4.3BSD/usr/man/man3/initgroups.3

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.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)initgroups.3	6.2 (Berkeley) 5/12/86
.\"
.TH INITGROUPS 3 "May 12, 1986"
.UC 5
.SH NAME
initgroups \- initialize group access list
.SH SYNOPSIS
.B initgroups(name, basegid)
.br
.B char *name;
.br
.B int basegid;
.SH DESCRIPTION
.I Initgroups
reads through the group file and sets up,
using the
.IR setgroups (2)
call, the group access list for the user
specified in
.IR name .
The
.I basegid
is automatically included in the groups list.
Typically this value is given as
the group number from the password file.
.SH FILES
/etc/group
.SH SEE ALSO
setgroups(2)
.SH DIAGNOSTICS
.I Initgroups
returns \-1 if it was not invoked by the super-user.
.SH BUGS
.I Initgroups
uses the routines based on
.IR getgrent (3).
If the invoking program uses any of these routines,
the group structure will
be overwritten in the call to
.IR initgroups .