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- /*
- * initgroups.c - This file is part of the libc-8086/grp package for ELKS,
- * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
- #include <unistd.h>
- #include <string.h>
- #include <fcntl.h>
- #include <paths.h>
- #include "config.h"
- int initgroups(__const char *user, gid_t gid)
- {
- register struct group *group;
- #ifndef GR_DYNAMIC_GROUP_LIST
- gid_t group_list[GR_MAX_GROUPS];
- #else
- gid_t *group_list = NULL;
- #endif
- register char **tmp_mem;
- int num_groups;
- int grp_fd;
- if ((grp_fd = open(_PATH_GROUP, O_RDONLY)) < 0)
- return -1;
- num_groups = 0;
- #ifdef GR_DYNAMIC_GROUP_LIST
- group_list = (gid_t *) realloc(group_list, 1);
- #endif
- group_list[num_groups] = gid;
- #ifndef GR_DYNAMIC_GROUP_LIST
- while (num_groups < GR_MAX_GROUPS &&
- (group = __getgrent(grp_fd)) != NULL)
- #else
- while ((group = __getgrent(grp_fd)) != NULL)
- #endif
- {
- if (group->gr_gid != gid);
- {
- tmp_mem = group->gr_mem;
- while (*tmp_mem != NULL) {
- if (!strcmp(*tmp_mem, user)) {
- num_groups++;
- #ifdef GR_DYNAMIC_GROUP_LIST
- group_list = (gid_t *) realloc(group_list, num_groups *
- sizeof(gid_t *));
- #endif
- group_list[num_groups-1] = group->gr_gid;
- }
- tmp_mem++;
- }
- }
- }
- close(grp_fd);
- return setgroups(num_groups, group_list);
- }
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