+++ /dev/null
-/*
- * Copyright (C) 2004-2010 Kay Sievers <kay@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 <string.h>
-#include <errno.h>
-#include <signal.h>
-#include <getopt.h>
-#include <time.h>
-#include <sys/time.h>
-#include <sys/epoll.h>
-
-#include "udev.h"
-#include "udev-util.h"
-
-static bool udev_exit;
-
-static void sig_handler(int signum) {
- if (signum == SIGINT || signum == SIGTERM)
- udev_exit = true;
-}
-
-static void print_device(struct udev_device *device, const char *source, int prop) {
- struct timespec ts;
-
- clock_gettime(CLOCK_MONOTONIC, &ts);
- printf("%-6s[%"PRI_TIME".%06ld] %-8s %s (%s)\n",
- source,
- ts.tv_sec, ts.tv_nsec/1000,
- udev_device_get_action(device),
- udev_device_get_devpath(device),
- udev_device_get_subsystem(device));
- if (prop) {
- 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");
- }
-}
-
-static void help(void) {
- printf("%s monitor [--property] [--kernel] [--udev] [--help]\n\n"
- "Listen to kernel and udev events.\n\n"
- " -h --help Show this help\n"
- " --version Show package version\n"
- " -p --property Print the event properties\n"
- " -k --kernel Print kernel uevents\n"
- " -u --udev Print udev events\n"
- " -s --subsystem-match=SUBSYSTEM[/DEVTYPE] Filter events by subsystem\n"
- " -t --tag-match=TAG Filter events by tag\n"
- , program_invocation_short_name);
-}
-
-static int adm_monitor(struct udev *udev, int argc, char *argv[]) {
- struct sigaction act = {};
- sigset_t mask;
- bool prop = false;
- bool print_kernel = false;
- bool print_udev = false;
- _cleanup_udev_list_cleanup_ struct udev_list subsystem_match_list;
- _cleanup_udev_list_cleanup_ struct udev_list tag_match_list;
- _cleanup_udev_monitor_unref_ struct udev_monitor *udev_monitor = NULL;
- _cleanup_udev_monitor_unref_ struct udev_monitor *kernel_monitor = NULL;
- _cleanup_close_ int fd_ep = -1;
- int fd_kernel = -1, fd_udev = -1;
- struct epoll_event ep_kernel, ep_udev;
- int c;
-
- static const struct option options[] = {
- { "property", no_argument, NULL, 'p' },
- { "environment", no_argument, NULL, 'e' }, /* alias for -p */
- { "kernel", no_argument, NULL, 'k' },
- { "udev", no_argument, NULL, 'u' },
- { "subsystem-match", required_argument, NULL, 's' },
- { "tag-match", required_argument, NULL, 't' },
- { "help", no_argument, NULL, 'h' },
- {}
- };
-
- udev_list_init(udev, &subsystem_match_list, true);
- udev_list_init(udev, &tag_match_list, true);
-
- while((c = getopt_long(argc, argv, "pekus:t:h", options, NULL)) >= 0)
- switch (c) {
- case 'p':
- case 'e':
- prop = true;
- break;
- case 'k':
- print_kernel = true;
- break;
- case 'u':
- print_udev = true;
- break;
- case 's':
- {
- char subsys[UTIL_NAME_SIZE];
- char *devtype;
-
- strscpy(subsys, sizeof(subsys), optarg);
- devtype = strchr(subsys, '/');
- if (devtype != NULL) {
- devtype[0] = '\0';
- devtype++;
- }
- udev_list_entry_add(&subsystem_match_list, subsys, devtype);
- break;
- }
- case 't':
- udev_list_entry_add(&tag_match_list, optarg, NULL);
- break;
- case 'h':
- help();
- return 0;
- default:
- return 1;
- }
-
- if (!print_kernel && !print_udev) {
- print_kernel = true;
- print_udev = true;
- }
-
- /* set signal handlers */
- act.sa_handler = sig_handler;
- act.sa_flags = SA_RESTART;
- sigaction(SIGINT, &act, NULL);
- sigaction(SIGTERM, &act, NULL);
- sigemptyset(&mask);
- sigaddset(&mask, SIGINT);
- sigaddset(&mask, SIGTERM);
- sigprocmask(SIG_UNBLOCK, &mask, NULL);
-
- fd_ep = epoll_create1(EPOLL_CLOEXEC);
- if (fd_ep < 0) {
- log_error_errno(errno, "error creating epoll fd: %m");
- return 1;
- }
-
- 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");
- return 1;
- }
- udev_monitor_set_receive_buffer_size(udev_monitor, 128*1024*1024);
- fd_udev = udev_monitor_get_fd(udev_monitor);
-
- 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);
- }
-
- udev_list_entry_foreach(entry, udev_list_get_entry(&tag_match_list)) {
- const char *tag = udev_list_entry_get_name(entry);
-
- if (udev_monitor_filter_add_match_tag(udev_monitor, tag) < 0)
- fprintf(stderr, "error: unable to apply tag filter '%s'\n", tag);
- }
-
- if (udev_monitor_enable_receiving(udev_monitor) < 0) {
- fprintf(stderr, "error: unable to subscribe to udev events\n");
- return 2;
- }
-
- memzero(&ep_udev, sizeof(struct epoll_event));
- ep_udev.events = EPOLLIN;
- ep_udev.data.fd = fd_udev;
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
- log_error_errno(errno, "fail to add fd to epoll: %m");
- return 2;
- }
-
- 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");
- return 3;
- }
- udev_monitor_set_receive_buffer_size(kernel_monitor, 128*1024*1024);
- fd_kernel = udev_monitor_get_fd(kernel_monitor);
-
- 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");
- return 4;
- }
-
- memzero(&ep_kernel, sizeof(struct epoll_event));
- ep_kernel.events = EPOLLIN;
- ep_kernel.data.fd = fd_kernel;
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_kernel, &ep_kernel) < 0) {
- log_error_errno(errno, "fail to add fd to epoll: %m");
- return 5;
- }
-
- printf("KERNEL - the kernel uevent\n");
- }
- printf("\n");
-
- while (!udev_exit) {
- int fdcount;
- struct epoll_event ev[4];
- int i;
-
- fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);
- if (fdcount < 0) {
- if (errno != EINTR)
- fprintf(stderr, "error receiving uevent message: %m\n");
- continue;
- }
-
- for (i = 0; i < fdcount; i++) {
- if (ev[i].data.fd == fd_kernel && ev[i].events & EPOLLIN) {
- struct udev_device *device;
-
- device = udev_monitor_receive_device(kernel_monitor);
- if (device == NULL)
- continue;
- print_device(device, "KERNEL", prop);
- udev_device_unref(device);
- } else if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) {
- struct udev_device *device;
-
- device = udev_monitor_receive_device(udev_monitor);
- if (device == NULL)
- continue;
- print_device(device, "UDEV", prop);
- udev_device_unref(device);
- }
- }
- }
-
- return 0;
-}
-
-const struct udevadm_cmd udevadm_monitor = {
- .name = "monitor",
- .cmd = adm_monitor,
- .help = "Listen to kernel and udev events",
-};
~ianmdlvl / elogind.git / blobdiff