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