/*
 * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <syslog.h>
#include <grp.h>
#include <sys/signalfd.h>

#include "udev.h"

void udev_main_log(struct udev *udev, int priority,
                   const char *file, int line, const char *fn,
                   const char *format, va_list args) {}

int main(int argc, char *argv[])
{
        struct udev *udev;
        struct udev_event *event = NULL;
        struct udev_device *dev = NULL;
        struct udev_rules *rules = NULL;
        char syspath[UTIL_PATH_SIZE];
        const char *devpath;
        const char *action;
        sigset_t mask, sigmask_orig;
        int err = -EINVAL;

        udev = udev_new();
        if (udev == NULL)
                exit(EXIT_FAILURE);
        log_debug("version %s\n", VERSION);
        udev_selinux_init(udev);

        sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);

        action = argv[1];
        if (action == NULL) {
                log_error("action missing\n");
                goto out;
        }

        devpath = argv[2];
        if (devpath == NULL) {
                log_error("devpath missing\n");
                goto out;
        }

        rules = udev_rules_new(udev, 1);

        util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
        dev = udev_device_new_from_syspath(udev, syspath);
        if (dev == NULL) {
                log_debug("unknown device '%s'\n", devpath);
                goto out;
        }

        udev_device_set_action(dev, action);
        event = udev_event_new(dev);

        sigfillset(&mask);
        sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
        event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
        if (event->fd_signal < 0) {
                fprintf(stderr, "error creating signalfd\n");
                goto out;
        }

        /* do what devtmpfs usually provides us */
        if (udev_device_get_devnode(dev) != NULL) {
                mode_t mode;

                if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
                        mode |= S_IFBLK;
                else
                        mode |= S_IFCHR;

                if (strcmp(action, "remove") != 0) {
                        util_create_path(udev, udev_device_get_devnode(dev));
                        mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev));
                } else {
                        unlink(udev_device_get_devnode(dev));
                        util_delete_path(udev, udev_device_get_devnode(dev));
                }
        }

        err = udev_event_execute_rules(event, rules, &sigmask_orig);
        if (err == 0)
                udev_event_execute_run(event, NULL);
out:
        if (event != NULL && event->fd_signal >= 0)
                close(event->fd_signal);
        udev_event_unref(event);
        udev_device_unref(dev);
        udev_rules_unref(rules);
        udev_selinux_exit(udev);
        udev_unref(udev);
        if (err != 0)
                return EXIT_FAILURE;
        return EXIT_SUCCESS;
}