--- res/res_agi.c	2005-12-12 18:11:58.000000000 -0600
+++ res/res_agi.c.7446	2005-12-12 18:02:27.000000000 -0600
@@ -38,6 +38,7 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <sys/stat.h>
 
 #include "asterisk.h"
 
@@ -224,7 +225,8 @@
 	int x;
 	int res;
 	sigset_t signal_set;
-	
+	struct stat statbuf;
+
 	if (!strncasecmp(script, "agi://", 6))
 		return launch_netscript(script, argv, fds, efd, opid);
 	
@@ -232,6 +234,14 @@
 		snprintf(tmp, sizeof(tmp), "%s/%s", (char *)ast_config_AST_AGI_DIR, script);
 		script = tmp;
 	}
+        if (stat(script, &statbuf) < 0) {
+                ast_log(LOG_WARNING, "Unable to execute %s: File does not exist\n", script);
+                return -1;
+        }
+        if (!(statbuf.st_mode & S_IXUSR)) {
+                ast_log(LOG_WARNING, "Unable to execute %s: File is not executable\n", script);
+                return -1;
+        }
 	if (pipe(toast)) {
 		ast_log(LOG_WARNING, "Unable to create toast pipe: %s\n",strerror(errno));
 		return -1;