diff options
Diffstat (limited to 'sbin/route/show.c')
| -rw-r--r-- | sbin/route/show.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/sbin/route/show.c b/sbin/route/show.c index 527dd1fa5d6..386ded5aa6e 100644 --- a/sbin/route/show.c +++ b/sbin/route/show.c @@ -1,4 +1,4 @@ -/* $OpenBSD: show.c,v 1.6 1998/07/09 01:32:12 deraadt Exp $ */ +/* $OpenBSD: show.c,v 1.7 1998/09/21 08:31:46 deraadt Exp $ */ /* $NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $ */ /* @@ -38,7 +38,7 @@ #if 0 static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94"; #else -static char *rcsid = "$OpenBSD: show.c,v 1.6 1998/07/09 01:32:12 deraadt Exp $"; +static char *rcsid = "$OpenBSD: show.c,v 1.7 1998/09/21 08:31:46 deraadt Exp $"; #endif #endif /* not lint */ @@ -112,7 +112,7 @@ show(argc, argv) char **argv; { register struct rt_msghdr *rtm; - char *buf, *next, *lim; + char *buf = NULL, *next, *lim; size_t needed; int mib[6]; @@ -126,21 +126,26 @@ show(argc, argv) perror("route-sysctl-estimate"); exit(1); } - if ((buf = malloc(needed)) == 0) { - printf("out of space\n"); - exit(1); - } - if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { - perror("sysctl of routing table"); - exit(1); + if (needed > 0) { + if ((buf = malloc(needed)) == 0) { + printf("out of space\n"); + exit(1); + } + if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { + perror("sysctl of routing table"); + exit(1); + } + lim = buf + needed; } - lim = buf + needed; printf("Routing tables\n"); - for (next = buf; next < lim; next += rtm->rtm_msglen) { - rtm = (struct rt_msghdr *)next; - p_rtentry(rtm); + if (buf) { + for (next = buf; next < lim; next += rtm->rtm_msglen) { + rtm = (struct rt_msghdr *)next; + p_rtentry(rtm); + } + free(buf); } } |