Date: Fri, 30 Jul 2004 06:14:02 GMT From: Takayuki Sakuma <takayuki@finet.fujitsu.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/69788: The processing result of strtoul() cannot judge whether it is an error. Message-ID: <200407300614.i6U6E2Ps087850@www.freebsd.org> Resent-Message-ID: <200407300620.i6U6KCAM091280@freefall.freebsd.org>
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>Number: 69788
>Category: misc
>Synopsis: The processing result of strtoul() cannot judge whether it is an error.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jul 30 06:20:12 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator: Takayuki Sakuma
>Release: 4.10-RELEASE
>Organization:
>Environment:
FreeBSD moon.finet.fujitsu.co.jp 4.10-RELEASE FreeBSD 4.10-RELEASE #0: Tue Jul 6 12:59:40 JST 2004 root@moon.finet.fujitsu.co.jp:/usr/src/sys/compile/withDVD i386
>Description:
The processing result of strtoul() cannot judge whether it is an error when errno has already set to ERANGE before calling this function.
>How-To-Repeat:
void
main(void)
{
unsigned long ul;
char *p;
ul = strtoul("4294967296", &p, 10);
printf("ul=%lu,*p=%x,errno=%d(%s)\n", ul, *p, errno, strerror(errno));
ul = strtoul("4294967295", &p, 10);
printf("ul=%lu,*p=%x,errno=%d(%s)\n", ul, *p, errno, strerror(errno));
errno=0;
ul = strtoul("4294967295", &p, 10);
printf("ul=%lu,*p=%x,errno=%d(%s)\n", ul, *p, errno, strerror(errno));
}
result:
ul=4294967295,*p=0,errno=34(Result too large)
ul=4294967295,*p=0,errno=34(Result too large)
ul=4294967295,*p=0,errno=22(Unknown error: 0)
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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