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