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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/file_util.h"
#include <fcntl.h>
#include <string>
#include <vector>
#include "base/eintr_wrapper.h"
#include "base/file_path.h"
#include "base/string_util.h"
namespace file_util {
bool GetTempDir(FilePath* path) {
const char* tmp = getenv("TMPDIR");
if (tmp)
*path = FilePath(tmp);
else
*path = FilePath("/tmp");
return true;
}
bool GetShmemTempDir(FilePath* path) {
*path = FilePath("/dev/shm");
return true;
}
bool CopyFile(const FilePath& from_path, const FilePath& to_path) {
int infile = open(from_path.value().c_str(), O_RDONLY);
if (infile < 0)
return false;
int outfile = creat(to_path.value().c_str(), 0666);
if (outfile < 0) {
close(infile);
return false;
}
const size_t kBufferSize = 32768;
std::vector<char> buffer(kBufferSize);
bool result = true;
while (result) {
ssize_t bytes_read = HANDLE_EINTR(read(infile, &buffer[0], buffer.size()));
if (bytes_read < 0) {
result = false;
break;
}
if (bytes_read == 0)
break;
// Allow for partial writes
ssize_t bytes_written_per_read = 0;
do {
ssize_t bytes_written_partial = HANDLE_EINTR(write(
outfile,
&buffer[bytes_written_per_read],
bytes_read - bytes_written_per_read));
if (bytes_written_partial < 0) {
result = false;
break;
}
bytes_written_per_read += bytes_written_partial;
} while (bytes_written_per_read < bytes_read);
}
if (HANDLE_EINTR(close(infile)) < 0)
result = false;
if (HANDLE_EINTR(close(outfile)) < 0)
result = false;
return result;
}
} // namespace file_util
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