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/*
* Copyright (C) 2015, The Android Open Source Project
*
* 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.
*/
#include "io_delegate.h"
#include <cstring>
#include <fstream>
#include <vector>
#ifdef _WIN32
#include <direct.h>
#else
#include <sys/stat.h>
#include <unistd.h>
#endif
#include <android-base/strings.h>
#include "logging.h"
#include "os.h"
using std::string;
using std::unique_ptr;
using std::vector;
using android::base::Split;
namespace android {
namespace aidl {
bool IoDelegate::GetAbsolutePath(const string& path, string* absolute_path) {
#ifdef _WIN32
char buf[4096];
DWORD path_len = GetFullPathName(path.c_str(), sizeof(buf), buf, nullptr);
if (path_len <= 0 || path_len >= sizeof(buf)) {
LOG(ERROR) << "Failed to GetFullPathName(" << path << ")";
return false;
}
*absolute_path = buf;
return true;
#else
if (path.empty()) {
LOG(ERROR) << "Giving up on finding an absolute path to represent the "
"empty string.";
return false;
}
if (path[0] == OS_PATH_SEPARATOR) {
*absolute_path = path;
return true;
}
char buf[4096];
if (getcwd(buf, sizeof(buf)) == nullptr) {
LOG(ERROR) << "Path of current working directory does not fit in "
<< sizeof(buf) << " bytes";
return false;
}
*absolute_path = buf;
*absolute_path += OS_PATH_SEPARATOR;
*absolute_path += path;
return true;
#endif
}
unique_ptr<string> IoDelegate::GetFileContents(
const string& filename,
const string& content_suffix) const {
unique_ptr<string> contents;
std::ifstream in(filename, std::ios::in | std::ios::binary);
if (!in) {
return contents;
}
contents.reset(new string);
in.seekg(0, std::ios::end);
ssize_t file_size = in.tellg();
contents->resize(file_size + content_suffix.length());
in.seekg(0, std::ios::beg);
// Read the file contents into the beginning of the string
in.read(&(*contents)[0], file_size);
// Drop the suffix in at the end.
contents->replace(file_size, content_suffix.length(), content_suffix);
in.close();
return contents;
}
unique_ptr<LineReader> IoDelegate::GetLineReader(
const string& file_path) const {
return LineReader::ReadFromFile(file_path);
}
bool IoDelegate::FileIsReadable(const string& path) const {
#ifdef _WIN32
// check that the file exists and is not write-only
return (0 == _access(path.c_str(), 0)) && // mode 0=exist
(0 == _access(path.c_str(), 4)); // mode 4=readable
#else
return (0 == access(path.c_str(), R_OK));
#endif
}
bool IoDelegate::CreatedNestedDirs(
const string& caller_base_dir,
const vector<string>& nested_subdirs) const {
string base_dir = caller_base_dir;
if (base_dir.empty()) {
base_dir = ".";
}
for (const string& subdir : nested_subdirs) {
if (base_dir[base_dir.size() - 1] != OS_PATH_SEPARATOR) {
base_dir += OS_PATH_SEPARATOR;
}
base_dir += subdir;
bool success;
#ifdef _WIN32
success = _mkdir(base_dir.c_str()) == 0;
#else
success = mkdir(base_dir.c_str(),
S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) == 0;
#endif
// On darwin when you try to mkdir("/", ...) we get EISDIR.
if (!success && (errno != EEXIST && errno != EISDIR)) {
LOG(ERROR) << "Error while creating " << base_dir << ": "
<< strerror(errno);
return false;
}
}
return true;
}
bool IoDelegate::CreatePathForFile(const string& path) const {
if (path.empty()) {
return true;
}
string absolute_path;
if (!GetAbsolutePath(path, &absolute_path)) {
return false;
}
auto directories = Split(absolute_path, string{1u, OS_PATH_SEPARATOR});
// The "base" directory is just the root of the file system. On Windows,
// this will look like "C:\" but on Unix style file systems we get an empty
// string after splitting "/foo" with "/"
string base = directories[0];
if (base.empty()) {
base = "/";
}
directories.erase(directories.begin());
// Remove the actual file in question, we're just creating the directory path.
directories.pop_back();
return CreatedNestedDirs(base, directories);
}
unique_ptr<CodeWriter> IoDelegate::GetCodeWriter(
const string& file_path) const {
return GetFileWriter(file_path);
}
void IoDelegate::RemovePath(const std::string& file_path) const {
#ifdef _WIN32
_unlink(file_path.c_str());
#else
unlink(file_path.c_str());
#endif
}
} // namespace android
} // namespace aidl
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