_socketpair = "no ";
563         char const *have_inplace = "no ";
564         char const *hardlinks = "no ";
565         char const *symtimes = "no ";
566         char const *acls = "no ";
567         char const *xattrs = "no ";
568         char const *links = "no ";
569         char const *iconv = "no ";
570         char const *ipv6 = "no ";
571         STRUCT_STAT *dumstat;
572
573 #if SUBPROTOCOL_VERSION != 0
574         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
575                 out_of_memory("print_rsync_version");
576 #endif
577 #ifdef HAVE_SOCKETPAIR
578         got_socketpair = "";
579 #endif
580 #ifdef HAVE_FTRUNCATE
581         have_inplace = "";
582 #endif
583 #ifdef SUPPORT_HARD_LINKS
584         hardlinks = "";
585 #endif
586 #ifdef SUPPORT_ACLS
587         acls = "";
588 #endif
589 #ifdef SUPPORT_XATTRS
590         xattrs = "";
591 #endif
592 #ifdef SUPPORT_LINKS
593         links = "";
594 #endif
595 #ifdef INET6
596         ipv6 = "";
597 #endif
598 #ifdef ICONV_OPTION
599         iconv = "";
600 #endif
601 #ifdef CAN_SET_SYMLINK_TIMES
602         symtimes = "";
603 #endif
604
605         rprintf(f, "%s  version %s  protocol version %d%s\n",
606                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
607         rprintf(f, "Copyright (C) 1996-2010 by Andrew Tridgell, Wayne Davison, and others.\n");
608         rprintf(f, "Web site: http://rsync.samba.org/\n");
609         rprintf(f, "Capabilities:\n");
610         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
611                 (int)(sizeof (OFF_T) * 8),
612                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
613                 (int)(sizeof (time_t) * 8),
614                 (int)(sizeof (int64) * 8));
615         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
616                 got_socketpair, hardlinks, links, ipv6, have_inplace);
617         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes\n",
618                 have_inplace, acls, xattrs, iconv, symtimes);
619
620 #ifdef MAINTAINER_MODE
621         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
622 #endif
623
624 #if SIZEOF_INT64 < 8
625         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
626 #endif
627         if (sizeof (int64) != SIZEOF_INT64) {
628                 rprintf(f,
629                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
630                         (int) SIZEOF_INT64, (int) sizeof (int64));
631         }
632
633         rprintf(f,"\n");
634         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
635         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
636         rprintf(f,"General Public Licence for details.\n");
637 }
638
639
640 void usage(enum logcode F)
641 {
642   print_rsync_version(F);
643
644   rprintf(F,"\n");
645   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
646   rprintf(F,"via a fast differencing algorithm.\n");
647
648   rprintf(F,"\n");
649   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
650   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
651   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
652   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
653   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
654   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
655   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
656   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
657   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
658   rprintf(F,"\n");
659   rprintf(F,"Options\n");
660   rprintf(F," -v, --verbose               increase verbosity\n");
661   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
662   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
663   rprintf(F," -q, --quiet                 suppress non-error messages\n");
664   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
665   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
666   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
667   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
668   rprintf(F," -r, --recursive             recurse into directories\n");
669   rprintf(F," -R, --relative              use relative path names\n");
670   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
671   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
672   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
673   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
674   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
675   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
676   rprintf(F,"     --append                append data onto shorter files\n");
677   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
678   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
679   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
680   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
681   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
682   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
683   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
684   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
685   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
686   rprintf(F," -H, --hard-links            preserve hard links\n");
687   rprintf(F," -p, --perms                 preserve permissions\n");
688   rprintf(F," -E, --executability         preserve the file's executability\n");
689   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
690 #ifdef SUPPORT_ACLS
691   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
692 #endif
693 #ifdef SUPPORT_XATTRS
694   rprintf(F," -X, --xattrs                preserve extended attributes\n");
695 #endif
696   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
697   rprintf(F," -g, --group                 preserve group\n");
698   rprintf(F,"     --devices               preserve device files (super-user only)\n");
699   rprintf(F,"     --specials              preserve special files\n");
700   rprintf(F," -D                          same as --devices --specials\n");
701   rprintf(F," -t, --times                 preserve modification times\n");
702   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
703   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
704   rprintf(F,"     --super                 receiver attempts super-user activities\n");
705 #ifdef SUPPORT_XATTRS
706   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
707 #endif
708   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
709   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
710   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
711   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
712   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
713   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
714   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
715   rprintf(F,"     --existing              skip creating new files on receiver\n");
716   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
717   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
718   rprintf(F,"     --del                   an alias for --delete-during\n");
719   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
720   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
721   rprintf(F,"     --delete-during         receiver deletes during transfer (default)\n");
722   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
723   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
724   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
725   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
726   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
727   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
728   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
729   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
730   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
731   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
732   rprintf(F,"     --partial               keep partially transferred files\n");
733   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
734   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
735   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
736   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
737   rprintf(F,"     --usermap=STRING        custom username mapping\n");
738   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
739   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
740   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
741   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
742   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
743   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
744   rprintf(F,"     --size-only             skip files that match in size\n");
745   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
746   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
747   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
748   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
749   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
750   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
751   rprintf(F," -z, --compress              compress file data during the transfer\n");
752   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
753   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
754   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
755   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
756   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
757   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
758   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
759   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
760   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
761   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
762   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
763   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
764   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
765   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
766   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
767   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
768   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
769   rprintf(F,"     --stats                 give some file-transfer stats\n");
770   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
771   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
772   rprintf(F,"     --progress              show progress during transfer\n");
773   rprintf(F," -P                          same as --partial --progress\n");
774   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
775   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
776   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
777   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
778   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
779   rprintf(F,"     --list-only             list the files instead of copying them\n");
780   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
781   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
782   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
783   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
784   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
785 #ifdef ICONV_OPTION
786   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
787 #endif
788   rprintf(F," -4, --ipv4                  prefer IPv4\n");
789   rprintf(F," -6, --ipv6                  prefer IPv6\n");
790   rprintf(F,"     --version               print version number\n");
791   rprintf(F,"(-h) --help                  show this help (-h works with no other options)\n");
792
793   rprintf(F,"\n");
794   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
795   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
796   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
797 }
798
799 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
800       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
801       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
802       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
803       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
804       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
805       OPT_SERVER, OPT_REFUSED_BASE = 9000};
806
807 static struct poptOption long_options[] = {
808   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
809   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
810   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
811   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
812   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
813   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
814   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
815   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
816   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
817   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
818   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
819   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
820   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
821   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
822   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
823   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
824   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
825   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
826   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
827   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
828   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
829   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
830   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
831   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
832   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
833   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
834   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
835   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
836   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
837   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
838   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
839   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
840   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
841   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
842   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
843   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
844   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
845   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
846   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
847   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
848   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
849   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
850   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
851   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
852   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
853   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
854   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
855   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
856   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
857   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
858   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
859   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
860   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
861   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
862   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
863   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
864   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
865   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
866   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
867   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
868   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
869   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
870   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
871   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
872   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
873   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
874   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
875   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
876   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
877   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
878   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
879   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
880   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
881   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
882   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
883   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
884   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
885   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
886   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
887   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
888   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
889   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
890   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
891   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
892   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
893   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
894   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
895   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
896   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
897   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
898   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
899   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
900   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
901   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
902   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
903   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
904   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
905   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
906   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
907   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
908   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
909   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
910   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
911   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
912   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
913   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
914   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
915   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
916   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
917   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
918   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
919   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
920   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
921   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
922   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
923   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
924   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
925   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
926   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
927   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
928   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
929   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
930   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
931   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
932   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
933   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
934   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
935   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
936   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
937   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
938   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
939   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
940   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
941   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
942   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
943   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
944   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
945   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
946   {"fuzzy",           'y', POPT_ARG_VAL,    &fuzzy_basis, 1, 0, 0 },
947   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
948   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
949   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
950   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
951   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
952   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
953   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
954   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
955   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
956   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
957   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
958   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
959   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
960   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
961   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
962   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
963   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
964   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
965   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
966   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
967   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
968   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
969   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
970   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
971   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
972   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
973   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
974   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
975   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
976   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
977   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
978   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
979   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
980   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
981   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
982   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
983   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
984   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
985   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
986   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
987   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
988   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
989   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
990   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
991   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
992   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
993   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
994   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
995   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
996   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
997   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
998   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
999   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1000 #ifdef ICONV_OPTION
1001   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1002   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1003 #endif
1004   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1005   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1006   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1007   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1008   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1009   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1010   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1011   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1012   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1013   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1014   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1015   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1016   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1017   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1018   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1019   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1020   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1021   /* All the following options switch us into daemon-mode option-parsing. */
1022   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1023   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1024   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1025   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1026   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1027   {0,0,0,0, 0, 0, 0}
1028 };
1029
1030 static void daemon_usage(enum logcode F)
1031 {
1032   print_rsync_version(F);
1033
1034   rprintf(F,"\n");
1035   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1036   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1037   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1038   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1039   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1040   rprintf(F,"     --no-detach             do not detach from the parent\n");
1041   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1042   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1043   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1044   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1045   rprintf(F," -v, --verbose               increase verbosity\n");
1046   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1047   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1048   rprintf(F,"     --help                  show this help screen\n");
1049
1050   rprintf(F,"\n");
1051   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1052   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1053 }
1054
1055 static struct poptOption long_daemon_options[] = {
1056   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1057   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1058   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1059   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1060   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1061   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1062   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1063   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1064   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1065   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1066   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1067   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1068   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1069   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1070   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1071   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1072   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1073   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1074   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1075   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1076   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1077   {0,0,0,0, 0, 0, 0}
1078 };
1079
1080
1081 static char err_buf[200];
1082
1083
1084 /**
1085  * Store the option error message, if any, so that we can log the
1086  * connection attempt (which requires parsing the options), and then
1087  * show the error later on.
1088  **/
1089 void option_error(void)
1090 {
1091         if (!err_buf[0]) {
1092                 strlcpy(err_buf, "Error parsing options: option may "
1093                         "be supported on client but not on server?\n",
1094                         sizeof err_buf);
1095         }
1096
1097         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1098         msleep(20);
1099 }
1100
1101
1102 /**
1103  * Tweak the option table to disable all options that the rsyncd.conf
1104  * file has told us to refuse.
1105  **/
1106 static void set_refuse_options(char *bp)
1107 {
1108         struct poptOption *op;
1109         char *cp, shortname[2];
1110         int is_wild, found_match;
1111
1112         shortname[1] = '\0';
1113
1114         while (1) {
1115                 while (*bp == ' ') bp++;
1116                 if (!*bp)
1117                         break;
1118                 if ((cp = strchr(bp, ' ')) != NULL)
1119                         *cp= '\0';
1120                 is_wild = strpbrk(bp, "*?[") != NULL;
1121                 found_match = 0;
1122                 for (op = long_options; ; op++) {
1123                         *shortname = op->shortName;
1124                         if (!op->longName && !*shortname)
1125                                 break;
1126                         if ((op->longName && wildmatch(bp, op->longName))
1127                             || (*shortname && wildmatch(bp, shortname))) {
1128                                 if (op->argInfo == POPT_ARG_VAL)
1129                                         op->argInfo = POPT_ARG_NONE;
1130                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1131                                 found_match = 1;
1132                                 /* These flags are set to let us easily check
1133                                  * an implied option later in the code. */
1134                                 switch (*shortname) {
1135                                 case 'r': case 'd': case 'l': case 'p':
1136                                 case 't': case 'g': case 'o': case 'D':
1137                                         refused_archive_part = op->val;
1138                                         break;
1139                                 case 'z':
1140                                         refused_compress = op->val;
1141                                         break;
1142                                 case '\0':
1143                                         if (wildmatch("delete", op->longName))
1144                                                 refused_delete = op->val;
1145                                         else if (wildmatch("delete-before", op->longName))
1146                                                 refused_delete_before = op->val;
1147                                         else if (wildmatch("delete-during", op->longName))
1148                                                 refused_delete_during = op->val;
1149                                         else if (wildmatch("partial", op->longName))
1150                                                 refused_partial = op->val;
1151                                         else if (wildmatch("progress", op->longName))
1152                                                 refused_progress = op->val;
1153                                         else if (wildmatch("inplace", op->longName))
1154                                                 refused_inplace = op->val;
1155                                         else if (wildmatch("no-iconv", op->longName))
1156                                                 refused_no_iconv = op->val;
1157                                         break;
1158                                 }
1159                                 if (!is_wild)
1160                                         break;
1161                         }
1162                 }
1163                 if (!found_match) {
1164                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1165                                 bp);
1166                 }
1167                 if (!cp)
1168                         break;
1169                 *cp = ' ';
1170                 bp = cp + 1;
1171         }
1172 }
1173
1174
1175 static int count_args(const char **argv)
1176 {
1177         int i = 0;
1178
1179         if (argv) {
1180                 while (argv[i] != NULL)
1181                         i++;
1182         }
1183
1184         return i;
1185 }
1186
1187
1188 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1189 {
1190         int reps, mult, make_compatible = 0;
1191         const char *arg;
1192         OFF_T size = 1;
1193
1194         for (arg = *size_arg; isDigit(arg); arg++) {}
1195         if (*arg == '.')
1196                 for (arg++; isDigit(arg); arg++) {}
1197         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1198         case 'b': case 'B':
1199                 reps = 0;
1200                 break;
1201         case 'k': case 'K':
1202                 reps = 1;
1203                 break;
1204         case 'm': case 'M':
1205                 reps = 2;
1206                 break;
1207         case 'g': case 'G':
1208                 reps = 3;
1209                 break;
1210         default:
1211                 return -1;
1212         }
1213         if (*arg == 'b' || *arg == 'B')
1214                 mult = 1000, make_compatible = 1, arg++;
1215         else if (!*arg || *arg == '+' || *arg == '-')
1216                 mult = 1024;
1217         else if (strncasecmp(arg, "ib", 2) == 0)
1218                 mult = 1024, arg += 2;
1219         else
1220                 return -1;
1221         while (reps--)
1222                 size *= mult;
1223         size *= atof(*size_arg);
1224         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1225                 size += atoi(arg), make_compatible = 1, arg += 2;
1226         if (*arg)
1227                 return -1;
1228         if (size > 0 && make_compatible && def_suf == 'b') {
1229                 /* We convert this manually because we may need %lld precision,
1230                  * and that's not a portable sprintf() escape. */
1231                 char buf[128], *s = buf + sizeof buf - 1;
1232                 OFF_T num = size;
1233                 *s = '\0';
1234                 while (num) {
1235                         *--s = (char)(num % 10) + '0';
1236                         num /= 10;
1237                 }
1238                 if (!(*size_arg = strdup(s)))
1239                         out_of_memory("parse_size_arg");
1240         }
1241         return size;
1242 }
1243
1244
1245 static void create_refuse_error(int which)
1246 {
1247         /* The "which" value is the index + OPT_REFUSED_BASE. */
1248         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1249         int n = snprintf(err_buf, sizeof err_buf,
1250                          "The server is configured to refuse --%s\n",
1251                          op->longName) - 1;
1252         if (op->shortName) {
1253                 snprintf(err_buf + n, sizeof err_buf - n,
1254                          " (-%c)\n", op->shortName);
1255         }
1256 }
1257
1258
1259 /**
1260  * Process command line arguments.  Called on both local and remote.
1261  *
1262  * @retval 1 if all options are OK; with globals set to appropriate
1263  * values
1264  *
1265  * @retval 0 on error, with err_buf containing an explanation
1266  **/
1267 int parse_arguments(int *argc_p, const char ***argv_p)
1268 {
1269         static poptContext pc;
1270         char *ref = lp_refuse_options(module_id);
1271         const char *arg, **argv = *argv_p;
1272         int argc = *argc_p;
1273         int opt;
1274
1275         if (ref && *ref)
1276                 set_refuse_options(ref);
1277         if (am_daemon) {
1278                 set_refuse_options("log-file*");
1279 #ifdef ICONV_OPTION
1280                 if (!*lp_charset(module_id))
1281                         set_refuse_options("iconv");
1282 #endif
1283         }
1284
1285 #ifdef ICONV_OPTION
1286         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1287                 iconv_opt = strdup(arg);
1288 #endif
1289
1290         /* TODO: Call poptReadDefaultConfig; handle errors. */
1291
1292         /* The context leaks in case of an error, but if there's a
1293          * problem we always exit anyhow. */
1294         if (pc)
1295                 poptFreeContext(pc);
1296         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1297         if (!am_server)
1298                 poptReadDefaultConfig(pc, 0);
1299
1300         while ((opt = poptGetNextOpt(pc)) != -1) {
1301                 /* most options are handled automatically by popt;
1302                  * only special cases are returned and listed here. */
1303
1304                 switch (opt) {
1305                 case OPT_VERSION:
1306                         print_rsync_version(FINFO);
1307                         exit_cleanup(0);
1308
1309                 case OPT_SERVER:
1310                         if (!am_server) {
1311                                 /* Disable popt aliases on the server side and
1312                                  * then start parsing the options again. */
1313                                 poptFreeContext(pc);
1314                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1315                                                     long_options, 0);
1316                                 am_server = 1;
1317                         }
1318 #ifdef ICONV_OPTION
1319                         iconv_opt = NULL;
1320 #endif
1321                         break;
1322
1323                 case OPT_SENDER:
1324                         if (!am_server) {
1325                                 usage(FERROR);
1326                                 exit_cleanup(RERR_SYNTAX);
1327                         }
1328                         am_sender = 1;
1329                         break;
1330
1331                 case OPT_DAEMON:
1332                         if (am_daemon) {
1333                                 strlcpy(err_buf,
1334                                         "Attempt to hack rsync thwarted!\n",
1335                                         sizeof err_buf);
1336                                 return 0;
1337                         }
1338 #ifdef ICONV_OPTION
1339                         iconv_opt = NULL;
1340 #endif
1341                         protect_args = 0;
1342                         poptFreeContext(pc);
1343                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1344                                             long_daemon_options, 0);
1345                         while ((opt = poptGetNextOpt(pc)) != -1) {
1346                                 char **cpp;
1347                                 switch (opt) {
1348                                 case 'h':
1349                                         daemon_usage(FINFO);
1350                                         exit_cleanup(0);
1351
1352                                 case 'M':
1353                                         arg = poptGetOptArg(pc);
1354                                         if (!strchr(arg, '=')) {
1355                                                 rprintf(FERROR,
1356                                                     "--dparam value is missing an '=': %s\n",
1357                                                     arg);
1358                                                 goto daemon_error;
1359                                         }
1360                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1361                                         *cpp = strdup(arg);
1362                                         break;
1363
1364                                 case 'v':
1365                                         verbose++;
1366                                         break;
1367
1368                                 default:
1369                                         rprintf(FERROR,
1370                                             "rsync: %s: %s (in daemon mode)\n",
1371                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1372                                             poptStrerror(opt));
1373                                         goto daemon_error;
1374                                 }
1375                         }
1376
1377                         if (dparam_list.count && !set_dparams(1))
1378                                 exit_cleanup(RERR_SYNTAX);
1379
1380                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1381                                 snprintf(err_buf, sizeof err_buf,
1382                                          "the --temp-dir path is WAY too long.\n");
1383                                 return 0;
1384                         }
1385
1386                         if (!daemon_opt) {
1387                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1388                             daemon_error:
1389                                 rprintf(FERROR,
1390                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1391                                 exit_cleanup(RERR_SYNTAX);
1392                         }
1393
1394                         *argv_p = argv = poptGetArgs(pc);
1395                         *argc_p = argc = count_args(argv);
1396                         am_starting_up = 0;
1397                         daemon_opt = 0;
1398                         am_daemon = 1;
1399                         return 1;
1400
1401                 case OPT_MODIFY_WINDOW:
1402                         /* The value has already been set by popt, but
1403                          * we need to remember that we're using a
1404                          * non-default setting. */
1405                         modify_window_set = 1;
1406                         break;
1407
1408                 case OPT_FILTER:
1409                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1410                                         rule_template(0), 0);
1411                         break;
1412
1413                 case OPT_EXCLUDE:
1414                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1415                                         rule_template(0), XFLG_OLD_PREFIXES);
1416                         break;
1417
1418                 case OPT_INCLUDE:
1419                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1420                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1421                         break;
1422
1423                 case OPT_EXCLUDE_FROM:
1424                 case OPT_INCLUDE_FROM:
1425                         arg = poptGetOptArg(pc);
1426                         if (sanitize_paths)
1427                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1428                         if (daemon_filter_list.head) {
1429                                 int rej;
1430                                 char *cp = strdup(arg);
1431                                 if (!cp)
1432                                         out_of_memory("parse_arguments");
1433                                 if (!*cp)
1434                                         rej = 1;
1435                                 else {
1436                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1437                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1438                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1439                                 }
1440                                 free(cp);
1441                                 if (rej)
1442                                         goto options_rejected;
1443                         }
1444                         parse_filter_file(&filter_list, arg,
1445                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1446                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1447                         break;
1448
1449                 case 'a':
1450                         if (refused_archive_part) {
1451                                 create_refuse_error(refused_archive_part);
1452                                 return 0;
1453                         }
1454                         if (!recurse) /* preserve recurse == 2 */
1455                                 recurse = 1;
1456 #ifdef SUPPORT_LINKS
1457                         preserve_links = 1;
1458 #endif
1459                         preserve_perms = 1;
1460                         preserve_times = 1;
1461                         preserve_gid = 1;
1462                         preserve_uid = 1;
1463                         preserve_devices = 1;
1464                         preserve_specials = 1;
1465                         break;
1466
1467                 case 'D':
1468                         preserve_devices = preserve_specials = 1;
1469                         break;
1470
1471                 case OPT_NO_D:
1472                         preserve_devices = preserve_specials = 0;
1473                         break;
1474
1475                 case 'h':
1476                         human_readable++;
1477                         break;
1478
1479                 case 'H':
1480                         preserve_hard_links++;
1481                         break;
1482
1483                 case 'i':
1484                         itemize_changes++;
1485                         break;
1486
1487                 case 'v':
1488                         verbose++;
1489                         break;
1490
1491                 case 'q':
1492                         quiet++;
1493                         break;
1494
1495                 case 'x':
1496                         one_file_system++;
1497                         break;
1498
1499                 case 'F':
1500                         switch (++F_option_cnt) {
1501                         case 1:
1502                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1503                                 break;
1504                         case 2:
1505                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1506                                 break;
1507                         }
1508                         break;
1509
1510                 case 'P':
1511                         if (refused_partial || refused_progress) {
1512                                 create_refuse_error(refused_partial
1513                                     ? refused_partial : refused_progress);
1514                                 return 0;
1515                         }
1516                         do_progress = 1;
1517                         keep_partial = 1;
1518                         break;
1519
1520                 case 'z':
1521                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1522                          || def_compress_level > Z_BEST_COMPRESSION) {
1523                                 snprintf(err_buf, sizeof err_buf,
1524                                         "--compress-level value is invalid: %d\n",
1525                                         def_compress_level);
1526                                 return 0;
1527                         }
1528                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1529                         if (do_compression && refused_compress) {
1530                                 create_refuse_error(refused_compress);
1531                                 return 0;
1532                         }
1533                         break;
1534
1535                 case 'M':
1536                         arg = poptGetOptArg(pc);
1537                         if (*arg != '-') {
1538                                 snprintf(err_buf, sizeof err_buf,
1539                                         "Remote option must start with a dash: %s\n", arg);
1540                                 return 0;
1541                         }
1542                         if (remote_option_cnt+2 >= remote_option_alloc) {
1543                                 remote_option_alloc += 16;
1544                                 remote_options = realloc_array(remote_options,
1545                                                         const char *, remote_option_alloc);
1546                                 if (!remote_options)
1547                                         out_of_memory("parse_arguments");
1548                                 if (!remote_option_cnt)
1549                                         remote_options[0] = "ARG0";
1550                         }
1551                         remote_options[++remote_option_cnt] = arg;
1552                         remote_options[remote_option_cnt+1] = NULL;
1553                         break;
1554
1555                 case OPT_WRITE_BATCH:
1556                         /* batch_name is already set */
1557                         write_batch = 1;
1558                         break;
1559
1560                 case OPT_ONLY_WRITE_BATCH:
1561                         /* batch_name is already set */
1562                         write_batch = -1;
1563                         break;
1564
1565                 case OPT_READ_BATCH:
1566                         /* batch_name is already set */
1567                         read_batch = 1;
1568                         break;
1569
1570                 case OPT_NO_ICONV:
1571 #ifdef ICONV_OPTION
1572                         iconv_opt = NULL;
1573 #endif
1574                         break;
1575
1576                 case OPT_MAX_SIZE:
1577                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
1578                                 snprintf(err_buf, sizeof err_buf,
1579                                         "--max-size value is invalid: %s\n",
1580                                         max_size_arg);
1581                                 return 0;
1582                         }
1583                         break;
1584
1585                 case OPT_MIN_SIZE:
1586                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
1587                                 snprintf(err_buf, sizeof err_buf,
1588                                         "--min-size value is invalid: %s\n",
1589                                         min_size_arg);
1590                                 return 0;
1591                         }
1592                         break;
1593
1594                 case OPT_BWLIMIT:
1595                         {
1596                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1597                                 if (limit < 0) {
1598                                         snprintf(err_buf, sizeof err_buf,
1599                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1600                                         return 0;
1601                                 }
1602                                 bwlimit = (limit + 512) / 1024;
1603                                 if (limit && !bwlimit) {
1604                                         snprintf(err_buf, sizeof err_buf,
1605                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1606                                         return 0;
1607                                 }
1608                         }
1609                         break;
1610
1611                 case OPT_APPEND:
1612                         if (am_server)
1613                                 append_mode++;
1614                         else
1615                                 append_mode = 1;
1616                         break;
1617
1618                 case OPT_LINK_DEST:
1619 #ifdef SUPPORT_HARD_LINKS
1620                         link_dest = 1;
1621                         dest_option = "--link-dest";
1622                         goto set_dest_dir;
1623 #else
1624                         snprintf(err_buf, sizeof err_buf,
1625                                  "hard links are not supported on this %s\n",
1626                                  am_server ? "server" : "client");
1627                         return 0;
1628 #endif
1629
1630                 case OPT_COPY_DEST:
1631                         copy_dest = 1;
1632                         dest_option = "--copy-dest";
1633                         goto set_dest_dir;
1634
1635                 case OPT_COMPARE_DEST:
1636                         compare_dest = 1;
1637                         dest_option = "--compare-dest";
1638                 set_dest_dir:
1639                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1640                                 snprintf(err_buf, sizeof err_buf,
1641                                         "ERROR: at most %d %s args may be specified\n",
1642                                         MAX_BASIS_DIRS, dest_option);
1643                                 return 0;
1644                         }
1645                         /* We defer sanitizing this arg until we know what
1646                          * our destination directory is going to be. */
1647                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1648                         break;
1649
1650                 case OPT_CHMOD:
1651                         arg = poptGetOptArg(pc);
1652                         if (!parse_chmod(arg, &chmod_modes)) {
1653                                 snprintf(err_buf, sizeof err_buf,
1654                                     "Invalid argument passed to --chmod (%s)\n",
1655                                     arg);
1656                                 return 0;
1657                         }
1658                         break;
1659
1660                 case OPT_INFO:
1661                         arg = poptGetOptArg(pc);
1662                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1663                         break;
1664
1665                 case OPT_DEBUG:
1666                         arg = poptGetOptArg(pc);
1667                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1668                         break;
1669
1670                 case OPT_USERMAP:
1671                         if (usermap) {
1672                                 if (usermap_via_chown) {
1673                                         snprintf(err_buf, sizeof err_buf,
1674                                             "--usermap conflicts with prior --chown.\n");
1675                                         return 0;
1676                                 }
1677                                 snprintf(err_buf, sizeof err_buf,
1678                                     "You can only specify --usermap once.\n");
1679                                 return 0;
1680                         }
1681                         usermap = (char *)poptGetOptArg(pc);
1682                         usermap_via_chown = False;
1683                         break;
1684
1685                 case OPT_GROUPMAP:
1686                         if (groupmap) {
1687                                 if (groupmap_via_chown) {
1688                                         snprintf(err_buf, sizeof err_buf,
1689                                             "--groupmap conflicts with prior --chown.\n");
1690                                         return 0;
1691                                 }
1692                                 snprintf(err_buf, sizeof err_buf,
1693                                     "You can only specify --groupmap once.\n");
1694                                 return 0;
1695                         }
1696                         groupmap = (char *)poptGetOptArg(pc);
1697                         groupmap_via_chown = False;
1698                         break;
1699
1700                 case OPT_CHOWN: {
1701                         const char *chown = poptGetOptArg(pc);
1702                         int len;
1703                         if ((arg = strchr(chown, ':')) != NULL)
1704                                 len = arg++ - chown;
1705                         else
1706                                 len = strlen(chown);
1707                         if (len) {
1708                                 if (usermap) {
1709                                         if (!usermap_via_chown) {
1710                                                 snprintf(err_buf, sizeof err_buf,
1711                                                     "--chown conflicts with prior --usermap.\n");
1712                                                 return 0;
1713                                         }
1714                                         snprintf(err_buf, sizeof err_buf,
1715                                             "You can only specify a user-affecting --chown once.\n");
1716                                         return 0;
1717                                 }
1718                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1719                                         out_of_memory("parse_arguments");
1720                                 usermap_via_chown = True;
1721                         }
1722                         if (arg && *arg) {
1723                                 if (groupmap) {
1724                                         if (!groupmap_via_chown) {
1725                                                 snprintf(err_buf, sizeof err_buf,
1726                                                     "--chown conflicts with prior --groupmap.\n");
1727                                                 return 0;
1728                                         }
1729                                         snprintf(err_buf, sizeof err_buf,
1730                                             "You can only specify a group-affecting --chown once.\n");
1731                                         return 0;
1732                                 }
1733                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1734                                         out_of_memory("parse_arguments");
1735                                 groupmap_via_chown = True;
1736                         }
1737                         break;
1738                 }
1739
1740                 case OPT_HELP:
1741                         usage(FINFO);
1742                         exit_cleanup(0);
1743
1744                 case 'A':
1745 #ifdef SUPPORT_ACLS
1746                         preserve_acls = 1;
1747                         preserve_perms = 1;
1748                         break;
1749 #else
1750                         /* FIXME: this should probably be ignored with a
1751                          * warning and then countermeasures taken to
1752                          * restrict group and other access in the presence
1753                          * of any more restrictive ACLs, but this is safe
1754                          * for now */
1755                         snprintf(err_buf,sizeof(err_buf),
1756                                  "ACLs are not supported on this %s\n",
1757                                  am_server ? "server" : "client");
1758                         return 0;
1759 #endif
1760
1761                 case 'X':
1762 #ifdef SUPPORT_XATTRS
1763                         preserve_xattrs++;
1764                         break;
1765 #else
1766                         snprintf(err_buf,sizeof(err_buf),
1767                                  "extended attributes are not supported on this %s\n",
1768                                  am_server ? "server" : "client");
1769                         return 0;
1770 #endif
1771
1772                 default:
1773                         /* A large opt value means that set_refuse_options()
1774                          * turned this option off. */
1775                         if (opt >= OPT_REFUSED_BASE) {
1776                                 create_refuse_error(opt);
1777                                 return 0;
1778                         }
1779                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1780                                  am_server ? "on remote machine: " : "",
1781                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1782                                  poptStrerror(opt));
1783                         return 0;
1784                 }
1785         }
1786
1787         if (protect_args < 0) {
1788                 if (am_server)
1789                         protect_args = 0;
1790                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1791                         protect_args = atoi(arg) ? 1 : 0;
1792                 else {
1793 #ifdef RSYNC_USE_PROTECTED_ARGS
1794                         protect_args = 1;
1795 #else
1796                         protect_args = 0;
1797 #endif
1798                 }
1799         }
1800
1801         if (human_readable > 1 && argc == 2 && !am_server) {
1802                 /* Allow the old meaning of 'h' (--help) on its own. */
1803                 usage(FINFO);
1804                 exit_cleanup(0);
1805         }
1806
1807         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1808
1809         if (do_stats) {
1810                 parse_output_words(info_words, info_levels,
1811                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1812         }
1813
1814         if (human_readable) {
1815                 char buf[32];
1816                 snprintf(buf, sizeof buf, "%f", 3.14);
1817                 if (strchr(buf, '.') != NULL)
1818                         number_separator = ',';
1819                 else
1820                         number_separator = '.';
1821         }
1822
1823 #ifdef ICONV_OPTION
1824         if (iconv_opt && protect_args != 2) {
1825                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1826                         iconv_opt = NULL;
1827                 else
1828                         need_unsorted_flist = 1;
1829         }
1830         if (refused_no_iconv && !iconv_opt) {
1831                 create_refuse_error(refused_no_iconv);
1832                 return 0;
1833         }
1834 #endif
1835
1836         if (protect_args == 1 && am_server)
1837                 return 1;
1838
1839         *argv_p = argv = poptGetArgs(pc);
1840         *argc_p = argc = count_args(argv);
1841
1842 #ifndef SUPPORT_LINKS
1843         if (preserve_links && !am_sender) {
1844                 snprintf(err_buf, sizeof err_buf,
1845                          "symlinks are not supported on this %s\n",
1846                          am_server ? "server" : "client");
1847                 return 0;
1848         }
1849 #endif
1850
1851 #ifndef SUPPORT_HARD_LINKS
1852         if (preserve_hard_links) {
1853                 snprintf(err_buf, sizeof err_buf,
1854                          "hard links are not supported on this %s\n",
1855                          am_server ? "server" : "client");
1856                 return 0;
1857         }
1858 #endif
1859
1860 #ifdef SUPPORT_XATTRS
1861         if (am_root < 0 && preserve_xattrs > 1) {
1862                 snprintf(err_buf, sizeof err_buf,
1863                          "--fake-super conflicts with -XX\n");
1864                 return 0;
1865         }
1866 #else
1867         if (am_root < 0) {
1868                 snprintf(err_buf, sizeof err_buf,
1869                          "--fake-super requires an rsync with extended attributes enabled\n");
1870                 return 0;
1871         }
1872 #endif
1873
1874         if (write_batch && read_batch) {
1875                 snprintf(err_buf, sizeof err_buf,
1876                         "--write-batch and --read-batch can not be used together\n");
1877                 return 0;
1878         }
1879         if (write_batch > 0 || read_batch) {
1880                 if (am_server) {
1881                         rprintf(FINFO,
1882                                 "ignoring --%s-batch option sent to server\n",
1883                                 write_batch ? "write" : "read");
1884                         /* We don't actually exit_cleanup(), so that we can
1885                          * still service older version clients that still send
1886                          * batch args to server. */
1887                         read_batch = write_batch = 0;
1888                         batch_name = NULL;
1889                 } else if (dry_run)
1890                         write_batch = 0;
1891         } else if (write_batch < 0 && dry_run)
1892                 write_batch = 0;
1893         if (read_batch && files_from) {
1894                 snprintf(err_buf, sizeof err_buf,
1895                         "--read-batch cannot be used with --files-from\n");
1896                 return 0;
1897         }
1898         if (read_batch && remove_source_files) {
1899                 snprintf(err_buf, sizeof err_buf,
1900                         "--read-batch cannot be used with --remove-%s-files\n",
1901                         remove_source_files == 1 ? "source" : "sent");
1902                 return 0;
1903         }
1904         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1905                 snprintf(err_buf, sizeof err_buf,
1906                         "the batch-file name must be %d characters or less.\n",
1907                         MAX_BATCH_NAME_LEN);
1908                 return 0;
1909         }
1910
1911         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1912                 snprintf(err_buf, sizeof err_buf,
1913                          "the --temp-dir path is WAY too long.\n");
1914                 return 0;
1915         }
1916
1917         if (max_delete < 0 && max_delete != INT_MIN) {
1918                 /* Negative numbers are treated as "no deletions". */
1919                 max_delete = 0;
1920         }
1921
1922         if (compare_dest + copy_dest + link_dest > 1) {
1923                 snprintf(err_buf, sizeof err_buf,
1924                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1925                 return 0;
1926         }
1927
1928         if (files_from) {
1929                 if (recurse == 1) /* preserve recurse == 2 */
1930                         recurse = 0;
1931                 if (xfer_dirs < 0)
1932                         xfer_dirs = 1;
1933         }
1934
1935         if (argc < 2 && !read_batch && !am_server)
1936                 list_only |= 1;
1937
1938         if (xfer_dirs >= 4) {
1939                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
1940                 recurse = xfer_dirs = 1;
1941         } else if (recurse)
1942                 xfer_dirs = 1;
1943         else if (xfer_dirs < 0)
1944                 xfer_dirs = list_only ? 1 : 0;
1945
1946         if (relative_paths < 0)
1947                 relative_paths = files_from? 1 : 0;
1948         if (!relative_paths)
1949                 implied_dirs = 0;
1950
1951         if (delete_before + !!delete_during + delete_after > 1) {
1952                 snprintf(err_buf, sizeof err_buf,
1953                         "You may not combine multiple --delete-WHEN options.\n");
1954                 return 0;
1955         }
1956         if (delete_before || delete_during || delete_after)
1957                 delete_mode = 1;
1958         else if (delete_mode || delete_excluded) {
1959                 /* Only choose now between before & during if one is refused. */
1960                 if (refused_delete_before) {
1961                         if (!refused_delete_during)
1962                                 delete_during = 1;
1963                         else {
1964                                 create_refuse_error(refused_delete_before);
1965                                 return 0;
1966                         }
1967                 } else if (refused_delete_during)
1968                         delete_before = 1;
1969                 delete_mode = 1;
1970         }
1971         if (!xfer_dirs && delete_mode) {
1972                 snprintf(err_buf, sizeof err_buf,
1973                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
1974                 return 0;
1975         }
1976
1977         if (missing_args == 3) /* simplify if both options were specified */
1978                 missing_args = 2;
1979         if (refused_delete && (delete_mode || missing_args == 2)) {
1980                 create_refuse_error(refused_delete);
1981                 return 0;
1982         }
1983
1984         if (remove_source_files) {
1985                 /* We only want to infer this refusal of --remove-source-files
1986                  * via the refusal of "delete", not any of the "delete-FOO"
1987                  * options. */
1988                 if (refused_delete && am_sender) {
1989                         create_refuse_error(refused_delete);
1990                         return 0;
1991                 }
1992                 need_messages_from_generator = 1;
1993         }
1994
1995         if (munge_symlinks && !am_daemon) {
1996                 STRUCT_STAT st;
1997                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
1998                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
1999                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2000                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2001                                 prefix);
2002                         exit_cleanup(RERR_UNSUPPORTED);
2003                 }
2004         }
2005
2006         if (sanitize_paths) {
2007                 int i;
2008                 for (i = argc; i-- > 0; )
2009                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2010                 if (tmpdir)
2011                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2012                 if (backup_dir)
2013                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2014         }
2015         if (daemon_filter_list.head && !am_sender) {
2016                 filter_rule_list *elp = &daemon_filter_list;
2017                 if (tmpdir) {
2018                         char *dir;
2019                         if (!*tmpdir)
2020                                 goto options_rejected;
2021                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2022                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2023                         if (check_filter(elp, FLOG, dir, 1) < 0)
2024                                 goto options_rejected;
2025                 }
2026                 if (backup_dir) {
2027                         char *dir;
2028                         if (!*backup_dir)
2029                                 goto options_rejected;
2030                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2031                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2032                         if (check_filter(elp, FLOG, dir, 1) < 0)
2033                                 goto options_rejected;
2034                 }
2035         }
2036
2037         if (!backup_suffix)
2038                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2039         backup_suffix_len = strlen(backup_suffix);
2040         if (strchr(backup_suffix, '/') != NULL) {
2041                 snprintf(err_buf, sizeof err_buf,
2042                         "--suffix cannot contain slashes: %s\n",
2043                         backup_suffix);
2044                 return 0;
2045         }
2046         if (backup_dir) {
2047                 size_t len;
2048                 while (*backup_dir == '.' && backup_dir[1] == '/')
2049                         backup_dir += 2;
2050                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2051                         backup_dir++;
2052                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2053                 if (len > sizeof backup_dir_buf - 128) {
2054                         snprintf(err_buf, sizeof err_buf,
2055                                 "the --backup-dir path is WAY too long.\n");
2056                         return 0;
2057                 }
2058                 backup_dir_len = (int)len;
2059                 if (!backup_dir_len) {
2060                         backup_dir_len = -1;
2061                         backup_dir = NULL;
2062                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2063                         backup_dir_buf[backup_dir_len++] = '/';
2064                         backup_dir_buf[backup_dir_len] = '\0';
2065                 }
2066                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2067         }
2068         if (backup_dir) {
2069                 /* No need for a suffix or a protect rule. */
2070         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2071                 snprintf(err_buf, sizeof err_buf,
2072                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2073                         ? "when --backup-dir is the same as the dest dir"
2074                         : "without a --backup-dir");
2075                 return 0;
2076         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2077                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2078                         "P *%s", backup_suffix);
2079                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2080         }
2081
2082         if (preserve_times) {
2083                 preserve_times = PRESERVE_FILE_TIMES;
2084                 if (!omit_dir_times)
2085                         preserve_times |= PRESERVE_DIR_TIMES;
2086 #ifdef CAN_SET_SYMLINK_TIMES
2087                 if (!omit_link_times)
2088                         preserve_times |= PRESERVE_LINK_TIMES;
2089 #endif
2090         }
2091
2092         if (make_backups && !backup_dir) {
2093                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2094                 preserve_times &= ~PRESERVE_DIR_TIMES;
2095         }
2096
2097         if (stdout_format) {
2098                 if (am_server && log_format_has(stdout_format, 'I'))
2099                         stdout_format_has_i = 2;
2100                 else if (log_format_has(stdout_format, 'i'))
2101                         stdout_format_has_i = itemize_changes | 1;
2102                 if (!log_format_has(stdout_format, 'b')
2103                  && !log_format_has(stdout_format, 'c')
2104                  && !log_format_has(stdout_format, 'C'))
2105                         log_before_transfer = !am_server;
2106         } else if (itemize_changes) {
2107                 stdout_format = "%i %n%L";
2108                 stdout_format_has_i = itemize_changes;
2109                 log_before_transfer = !am_server;
2110         }
2111
2112         if (do_progress && !am_server) {
2113                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2114                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2115                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2116         }
2117
2118         if (dry_run)
2119                 do_xfers = 0;
2120
2121         set_io_timeout(io_timeout);
2122
2123         if (INFO_GTE(NAME, 1) && !stdout_format) {
2124                 stdout_format = "%n%L";
2125                 log_before_transfer = !am_server;
2126         }
2127         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2128                 stdout_format_has_o_or_i = 1;
2129
2130         if (logfile_name && !am_daemon) {
2131                 if (!logfile_format) {
2132                         logfile_format = "%i %n%L";
2133                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2134                 } else {
2135                         if (log_format_has(logfile_format, 'i'))
2136                                 logfile_format_has_i = 1;
2137                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2138                                 logfile_format_has_o_or_i = 1;
2139                 }
2140                 log_init(0);
2141         } else if (!am_daemon)
2142                 logfile_format = NULL;
2143
2144         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2145                 bwlimit = daemon_bwlimit;
2146         if (bwlimit) {
2147                 bwlimit_writemax = (size_t)bwlimit * 128;
2148                 if (bwlimit_writemax < 512)
2149                         bwlimit_writemax = 512;
2150         }
2151
2152         if (sparse_files && inplace) {
2153                 /* Note: we don't check for this below, because --append is
2154                  * OK with --sparse (as long as redos are handled right). */
2155                 snprintf(err_buf, sizeof err_buf,
2156                          "--sparse cannot be used with --inplace\n");
2157                 return 0;
2158         }
2159
2160         if (append_mode) {
2161                 if (whole_file > 0) {
2162                         snprintf(err_buf, sizeof err_buf,
2163                                  "--append cannot be used with --whole-file\n");
2164                         return 0;
2165                 }
2166                 if (refused_inplace) {
2167                         create_refuse_error(refused_inplace);
2168                         return 0;
2169                 }
2170                 inplace = 1;
2171         }
2172
2173         if (delay_updates && !partial_dir)
2174                 partial_dir = tmp_partialdir;
2175
2176         if (inplace) {
2177 #ifdef HAVE_FTRUNCATE
2178                 if (partial_dir) {
2179                         snprintf(err_buf, sizeof err_buf,
2180                                  "--%s cannot be used with --%s\n",
2181                                  append_mode ? "append" : "inplace",
2182                                  delay_updates ? "delay-updates" : "partial-dir");
2183                         return 0;
2184                 }
2185                 /* --inplace implies --partial for refusal purposes, but we
2186                  * clear the keep_partial flag for internal logic purposes. */
2187                 if (refused_partial) {
2188                         create_refuse_error(refused_partial);
2189                         return 0;
2190                 }
2191                 keep_partial = 0;
2192 #else
2193                 snprintf(err_buf, sizeof err_buf,
2194                          "--%s is not supported on this %s\n",
2195                          append_mode ? "append" : "inplace",
2196                          am_server ? "server" : "client");
2197                 return 0;
2198 #endif
2199         } else {
2200                 if (keep_partial && !partial_dir && !am_server) {
2201                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2202                                 partial_dir = strdup(arg);
2203                 }
2204                 if (partial_dir) {
2205                         if (*partial_dir)
2206                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2207                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2208                                 partial_dir = NULL;
2209                         if (!partial_dir && refused_partial) {
2210                                 create_refuse_error(refused_partial);
2211                                 return 0;
2212                         }
2213                         keep_partial = 1;
2214                 }
2215         }
2216
2217         if (files_from) {
2218                 char *h, *p;
2219                 int q;
2220                 if (argc > 2 || (!am_daemon && argc == 1)) {
2221                         usage(FERROR);
2222                         exit_cleanup(RERR_SYNTAX);
2223                 }
2224                 if (strcmp(files_from, "-") == 0) {
2225                         filesfrom_fd = 0;
2226                         if (am_server)
2227                                 filesfrom_host = ""; /* reading from socket */
2228                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2229                         if (am_server) {
2230                                 snprintf(err_buf, sizeof err_buf,
2231                                         "The --files-from sent to the server cannot specify a host.\n");
2232                                 return 0;
2233                         }
2234                         files_from = p;
2235                         filesfrom_host = h;
2236                         if (strcmp(files_from, "-") == 0) {
2237                                 snprintf(err_buf, sizeof err_buf,
2238                                         "Invalid --files-from remote filename\n");
2239                                 return 0;
2240                         }
2241                 } else {
2242                         if (sanitize_paths)
2243                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2244                         if (daemon_filter_list.head) {
2245                                 char *dir;
2246                                 if (!*files_from)
2247                                         goto options_rejected;
2248                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2249                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2250                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2251                                         goto options_rejected;
2252                         }
2253                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2254                         if (filesfrom_fd < 0) {
2255                                 snprintf(err_buf, sizeof err_buf,
2256                                         "failed to open files-from file %s: %s\n",
2257                                         files_from, strerror(errno));
2258                                 return 0;
2259                         }
2260                 }
2261         }
2262
2263         am_starting_up = 0;
2264
2265         return 1;
2266
2267   options_rejected:
2268         snprintf(err_buf, sizeof err_buf,
2269                 "Your options have been rejected by the server.\n");
2270         return 0;
2271 }
2272
2273
2274 /**
2275  * Construct a filtered list of options to pass through from the
2276  * client to the server.
2277  *
2278  * This involves setting options that will tell the server how to
2279  * behave, and also filtering out options that are processed only
2280  * locally.
2281  **/
2282 void server_options(char **args, int *argc_p)
2283 {
2284         static char argstr[64];
2285         int ac = *argc_p;
2286         uchar where;
2287         char *arg;
2288         int i, x;
2289
2290         /* This should always remain first on the server's command-line. */
2291         args[ac++] = "--server";
2292
2293         if (daemon_over_rsh > 0) {
2294                 args[ac++] = "--daemon";
2295                 *argc_p = ac;
2296                 /* if we're passing --daemon, we're done */
2297                 return;
2298         }
2299
2300         if (!am_sender)
2301                 args[ac++] = "--sender";
2302
2303         x = 1;
2304         argstr[0] = '-';
2305
2306         if (protect_args)
2307                 argstr[x++] = 's';
2308
2309         for (i = 0; i < verbose; i++)
2310                 argstr[x++] = 'v';
2311
2312         /* the -q option is intentionally left out */
2313         if (make_backups)
2314                 argstr[x++] = 'b';
2315         if (update_only)
2316                 argstr[x++] = 'u';
2317         if (!do_xfers) /* Note: NOT "dry_run"! */
2318                 argstr[x++] = 'n';
2319         if (preserve_links)
2320                 argstr[x++] = 'l';
2321         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2322          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2323                 argstr[x++] = 'd';
2324         if (am_sender) {
2325                 if (keep_dirlinks)
2326                         argstr[x++] = 'K';
2327                 if (prune_empty_dirs)
2328                         argstr[x++] = 'm';
2329                 if (omit_dir_times)
2330                         argstr[x++] = 'O';
2331                 if (omit_link_times)
2332                         argstr[x++] = 'J';
2333         } else {
2334                 if (copy_links)
2335                         argstr[x++] = 'L';
2336                 if (copy_dirlinks)
2337                         argstr[x++] = 'k';
2338         }
2339
2340         if (whole_file > 0)
2341                 argstr[x++] = 'W';
2342         /* We don't need to send --no-whole-file, because it's the
2343          * default for remote transfers, and in any case old versions
2344          * of rsync will not understand it. */
2345
2346         if (preserve_hard_links) {
2347                 argstr[x++] = 'H';
2348                 if (preserve_hard_links > 1)
2349                         argstr[x++] = 'H';
2350         }
2351         if (preserve_uid)
2352                 argstr[x++] = 'o';
2353         if (preserve_gid)
2354                 argstr[x++] = 'g';
2355         if (preserve_devices) /* ignore preserve_specials here */
2356                 argstr[x++] = 'D';
2357         if (preserve_times)
2358                 argstr[x++] = 't';
2359         if (preserve_perms)
2360                 argstr[x++] = 'p';
2361         else if (preserve_executability && am_sender)
2362                 argstr[x++] = 'E';
2363 #ifdef SUPPORT_ACLS
2364         if (preserve_acls)
2365                 argstr[x++] = 'A';
2366 #endif
2367 #ifdef SUPPORT_XATTRS
2368         if (preserve_xattrs) {
2369                 argstr[x++] = 'X';
2370                 if (preserve_xattrs > 1)
2371                         argstr[x++] = 'X';
2372         }
2373 #endif
2374         if (recurse)
2375                 argstr[x++] = 'r';
2376         if (always_checksum)
2377                 argstr[x++] = 'c';
2378         if (cvs_exclude)
2379                 argstr[x++] = 'C';
2380         if (ignore_times)
2381                 argstr[x++] = 'I';
2382         if (relative_paths)
2383                 argstr[x++] = 'R';
2384         if (one_file_system) {
2385                 argstr[x++] = 'x';
2386                 if (one_file_system > 1)
2387                         argstr[x++] = 'x';
2388         }
2389         if (sparse_files)
2390                 argstr[x++] = 'S';
2391         if (do_compression)
2392                 argstr[x++] = 'z';
2393
2394         set_allow_inc_recurse();
2395
2396         /* Checking the pre-negotiated value allows --protocol=29 override. */
2397         if (protocol_version >= 30) {
2398                 /* We make use of the -e option to let the server know about
2399                  * any pre-release protocol version && some behavior flags. */
2400                 argstr[x++] = 'e';
2401 #if SUBPROTOCOL_VERSION != 0
2402                 if (protocol_version == PROTOCOL_VERSION) {
2403                         x += snprintf(argstr+x, sizeof argstr - x,
2404                                       "%d.%d",
2405                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2406                 } else
2407 #endif
2408                         argstr[x++] = '.';
2409                 if (allow_inc_recurse)
2410                         argstr[x++] = 'i';
2411 #ifdef CAN_SET_SYMLINK_TIMES
2412                 argstr[x++] = 'L';
2413 #endif
2414 #ifdef ICONV_OPTION
2415                 argstr[x++] = 's';
2416 #endif
2417         }
2418
2419         if (x >= (int)sizeof argstr) { /* Not possible... */
2420                 rprintf(FERROR, "argstr overflow in server_options().\n");
2421                 exit_cleanup(RERR_MALLOC);
2422         }
2423
2424         argstr[x] = '\0';
2425
2426         if (x > 1)
2427                 args[ac++] = argstr;
2428
2429 #ifdef ICONV_OPTION
2430         if (iconv_opt) {
2431                 char *set = strchr(iconv_opt, ',');
2432                 if (set)
2433                         set++;
2434                 else
2435                         set = iconv_opt;
2436                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2437                         goto oom;
2438                 args[ac++] = arg;
2439         }
2440 #endif
2441
2442         if (protect_args && !local_server) /* unprotected args stop here */
2443                 args[ac++] = NULL;
2444
2445         if (list_only > 1)
2446                 args[ac++] = "--list-only";
2447
2448         /* This makes sure that the remote rsync can handle deleting with -d
2449          * sans -r because the --no-r option was added at the same time. */
2450         if (xfer_dirs && !recurse && delete_mode && am_sender)
2451                 args[ac++] = "--no-r";
2452
2453         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2454                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2455                         goto oom;
2456                 args[ac++] = arg;
2457         }
2458
2459         if (preserve_devices) {
2460                 /* Note: sending "--devices" would not be backward-compatible. */
2461                 if (!preserve_specials)
2462                         args[ac++] = "--no-specials"; /* -D is already set. */
2463         } else if (preserve_specials)
2464                 args[ac++] = "--specials";
2465
2466         /* The server side doesn't use our log-format, but in certain
2467          * circumstances they need to know a little about the option. */
2468         if (stdout_format && am_sender) {
2469                 /* Use --log-format, not --out-format, for compatibility. */
2470                 if (stdout_format_has_i > 1)
2471                         args[ac++] = "--log-format=%i%I";
2472                 else if (stdout_format_has_i)
2473                         args[ac++] = "--log-format=%i";
2474                 else if (stdout_format_has_o_or_i)
2475                         args[ac++] = "--log-format=%o";
2476                 else if (!verbose)
2477                         args[ac++] = "--log-format=X";
2478         }
2479
2480         if (block_size) {
2481                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2482                         goto oom;
2483                 args[ac++] = arg;
2484         }
2485
2486         if (io_timeout) {
2487                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2488                         goto oom;
2489                 args[ac++] = arg;
2490         }
2491
2492         if (bwlimit) {
2493                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2494                         goto oom;
2495                 args[ac++] = arg;
2496         }
2497
2498         if (backup_dir) {
2499                 args[ac++] = "--backup-dir";
2500                 args[ac++] = backup_dir;
2501         }
2502
2503         /* Only send --suffix if it specifies a non-default value. */
2504         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2505                 /* We use the following syntax to avoid weirdness with '~'. */
2506                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2507                         goto oom;
2508                 args[ac++] = arg;
2509         }
2510
2511         if (am_sender) {
2512                 if (max_delete > 0) {
2513                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2514                                 goto oom;
2515                         args[ac++] = arg;
2516                 } else if (max_delete == 0)
2517                         args[ac++] = "--max-delete=-1";
2518                 if (min_size) {
2519                         args[ac++] = "--min-size";
2520                         args[ac++] = min_size_arg;
2521                 }
2522                 if (max_size) {
2523                         args[ac++] = "--max-size";
2524                         args[ac++] = max_size_arg;
2525                 }
2526                 if (delete_before)
2527                         args[ac++] = "--delete-before";
2528                 else if (delete_during == 2)
2529                         args[ac++] = "--delete-delay";
2530                 else if (delete_during)
2531                         args[ac++] = "--delete-during";
2532                 else if (delete_after)
2533                         args[ac++] = "--delete-after";
2534                 else if (delete_mode && !delete_excluded)
2535                         args[ac++] = "--delete";
2536                 if (delete_excluded)
2537                         args[ac++] = "--delete-excluded";
2538                 if (force_delete)
2539                         args[ac++] = "--force";
2540                 if (write_batch < 0)
2541                         args[ac++] = "--only-write-batch=X";
2542                 if (am_root > 1)
2543                         args[ac++] = "--super";
2544                 if (size_only)
2545                         args[ac++] = "--size-only";
2546                 if (do_stats)
2547                         args[ac++] = "--stats";
2548         } else {
2549                 if (skip_compress) {
2550                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2551                                 goto oom;
2552                         args[ac++] = arg;
2553                 }
2554         }
2555
2556         /* --delete-missing-args needs the cooperation of both sides, but
2557          * the sender can handle --ignore-missing-args by itself. */
2558         if (missing_args == 2)
2559                 args[ac++] = "--delete-missing-args";
2560         else if (missing_args == 1 && !am_sender)
2561                 args[ac++] = "--ignore-missing-args";
2562
2563         if (modify_window_set) {
2564                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
2565                         goto oom;
2566                 args[ac++] = arg;
2567         }
2568
2569         if (checksum_seed) {
2570                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2571                         goto oom;
2572                 args[ac++] = arg;
2573         }
2574
2575         if (partial_dir && am_sender) {
2576                 if (partial_dir != tmp_partialdir) {
2577                         args[ac++] = "--partial-dir";
2578                         args[ac++] = partial_dir;
2579                 }
2580                 if (delay_updates)
2581                         args[ac++] = "--delay-updates";
2582         } else if (keep_partial && am_sender)
2583                 args[ac++] = "--partial";
2584
2585         if (ignore_errors)
2586                 args[ac++] = "--ignore-errors";
2587
2588         if (copy_unsafe_links)
2589                 args[ac++] = "--copy-unsafe-links";
2590
2591         if (safe_symlinks)
2592                 args[ac++] = "--safe-links";
2593
2594         if (numeric_ids)
2595                 args[ac++] = "--numeric-ids";
2596
2597         if (use_qsort)
2598                 args[ac++] = "--use-qsort";
2599
2600         if (am_sender) {
2601                 if (usermap) {
2602                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2603                                 goto oom;
2604                         args[ac++] = arg;
2605                 }
2606
2607                 if (groupmap) {
2608                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2609                                 goto oom;
2610                         args[ac++] = arg;
2611                 }
2612
2613                 if (ignore_existing)
2614                         args[ac++] = "--ignore-existing";
2615
2616                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2617                 if (ignore_non_existing)
2618                         args[ac++] = "--existing";
2619
2620                 if (tmpdir) {
2621                         args[ac++] = "--temp-dir";
2622                         args[ac++] = tmpdir;
2623                 }
2624
2625                 if (basis_dir[0]) {
2626                         /* the server only needs this option if it is not the sender,
2627                          *   and it may be an older version that doesn't know this
2628                          *   option, so don't send it if client is the sender.
2629                          */
2630                         for (i = 0; i < basis_dir_cnt; i++) {
2631                                 args[ac++] = dest_option;
2632                                 args[ac++] = basis_dir[i];
2633                         }
2634                 }
2635         }
2636
2637         /* What flags do we need to send to the other side? */
2638         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2639         arg = make_output_option(info_words, info_levels, where);
2640         if (arg)
2641                 args[ac++] = arg;
2642
2643         arg = make_output_option(debug_words, debug_levels, where);
2644         if (arg)
2645                 args[ac++] = arg;
2646
2647         if (append_mode) {
2648                 if (append_mode > 1)
2649                         args[ac++] = "--append";
2650                 args[ac++] = "--append";
2651         } else if (inplace)
2652                 args[ac++] = "--inplace";
2653
2654         if (files_from && (!am_sender || filesfrom_host)) {
2655                 if (filesfrom_host) {
2656                         args[ac++] = "--files-from";
2657                         args[ac++] = files_from;
2658                         if (eol_nulls)
2659                                 args[ac++] = "--from0";
2660                 } else {
2661                         args[ac++] = "--files-from=-";
2662                         args[ac++] = "--from0";
2663                 }
2664                 if (!relative_paths)
2665                         args[ac++] = "--no-relative";
2666         }
2667         /* It's OK that this checks the upper-bound of the protocol_version. */
2668         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2669                 args[ac++] = "--no-implied-dirs";
2670
2671         if (fuzzy_basis && am_sender)
2672                 args[ac++] = "--fuzzy";
2673
2674         if (remove_source_files == 1)
2675                 args[ac++] = "--remove-source-files";
2676         else if (remove_source_files)
2677                 args[ac++] = "--remove-sent-files";
2678
2679         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2680                 rprintf(FERROR, "argc overflow in server_options().\n");
2681                 exit_cleanup(RERR_MALLOC);
2682         }
2683
2684         if (remote_option_cnt) {
2685                 int j;
2686                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2687                         rprintf(FERROR, "too many remote options specified.\n");
2688                         exit_cleanup(RERR_SYNTAX);
2689                 }
2690                 for (j = 1; j <= remote_option_cnt; j++)
2691                         args[ac++] = (char*)remote_options[j];
2692         }
2693
2694         *argc_p = ac;
2695         return;
2696
2697     oom:
2698         out_of_memory("server_options");
2699 }
2700
2701 /* If str points to a valid hostspec, return allocated memory containing the
2702  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2703  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2704  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2705  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2706  * (required for parsing) [ and ] chars elided from the returned string. */
2707 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2708 {
2709         char *s, *host_start = str;
2710         int hostlen = 0, userlen = 0;
2711         char *ret;
2712
2713         for (s = str; ; s++) {
2714                 if (!*s) {
2715                         /* It is only OK if we run out of string with rsync:// */
2716                         if (!port_ptr)
2717                                 return NULL;
2718                         if (!hostlen)
2719                                 hostlen = s - host_start;
2720                         break;
2721                 }
2722                 if (*s == ':' || *s == '/') {
2723                         if (!hostlen)
2724                                 hostlen = s - host_start;
2725                         if (*s++ == '/') {
2726                                 if (!port_ptr)
2727                                         return NULL;
2728                         } else if (port_ptr) {
2729                                 *port_ptr = atoi(s);
2730                                 while (isDigit(s)) s++;
2731                                 if (*s && *s++ != '/')
2732                                         return NULL;
2733                         }
2734                         break;
2735                 }
2736                 if (*s == '@') {
2737                         userlen = s - str + 1;
2738                         host_start = s + 1;
2739                 } else if (*s == '[') {
2740                         if (s != host_start++)
2741                                 return NULL;
2742                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2743                         hostlen = s - host_start;
2744                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2745                                 return NULL;
2746                 }
2747         }
2748
2749         *path_start_ptr = s;
2750         ret = new_array(char, userlen + hostlen + 1);
2751         if (userlen)
2752                 strlcpy(ret, str, userlen + 1);
2753         strlcpy(ret + userlen, host_start, hostlen + 1);
2754         return ret;
2755 }
2756
2757 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2758  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2759  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2760  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2761  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2762  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2763  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2764 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2765 {
2766         char *path;
2767
2768         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2769                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2770                 if (*host_ptr) {
2771                         if (!*port_ptr)
2772                                 *port_ptr = RSYNC_PORT;
2773                         return path;
2774                 }
2775         }
2776
2777         *host_ptr = parse_hostspec(s, &path, NULL);
2778         if (!*host_ptr)
2779                 return NULL;
2780
2781         if (*path == ':') {
2782                 if (port_ptr && !*port_ptr)
2783                         *port_ptr = RSYNC_PORT;
2784                 return path + 1;
2785         }
2786         if (port_ptr)
2787                 *port_ptr = 0;
2788
2789         return path;
2790 }