posix_spawnattr_destroy(3) [osx man page]

POSIX_SPAWNATTR_INIT(3) 				   BSD Library Functions Manual 				   POSIX_SPAWNATTR_INIT(3)

NAME

     posix_spawnattr_init posix_spawnattr_destroy -- initialize or destroy a spawn attributes object

SYNOPSIS

     #include <spawn.h>

     int
     posix_spawnattr_init(posix_spawnattr_t *attr);

     int
     posix_spawnattr_destroy(posix_spawnattr_t *attr);

DESCRIPTION

     The posix_spawnattr_init() function initializes the object referenced by attr, to an empty set of spawn attributes for subsequent use in a
     call to posix_spawn(2) or posix_spawnp(2).

     A posix_spawnattr_t object is an opaque type that is used to collect set of spawn attributes specified by calls to
     posix_spawnattr_setflags(3), posix_spawnattr_setpgroup(3), posix_spawnattr_setsigdefault(3), posix_spawnattr_setsigmask(3),
     posix_spawnattr_setbinpref_np(3), posix_spawnattr_setspecialport_np(3), or posix_spawnattr_setexceptionports_np(3) such that once the spawn
     operation is complete, the child process will have a different set of attributes than the parent.	The order of these operations is unspeci-
     fied and may change; programs should not depend on their ordering.

     The posix_spawnattr_destroy() function destroys the object referenced by attr which was previously intialized by posix_spawnattr_init(),
     returning any resources obtained at the time of initialization to the system for subsequent reuse.  A posix_spawnattr_t may be reinitialized
     after having been destroyed, but must not be reused after destruction, unless it has been reinitialized.

RETURN VALUES

     On success, these functions return 0; on failure they return an error number from <errno.h>.

ERRORS

     The posix_spawnattr_init() and posix_spawnattr_destroy() functions will fail and return an error if:

     [ENOMEM]		Insufficient resources to initialize the posix_spawnattr_t object.

     [EINVAL]		The posix_spawnattr_t being destroyed is invalid.

SEE ALSO

     posix_spawn(2), posix_spawnp(2), posix_spawnattr_setflags(3), posix_spawnattr_setpgroup(3), posix_spawnattr_setsigdefault(3),
     posix_spawnattr_setsigmask(3), posix_spawnattr_setbinpref_np(3), posix_spawnattr_setspecialport_np(3),
     posix_spawnattr_setexceptionports_np(3)

STANDARDS

     Version 3 of the Single UNIX Specification (``SUSv3'') [SPN]

HISTORY

     The posix_spawn() and posix_spawnp() function calls appeared in Version 3 of the Single UNIX Specification (``SUSv3'') [SPN].

Mac OS X							  August 22, 2007							  Mac OS X

POSIX_SPAWNATTR_INIT(3) 				   BSD Library Functions Manual 				   POSIX_SPAWNATTR_INIT(3)

NAME

     posix_spawnattr_init, posix_spawnattr_destroy -- initialize and destroy spawn attributes object

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <spawn.h>

     int
     posix_spawnattr_init(posix_spawnattr_t * attr);

     int
     posix_spawnattr_destroy(posix_spawnattr_t * attr);

DESCRIPTION

     The posix_spawnattr_init() function initializes a spawn attributes object attr with the default value for all of the individual attributes
     used by the implementation.  Initializing an already initialized spawn attributes object may cause memory to be leaked.

     The posix_spawnattr_destroy() function destroys a spawn attributes object.  A destroyed attr attributes object can be reinitialized using
     posix_spawnattr_init().  The object should not be used after it has been destroyed.

     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.

     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) will not affect any process that has been spawned in
     this way.

RETURN VALUES

     Upon successful completion, posix_spawnattr_init() and posix_spawnattr_destroy() return zero; otherwise, an error number is returned to indi-
     cate the error.

ERRORS

     The posix_spawnattr_init() function will fail if:

     [ENOMEM]		Insufficient memory exists to initialize the spawn attributes object.

SEE ALSO

     posix_spawn(3), posix_spawnp(3)

STANDARDS

     The posix_spawnattr_init() and posix_spawnattr_destroy() functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY

     The posix_spawnattr_init() and posix_spawnattr_destroy() functions first appeared in FreeBSD 8.0.

AUTHORS

     Ed Schouten <ed@FreeBSD.org>

BSD
								  March 24, 2008							       BSD