+++ /dev/null
-/*
- * Copyright (C) 2004-2006 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 version 2 of the License.
- *
- * 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, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- */
-
-#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"
-#include "udevd.h"
-
-static int uevent_netlink_sock = -1;
-static int udev_monitor_sock = -1;
-static volatile int udev_exit;
-
-static int init_udev_monitor_socket(void)
-{
- struct sockaddr_un saddr;
- socklen_t addrlen;
- int retval;
-
- memset(&saddr, 0x00, sizeof(saddr));
- saddr.sun_family = AF_LOCAL;
- /* use abstract namespace for socket path */
- strcpy(&saddr.sun_path[1], "/org/kernel/udev/monitor");
- addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
-
- udev_monitor_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
- if (udev_monitor_sock == -1) {
- fprintf(stderr, "error getting socket: %s\n", strerror(errno));
- return -1;
- }
-
- /* the bind takes care of ensuring only one copy running */
- retval = bind(udev_monitor_sock, (struct sockaddr *) &saddr, addrlen);
- if (retval < 0) {
- fprintf(stderr, "bind failed: %s\n", strerror(errno));
- close(udev_monitor_sock);
- udev_monitor_sock = -1;
- return -1;
- }
-
- return 0;
-}
-
-static int init_uevent_netlink_sock(void)
-{
- struct sockaddr_nl snl;
- int retval;
-
- memset(&snl, 0x00, sizeof(struct sockaddr_nl));
- snl.nl_family = AF_NETLINK;
- snl.nl_pid = getpid();
- snl.nl_groups = 1;
-
- uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
- if (uevent_netlink_sock == -1) {
- fprintf(stderr, "error getting socket: %s\n", strerror(errno));
- return -1;
- }
-
- retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
- sizeof(struct sockaddr_nl));
- if (retval < 0) {
- fprintf(stderr, "bind failed: %s\n", strerror(errno));
- close(uevent_netlink_sock);
- uevent_netlink_sock = -1;
- return -1;
- }
-
- return 0;
-}
-
-static void asmlinkage sig_handler(int signum)
-{
- if (signum == SIGINT || signum == SIGTERM)
- udev_exit = 1;
-}
-
-static const char *search_key(const char *searchkey, const char *buf, size_t buflen)
-{
- size_t bufpos = 0;
- size_t searchkeylen = strlen(searchkey);
-
- while (bufpos < buflen) {
- const char *key;
- int keylen;
-
- key = &buf[bufpos];
- keylen = strlen(key);
- if (keylen == 0)
- break;
- if ((strncmp(searchkey, key, searchkeylen) == 0) && key[searchkeylen] == '=')
- return &key[searchkeylen + 1];
- bufpos += keylen + 1;
- }
- return NULL;
-}
-
-int udevadm_monitor(int argc, char *argv[])
-{
- struct sigaction act;
- int option;
- int env = 0;
- int kernel = 0;
- int udev = 0;
- fd_set readfds;
- int retval = 0;
-
- static const struct option options[] = {
- { "environment", 0, NULL, 'e' },
- { "kernel", 0, NULL, 'k' },
- { "udev", 0, NULL, 'u' },
- { "help", 0, NULL, 'h' },
- {}
- };
-
- while (1) {
- option = getopt_long(argc, argv, "ekuh", options, NULL);
- if (option == -1)
- break;
-
- switch (option) {
- case 'e':
- env = 1;
- break;
- case 'k':
- kernel = 1;
- break;
- case 'u':
- udev = 1;
- 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"
- " --help print this help text\n\n");
- default:
- goto out;
- }
- }
-
- if (!kernel && !udev) {
- kernel = 1;
- udev =1;
- }
-
- if (getuid() != 0 && kernel) {
- fprintf(stderr, "root privileges needed to subscribe to kernel events\n");
- goto out;
- }
-
- /* 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("udevmonitor will print the received events for:\n");
- if (udev) {
- retval = init_udev_monitor_socket();
- if (retval)
- goto out;
- printf("UDEV the event which udev sends out after rule processing\n");
- }
- if (kernel) {
- retval = init_uevent_netlink_sock();
- if (retval)
- goto out;
- printf("UEVENT the kernel uevent\n");
- }
- printf("\n");
-
- while (!udev_exit) {
- char buf[UEVENT_BUFFER_SIZE*2];
- ssize_t buflen;
- ssize_t bufpos;
- ssize_t keys;
- int fdcount;
- struct timeval tv;
- struct timezone tz;
- char timestr[64];
- const char *source = NULL;
- const char *devpath, *action, *subsys;
-
- buflen = 0;
- FD_ZERO(&readfds);
- if (uevent_netlink_sock >= 0)
- FD_SET(uevent_netlink_sock, &readfds);
- if (udev_monitor_sock >= 0)
- FD_SET(udev_monitor_sock, &readfds);
-
- fdcount = select(UDEV_MAX(uevent_netlink_sock, udev_monitor_sock)+1, &readfds, NULL, NULL, NULL);
- if (fdcount < 0) {
- if (errno != EINTR)
- fprintf(stderr, "error receiving uevent message: %s\n", strerror(errno));
- continue;
- }
-
- if (gettimeofday(&tv, &tz) == 0) {
- snprintf(timestr, sizeof(timestr), "%llu.%06u",
- (unsigned long long) tv.tv_sec, (unsigned int) tv.tv_usec);
- } else
- timestr[0] = '\0';
-
- if ((uevent_netlink_sock >= 0) && FD_ISSET(uevent_netlink_sock, &readfds)) {
- buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
- if (buflen <= 0) {
- fprintf(stderr, "error receiving uevent message: %s\n", strerror(errno));
- continue;
- }
- source = "UEVENT";
- }
-
- if ((udev_monitor_sock >= 0) && FD_ISSET(udev_monitor_sock, &readfds)) {
- buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
- if (buflen <= 0) {
- fprintf(stderr, "error receiving udev message: %s\n", strerror(errno));
- continue;
- }
- source = "UDEV ";
- }
-
- if (buflen == 0)
- continue;
-
- keys = strlen(buf) + 1; /* start of payload */
- devpath = search_key("DEVPATH", &buf[keys], buflen);
- action = search_key("ACTION", &buf[keys], buflen);
- subsys = search_key("SUBSYSTEM", &buf[keys], buflen);
- printf("%s[%s] %-8s %s (%s)\n", source, timestr, action, devpath, subsys);
-
- /* print environment */
- bufpos = keys;
- if (env) {
- while (bufpos < buflen) {
- int keylen;
- char *key;
-
- key = &buf[bufpos];
- keylen = strlen(key);
- if (keylen == 0)
- break;
- printf("%s\n", key);
- bufpos += keylen + 1;
- }
- printf("\n");
- }
- }
-
-out:
- if (uevent_netlink_sock >= 0)
- close(uevent_netlink_sock);
- if (udev_monitor_sock >= 0)
- close(udev_monitor_sock);
-
- if (retval)
- return 1;
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff