systemd/src/test/test-btrfs.c

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2014 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 <stdlib.h>
#include <fcntl.h>

#include "log.h"
#include "fileio.h"
#include "util.h"
#include "btrfs-util.h"

int main(int argc, char *argv[]) {
        int r;
        int fd;

        fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
        if (fd < 0)
                log_error_errno(errno, "Failed to open root directory: %m");
        else {
                BtrfsSubvolInfo info;
                char ts[FORMAT_TIMESTAMP_MAX];

                r = btrfs_subvol_get_info_fd(fd, &info);
                if (r < 0)
                        log_error_errno(r, "Failed to get subvolume info: %m");
                else {
                        log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime));
                        log_info("read-only (search): %s", yes_no(info.read_only));
                }

                r = btrfs_subvol_get_read_only_fd(fd);
                if (r < 0)
                        log_error_errno(r, "Failed to get read only flag: %m");
                else
                        log_info("read-only (ioctl): %s", yes_no(r));

                safe_close(fd);
        }

        r = btrfs_subvol_make("/xxxtest");
        if (r < 0)
                log_error_errno(r, "Failed to make subvolume: %m");

        r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha");
        if (r < 0)
                log_error_errno(r, "Failed to write file: %m");

        r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", false, false);
        if (r < 0)
                log_error_errno(r, "Failed to make snapshot: %m");

        r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", true, false);
        if (r < 0)
                log_error_errno(r, "Failed to make snapshot: %m");

        r = btrfs_subvol_remove("/xxxtest");
        if (r < 0)
                log_error_errno(r, "Failed to remove subvolume: %m");

        r = btrfs_subvol_remove("/xxxtest2");
        if (r < 0)
                log_error_errno(r, "Failed to remove subvolume: %m");

        r = btrfs_subvol_remove("/xxxtest3");
        if (r < 0)
                log_error_errno(r, "Failed to remove subvolume: %m");

        r = btrfs_subvol_snapshot("/etc", "/etc2", true, true);
        if (r < 0)
                log_error_errno(r, "Failed to make snapshot: %m");

        r = btrfs_subvol_remove("/etc2");
        if (r < 0)
                log_error_errno(r, "Failed to remove subvolume: %m");

        return 0;
}