Safely use the strncat() function.

(closes issue #11958)
 Reported by: norman
 Patches: 
       20080209__bug11958.diff.txt uploaded by Corydon76 (license 14)


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@106552 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 2 insertions, 2 deletions

diff --git a/main/channel.c b/main/channel.c
index 73c7db603..febebc515 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -4373,12 +4373,12 @@ char *ast_print_group(char *buf, int buflen, ast_group_t group)
 	for (i = 0; i <= 63; i++) {	/* Max group is 63 */
 		if (group & ((ast_group_t) 1 << i)) {
 	   		if (!first) {
-				strncat(buf, ", ", buflen);
+				strncat(buf, ", ", buflen - strlen(buf) - 1);
 			} else {
 				first=0;
 	  		}
 			snprintf(num, sizeof(num), "%u", i);
-			strncat(buf, num, buflen);
+			strncat(buf, num, buflen - strlen(buf) - 1);
 		}
 	}
 	return buf;