Re: LINE_MAX

[Vincent Lefevre <vincent@vinc17.net>]

On 2024-05-20 23:49:13 +0200, Alejandro Colomar wrote:
> I think I found a bug in POSIX.1-2017 (and probably, previous ones too,
> but didn't check).

I already reported the issue in 2009 about the example:

> However:
> <https://pubs.opengroup.org/onlinepubs/009695399/functions/fgets.html>:
> The following sections are informative.
> EXAMPLES
> 
>     Reading Input
> 
>     The following example uses fgets() to read each line of input. {LINE_MAX}, which defines the maximum size of the input line, is defined in the <limits.h> header.
> 
>     #include <stdio.h>
>     ...
>     char line[LINE_MAX];
>     ...
>     while (fgets(line, LINE_MAX, fp) != NULL) {
>     ...
>     }
>     ...

See thread "fgets/strtok and LINE_MAX" I started on 2009-09-21
in the Austin Group mailing-list. It is available on gmane:

Path: news.gmane.org!not-for-mail
From: Vincent Lefevre <vincent-opgr-opTGSl+ZDNkdnm+yROfE0A@public.gmane.org>
Newsgroups: gmane.comp.standards.posix.austin.general
Subject: fgets/strtok and LINE_MAX
Date: Mon, 21 Sep 2009 01:03:13 +0200
Lines: 31
Approved: news@gmane.org
Message-ID: <20090920230313.GV657@prunille.vinc17.org>
[...]

There's the issue with the missing "+1", but also whether
LINE_MAX < INT_MAX.

See also
  https://www.austingroupbugs.net/view.php?id=182

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Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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