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 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 flist_extra_cnt = 0; /* count of file-list extras that everyone gets */
32 extern int fuzzy_basis;
33 extern int read_batch;
34 extern int max_delete;
35 extern int checksum_seed;
36 extern int basis_dir_cnt;
37 extern int prune_empty_dirs;
38 extern int protocol_version;
39 extern char *dest_option;
41 void setup_protocol(int f_out,int f_in)
44 flist_extra_cnt += PTR_EXTRA_LEN;
48 preserve_uid = ++flist_extra_cnt;
50 preserve_gid = ++flist_extra_cnt;
52 if (remote_protocol == 0) {
54 write_int(f_out, protocol_version);
55 remote_protocol = read_int(f_in);
56 if (protocol_version > remote_protocol)
57 protocol_version = remote_protocol;
59 if (read_batch && remote_protocol > protocol_version) {
60 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
61 remote_protocol, protocol_version);
62 exit_cleanup(RERR_PROTOCOL);
66 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
67 am_server? "Server" : "Client", remote_protocol, protocol_version);
69 if (remote_protocol < MIN_PROTOCOL_VERSION
70 || remote_protocol > MAX_PROTOCOL_VERSION) {
71 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
72 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
73 exit_cleanup(RERR_PROTOCOL);
75 if (remote_protocol < OLD_PROTOCOL_VERSION) {
76 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
77 am_server? "Client" : "Server");
79 if (protocol_version < MIN_PROTOCOL_VERSION) {
80 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
81 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
82 exit_cleanup(RERR_PROTOCOL);
84 if (protocol_version > PROTOCOL_VERSION) {
85 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
86 PROTOCOL_VERSION, am_server? "Server" : "Client");
87 exit_cleanup(RERR_PROTOCOL);
90 if (protocol_version < 30) {
91 if (max_delete == 0 && am_sender) {
93 "--max-delete=0 requires protocol 30 or higher"
94 " (negotiated %d).\n",
96 exit_cleanup(RERR_PROTOCOL);
100 if (protocol_version < 29) {
103 "--fuzzy requires protocol 29 or higher"
104 " (negotiated %d).\n",
106 exit_cleanup(RERR_PROTOCOL);
109 if (basis_dir_cnt && inplace) {
111 "%s with --inplace requires protocol 29 or higher"
112 " (negotiated %d).\n",
113 dest_option, protocol_version);
114 exit_cleanup(RERR_PROTOCOL);
117 if (basis_dir_cnt > 1) {
119 "Using more than one %s option requires protocol"
120 " 29 or higher (negotiated %d).\n",
121 dest_option, protocol_version);
122 exit_cleanup(RERR_PROTOCOL);
125 if (prune_empty_dirs) {
127 "--prune-empty-dirs requires protocol 29 or higher"
128 " (negotiated %d).\n",
130 exit_cleanup(RERR_PROTOCOL);
136 checksum_seed = time(NULL);
137 write_int(f_out, checksum_seed);
139 checksum_seed = read_int(f_in);