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Guest
Posted: Wed Jan 02, 2008 5:06 pm Reply with quote
Guest
On Wed, 2 Jan 2008, Mikael Pettersson wrote:
>
> Calling ioctl() from a signal handler should work on any
> proper *NIX, including Linux/Solaris/*BSD/AIX.

No, it isn't listed as async signal safe by POSIX. See the table near the
bottom of
http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html

Tony.
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f.a.n.finch <dot@dotat.at> http://dotat.at/
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SOLE. VERY ROUGH OR HIGH. RAIN OR SHOWERS. MODERATE OR GOOD, OCCASIONALLY
POOR.
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Guest
Posted: Thu Jan 03, 2008 10:12 am Reply with quote
Guest
* Tony Finch:

> On Wed, 2 Jan 2008, Mikael Pettersson wrote:
>>
>> Calling ioctl() from a signal handler should work on any
>> proper *NIX, including Linux/Solaris/*BSD/AIX.
>
> No, it isn't listed as async signal safe by POSIX. See the table near the
> bottom of
> http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html

POSIX only describes the STREAMS ioctl, which is not implemented by
Linux (and probably not by the BSDs, either).
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Guest
Posted: Sat Jan 05, 2008 11:13 am Reply with quote
Guest
On Thu, 3 Jan 2008, Florian Weimer wrote:
>
> POSIX only describes the STREAMS ioctl, which is not implemented by
> Linux (and probably not by the BSDs, either).

The BSD and Solaris manuals list the syscalls that are async-signal-safe
and ioctl isn't one of them. Linux appears not to be sufficiently
carefully documented to say either way.

Tony.
--
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