71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/platform_file.h"
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#ifdef ANDROID
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#include <linux/stat.h>
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#endif
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#include "base/logging.h"
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#include "base/string_util.h"
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namespace base {
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// TODO(erikkay): does it make sense to support PLATFORM_FILE_EXCLUSIVE_* here?
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PlatformFile CreatePlatformFile(const std::wstring& name,
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int flags,
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bool* created) {
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int open_flags = 0;
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if (flags & PLATFORM_FILE_CREATE)
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open_flags = O_CREAT | O_EXCL;
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if (flags & PLATFORM_FILE_CREATE_ALWAYS) {
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DCHECK(!open_flags);
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open_flags = O_CREAT | O_TRUNC;
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}
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if (!open_flags && !(flags & PLATFORM_FILE_OPEN) &&
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!(flags & PLATFORM_FILE_OPEN_ALWAYS)) {
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NOTREACHED();
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errno = ENOTSUP;
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return kInvalidPlatformFileValue;
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}
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if (flags & PLATFORM_FILE_WRITE && flags & PLATFORM_FILE_READ) {
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open_flags |= O_RDWR;
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} else if (flags & PLATFORM_FILE_WRITE) {
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open_flags |= O_WRONLY;
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} else if (!(flags & PLATFORM_FILE_READ)) {
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NOTREACHED();
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}
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DCHECK(O_RDONLY == 0);
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int descriptor = open(WideToUTF8(name).c_str(), open_flags,
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S_IRUSR | S_IWUSR);
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if (flags & PLATFORM_FILE_OPEN_ALWAYS) {
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if (descriptor > 0) {
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if (created)
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*created = false;
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} else {
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open_flags |= O_CREAT;
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descriptor = open(WideToUTF8(name).c_str(), open_flags,
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S_IRUSR | S_IWUSR);
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if (created && descriptor > 0)
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*created = true;
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}
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}
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return descriptor;
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}
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} // namespace base
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