2008-07-28 02:22:19 +00:00
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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" Portions of this text are reprinted and reproduced in electronic form
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.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
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.\" Portable Operating System Interface (POSIX), The Open Group Base
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.\" Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of
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.\" Electrical and Electronics Engineers, Inc and The Open Group. In the
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.\" event of any discrepancy between this version and the original IEEE and
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.\" The Open Group Standard, the original IEEE and The Open Group Standard is
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.\" the referee document. The original Standard can be obtained online at
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.\" http://www.opengroup.org/unix/online.html.
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.\"
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.\" $FreeBSD$
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.\"
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2009-11-02 12:35:38 +00:00
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.Dd March 24, 2008
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2008-07-28 02:22:19 +00:00
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.Dt POSIX_SPAWNATTR_INIT 3
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.Os
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.Sh NAME
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.Nm posix_spawnattr_init ,
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.Nm posix_spawnattr_destroy
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.Nd "initialize and destroy spawn attributes object"
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In spawn.h
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.Ft int
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.Fn posix_spawnattr_init "posix_spawnattr_t * attr"
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.Ft int
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.Fn posix_spawnattr_destroy "posix_spawnattr_t * attr"
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.Sh DESCRIPTION
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The
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.Fn posix_spawnattr_init
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function initializes a spawn attributes object
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.Fa attr
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with the default value for all of the individual attributes used by the
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implementation.
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Initializing an already initialized spawn attributes object may cause
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memory to be leaked.
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.Pp
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The
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.Fn posix_spawnattr_destroy
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function destroys a spawn attributes object.
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A destroyed
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.Fa attr
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attributes object can be reinitialized using
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.Fn posix_spawnattr_init .
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The object should not be used after it has been destroyed.
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.Pp
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A spawn attributes object is of type
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.Vt posix_spawnattr_t
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(defined in
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.In spawn.h )
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and is used to specify the inheritance of process attributes across a
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spawn operation.
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.Pp
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The resulting spawn attributes object (possibly modified by setting
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individual attribute values), is used to modify the behavior of
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.Fn posix_spawn
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or
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.Fn posix_spawnp .
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After a spawn attributes object has been used to spawn a process by a
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call to a
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.Fn posix_spawn
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or
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.Fn posix_spawnp ,
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any function affecting the attributes object (including destruction)
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will not affect any process that has been spawned in this way.
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.Sh RETURN VALUES
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Upon successful completion,
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.Fn posix_spawnattr_init
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and
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.Fn posix_spawnattr_destroy
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return zero;
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otherwise, an error number is returned to indicate the error.
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.Sh ERRORS
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The
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.Fn posix_spawnattr_init
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er ENOMEM
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Insufficient memory exists to initialize the spawn file actions object.
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.El
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.Sh SEE ALSO
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.Xr posix_spawn 3 ,
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.Xr posix_spawnp 3
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.Sh STANDARDS
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The
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.Fn posix_spawnattr_init
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and
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.Fn posix_spawnattr_destroy
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functions conform to
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Fn posix_spawnattr_init
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and
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.Fn posix_spawnattr_destroy
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functions first appeared in
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.Fx 8.0 .
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.Sh AUTHORS
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.An Ed Schouten Aq ed@FreeBSD.org
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