118 lines
3.3 KiB
C++
118 lines
3.3 KiB
C++
/*
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* 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
|