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To: Mark Geisert via Cygwin-apps
 <cygwin-apps AT cygwin DOT com>,
        camm AT maguirefamily DOT org
Cc: Mark Geisert <mark AT maxrnd DOT com>,
        The Cygwin Mailing List
 <cygwin AT cygwin DOT com>
Subject: Re: posix_spawn
References: <87plh7x4qp DOT fsf AT maguirefamily DOT org>
 <cd536b39-2eb3-4a9e-b5e3-f0a55bf006ee AT maxrnd DOT com>
Date: Tue, 22 Apr 2025 14:07:23 -0400
In-Reply-To: <cd536b39-2eb3-4a9e-b5e3-f0a55bf006ee@maxrnd.com> (Mark Geisert
 via Cygwin-apps's message of "Mon, 21 Apr 2025 01:21:16 -0700")
Message-ID: <877c3crrxg.fsf@maguirefamily.org>
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From: Camm Maguire via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Camm Maguire <camm AT maguirefamily DOT org>
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Greetings, and thanks so much!

Mark Geisert via Cygwin-apps <cygwin-apps AT cygwin DOT com> writes:

> On 4/19/2025 1:42 PM, Camm Maguire via Cygwin-apps wrote:
>> Greetings!
>> posix_spawn is returning non-zero without setting errno:
>>    massert(!posix_spawnp(&pid, *p1, &file_actions, &attr,  (void
>> *)p1, environ));
>> Is this intended to be supported?  Is it known to be working or not
>> working elsewhere?
>
> This kind of question should be sent to the main Cygwin mailing list
> cygwin AT cygwin DOT com, now CC'd.  Please follow up there if necessary.
>
> On failure, posix_spawnp() returns the error number rather than
> setting errno.  This is a convention followed by some number of the
> posix_*() functions; which ones is a question for readers of the POSIX
> standard ;-).

Indeed, I read the manpage too quickly -- thanks so much for pointing
this out!

=============================================================================
RETURN VALUE
       Upon successful completion, posix_spawn() and posix_spawnp()  place  the
       PID  of  the  child  process in pid, and return 0.  If there is an error
       during the fork() step, then no child is created, the contents  of  *pid
       are unspecified, and these functions return an error number as described
       below.
=============================================================================

Take care,

>
> ..mark
>
>
>

-- 
Camm Maguire			     		    camm AT maguirefamily DOT org
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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