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

Check Out this Related 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

Linux and UNIX Man Pages

posix_spawnattr_setbinpref_np(3) [osx man page]

Check Out this Related Man Page