/* * pwent.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 <unistd.h> #include <stdlib.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 /* * setpwent(), endpwent(), and getpwent() are included in the same object * file, since one cannot be used without the other two, so it makes sense to * link them all in together. */ /* file descriptor for the password file currently open */ static int pw_fd = -1; void setpwent(void) { LOCK; if (pw_fd != -1) close(pw_fd); pw_fd = open(_PATH_PASSWD, O_RDONLY); UNLOCK; } void endpwent(void) { LOCK; if (pw_fd != -1) close(pw_fd); pw_fd = -1; UNLOCK; } int getpwent_r (struct passwd *password, char *buff, size_t buflen, struct passwd **crap) { LOCK; if (pw_fd != -1 && __getpwent_r(password, buff, buflen, pw_fd) != -1) { UNLOCK; return 0; } UNLOCK; return -1; } struct passwd *getpwent(void) { static char line_buff[PWD_BUFFER_SIZE]; static struct passwd pwd; if (getpwent_r(&pwd, line_buff, sizeof(line_buff), NULL) != -1) { return &pwd; } return NULL; }