misc/69788: The processing result of strtoul() cannot judge whether it is an error.

[Steven Smith]

The following reply was made to PR misc/69788; it has been noted by GNATS.

From: Steven Smith <sos22 at cantab.net>
To: SAKUMA takayuki <takayuki at finet.fujitsu.com>
Cc: freebsd-gnats-submit at FreeBSD.org, sos22 at srcf.ucam.org
Subject: Re: misc/69788: The processing result of strtoul() cannot judge whether it is an error.
Date: Fri, 30 Jul 2004 10:17:58 +0100

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 > ul =3D strtoul("4294967296", &p, 10);
 > ul =3D strtoul("4294967295", &p, 10);
 >=20
 > 2nd strtoul() will success, but errno =3D=3D ERANGE.
 > Is it necessary to set errno as 0 before calling 2nd strtoul() ?
 Yes: a succesful library call leaves errno unchanged, rather than
 setting it to 0 (usually).
 
 Steven Smith,
 sos22 at cantab.net.
 --=20
 One day, I'm going to get an Alice-bot to answer all my email for me,
 and see how long it takes people to notice.
 
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