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posix_spawnattr_destroy(3) [osx man page]

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

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

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posix_spawnattr_destroy(3C)				   Standard C Library Functions 			       posix_spawnattr_destroy(3C)

posix_spawnattr_destroy, posix_spawnattr_init - destroy and initialize spawn attributes object 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 destroys 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 can cause posix_spawnattr_destroy() to set the object referenced by attr to an invalid value. 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. 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. No attributes other than those defined by IEEE Std 1003.1-200x are provided. The resulting spawn attributes object (possibly modified by setting individual attribute values), is used to modify the behavior of posix_spawn(3C) or posix_spawnp(3C). After a spawn attributes object has been used to spawn a process by a call to 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_destroy() and posix_spawnattr_init() return 0. 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. The posix_spawnattr_destroy() function may fail if: EINVAL The value specified by attr is invalid. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
posix_spawn(3C), posix_spawnattr_getflags(3C), posix_spawnattr_getpgroup(3C), posix_spawnattr_getschedparam(3C), posix_spawnattr_getsched- policy(3C), posix_spawnattr_getsigdefault(3C), posix_spawnattr_getsigmask(3C), attributes(5), standards(5) SunOS 5.11 30 Jan 2004 posix_spawnattr_destroy(3C)
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