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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/devtools/devtools_pipe/devtools_pipe.h"
#include "build/build_config.h"
#include "content/public/browser/devtools_agent_host.h"
#if BUILDFLAG(IS_WIN)
#include <io.h>
#include <stddef.h>
#include <stdlib.h>
#include "base/win/windows_types.h"
#else
#include <errno.h>
#include <fcntl.h>
#endif
namespace devtools_pipe {
namespace {
#if BUILDFLAG(IS_WIN)
// A class to temporarily override invalid parameters handler called when the
// CRT detects an invalid argument on Windows.
class ScopedInvalidParameterHandlerOverride {
public:
ScopedInvalidParameterHandlerOverride()
: prev_invalid_parameter_handler_(
_set_thread_local_invalid_parameter_handler(
InvalidParameterHandler)) {}
ScopedInvalidParameterHandlerOverride(
const ScopedInvalidParameterHandlerOverride&) = delete;
ScopedInvalidParameterHandlerOverride& operator=(
const ScopedInvalidParameterHandlerOverride&) = delete;
~ScopedInvalidParameterHandlerOverride() {
_set_thread_local_invalid_parameter_handler(
prev_invalid_parameter_handler_);
}
private:
// A do nothing invalid parameter handler that causes CRT routine to return
// error to the caller.
static void InvalidParameterHandler(const wchar_t* expression,
const wchar_t* function,
const wchar_t* file,
unsigned int line,
uintptr_t reserved) {}
const _invalid_parameter_handler prev_invalid_parameter_handler_;
};
#endif // #if BUILDFLAG(IS_WIN)
} // namespace
bool AreFileDescriptorsOpen() {
#if BUILDFLAG(IS_WIN)
ScopedInvalidParameterHandlerOverride invalid_parameter_handler_override;
return reinterpret_cast<HANDLE>(_get_osfhandle(
content::DevToolsAgentHost::kReadFD)) != INVALID_HANDLE_VALUE &&
reinterpret_cast<HANDLE>(_get_osfhandle(
content::DevToolsAgentHost::kWriteFD)) != INVALID_HANDLE_VALUE;
#else
return fcntl(content::DevToolsAgentHost::kReadFD, F_GETFL) != -1 &&
fcntl(content::DevToolsAgentHost::kWriteFD, F_GETFL) != -1;
#endif
}
} // namespace devtools_pipe
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