2 * Compatibility routines for older rsync protocol versions.
4 * Copyright (C) Andrew Tridgell 1996
5 * Copyright (C) Paul Mackerras 1996
6 * Copyright (C) 2004, 2005, 2006, 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 as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
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.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
25 int remote_protocol = 0;
26 int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
34 extern int fuzzy_basis;
35 extern int read_batch;
36 extern int max_delete;
37 extern int delay_updates;
38 extern int checksum_seed;
39 extern int basis_dir_cnt;
40 extern int prune_empty_dirs;
41 extern int protocol_version;
42 extern int preserve_uid;
43 extern int preserve_gid;
44 extern int preserve_hard_links;
45 extern int need_messages_from_generator;
46 extern int delete_mode, delete_before, delete_during, delete_after;
47 extern char *dest_option;
49 void setup_protocol(int f_out,int f_in)
52 file_extra_cnt += PTR_EXTRA_LEN;
56 preserve_uid = ++file_extra_cnt;
58 preserve_gid = ++file_extra_cnt;
60 if (remote_protocol == 0) {
62 write_int(f_out, protocol_version);
63 remote_protocol = read_int(f_in);
64 if (protocol_version > remote_protocol)
65 protocol_version = remote_protocol;
67 if (read_batch && remote_protocol > protocol_version) {
68 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
69 remote_protocol, protocol_version);
70 exit_cleanup(RERR_PROTOCOL);
74 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
75 am_server? "Server" : "Client", remote_protocol, protocol_version);
77 if (remote_protocol < MIN_PROTOCOL_VERSION
78 || remote_protocol > MAX_PROTOCOL_VERSION) {
79 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
80 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
81 exit_cleanup(RERR_PROTOCOL);
83 if (remote_protocol < OLD_PROTOCOL_VERSION) {
84 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
85 am_server? "Client" : "Server");
87 if (protocol_version < MIN_PROTOCOL_VERSION) {
88 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
89 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
90 exit_cleanup(RERR_PROTOCOL);
92 if (protocol_version > PROTOCOL_VERSION) {
93 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
94 PROTOCOL_VERSION, am_server? "Server" : "Client");
95 exit_cleanup(RERR_PROTOCOL);
98 if (protocol_version < 30) {
99 if (max_delete == 0 && am_sender) {
101 "--max-delete=0 requires protocol 30 or higher"
102 " (negotiated %d).\n",
104 exit_cleanup(RERR_PROTOCOL);
108 if (delete_mode && !(delete_before+delete_during+delete_after)) {
109 if (protocol_version < 30)
115 if (protocol_version < 29) {
118 "--fuzzy requires protocol 29 or higher"
119 " (negotiated %d).\n",
121 exit_cleanup(RERR_PROTOCOL);
124 if (basis_dir_cnt && inplace) {
126 "%s with --inplace requires protocol 29 or higher"
127 " (negotiated %d).\n",
128 dest_option, protocol_version);
129 exit_cleanup(RERR_PROTOCOL);
132 if (basis_dir_cnt > 1) {
134 "Using more than one %s option requires protocol"
135 " 29 or higher (negotiated %d).\n",
136 dest_option, protocol_version);
137 exit_cleanup(RERR_PROTOCOL);
140 if (prune_empty_dirs) {
142 "--prune-empty-dirs requires protocol 29 or higher"
143 " (negotiated %d).\n",
145 exit_cleanup(RERR_PROTOCOL);
147 } else if (protocol_version >= 30) {
148 if (recurse && !preserve_hard_links && !delete_before
149 && !delete_after && !delay_updates && !prune_empty_dirs)
151 need_messages_from_generator = 1;
156 checksum_seed = time(NULL);
157 write_int(f_out, checksum_seed);
159 checksum_seed = read_int(f_in);