systemd/udev/udevadm-test-builtin.c

/*
 * 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 <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <syslog.h>
#include <getopt.h>
#include <signal.h>
#include <time.h>
#include <sys/inotify.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include <sys/types.h>

#include "udev.h"

static void help(struct udev *udev)
{
	fprintf(stderr, "\n");
	fprintf(stderr, "Usage: udevadm builtin [--help] <command> <syspath>\n");
	udev_builtin_list(udev);
	fprintf(stderr, "\n");
}

static int adm_builtin(struct udev *udev, int argc, char *argv[])
{
	static const struct option options[] = {
		{ "help", no_argument, NULL, 'h' },
		{}
	};
	char *command = NULL;
	char *syspath = NULL;
	char filename[UTIL_PATH_SIZE];
	struct udev_device *dev = NULL;
	enum udev_builtin_cmd cmd;
	int rc = EXIT_SUCCESS;

	dbg(udev, "version %s\n", VERSION);

	for (;;) {
		int option;

		option = getopt_long(argc, argv, "h", options, NULL);
		if (option == -1)
			break;

		switch (option) {
		case 'h':
			help(udev);
			goto out;
		}
	}

	command = argv[optind++];
	if (command == NULL) {
		fprintf(stderr, "command missing\n");
		help(udev);
		rc = 2;
		goto out;
	}

	syspath = argv[optind++];
	if (syspath == NULL) {
		fprintf(stderr, "syspath missing\n\n");
		rc = 3;
		goto out;
	}

	udev_builtin_init(udev);

	cmd = udev_builtin_lookup(command);
	if (cmd >= UDEV_BUILTIN_MAX) {
		fprintf(stderr, "unknown command '%s'\n", command);
		help(udev);
		rc = 5;
		goto out;
	}

	/* add /sys if needed */
	if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0)
		util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev), syspath, NULL);
	else
		util_strscpy(filename, sizeof(filename), syspath);
	util_remove_trailing_chars(filename, '/');

	dev = udev_device_new_from_syspath(udev, filename);
	if (dev == NULL) {
		fprintf(stderr, "unable to open device '%s'\n\n", filename);
		rc = 4;
		goto out;
	}

	if (udev_builtin_run(dev, cmd, command, true) < 0) {
		fprintf(stderr, "error executing '%s'\n\n", command);
		rc = 6;
	}
out:
	udev_device_unref(dev);
	udev_builtin_exit(udev);
	return rc;
}

const struct udevadm_cmd udevadm_test_builtin = {
	.name = "test-builtin",
	.cmd = adm_builtin,
	.help = "test a built-in command",
	.debug = true,
};