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/* SPDX-License-Identifier: LGPL-2.1+ */

#include "path-lookup.h"
#include "set.h"
#include "special.h"
#include "strv.h"
#include "tests.h"
#include "unit-file.h"

static void test_unit_validate_alias_symlink_and_warn(void) {
        log_info("/* %s */", __func__);

        assert_se(unit_validate_alias_symlink_and_warn("/path/a.service", "/other/b.service") == 0);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a.service", "/other/b.socket") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a.service", "/other/b.foobar") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@.service", "/other/b@.service") == 0);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@.service", "/other/b@.socket") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@XXX.service", "/other/b@YYY.service") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@XXX.service", "/other/b@YYY.socket") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@.service", "/other/b@YYY.service") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@XXX.service", "/other/b@XXX.service") == 0);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@XXX.service", "/other/b@.service") == 0);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@.service", "/other/b.service") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a.service", "/other/b@.service") == -EXDEV);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a@.slice", "/other/b.slice") == -EINVAL);
        assert_se(unit_validate_alias_symlink_and_warn("/path/a.slice", "/other/b.slice") == -EINVAL);
}

static void test_unit_file_build_name_map(char **ids) {
        _cleanup_(lookup_paths_free) LookupPaths lp = {};
        _cleanup_hashmap_free_ Hashmap *unit_ids = NULL;
        _cleanup_hashmap_free_ Hashmap *unit_names = NULL;
        Iterator i;
        const char *k, *dst;
        char **v;
        usec_t mtime = 0;
        int r;

        assert_se(lookup_paths_init(&lp, UNIT_FILE_SYSTEM, 0, NULL) >= 0);

        assert_se(unit_file_build_name_map(&lp, &mtime, &unit_ids, &unit_names, NULL) == 1);

        HASHMAP_FOREACH_KEY(dst, k, unit_ids, i)
                log_info("ids: %s → %s", k, dst);

        HASHMAP_FOREACH_KEY(v, k, unit_names, i) {
                _cleanup_free_ char *j = strv_join(v, ", ");
                log_info("aliases: %s ← %s", k, j);
        }

        char buf[FORMAT_TIMESTAMP_MAX];
        log_debug("Last modification time: %s", format_timestamp(buf, sizeof buf, mtime));

        r = unit_file_build_name_map(&lp, &mtime, &unit_ids, &unit_names, NULL);
        assert_se(IN_SET(r, 0, 1));
        if (r == 0)
                log_debug("Cache rebuild skipped based on mtime.");


        char **id;
        STRV_FOREACH(id, ids) {
                 const char *fragment, *name;
                 Iterator it;
                 _cleanup_set_free_free_ Set *names = NULL;
                 log_info("*** %s ***", *id);
                 r = unit_file_find_fragment(unit_ids,
                                             unit_names,
                                             *id,
                                             &fragment,
                                             &names);
                 assert(r == 0);
                 log_info("fragment: %s", fragment);
                 log_info("names:");
                 SET_FOREACH(name, names, it)
                         log_info("    %s", name);
        }
}

static void test_runlevel_to_target(void) {
        log_info("/* %s */", __func__);

        in_initrd_force(false);
        assert_se(streq_ptr(runlevel_to_target(NULL), NULL));
        assert_se(streq_ptr(runlevel_to_target("unknown-runlevel"), NULL));
        assert_se(streq_ptr(runlevel_to_target("rd.unknown-runlevel"), NULL));
        assert_se(streq_ptr(runlevel_to_target("3"), SPECIAL_MULTI_USER_TARGET));
        assert_se(streq_ptr(runlevel_to_target("rd.rescue"), NULL));

        in_initrd_force(true);
        assert_se(streq_ptr(runlevel_to_target(NULL), NULL));
        assert_se(streq_ptr(runlevel_to_target("unknown-runlevel"), NULL));
        assert_se(streq_ptr(runlevel_to_target("rd.unknown-runlevel"), NULL));
        assert_se(streq_ptr(runlevel_to_target("3"), NULL));
        assert_se(streq_ptr(runlevel_to_target("rd.rescue"), SPECIAL_RESCUE_TARGET));
}

int main(int argc, char **argv) {
        test_setup_logging(LOG_DEBUG);

        test_unit_validate_alias_symlink_and_warn();
        test_unit_file_build_name_map(strv_skip(argv, 1));
        test_runlevel_to_target();

        return 0;
}