./tools/notsd-move

1 files changed, 281 insertions, 0 deletions

diff --git a/src/grp-udev/udevadm/udevadm-monitor.c b/src/grp-udev/udevadm/udevadm-monitor.c
new file mode 100644
index 0000000000..3503b19a21
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-monitor.c
@@ -0,0 +1,281 @@
+/*
+ * 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 <errno.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/formats-util.h"
+#include "systemd-shared/udev-util.h"
+#include "udev.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;
+
+        assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
+        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);
+
+        /* Callers are expecting to see events as they happen: Line buffering */
+        setlinebuf(stdout);
+
+        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",
+};