/***
  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 <unistd.h>

#include "alloc-util.h"
#include "fileio.h"
#include "fd-util.h"
#include "fs-util.h"
#include "macro.h"
#include "mkdir.h"
#include "rm-rf.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"

static void test_unlink_noerrno(void) {
        char name[] = "/tmp/test-close_nointr.XXXXXX";
        int fd;

        fd = mkostemp_safe(name, O_RDWR|O_CLOEXEC);
        assert_se(fd >= 0);
        assert_se(close_nointr(fd) >= 0);

        {
                PROTECT_ERRNO;
                errno = -42;
                assert_se(unlink_noerrno(name) >= 0);
                assert_se(errno == -42);
                assert_se(unlink_noerrno(name) < 0);
                assert_se(errno == -42);
        }
}

static void test_readlink_and_make_absolute(void) {
        char tempdir[] = "/tmp/test-readlink_and_make_absolute";
        char name[] = "/tmp/test-readlink_and_make_absolute/original";
        char name2[] = "test-readlink_and_make_absolute/original";
        char name_alias[] = "/tmp/test-readlink_and_make_absolute-alias";
        char *r = NULL;

        assert_se(mkdir_safe(tempdir, 0755, getuid(), getgid()) >= 0);
        assert_se(touch(name) >= 0);

        assert_se(symlink(name, name_alias) >= 0);
        assert_se(readlink_and_make_absolute(name_alias, &r) >= 0);
        assert_se(streq(r, name));
        free(r);
        assert_se(unlink(name_alias) >= 0);

        assert_se(chdir(tempdir) >= 0);
        assert_se(symlink(name2, name_alias) >= 0);
        assert_se(readlink_and_make_absolute(name_alias, &r) >= 0);
        assert_se(streq(r, name));
        free(r);
        assert_se(unlink(name_alias) >= 0);

        assert_se(rm_rf(tempdir, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
}

static void test_get_files_in_directory(void) {
        _cleanup_strv_free_ char **l = NULL, **t = NULL;

        assert_se(get_files_in_directory("/tmp", &l) >= 0);
        assert_se(get_files_in_directory(".", &t) >= 0);
        assert_se(get_files_in_directory(".", NULL) >= 0);
}

static void test_var_tmp(void) {
        char *tmp_dir = NULL;
        char *tmpdir_backup = NULL;
        const char *default_var_tmp = NULL;
        const char *var_name;
        bool do_overwrite = true;

        default_var_tmp = "/var/tmp";
        var_name = "TMPDIR";

        if (getenv(var_name) != NULL) {
                tmpdir_backup = strdup(getenv(var_name));
                assert_se(tmpdir_backup != NULL);
        }

        unsetenv(var_name);

        var_tmp(&tmp_dir);
        assert_se(!strcmp(tmp_dir, default_var_tmp));

        free(tmp_dir);

        setenv(var_name, "/tmp", do_overwrite);
        assert_se(!strcmp(getenv(var_name), "/tmp"));

        var_tmp(&tmp_dir);
        assert_se(!strcmp(tmp_dir, "/tmp"));

        free(tmp_dir);

        setenv(var_name, "/88_does_not_exist_88", do_overwrite);
        assert_se(!strcmp(getenv(var_name), "/88_does_not_exist_88"));

        var_tmp(&tmp_dir);
        assert_se(!strcmp(tmp_dir, default_var_tmp));

        free(tmp_dir);

        if (tmpdir_backup != NULL)  {
                setenv(var_name, tmpdir_backup, do_overwrite);
                assert_se(!strcmp(getenv(var_name), tmpdir_backup));
                free(tmpdir_backup);
        }
}

int main(int argc, char *argv[]) {
        test_unlink_noerrno();
        test_readlink_and_make_absolute();
        test_get_files_in_directory();
        test_var_tmp();

        return 0;
}
