[src/trunk]: src/usr.bin/systat Add missing memory check in port table handli...

[tron <tron%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f2f2310c6394
branches:  trunk
changeset: 480052:f2f2310c6394
user:      tron <tron%NetBSD.org@localhost>
date:      Fri Dec 31 12:58:12 1999 +0000

description:
Add missing memory check in port table handling. Patch based on
PR bin/9080 by Jun-ichiro itojun Hagino

diffstat:

 usr.bin/systat/netcmds.c |  21 ++++++++++++---------
 1 files changed, 12 insertions(+), 9 deletions(-)

diffs (57 lines):

diff -r e9e5918da945 -r f2f2310c6394 usr.bin/systat/netcmds.c
--- a/usr.bin/systat/netcmds.c  Fri Dec 31 12:42:35 1999 +0000
+++ b/usr.bin/systat/netcmds.c  Fri Dec 31 12:58:12 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: netcmds.c,v 1.10 1999/12/20 04:06:25 jwise Exp $       */
+/*     $NetBSD: netcmds.c,v 1.11 1999/12/31 12:58:12 tron Exp $        */
 
 /*-
  * Copyright (c) 1980, 1992, 1993
@@ -38,7 +38,7 @@
 #if 0
 static char sccsid[] = "@(#)netcmds.c  8.1 (Berkeley) 6/6/93";
 #endif
-__RCSID("$NetBSD: netcmds.c,v 1.10 1999/12/20 04:06:25 jwise Exp $");
+__RCSID("$NetBSD: netcmds.c,v 1.11 1999/12/31 12:58:12 tron Exp $");
 #endif /* not lint */
 
 /*
@@ -210,7 +210,7 @@
 static struct pitem {
        long    port;
        int     onoff;
-} *ports;
+} *ports = NULL;
 
 static int
 selectport(port, onoff)
@@ -220,9 +220,10 @@
        struct pitem *p;
 
        if (port == -1) {
-               if (ports == 0)
+               if (ports == NULL)
                        return (0);
-               free((char *)ports), ports = 0;
+               free(ports);
+               ports = NULL;
                nports = 0;
                return (1);
        }
@@ -231,10 +232,12 @@
                        p->onoff = onoff;
                        return (0);
                }
-       if (nports == 0)
-               ports = (struct pitem *)malloc(sizeof (*p));
-       else
-               ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p));
+       p = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p));
+       if (p == NULL) {
+               error("malloc failed");
+               die(0);
+       }
+       ports = p;
        p = &ports[nports++];
        p->port = port;
        p->onoff = onoff;