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1bc3362678
This rule: RUN+="socket:/org/kernel/udev/monitor" send the event to the running monitor. Running udevstart give a nice monitor output. Also the delay between the kernel uevent and the udev udev event can be investigated: pim:/home/kay/src/udev-kay # ./udevmonitor UEVENT[1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1 UEVENT[1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0 UEVENT[1122920113] add@/class/scsi_host/host12 UEVENT[1122920113] add@/class/usb_device/usbdev2.99 UEVENT[1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0/host12/target12:0:0/12:0:0:0 UDEV [1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1 UEVENT[1122920113] add@/block/sda UEVENT[1122920113] add@/class/scsi_generic/sg0 UEVENT[1122920113] add@/class/scsi_device/12:0:0:0 UDEV [1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0 UDEV [1122920113] add@/class/scsi_host/host12 UDEV [1122920113] add@/class/usb_device/usbdev2.99 UDEV [1122920113] add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0/host12/target12:0:0/12:0:0:0 UDEV [1122920113] add@/block/sda UDEV [1122920113] add@/class/scsi_generic/sg0 UDEV [1122920113] add@/class/scsi_device/12:0:0:0 UEVENT[1122920115] add@/block/sda/sda1 UDEV [1122920115] add@/block/sda/sda1 pim:/home/kay/src/udev-kay # ./udevmonitor --env UDEV [1122920185] add@/block/sda/sda1 ACTION=add DEVPATH=/block/sda/sda1 SUBSYSTEM=block SEQNUM=2159 MINOR=1 MAJOR=8 PHYSDEVPATH=/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1:1.0/host13/target13:0:0/13:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd UDEVD_EVENT=1 UDEV_LOG=3 ID_VENDOR=IBM ID_MODEL=Memory_Key ID_REVISION=3.04 ID_SERIAL=IBM_Memory_Key_0218B301030027E8 ID_TYPE=disk ID_BUS=usb ID_PATH=usb-0218B301030027E8:0:0:0 ID_FS_USAGE=filesystem ID_FS_TYPE=vfat ID_FS_VERSION=FAT16 ID_FS_UUID=42D8-9E02 ID_FS_LABEL_SAFE=s_p_c DEVNAME=/dev/sda1 Signed-off-by: Kay Sievers <kay.sievers@suse.de>
186 lines
4.3 KiB
C
186 lines
4.3 KiB
C
/*
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* udevmonitor.c
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*
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* Copyright (C) 2004-2005 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 it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/select.h>
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#include <linux/netlink.h>
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#include <asm/types.h>
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#include "udev.h"
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#include "udevd.h"
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static int uevent_netlink_sock;
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static int udev_monitor_sock;
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static int init_udev_monitor_socket(void)
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{
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struct sockaddr_un saddr;
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socklen_t addrlen;
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const int feature_on = 1;
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int retval;
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memset(&saddr, 0x00, sizeof(saddr));
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saddr.sun_family = AF_LOCAL;
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/* use abstract namespace for socket path */
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strcpy(&saddr.sun_path[1], "/org/kernel/udev/monitor");
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addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
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udev_monitor_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
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if (udev_monitor_sock == -1) {
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fprintf(stderr, "error getting socket, %s\n", strerror(errno));
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return -1;
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}
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/* the bind takes care of ensuring only one copy running */
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retval = bind(udev_monitor_sock, (struct sockaddr *) &saddr, addrlen);
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if (retval < 0) {
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fprintf(stderr, "bind failed, %s\n", strerror(errno));
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close(udev_monitor_sock);
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return -1;
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}
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/* enable receiving of the sender credentials */
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setsockopt(udev_monitor_sock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
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return 0;
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}
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static int init_uevent_netlink_sock(void)
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{
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struct sockaddr_nl snl;
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int retval;
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memset(&snl, 0x00, sizeof(struct sockaddr_nl));
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snl.nl_family = AF_NETLINK;
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snl.nl_pid = getpid();
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snl.nl_groups = 0xffffffff;
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uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
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if (uevent_netlink_sock == -1) {
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fprintf(stderr, "error getting socket, %s\n", strerror(errno));
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return -1;
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}
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retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
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sizeof(struct sockaddr_nl));
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if (retval < 0) {
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fprintf(stderr, "bind failed, %s\n", strerror(errno));
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close(uevent_netlink_sock);
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uevent_netlink_sock = -1;
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return -1;
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int env = 0;
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int maxsockplus;
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fd_set readfds;
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int retval;
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if (getuid() != 0) {
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printf("need to be root, exit\n");
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exit(1);
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}
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if (argc == 2 && strstr(argv[1], "--env"))
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env = 1;
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init_uevent_netlink_sock();
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init_udev_monitor_socket();
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FD_ZERO(&readfds);
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FD_SET(uevent_netlink_sock, &readfds);
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FD_SET(udev_monitor_sock, &readfds);
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maxsockplus = udev_monitor_sock+1;
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while (1) {
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static char buf[UEVENT_BUFFER_SIZE*2];
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ssize_t buflen;
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fd_set workreadfds;
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buflen = 0;
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workreadfds = readfds;
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retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
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if (retval < 0) {
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if (errno != EINTR)
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fprintf(stderr, "error receiving uevent message\n");
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continue;
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}
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if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
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buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
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if (buflen <= 0) {
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fprintf(stderr, "error receiving uevent message\n");
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continue;
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}
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printf("UEVENT[%i] %s\n", time(NULL), buf);
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}
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if (FD_ISSET(udev_monitor_sock, &workreadfds)) {
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buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
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if (buflen <= 0) {
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fprintf(stderr, "error receiving udev message\n");
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continue;
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}
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printf("UDEV [%i] %s\n", time(NULL), buf);
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}
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if (buflen == 0)
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continue;
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/* print environment */
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if (env) {
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size_t bufpos;
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/* start of payload */
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bufpos = strlen(buf) + 1;
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while (bufpos < (size_t)buflen) {
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int keylen;
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char *key;
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key = &buf[bufpos];
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keylen = strlen(key);
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if (keylen == 0)
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break;
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printf("%s\n", key);
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bufpos += keylen + 1;
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}
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printf("\n");
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}
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}
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close(uevent_netlink_sock);
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close(udev_monitor_sock);
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exit(1);
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}
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