1 files changed, 168 insertions, 0 deletions
diff --git a/src/system/fd_util.h b/src/system/fd_util.h
new file mode 100644
index 000000000..9003b1616
--- /dev/null
+++ b/src/system/fd_util.h
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2003-2011 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 "check.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;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * 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]);
+
+/**
+ * Wrapper for socketpair(), which sets the flags CLOEXEC and NONBLOCK
+ * (atomically if supported by the OS).
+ */
+int
+socketpair_cloexec_nonblock(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
+
+#ifdef HAVE_INOTIFY_INIT
+
+/**
+ * Wrapper for inotify_init(), which sets the CLOEXEC flag (atomically
+ * if supported by the OS).
+ */
+int
+inotify_init_cloexec(void);
+
+#endif
+
+#ifdef USE_EVENTFD
+
+/**
+ * Wrapper for eventfd() which sets the flags CLOEXEC and NONBLOCK
+ * flag (atomically if supported by the OS).
+ */
+int
+eventfd_cloexec_nonblock(unsigned initval, int flags);
+
+#endif
+
+/**
+ * Portable wrapper for close(); use closesocket() on WIN32/WinSock.
+ */
+int
+close_socket(int fd);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif