Date: Wed, 6 May 1998 02:10:01 -0700 (PDT) From: A Joseph Koshy <koshy@india.hp.com> To: freebsd-bugs@FreeBSD.ORG Subject: Re: bin/2832: w treats corrupted utmp as fatal error Message-ID: <199805060910.CAA10045@freefall.freebsd.org>
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The following reply was made to PR bin/2832; it has been noted by GNATS.
From: A Joseph Koshy <koshy@india.hp.com>
To: freebsd-gnats-submit@freebsd.org, fenner@parc.xerox.com
Cc: phk@freebsd.org, steve@freebsd.org
Subject: Re: bin/2832: w treats corrupted utmp as fatal error
Date: Wed, 06 May 1998 14:37:50 +0530
Here is a patch that fixes the problem pointed out by Steve P.
This was generated against r1.25 of "w.c" i.e --current.
-stable can use the same fix.
Regards,
Koshy
-------- -------- -------- -------- -------- -------- -------- --------
# diff -u w.c-- w.c
--- w.c-- Mon Sep 1 11:17:26 1997
+++ w.c Wed Sep 17 11:13:19 1997
@@ -209,6 +209,8 @@
for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
if (utmp.ut_name[0] == '\0')
continue;
+ if (!(stp = ttystat(utmp.ut_line)))
+ continue;
++nusers;
if (wcmd == 0 || (sel_user &&
strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
@@ -218,7 +220,6 @@
*nextp = ep;
nextp = &(ep->next);
memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
- stp = ttystat(ep->utmp.ut_line);
ep->tdev = stp->st_rdev;
#ifdef CPU_CONSDEV
/*
@@ -476,8 +477,10 @@
char ttybuf[MAXPATHLEN];
(void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
- if (stat(ttybuf, &sb))
- err(1, "%s", ttybuf);
+ if (stat(ttybuf, &sb)) {
+ warn("%s", ttybuf);
+ return NULL;
+ }
return (&sb);
}
-------- -------- -------- -------- -------- -------- -------- --------
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