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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 "utils/file.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
bool android::ReadFileToString(const std::string& path, std::string* content) {
content->clear();
int fd = TEMP_FAILURE_RETRY(open(path.c_str(), O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
if (fd == -1) {
return false;
}
while (true) {
char buf[BUFSIZ];
ssize_t n = TEMP_FAILURE_RETRY(read(fd, &buf[0], sizeof(buf)));
if (n == -1) {
TEMP_FAILURE_RETRY(close(fd));
return false;
}
if (n == 0) {
TEMP_FAILURE_RETRY(close(fd));
return true;
}
content->append(buf, n);
}
}
bool android::WriteStringToFile(const std::string& content, const std::string& path) {
int fd = TEMP_FAILURE_RETRY(open(path.c_str(),
O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW,
DEFFILEMODE));
if (fd == -1) {
return false;
}
const char* p = content.data();
size_t left = content.size();
while (left > 0) {
ssize_t n = TEMP_FAILURE_RETRY(write(fd, p, left));
if (n == -1) {
TEMP_FAILURE_RETRY(close(fd));
return false;
}
p += n;
left -= n;
}
TEMP_FAILURE_RETRY(close(fd));
return true;
}
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