/* SPDX-License-Identifier: LGPL-2.1-or-later */

/*

 * This file is part of libmount from util-linux project.

 *

 * Copyright (C) 2008-2018 Karel Zak <kzak@redhat.com>

 *

 * libmount 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.

 */

/**

 * SECTION: version-utils

 * @title: Version functions

 * @short_description: functions to get the library version.

 */

#include <ctype.h>

#include "mountP.h"

static const char *lib_version = LIBMOUNT_VERSION;

static const char *lib_features[] = {

#ifdef HAVE_LIBSELINUX

  "selinux",

#endif

#ifdef HAVE_SMACK

  "smack",

#endif

#ifdef HAVE_BTRFS_SUPPORT

  "btrfs",

#endif

#ifdef HAVE_CRYPTSETUP

  "verity",

#endif

#ifdef USE_LIBMOUNT_SUPPORT_NAMESPACES

  "namespaces",

#endif

#if defined(HAVE_MOUNTFD_API) && defined(HAVE_LINUX_MOUNT_H)

  "idmapping",

#endif

#ifdef USE_LIBMOUNT_MOUNTFD_SUPPORT

  "fd-based-mount",

#endif

#ifdef HAVE_STATMOUNT_API

  "statmount",

#endif

#if defined(HAVE_STATX) && defined(HAVE_STRUCT_STATX) && defined(AT_STATX_DONT_SYNC)

  "statx",

#endif

#ifdef HAVE_STRUCT_FANOTIFY_EVENT_INFO_HEADER

  "fanotify",

#endif

#if !defined(NDEBUG)

  "assert", /* libc assert.h stuff */

#endif

  "debug",  /* always enabled */

  NULL

};

/**

 * mnt_parse_version_string:

 * @ver_string: version string (e.g "2.18.0")

 *

 * Returns: release version code.

 */

int mnt_parse_version_string(const char *ver_string)

{

  const char *cp;

  int version = 0;

  assert(ver_string);

  for (cp = ver_string; *cp; cp++) {

    if (*cp == '.')

      continue;

    if (!isdigit(*cp))

      break;

    version = (version * 10) + (*cp - '0');

  }

  return version;

}

/**

 * mnt_get_library_version:

 * @ver_string: return pointer to the static library version string if not NULL

 *

 * Returns: release version number.

 */

int mnt_get_library_version(const char **ver_string)

{

  if (ver_string)

    *ver_string = lib_version;

  return mnt_parse_version_string(lib_version);

}

/**

 * mnt_get_library_features:

 * @features: returns a pointer to the static array of strings, the array is

 *            terminated by NULL.

 *

 * Returns: number of items in the features array not including the last NULL,

 *          or less than zero in case of error

 *

 * Example:

 * <informalexample>

 *   <programlisting>

 *  const char **features;

 *

 *  mnt_get_library_features(&features);

 *  while (features && *features)

 *    printf("%s\n", *features++);

 *   </programlisting>

 * </informalexample>

 *

 */

int mnt_get_library_features(const char ***features)

{

  if (!features)

    return -EINVAL;

  *features = lib_features;

  return ARRAY_SIZE(lib_features) - 1;

}

#ifdef TEST_PROGRAM

static int test_version(struct libmnt_test *ts __attribute__((unused)),

      int argc, char *argv[])

{

  const char *ver;

  const char **features;

  if (argc == 2)

    printf("Your version: %d\n",

        mnt_parse_version_string(argv[1]));

  mnt_get_library_version(&ver);

  printf("Library version: %s\n", ver);

  printf("Library API version: " LIBMOUNT_VERSION "\n");

  printf("Library features:");

  mnt_get_library_features(&features);

  while (features && *features)

    printf(" %s", *features++);

  printf("\n");

  if (mnt_get_library_version(NULL) ==

      mnt_parse_version_string(LIBMOUNT_VERSION))

    return 0;

  return -1;

}

int main(int argc, char *argv[])

{

  struct libmnt_test ts[] = {

    { "--print", test_version, "print versions" },

    { NULL }

  };

  return mnt_run_test(ts, argc, argv);

}

#endif