X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/be2961da2c7cad6a4af440cfdf1fb902930c8b71..ce8149b6feae51c7a576b04f86003e7a4555ee14:/clientserver.c

diff --git a/clientserver.c b/clientserver.c
index 7e2ec161..190872d2 100644
--- a/clientserver.c
+++ b/clientserver.c
@@ -1,24 +1,29 @@
 /* -*- c-file-style: "linux"; -*-
-   
-   Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
-   Copyright (C) 2001-2002 by Martin Pool <mbp@samba.org>
-   
-   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.
-*/
-
-/* the socket based protocol for setting up a connection with rsyncd */
+ * 
+ * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
+ * Copyright (C) 2001-2002 by Martin Pool <mbp@samba.org>
+ * 
+ * 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.
+ */
+
+/**
+ * @file
+ *
+ * The socket based protocol for setting up a connection with
+ * rsyncd.
+ **/
 
 #include "rsync.h"
 
@@ -27,15 +32,21 @@ extern int read_only;
 extern int verbose;
 extern int rsync_port;
 char *auth_user;
-int sanitize_paths = 0;
+extern int sanitize_paths;
 
 /**
  * Run a client connected to an rsyncd.  The alternative to this
  * function for remote-shell connections is do_cmd().
  *
- * After initial server startup, hands over to client_run().
+ * After negotiating which module to use and reading the server's
+ * motd, this hands over to client_run().  Telling the server the
+ * module will cause it to chroot/setuid/etc.
+ *
+ * Instead of doing a transfer, the client may at this stage instead
+ * get a listing of remote modules and exit.
  *
  * @return -1 for error in startup, or the result of client_run().
+ * Either way, it eventually gets passed to exit_cleanup().
  **/
 int start_socket_client(char *host, char *path, int argc, char *argv[])
 {
@@ -47,6 +58,7 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 	extern int remote_version;
 	extern int am_sender;
 	extern char *shell_cmd;
+	extern int list_only;
 	extern int kludge_around_eof;
 	extern char *bind_address;
 	extern int default_af_hint;
@@ -126,7 +138,7 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 
 	/* Old servers may just drop the connection here,
 	 rather than sending a proper EXIT command.  Yuck. */
-	kludge_around_eof = remote_version < 25;
+	kludge_around_eof = list_only && (remote_version < 25);
 
 	while (1) {
 		if (!read_line(fd, line, sizeof(line)-1)) {
@@ -141,7 +153,13 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 
 		if (strcmp(line,"@RSYNCD: OK") == 0) break;
 
-		if (strcmp(line,"@RSYNCD: EXIT") == 0) exit(0);
+		if (strcmp(line,"@RSYNCD: EXIT") == 0) {
+			/* This is sent by recent versions of the
+			 * server to terminate the listing of modules.
+			 * We don't want to go on and transfer
+			 * anything; just exit. */
+			exit(0);
+		}
 
 		if (strncmp(line, "@ERROR", 6) == 0)
 			rprintf(FERROR,"%s\n", line);