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9bccf70c A	1	.\" $NetBSD: setgroups.2,v 1.7 1995/02/27 12:36:49 cgd Exp $
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	34	.\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94
	35	.\"
6d2010ae	36	.Dd September 15, 2010
9bccf70c A	37	.Dt SETGROUPS 2
	38	.Os BSD 4.2
	39	.Sh NAME
	40	.Nm setgroups
	41	.Nd set group access list
	42	.Sh SYNOPSIS
	43	.Fd #include <sys/param.h>
	44	.Fd #include <unistd.h>
	45	.Ft int
	46	.Fn setgroups "int ngroups" "const gid_t *gidset"
	47	.Sh DESCRIPTION
39037602	48	.Fn setgroups
9bccf70c A	49	sets the group access list of the current user process
	50	according to the array
	51	.Fa gidset .
	52	The parameter
	53	.Fa ngroups
	54	indicates the number of entries in the array and must be no
	55	more than
	56	.Dv {NGROUPS_MAX} .
	57	.Pp
	58	Only the super-user may set new groups.
6d2010ae A	59	.Pp
	60	Use of
	61	.Fn setgroups
	62	is highly discouraged.
9bccf70c A	63	.Sh RETURN VALUES
	64	A 0 value is returned on success, -1 on error, with
	65	an error code stored in
	66	.Va errno .
	67	.Sh ERRORS
	68	The
	69	.Fn setgroups
	70	call will fail if:
	71	.Bl -tag -width Er
	72	.It Bq Er EINVAL
	73	The value of
	74	.Fa ngroups
	75	is greater than
	76	.Dv {NGROUPS_MAX} .
	77	.It Bq Er EPERM
	78	The caller is not the super-user.
	79	.It Bq Er EFAULT
	80	The address specified for
	81	.Fa gidset
	82	is outside the process
	83	address space.
	84	.El
	85	.Sh SEE ALSO
	86	.Xr getgroups 2 ,
	87	.Xr initgroups 3
	88	.Sh HISTORY
	89	The
	90	.Fn setgroups
	91	function call appeared in
	92	.Bx 4.2 .