Commit | Line | Data |
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0f78b815 | 1 | /* |
d1f83bcc | 2 | * Compatibility routines for older rsync protocol versions. |
0f78b815 WD |
3 | * |
4 | * Copyright (C) Andrew Tridgell 1996 | |
5 | * Copyright (C) Paul Mackerras 1996 | |
b3bf9b9d | 6 | * Copyright (C) 2004-2009 Wayne Davison |
0f78b815 WD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
8e41b68e WD |
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. | |
0f78b815 WD |
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 | * | |
e7c67065 | 18 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
0f78b815 | 20 | */ |
4fe159a8 AT |
21 | |
22 | #include "rsync.h" | |
23 | ||
8a9709de | 24 | int remote_protocol = 0; |
99a957d3 | 25 | int file_extra_cnt = 0; /* count of file-list extras that everyone gets */ |
3ea6e0e7 | 26 | int inc_recurse = 0; |
de6ab501 | 27 | int use_safe_inc_flist = 0; |
8a9709de | 28 | |
aae43eb3 | 29 | extern int am_server; |
771d0add | 30 | extern int am_sender; |
d0c59b0e | 31 | extern int local_server; |
57b12568 | 32 | extern int inplace; |
e4b619b4 | 33 | extern int recurse; |
c8e83946 | 34 | extern int use_qsort; |
5275029d | 35 | extern int allow_inc_recurse; |
77502cba | 36 | extern int append_mode; |
e461b9be | 37 | extern int fuzzy_basis; |
b9f592fb | 38 | extern int read_batch; |
e4b619b4 | 39 | extern int delay_updates; |
aae43eb3 | 40 | extern int checksum_seed; |
57b12568 | 41 | extern int basis_dir_cnt; |
a1cc199b | 42 | extern int prune_empty_dirs; |
8a9709de | 43 | extern int protocol_version; |
5688c74d | 44 | extern int protect_args; |
99a957d3 WD |
45 | extern int preserve_uid; |
46 | extern int preserve_gid; | |
1c3344a1 | 47 | extern int preserve_acls; |
16edf865 | 48 | extern int preserve_xattrs; |
e4b619b4 WD |
49 | extern int need_messages_from_generator; |
50 | extern int delete_mode, delete_before, delete_during, delete_after; | |
1ed56a05 | 51 | extern char *shell_cmd; |
c1289508 | 52 | extern char *partial_dir; |
57b12568 | 53 | extern char *dest_option; |
5688c74d WD |
54 | extern char *files_from; |
55 | extern char *filesfrom_host; | |
7b6c5c77 | 56 | extern filter_rule_list filter_list; |
f7a76b9c | 57 | extern int need_unsorted_flist; |
5688c74d | 58 | #ifdef ICONV_OPTION |
5688c74d | 59 | extern iconv_t ic_send, ic_recv; |
91fd15b8 | 60 | extern char *iconv_opt; |
5688c74d | 61 | #endif |
4fe159a8 | 62 | |
9742b386 | 63 | /* These index values are for the file-list's extra-attribute array. */ |
f7a76b9c | 64 | int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx; |
5688c74d | 65 | |
1ed56a05 | 66 | int receiver_symlink_times = 0; /* receiver can set the time on a symlink */ |
91fd15b8 | 67 | int sender_symlink_iconv = 0; /* sender should convert symlink content */ |
1ed56a05 | 68 | |
f7a76b9c | 69 | #ifdef ICONV_OPTION |
5688c74d WD |
70 | int filesfrom_convert = 0; |
71 | #endif | |
9742b386 | 72 | |
1ed56a05 WD |
73 | #define CF_INC_RECURSE (1<<0) |
74 | #define CF_SYMLINK_TIMES (1<<1) | |
91fd15b8 | 75 | #define CF_SYMLINK_ICONV (1<<2) |
de6ab501 | 76 | #define CF_SAFE_FLIST (1<<3) |
1ed56a05 WD |
77 | |
78 | static const char *client_info; | |
79 | ||
486f8cd1 WD |
80 | /* The server makes sure that if either side only supports a pre-release |
81 | * version of a protocol, that both sides must speak a compatible version | |
82 | * of that protocol for it to be advertised as available. */ | |
83 | static void check_sub_protocol(void) | |
84 | { | |
85 | char *dot; | |
86 | int their_protocol, their_sub; | |
ac593860 | 87 | #if SUBPROTOCOL_VERSION != 0 |
486f8cd1 | 88 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; |
ac593860 WD |
89 | #else |
90 | int our_sub = 0; | |
91 | #endif | |
486f8cd1 | 92 | |
1ed56a05 WD |
93 | /* client_info starts with VER.SUB string if client is a pre-release. */ |
94 | if (!(their_protocol = atoi(client_info)) | |
95 | || !(dot = strchr(client_info, '.')) | |
486f8cd1 | 96 | || !(their_sub = atoi(dot+1))) { |
ac593860 | 97 | #if SUBPROTOCOL_VERSION != 0 |
486f8cd1 WD |
98 | if (our_sub) |
99 | protocol_version--; | |
ac593860 | 100 | #endif |
486f8cd1 WD |
101 | return; |
102 | } | |
103 | ||
104 | if (their_protocol < protocol_version) { | |
105 | if (their_sub) | |
106 | protocol_version = their_protocol - 1; | |
107 | return; | |
108 | } | |
109 | ||
110 | if (their_protocol > protocol_version) | |
ac593860 | 111 | their_sub = 0; /* 0 == final version of older protocol */ |
486f8cd1 WD |
112 | if (their_sub != our_sub) |
113 | protocol_version--; | |
114 | } | |
115 | ||
9970bed4 WD |
116 | void set_allow_inc_recurse(void) |
117 | { | |
1ed56a05 WD |
118 | client_info = shell_cmd ? shell_cmd : ""; |
119 | ||
aabb50d4 WD |
120 | if (!recurse || use_qsort) |
121 | allow_inc_recurse = 0; | |
122 | else if (!am_sender | |
123 | && (delete_before || delete_after | |
124 | || delay_updates || prune_empty_dirs)) | |
9970bed4 WD |
125 | allow_inc_recurse = 0; |
126 | else if (am_server && !local_server | |
1ed56a05 | 127 | && (strchr(client_info, 'i') == NULL)) |
9970bed4 WD |
128 | allow_inc_recurse = 0; |
129 | } | |
130 | ||
aae43eb3 | 131 | void setup_protocol(int f_out,int f_in) |
4fe159a8 | 132 | { |
6eee13cf | 133 | if (am_sender) |
bc5df0f4 | 134 | file_extra_cnt += PTR_EXTRA_CNT; |
6eee13cf | 135 | else |
99a957d3 | 136 | file_extra_cnt++; |
6eee13cf | 137 | if (preserve_uid) |
9742b386 | 138 | uid_ndx = ++file_extra_cnt; |
6eee13cf | 139 | if (preserve_gid) |
9742b386 | 140 | gid_ndx = ++file_extra_cnt; |
1c3344a1 | 141 | if (preserve_acls && !am_sender) |
9742b386 | 142 | acls_ndx = ++file_extra_cnt; |
16edf865 | 143 | if (preserve_xattrs) |
9742b386 | 144 | xattrs_ndx = ++file_extra_cnt; |
6eee13cf | 145 | |
9970bed4 WD |
146 | if (am_server) |
147 | set_allow_inc_recurse(); | |
148 | ||
8a9709de | 149 | if (remote_protocol == 0) { |
486f8cd1 WD |
150 | if (am_server && !local_server) |
151 | check_sub_protocol(); | |
aa434321 | 152 | if (!read_batch) |
8a9709de | 153 | write_int(f_out, protocol_version); |
aa434321 | 154 | remote_protocol = read_int(f_in); |
8a9709de WD |
155 | if (protocol_version > remote_protocol) |
156 | protocol_version = remote_protocol; | |
13c5fc0e | 157 | } |
b9f592fb | 158 | if (read_batch && remote_protocol > protocol_version) { |
486f8cd1 | 159 | rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n", |
b9f592fb WD |
160 | remote_protocol, protocol_version); |
161 | exit_cleanup(RERR_PROTOCOL); | |
162 | } | |
aae43eb3 | 163 | |
951e826b | 164 | if (DEBUG_GTE(PROTO, 1)) { |
8a9709de WD |
165 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", |
166 | am_server? "Server" : "Client", remote_protocol, protocol_version); | |
167 | } | |
168 | if (remote_protocol < MIN_PROTOCOL_VERSION | |
169 | || remote_protocol > MAX_PROTOCOL_VERSION) { | |
4ccfd96c | 170 | rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n"); |
d310a212 | 171 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
65417579 | 172 | exit_cleanup(RERR_PROTOCOL); |
8a9709de WD |
173 | } |
174 | if (remote_protocol < OLD_PROTOCOL_VERSION) { | |
1b2db7ae | 175 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
8a9709de WD |
176 | am_server? "Client" : "Server"); |
177 | } | |
178 | if (protocol_version < MIN_PROTOCOL_VERSION) { | |
179 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", | |
180 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
181 | exit_cleanup(RERR_PROTOCOL); | |
182 | } | |
183 | if (protocol_version > PROTOCOL_VERSION) { | |
184 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", | |
185 | PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
186 | exit_cleanup(RERR_PROTOCOL); | |
187 | } | |
a7c1fa00 WD |
188 | if (read_batch) |
189 | check_batch_flags(); | |
1b2db7ae | 190 | |
771d0add | 191 | if (protocol_version < 30) { |
77502cba WD |
192 | if (append_mode == 1) |
193 | append_mode = 2; | |
01894cf0 | 194 | if (preserve_acls && !local_server) { |
1c3344a1 WD |
195 | rprintf(FERROR, |
196 | "--acls requires protocol 30 or higher" | |
197 | " (negotiated %d).\n", | |
198 | protocol_version); | |
199 | exit_cleanup(RERR_PROTOCOL); | |
200 | } | |
01894cf0 | 201 | if (preserve_xattrs && !local_server) { |
16edf865 WD |
202 | rprintf(FERROR, |
203 | "--xattrs requires protocol 30 or higher" | |
204 | " (negotiated %d).\n", | |
205 | protocol_version); | |
206 | exit_cleanup(RERR_PROTOCOL); | |
207 | } | |
771d0add WD |
208 | } |
209 | ||
e4b619b4 WD |
210 | if (delete_mode && !(delete_before+delete_during+delete_after)) { |
211 | if (protocol_version < 30) | |
212 | delete_before = 1; | |
213 | else | |
214 | delete_during = 1; | |
215 | } | |
216 | ||
a1cc199b WD |
217 | if (protocol_version < 29) { |
218 | if (fuzzy_basis) { | |
219 | rprintf(FERROR, | |
220 | "--fuzzy requires protocol 29 or higher" | |
221 | " (negotiated %d).\n", | |
222 | protocol_version); | |
223 | exit_cleanup(RERR_PROTOCOL); | |
224 | } | |
e461b9be | 225 | |
a1cc199b WD |
226 | if (basis_dir_cnt && inplace) { |
227 | rprintf(FERROR, | |
228 | "%s with --inplace requires protocol 29 or higher" | |
229 | " (negotiated %d).\n", | |
230 | dest_option, protocol_version); | |
231 | exit_cleanup(RERR_PROTOCOL); | |
232 | } | |
57b12568 | 233 | |
a1cc199b WD |
234 | if (basis_dir_cnt > 1) { |
235 | rprintf(FERROR, | |
236 | "Using more than one %s option requires protocol" | |
237 | " 29 or higher (negotiated %d).\n", | |
238 | dest_option, protocol_version); | |
239 | exit_cleanup(RERR_PROTOCOL); | |
240 | } | |
241 | ||
242 | if (prune_empty_dirs) { | |
243 | rprintf(FERROR, | |
244 | "--prune-empty-dirs requires protocol 29 or higher" | |
245 | " (negotiated %d).\n", | |
246 | protocol_version); | |
247 | exit_cleanup(RERR_PROTOCOL); | |
248 | } | |
e4b619b4 | 249 | } else if (protocol_version >= 30) { |
1ed56a05 | 250 | int compat_flags; |
9970bed4 | 251 | if (am_server) { |
1ed56a05 | 252 | compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0; |
accc091f | 253 | #ifdef CAN_SET_SYMLINK_TIMES |
1ed56a05 | 254 | compat_flags |= CF_SYMLINK_TIMES; |
91fd15b8 WD |
255 | #endif |
256 | #ifdef ICONV_OPTION | |
257 | compat_flags |= CF_SYMLINK_ICONV; | |
1ed56a05 | 258 | #endif |
de6ab501 WD |
259 | if (local_server || strchr(client_info, 'f') != NULL) |
260 | compat_flags |= CF_SAFE_FLIST; | |
1ed56a05 | 261 | write_byte(f_out, compat_flags); |
de6ab501 | 262 | } else |
1ed56a05 WD |
263 | compat_flags = read_byte(f_in); |
264 | /* The inc_recurse var MUST be set to 0 or 1. */ | |
265 | inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0; | |
266 | if (am_sender) { | |
267 | receiver_symlink_times = am_server | |
268 | ? strchr(client_info, 'L') != NULL | |
269 | : !!(compat_flags & CF_SYMLINK_TIMES); | |
270 | } | |
accc091f | 271 | #ifdef CAN_SET_SYMLINK_TIMES |
1ed56a05 WD |
272 | else |
273 | receiver_symlink_times = 1; | |
91fd15b8 WD |
274 | #endif |
275 | #ifdef ICONV_OPTION | |
276 | sender_symlink_iconv = iconv_opt && (am_server | |
eecc969e | 277 | ? local_server || strchr(client_info, 's') != NULL |
91fd15b8 | 278 | : !!(compat_flags & CF_SYMLINK_ICONV)); |
1ed56a05 | 279 | #endif |
9970bed4 WD |
280 | if (inc_recurse && !allow_inc_recurse) { |
281 | /* This should only be able to happen in a batch. */ | |
282 | fprintf(stderr, | |
283 | "Incompatible options specified for inc-recursive %s.\n", | |
52d9a554 | 284 | read_batch ? "batch file" : "connection"); |
9970bed4 WD |
285 | exit_cleanup(RERR_SYNTAX); |
286 | } | |
de6ab501 | 287 | use_safe_inc_flist = (compat_flags & CF_SAFE_FLIST) || protocol_version >= 31; |
e4b619b4 | 288 | need_messages_from_generator = 1; |
accc091f | 289 | #ifdef CAN_SET_SYMLINK_TIMES |
1ed9018e WD |
290 | } else if (!am_sender) { |
291 | receiver_symlink_times = 1; | |
292 | #endif | |
57b12568 WD |
293 | } |
294 | ||
f7a76b9c WD |
295 | if (need_unsorted_flist && (!am_sender || inc_recurse)) |
296 | unsort_ndx = ++file_extra_cnt; | |
7820fa94 | 297 | |
d0c59b0e | 298 | if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) { |
b32d4254 | 299 | int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY; |
c1289508 | 300 | if (!am_sender || protocol_version >= 30) |
b32d4254 | 301 | rflags |= FILTRULE_PERISHABLE; |
c8fa85b2 | 302 | parse_filter_str(&filter_list, partial_dir, rule_template(rflags), 0); |
c1289508 WD |
303 | } |
304 | ||
5688c74d WD |
305 | |
306 | #ifdef ICONV_OPTION | |
307 | if (protect_args && files_from) { | |
308 | if (am_sender) | |
309 | filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1; | |
310 | else | |
311 | filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1; | |
312 | } | |
313 | #endif | |
314 | ||
bc63ae3f | 315 | if (am_server) { |
b1bf649c | 316 | if (!checksum_seed) |
13c5fc0e | 317 | checksum_seed = time(NULL); |
b1bf649c | 318 | write_int(f_out, checksum_seed); |
bc63ae3f S |
319 | } else { |
320 | checksum_seed = read_int(f_in); | |
13c5fc0e | 321 | } |
4fe159a8 | 322 | } |