/* * 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 <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <pwd.h> #define PWD_BUFFER_SIZE 256 /* file descriptor for the password file currently open */ static char line_buff[PWD_BUFFER_SIZE]; static struct passwd pwd; int getpwuid_r (uid_t uid, struct passwd *password, char *buff, size_t buflen, struct passwd **crap) { int passwd_fd; if ((passwd_fd = open("/etc/passwd", O_RDONLY)) < 0) return -1; while (__getpwent_r(password, buff, buflen, passwd_fd) != -1) if (password->pw_uid == uid) { close(passwd_fd); return 0; } close(passwd_fd); return -1; } struct passwd *getpwuid(uid_t uid) { if (getpwuid_r(uid, &pwd, line_buff, PWD_BUFFER_SIZE, NULL) != -1) { return &pwd; } return NULL; }