X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev%2Fudevadm-monitor.c;h=10b2f2e71b8c1ce0f2d4b49f153bcb30342b7115;hp=29f819f43971840a043ad5f52426b7f5423e744f;hb=dacea9ff6be55f1b115c13b1ab530812d0d66879;hpb=9b3a33a9ff9386b4af3229762fa7673e670b00e7 diff --git a/udev/udevadm-monitor.c b/udev/udevadm-monitor.c index 29f819f43..10b2f2e71 100644 --- a/udev/udevadm-monitor.c +++ b/udev/udevadm-monitor.c @@ -1,19 +1,18 @@ /* - * Copyright (C) 2004-2006 Kay Sievers + * Copyright (C) 2004-2008 Kay Sievers * - * 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. + * 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 . */ #include @@ -42,16 +41,27 @@ static void asmlinkage sig_handler(int signum) udev_exit = 1; } -static int print_properties_cb(struct udev_device *udev_device, const char *key, const char *value, void *data) +static void print_device(struct udev_device *device, const char *source, int env) { - printf("%s=%s\n", key, value); - return 0; -} - -static void print_properties(struct udev_device *device) -{ - udev_device_get_properties(device, print_properties_cb, NULL); - printf("\n"); + 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[]) @@ -61,21 +71,24 @@ int udevadm_monitor(struct udev *udev, int argc, char *argv[]) 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", 0, NULL, 'e' }, - { "kernel", 0, NULL, 'k' }, - { "udev", 0, NULL, 'u' }, - { "help", 0, NULL, 'h' }, + { "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, "ekuh", options, NULL); + option = getopt_long(argc, argv, "ekus:h", options, NULL); if (option == -1) break; @@ -89,12 +102,15 @@ int udevadm_monitor(struct udev *udev, int argc, char *argv[]) case 'u': print_udev = 1; break; + case 's': + udev_list_entry_add(udev, &subsystem_match_list, optarg, NULL, 1, 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" - " --help print this help text\n\n"); + " --help\n\n"); default: goto out; } @@ -105,11 +121,6 @@ int udevadm_monitor(struct udev *udev, int argc, char *argv[]) print_udev =1; } - if (getuid() != 0 && print_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; @@ -120,36 +131,47 @@ int udevadm_monitor(struct udev *udev, int argc, char *argv[]) printf("monitor will print the received events for:\n"); if (print_udev) { - udev_monitor = udev_monitor_new_from_socket(udev, "@/org/kernel/udev/monitor"); + 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); + + if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, subsys, NULL) < 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"); + printf("UDEV - the event which udev sends out after rule processing\n"); } if (print_kernel) { - kernel_monitor = udev_monitor_new_from_netlink(udev); + 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; } if (udev_monitor_enable_receiving(kernel_monitor) < 0) { + fprintf(stderr, "error: unable to subscribe to kernel events\n"); rc = 4; goto out; } - printf("UEVENT the kernel uevent\n"); + printf("KERNEL - the kernel uevent\n"); } printf("\n"); while (!udev_exit) { int fdcount; - struct timeval tv; - struct timezone tz; - char timestr[64]; FD_ZERO(&readfds); if (kernel_monitor != NULL) @@ -161,39 +183,27 @@ int udevadm_monitor(struct udev *udev, int argc, char *argv[]) &readfds, NULL, NULL, NULL); if (fdcount < 0) { if (errno != EINTR) - fprintf(stderr, "error receiving uevent message: %s\n", strerror(errno)); + fprintf(stderr, "error receiving uevent message: %m\n"); 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 ((kernel_monitor != NULL) && FD_ISSET(udev_monitor_get_fd(kernel_monitor), &readfds)) { - struct udev_device *device = udev_monitor_receive_device(kernel_monitor); + struct udev_device *device; + + device = udev_monitor_receive_device(kernel_monitor); if (device == NULL) continue; - printf("UEVENT[%s] %-8s %s (%s)\n", timestr, - udev_device_get_action(device), - udev_device_get_devpath(device), - udev_device_get_subsystem(device)); - if (env) - print_properties(device); + 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 = udev_monitor_receive_device(udev_monitor); + struct udev_device *device; + + device = udev_monitor_receive_device(udev_monitor); if (device == NULL) continue; - printf("UDEV [%s] %-8s %s (%s)\n", timestr, - udev_device_get_action(device), - udev_device_get_devpath(device), - udev_device_get_subsystem(device)); - if (env) - print_properties(device); + print_device(device, "UDEV", env); udev_device_unref(device); } } @@ -201,5 +211,6 @@ int udevadm_monitor(struct udev *udev, int argc, char *argv[]) out: udev_monitor_unref(udev_monitor); udev_monitor_unref(kernel_monitor); + udev_list_cleanup_entries(udev, &subsystem_match_list); return rc; }