/***
  This file is part of systemd.

  Copyright 2012 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 "sd-bus.h"

#include "bus-util.h"
#include "fd-util.h"
#include "macro.h"
#include "util.h"

static int inhibit(sd_bus *bus, const char *what) {
        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        const char *who = "Test Tool", *reason = "Just because!", *mode = "block";
        int fd;
        int r;

        r = sd_bus_call_method(bus,
                        "org.freedesktop.login1",
                        "/org/freedesktop/login1",
                        "org.freedesktop.login1.Manager",
                        "Inhibit",
                        &error,
                        &reply,
                        "ssss", what, who, reason, mode);
        assert_se(r >= 0);

        r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd);
        assert_se(r >= 0);
        assert_se(fd >= 0);

        return dup(fd);
}

static void print_inhibitors(sd_bus *bus) {
        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        const char *what, *who, *why, *mode;
        uint32_t uid, pid;
        unsigned n = 0;
        int r;

        r = sd_bus_call_method(bus,
                        "org.freedesktop.login1",
                        "/org/freedesktop/login1",
                        "org.freedesktop.login1.Manager",
                        "ListInhibitors",
                        &error,
                        &reply,
                        "");
        assert_se(r >= 0);

        r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
        assert_se(r >= 0);

        while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
                printf("what=<%s> who=<%s> why=<%s> mode=<%s> uid=<%"PRIu32"> pid=<%"PRIu32">\n",
                       what, who, why, mode, uid, pid);

                n++;
        }
        assert_se(r >= 0);

        printf("%u inhibitors\n", n);
}

int main(int argc, char*argv[]) {
        _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
        int fd1, fd2;
        int r;

        r = sd_bus_open_system(&bus);
        assert_se(r >= 0);

        print_inhibitors(bus);

        fd1 = inhibit(bus, "sleep");
        assert_se(fd1 >= 0);
        print_inhibitors(bus);

        fd2 = inhibit(bus, "idle:shutdown");
        assert_se(fd2 >= 0);
        print_inhibitors(bus);

        safe_close(fd1);
        sleep(1);
        print_inhibitors(bus);

        safe_close(fd2);
        sleep(1);
        print_inhibitors(bus);

        return 0;
}