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.\"     @(#)posix_spawnattr_setspecialport_np.3
.
.Dd August 22, 2007
.Dt POSIX_SPAWNATTR_SETSPECIALPORT_NP 3
.Os "Mac OS X"
.Sh NAME
.Nm posix_spawnattr_setspecialport_np
.Nm posix_spawnattr_setexceptionports_np
.Nd set or get the
.Em spawn-binpref
attribute on a
.Em posix_spawnattr_t
.Sh SYNOPSIS
.Fd #include <spawn.h>
.Ft int
.Fo posix_spawnattr_setspecialport_np
.Fa "posix_spawnattr_t *attr"
.Fa "mach_port_t new_port"
.Fa "int which"
.Fc
.Ft int
.Fo posix_spawnattr_setexceptionports_np
.Fa "posix_spawnattr_t *attr"
.Fa "exception_mask_t mask"
.Fa "mach_port_t new_port"
.Fa "exception_behavior_t behavior"
.Fa "thread_state_flavor_t flavor"
.Fc
.Sh IMPORTANT
These functions represent an Apple extension to
.Xr posix_spawn 2
and
.Xr posix_spawnp 2 ,
and as such should not be used by programs intending their code to be
portable to other platforms.
.Sh DESCRIPTION
The
.Fn posix_spawnattr_setspecialport_np
function sets a new value for a
.Em Mach
special port into the value referenced by
.Fa attr
to the port referenced by
.Fa new_port
for a port value of
.Fa which ,
as if the new process had called
.Fn task_set_special_port .
.Pp
The
.Fn posix_spawnattr_setexceptionports_np
function sets the
.Em Mach
port to
.Fa new_port
for a number of exception ports represented by the bitfield
.Fa mask ,
and sets the new default
.Fa behavior
and default
.Fa flavor ,
as if the new process had called
.Fn task_set_exception_ports .
.Pp
.Sh RETURN VALUES
On success, these functions return 0; on failure they return an error
number from
.In errno.h .
.Sh ERRORS
These functions may fail if:
.Bl -tag -width Er
.\" ==========
.It Bq Er EINVAL
The value specified by
.Fa attr
is invalid.
.\" ==========
.It Bq Er EINVAL
The value of
.Fa attr
is invalid.
.\" ==========
.It Bq Er ENOMEM
Insufficient resources exist to set the ports.
.El
.Sh SEE ALSO
.Xr posix_spawn 2 ,
.Xr posix_spawnp 2 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_destroy 3
.Sh STANDARDS
Nonstandard
.Sh HISTORY
The
.Fn posix_spawnattr_setspecialport_np
and
.Fn posix_spawnattr_setexceptionports_np
function calls appeared in Mac OS X.