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/*
* getpwuid.c - This file is part of the libc-8086/pwd 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 <features.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <paths.h>
#include <errno.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 getpwuid_r (uid_t uid, struct passwd *password,
char *buff, size_t buflen, struct passwd **result)
{
int passwd_fd;
if ((passwd_fd = open(_PATH_PASSWD, O_RDONLY)) < 0)
return errno;
*result = NULL;
while (__getpwent_r(password, buff, buflen, passwd_fd) == 0)
if (password->pw_uid == uid) {
close(passwd_fd);
*result = password;
return 0;
}
close(passwd_fd);
return EINVAL;
}
struct passwd *getpwuid(uid_t uid)
{
int ret;
/* file descriptor for the password file currently open */
static char line_buff[PWD_BUFFER_SIZE];
static struct passwd pwd;
struct passwd *result;
LOCK;
if ((ret=getpwuid_r(uid, &pwd, line_buff, sizeof(line_buff), &result)) == 0) {
UNLOCK;
return &pwd;
}
UNLOCK;
__set_errno(ret);
return NULL;
}
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