1243730Srwatson/*- 2243730Srwatson * Copyright (c) 2012 The FreeBSD Foundation 3243730Srwatson * All rights reserved. 4243730Srwatson * 5243730Srwatson * This software was developed by Pawel Jakub Dawidek under sponsorship from 6243730Srwatson * the FreeBSD Foundation. 7243730Srwatson * 8243730Srwatson * Redistribution and use in source and binary forms, with or without 9243730Srwatson * modification, are permitted provided that the following conditions 10243730Srwatson * are met: 11243730Srwatson * 1. Redistributions of source code must retain the above copyright 12243730Srwatson * notice, this list of conditions and the following disclaimer. 13243730Srwatson * 2. Redistributions in binary form must reproduce the above copyright 14243730Srwatson * notice, this list of conditions and the following disclaimer in the 15243730Srwatson * documentation and/or other materials provided with the distribution. 16243730Srwatson * 17243730Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18243730Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19243730Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20243730Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21243730Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22243730Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23243730Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24243730Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25243730Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26243730Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27243730Srwatson * SUCH DAMAGE. 28243730Srwatson * 29243730Srwatson * $P4: //depot/projects/trustedbsd/openbsm/bin/auditdistd/openat.h#1 $ 30243730Srwatson */ 31243730Srwatson 32243730Srwatson#ifndef _OPENAT_H_ 33243730Srwatson#define _OPENAT_H_ 34243730Srwatson 35243730Srwatson#include <fcntl.h> 36243730Srwatson#include <stdarg.h> 37243730Srwatson#include <unistd.h> 38243730Srwatson 39243730Srwatsonstatic int 40243730Srwatsonopenat(int fd, const char *path, int flags, ...) 41243730Srwatson{ 42243730Srwatson int cfd, ffd, error; 43243730Srwatson 44243730Srwatson cfd = open(".", O_RDONLY | O_DIRECTORY); 45243730Srwatson if (cfd == -1) 46243730Srwatson return (-1); 47243730Srwatson 48243730Srwatson if (fchdir(fd) == -1) { 49243730Srwatson error = errno; 50243730Srwatson (void)close(cfd); 51243730Srwatson errno = error; 52243730Srwatson return (-1); 53243730Srwatson } 54243730Srwatson 55243730Srwatson if ((flags & O_CREAT) != 0) { 56243730Srwatson va_list ap; 57243730Srwatson int mode; 58243730Srwatson 59243730Srwatson va_start(ap, flags); 60243730Srwatson mode = va_arg(ap, int); 61243730Srwatson va_end(ap); 62243730Srwatson 63243730Srwatson ffd = open(path, flags, mode); 64243730Srwatson } else { 65243730Srwatson ffd = open(path, flags); 66243730Srwatson } 67243730Srwatson 68243730Srwatson error = errno; 69243730Srwatson (void)fchdir(cfd); 70243730Srwatson (void)close(cfd); 71243730Srwatson errno = error; 72243730Srwatson return (ffd); 73243730Srwatson} 74243730Srwatson 75243730Srwatson#endif /* !_OPENAT_H_ */ 76