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 allow_inc_recurse;
35 extern int fuzzy_basis;
36 extern int read_batch;
37 extern int max_delete;
38 extern int delay_updates;
39 extern int checksum_seed;
40 extern int basis_dir_cnt;
41 extern int prune_empty_dirs;
42 extern int protocol_version;
43 extern int preserve_uid;
44 extern int preserve_gid;
45 extern int preserve_acls;
46 extern int preserve_xattrs;
47 extern int preserve_hard_links;
48 extern int need_messages_from_generator;
49 extern int delete_mode, delete_before, delete_during, delete_after;
50 extern int delete_excluded;
51 extern int make_backups;
52 extern char *backup_dir, *backup_suffix;
53 extern char *partial_dir;
54 extern char *dest_option;
55 extern struct filter_list_struct filter_list;
57 void setup_protocol(int f_out,int f_in)
60 file_extra_cnt += PTR_EXTRA_LEN;
64 preserve_uid = ++file_extra_cnt;
66 preserve_gid = ++file_extra_cnt;
67 if (preserve_acls && !am_sender)
68 preserve_acls = ++file_extra_cnt;
70 preserve_xattrs = ++file_extra_cnt;
72 if (remote_protocol == 0) {
74 write_int(f_out, protocol_version);
75 remote_protocol = read_int(f_in);
76 if (protocol_version > remote_protocol)
77 protocol_version = remote_protocol;
79 if (read_batch && remote_protocol > protocol_version) {
80 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
81 remote_protocol, protocol_version);
82 exit_cleanup(RERR_PROTOCOL);
86 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
87 am_server? "Server" : "Client", remote_protocol, protocol_version);
89 if (remote_protocol < MIN_PROTOCOL_VERSION
90 || remote_protocol > MAX_PROTOCOL_VERSION) {
91 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
92 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
93 exit_cleanup(RERR_PROTOCOL);
95 if (remote_protocol < OLD_PROTOCOL_VERSION) {
96 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
97 am_server? "Client" : "Server");
99 if (protocol_version < MIN_PROTOCOL_VERSION) {
100 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
101 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
102 exit_cleanup(RERR_PROTOCOL);
104 if (protocol_version > PROTOCOL_VERSION) {
105 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
106 PROTOCOL_VERSION, am_server? "Server" : "Client");
107 exit_cleanup(RERR_PROTOCOL);
110 if (protocol_version < 30) {
111 if (max_delete == 0 && am_sender) {
113 "--max-delete=0 requires protocol 30 or higher"
114 " (negotiated %d).\n",
116 exit_cleanup(RERR_PROTOCOL);
120 "--acls requires protocol 30 or higher"
121 " (negotiated %d).\n",
123 exit_cleanup(RERR_PROTOCOL);
125 if (preserve_xattrs) {
127 "--xattrs requires protocol 30 or higher"
128 " (negotiated %d).\n",
130 exit_cleanup(RERR_PROTOCOL);
134 if (delete_mode && !(delete_before+delete_during+delete_after)) {
135 if (protocol_version < 30)
141 if (protocol_version < 29) {
144 "--fuzzy requires protocol 29 or higher"
145 " (negotiated %d).\n",
147 exit_cleanup(RERR_PROTOCOL);
150 if (basis_dir_cnt && inplace) {
152 "%s with --inplace requires protocol 29 or higher"
153 " (negotiated %d).\n",
154 dest_option, protocol_version);
155 exit_cleanup(RERR_PROTOCOL);
158 if (basis_dir_cnt > 1) {
160 "Using more than one %s option requires protocol"
161 " 29 or higher (negotiated %d).\n",
162 dest_option, protocol_version);
163 exit_cleanup(RERR_PROTOCOL);
166 if (prune_empty_dirs) {
168 "--prune-empty-dirs requires protocol 29 or higher"
169 " (negotiated %d).\n",
171 exit_cleanup(RERR_PROTOCOL);
173 } else if (protocol_version >= 30) {
174 if (recurse && allow_inc_recurse && !preserve_hard_links
175 && !delete_before && !delete_after && !delay_updates
176 && !prune_empty_dirs)
178 need_messages_from_generator = 1;
181 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
182 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
183 if (!am_sender || protocol_version >= 30)
184 flags |= MATCHFLG_PERISHABLE;
185 parse_rule(&filter_list, partial_dir, flags, 0);
190 checksum_seed = time(NULL);
191 write_int(f_out, checksum_seed);
193 checksum_seed = read_int(f_in);