mirror of
https://github.com/systemd/systemd.git
synced 2024-12-25 01:34:28 +03:00
241 lines
6.6 KiB
C
241 lines
6.6 KiB
C
/*
|
|
* 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 <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <getopt.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <sys/select.h>
|
|
#include <linux/types.h>
|
|
#include <linux/netlink.h>
|
|
|
|
#include "udev.h"
|
|
|
|
static int udev_exit;
|
|
|
|
static void asmlinkage sig_handler(int signum)
|
|
{
|
|
if (signum == SIGINT || signum == SIGTERM)
|
|
udev_exit = 1;
|
|
}
|
|
|
|
static void print_device(struct udev_device *device, const char *source, int env)
|
|
{
|
|
struct timeval tv;
|
|
struct timezone tz;
|
|
|
|
gettimeofday(&tv, &tz);
|
|
printf("%-6s[%llu.%06u] %-8s %s (%s)\n",
|
|
source,
|
|
(unsigned long long) tv.tv_sec, (unsigned int) tv.tv_usec,
|
|
udev_device_get_action(device),
|
|
udev_device_get_devpath(device),
|
|
udev_device_get_subsystem(device));
|
|
if (env) {
|
|
struct udev_list_entry *list_entry;
|
|
|
|
udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device))
|
|
printf("%s=%s\n",
|
|
udev_list_entry_get_name(list_entry),
|
|
udev_list_entry_get_value(list_entry));
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
int udevadm_monitor(struct udev *udev, int argc, char *argv[])
|
|
{
|
|
struct sigaction act;
|
|
int option;
|
|
int env = 0;
|
|
int print_kernel = 0;
|
|
int print_udev = 0;
|
|
struct udev_list_node subsystem_match_list;
|
|
struct udev_monitor *udev_monitor = NULL;
|
|
struct udev_monitor *kernel_monitor = NULL;
|
|
fd_set readfds;
|
|
int rc = 0;
|
|
|
|
static const struct option options[] = {
|
|
{ "environment", no_argument, NULL, 'e' },
|
|
{ "kernel", no_argument, NULL, 'k' },
|
|
{ "udev", no_argument, NULL, 'u' },
|
|
{ "subsystem-match", required_argument, NULL, 's' },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{}
|
|
};
|
|
|
|
udev_list_init(&subsystem_match_list);
|
|
while (1) {
|
|
option = getopt_long(argc, argv, "ekus:h", options, NULL);
|
|
if (option == -1)
|
|
break;
|
|
|
|
switch (option) {
|
|
case 'e':
|
|
env = 1;
|
|
break;
|
|
case 'k':
|
|
print_kernel = 1;
|
|
break;
|
|
case 'u':
|
|
print_udev = 1;
|
|
break;
|
|
case 's':
|
|
{
|
|
char subsys[UTIL_NAME_SIZE];
|
|
char *devtype;
|
|
|
|
util_strlcpy(subsys, optarg, sizeof(subsys));
|
|
devtype = strchr(subsys, ':');
|
|
if (devtype != NULL) {
|
|
devtype[0] = '\0';
|
|
devtype++;
|
|
}
|
|
printf("add '%s' '%s')\n", subsys, devtype);
|
|
udev_list_entry_add(udev, &subsystem_match_list, subsys, devtype, 0, 0);
|
|
break;
|
|
}
|
|
case 'h':
|
|
printf("Usage: udevadm monitor [--environment] [--kernel] [--udev] [--help]\n"
|
|
" --env print the whole event environment\n"
|
|
" --kernel print kernel uevents\n"
|
|
" --udev print udev events\n"
|
|
" --subsystem-match=<subsystem> filter events\n"
|
|
" --help\n\n");
|
|
default:
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (!print_kernel && !print_udev) {
|
|
print_kernel = 1;
|
|
print_udev =1;
|
|
}
|
|
|
|
/* set signal handlers */
|
|
memset(&act, 0x00, sizeof(struct sigaction));
|
|
act.sa_handler = (void (*)(int)) sig_handler;
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = SA_RESTART;
|
|
sigaction(SIGINT, &act, NULL);
|
|
sigaction(SIGTERM, &act, NULL);
|
|
|
|
printf("monitor will print the received events for:\n");
|
|
if (print_udev) {
|
|
struct udev_list_entry *entry;
|
|
|
|
udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
|
|
if (udev_monitor == NULL) {
|
|
fprintf(stderr, "error: unable to create netlink socket\n");
|
|
rc = 1;
|
|
goto out;
|
|
}
|
|
|
|
udev_list_entry_foreach(entry, udev_list_get_entry(&subsystem_match_list)) {
|
|
const char *subsys = udev_list_entry_get_name(entry);
|
|
const char *devtype = udev_list_entry_get_value(entry);
|
|
|
|
if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, subsys, devtype) < 0)
|
|
fprintf(stderr, "error: unable to apply subsystem filter '%s'\n", subsys);
|
|
}
|
|
|
|
if (udev_monitor_enable_receiving(udev_monitor) < 0) {
|
|
fprintf(stderr, "error: unable to subscribe to udev events\n");
|
|
rc = 2;
|
|
goto out;
|
|
}
|
|
printf("UDEV - the event which udev sends out after rule processing\n");
|
|
}
|
|
if (print_kernel) {
|
|
struct udev_list_entry *entry;
|
|
|
|
kernel_monitor = udev_monitor_new_from_netlink(udev, "kernel");
|
|
if (kernel_monitor == NULL) {
|
|
fprintf(stderr, "error: unable to create netlink socket\n");
|
|
rc = 3;
|
|
goto out;
|
|
}
|
|
|
|
udev_list_entry_foreach(entry, udev_list_get_entry(&subsystem_match_list)) {
|
|
const char *subsys = udev_list_entry_get_name(entry);
|
|
|
|
if (udev_monitor_filter_add_match_subsystem_devtype(kernel_monitor, subsys, NULL) < 0)
|
|
fprintf(stderr, "error: unable to apply subsystem filter '%s'\n", subsys);
|
|
}
|
|
|
|
if (udev_monitor_enable_receiving(kernel_monitor) < 0) {
|
|
fprintf(stderr, "error: unable to subscribe to kernel events\n");
|
|
rc = 4;
|
|
goto out;
|
|
}
|
|
printf("KERNEL - the kernel uevent\n");
|
|
}
|
|
printf("\n");
|
|
|
|
while (!udev_exit) {
|
|
int fdcount;
|
|
|
|
FD_ZERO(&readfds);
|
|
if (kernel_monitor != NULL)
|
|
FD_SET(udev_monitor_get_fd(kernel_monitor), &readfds);
|
|
if (udev_monitor != NULL)
|
|
FD_SET(udev_monitor_get_fd(udev_monitor), &readfds);
|
|
|
|
fdcount = select(UDEV_MAX(udev_monitor_get_fd(kernel_monitor), udev_monitor_get_fd(udev_monitor))+1,
|
|
&readfds, NULL, NULL, NULL);
|
|
if (fdcount < 0) {
|
|
if (errno != EINTR)
|
|
fprintf(stderr, "error receiving uevent message: %m\n");
|
|
continue;
|
|
}
|
|
|
|
if ((kernel_monitor != NULL) && FD_ISSET(udev_monitor_get_fd(kernel_monitor), &readfds)) {
|
|
struct udev_device *device;
|
|
|
|
device = udev_monitor_receive_device(kernel_monitor);
|
|
if (device == NULL)
|
|
continue;
|
|
print_device(device, "KERNEL", env);
|
|
udev_device_unref(device);
|
|
}
|
|
|
|
if ((udev_monitor != NULL) && FD_ISSET(udev_monitor_get_fd(udev_monitor), &readfds)) {
|
|
struct udev_device *device;
|
|
|
|
device = udev_monitor_receive_device(udev_monitor);
|
|
if (device == NULL)
|
|
continue;
|
|
print_device(device, "UDEV", env);
|
|
udev_device_unref(device);
|
|
}
|
|
}
|
|
|
|
out:
|
|
udev_monitor_unref(udev_monitor);
|
|
udev_monitor_unref(kernel_monitor);
|
|
udev_list_cleanup_entries(udev, &subsystem_match_list);
|
|
return rc;
|
|
}
|