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Commit | Line | Data |
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1bc33626 | 1 | /* |
a00ff5db | 2 | * Copyright (C) 2004-2010 Kay Sievers <kay.sievers@vrfy.org> |
1bc33626 | 3 | * |
55e9959b KS |
4 | * This program is free software: you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation, either version 2 of the License, or | |
7 | * (at your option) any later version. | |
1bc33626 | 8 | * |
55e9959b KS |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
1bc33626 KS |
16 | */ |
17 | ||
18 | #include <unistd.h> | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
9571122e | 21 | #include <stddef.h> |
1bc33626 KS |
22 | #include <string.h> |
23 | #include <fcntl.h> | |
1bc33626 | 24 | #include <errno.h> |
9ae611be | 25 | #include <signal.h> |
0d2516c3 | 26 | #include <getopt.h> |
2315e570 | 27 | #include <time.h> |
38ff77b8 | 28 | #include <sys/time.h> |
1bc33626 KS |
29 | #include <sys/socket.h> |
30 | #include <sys/un.h> | |
578cd510 | 31 | #include <sys/epoll.h> |
62821d0d | 32 | #include <linux/types.h> |
1bc33626 | 33 | #include <linux/netlink.h> |
1bc33626 KS |
34 | |
35 | #include "udev.h" | |
1bc33626 | 36 | |
578cd510 | 37 | static bool udev_exit; |
1bc33626 | 38 | |
619b97ff | 39 | static void sig_handler(int signum) |
9ae611be KS |
40 | { |
41 | if (signum == SIGINT || signum == SIGTERM) | |
578cd510 | 42 | udev_exit = true; |
9ae611be KS |
43 | } |
44 | ||
b0d5e0df | 45 | static void print_device(struct udev_device *device, const char *source, int prop) |
0de33a61 | 46 | { |
2315e570 | 47 | struct timespec ts; |
0de33a61 | 48 | |
2315e570 | 49 | clock_gettime(CLOCK_MONOTONIC, &ts); |
0de33a61 KS |
50 | printf("%-6s[%llu.%06u] %-8s %s (%s)\n", |
51 | source, | |
2315e570 | 52 | (unsigned long long) ts.tv_sec, (unsigned int) ts.tv_nsec/1000, |
0de33a61 KS |
53 | udev_device_get_action(device), |
54 | udev_device_get_devpath(device), | |
55 | udev_device_get_subsystem(device)); | |
b0d5e0df | 56 | if (prop) { |
0de33a61 KS |
57 | struct udev_list_entry *list_entry; |
58 | ||
59 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) | |
60 | printf("%s=%s\n", | |
61 | udev_list_entry_get_name(list_entry), | |
62 | udev_list_entry_get_value(list_entry)); | |
63 | printf("\n"); | |
64 | } | |
65 | } | |
66 | ||
1985c76e | 67 | static int adm_monitor(struct udev *udev, int argc, char *argv[]) |
1bc33626 | 68 | { |
9ae611be | 69 | struct sigaction act; |
bc3ec7bd | 70 | sigset_t mask; |
0d2516c3 | 71 | int option; |
578cd510 KS |
72 | bool prop = false; |
73 | bool print_kernel = false; | |
74 | bool print_udev = false; | |
869c9031 KS |
75 | struct udev_list subsystem_match_list; |
76 | struct udev_list tag_match_list; | |
8a4c287d | 77 | struct udev_monitor *udev_monitor = NULL; |
9b3a33a9 | 78 | struct udev_monitor *kernel_monitor = NULL; |
578cd510 KS |
79 | int fd_ep = -1; |
80 | int fd_kernel = -1, fd_udev = -1; | |
81 | struct epoll_event ep_kernel, ep_udev; | |
8a4c287d | 82 | int rc = 0; |
1bc33626 | 83 | |
0d2516c3 | 84 | static const struct option options[] = { |
b0d5e0df | 85 | { "property", no_argument, NULL, 'p' }, |
033e9f8c KS |
86 | { "environment", no_argument, NULL, 'e' }, |
87 | { "kernel", no_argument, NULL, 'k' }, | |
88 | { "udev", no_argument, NULL, 'u' }, | |
a9550eb1 | 89 | { "subsystem-match", required_argument, NULL, 's' }, |
28460195 | 90 | { "tag-match", required_argument, NULL, 't' }, |
033e9f8c | 91 | { "help", no_argument, NULL, 'h' }, |
0d2516c3 KS |
92 | {} |
93 | }; | |
94 | ||
869c9031 KS |
95 | udev_list_init(udev, &subsystem_match_list, true); |
96 | udev_list_init(udev, &tag_match_list, true); | |
578cd510 | 97 | |
88cbfb09 | 98 | for (;;) { |
28460195 | 99 | option = getopt_long(argc, argv, "pekus:t:h", options, NULL); |
0d2516c3 KS |
100 | if (option == -1) |
101 | break; | |
102 | ||
103 | switch (option) { | |
b0d5e0df | 104 | case 'p': |
0d2516c3 | 105 | case 'e': |
578cd510 | 106 | prop = true; |
0d2516c3 KS |
107 | break; |
108 | case 'k': | |
578cd510 | 109 | print_kernel = true; |
0d2516c3 KS |
110 | break; |
111 | case 'u': | |
578cd510 | 112 | print_udev = true; |
0d2516c3 | 113 | break; |
a9550eb1 | 114 | case 's': |
bb7045a0 KS |
115 | { |
116 | char subsys[UTIL_NAME_SIZE]; | |
117 | char *devtype; | |
118 | ||
065db052 | 119 | util_strscpy(subsys, sizeof(subsys), optarg); |
a00ff5db | 120 | devtype = strchr(subsys, '/'); |
bb7045a0 KS |
121 | if (devtype != NULL) { |
122 | devtype[0] = '\0'; | |
123 | devtype++; | |
124 | } | |
869c9031 | 125 | udev_list_entry_add(&subsystem_match_list, subsys, devtype); |
bb7045a0 KS |
126 | break; |
127 | } | |
28460195 | 128 | case 't': |
869c9031 | 129 | udev_list_entry_add(&tag_match_list, optarg, NULL); |
28460195 | 130 | break; |
0d2516c3 | 131 | case 'h': |
b0d5e0df | 132 | printf("Usage: udevadm monitor [--property] [--kernel] [--udev] [--help]\n" |
a00ff5db KS |
133 | " --property print the event properties\n" |
134 | " --kernel print kernel uevents\n" | |
135 | " --udev print udev events\n" | |
136 | " --subsystem-match=<subsystem[/devtype]> filter events by subsystem\n" | |
28460195 | 137 | " --tag-match=<tag> filter events by tag\n" |
f1e7e360 | 138 | " --help\n\n"); |
0d2516c3 | 139 | goto out; |
e261c5f6 HH |
140 | default: |
141 | rc = 1; | |
142 | goto out; | |
d9712287 | 143 | } |
2b996ad1 KS |
144 | } |
145 | ||
7d563a17 | 146 | if (!print_kernel && !print_udev) { |
578cd510 KS |
147 | print_kernel = true; |
148 | print_udev = true; | |
0d2516c3 KS |
149 | } |
150 | ||
9ae611be KS |
151 | /* set signal handlers */ |
152 | memset(&act, 0x00, sizeof(struct sigaction)); | |
619b97ff | 153 | act.sa_handler = sig_handler; |
9ae611be KS |
154 | sigemptyset(&act.sa_mask); |
155 | act.sa_flags = SA_RESTART; | |
156 | sigaction(SIGINT, &act, NULL); | |
157 | sigaction(SIGTERM, &act, NULL); | |
bc3ec7bd KS |
158 | sigemptyset(&mask); |
159 | sigaddset(&mask, SIGINT); | |
160 | sigaddset(&mask, SIGTERM); | |
161 | sigprocmask(SIG_UNBLOCK, &mask, NULL); | |
9ae611be | 162 | |
578cd510 KS |
163 | fd_ep = epoll_create1(EPOLL_CLOEXEC); |
164 | if (fd_ep < 0) { | |
165 | err(udev, "error creating epoll fd: %m\n"); | |
166 | goto out; | |
167 | } | |
168 | ||
7d563a17 KS |
169 | printf("monitor will print the received events for:\n"); |
170 | if (print_udev) { | |
a9550eb1 KS |
171 | struct udev_list_entry *entry; |
172 | ||
f2b93744 | 173 | udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); |
8a4c287d | 174 | if (udev_monitor == NULL) { |
3111a33e | 175 | fprintf(stderr, "error: unable to create netlink socket\n"); |
8a4c287d KS |
176 | rc = 1; |
177 | goto out; | |
178 | } | |
0fe3c26e | 179 | udev_monitor_set_receive_buffer_size(udev_monitor, 128*1024*1024); |
578cd510 | 180 | fd_udev = udev_monitor_get_fd(udev_monitor); |
a9550eb1 KS |
181 | |
182 | udev_list_entry_foreach(entry, udev_list_get_entry(&subsystem_match_list)) { | |
183 | const char *subsys = udev_list_entry_get_name(entry); | |
bb7045a0 | 184 | const char *devtype = udev_list_entry_get_value(entry); |
a9550eb1 | 185 | |
bb7045a0 | 186 | if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, subsys, devtype) < 0) |
a9550eb1 KS |
187 | fprintf(stderr, "error: unable to apply subsystem filter '%s'\n", subsys); |
188 | } | |
189 | ||
28460195 KS |
190 | udev_list_entry_foreach(entry, udev_list_get_entry(&tag_match_list)) { |
191 | const char *tag = udev_list_entry_get_name(entry); | |
192 | ||
193 | if (udev_monitor_filter_add_match_tag(udev_monitor, tag) < 0) | |
194 | fprintf(stderr, "error: unable to apply tag filter '%s'\n", tag); | |
195 | } | |
196 | ||
8a4c287d | 197 | if (udev_monitor_enable_receiving(udev_monitor) < 0) { |
3111a33e | 198 | fprintf(stderr, "error: unable to subscribe to udev events\n"); |
8a4c287d | 199 | rc = 2; |
0d2516c3 | 200 | goto out; |
8a4c287d | 201 | } |
578cd510 KS |
202 | |
203 | memset(&ep_udev, 0, sizeof(struct epoll_event)); | |
204 | ep_udev.events = EPOLLIN; | |
205 | ep_udev.data.fd = fd_udev; | |
206 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) { | |
207 | err(udev, "fail to add fd to epoll: %m\n"); | |
208 | goto out; | |
209 | } | |
210 | ||
498c2750 | 211 | printf("UDEV - the event which udev sends out after rule processing\n"); |
0d2516c3 | 212 | } |
578cd510 | 213 | |
7d563a17 | 214 | if (print_kernel) { |
bb7045a0 KS |
215 | struct udev_list_entry *entry; |
216 | ||
f2b93744 | 217 | kernel_monitor = udev_monitor_new_from_netlink(udev, "kernel"); |
9b3a33a9 | 218 | if (kernel_monitor == NULL) { |
3111a33e | 219 | fprintf(stderr, "error: unable to create netlink socket\n"); |
8a4c287d | 220 | rc = 3; |
0d2516c3 | 221 | goto out; |
8a4c287d | 222 | } |
044bd2bc | 223 | udev_monitor_set_receive_buffer_size(kernel_monitor, 128*1024*1024); |
578cd510 | 224 | fd_kernel = udev_monitor_get_fd(kernel_monitor); |
bb7045a0 KS |
225 | |
226 | udev_list_entry_foreach(entry, udev_list_get_entry(&subsystem_match_list)) { | |
227 | const char *subsys = udev_list_entry_get_name(entry); | |
228 | ||
229 | if (udev_monitor_filter_add_match_subsystem_devtype(kernel_monitor, subsys, NULL) < 0) | |
230 | fprintf(stderr, "error: unable to apply subsystem filter '%s'\n", subsys); | |
231 | } | |
232 | ||
9b3a33a9 | 233 | if (udev_monitor_enable_receiving(kernel_monitor) < 0) { |
3111a33e | 234 | fprintf(stderr, "error: unable to subscribe to kernel events\n"); |
9b3a33a9 KS |
235 | rc = 4; |
236 | goto out; | |
237 | } | |
578cd510 KS |
238 | |
239 | memset(&ep_kernel, 0, sizeof(struct epoll_event)); | |
240 | ep_kernel.events = EPOLLIN; | |
241 | ep_kernel.data.fd = fd_kernel; | |
242 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_kernel, &ep_kernel) < 0) { | |
243 | err(udev, "fail to add fd to epoll: %m\n"); | |
244 | goto out; | |
245 | } | |
246 | ||
f2b93744 | 247 | printf("KERNEL - the kernel uevent\n"); |
0d2516c3 KS |
248 | } |
249 | printf("\n"); | |
2b996ad1 | 250 | |
9ae611be | 251 | while (!udev_exit) { |
40caaeec | 252 | int fdcount; |
578cd510 KS |
253 | struct epoll_event ev[4]; |
254 | int i; | |
1bc33626 | 255 | |
578cd510 | 256 | fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1); |
40caaeec | 257 | if (fdcount < 0) { |
1bc33626 | 258 | if (errno != EINTR) |
659353f5 | 259 | fprintf(stderr, "error receiving uevent message: %m\n"); |
1bc33626 KS |
260 | continue; |
261 | } | |
262 | ||
578cd510 KS |
263 | for (i = 0; i < fdcount; i++) { |
264 | if (ev[i].data.fd == fd_kernel && ev[i].events & EPOLLIN) { | |
265 | struct udev_device *device; | |
0de33a61 | 266 | |
578cd510 KS |
267 | device = udev_monitor_receive_device(kernel_monitor); |
268 | if (device == NULL) | |
269 | continue; | |
270 | print_device(device, "KERNEL", prop); | |
271 | udev_device_unref(device); | |
13052c02 | 272 | } else if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) { |
578cd510 | 273 | struct udev_device *device; |
0de33a61 | 274 | |
578cd510 KS |
275 | device = udev_monitor_receive_device(udev_monitor); |
276 | if (device == NULL) | |
277 | continue; | |
278 | print_device(device, "UDEV", prop); | |
279 | udev_device_unref(device); | |
280 | } | |
1bc33626 KS |
281 | } |
282 | } | |
40caaeec | 283 | out: |
578cd510 KS |
284 | if (fd_ep >= 0) |
285 | close(fd_ep); | |
8a4c287d | 286 | udev_monitor_unref(udev_monitor); |
9b3a33a9 | 287 | udev_monitor_unref(kernel_monitor); |
869c9031 KS |
288 | udev_list_cleanup(&subsystem_match_list); |
289 | udev_list_cleanup(&tag_match_list); | |
8a4c287d | 290 | return rc; |
1bc33626 | 291 | } |
1985c76e KS |
292 | |
293 | const struct udevadm_cmd udevadm_monitor = { | |
294 | .name = "monitor", | |
295 | .cmd = adm_monitor, | |
296 | .help = "listen to kernel and udev events", | |
297 | }; |