X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/7820fa949fbfdb61f5987acfd191538c74d46255..b3bf9b9df95137a3a43248be9599d919b04877af:/compat.c

diff --git a/compat.c b/compat.c
index 3750ff97..6e000724 100644
--- 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
@@ -25,7 +25,6 @@ int remote_protocol = 0;
 int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
 int inc_recurse = 0;
 
-extern int verbose;
 extern int am_server;
 extern int am_sender;
 extern int local_server;
@@ -48,28 +47,34 @@ 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 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)
+
+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 +88,9 @@ 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 +111,25 @@ 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 +141,9 @@ 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 +159,7 @@ 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 +183,8 @@ 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();
 
 	if (protocol_version < 30) {
 		if (append_mode == 1)
@@ -219,17 +245,50 @@ 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;
+		int compat_flags;
+		if (am_server) {
+			compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
+#if defined HAVE_LUTIMES && defined HAVE_UTIMES
+			compat_flags |= CF_SYMLINK_TIMES;
+#endif
+#ifdef ICONV_OPTION
+			compat_flags |= CF_SYMLINK_ICONV;
+#endif
+			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);
+		}
+#if defined HAVE_LUTIMES && defined HAVE_UTIMES
+		else
+			receiver_symlink_times = 1;
+#endif
+#ifdef ICONV_OPTION
+		sender_symlink_iconv = iconv_opt && (am_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);
+		}
 		need_messages_from_generator = 1;
+#if defined HAVE_LUTIMES && defined HAVE_UTIMES
+	} 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;