Index: action.c
===================================================================
--- csync2-1.34/action.c	2007-07-25 05:04:18.000000000 +0800
+++ csync2-1.34/action.c	2009-12-04 17:51:47.000000000 +0800
@@ -107,7 +107,7 @@
 		/* 1 */ open(logfile_clr, O_WRONLY|O_CREAT|O_APPEND, 0666);
 		/* 2 */ open(logfile_clr, O_WRONLY|O_CREAT|O_APPEND, 0666);
 
-		execl("/bin/sh", "sh", "-c", real_command, 0);
+		execl("/bin/sh", "sh", "-c", real_command, NULL);
 		_exit(127);
 	}