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 */
31 extern int local_server;
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_acls;
45 extern int preserve_hard_links;
46 extern int need_messages_from_generator;
47 extern int delete_mode, delete_before, delete_during, delete_after;
48 extern int delete_excluded;
49 extern int make_backups;
50 extern char *backup_dir, *backup_suffix;
51 extern char *partial_dir;
52 extern char *dest_option;
53 extern struct filter_list_struct filter_list;
55 void setup_protocol(int f_out,int f_in)
58 file_extra_cnt += PTR_EXTRA_LEN;
62 preserve_uid = ++file_extra_cnt;
64 preserve_gid = ++file_extra_cnt;
65 if (preserve_acls && !am_sender)
66 preserve_acls = ++file_extra_cnt;
68 if (remote_protocol == 0) {
70 write_int(f_out, protocol_version);
71 remote_protocol = read_int(f_in);
72 if (protocol_version > remote_protocol)
73 protocol_version = remote_protocol;
75 if (read_batch && remote_protocol > protocol_version) {
76 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
77 remote_protocol, protocol_version);
78 exit_cleanup(RERR_PROTOCOL);
82 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
83 am_server? "Server" : "Client", remote_protocol, protocol_version);
85 if (remote_protocol < MIN_PROTOCOL_VERSION
86 || remote_protocol > MAX_PROTOCOL_VERSION) {
87 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
88 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
89 exit_cleanup(RERR_PROTOCOL);
91 if (remote_protocol < OLD_PROTOCOL_VERSION) {
92 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
93 am_server? "Client" : "Server");
95 if (protocol_version < MIN_PROTOCOL_VERSION) {
96 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
97 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
98 exit_cleanup(RERR_PROTOCOL);
100 if (protocol_version > PROTOCOL_VERSION) {
101 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
102 PROTOCOL_VERSION, am_server? "Server" : "Client");
103 exit_cleanup(RERR_PROTOCOL);
106 if (protocol_version < 30) {
107 if (max_delete == 0 && am_sender) {
109 "--max-delete=0 requires protocol 30 or higher"
110 " (negotiated %d).\n",
112 exit_cleanup(RERR_PROTOCOL);
116 "--acls requires protocol 30 or higher"
117 " (negotiated %d).\n",
119 exit_cleanup(RERR_PROTOCOL);
123 if (delete_mode && !(delete_before+delete_during+delete_after)) {
124 if (protocol_version < 30)
130 if (protocol_version < 29) {
133 "--fuzzy requires protocol 29 or higher"
134 " (negotiated %d).\n",
136 exit_cleanup(RERR_PROTOCOL);
139 if (basis_dir_cnt && inplace) {
141 "%s with --inplace requires protocol 29 or higher"
142 " (negotiated %d).\n",
143 dest_option, protocol_version);
144 exit_cleanup(RERR_PROTOCOL);
147 if (basis_dir_cnt > 1) {
149 "Using more than one %s option requires protocol"
150 " 29 or higher (negotiated %d).\n",
151 dest_option, protocol_version);
152 exit_cleanup(RERR_PROTOCOL);
155 if (prune_empty_dirs) {
157 "--prune-empty-dirs requires protocol 29 or higher"
158 " (negotiated %d).\n",
160 exit_cleanup(RERR_PROTOCOL);
162 } else if (protocol_version >= 30) {
163 if (recurse && !preserve_hard_links && !delete_before
164 && !delete_after && !delay_updates && !prune_empty_dirs)
166 need_messages_from_generator = 1;
169 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
170 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
171 if (!am_sender || protocol_version >= 30)
172 flags |= MATCHFLG_PERISHABLE;
173 parse_rule(&filter_list, partial_dir, flags, 0);
178 checksum_seed = time(NULL);
179 write_int(f_out, checksum_seed);
181 checksum_seed = read_int(f_in);