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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "POSIX_SPAWNATTR_DESTROY" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" posix_spawnattr_destroy 
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.SH NAME
+posix_spawnattr_destroy, posix_spawnattr_init \- destroy and initialize
+spawn attributes object (\fBADVANCED
+REALTIME\fP)
+.SH SYNOPSIS
+.LP
+\fB#include <spawn.h>
+.br
+.sp
+int posix_spawnattr_destroy(posix_spawnattr_t *\fP\fIattr\fP\fB);
+.br
+int posix_spawnattr_init(posix_spawnattr_t *\fP\fIattr\fP\fB); \fP
+\fB
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIposix_spawnattr_destroy\fP() function shall destroy a spawn
+attributes object. A destroyed \fIattr\fP attributes object
+can be reinitialized using \fIposix_spawnattr_init\fP(); the results
+of otherwise referencing the object after it has been
+destroyed are undefined. An implementation may cause \fIposix_spawnattr_destroy\fP()
+to set the object referenced by \fIattr\fP
+to an invalid value.
+.LP
+The \fIposix_spawnattr_init\fP() function shall initialize a spawn
+attributes object \fIattr\fP with the default value for all
+of the individual attributes used by the implementation. Results are
+undefined if \fIposix_spawnattr_init\fP() is called
+specifying an already initialized \fIattr\fP attributes object.
+.LP
+A spawn attributes object is of type \fBposix_spawnattr_t\fP (defined
+in \fI<spawn.h>\fP) and is used to specify the inheritance of process
+attributes across a spawn
+operation. IEEE\ Std\ 1003.1-2001 does not define comparison or assignment
+operators for the type
+\fBposix_spawnattr_t\fP.
+.LP
+Each implementation shall document the individual attributes it uses
+and their default values unless these values are defined by
+IEEE\ Std\ 1003.1-2001. Attributes not defined by IEEE\ Std\ 1003.1-2001,
+their default values, and the names of
+the associated functions to get and set those attribute values are
+implementation-defined.
+.LP
+The resulting spawn attributes object (possibly modified by setting
+individual attribute values), is used to modify the behavior
+of \fIposix_spawn\fP() or \fIposix_spawnp\fP(). After a spawn attributes
+object has been used to spawn a process by a
+call to a \fIposix_spawn\fP() or \fIposix_spawnp\fP(), any function
+affecting the attributes object (including destruction)
+shall not affect any process that has been spawned in this way.
+.SH RETURN VALUE
+.LP
+Upon successful completion, \fIposix_spawnattr_destroy\fP() and \fIposix_spawnattr_init\fP()
+shall return zero; otherwise, an
+error number shall be returned to indicate the error.
+.SH ERRORS
+.LP
+The \fIposix_spawnattr_init\fP() function shall fail if:
+.TP 7
+.B ENOMEM
+Insufficient memory exists to initialize the spawn attributes object.
+.sp
+.LP
+The \fIposix_spawnattr_destroy\fP() function may fail if:
+.TP 7
+.B EINVAL
+The value specified by attr is invalid.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+These functions are part of the Spawn option and need not be provided
+on all implementations.
+.SH RATIONALE
+.LP
+The original spawn interface proposed in IEEE\ Std\ 1003.1-2001 defined
+the attributes that specify the inheritance of
+process attributes across a spawn operation as a structure. In order
+to be able to separate optional individual attributes under
+their appropriate options (that is, the \fIspawn-schedparam\fP and
+\fIspawn-schedpolicy\fP attributes depending upon the Process
+Scheduling option), and also for extensibility and consistency with
+the newer POSIX interfaces, the attributes interface has been
+changed to an opaque data type. This interface now consists of the
+type \fBposix_spawnattr_t\fP, representing a spawn attributes
+object, together with associated functions to initialize or destroy
+the attributes object, and to set or get each individual
+attribute. Although the new object-oriented interface is more verbose
+than the original structure, it is simple to use, more
+extensible, and easy to implement.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIposix_spawn\fP(), \fIposix_spawnattr_getsigdefault\fP(), \fIposix_spawnattr_getflags\fP(),
+\fIposix_spawnattr_getpgroup\fP(), \fIposix_spawnattr_getschedparam\fP(),
+\fIposix_spawnattr_getschedpolicy\fP(), \fIposix_spawnattr_getsigmask\fP(),
+\fIposix_spawnattr_setsigdefault\fP(), \fIposix_spawnattr_setflags\fP(),
+\fIposix_spawnattr_setpgroup\fP(), \fIposix_spawnattr_setsigmask\fP(),
+\fIposix_spawnattr_setschedpolicy\fP(), \fIposix_spawnattr_setschedparam\fP(),
+\fIposix_spawnp\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
+\fI<spawn.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .