Initialize OID print buffer, even when oidlen is 0.

Fix printing old garbage from previous conversions.

OK tb@

diff --git a/lib/libagentx/ax.c b/lib/libagentx/ax.c
index f2e159f..4f96322 100644 (file)
--- a/lib/libagentx/ax.c
+++ b/lib/libagentx/ax.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ax.c,v 1.7 2021/01/02 01:06:31 rob Exp $ */
+/*     $OpenBSD: ax.c,v 1.8 2021/10/24 17:43:38 martijn Exp $ */
 /*
  * Copyright (c) 2019 Martijn van Duren <martijn@openbsd.org>
  *
@@ -764,6 +764,8 @@ ax_oidrange2string(struct ax_oid *oid, uint8_t range_subid,
 
        rest = sizeof(buf);
        p = buf;
+       if (oid->aoi_idlen == 0)
+               (void)strlcpy(buf, "null", sizeof(buf));
        for (i = 0; i < oid->aoi_idlen; i++) {
                if (range_subid != 0 && range_subid - 1 == (uint8_t)i)
                        ret = snprintf(p, rest, ".[%u-%u]", oid->aoi_id[i],