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/*
The MIT License (MIT)
Copyright (c) 2015 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <errno.h>
#include <fcntl.h>
#include <linux/fs.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <string>
using std::string;
namespace fs
{
namespace attr
{
static
int
get_fs_ioc_flags(const int fd,
int &flags)
{
return ::ioctl(fd,FS_IOC_GETFLAGS,&flags);
}
static
int
get_fs_ioc_flags(const string &file,
int &flags)
{
int fd;
int rv;
const int openflags = O_RDONLY|O_NONBLOCK;
fd = ::open(file.c_str(),openflags);
if(fd == -1)
return -1;
rv = get_fs_ioc_flags(fd,flags);
if(rv == -1)
{
int error = errno;
::close(fd);
errno = error;
return -1;
}
return ::close(fd);
}
static
int
set_fs_ioc_flags(const int fd,
const int flags)
{
return ::ioctl(fd,FS_IOC_SETFLAGS,&flags);
}
static
int
set_fs_ioc_flags(const string &file,
const int flags)
{
int fd;
int rv;
const int openflags = O_RDONLY|O_NONBLOCK;
fd = ::open(file.c_str(),openflags);
if(fd == -1)
return -1;
rv = set_fs_ioc_flags(fd,flags);
if(rv == -1)
{
int error = errno;
::close(fd);
errno = error;
return -1;
}
return ::close(fd);
}
int
copy(const int fdin,
const int fdout)
{
int rv;
int flags;
rv = get_fs_ioc_flags(fdin,flags);
if(rv == -1)
return -1;
return set_fs_ioc_flags(fdout,flags);
}
int
copy(const string &from,
const string &to)
{
int rv;
int flags;
rv = get_fs_ioc_flags(from,flags);
if(rv == -1)
return -1;
return set_fs_ioc_flags(to,flags);
}
}
}