mirror of
https://github.com/systemd/systemd-stable.git
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193 lines
4.7 KiB
C
193 lines
4.7 KiB
C
/*
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* test-libudev
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*
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* Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/select.h>
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#include "libudev.h"
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static void log_fn(struct udev *udev,
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int priority, const char *file, int line, const char *fn,
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const char *format, va_list args)
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{
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printf("test-libudev: %s %s:%d ", fn, file, line);
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vprintf(format, args);
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}
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static int print_devlinks_cb(struct udev_device *udev_device, const char *value, void *data)
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{
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printf("link: '%s'\n", value);
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return 0;
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}
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static int print_properties_cb(struct udev_device *udev_device, const char *key, const char *value, void *data)
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{
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printf("property: '%s=%s'\n", key, value);
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return 0;
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}
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static void print_device(struct udev_device *device)
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{
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const char *str;
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int count;
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printf("*** device: %p ***\n", device);
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str = udev_device_get_devpath(device);
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printf("devpath: '%s'\n", str);
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str = udev_device_get_subsystem(device);
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printf("subsystem: '%s'\n", str);
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str = udev_device_get_driver(device);
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printf("driver: '%s'\n", str);
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str = udev_device_get_syspath(device);
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printf("syspath: '%s'\n", str);
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str = udev_device_get_devname(device);
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printf("devname: '%s'\n", str);
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count = udev_device_get_devlinks(device, print_devlinks_cb, NULL);
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printf("found %i links\n", count);
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count = udev_device_get_properties(device, print_properties_cb, NULL);
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printf("found %i properties\n", count);
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printf("\n");
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}
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static int test_device(struct udev *udev, const char *devpath)
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{
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struct udev_device *device;
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printf("looking at device: %s\n", devpath);
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device = udev_device_new_from_devpath(udev, devpath);
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if (device == NULL) {
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printf("no device\n");
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return -1;
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}
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print_device(device);
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udev_device_unref(device);
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return 0;
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}
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static int devices_enum_cb(struct udev *udev,
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const char *devpath, const char *subsystem, const char *name,
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void *data)
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{
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printf("device: '%s' (%s) '%s'\n", devpath, subsystem, name);
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return 0;
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}
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static int test_enumerate(struct udev *udev, const char *subsystem)
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{
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int count;
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count = udev_enumerate_devices(udev, subsystem, devices_enum_cb, NULL);
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printf("found %i devices\n\n", count);
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return count;
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}
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static int test_monitor(struct udev *udev, const char *socket_path)
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{
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struct udev_monitor *udev_monitor;
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fd_set readfds;
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int fd;
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udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
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if (udev_monitor == NULL) {
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printf("no socket\n");
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return -1;
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}
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if (udev_monitor_enable_receiving(udev_monitor) < 0) {
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printf("bind failed\n");
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return -1;
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}
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fd = udev_monitor_get_fd(udev_monitor);
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FD_ZERO(&readfds);
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while (1) {
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struct udev_device *device;
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int fdcount;
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FD_SET(STDIN_FILENO, &readfds);
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FD_SET(fd, &readfds);
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printf("waiting for events on %s, press ENTER to exit\n", socket_path);
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fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
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printf("select fd count: %i\n", fdcount);
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if (FD_ISSET(fd, &readfds)) {
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device = udev_monitor_receive_device(udev_monitor);
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if (device == NULL) {
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printf("no device from socket\n");
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continue;
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}
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print_device(device);
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udev_device_unref(device);
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}
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if (FD_ISSET(STDIN_FILENO, &readfds)) {
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printf("exiting loop\n");
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break;
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}
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}
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udev_monitor_unref(udev_monitor);
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return 0;
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}
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int main(int argc, char *argv[], char *envp[])
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{
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struct udev *udev;
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const char *devpath = "/devices/virtual/mem/null";
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const char *subsystem = NULL;
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const char *socket = "@/org/kernel/udev/monitor";
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const char *str;
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if (argv[1] != NULL) {
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devpath = argv[1];
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if (argv[2] != NULL)
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subsystem = argv[2];
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if (argv[3] != NULL)
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socket = argv[3];
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}
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udev = udev_new();
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printf("context: %p\n", udev);
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if (udev == NULL) {
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printf("no context\n");
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return 1;
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}
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udev_set_log_fn(udev, log_fn);
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printf("set log: %p\n", log_fn);
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str = udev_get_sys_path(udev);
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printf("sys_path: '%s'\n", str);
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str = udev_get_dev_path(udev);
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printf("dev_path: '%s'\n", str);
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test_device(udev, devpath);
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test_enumerate(udev, subsystem);
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test_monitor(udev, socket);
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udev_unref(udev);
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return 0;
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}
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