[lib] Fix the struct message LOOKUP function to be more robust
2008-02-28 Paul Jakma <paul.jakma@sun.com>
* log.c: (mes_lookup) Sowmini Varadhan diagnosed a problem where
this function can cause a NULL dereference, on lookups for unknown
indices, or messages with NULL strings. Can occur, e.g., debug
logging code when processing received messages. Fixed to accept a
pointer to a default string to be used if there is no match.
* log.h: LOOKUP adjusted to match
diff --git a/lib/log.h b/lib/log.h
index da8fbea..7432b25 100644
--- a/lib/log.h
+++ b/lib/log.h
@@ -142,10 +142,12 @@
extern int zlog_rotate (struct zlog *);
/* For hackey massage lookup and check */
-#define LOOKUP(x, y) mes_lookup(x, x ## _max, y)
+#define LOOKUP(x, y) mes_lookup(x, x ## _max, y, "(no item found)")
extern const char *lookup (struct message *, int);
-extern const char *mes_lookup (struct message *meslist, int max, int index);
+extern const char *mes_lookup (struct message *meslist,
+ int max, int index,
+ const char *no_item);
extern const char *zlog_priority[];
extern const char *zlog_proto_names[];