1 /* Copyright (C) 1989, 1991, 1993 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
24 #include <sys/types.h>
27 /* Initialize the group set for the current user
28 by reading the group database and using all groups
29 of which USER is a member. Also include GROUP. */
31 DEFUN(initgroups, (user, group),
32 CONST char *user AND gid_t group)
38 static PTR info = NULL;
39 register FILE *stream;
40 register struct group *g;
41 gid_t groups[NGROUPS_MAX];
58 while (n < NGROUPS_MAX && (g = __grpread(stream, info)) != NULL)
59 if (g->gr_gid != group)
63 for (m = g->gr_mem; *m != NULL; ++m)
64 if (!strcmp(*m, user))
65 groups[n++] = g->gr_gid;
68 return setgroups(n, groups);