# posix_spawnattr_destroy

## 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.
    


## NAME



           posix_spawnattr_destroy, posix_spawnattr_init — destroy and
           initialize spawn attributes object (**ADVANCED REALTIME**)
    


## SYNOPSIS



           #include <spawn.h>
    
           int posix_spawnattr_destroy(posix_spawnattr_t *_attr_);
           int posix_spawnattr_init(posix_spawnattr_t *_attr_);
    


## DESCRIPTION



           The _posix_spawnattr_destroy_() function shall destroy a spawn
           attributes object. A destroyed _attr_ attributes object can be
           reinitialized using _posix_spawnattr_init_(); the results of
           otherwise referencing the object after it has been destroyed are
           undefined. An implementation may cause _posix_spawnattr_destroy_()
           to set the object referenced by _attr_ to an invalid value.
    
           The _posix_spawnattr_init_() function shall initialize a spawn
           attributes object _attr_ with the default value for all of the
           individual attributes used by the implementation. Results are
           undefined if _posix_spawnattr_init_() is called specifying an
           already initialized _attr_ attributes object.
    
           A spawn attributes object is of type **posix_spawnattr_t**(defined in
           _< spawn.h>_) and is used to specify the inheritance of process
           attributes across a spawn operation. POSIX.1‐2008 does not define
           comparison or assignment operators for the type **posix_spawnattr_t**.
    
           Each implementation shall document the individual attributes it
           uses and their default values unless these values are defined by
           POSIX.1‐2008.  Attributes not defined by POSIX.1‐2008, their
           default values, and the names of the associated functions to get
           and set those attribute values are implementation-defined.
    
           The resulting spawn attributes object (possibly modified by
           setting individual attribute values), is used to modify the
           behavior of _posix_spawn_() or _posix_spawnp_().  After a spawn
           attributes object has been used to spawn a process by a call to a
           _posix_spawn_() or _posix_spawnp_(), any function affecting the
           attributes object (including destruction) shall not affect any
           process that has been spawned in this way.
    


## RETURN VALUE



           Upon successful completion, _posix_spawnattr_destroy_() and
           _posix_spawnattr_init_() shall return zero; otherwise, an error
           number shall be returned to indicate the error.
    


## ERRORS



           The _posix_spawnattr_init_() function shall fail if:
    
           **ENOMEM** Insufficient memory exists to initialize the spawn
                  attributes object.
    
           The _posix_spawnattr_destroy_() function may fail if:
    
           **EINVAL** The value specified by attr is invalid.
    
           _The following sections are informative._
    


## EXAMPLES



           None.
    


## APPLICATION USAGE



           These functions are part of the Spawn option and need not be
           provided on all implementations.
    


## RATIONALE



           The original spawn interface proposed in POSIX.1‐2008 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 _spawn-schedparam_ and _spawn-schedpolicy_
           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 **posix_spawnattr_t** ,
           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.
    


## FUTURE DIRECTIONS



           None.
    


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