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Avoid SIGSEGV on out-of-range time_t.

This commit is contained in:
dholland 2010-06-05 03:24:01 +00:00
parent 6d83722e40
commit 2480682bb2
1 changed files with 6 additions and 2 deletions
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8
usr.bin/last/last.c
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@ -1,4 +1,4 @@
/* $NetBSD: last.c,v 1.33 2009/04/12 13:07:21 lukem Exp $ */
/* $NetBSD: last.c,v 1.34 2010/06/05 03:24:01 dholland Exp $ */
/*
* Copyright (c) 1987, 1993, 1994
@ -39,7 +39,7 @@ __COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\
#if 0
static char sccsid[] = "@(#)last.c 8.2 (Berkeley) 4/2/94";
#endif
__RCSID("$NetBSD: last.c,v 1.33 2009/04/12 13:07:21 lukem Exp $");
__RCSID("$NetBSD: last.c,v 1.34 2010/06/05 03:24:01 dholland Exp $");
#endif /* not lint */
#include <sys/param.h>
@ -362,6 +362,10 @@ fmttime(time_t t, int flags)
static char tbuf[TBUFLEN];
tm = (flags & GMT) ? gmtime(&t) : localtime(&t);
if (tm == NULL) {
strcpy(tbuf, "????");
return tbuf;
}
strftime(tbuf, sizeof(tbuf),
(flags & TIMEONLY)
? (flags & FULLTIME ? LTFMTS : TFMTS)