util-lib: split out image dissecting code and loopback code from nspawn

[thirdparty/systemd.git] / src / shared / loop-util.h

#pragma once

/***
  This file is part of systemd.

  Copyright 2016 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include "macro.h"

typedef struct LoopDevice LoopDevice;

/* Some helpers for setting up loopback block devices */

struct LoopDevice {
        int fd;
        int nr;
        char *node;
};

int loop_device_make(int fd, int open_flags, LoopDevice **ret);
int loop_device_make_by_path(const char *path, int open_flags, LoopDevice **ret);

LoopDevice* loop_device_unref(LoopDevice *d);

DEFINE_TRIVIAL_CLEANUP_FUNC(LoopDevice*, loop_device_unref);