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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromecast/base/error_codes.h"
#include <errno.h>
#include <fcntl.h>
#include <string>
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "chromecast/base/path_utils.h"
namespace chromecast {
namespace {
const char kInitialErrorFile[] = "initial_error";
base::FilePath GetInitialErrorFilePath() {
return GetHomePathASCII(kInitialErrorFile);
}
} // namespace
ErrorCode GetInitialErrorCode() {
std::string initial_error_code_str;
if (!base::ReadFileToString(GetInitialErrorFilePath(),
&initial_error_code_str)) {
return NO_ERROR;
}
int initial_error_code = 0;
if (base::StringToInt(initial_error_code_str, &initial_error_code) &&
initial_error_code >= NO_ERROR && initial_error_code <= ERROR_UNKNOWN) {
DVLOG(1) << "Initial error from " << GetInitialErrorFilePath().value()
<< ": " << initial_error_code;
return static_cast<ErrorCode>(initial_error_code);
}
LOG(ERROR) << "Unknown initial error code: " << initial_error_code_str;
return NO_ERROR;
}
bool SetInitialErrorCode(ErrorCode initial_error_code) {
// Note: Do not use Chromium IO methods in this function. When cast_shell
// crashes, this function can be called by any thread.
const std::string error_file_path = GetInitialErrorFilePath().value();
if (initial_error_code > NO_ERROR && initial_error_code <= ERROR_UNKNOWN) {
const std::string initial_error_code_str(
base::NumberToString(initial_error_code));
int fd = creat(error_file_path.c_str(), 0640);
if (fd < 0) {
PLOG(ERROR) << "Could not open error code file";
return false;
}
int written =
write(fd, initial_error_code_str.data(), initial_error_code_str.size());
if (written != static_cast<int>(initial_error_code_str.size())) {
PLOG(ERROR) << "Could not write error code to file: written=" << written
<< ", expected=" << initial_error_code_str.size();
close(fd);
return false;
}
close(fd);
return true;
}
// Remove initial error file if no error.
if (unlink(error_file_path.c_str()) == 0 || errno == ENOENT)
return true;
PLOG(ERROR) << "Failed to remove error file";
return false;
}
} // namespace chromecast
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