Applying the preallocate patch.
[rsync/rsync.git] / compat.c
index 3750ff9..45073d3 100644 (file)
--- a/compat.c
+++ b/compat.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) Andrew Tridgell 1996
  * Copyright (C) Paul Mackerras 1996
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2009 Wayne Davison
  *
  * 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
@@ -24,8 +24,9 @@
 int remote_protocol = 0;
 int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
 int inc_recurse = 0;
+int compat_flags = 0;
+int use_safe_inc_flist = 0;
 
-extern int verbose;
 extern int am_server;
 extern int am_sender;
 extern int local_server;
@@ -33,6 +34,7 @@ extern int inplace;
 extern int recurse;
 extern int use_qsort;
 extern int allow_inc_recurse;
+extern int preallocate_files;
 extern int append_mode;
 extern int fuzzy_basis;
 extern int read_batch;
@@ -48,28 +50,35 @@ extern int preserve_acls;
 extern int preserve_xattrs;
 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 *shell_cmd;
 extern char *partial_dir;
 extern char *dest_option;
 extern char *files_from;
 extern char *filesfrom_host;
-extern struct filter_list_struct filter_list;
+extern filter_rule_list filter_list;
+extern int need_unsorted_flist;
 #ifdef ICONV_OPTION
-extern char *iconv_opt;
 extern iconv_t ic_send, ic_recv;
+extern char *iconv_opt;
 #endif
 
 /* These index values are for the file-list's extra-attribute array. */
-int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx;
-#ifdef ICONV_OPTION
-int ic_ndx;
+int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
+
+int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
+int sender_symlink_iconv = 0;  /* sender should convert symlink content */
 
+#ifdef ICONV_OPTION
 int filesfrom_convert = 0;
 #endif
 
+#define CF_INC_RECURSE  (1<<0)
+#define CF_SYMLINK_TIMES (1<<1)
+#define CF_SYMLINK_ICONV (1<<2)
+#define CF_SAFE_FLIST   (1<<3)
+
+static const char *client_info;
+
 /* 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. */
@@ -83,8 +92,9 @@ static void check_sub_protocol(void)
        int our_sub = 0;
 #endif
 
-       if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
-        || !(their_protocol = atoi(shell_cmd))
+       /* client_info starts with VER.SUB string if client is a pre-release. */
+       if (!(their_protocol = atoi(client_info))
+        || !(dot = strchr(client_info, '.'))
         || !(their_sub = atoi(dot+1))) {
 #if SUBPROTOCOL_VERSION != 0
                if (our_sub)
@@ -105,10 +115,25 @@ static void check_sub_protocol(void)
                protocol_version--;
 }
 
+void set_allow_inc_recurse(void)
+{
+       client_info = shell_cmd ? shell_cmd : "";
+
+       if (!recurse || use_qsort)
+               allow_inc_recurse = 0;
+       else if (!am_sender
+        && (delete_before || delete_after
+         || delay_updates || prune_empty_dirs))
+               allow_inc_recurse = 0;
+       else if (am_server && !local_server
+        && (strchr(client_info, 'i') == NULL))
+               allow_inc_recurse = 0;
+}
+
 void setup_protocol(int f_out,int f_in)
 {
        if (am_sender)
-               file_extra_cnt += PTR_EXTRA_LEN;
+               file_extra_cnt += PTR_EXTRA_CNT;
        else
                file_extra_cnt++;
        if (preserve_uid)
@@ -120,6 +145,9 @@ void setup_protocol(int f_out,int f_in)
        if (preserve_xattrs)
                xattrs_ndx = ++file_extra_cnt;
 
+       if (am_server)
+               set_allow_inc_recurse();
+
        if (remote_protocol == 0) {
                if (am_server && !local_server)
                        check_sub_protocol();
@@ -135,7 +163,7 @@ void setup_protocol(int f_out,int f_in)
                exit_cleanup(RERR_PROTOCOL);
        }
 
-       if (verbose > 3) {
+       if (DEBUG_GTE(PROTO, 1)) {
                rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
                        am_server? "Server" : "Client", remote_protocol, protocol_version);
        }
@@ -159,6 +187,16 @@ void setup_protocol(int f_out,int f_in)
                        PROTOCOL_VERSION, am_server? "Server" : "Client");
                exit_cleanup(RERR_PROTOCOL);
        }
+       if (read_batch)
+               check_batch_flags();
+
+#ifndef SUPPORT_PREALLOCATION
+       if (preallocate_files && !am_sender) {
+               rprintf(FERROR, "preallocation is not supported on this %s\n",
+                       am_server ? "Server" : "Client");
+               exit_cleanup(RERR_SYNTAX);
+       }
+#endif
 
        if (protocol_version < 30) {
                if (append_mode == 1)
@@ -219,23 +257,58 @@ void setup_protocol(int f_out,int f_in)
                        exit_cleanup(RERR_PROTOCOL);
                }
        } else if (protocol_version >= 30) {
-               if (recurse && allow_inc_recurse
-                && !delete_before && !delete_after && !delay_updates
-                && !use_qsort && !prune_empty_dirs)
-                       inc_recurse = 1;
+               if (am_server) {
+                       compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
+#ifdef CAN_SET_SYMLINK_TIMES
+                       compat_flags |= CF_SYMLINK_TIMES;
+#endif
+#ifdef ICONV_OPTION
+                       compat_flags |= CF_SYMLINK_ICONV;
+#endif
+                       if (local_server || strchr(client_info, 'f') != NULL)
+                               compat_flags |= CF_SAFE_FLIST;
+                       write_byte(f_out, compat_flags);
+               } else
+                       compat_flags = read_byte(f_in);
+               /* The inc_recurse var MUST be set to 0 or 1. */
+               inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
+               if (am_sender) {
+                       receiver_symlink_times = am_server
+                           ? strchr(client_info, 'L') != NULL
+                           : !!(compat_flags & CF_SYMLINK_TIMES);
+               }
+#ifdef CAN_SET_SYMLINK_TIMES
+               else
+                       receiver_symlink_times = 1;
+#endif
+#ifdef ICONV_OPTION
+               sender_symlink_iconv = iconv_opt && (am_server
+                   ? local_server || strchr(client_info, 's') != NULL
+                   : !!(compat_flags & CF_SYMLINK_ICONV));
+#endif
+               if (inc_recurse && !allow_inc_recurse) {
+                       /* This should only be able to happen in a batch. */
+                       fprintf(stderr,
+                           "Incompatible options specified for inc-recursive %s.\n",
+                           read_batch ? "batch file" : "connection");
+                       exit_cleanup(RERR_SYNTAX);
+               }
+               use_safe_inc_flist = (compat_flags & CF_SAFE_FLIST) || protocol_version >= 31;
                need_messages_from_generator = 1;
+#ifdef CAN_SET_SYMLINK_TIMES
+       } else if (!am_sender) {
+               receiver_symlink_times = 1;
+#endif
        }
 
-#ifdef ICONV_OPTION
-       if (iconv_opt && (!am_sender || inc_recurse))
-               ic_ndx = ++file_extra_cnt;
-#endif
+       if (need_unsorted_flist && (!am_sender || inc_recurse))
+               unsort_ndx = ++file_extra_cnt;
 
        if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
-               int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
+               int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY;
                if (!am_sender || protocol_version >= 30)
-                       flags |= MATCHFLG_PERISHABLE;
-               parse_rule(&filter_list, partial_dir, flags, 0);
+                       rflags |= FILTRULE_PERISHABLE;
+               parse_filter_str(&filter_list, partial_dir, rule_template(rflags), 0);
        }