/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "FileOutputStream.hxx"
#include "fs/FileSystem.hxx"
#include "system/fd_util.h"
#include "util/Error.hxx"
#ifdef WIN32
FileOutputStream::FileOutputStream(Path _path, Error &error)
:path(_path),
handle(CreateFile(path.c_str(), GENERIC_WRITE, 0, nullptr,
TRUNCATE_EXISTING,
FILE_ATTRIBUTE_NORMAL|FILE_FLAG_WRITE_THROUGH,
nullptr))
{
if (handle == INVALID_HANDLE_VALUE)
error.FormatLastError("Failed to create %s", path.c_str());
}
bool
FileOutputStream::Write(const void *data, size_t size, Error &error)
{
assert(IsDefined());
DWORD nbytes;
if (!WriteFile(handle, data, size, &nbytes, nullptr)) {
error.FormatLastError("Failed to write to %s", path.c_str());
return false;
}
if (size_t(nbytes) != size) {
error.FormatLastError(ERROR_DISK_FULL,
"Failed to write to %s", path.c_str());
return false;
}
return true;
}
bool
FileOutputStream::Commit(gcc_unused Error &error)
{
assert(IsDefined());
CloseHandle(handle);
return true;
}
void
FileOutputStream::Cancel()
{
assert(IsDefined());
CloseHandle(handle);
RemoveFile(path);
}
#else
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
FileOutputStream::FileOutputStream(Path _path, Error &error)
:path(_path),
fd(open_cloexec(path.c_str(),
O_WRONLY|O_CREAT|O_TRUNC,
0666))
{
if (fd < 0)
error.FormatErrno("Failed to create %s", path.c_str());
}
bool
FileOutputStream::Write(const void *data, size_t size, Error &error)
{
assert(IsDefined());
ssize_t nbytes = write(fd, data, size);
if (nbytes < 0) {
error.FormatErrno("Failed to write to %s", path.c_str());
return false;
} else if ((size_t)nbytes < size) {
error.FormatErrno(ENOSPC,
"Failed to write to %s", path.c_str());
return false;
}
return true;
}
bool
FileOutputStream::Commit(Error &error)
{
assert(IsDefined());
bool success = close(fd) == 0;
fd = -1;
if (!success)
error.FormatErrno("Failed to commit %s", path.c_str());
return success;
}
void
FileOutputStream::Cancel()
{
assert(IsDefined());
close(fd);
fd = -1;
RemoveFile(path);
}
#endif
