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Diffstat (limited to 'libc/pwd_grp/initgroups.c')
-rw-r--r--libc/pwd_grp/initgroups.c67
1 files changed, 32 insertions, 35 deletions
diff --git a/libc/pwd_grp/initgroups.c b/libc/pwd_grp/initgroups.c
index 24dadc18f..bc537069c 100644
--- a/libc/pwd_grp/initgroups.c
+++ b/libc/pwd_grp/initgroups.c
@@ -1,6 +1,8 @@
+/* vi: set sw=4 ts=4: */
/*
* initgroups.c - This file is part of the libc-8086/grp package for ELKS,
* Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
+ * Copyright (C) 2001-2003 Erik Andersen <andersee@debian.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@@ -28,51 +30,46 @@
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
-extern pthread_mutex_t __getgrent_lock;
-# define LOCK pthread_mutex_lock(&__getgrent_lock)
-# define UNLOCK pthread_mutex_unlock(&__getgrent_lock);
+static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
+# define LOCK pthread_mutex_lock(&mylock)
+# define UNLOCK pthread_mutex_unlock(&mylock);
#else
# define LOCK
# define UNLOCK
#endif
-static char *line_buff = NULL;
-static char **members = NULL;
-
int initgroups(__const char *user, gid_t gid)
{
- register struct group *group;
-
- gid_t *group_list = NULL;
- register char **tmp_mem;
- int num_groups;
- int grp_fd;
-
+ gid_t *group_list = NULL;
+ register char **tmp_mem;
+ int num_groups;
+ int grp_fd;
+ static struct group group;
+ static char line_buff[PWD_BUFFER_SIZE];
- if ((grp_fd = open(_PATH_GROUP, O_RDONLY)) < 0)
- return errno;
+ if ((grp_fd = open(_PATH_GROUP, O_RDONLY)) < 0)
+ return errno;
- num_groups = 0;
- group_list = (gid_t *) realloc(group_list, 1);
- group_list[num_groups] = gid;
- LOCK;
- while ((group = __getgrent(grp_fd, line_buff, members)) != NULL)
- {
- if (group->gr_gid != gid)
+ num_groups = 0;
+ group_list = (gid_t *) realloc(group_list, 1);
+ group_list[num_groups] = gid;
+ LOCK;
+ while (__getgrent_r(&group, line_buff, sizeof(line_buff), grp_fd) == 0)
{
- tmp_mem = group->gr_mem;
- while (*tmp_mem != NULL) {
- if (!strcmp(*tmp_mem, user)) {
- num_groups++;
- group_list = (gid_t *) realloc(group_list, num_groups *
- sizeof(gid_t *));
- group_list[num_groups-1] = group->gr_gid;
+ if (group.gr_gid != gid)
+ {
+ tmp_mem = group.gr_mem;
+ while (*tmp_mem != NULL) {
+ if (!strcmp(*tmp_mem, user)) {
+ num_groups++;
+ group_list = (gid_t *) realloc(group_list, num_groups * sizeof(gid_t *));
+ group_list[num_groups-1] = group.gr_gid;
+ }
+ tmp_mem++;
+ }
}
- tmp_mem++;
- }
}
- }
- close(grp_fd);
- UNLOCK;
- return setgroups(num_groups, group_list);
+ close(grp_fd);
+ UNLOCK;
+ return setgroups(num_groups, group_list);
}