-/*
- Copyright (C) Andrew Tridgell 1996
- Copyright (C) Paul Mackerras 1996
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/* compatability routines for older rsync protocol versions */
+/*
+ * Compatibility routines for older rsync protocol versions.
+ *
+ * Copyright (C) Andrew Tridgell 1996
+ * Copyright (C) Paul Mackerras 1996
+ * Copyright (C) 2004-2007 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
#include "rsync.h"
-extern int am_server;
-
-extern int csum_length;
+int remote_protocol = 0;
+int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
+int inc_recurse = 0;
-extern int preserve_links;
-extern int preserve_perms;
-extern int preserve_devices;
+extern int verbose;
+extern int am_server;
+extern int am_sender;
+extern int local_server;
+extern int inplace;
+extern int recurse;
+extern int use_qsort;
+extern int allow_inc_recurse;
+extern int fuzzy_basis;
+extern int read_batch;
+extern int max_delete;
+extern int delay_updates;
+extern int checksum_seed;
+extern int basis_dir_cnt;
+extern int prune_empty_dirs;
+extern int protocol_version;
extern int preserve_uid;
extern int preserve_gid;
-extern int preserve_times;
-extern int always_checksum;
-extern int checksum_seed;
-
-
-extern int remote_version;
-
- void (*send_file_entry)(struct file_struct *file,int f) = NULL;
- void (*receive_file_entry)(struct file_struct *file,
- unsigned char flags,int f) = NULL;
-
-
-void send_file_entry_v10(struct file_struct *file,int f)
+extern int preserve_acls;
+extern int preserve_xattrs;
+extern int preserve_hard_links;
+extern int need_messages_from_generator;
+extern int delete_mode, delete_before, delete_during, delete_after;
+extern int delete_excluded;
+extern int make_backups;
+extern char *shell_cmd; /* contains VER.SUB string if client is a pre-release */
+extern char *backup_dir, *backup_suffix;
+extern char *partial_dir;
+extern char *dest_option;
+extern struct filter_list_struct filter_list;
+
+/* These index values are for the file-list's extra-attribute array. */
+int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx;
+
+/* The server makes sure that if either side only supports a pre-release
+ * version of a protocol, that both sides must speak a compatible version
+ * of that protocol for it to be advertised as available. */
+static void check_sub_protocol(void)
{
- unsigned char flags;
- static mode_t last_mode=0;
- static dev_t last_rdev=0;
- static uid_t last_uid=0;
- static gid_t last_gid=0;
- static char lastdir[MAXPATHLEN]="";
- char *p=NULL;
-
- if (f == -1) return;
-
- if (!file) {
- write_byte(f,0);
- return;
- }
-
- flags = FILE_VALID;
-
- if (file->mode == last_mode) flags |= SAME_MODE;
- if (file->rdev == last_rdev) flags |= SAME_RDEV;
- if (file->uid == last_uid) flags |= SAME_UID;
- if (file->gid == last_gid) flags |= SAME_GID;
-
- if (strncmp(file->name,lastdir,strlen(lastdir)) == 0) {
- flags |= SAME_DIR;
- p = file->name + strlen(lastdir);
- } else {
- p = file->name;
- }
-
- write_byte(f,flags);
- if (flags & SAME_DIR)
- write_byte(f,strlen(p));
- else
- write_int(f,strlen(p));
- write_buf(f,p,strlen(p));
- write_int(f,(int)file->modtime);
- write_int(f,(int)file->length);
- if (!(flags & SAME_MODE))
- write_int(f,(int)file->mode);
- if (preserve_uid && !(flags & SAME_UID))
- write_int(f,(int)file->uid);
- if (preserve_gid && !(flags & SAME_GID))
- write_int(f,(int)file->gid);
- if (preserve_devices && IS_DEVICE(file->mode) && !(flags & SAME_RDEV))
- write_int(f,(int)file->rdev);
-
-#if SUPPORT_LINKS
- if (preserve_links && S_ISLNK(file->mode)) {
- write_int(f,strlen(file->link));
- write_buf(f,file->link,strlen(file->link));
- }
-#endif
-
- if (always_checksum) {
- write_buf(f,file->sum,csum_length);
- }
-
- last_mode = file->mode;
- last_rdev = file->rdev;
- last_uid = file->uid;
- last_gid = file->gid;
- p = strrchr(file->name,'/');
- if (p) {
- int l = (int)(p - file->name) + 1;
- strncpy(lastdir,file->name,l);
- lastdir[l] = 0;
- } else {
- strcpy(lastdir,"");
- }
+ char *dot;
+ int their_protocol, their_sub;
+ int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
+
+ if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
+ || !(their_protocol = atoi(shell_cmd))
+ || !(their_sub = atoi(dot+1))) {
+ if (our_sub)
+ protocol_version--;
+ return;
+ }
+
+ if (their_protocol < protocol_version) {
+ if (their_sub)
+ protocol_version = their_protocol - 1;
+ return;
+ }
+
+ if (their_protocol > protocol_version)
+ their_sub = 0; /* 0 == final version */
+ if (their_sub != our_sub)
+ protocol_version--;
}
-
-
-void receive_file_entry_v10(struct file_struct *file,
- unsigned char flags,int f)
-{
- static mode_t last_mode=0;
- static dev_t last_rdev=0;
- static uid_t last_uid=0;
- static gid_t last_gid=0;
- static char lastdir[MAXPATHLEN]="";
- char *p=NULL;
- int l1,l2;
-
- if (flags & SAME_DIR) {
- l1 = read_byte(f);
- l2 = strlen(lastdir);
- } else {
- l1 = read_int(f);
- l2 = 0;
- }
-
- file->name = (char *)malloc(l1+l2+1);
- if (!file->name) out_of_memory("receive_file_entry");
-
- strncpy(file->name,lastdir,l2);
- read_buf(f,file->name+l2,l1);
- file->name[l1+l2] = 0;
-
- file->modtime = (time_t)read_int(f);
- file->length = (off_t)read_int(f);
- file->mode = (flags & SAME_MODE) ? last_mode : (mode_t)read_int(f);
- if (preserve_uid)
- file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
- if (preserve_gid)
- file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
- if (preserve_devices && IS_DEVICE(file->mode))
- file->rdev = (flags & SAME_RDEV) ? last_rdev : (dev_t)read_int(f);
-
-#if SUPPORT_LINKS
- if (preserve_links && S_ISLNK(file->mode)) {
- int l = read_int(f);
- file->link = (char *)malloc(l+1);
- if (!file->link) out_of_memory("receive_file_entry");
- read_buf(f,file->link,l);
- file->link[l] = 0;
- }
-#endif
-
- if (always_checksum)
- read_buf(f,file->sum,csum_length);
-
- last_mode = file->mode;
- last_rdev = file->rdev;
- last_uid = file->uid;
- last_gid = file->gid;
- p = strrchr(file->name,'/');
- if (p) {
- int l = (int)(p - file->name) + 1;
- strncpy(lastdir,file->name,l);
- lastdir[l] = 0;
- } else {
- strcpy(lastdir,"");
- }
-}
-
-
-
-
void setup_protocol(int f_out,int f_in)
{
- if (am_server) {
- remote_version = read_int(f_in);
- write_int(f_out,PROTOCOL_VERSION);
- write_flush(f_out);
- } else {
- write_int(f_out,PROTOCOL_VERSION);
- write_flush(f_out);
- remote_version = read_int(f_in);
- }
-
- if (remote_version < MIN_PROTOCOL_VERSION ||
- remote_version > MAX_PROTOCOL_VERSION) {
- fprintf(FERROR,"protocol version mismatch - is your shell clean?\n");
- exit_cleanup(1);
- }
-
- if (remote_version == 10) {
- send_file_entry = send_file_entry_v10;
- receive_file_entry = receive_file_entry_v10;
- } else {
- send_file_entry = send_file_entry_v11;
- receive_file_entry = receive_file_entry_v11;
- }
-
- if (remote_version >= 12) {
- if (am_server) {
- checksum_seed = time(NULL);
- write_int(f_out,checksum_seed);
- } else {
- checksum_seed = read_int(f_in);
- }
- }
+ if (am_sender)
+ file_extra_cnt += PTR_EXTRA_LEN;
+ else
+ file_extra_cnt++;
+ if (preserve_uid)
+ uid_ndx = ++file_extra_cnt;
+ if (preserve_gid)
+ gid_ndx = ++file_extra_cnt;
+ if (preserve_acls && !am_sender)
+ acls_ndx = ++file_extra_cnt;
+ if (preserve_xattrs)
+ xattrs_ndx = ++file_extra_cnt;
+
+ if (remote_protocol == 0) {
+ if (am_server && !local_server)
+ check_sub_protocol();
+ if (!read_batch)
+ write_int(f_out, protocol_version);
+ remote_protocol = read_int(f_in);
+ if (protocol_version > remote_protocol)
+ protocol_version = remote_protocol;
+ }
+ if (read_batch && remote_protocol > protocol_version) {
+ rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
+ remote_protocol, protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ if (verbose > 3) {
+ rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
+ am_server? "Server" : "Client", remote_protocol, protocol_version);
+ }
+ if (remote_protocol < MIN_PROTOCOL_VERSION
+ || remote_protocol > MAX_PROTOCOL_VERSION) {
+ rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
+ rprintf(FERROR,"(see the rsync man page for an explanation)\n");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ if (remote_protocol < OLD_PROTOCOL_VERSION) {
+ rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
+ am_server? "Client" : "Server");
+ }
+ if (protocol_version < MIN_PROTOCOL_VERSION) {
+ rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
+ MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ if (protocol_version > PROTOCOL_VERSION) {
+ rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
+ PROTOCOL_VERSION, am_server? "Server" : "Client");
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ if (protocol_version < 30) {
+ if (max_delete == 0 && am_sender) {
+ rprintf(FERROR,
+ "--max-delete=0 requires protocol 30 or higher"
+ " (negotiated %d).\n",
+ protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ if (preserve_acls && !local_server) {
+ rprintf(FERROR,
+ "--acls requires protocol 30 or higher"
+ " (negotiated %d).\n",
+ protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ if (preserve_xattrs && !local_server) {
+ rprintf(FERROR,
+ "--xattrs requires protocol 30 or higher"
+ " (negotiated %d).\n",
+ protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ }
+
+ if (delete_mode && !(delete_before+delete_during+delete_after)) {
+ if (protocol_version < 30)
+ delete_before = 1;
+ else
+ delete_during = 1;
+ }
+
+ if (protocol_version < 29) {
+ if (fuzzy_basis) {
+ rprintf(FERROR,
+ "--fuzzy requires protocol 29 or higher"
+ " (negotiated %d).\n",
+ protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ if (basis_dir_cnt && inplace) {
+ rprintf(FERROR,
+ "%s with --inplace requires protocol 29 or higher"
+ " (negotiated %d).\n",
+ dest_option, protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ if (basis_dir_cnt > 1) {
+ rprintf(FERROR,
+ "Using more than one %s option requires protocol"
+ " 29 or higher (negotiated %d).\n",
+ dest_option, protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ if (prune_empty_dirs) {
+ rprintf(FERROR,
+ "--prune-empty-dirs requires protocol 29 or higher"
+ " (negotiated %d).\n",
+ protocol_version);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ } else if (protocol_version >= 30) {
+ if (recurse && allow_inc_recurse && !preserve_hard_links
+ && !delete_before && !delete_after && !delay_updates
+ && !prune_empty_dirs && !use_qsort)
+ inc_recurse = 1;
+ need_messages_from_generator = 1;
+ }
+
+ if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
+ int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
+ if (!am_sender || protocol_version >= 30)
+ flags |= MATCHFLG_PERISHABLE;
+ parse_rule(&filter_list, partial_dir, flags, 0);
+ }
+
+ if (am_server) {
+ if (!checksum_seed)
+ checksum_seed = time(NULL);
+ write_int(f_out, checksum_seed);
+ } else {
+ checksum_seed = read_int(f_in);
+ }
}
-
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff