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// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// 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.
// Adapted from base/platform_file_posix.cc
#ifndef STARBOARD_SHARED_POSIX_IMPL_FILE_OPEN_H_
#define STARBOARD_SHARED_POSIX_IMPL_FILE_OPEN_H_
#include "starboard/file.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "starboard/log.h"
#include "starboard/shared/posix/handle_eintr.h"
#include "starboard/shared/internal_only.h"
#include "starboard/shared/posix/impl/file_impl.h"
namespace starboard {
namespace shared {
namespace posix {
namespace impl {
SbFile FileOpen(const char* path,
int flags,
bool* out_created,
SbFileError* out_error) {
int open_flags = 0;
if (flags & kSbFileCreateOnly) {
open_flags = O_CREAT | O_EXCL;
}
if (out_created) {
*out_created = false;
}
if (flags & kSbFileCreateAlways) {
SB_DCHECK(!open_flags);
open_flags = O_CREAT | O_TRUNC;
}
if (flags & kSbFileOpenTruncated) {
SB_DCHECK(!open_flags);
SB_DCHECK(flags & kSbFileWrite);
open_flags = O_TRUNC;
}
if (!open_flags && !(flags & kSbFileOpenOnly) &&
!(flags & kSbFileOpenAlways)) {
SB_NOTREACHED();
errno = EOPNOTSUPP;
if (out_error) {
*out_error = kSbFileErrorFailed;
}
return kSbFileInvalid;
}
if (flags & kSbFileWrite && flags & kSbFileRead) {
open_flags |= O_RDWR;
} else if (flags & kSbFileWrite) {
open_flags |= O_WRONLY;
}
SB_COMPILE_ASSERT(O_RDONLY == 0, O_RDONLY_must_equal_zero);
int mode = S_IRUSR | S_IWUSR;
int descriptor = HANDLE_EINTR(open(path, open_flags, mode));
if (flags & kSbFileOpenAlways) {
if (descriptor < 0) {
open_flags |= O_CREAT;
descriptor = HANDLE_EINTR(open(path, open_flags, mode));
if (out_created && descriptor >= 0) {
*out_created = true;
}
}
}
if (out_created && (descriptor >= 0) &&
(flags & (kSbFileCreateAlways | kSbFileCreateOnly))) {
*out_created = true;
}
if (out_error) {
if (descriptor >= 0) {
*out_error = kSbFileOk;
} else {
switch (errno) {
case EACCES:
case EISDIR:
case EROFS:
case EPERM:
*out_error = kSbFileErrorAccessDenied;
break;
case ETXTBSY:
*out_error = kSbFileErrorInUse;
break;
case EEXIST:
*out_error = kSbFileErrorExists;
break;
case ENOENT:
*out_error = kSbFileErrorNotFound;
break;
case EMFILE:
*out_error = kSbFileErrorTooManyOpened;
break;
case ENOMEM:
*out_error = kSbFileErrorNoMemory;
break;
case ENOSPC:
*out_error = kSbFileErrorNoSpace;
break;
case ENOTDIR:
*out_error = kSbFileErrorNotADirectory;
break;
default:
*out_error = kSbFileErrorFailed;
}
}
}
if (descriptor < 0) {
return kSbFileInvalid;
}
SbFile result = new SbFilePrivate();
result->descriptor = descriptor;
return result;
}
} // namespace impl
} // namespace posix
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_POSIX_IMPL_FILE_OPEN_H_