2 * Compatibility routines for older rsync protocol versions.
4 * Copyright (C) Andrew Tridgell 1996
5 * Copyright (C) Paul Mackerras 1996
6 * Copyright (C) 2004-2007 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
24 int remote_protocol = 0;
25 int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
33 extern int fuzzy_basis;
34 extern int read_batch;
35 extern int max_delete;
36 extern int delay_updates;
37 extern int checksum_seed;
38 extern int basis_dir_cnt;
39 extern int prune_empty_dirs;
40 extern int protocol_version;
41 extern int preserve_uid;
42 extern int preserve_gid;
43 extern int preserve_hard_links;
44 extern int need_messages_from_generator;
45 extern int delete_mode, delete_before, delete_during, delete_after;
46 extern int delete_excluded;
47 extern int make_backups;
48 extern char *backup_dir, *backup_suffix;
49 extern char *partial_dir;
50 extern char *dest_option;
51 extern struct filter_list_struct filter_list;
53 void setup_protocol(int f_out,int f_in)
56 file_extra_cnt += PTR_EXTRA_LEN;
60 preserve_uid = ++file_extra_cnt;
62 preserve_gid = ++file_extra_cnt;
64 if (remote_protocol == 0) {
66 write_int(f_out, protocol_version);
67 remote_protocol = read_int(f_in);
68 if (protocol_version > remote_protocol)
69 protocol_version = remote_protocol;
71 if (read_batch && remote_protocol > protocol_version) {
72 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
73 remote_protocol, protocol_version);
74 exit_cleanup(RERR_PROTOCOL);
78 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
79 am_server? "Server" : "Client", remote_protocol, protocol_version);
81 if (remote_protocol < MIN_PROTOCOL_VERSION
82 || remote_protocol > MAX_PROTOCOL_VERSION) {
83 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
84 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
85 exit_cleanup(RERR_PROTOCOL);
87 if (remote_protocol < OLD_PROTOCOL_VERSION) {
88 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
89 am_server? "Client" : "Server");
91 if (protocol_version < MIN_PROTOCOL_VERSION) {
92 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
93 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
94 exit_cleanup(RERR_PROTOCOL);
96 if (protocol_version > PROTOCOL_VERSION) {
97 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
98 PROTOCOL_VERSION, am_server? "Server" : "Client");
99 exit_cleanup(RERR_PROTOCOL);
102 if (protocol_version < 30) {
103 if (max_delete == 0 && am_sender) {
105 "--max-delete=0 requires protocol 30 or higher"
106 " (negotiated %d).\n",
108 exit_cleanup(RERR_PROTOCOL);
112 if (delete_mode && !(delete_before+delete_during+delete_after)) {
113 if (protocol_version < 30)
119 if (protocol_version < 29) {
122 "--fuzzy requires protocol 29 or higher"
123 " (negotiated %d).\n",
125 exit_cleanup(RERR_PROTOCOL);
128 if (basis_dir_cnt && inplace) {
130 "%s with --inplace requires protocol 29 or higher"
131 " (negotiated %d).\n",
132 dest_option, protocol_version);
133 exit_cleanup(RERR_PROTOCOL);
136 if (basis_dir_cnt > 1) {
138 "Using more than one %s option requires protocol"
139 " 29 or higher (negotiated %d).\n",
140 dest_option, protocol_version);
141 exit_cleanup(RERR_PROTOCOL);
144 if (prune_empty_dirs) {
146 "--prune-empty-dirs requires protocol 29 or higher"
147 " (negotiated %d).\n",
149 exit_cleanup(RERR_PROTOCOL);
151 } else if (protocol_version >= 30) {
152 if (recurse && !preserve_hard_links && !delete_before
153 && !delete_after && !delay_updates && !prune_empty_dirs)
155 need_messages_from_generator = 1;
158 if (make_backups && !backup_dir && delete_mode && !delete_excluded
161 if (asprintf(&rule, "P%s *%s",
162 !am_sender || protocol_version >= 30 ? "p" : "",
164 out_of_memory("setup_protocol");
165 parse_rule(&filter_list, rule, 0, 0);
168 if (partial_dir && *partial_dir != '/' && !am_server) {
169 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
170 if (!am_sender || protocol_version >= 30)
171 flags |= MATCHFLG_PERISHABLE;
172 parse_rule(&filter_list, partial_dir, flags, 0);
177 checksum_seed = time(NULL);
178 write_int(f_out, checksum_seed);
180 checksum_seed = read_int(f_in);