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	27	.\"
	28	.\" @(#)posix_spawnattr_setpgroup.3
	29	.
	30	.Dd August 22, 2007
	31	.Dt POSIX_SPAWNATTR_SETPGROUP 3
	32	.Os "Mac OS X"
	33	.Sh NAME
	34	.Nm posix_spawnattr_setpgroup
	35	.Nm posix_spawnattr_getpgroup
	36	.Nd set or get the
	37	.Em spawn-pgroup
	38	attribute on a
	39	.Em posix_spawnattr_t
	40	.Sh SYNOPSIS
	41	.Fd #include <spawn.h>
	42	.Ft int
	43	.Fo posix_spawnattr_setpgroup
	44	.Fa "posix_spawnattr_t *attr"
	45	.Fa "pid_t pgroup"
	46	.Fc
	47	.Ft int
	48	.Fo posix_spawnattr_getpgroup
	49	.Fa "const posix_spawnattr_t *restrict attr"
	50	.Fa "pid_t *restrict pgroup"
	51	.Fc
	52	.Sh DESCRIPTION
	53	The
	54	.Fn posix_spawnattr_setpgroup
	55	function sets the
	56	.Fa pgroup
	57	on the attributes object referenced by
	58	.Fa attr .
	59	.Pp
	60	The
	61	.Fn posix_spawnattr_getpgroup
	62	function retrieves the
	63	.Fa pgroup
	64	on the attributes object referenced by
	65	.Fa attr .
	66	.Pp
	67	The argument
	68	.Fa pgroup
	69	is the process group to be joined or created when the new process is
	70	created if the
	71	.Em POSIX_SPAWN_SETPGROUP
	72	flag is set in the
	73	.Em posix_spawnattr_t
	74	via a call to
	75	.Xr posix_spawnattr_setflags 3 ;
	76	its default value is 0, which means a new process group will be created.
	77	.Sh RETURN VALUES
	78	On success, these functions return 0; on failure they return an error
	79	number from
	80	.In errno.h .
	81	Additionally, if successful,
	82	.Fn posix_spawnattr_getpgroup
	83	will modify the contents of the
	84	.Fa pgroup
	85	parameter with the current attribute value.
	86	.Sh ERRORS
	87	These functions may fail if:
	88	.Bl -tag -width Er
	89	.\" ==========
	90	.It Bq Er EINVAL
	91	The value specified by
	92	.Fa attr
	93	is invalid.
	94	.\" ==========
	95	.It Bq Er EINVAL
	96	The value of
	97	.Fa attr
	98	is invalid.
	99	.El
	100	.Sh SEE ALSO
	101	.Xr posix_spawn 2 ,
	102	.Xr posix_spawnp 2 ,
	103	.Xr posix_spawnattr_init 3 ,
	104	.Xr posix_spawnattr_destroy 3 ,
	105	.Xr posix_spawnattr_setflags 3
	106	.Sh STANDARDS
	107	.St -susv3 [SPN]
	108	.Sh HISTORY
	109	The
	110	.Fn posix_spawnattr_setpgroup
	111	and
	112	.Fn posix_spawnattr_getpgroup
	113	function calls appeared in
	114	.St -susv3 [SPN] .