.\" $NetBSD: getgroups.2,v 1.8 1995/02/27 12:32:57 cgd Exp $ .\" .\" Copyright (c) 1983, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)getgroups.2 8.2 (Berkeley) 4/16/94 .\" .Dd April 16, 1994 .Dt GETGROUPS 2 .Os BSD 4.2 .Sh NAME .Nm getgroups .Nd get group access list .Sh SYNOPSIS .Fd #include .Ft int .Fo getgroups .Fa "int gidsetsize" .Fa "gid_t grouplist[]" .Fc .Sh DESCRIPTION .Fn Getgroups gets the current group access list of the current user process and stores it in the array .Fa grouplist[] . The parameter .Fa gidsetsize indicates the number of entries that may be placed in .Fa grouplist[] . .Fn Getgroups returns the actual number of groups returned in .Fa grouplist[] . No more than .Dv {NGROUPS_MAX} will ever be returned. If .Fa gidsetsize is 0, .Fn getgroups returns the number of groups without modifying the .Fa grouplist[] array. .Sh RETURN VALUES A successful call returns the number of groups in the group set. Otherwise, a value of -1 is returned and the global integer variable .Va errno is set to indicate the error. .Sh ERRORS The possible errors for .Fn getgroups are: .Bl -tag -width Er .\" ========== .It Bq Er EFAULT The argument .Fa grouplist specifies an invalid address. .\" ========== .It Bq Er EINVAL The argument .Fa gidsetsize , although non-zero, is smaller than the number of groups in the group set. .El .Sh LEGACY SYNOPSIS .Fd #include .Fd #include .Fd #include .Pp The include files .In sys/param.h and .In sys/types.h are necessary. .Sh SEE ALSO .Xr setgroups 2 , .Xr initgroups 3 , .Xr compat 5 .Sh HISTORY The .Fn getgroups function call appeared in .Bx 4.2 .