2 * initgroups.c - This file is part of the libc-8086/grp package for ELKS,
3 * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 initgroups(__const char * user, gid_t gid)
30 register struct group * group;
31 #ifndef GR_DYNAMIC_GROUP_LIST
32 gid_t group_list[GR_MAX_GROUPS];
34 gid_t * group_list=NULL;
36 register char ** tmp_mem;
41 if ((grp_fd=open("/etc/group", O_RDONLY))<0)
45 #ifdef GR_DYNAMIC_GROUP_LIST
46 group_list=(gid_t *) realloc(group_list, 1);
48 group_list[num_groups]=gid;
49 #ifndef GR_DYNAMIC_GROUP_LIST
50 while (num_groups<GR_MAX_GROUPS &&
51 (group=__getgrent(grp_fd))!=NULL)
53 while ((group=__getgrent(grp_fd))!=NULL)
56 if (group->gr_gid!=gid);
58 tmp_mem=group->gr_mem;
61 if (!strcmp(*tmp_mem, user))
64 #ifdef GR_DYNAMIC_GROUP_LIST
65 group_list=(gid_t *)realloc(group_list,
66 num_groups*sizeof(gid_t *));
68 group_list[num_groups]=group->gr_gid;
75 return setgroups(num_groups, group_list);