Systemd/src/test/test-xattr-util.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  This file is part of systemd.

  Copyright 2010 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 <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/xattr.h>
#include <unistd.h>

#include "alloc-util.h"
#include "fd-util.h"
#include "fs-util.h"
#include "macro.h"
#include "string-util.h"
#include "xattr-util.h"

static void test_fgetxattrat_fake(void) {
        char t[] = "/var/tmp/xattrtestXXXXXX";
        _cleanup_close_ int fd = -1;
        const char *x;
        char v[3] = {};
        int r;

        assert_se(mkdtemp(t));
        x = strjoina(t, "/test");
        assert_se(touch(x) >= 0);

        r = setxattr(x, "user.foo", "bar", 3, 0);
        if (r < 0 && errno == EOPNOTSUPP) /* no xattrs supported on /var/tmp... */
                goto cleanup;
        assert_se(r >= 0);

        fd = open(t, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY);
        assert_se(fd >= 0);

        assert_se(fgetxattrat_fake(fd, "test", "user.foo", v, 3, 0) >= 0);
        assert_se(memcmp(v, "bar", 3) == 0);

        safe_close(fd);
        fd = open("/", O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY);
        assert_se(fd >= 0);
        assert_se(fgetxattrat_fake(fd, "usr", "user.idontexist", v, 3, 0) == -ENODATA);

cleanup:
        assert_se(unlink(x) >= 0);
        assert_se(rmdir(t) >= 0);
}

int main(void) {
        test_fgetxattrat_fake();

        return 0;
}