/* * Copyright (C) 2003-2010 The Music Player Daemon Project * http://www.musicpd.org * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This library provides easy helper functions for working with file * descriptors. It has wrappers for taking advantage of Linux 2.6 * specific features like O_CLOEXEC. * */ #ifndef FD_UTIL_H #define FD_UTIL_H #include <stdbool.h> #include <stddef.h> #ifndef WIN32 #if !defined(_GNU_SOURCE) && (defined(HAVE_PIPE2) || defined(HAVE_ACCEPT4)) #define _GNU_SOURCE #endif #include <sys/types.h> #endif struct sockaddr; /** * Wrapper for dup(), which sets the CLOEXEC flag on the new * descriptor. */ int dup_cloexec(int oldfd); /** * Wrapper for open(), which sets the CLOEXEC flag (atomically if * supported by the OS). */ int open_cloexec(const char *path_fs, int flags, int mode); /** * Wrapper for pipe(), which sets the CLOEXEC flag (atomically if * supported by the OS). */ int pipe_cloexec(int fd[2]); /** * Wrapper for pipe(), which sets the CLOEXEC flag (atomically if * supported by the OS). * * On systems that supports it (everybody except for Windows), it also * sets the NONBLOCK flag. */ int pipe_cloexec_nonblock(int fd[2]); #ifndef WIN32 /** * Wrapper for socketpair(), which sets the CLOEXEC flag (atomically * if supported by the OS). */ int socketpair_cloexec(int domain, int type, int protocol, int sv[2]); #endif /** * Wrapper for socket(), which sets the CLOEXEC and the NONBLOCK flag * (atomically if supported by the OS). */ int socket_cloexec_nonblock(int domain, int type, int protocol); /** * Wrapper for accept(), which sets the CLOEXEC and the NONBLOCK flags * (atomically if supported by the OS). */ int accept_cloexec_nonblock(int fd, struct sockaddr *address, size_t *address_length_r); #ifndef WIN32 struct msghdr; /** * Wrapper for recvmsg(), which sets the CLOEXEC flag (atomically if * supported by the OS). */ ssize_t recvmsg_cloexec(int sockfd, struct msghdr *msg, int flags); #endif /** * Wrapper for inotify_init(), which sets the CLOEXEC flag (atomically * if supported by the OS). */ int inotify_init_cloexec(void); #endif