1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586 |
- /* vi: set sw=4 ts=4: */
- /*
- * getgrnam.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
- * 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 <features.h>
- #include <unistd.h>
- #include <string.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <paths.h>
- #include "config.h"
- #ifdef __UCLIBC_HAS_THREADS__
- #include <pthread.h>
- 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
- int getgrnam_r (const char *name, struct group *group,
- char *buff, size_t buflen, struct group **result)
- {
- int ret;
- int group_fd;
- *result = NULL;
- if (name == NULL) {
- return EINVAL;
- }
- if ((group_fd = open(_PATH_GROUP, O_RDONLY)) < 0) {
- return ENOENT;
- }
- while ((ret=__getgrent_r(group, buff, buflen, group_fd)) == 0) {
- if (!strcmp(group->gr_name, name)) {
- close(group_fd);
- *result = group;
- return 0;
- }
- }
- close(group_fd);
- return ret;
- }
- struct group *getgrnam(const char *name)
- {
- int ret;
- static char line_buff[PWD_BUFFER_SIZE];
- static struct group grp;
- struct group *result;
- LOCK;
- if ((ret=getgrnam_r(name, &grp, line_buff, sizeof(line_buff), &result)) == 0) {
- UNLOCK;
- return &grp;
- }
- __set_errno(ret);
- UNLOCK;
- return NULL;
- }
|