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POSIX_SPAWNATTR_SETBI... BSD Library Functions Manual POSIX_SPAWNATTR_SETBI...

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 standard 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 con-tents contents
     tents 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