2 * Copyright 2014 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/FileUtil.h>
24 #include <sys/socket.h>
26 #include <folly/detail/FileUtilDetail.h>
30 using namespace fileutil_detail;
32 int openNoInt(const char* name, int flags, mode_t mode) {
33 return wrapNoInt(open, name, flags, mode);
36 int closeNoInt(int fd) {
38 // Ignore EINTR. On Linux, close() may only return EINTR after the file
39 // descriptor has been closed, so you must not retry close() on EINTR --
40 // in the best case, you'll get EBADF, and in the worst case, you'll end up
41 // closing a different file (one opened from another thread).
43 // Interestingly enough, the Single Unix Specification says that the state
44 // of the file descriptor is unspecified if close returns EINTR. In that
45 // case, the safe thing to do is also not to retry close() -- leaking a file
46 // descriptor is definitely better than closing the wrong file.
47 if (r == -1 && errno == EINTR) {
53 int fsyncNoInt(int fd) {
54 return wrapNoInt(fsync, fd);
57 int dupNoInt(int fd) {
58 return wrapNoInt(dup, fd);
61 int dup2NoInt(int oldfd, int newfd) {
62 return wrapNoInt(dup2, oldfd, newfd);
65 int fdatasyncNoInt(int fd) {
66 #if defined(__APPLE__)
67 return wrapNoInt(fcntl, fd, F_FULLFSYNC);
68 #elif defined(__FreeBSD__)
69 return wrapNoInt(fsync, fd);
71 return wrapNoInt(fdatasync, fd);
75 int ftruncateNoInt(int fd, off_t len) {
76 return wrapNoInt(ftruncate, fd, len);
79 int truncateNoInt(const char* path, off_t len) {
80 return wrapNoInt(truncate, path, len);
83 int flockNoInt(int fd, int operation) {
84 return wrapNoInt(flock, fd, operation);
87 int shutdownNoInt(int fd, int how) {
88 return wrapNoInt(shutdown, fd, how);
91 ssize_t readNoInt(int fd, void* buf, size_t count) {
92 return wrapNoInt(read, fd, buf, count);
95 ssize_t preadNoInt(int fd, void* buf, size_t count, off_t offset) {
96 return wrapNoInt(pread, fd, buf, count, offset);
99 ssize_t readvNoInt(int fd, const iovec* iov, int count) {
100 return wrapNoInt(writev, fd, iov, count);
103 ssize_t writeNoInt(int fd, const void* buf, size_t count) {
104 return wrapNoInt(write, fd, buf, count);
107 ssize_t pwriteNoInt(int fd, const void* buf, size_t count, off_t offset) {
108 return wrapNoInt(pwrite, fd, buf, count, offset);
111 ssize_t writevNoInt(int fd, const iovec* iov, int count) {
112 return wrapNoInt(writev, fd, iov, count);
115 ssize_t readFull(int fd, void* buf, size_t count) {
116 return wrapFull(read, fd, buf, count);
119 ssize_t preadFull(int fd, void* buf, size_t count, off_t offset) {
120 return wrapFull(pread, fd, buf, count, offset);
123 ssize_t writeFull(int fd, const void* buf, size_t count) {
124 return wrapFull(write, fd, const_cast<void*>(buf), count);
127 ssize_t pwriteFull(int fd, const void* buf, size_t count, off_t offset) {
128 return wrapFull(pwrite, fd, const_cast<void*>(buf), count, offset);
131 ssize_t readvFull(int fd, iovec* iov, int count) {
132 return wrapvFull(readv, fd, iov, count);
135 #if FOLLY_HAVE_PREADV
136 ssize_t preadvFull(int fd, iovec* iov, int count, off_t offset) {
137 return wrapvFull(preadv, fd, iov, count, offset);
141 ssize_t writevFull(int fd, iovec* iov, int count) {
142 return wrapvFull(writev, fd, iov, count);
145 #if FOLLY_HAVE_PWRITEV
146 ssize_t pwritevFull(int fd, iovec* iov, int count, off_t offset) {
147 return wrapvFull(pwritev, fd, iov, count, offset);