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Bug #48820 ttyname_r() configure test unreliable
Submitted: 2009-07-06 16:22 UTC Modified: 2009-07-15 01:00 UTC
Votes:1
Avg. Score:3.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: arekm at maven dot pl Assigned:
Status: No Feedback Package: POSIX related
PHP Version: 5.2.10, 5.3.0 OS: Linux
Private report: No CVE-ID: None
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 [2009-07-06 16:22 UTC] arekm at maven dot pl
Description:
------------
ttyname_r() check done in configure is wrong because it relies on doing build on a terminal. Building on non terminal causes failure.

Reproduce code:
---------------
This is test taken from configure:

[arekm@t400 ~/test/3]$ more a.c
#include <unistd.h>
int main(int argc, char *argv[])
{
        char buf[64];

        return ttyname_r(0, buf, 64) ? 1 : 0;
}

[arekm@t400 ~/test/3]$ gcc a.c
[arekm@t400 ~/test/3]$ ./a.out
[arekm@t400 ~/test/3]$ echo $?
0

success - we are on a terminal

[arekm@t400 ~/test/3]$ ./a.out < /dev/null
zsh: exit 1     ./a.out < /dev/null
[arekm@t400 ~/test/3]$ echo $?
1
[arekm@t400 ~/test/3]$

failure - we are not on terminal


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 [2009-07-07 15:34 UTC] jani@php.net
I feel a bit stupid for asking this..but how/why do you build in non terminal..? :)
 [2009-07-07 18:31 UTC] arekm at maven dot pl
I'm building using rpm and it doesn't provide terminal as stdin to configure - ttyname_r() check fails.
 [2009-07-15 01:00 UTC] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2011-02-20 22:03 UTC] glen at delfi dot ee
The simpliest explanation how to build without terminal: run your build job from 
cron daemon [1] or just use </dev/null as input to configure (as arekm noted) to 
get same result

as of php-5.3.5/ext/posix/config.m4 the detection code is still wrong.

[1] http://en.wikipedia.org/wiki/Cron
 
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