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 ele-
ment 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 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
Mac OS X 10.9.1 - Generated Fri Jan 10 10:51:54 CST 2014