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 | |
ba2133d6 | 6 | * Copyright (C) 2004-2007 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; |
8a9709de | 27 | |
b9f592fb | 28 | extern int verbose; |
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; |
79cd0c7f | 36 | extern int relative_paths; |
e461b9be | 37 | extern int fuzzy_basis; |
b9f592fb | 38 | extern int read_batch; |
771d0add | 39 | extern int max_delete; |
79cd0c7f | 40 | extern int implied_dirs; |
e4b619b4 | 41 | extern int delay_updates; |
aae43eb3 | 42 | extern int checksum_seed; |
57b12568 | 43 | extern int basis_dir_cnt; |
a1cc199b | 44 | extern int prune_empty_dirs; |
8a9709de | 45 | extern int protocol_version; |
99a957d3 WD |
46 | extern int preserve_uid; |
47 | extern int preserve_gid; | |
1c3344a1 | 48 | extern int preserve_acls; |
16edf865 | 49 | extern int preserve_xattrs; |
e4b619b4 WD |
50 | extern int preserve_hard_links; |
51 | extern int need_messages_from_generator; | |
52 | extern int delete_mode, delete_before, delete_during, delete_after; | |
c1289508 WD |
53 | extern int delete_excluded; |
54 | extern int make_backups; | |
486f8cd1 | 55 | extern char *shell_cmd; /* contains VER.SUB string if client is a pre-release */ |
c1289508 WD |
56 | extern char *backup_dir, *backup_suffix; |
57 | extern char *partial_dir; | |
57b12568 | 58 | extern char *dest_option; |
c1289508 | 59 | extern struct filter_list_struct filter_list; |
4fe159a8 | 60 | |
9742b386 WD |
61 | /* These index values are for the file-list's extra-attribute array. */ |
62 | int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx; | |
63 | ||
486f8cd1 WD |
64 | /* The server makes sure that if either side only supports a pre-release |
65 | * version of a protocol, that both sides must speak a compatible version | |
66 | * of that protocol for it to be advertised as available. */ | |
67 | static void check_sub_protocol(void) | |
68 | { | |
69 | char *dot; | |
70 | int their_protocol, their_sub; | |
71 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; | |
72 | ||
73 | if (!shell_cmd || !(dot = strchr(shell_cmd, '.')) | |
74 | || !(their_protocol = atoi(shell_cmd)) | |
75 | || !(their_sub = atoi(dot+1))) { | |
76 | if (our_sub) | |
77 | protocol_version--; | |
78 | return; | |
79 | } | |
80 | ||
81 | if (their_protocol < protocol_version) { | |
82 | if (their_sub) | |
83 | protocol_version = their_protocol - 1; | |
84 | return; | |
85 | } | |
86 | ||
87 | if (their_protocol > protocol_version) | |
88 | their_sub = 0; /* 0 == final version */ | |
89 | if (their_sub != our_sub) | |
90 | protocol_version--; | |
91 | } | |
92 | ||
aae43eb3 | 93 | void setup_protocol(int f_out,int f_in) |
4fe159a8 | 94 | { |
6eee13cf | 95 | if (am_sender) |
99a957d3 | 96 | file_extra_cnt += PTR_EXTRA_LEN; |
6eee13cf | 97 | else |
99a957d3 | 98 | file_extra_cnt++; |
6eee13cf | 99 | if (preserve_uid) |
9742b386 | 100 | uid_ndx = ++file_extra_cnt; |
6eee13cf | 101 | if (preserve_gid) |
9742b386 | 102 | gid_ndx = ++file_extra_cnt; |
1c3344a1 | 103 | if (preserve_acls && !am_sender) |
9742b386 | 104 | acls_ndx = ++file_extra_cnt; |
16edf865 | 105 | if (preserve_xattrs) |
9742b386 | 106 | xattrs_ndx = ++file_extra_cnt; |
6eee13cf | 107 | |
8a9709de | 108 | if (remote_protocol == 0) { |
486f8cd1 WD |
109 | if (am_server && !local_server) |
110 | check_sub_protocol(); | |
aa434321 | 111 | if (!read_batch) |
8a9709de | 112 | write_int(f_out, protocol_version); |
aa434321 | 113 | remote_protocol = read_int(f_in); |
8a9709de WD |
114 | if (protocol_version > remote_protocol) |
115 | protocol_version = remote_protocol; | |
13c5fc0e | 116 | } |
b9f592fb | 117 | if (read_batch && remote_protocol > protocol_version) { |
486f8cd1 | 118 | rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n", |
b9f592fb WD |
119 | remote_protocol, protocol_version); |
120 | exit_cleanup(RERR_PROTOCOL); | |
121 | } | |
aae43eb3 | 122 | |
8a9709de WD |
123 | if (verbose > 3) { |
124 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", | |
125 | am_server? "Server" : "Client", remote_protocol, protocol_version); | |
126 | } | |
127 | if (remote_protocol < MIN_PROTOCOL_VERSION | |
128 | || remote_protocol > MAX_PROTOCOL_VERSION) { | |
4ccfd96c | 129 | rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n"); |
d310a212 | 130 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
65417579 | 131 | exit_cleanup(RERR_PROTOCOL); |
8a9709de WD |
132 | } |
133 | if (remote_protocol < OLD_PROTOCOL_VERSION) { | |
1b2db7ae | 134 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
8a9709de WD |
135 | am_server? "Client" : "Server"); |
136 | } | |
137 | if (protocol_version < MIN_PROTOCOL_VERSION) { | |
138 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", | |
139 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
140 | exit_cleanup(RERR_PROTOCOL); | |
141 | } | |
142 | if (protocol_version > PROTOCOL_VERSION) { | |
143 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", | |
144 | PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
145 | exit_cleanup(RERR_PROTOCOL); | |
146 | } | |
1b2db7ae | 147 | |
771d0add WD |
148 | if (protocol_version < 30) { |
149 | if (max_delete == 0 && am_sender) { | |
150 | rprintf(FERROR, | |
151 | "--max-delete=0 requires protocol 30 or higher" | |
152 | " (negotiated %d).\n", | |
153 | protocol_version); | |
154 | exit_cleanup(RERR_PROTOCOL); | |
155 | } | |
01894cf0 | 156 | if (preserve_acls && !local_server) { |
1c3344a1 WD |
157 | rprintf(FERROR, |
158 | "--acls requires protocol 30 or higher" | |
159 | " (negotiated %d).\n", | |
160 | protocol_version); | |
161 | exit_cleanup(RERR_PROTOCOL); | |
162 | } | |
01894cf0 | 163 | if (preserve_xattrs && !local_server) { |
16edf865 WD |
164 | rprintf(FERROR, |
165 | "--xattrs requires protocol 30 or higher" | |
166 | " (negotiated %d).\n", | |
167 | protocol_version); | |
168 | exit_cleanup(RERR_PROTOCOL); | |
169 | } | |
771d0add WD |
170 | } |
171 | ||
e4b619b4 WD |
172 | if (delete_mode && !(delete_before+delete_during+delete_after)) { |
173 | if (protocol_version < 30) | |
174 | delete_before = 1; | |
175 | else | |
176 | delete_during = 1; | |
177 | } | |
178 | ||
a1cc199b WD |
179 | if (protocol_version < 29) { |
180 | if (fuzzy_basis) { | |
181 | rprintf(FERROR, | |
182 | "--fuzzy requires protocol 29 or higher" | |
183 | " (negotiated %d).\n", | |
184 | protocol_version); | |
185 | exit_cleanup(RERR_PROTOCOL); | |
186 | } | |
e461b9be | 187 | |
a1cc199b WD |
188 | if (basis_dir_cnt && inplace) { |
189 | rprintf(FERROR, | |
190 | "%s with --inplace requires protocol 29 or higher" | |
191 | " (negotiated %d).\n", | |
192 | dest_option, protocol_version); | |
193 | exit_cleanup(RERR_PROTOCOL); | |
194 | } | |
57b12568 | 195 | |
a1cc199b WD |
196 | if (basis_dir_cnt > 1) { |
197 | rprintf(FERROR, | |
198 | "Using more than one %s option requires protocol" | |
199 | " 29 or higher (negotiated %d).\n", | |
200 | dest_option, protocol_version); | |
201 | exit_cleanup(RERR_PROTOCOL); | |
202 | } | |
203 | ||
204 | if (prune_empty_dirs) { | |
205 | rprintf(FERROR, | |
206 | "--prune-empty-dirs requires protocol 29 or higher" | |
207 | " (negotiated %d).\n", | |
208 | protocol_version); | |
209 | exit_cleanup(RERR_PROTOCOL); | |
210 | } | |
e4b619b4 | 211 | } else if (protocol_version >= 30) { |
5275029d WD |
212 | if (recurse && allow_inc_recurse && !preserve_hard_links |
213 | && !delete_before && !delete_after && !delay_updates | |
79cd0c7f WD |
214 | && (!relative_paths || implied_dirs) && !use_qsort |
215 | && !prune_empty_dirs) | |
3ea6e0e7 | 216 | inc_recurse = 1; |
e4b619b4 | 217 | need_messages_from_generator = 1; |
57b12568 WD |
218 | } |
219 | ||
d0c59b0e | 220 | if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) { |
c1289508 WD |
221 | int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY; |
222 | if (!am_sender || protocol_version >= 30) | |
223 | flags |= MATCHFLG_PERISHABLE; | |
224 | parse_rule(&filter_list, partial_dir, flags, 0); | |
225 | } | |
226 | ||
bc63ae3f | 227 | if (am_server) { |
b1bf649c | 228 | if (!checksum_seed) |
13c5fc0e | 229 | checksum_seed = time(NULL); |
b1bf649c | 230 | write_int(f_out, checksum_seed); |
bc63ae3f S |
231 | } else { |
232 | checksum_seed = read_int(f_in); | |
13c5fc0e | 233 | } |
4fe159a8 | 234 | } |