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- /*
- * Copyright 2016-present Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include <folly/portability/Fcntl.h>
- #ifdef _WIN32
- #include <folly/portability/Sockets.h>
- #include <folly/portability/SysStat.h>
- #include <folly/portability/Windows.h>
- namespace folly {
- namespace portability {
- namespace fcntl {
- int creat(char const* fn, int pm) {
- return _creat(fn, pm);
- }
- int fcntl(int fd, int cmd, ...) {
- va_list args;
- int res = -1;
- va_start(args, cmd);
- switch (cmd) {
- case F_GETFD: {
- HANDLE h = (HANDLE)_get_osfhandle(fd);
- if (h != INVALID_HANDLE_VALUE) {
- DWORD flags;
- if (GetHandleInformation(h, &flags)) {
- res = int(flags & HANDLE_FLAG_INHERIT);
- }
- }
- break;
- }
- case F_SETFD: {
- int flags = va_arg(args, int);
- HANDLE h = (HANDLE)_get_osfhandle(fd);
- if (h != INVALID_HANDLE_VALUE) {
- if (SetHandleInformation(
- h, HANDLE_FLAG_INHERIT, (DWORD)(flags & FD_CLOEXEC))) {
- res = 0;
- }
- }
- break;
- }
- case F_GETFL: {
- // No idea how to get the IO blocking mode, so return 0.
- res = 0;
- break;
- }
- case F_SETFL: {
- int flags = va_arg(args, int);
- // If it's not a socket, it's probably a pipe.
- if (folly::portability::sockets::is_fh_socket(fd)) {
- SOCKET s = (SOCKET)_get_osfhandle(fd);
- if (s != INVALID_SOCKET) {
- u_long nonBlockingEnabled = (flags & O_NONBLOCK) ? 1 : 0;
- res = ioctlsocket(s, FIONBIO, &nonBlockingEnabled);
- }
- } else {
- HANDLE p = (HANDLE)_get_osfhandle(fd);
- if (GetFileType(p) == FILE_TYPE_PIPE) {
- DWORD newMode = PIPE_READMODE_BYTE;
- newMode |= (flags & O_NONBLOCK) ? PIPE_NOWAIT : PIPE_WAIT;
- if (SetNamedPipeHandleState(p, &newMode, nullptr, nullptr)) {
- res = 0;
- }
- }
- }
- break;
- }
- }
- va_end(args);
- return res;
- }
- int open(char const* fn, int of, int pm) {
- int fh;
- int realMode = _S_IREAD;
- if ((of & _O_RDWR) == _O_RDWR) {
- realMode = _S_IREAD | _S_IWRITE;
- } else if ((of & _O_WRONLY) == _O_WRONLY) {
- realMode = _S_IWRITE;
- } else if ((of & _O_RDONLY) != _O_RDONLY) {
- // One of these needs to be present, just fail if
- // none are.
- return -1;
- }
- if (!strcmp(fn, "/dev/null")) {
- // Windows doesn't have a /dev/null, but it does have
- // NUL, which achieves the same result.
- fn = "NUL";
- }
- errno_t res = _sopen_s(&fh, fn, of, _SH_DENYNO, realMode);
- return res ? -1 : fh;
- }
- int posix_fallocate(int fd, off_t offset, off_t len) {
- // We'll pretend we always have enough space. We
- // can't exactly pre-allocate on windows anyways.
- return 0;
- }
- } // namespace fcntl
- } // namespace portability
- } // namespace folly
- #endif
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