merge udev/, libudev/, systemd/ files in src/; move extras/ to src/

1 files changed, 297 insertions, 0 deletions

diff --git a/src/udevadm-monitor.c b/src/udevadm-monitor.c
new file mode 100644
index 0000000000..64913dbd55
--- /dev/null
+++ b/src/udevadm-monitor.c
@@ -0,0 +1,297 @@
+/*
+ * Copyright (C) 2004-2010 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, 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 <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 <time.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/epoll.h>
+#include <linux/types.h>
+#include <linux/netlink.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;
+
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	printf("%-6s[%llu.%06u] %-8s %s (%s)\n",
+	       source,
+	       (unsigned long long) ts.tv_sec, (unsigned int) 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 int adm_monitor(struct udev *udev, int argc, char *argv[])
+{
+	struct sigaction act;
+	sigset_t mask;
+	int option;
+	bool prop = false;
+	bool print_kernel = false;
+	bool print_udev = false;
+	struct udev_list subsystem_match_list;
+	struct udev_list tag_match_list;
+	struct udev_monitor *udev_monitor = NULL;
+	struct udev_monitor *kernel_monitor = NULL;
+	int fd_ep = -1;
+	int fd_kernel = -1, fd_udev = -1;
+	struct epoll_event ep_kernel, ep_udev;
+	int rc = 0;
+
+	static const struct option options[] = {
+		{ "property", no_argument, NULL, 'p' },
+		{ "environment", no_argument, NULL, 'e' },
+		{ "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);
+
+	for (;;) {
+		option = getopt_long(argc, argv, "pekus:t:h", options, NULL);
+		if (option == -1)
+			break;
+
+		switch (option) {
+		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;
+
+				util_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':
+			printf("Usage: udevadm monitor [--property] [--kernel] [--udev] [--help]\n"
+			       "  --property                              print the event properties\n"
+			       "  --kernel                                print kernel uevents\n"
+			       "  --udev                                  print udev events\n"
+			       "  --subsystem-match=<subsystem[/devtype]> filter events by subsystem\n"
+			       "  --tag-match=<tag>                       filter events by tag\n"
+			       "  --help\n\n");
+			goto out;
+		default:
+			rc = 1;
+			goto out;
+		}
+	}
+
+	if (!print_kernel && !print_udev) {
+		print_kernel = true;
+		print_udev = true;
+	}
+
+	/* set signal handlers */
+	memset(&act, 0x00, sizeof(struct sigaction));
+	act.sa_handler = sig_handler;
+	sigemptyset(&act.sa_mask);
+	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) {
+		err(udev, "error creating epoll fd: %m\n");
+		goto out;
+	}
+
+	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");
+			rc = 1;
+			goto out;
+		}
+		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");
+			rc = 2;
+			goto out;
+		}
+
+		memset(&ep_udev, 0, 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) {
+			err(udev, "fail to add fd to epoll: %m\n");
+			goto out;
+		}
+
+		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");
+			rc = 3;
+			goto out;
+		}
+		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");
+			rc = 4;
+			goto out;
+		}
+
+		memset(&ep_kernel, 0, 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) {
+			err(udev, "fail to add fd to epoll: %m\n");
+			goto out;
+		}
+
+		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, ARRAY_SIZE(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);
+			}
+		}
+	}
+out:
+	if (fd_ep >= 0)
+		close(fd_ep);
+	udev_monitor_unref(udev_monitor);
+	udev_monitor_unref(kernel_monitor);
+	udev_list_cleanup(&subsystem_match_list);
+	udev_list_cleanup(&tag_match_list);
+	return rc;
+}
+
+const struct udevadm_cmd udevadm_monitor = {
+	.name = "monitor",
+	.cmd = adm_monitor,
+	.help = "listen to kernel and udev events",
+};