NetBSD Problem Report #45112
From dholland@netbsd.org Sun Jul 3 19:05:17 2011
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Date: Sun, 3 Jul 2011 19:05:17 +0000 (UTC)
From: dholland@netbsd.org
Reply-To: dholland@netbsd.org
To: gnats-bugs@gnats.NetBSD.org
Subject: cgdconfig can return -1 from main
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>Number: 45112
>Category: bin
>Synopsis: cgdconfig can return -1 from main
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: bin-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Jul 03 19:10:00 +0000 2011
>Last-Modified: Mon Jul 04 16:05:02 +0000 2011
>Originator: David A. Holland
>Release: current of 20110703
>Organization:
>Environment:
n/a
>Description:
The end of main() directly returns the return value of various
operation functions, some of which can return -1 on error. However,
just as one should not call exit(-1), one should not return -1 from
main.
Some of these functions may return errnos as well, which doesn't
seem like a good idea to mix with ordinary 0/1 exit codes.
This issue was actually noted by jruoho in chat.
>How-To-Repeat:
code reading
>Fix:
At the bottom of main, check for -1 and return 2 instead? Also, if
there's some real reason to return errnos, perhaps offset them by
16 or something... also, if so these exit codes should be
documented, which they aren't.
>Audit-Trail:
From: Jukka Ruohonen <jruohonen@iki.fi>
To: gnats-bugs@NetBSD.org
Cc: dholland@NetBSD.org
Subject: Re: bin/45112: cgdconfig can return -1 from main
Date: Mon, 4 Jul 2011 19:00:10 +0300
On Sun, Jul 03, 2011 at 07:10:01PM +0000, dholland@NetBSD.org wrote:
> At the bottom of main, check for -1 and return 2 instead? Also, if
> there's some real reason to return errnos, perhaps offset them by
> 16 or something... also, if so these exit codes should be
> documented, which they aren't.
Indeed, do something useful with the exit codes, like print a warning;
at least the following is related: PR bin/28624.
(Contact us)
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