Don't crash if no arguments are passed.

(closes issue #16119)
 Reported by: thedavidfactor

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@228015 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_externalivr.c b/apps/app_externalivr.c
index 7258181..2f64fb2 100644 (file)
--- a/apps/app_externalivr.c
+++ b/apps/app_externalivr.c
@@ -373,6 +373,11 @@ static int app_exec(struct ast_channel *chan, const char *data)
        u->abort_current_sound = 0;
        u->chan = chan;
 
+       if (ast_strlen_zero(data)) {
+               ast_log(LOG_WARNING, "ExternalIVR requires a command to execute\n");
+               return -1;
+       }
+
        buf = ast_strdupa(data);
        AST_STANDARD_APP_ARGS(eivr_args, buf);