static int plgfs_test_super(struct super_block *sb, void *data)
{
	struct plgfs_mnt_cfg *cfg;
	struct plgfs_sb_info *sbi;
	int i;

	cfg = (struct plgfs_mnt_cfg *)data;
	sbi = plgfs_sbi(sb);

	if (sbi->pdev) {
		if (sbi->pdev->bdev_hidden != cfg->bdev)
			return 0;

	} else if (!path_equal(&sbi->path_hidden, &cfg->path))
		return 0;

	cfg->flags |= PLGFS_OPT_DIFF_PLGS;

	if (sbi->plgs_nr != cfg->plgs_nr)
		return 0;

	for (i = 0; i < cfg->plgs_nr; i++) {
		if (sbi->plgs[i] != cfg->plgs[i])
			return 0;
	}

	cfg->flags &= ~PLGFS_OPT_DIFF_PLGS;

	return 1;
}

int get_user_creds_clean(
                const char **username,
                uid_t *uid, gid_t *gid,
                const char **home,
                const char **shell) {

        int r;

        /* Like get_user_creds(), but resets home/shell to NULL if they don't contain anything relevant. */

        r = get_user_creds(username, uid, gid, home, shell);
        if (r < 0)
                return r;

        if (shell &&
            (isempty(*shell) || PATH_IN_SET(*shell,
                                            "/bin/nologin",
                                            "/sbin/nologin",
                                            "/usr/bin/nologin",
                                            "/usr/sbin/nologin")))
                *shell = NULL;

        if (home &&
            (isempty(*home) || path_equal(*home, "/")))
                *home = NULL;

        return 0;
}

int rm_rf(const char *path, RemoveFlags flags) {
        int fd, r;
        struct statfs s;

        assert(path);

        /* We refuse to clean the root file system with this
         * call. This is extra paranoia to never cause a really
         * seriously broken system. */
        if (path_equal(path, "/")) {
                log_error("Attempted to remove entire root file system, and we can't allow that.");
                return -EPERM;
        }

        if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) {
                /* Try to remove as subvolume first */
                r = btrfs_subvol_remove(path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
                if (r >= 0)
                        return r;

                if (r != -ENOTTY && r != -EINVAL && r != -ENOTDIR)
                        return r;

                /* Not btrfs or not a subvolume */
        }

        fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
        if (fd < 0) {

                if (errno != ENOTDIR && errno != ELOOP)
                        return -errno;

                if (!(flags & REMOVE_PHYSICAL)) {
                        if (statfs(path, &s) < 0)
                                return -errno;

                        if (is_physical_fs(&s)) {
                                log_error("Attempted to remove disk file system, and we can't allow that.");
                                return -EPERM;
                        }
                }

                if ((flags & REMOVE_ROOT) && !(flags & REMOVE_ONLY_DIRECTORIES))
                        if (unlink(path) < 0 && errno != ENOENT)
                                return -errno;

                return 0;
        }

        r = rm_rf_children(fd, flags, NULL);

        if (flags & REMOVE_ROOT) {
                if (rmdir(path) < 0) {
                        if (r == 0 && errno != ENOENT)
                                r = -errno;
                }
        }

        return r;
}

static int automount_verify(Automount *a) {
        bool b;
        char *e;
        assert(a);

        if (UNIT(a)->load_state != UNIT_LOADED)
                return 0;

        if (path_equal(a->where, "/")) {
                log_error_unit(UNIT(a)->id, "Cannot have an automount unit for the root directory. Refusing.");
                return -EINVAL;
        }

        e = unit_name_from_path(a->where, ".automount");
        if (!e)
                return -ENOMEM;

        b = unit_has_name(UNIT(a), e);
        free(e);

        if (!b) {
                log_error_unit(UNIT(a)->id, "%s's Where setting doesn't match unit name. Refusing.", UNIT(a)->id);
                return -EINVAL;
        }

        return 0;
}

static int device_update_unit(Manager *m, struct udev_device *dev, const char *path, bool main) {
        const char *sysfs, *model;
        Unit *u = NULL;
        int r;
        bool delete;

        assert(m);

        if (!(sysfs = udev_device_get_syspath(dev)))
                return -ENOMEM;

        if ((r = device_find_escape_name(m, path, &u)) < 0)
                return r;

        if (u && DEVICE(u)->sysfs && !path_equal(DEVICE(u)->sysfs, sysfs))
                return -EEXIST;

        if (!u) {
                delete = true;

                u = unit_new(m, sizeof(Device));
                if (!u)
                        return -ENOMEM;

                r = device_add_escaped_name(u, path);
                if (r < 0)
                        goto fail;

                unit_add_to_load_queue(u);
        } else

static void drop_duplicates(MountEntry *m, unsigned *n) {
        MountEntry *f, *t, *previous;

        assert(m);
        assert(n);

        /* Drops duplicate entries. Expects that the array is properly ordered already. */

        for (f = m, t = m, previous = NULL; f < m + *n; f++) {

                /* The first one wins (which is the one with the more restrictive mode), see mount_path_compare()
                 * above. */
                if (previous && path_equal(mount_entry_path(f), mount_entry_path(previous))) {
                        log_debug("%s is duplicate.", mount_entry_path(f));
                        previous->read_only = previous->read_only || mount_entry_read_only(f); /* Propagate the read-only flag to the remaining entry */
                        mount_entry_done(f);
                        continue;
                }

                *t = *f;
                previous = t;
                t++;
        }

        *n = t - m;
}

static int automount_verify(Automount *a) {
        _cleanup_free_ char *e = NULL;
        int r;

        assert(a);

        if (UNIT(a)->load_state != UNIT_LOADED)
                return 0;

        if (path_equal(a->where, "/")) {
                log_unit_error(UNIT(a), "Cannot have an automount unit for the root directory. Refusing.");
                return -EINVAL;
        }

        r = unit_name_from_path(a->where, ".automount", &e);
        if (r < 0)
                return log_unit_error(UNIT(a), "Failed to generate unit name from path: %m");

        if (!unit_has_name(UNIT(a), e)) {
                log_unit_error(UNIT(a), "Where= setting doesn't match unit name. Refusing.");
                return -EINVAL;
        }

        return 0;
}

        STRV_FOREACH_PAIR(link, p, links) {
                _cleanup_free_ char *target = NULL;
                char *f = strappenda(original_dir, *p);
                char *l = strappenda(copy_dir, *link);

                assert_se(readlink_and_canonicalize(l, &target) == 0);
                assert_se(path_equal(f, target));
        }

        STRV_FOREACH_PAIR(link, p, links) {
                _cleanup_free_ char *target, *f, *l;

                assert_se(f = strjoin(original_dir, *p));
                assert_se(l = strjoin(copy_dir, *link));

                assert_se(chase_symlinks(l, NULL, 0, &target) == 1);
                assert_se(path_equal(f, target));
        }

bool mount_point_ignore(const char *path) {
        const char *i;

        NULSTR_FOREACH(i, ignore_paths)
                if (path_equal(path, i))
                        return true;

        return false;
}

        STRV_FOREACH_PAIR(link, p, links) {
                _cleanup_free_ char *target = NULL, *f, *l;

                assert_se((f = strjoin(original_dir, *p)));
                assert_se((l = strjoin(copy_dir, *link)));

                assert_se(readlink_and_canonicalize(l, NULL, &target) == 0);
                assert_se(path_equal(f, target));
        }

/*
 * Whenever we do any sort of path lookup, we must make sure we are in
 * the namespace of our southbound fs. This is a simple check that our
 * task struct has the right context.
 */
int in_southbound_context(struct task_struct *tsk)
{
	int err;
	mutex_lock(&ftfs_southbound_lock);
	task_lock(tsk);
	err = path_equal(&tsk->fs->root, &ftfs_fs->root);
	task_unlock(tsk);
	mutex_unlock(&ftfs_southbound_lock);
	return err;
}

Archive* FileSystem::getArchive (const std::string& archiveName)
{
	for (ArchiveEntryList::iterator i = g_archives.begin(); i != g_archives.end(); ++i) {
		if (i->is_pakfile) {
			if (path_equal(i->name, archiveName)) {
				return i->archive;
			}
		}
	}
	return 0;
}

int device_path_parse_major_minor(const char *path, mode_t *ret_mode, dev_t *ret_devno) {
        mode_t mode;
        dev_t devno;
        int r;

        /* Tries to extract the major/minor directly from the device path if we can. Handles /dev/block/ and /dev/char/
         * paths, as well out synthetic inaccessible device nodes. Never goes to disk. Returns -ENODEV if the device
         * path cannot be parsed like this.  */

        if (path_equal(path, "/run/systemd/inaccessible/chr")) {
                mode = S_IFCHR;
                devno = makedev(0, 0);
        } else if (path_equal(path, "/run/systemd/inaccessible/blk")) {
                mode = S_IFBLK;
                devno = makedev(0, 0);
        } else {
                const char *w;

                w = path_startswith(path, "/dev/block/");
                if (w)
                        mode = S_IFBLK;
                else {
                        w = path_startswith(path, "/dev/char/");
                        if (!w)
                                return -ENODEV;

                        mode = S_IFCHR;
                }

                r = parse_dev(w, &devno);
                if (r < 0)
                        return r;
        }

        if (ret_mode)
                *ret_mode = mode;
        if (ret_devno)
                *ret_devno = devno;

        return 0;
}

  Archive* getArchive(const char* archiveName, bool pakonly)
  {
    for(archives_t::iterator i = g_archives.begin(); i != g_archives.end(); ++i)
    {
      if(pakonly && !(*i).is_pakfile)
        continue;

      if(path_equal((*i).name.c_str(), archiveName))
        return (*i).archive;
    }
    return 0;
  }

bool mount_point_is_api(const char *path) {
        unsigned i;

        /* Checks if this mount point is considered "API", and hence
         * should be ignored */

        for (i = 0; i < ELEMENTSOF(mount_table); i ++)
                if (path_equal(path, mount_table[i].where))
                        return true;

        return path_startswith(path, "/sys/fs/cgroup/");
}

static int equivalent(const char *a, const char *b) {
        _cleanup_free_ char *x = NULL, *y = NULL;

        x = canonicalize_file_name(a);
        if (!x)
                return -errno;

        y = canonicalize_file_name(b);
        if (!y)
                return -errno;

        return path_equal(x, y);
}

static int equivalent(const char *a, const char *b) {
        _cleanup_free_ char *x = NULL, *y = NULL;
        int r;

        r = chase_symlinks(a, NULL, 0, &x);
        if (r < 0)
                return r;

        r = chase_symlinks(b, NULL, 0, &y);
        if (r < 0)
                return r;

        return path_equal(x, y);
}

static void test_u_n_f_p_one(const char *path, const char *suffix, const char *expected, int ret) {
        _cleanup_free_ char *t = NULL;

        assert_se(unit_name_from_path(path, suffix, &t) == ret);
        puts(strna(t));
        assert_se(streq_ptr(t, expected));

        if (t) {
                _cleanup_free_ char *k = NULL;
                assert_se(unit_name_to_path(t, &k) == 0);
                puts(strna(k));
                assert_se(path_equal(k, isempty(path) ? "/" : path));
        }
}

static void test_mnt_id(void) {
        _cleanup_fclose_ FILE *f = NULL;
        Hashmap *h;
        Iterator i;
        char *p;
        void *k;
        int r;

        log_info("/* %s */", __func__);

        assert_se(f = fopen("/proc/self/mountinfo", "re"));
        assert_se(h = hashmap_new(&trivial_hash_ops));

        for (;;) {
                _cleanup_free_ char *line = NULL, *path = NULL;
                int mnt_id;

                r = read_line(f, LONG_LINE_MAX, &line);
                if (r == 0)
                        break;
                assert_se(r > 0);

                assert_se(sscanf(line, "%i %*s %*s %*s %ms", &mnt_id, &path) == 2);

                log_debug("mountinfo: %s → %i", path, mnt_id);

                assert_se(hashmap_put(h, INT_TO_PTR(mnt_id), path) >= 0);
                path = NULL;
        }

        HASHMAP_FOREACH_KEY(p, k, h, i) {
                int mnt_id = PTR_TO_INT(k), mnt_id2;

                r = path_get_mnt_id(p, &mnt_id2);
                if (r < 0) {
                        log_debug_errno(r, "Failed to get the mnt id of %s: %m\n", p);
                        continue;
                }

                log_debug("mnt ids of %s are %i, %i\n", p, mnt_id, mnt_id2);

                if (mnt_id == mnt_id2)
                        continue;

                /* The ids don't match? If so, then there are two mounts on the same path, let's check if
                 * that's really the case */
                char *t = hashmap_get(h, INT_TO_PTR(mnt_id2));
                log_debug("the other path for mnt id %i is %s\n", mnt_id2, t);
                assert_se(path_equal(p, t));
        }