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posix_spawnattr_setbinpref_np(3) [osx man page]

POSIX_SPAWNATTR_SETBINPREF_NP(3)			   BSD Library Functions Manual 			  POSIX_SPAWNATTR_SETBINPREF_NP(3)

NAME
posix_spawnattr_setbinpref_np posix_spawnattr_getbinpref_np -- set or get the spawn-binpref attribute on a posix_spawnattr_t SYNOPSIS
#include <spawn.h> int posix_spawnattr_setbinpref_np(posix_spawnattr_t *restrict attr, size_t count, cpu_type_t *pref, size_t *restrict ocount); int posix_spawnattr_getbinpref_np(const posix_spawnattr_t *restrict attr, size_t count, cpu_type_t *pref, size_t * restrict ocount); IMPORTANT
These functions represent an Apple extension to posix_spawn(2) and posix_spawnp(2), and as such should not be used by programs intending their code to be portable to other platforms. DESCRIPTION
The posix_spawnattr_setbinpref_np() function sets the universal binary preferences for the spawn attribute value referenced by attr from the memory containing the cpu_type_t referenced by pref with a size of count elements; the actual number of elements that are set in the attribute is returned in ocount. When spawn(2) or spawnp(2) is subsequently invoked on a Universal binary with the posix_spawnattr_t, the elements which were set will be used, in the order they were set, to select the first element in the list which matches any cpu_type_t of those available in the Universal binary. If there is no match, then the attempt to create the child process will fail with the error EBADARCH. If the cpu_type_t CPU_TYPE_ANY is the last element in the list, then rather than returning EBADARCH on no match, the system will instead fall back to the stan- dard Universal binary grading preference order. The posix_spawnattr_getbinpref_np() function gets the universal binary preferences for the spawn attribute value referenced by attr into the memory containing the cpu_type_t referenced by pref with a prereserved size of count elements; the actual number of elements that are copied from the attribute is returned in ocount. RETURN VALUES
On success, these functions return 0; on failure they return an error number from <errno.h> and modify the value of ocount. Additionally, if successful, posix_spawnattr_getbinpref_np() will modify the contents of the pref array with the current attribute values. ERRORS
These functions may fail if: [EINVAL] The value specified by attr is invalid. [EINVAL] The value of attr is invalid. SEE ALSO
posix_spawn(2), posix_spawnp(2), posix_spawnattr_init(3), posix_spawnattr_destroy(3), posix_spawnattr_setflags(3) STANDARDS
Nonstandard HISTORY
The posix_spawnattr_setbinpref_np() and posix_spawnattr_getbinpref_np() function calls appeared in Mac OS X. Mac OS X August 22, 2007 Mac OS X

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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

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