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// Copyright (c) 2011, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// file_utils.cc: Implement utility functions for file manipulation.
// See file_utils.h for details.
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "common/linux/eintr_wrapper.h"
#include "common/tests/file_utils.h"
namespace google_breakpad {
bool CopyFile(const char* from_path, const char* to_path) {
int infile = HANDLE_EINTR(open(from_path, O_RDONLY));
if (infile < 0) {
perror("open");
return false;
}
int outfile = HANDLE_EINTR(creat(to_path, 0666));
if (outfile < 0) {
perror("creat");
if (IGNORE_EINTR(close(infile)) < 0) {
perror("close");
}
return false;
}
char buffer[1024];
bool result = true;
while (result) {
ssize_t bytes_read = HANDLE_EINTR(read(infile, buffer, sizeof(buffer)));
if (bytes_read < 0) {
perror("read");
result = false;
break;
}
if (bytes_read == 0)
break;
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) {
perror("write");
result = false;
break;
}
bytes_written_per_read += bytes_written_partial;
} while (bytes_written_per_read < bytes_read);
}
if (IGNORE_EINTR(close(infile)) == -1) {
perror("close");
result = false;
}
if (IGNORE_EINTR(close(outfile)) == -1) {
perror("close");
result = false;
}
return result;
}
bool ReadFile(const char* path, void* buffer, ssize_t* buffer_size) {
int fd = HANDLE_EINTR(open(path, O_RDONLY));
if (fd == -1) {
perror("open");
return false;
}
bool ok = true;
if (buffer && buffer_size && *buffer_size > 0) {
memset(buffer, 0, sizeof(*buffer_size));
*buffer_size = HANDLE_EINTR(read(fd, buffer, *buffer_size));
if (*buffer_size == -1) {
perror("read");
ok = false;
}
}
if (IGNORE_EINTR(close(fd)) == -1) {
perror("close");
ok = false;
}
return ok;
}
bool WriteFile(const char* path, const void* buffer, size_t buffer_size) {
int fd = HANDLE_EINTR(open(path, O_CREAT | O_TRUNC | O_WRONLY, S_IRWXU));
if (fd == -1) {
perror("open");
return false;
}
bool ok = true;
if (buffer) {
size_t bytes_written_total = 0;
ssize_t bytes_written_partial = 0;
const char* data = reinterpret_cast<const char*>(buffer);
while (bytes_written_total < buffer_size) {
bytes_written_partial =
HANDLE_EINTR(write(fd, data + bytes_written_total,
buffer_size - bytes_written_total));
if (bytes_written_partial < 0) {
perror("write");
ok = false;
break;
}
bytes_written_total += bytes_written_partial;
}
}
if (IGNORE_EINTR(close(fd)) == -1) {
perror("close");
ok = false;
}
return ok;
}
} // namespace google_breakpad
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