systemd/udev/udev-builtin-kmod.c

/*
 * load kernel modules
 *
 * Copyright (C) 2011 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 <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/wait.h>

#include "udev.h"

static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool test)
{
	struct udev *udev = udev_device_get_udev(dev);
	pid_t pid;
	char *m[5];

	if (argc < 3) {
		err(udev, "missing command + argument\n");
		return EXIT_FAILURE;
	}

	err(udev, "'%s' the module '%s' (%i)\n", argv[1], argv[2], argc);

	m[0] = "/sbin/modprobe";
	m[1] = "-bv";
	m[1] = argv[2];
	m[2] = argv[3];
	m[3] = NULL;

	pid = fork();
	switch(pid) {
	case 0:
		execv(m[0], m);
		_exit(1);
	case -1:
		return EXIT_FAILURE;
	default:
		waitpid(pid, NULL, 0);
	}

	return EXIT_SUCCESS;
}

static int builtin_kmod_load(struct udev *udev)
{
	info(udev, "load module index\n");
	return 0;
}

static int builtin_kmod_unload(struct udev *udev)
{
	info(udev, "unload module index\n");
	return 0;
}

const struct udev_builtin udev_builtin_kmod = {
	.name = "kmod",
	.cmd = builtin_kmod,
	.load = builtin_kmod_load,
	.unload = builtin_kmod_unload,
	.help = "kernel module loader",
	.run_once = false,
};