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Commit | Line | Data |
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e7145211 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
d46f37fd | 2 | |
d46f37fd | 3 | #include <ctype.h> |
07630cea LP |
4 | #include <errno.h> |
5 | #include <fcntl.h> | |
959e8b5d | 6 | #include <net/if.h> |
07630cea LP |
7 | #include <stddef.h> |
8 | #include <stdio.h> | |
9 | #include <stdlib.h> | |
07630cea | 10 | #include <unistd.h> |
d46f37fd | 11 | |
e81c3a4c YW |
12 | #include "sd-event.h" |
13 | ||
b5efdb8a | 14 | #include "alloc-util.h" |
947ce772 | 15 | #include "device-private.h" |
e9343893 | 16 | #include "device-util.h" |
3ffd4af2 | 17 | #include "fd-util.h" |
f97b34a6 | 18 | #include "format-util.h" |
70068602 | 19 | #include "libudev-device-internal.h" |
07630cea | 20 | #include "netlink-util.h" |
feaa6db7 | 21 | #include "path-util.h" |
8128f229 | 22 | #include "process-util.h" |
24882e06 | 23 | #include "signal-util.h" |
4cade7a1 | 24 | #include "stdio-util.h" |
07630cea | 25 | #include "string-util.h" |
07a26e42 | 26 | #include "udev-builtin.h" |
a2554ace | 27 | #include "udev-node.h" |
70068602 | 28 | #include "udev-watch.h" |
24882e06 | 29 | #include "udev.h" |
8128f229 TG |
30 | |
31 | typedef struct Spawn { | |
32 | const char *cmd; | |
33 | pid_t pid; | |
e81c3a4c YW |
34 | usec_t timeout_warn_usec; |
35 | usec_t timeout_usec; | |
36 | usec_t event_birth_usec; | |
53318514 | 37 | bool accept_failure; |
e81c3a4c YW |
38 | int fd_stdout; |
39 | int fd_stderr; | |
40 | char *result; | |
41 | size_t result_size; | |
42 | size_t result_len; | |
8128f229 | 43 | } Spawn; |
d46f37fd | 44 | |
e0bb2ff9 | 45 | struct udev_event *udev_event_new(struct udev_device *dev, int exec_delay, sd_netlink *rtnl) { |
912541b0 KS |
46 | struct udev_event *event; |
47 | ||
89665d09 YW |
48 | assert(dev); |
49 | ||
50 | event = new(struct udev_event, 1); | |
51 | if (!event) | |
912541b0 | 52 | return NULL; |
89665d09 YW |
53 | |
54 | *event = (struct udev_event) { | |
55 | .dev = dev, | |
56 | .birth_usec = now(CLOCK_MONOTONIC), | |
0f86dc90 | 57 | .exec_delay = exec_delay, |
e0bb2ff9 | 58 | .rtnl = sd_netlink_ref(rtnl), |
89665d09 YW |
59 | }; |
60 | ||
912541b0 | 61 | return event; |
aa8734ff KS |
62 | } |
63 | ||
c1118ceb | 64 | struct udev_event *udev_event_free(struct udev_event *event) { |
29448498 YW |
65 | void *p; |
66 | ||
c1118ceb YW |
67 | if (!event) |
68 | return NULL; | |
69 | ||
480ecb7d YW |
70 | udev_device_unref(event->dev); |
71 | sd_device_unref(event->dev_db_clone); | |
1c4baffc | 72 | sd_netlink_unref(event->rtnl); |
29448498 YW |
73 | while ((p = hashmap_steal_first_key(event->run_list))) |
74 | free(p); | |
d7371971 | 75 | hashmap_free(event->run_list); |
d838e145 | 76 | hashmap_free_free_free(event->seclabel_list); |
912541b0 KS |
77 | free(event->program_result); |
78 | free(event->name); | |
c1118ceb YW |
79 | |
80 | return mfree(event); | |
aa8734ff KS |
81 | } |
82 | ||
0d53705b | 83 | enum subst_type { |
0d53705b DS |
84 | SUBST_DEVNODE, |
85 | SUBST_ATTR, | |
86 | SUBST_ENV, | |
87 | SUBST_KERNEL, | |
88 | SUBST_KERNEL_NUMBER, | |
89 | SUBST_DRIVER, | |
90 | SUBST_DEVPATH, | |
91 | SUBST_ID, | |
92 | SUBST_MAJOR, | |
93 | SUBST_MINOR, | |
94 | SUBST_RESULT, | |
95 | SUBST_PARENT, | |
96 | SUBST_NAME, | |
97 | SUBST_LINKS, | |
98 | SUBST_ROOT, | |
99 | SUBST_SYS, | |
100 | }; | |
101 | ||
9204d802 YW |
102 | struct subst_map_entry { |
103 | const char *name; | |
104 | const char fmt; | |
105 | enum subst_type type; | |
106 | }; | |
107 | ||
108 | static const struct subst_map_entry map[] = { | |
109 | { .name = "devnode", .fmt = 'N', .type = SUBST_DEVNODE }, | |
110 | { .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE }, | |
111 | { .name = "attr", .fmt = 's', .type = SUBST_ATTR }, | |
112 | { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR }, | |
113 | { .name = "env", .fmt = 'E', .type = SUBST_ENV }, | |
114 | { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL }, | |
115 | { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER }, | |
116 | { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER }, | |
117 | { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH }, | |
118 | { .name = "id", .fmt = 'b', .type = SUBST_ID }, | |
119 | { .name = "major", .fmt = 'M', .type = SUBST_MAJOR }, | |
120 | { .name = "minor", .fmt = 'm', .type = SUBST_MINOR }, | |
121 | { .name = "result", .fmt = 'c', .type = SUBST_RESULT }, | |
122 | { .name = "parent", .fmt = 'P', .type = SUBST_PARENT }, | |
123 | { .name = "name", .fmt = 'D', .type = SUBST_NAME }, | |
124 | { .name = "links", .fmt = 'L', .type = SUBST_LINKS }, | |
125 | { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, | |
126 | { .name = "sys", .fmt = 'S', .type = SUBST_SYS }, | |
127 | }; | |
128 | ||
4cade7a1 YW |
129 | static ssize_t subst_format_var(struct udev_event *event, |
130 | const struct subst_map_entry *entry, char *attr, | |
131 | char *dest, size_t l) { | |
132 | sd_device *parent, *dev = event->dev->device; | |
133 | const char *val = NULL; | |
be452683 | 134 | char *s = dest; |
4cade7a1 YW |
135 | dev_t devnum; |
136 | int r; | |
0d53705b | 137 | |
9204d802 YW |
138 | assert(entry); |
139 | ||
140 | switch (entry->type) { | |
0d53705b | 141 | case SUBST_DEVPATH: |
4cade7a1 YW |
142 | r = sd_device_get_devpath(dev, &val); |
143 | if (r < 0) | |
144 | return r; | |
145 | l = strpcpy(&s, l, val); | |
0d53705b DS |
146 | break; |
147 | case SUBST_KERNEL: | |
4cade7a1 YW |
148 | r = sd_device_get_sysname(dev, &val); |
149 | if (r < 0) | |
150 | return r; | |
151 | l = strpcpy(&s, l, val); | |
0d53705b DS |
152 | break; |
153 | case SUBST_KERNEL_NUMBER: | |
4cade7a1 YW |
154 | r = sd_device_get_sysnum(dev, &val); |
155 | if (r < 0) | |
156 | return r == -ENOENT ? 0 : r; | |
157 | l = strpcpy(&s, l, val); | |
0d53705b DS |
158 | break; |
159 | case SUBST_ID: | |
4cade7a1 YW |
160 | if (!event->dev_parent) |
161 | return 0; | |
f3d241fe | 162 | r = sd_device_get_sysname(event->dev_parent, &val); |
4cade7a1 YW |
163 | if (r < 0) |
164 | return r; | |
165 | l = strpcpy(&s, l, val); | |
0d53705b | 166 | break; |
4cade7a1 YW |
167 | case SUBST_DRIVER: |
168 | if (!event->dev_parent) | |
169 | return 0; | |
f3d241fe | 170 | r = sd_device_get_driver(event->dev_parent, &val); |
4cade7a1 YW |
171 | if (r < 0) |
172 | return r == -ENOENT ? 0 : r; | |
173 | l = strpcpy(&s, l, val); | |
0d53705b | 174 | break; |
4cade7a1 | 175 | case SUBST_MAJOR: |
0d53705b | 176 | case SUBST_MINOR: { |
4cade7a1 | 177 | char buf[DECIMAL_STR_MAX(unsigned)]; |
0d53705b | 178 | |
4cade7a1 YW |
179 | r = sd_device_get_devnum(dev, &devnum); |
180 | if (r < 0 && r != -ENOENT) | |
181 | return r; | |
182 | xsprintf(buf, "%u", r < 0 ? 0 : entry->type == SUBST_MAJOR ? major(devnum) : minor(devnum)); | |
183 | l = strpcpy(&s, l, buf); | |
0d53705b DS |
184 | break; |
185 | } | |
186 | case SUBST_RESULT: { | |
187 | char *rest; | |
188 | int i; | |
189 | ||
4cade7a1 YW |
190 | if (!event->program_result) |
191 | return 0; | |
192 | ||
0d53705b DS |
193 | /* get part of the result string */ |
194 | i = 0; | |
4cade7a1 | 195 | if (attr) |
0d53705b DS |
196 | i = strtoul(attr, &rest, 10); |
197 | if (i > 0) { | |
4cade7a1 | 198 | char result[UTIL_PATH_SIZE], tmp[UTIL_PATH_SIZE], *cpos; |
0d53705b DS |
199 | |
200 | strscpy(result, sizeof(result), event->program_result); | |
201 | cpos = result; | |
202 | while (--i) { | |
203 | while (cpos[0] != '\0' && !isspace(cpos[0])) | |
204 | cpos++; | |
205 | while (isspace(cpos[0])) | |
206 | cpos++; | |
207 | if (cpos[0] == '\0') | |
208 | break; | |
209 | } | |
210 | if (i > 0) { | |
211 | log_error("requested part of result string not found"); | |
212 | break; | |
213 | } | |
214 | strscpy(tmp, sizeof(tmp), cpos); | |
215 | /* %{2+}c copies the whole string from the second part on */ | |
216 | if (rest[0] != '+') { | |
217 | cpos = strchr(tmp, ' '); | |
218 | if (cpos) | |
219 | cpos[0] = '\0'; | |
220 | } | |
221 | l = strpcpy(&s, l, tmp); | |
4cade7a1 | 222 | } else |
0d53705b | 223 | l = strpcpy(&s, l, event->program_result); |
0d53705b DS |
224 | break; |
225 | } | |
226 | case SUBST_ATTR: { | |
0d53705b DS |
227 | char vbuf[UTIL_NAME_SIZE]; |
228 | size_t len; | |
229 | int count; | |
230 | ||
4cade7a1 YW |
231 | if (!attr) |
232 | return -EINVAL; | |
0d53705b DS |
233 | |
234 | /* try to read the value specified by "[dmi/id]product_name" */ | |
755c3fe9 | 235 | if (util_resolve_subsys_kernel(attr, vbuf, sizeof(vbuf), 1) == 0) |
4cade7a1 | 236 | val = vbuf; |
0d53705b DS |
237 | |
238 | /* try to read the attribute the device */ | |
4cade7a1 YW |
239 | if (!val) |
240 | (void) sd_device_get_sysattr_value(dev, attr, &val); | |
0d53705b DS |
241 | |
242 | /* try to read the attribute of the parent device, other matches have selected */ | |
f3d241fe YW |
243 | if (!val && event->dev_parent && event->dev_parent != dev) |
244 | (void) sd_device_get_sysattr_value(event->dev_parent, attr, &val); | |
0d53705b | 245 | |
4cade7a1 YW |
246 | if (!val) |
247 | return 0; | |
0d53705b DS |
248 | |
249 | /* strip trailing whitespace, and replace unwanted characters */ | |
4cade7a1 YW |
250 | if (val != vbuf) |
251 | strscpy(vbuf, sizeof(vbuf), val); | |
0d53705b DS |
252 | len = strlen(vbuf); |
253 | while (len > 0 && isspace(vbuf[--len])) | |
254 | vbuf[len] = '\0'; | |
255 | count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); | |
256 | if (count > 0) | |
4cade7a1 | 257 | log_device_debug(dev, "%i character(s) replaced", count); |
0d53705b DS |
258 | l = strpcpy(&s, l, vbuf); |
259 | break; | |
260 | } | |
4cade7a1 YW |
261 | case SUBST_PARENT: |
262 | r = sd_device_get_parent(dev, &parent); | |
263 | if (r < 0) | |
264 | return r == -ENODEV ? 0 : r; | |
265 | r = sd_device_get_devname(parent, &val); | |
266 | if (r < 0) | |
267 | return r == -ENOENT ? 0 : r; | |
268 | l = strpcpy(&s, l, val + STRLEN("/dev/")); | |
0d53705b | 269 | break; |
0d53705b | 270 | case SUBST_DEVNODE: |
4cade7a1 YW |
271 | r = sd_device_get_devname(dev, &val); |
272 | if (r < 0) | |
273 | return r == -ENOENT ? 0 : r; | |
274 | l = strpcpy(&s, l, val); | |
0d53705b DS |
275 | break; |
276 | case SUBST_NAME: | |
4cade7a1 | 277 | if (event->name) |
0d53705b | 278 | l = strpcpy(&s, l, event->name); |
4cade7a1 YW |
279 | else if (sd_device_get_devname(dev, &val) >= 0) |
280 | l = strpcpy(&s, l, val + STRLEN("/dev/")); | |
281 | else { | |
282 | r = sd_device_get_sysname(dev, &val); | |
283 | if (r < 0) | |
284 | return r; | |
285 | l = strpcpy(&s, l, val); | |
286 | } | |
0d53705b | 287 | break; |
4cade7a1 YW |
288 | case SUBST_LINKS: |
289 | FOREACH_DEVICE_DEVLINK(dev, val) | |
290 | if (s == dest) | |
291 | l = strpcpy(&s, l, val + STRLEN("/dev/")); | |
292 | else | |
293 | l = strpcpyl(&s, l, " ", val + STRLEN("/dev/"), NULL); | |
0d53705b | 294 | break; |
0d53705b DS |
295 | case SUBST_ROOT: |
296 | l = strpcpy(&s, l, "/dev"); | |
297 | break; | |
298 | case SUBST_SYS: | |
299 | l = strpcpy(&s, l, "/sys"); | |
300 | break; | |
301 | case SUBST_ENV: | |
4cade7a1 YW |
302 | if (!attr) |
303 | return 0; | |
304 | r = sd_device_get_property_value(dev, attr, &val); | |
305 | if (r < 0) | |
306 | return r == -ENOENT ? 0 : r; | |
307 | l = strpcpy(&s, l, val); | |
308 | break; | |
0d53705b | 309 | default: |
9204d802 | 310 | assert_not_reached("Unknown format substitution type"); |
0d53705b DS |
311 | } |
312 | ||
be452683 | 313 | return s - dest; |
0d53705b DS |
314 | } |
315 | ||
4cade7a1 YW |
316 | ssize_t udev_event_apply_format(struct udev_event *event, |
317 | const char *src, char *dest, size_t size, | |
318 | bool replace_whitespace) { | |
912541b0 KS |
319 | const char *from; |
320 | char *s; | |
321 | size_t l; | |
322 | ||
a368732b YW |
323 | assert(event); |
324 | assert(event->dev); | |
325 | assert(src); | |
326 | assert(dest); | |
327 | assert(size > 0); | |
3b64e4d4 | 328 | |
912541b0 KS |
329 | from = src; |
330 | s = dest; | |
331 | l = size; | |
332 | ||
333 | for (;;) { | |
9204d802 | 334 | const struct subst_map_entry *entry = NULL; |
4cade7a1 YW |
335 | char attrbuf[UTIL_PATH_SIZE], *attr; |
336 | bool format_dollar = false; | |
337 | ssize_t subst_len; | |
912541b0 KS |
338 | |
339 | while (from[0] != '\0') { | |
340 | if (from[0] == '$') { | |
341 | /* substitute named variable */ | |
14cb109d | 342 | unsigned i; |
912541b0 KS |
343 | |
344 | if (from[1] == '$') { | |
345 | from++; | |
346 | goto copy; | |
347 | } | |
348 | ||
8fef0ff2 | 349 | for (i = 0; i < ELEMENTSOF(map); i++) { |
33502ffe | 350 | if (startswith(&from[1], map[i].name)) { |
9204d802 | 351 | entry = &map[i]; |
912541b0 | 352 | from += strlen(map[i].name)+1; |
4cade7a1 | 353 | format_dollar = true; |
912541b0 KS |
354 | goto subst; |
355 | } | |
356 | } | |
357 | } else if (from[0] == '%') { | |
358 | /* substitute format char */ | |
14cb109d | 359 | unsigned i; |
912541b0 KS |
360 | |
361 | if (from[1] == '%') { | |
362 | from++; | |
363 | goto copy; | |
364 | } | |
365 | ||
8fef0ff2 | 366 | for (i = 0; i < ELEMENTSOF(map); i++) { |
912541b0 | 367 | if (from[1] == map[i].fmt) { |
9204d802 | 368 | entry = &map[i]; |
912541b0 | 369 | from += 2; |
912541b0 KS |
370 | goto subst; |
371 | } | |
372 | } | |
373 | } | |
065db052 | 374 | copy: |
912541b0 | 375 | /* copy char */ |
79a695f2 | 376 | if (l < 2) /* need space for this char and the terminating NUL */ |
912541b0 KS |
377 | goto out; |
378 | s[0] = from[0]; | |
379 | from++; | |
380 | s++; | |
381 | l--; | |
382 | } | |
383 | ||
384 | goto out; | |
065db052 | 385 | subst: |
912541b0 KS |
386 | /* extract possible $format{attr} */ |
387 | if (from[0] == '{') { | |
14cb109d | 388 | unsigned i; |
912541b0 KS |
389 | |
390 | from++; | |
79a695f2 | 391 | for (i = 0; from[i] != '}'; i++) |
912541b0 | 392 | if (from[i] == '\0') { |
9f6445e3 | 393 | log_error("missing closing brace for format '%s'", src); |
912541b0 KS |
394 | goto out; |
395 | } | |
79a695f2 | 396 | |
912541b0 KS |
397 | if (i >= sizeof(attrbuf)) |
398 | goto out; | |
399 | memcpy(attrbuf, from, i); | |
400 | attrbuf[i] = '\0'; | |
401 | from += i+1; | |
402 | attr = attrbuf; | |
4cade7a1 | 403 | } else |
912541b0 | 404 | attr = NULL; |
912541b0 | 405 | |
9204d802 | 406 | subst_len = subst_format_var(event, entry, attr, s, l); |
4cade7a1 YW |
407 | if (subst_len < 0) { |
408 | if (format_dollar) | |
409 | log_device_warning_errno(event->dev->device, subst_len, "Failed to substitute variable '$%s', ignoring: %m", entry->name); | |
410 | else | |
411 | log_device_warning_errno(event->dev->device, subst_len, "Failed to apply format '%%%c', ignoring: %m", entry->fmt); | |
412 | ||
413 | continue; | |
414 | } | |
e20a9171 | 415 | |
be452683 | 416 | /* SUBST_RESULT handles spaces itself */ |
9204d802 | 417 | if (replace_whitespace && entry->type != SUBST_RESULT) |
be452683 DS |
418 | /* util_replace_whitespace can replace in-place, |
419 | * and does nothing if subst_len == 0 | |
420 | */ | |
421 | subst_len = util_replace_whitespace(s, s, subst_len); | |
e20a9171 | 422 | |
be452683 DS |
423 | s += subst_len; |
424 | l -= subst_len; | |
912541b0 | 425 | } |
065db052 KS |
426 | |
427 | out: | |
79a695f2 | 428 | assert(l >= 1); |
912541b0 | 429 | s[0] = '\0'; |
912541b0 | 430 | return l; |
f1128767 KS |
431 | } |
432 | ||
e81c3a4c YW |
433 | static int on_spawn_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
434 | Spawn *spawn = userdata; | |
435 | char buf[4096], *p; | |
436 | size_t size; | |
437 | ssize_t l; | |
912541b0 | 438 | |
e81c3a4c YW |
439 | assert(spawn); |
440 | assert(fd == spawn->fd_stdout || fd == spawn->fd_stderr); | |
441 | assert(!spawn->result || spawn->result_len < spawn->result_size); | |
442 | ||
443 | if (fd == spawn->fd_stdout && spawn->result) { | |
444 | p = spawn->result + spawn->result_len; | |
445 | size = spawn->result_size - spawn->result_len; | |
446 | } else { | |
447 | p = buf; | |
448 | size = sizeof(buf); | |
912541b0 KS |
449 | } |
450 | ||
e81c3a4c YW |
451 | l = read(fd, p, size - 1); |
452 | if (l < 0) { | |
453 | if (errno != EAGAIN) | |
454 | log_error_errno(errno, "Failed to read stdout of '%s': %m", spawn->cmd); | |
912541b0 | 455 | |
e81c3a4c | 456 | return 0; |
912541b0 KS |
457 | } |
458 | ||
e81c3a4c YW |
459 | p[l] = '\0'; |
460 | if (fd == spawn->fd_stdout && spawn->result) | |
461 | spawn->result_len += l; | |
912541b0 | 462 | |
e81c3a4c YW |
463 | /* Log output only if we watch stderr. */ |
464 | if (l > 0 && spawn->fd_stderr >= 0) { | |
465 | _cleanup_strv_free_ char **v = NULL; | |
466 | char **q; | |
912541b0 | 467 | |
e81c3a4c YW |
468 | v = strv_split_newlines(p); |
469 | if (!v) | |
470 | return 0; | |
912541b0 | 471 | |
e81c3a4c YW |
472 | STRV_FOREACH(q, v) |
473 | log_debug("'%s'(%s) '%s'", spawn->cmd, | |
474 | fd == spawn->fd_stdout ? "out" : "err", *q); | |
912541b0 KS |
475 | } |
476 | ||
e81c3a4c | 477 | return 0; |
2181d30a KS |
478 | } |
479 | ||
8128f229 TG |
480 | static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
481 | Spawn *spawn = userdata; | |
4375dab5 | 482 | char timeout[FORMAT_TIMESPAN_MAX]; |
912541b0 | 483 | |
8128f229 | 484 | assert(spawn); |
912541b0 | 485 | |
8128f229 | 486 | kill_and_sigcont(spawn->pid, SIGKILL); |
912541b0 | 487 | |
5ca3dbc9 | 488 | log_error("Spawned process '%s' ["PID_FMT"] timed out after %s, killing", spawn->cmd, spawn->pid, |
4375dab5 | 489 | format_timespan(timeout, sizeof(timeout), spawn->timeout_usec, USEC_PER_SEC)); |
912541b0 | 490 | |
8128f229 TG |
491 | return 1; |
492 | } | |
67117413 | 493 | |
8128f229 TG |
494 | static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { |
495 | Spawn *spawn = userdata; | |
4375dab5 | 496 | char timeout[FORMAT_TIMESPAN_MAX]; |
912541b0 | 497 | |
8128f229 | 498 | assert(spawn); |
67117413 | 499 | |
5ca3dbc9 | 500 | log_warning("Spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", spawn->cmd, spawn->pid, |
4375dab5 | 501 | format_timespan(timeout, sizeof(timeout), spawn->timeout_warn_usec, USEC_PER_SEC)); |
8128f229 TG |
502 | |
503 | return 1; | |
504 | } | |
505 | ||
506 | static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
507 | Spawn *spawn = userdata; | |
508 | ||
509 | assert(spawn); | |
510 | ||
511 | switch (si->si_code) { | |
512 | case CLD_EXITED: | |
53318514 TG |
513 | if (si->si_status == 0) { |
514 | log_debug("Process '%s' succeeded.", spawn->cmd); | |
8128f229 TG |
515 | sd_event_exit(sd_event_source_get_event(s), 0); |
516 | ||
517 | return 1; | |
4e57ad35 | 518 | } |
912541b0 | 519 | |
4e57ad35 YW |
520 | log_full(spawn->accept_failure ? LOG_DEBUG : LOG_WARNING, |
521 | "Process '%s' failed with exit code %i.", spawn->cmd, si->si_status); | |
8128f229 TG |
522 | break; |
523 | case CLD_KILLED: | |
524 | case CLD_DUMPED: | |
53318514 | 525 | log_warning("Process '%s' terminated by signal %s.", spawn->cmd, signal_to_string(si->si_status)); |
912541b0 | 526 | |
8128f229 TG |
527 | break; |
528 | default: | |
53318514 | 529 | log_error("Process '%s' failed due to unknown reason.", spawn->cmd); |
8128f229 | 530 | } |
912541b0 | 531 | |
8128f229 TG |
532 | sd_event_exit(sd_event_source_get_event(s), -EIO); |
533 | ||
534 | return 1; | |
535 | } | |
536 | ||
e81c3a4c | 537 | static int spawn_wait(Spawn *spawn) { |
4afd3348 | 538 | _cleanup_(sd_event_unrefp) sd_event *e = NULL; |
8128f229 TG |
539 | int r, ret; |
540 | ||
e81c3a4c YW |
541 | assert(spawn); |
542 | ||
8128f229 TG |
543 | r = sd_event_new(&e); |
544 | if (r < 0) | |
545 | return r; | |
546 | ||
e81c3a4c | 547 | if (spawn->timeout_usec > 0) { |
8128f229 TG |
548 | usec_t usec, age_usec; |
549 | ||
3285baa8 | 550 | usec = now(CLOCK_MONOTONIC); |
e81c3a4c YW |
551 | age_usec = usec - spawn->event_birth_usec; |
552 | if (age_usec < spawn->timeout_usec) { | |
553 | if (spawn->timeout_warn_usec > 0 && | |
554 | spawn->timeout_warn_usec < spawn->timeout_usec && | |
555 | spawn->timeout_warn_usec > age_usec) { | |
556 | spawn->timeout_warn_usec -= age_usec; | |
8128f229 | 557 | |
3285baa8 | 558 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c YW |
559 | usec + spawn->timeout_warn_usec, USEC_PER_SEC, |
560 | on_spawn_timeout_warning, spawn); | |
8128f229 TG |
561 | if (r < 0) |
562 | return r; | |
912541b0 | 563 | } |
8128f229 | 564 | |
e81c3a4c | 565 | spawn->timeout_usec -= age_usec; |
8128f229 | 566 | |
3285baa8 | 567 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c | 568 | usec + spawn->timeout_usec, USEC_PER_SEC, on_spawn_timeout, spawn); |
8128f229 TG |
569 | if (r < 0) |
570 | return r; | |
912541b0 KS |
571 | } |
572 | } | |
8128f229 | 573 | |
e81c3a4c YW |
574 | r = sd_event_add_io(e, NULL, spawn->fd_stdout, EPOLLIN, on_spawn_io, spawn); |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
578 | r = sd_event_add_io(e, NULL, spawn->fd_stderr, EPOLLIN, on_spawn_io, spawn); | |
579 | if (r < 0) | |
580 | return r; | |
581 | ||
582 | r = sd_event_add_child(e, NULL, spawn->pid, WEXITED, on_spawn_sigchld, spawn); | |
8128f229 TG |
583 | if (r < 0) |
584 | return r; | |
585 | ||
586 | r = sd_event_loop(e); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
590 | r = sd_event_get_exit_code(e, &ret); | |
591 | if (r < 0) | |
592 | return r; | |
593 | ||
594 | return ret; | |
2181d30a KS |
595 | } |
596 | ||
597 | int udev_event_spawn(struct udev_event *event, | |
dd5eddd2 | 598 | usec_t timeout_usec, |
67117413 | 599 | usec_t timeout_warn_usec, |
53318514 | 600 | bool accept_failure, |
bbf35206 | 601 | const char *cmd, |
dd5eddd2 | 602 | char *result, size_t ressize) { |
feaa6db7 YW |
603 | _cleanup_close_pair_ int outpipe[2] = {-1, -1}, errpipe[2] = {-1, -1}; |
604 | _cleanup_strv_free_ char **argv = NULL; | |
947ce772 | 605 | char **envp = NULL; |
e81c3a4c | 606 | Spawn spawn; |
912541b0 | 607 | pid_t pid; |
feaa6db7 | 608 | int r; |
912541b0 | 609 | |
dc8aec36 YW |
610 | assert(event); |
611 | assert(event->dev); | |
e81c3a4c YW |
612 | assert(result || ressize == 0); |
613 | ||
912541b0 | 614 | /* pipes from child to parent */ |
2e48548f | 615 | if (result || log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 616 | if (pipe2(outpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
feaa6db7 | 617 | return log_error_errno(errno, "Failed to create pipe for command '%s': %m", cmd); |
912541b0 | 618 | |
feaa6db7 | 619 | if (log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 620 | if (pipe2(errpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
feaa6db7 YW |
621 | return log_error_errno(errno, "Failed to create pipe for command '%s': %m", cmd); |
622 | ||
623 | argv = strv_split_full(cmd, NULL, SPLIT_QUOTES|SPLIT_RELAX); | |
624 | if (!argv) | |
625 | return log_oom(); | |
626 | ||
dc8aec36 YW |
627 | if (isempty(argv[0])) { |
628 | log_error("Invalid command '%s'", cmd); | |
629 | return -EINVAL; | |
630 | } | |
631 | ||
feaa6db7 YW |
632 | /* allow programs in /usr/lib/udev/ to be called without the path */ |
633 | if (!path_is_absolute(argv[0])) { | |
634 | char *program; | |
635 | ||
636 | program = path_join(NULL, UDEVLIBEXECDIR, argv[0]); | |
637 | if (!program) | |
638 | return log_oom(); | |
bbf35206 | 639 | |
feaa6db7 YW |
640 | free_and_replace(argv[0], program); |
641 | } | |
642 | ||
947ce772 YW |
643 | r = device_get_properties_strv(event->dev->device, &envp); |
644 | if (r < 0) | |
e9343893 | 645 | return log_device_error_errno(event->dev->device, r, "Failed to get device properties"); |
947ce772 | 646 | |
3ad4d482 YW |
647 | log_debug("Starting '%s'", cmd); |
648 | ||
6ce075a2 | 649 | r = safe_fork("(spawn)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); |
feaa6db7 YW |
650 | if (r < 0) |
651 | return log_error_errno(r, "Failed to fork() to execute command '%s': %m", cmd); | |
652 | if (r == 0) { | |
84b1ccb9 YW |
653 | if (rearrange_stdio(-1, outpipe[WRITE_END], errpipe[WRITE_END]) < 0) |
654 | _exit(EXIT_FAILURE); | |
912541b0 | 655 | |
84b1ccb9 | 656 | (void) close_all_fds(NULL, 0); |
912541b0 | 657 | |
947ce772 | 658 | execve(argv[0], argv, envp); |
84b1ccb9 | 659 | _exit(EXIT_FAILURE); |
bbf35206 | 660 | } |
912541b0 | 661 | |
4c253ed1 LP |
662 | /* parent closed child's ends of pipes */ |
663 | outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]); | |
664 | errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]); | |
912541b0 | 665 | |
e81c3a4c YW |
666 | spawn = (Spawn) { |
667 | .cmd = cmd, | |
668 | .pid = pid, | |
669 | .accept_failure = accept_failure, | |
670 | .timeout_warn_usec = timeout_warn_usec, | |
671 | .timeout_usec = timeout_usec, | |
672 | .event_birth_usec = event->birth_usec, | |
673 | .fd_stdout = outpipe[READ_END], | |
674 | .fd_stderr = errpipe[READ_END], | |
675 | .result = result, | |
676 | .result_size = ressize, | |
677 | }; | |
678 | r = spawn_wait(&spawn); | |
feaa6db7 YW |
679 | if (r < 0) |
680 | return log_error_errno(r, "Failed to wait spawned command '%s': %m", cmd); | |
2181d30a | 681 | |
e81c3a4c YW |
682 | if (result) |
683 | result[spawn.result_len] = '\0'; | |
684 | ||
feaa6db7 | 685 | return r; |
2181d30a KS |
686 | } |
687 | ||
9ec6e95b | 688 | static int rename_netif(struct udev_event *event) { |
2740750d YW |
689 | sd_device *dev = event->dev->device; |
690 | const char *action, *oldname; | |
16d26d55 | 691 | char name[IFNAMSIZ]; |
2740750d YW |
692 | int ifindex, r; |
693 | ||
694 | if (!event->name) | |
695 | return 0; /* No new name is requested. */ | |
696 | ||
697 | r = sd_device_get_sysname(dev, &oldname); | |
698 | if (r < 0) | |
699 | return log_device_error_errno(dev, r, "Failed to get sysname: %m"); | |
700 | ||
701 | if (streq(event->name, oldname)) | |
702 | return 0; /* The interface name is already requested name. */ | |
703 | ||
704 | r = sd_device_get_property_value(dev, "ACTION", &action); | |
705 | if (r < 0) | |
706 | return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m"); | |
707 | ||
708 | if (!streq(action, "add")) | |
709 | return 0; /* Rename the interface only when it is added. */ | |
16d26d55 | 710 | |
2740750d YW |
711 | r = sd_device_get_ifindex(dev, &ifindex); |
712 | if (r == -ENOENT) | |
713 | return 0; /* Device is not a network interface. */ | |
714 | if (r < 0) | |
715 | return log_device_error_errno(dev, r, "Failed to get ifindex: %m"); | |
912541b0 | 716 | |
16d26d55 | 717 | strscpy(name, IFNAMSIZ, event->name); |
2740750d YW |
718 | r = rtnl_set_link_name(&event->rtnl, ifindex, name); |
719 | if (r < 0) | |
720 | return log_device_error_errno(dev, r, "Failed to rename network interface %i from '%s' to '%s': %m", ifindex, oldname, name); | |
912541b0 | 721 | |
2740750d | 722 | r = device_rename(dev, event->name); |
f647962d | 723 | if (r < 0) |
2740750d | 724 | return log_warning_errno(r, "Network interface %i is renamed from '%s' to '%s', but could not update sd_device object: %m", ifindex, oldname, name); |
16d26d55 | 725 | |
2740750d | 726 | log_device_debug(dev, "Network interface %i is renamed from '%s' to '%s'", ifindex, oldname, name); |
16d26d55 | 727 | |
2740750d | 728 | return 1; |
d46f37fd KS |
729 | } |
730 | ||
e52eaf56 YW |
731 | static int update_devnode(struct udev_event *event) { |
732 | sd_device *dev = event->dev->device; | |
733 | const char *action; | |
e52eaf56 YW |
734 | bool apply; |
735 | int r; | |
736 | ||
7af1c780 | 737 | r = sd_device_get_devnum(dev, NULL); |
e52eaf56 YW |
738 | if (r == -ENOENT) |
739 | return 0; | |
740 | if (r < 0) | |
741 | return log_device_error_errno(dev, r, "Failed to get devnum: %m"); | |
742 | ||
743 | /* remove/update possible left-over symlinks from old database entry */ | |
480ecb7d YW |
744 | if (event->dev_db_clone) |
745 | (void) udev_node_update_old_links(dev, event->dev_db_clone); | |
e52eaf56 YW |
746 | |
747 | if (!event->owner_set) { | |
748 | r = device_get_devnode_uid(dev, &event->uid); | |
749 | if (r < 0 && r != -ENOENT) | |
750 | return log_device_error_errno(dev, r, "Failed to get devnode UID: %m"); | |
751 | } | |
752 | ||
753 | if (!event->group_set) { | |
754 | r = device_get_devnode_gid(dev, &event->gid); | |
755 | if (r < 0 && r != -ENOENT) | |
756 | return log_device_error_errno(dev, r, "Failed to get devnode GID: %m"); | |
757 | } | |
758 | ||
759 | if (!event->mode_set) { | |
760 | r = device_get_devnode_mode(dev, &event->mode); | |
761 | if (r < 0 && r != -ENOENT) | |
762 | return log_device_error_errno(dev, r, "Failed to get devnode mode: %m"); | |
763 | if (r == -ENOENT) { | |
764 | if (event->gid > 0) | |
765 | /* default 0660 if a group is assigned */ | |
766 | event->mode = 0660; | |
767 | else | |
768 | /* default 0600 */ | |
769 | event->mode = 0600; | |
770 | } | |
771 | } | |
772 | ||
773 | r = sd_device_get_property_value(dev, "ACTION", &action); | |
774 | if (r < 0) | |
775 | return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m"); | |
776 | ||
777 | apply = streq(action, "add") || event->owner_set || event->group_set || event->mode_set; | |
778 | return udev_node_add(dev, apply, event->mode, event->uid, event->gid, event->seclabel_list); | |
779 | } | |
780 | ||
eb1f9e30 YW |
781 | static void event_execute_rules_on_remove( |
782 | struct udev_event *event, | |
783 | usec_t timeout_usec, usec_t timeout_warn_usec, | |
784 | Hashmap *properties_list, | |
785 | struct udev_rules *rules) { | |
912541b0 | 786 | |
eb1f9e30 | 787 | sd_device *dev = event->dev->device; |
eb1f9e30 | 788 | int r; |
912541b0 | 789 | |
eb1f9e30 YW |
790 | r = device_read_db_force(dev); |
791 | if (r < 0) | |
792 | log_device_debug_errno(dev, r, "Failed to read database under /run/udev/data/: %m"); | |
107f2e25 | 793 | |
eb1f9e30 YW |
794 | r = device_tag_index(dev, NULL, false); |
795 | if (r < 0) | |
796 | log_device_debug_errno(dev, r, "Failed to remove corresponding tag files under /run/udev/tag/, ignoring: %m"); | |
912541b0 | 797 | |
eb1f9e30 YW |
798 | r = device_delete_db(dev); |
799 | if (r < 0) | |
800 | log_device_debug_errno(dev, r, "Failed to delete database under /run/udev/data/, ignoring: %m"); | |
912541b0 | 801 | |
d4a95a95 | 802 | if (sd_device_get_devnum(dev, NULL) >= 0) |
eb1f9e30 YW |
803 | (void) udev_watch_end(dev); |
804 | ||
805 | (void) udev_rules_apply_to_event(rules, event, | |
806 | timeout_usec, timeout_warn_usec, | |
807 | properties_list); | |
808 | ||
d4a95a95 | 809 | if (sd_device_get_devnum(dev, NULL) >= 0) |
eb1f9e30 YW |
810 | (void) udev_node_remove(dev); |
811 | } | |
812 | ||
813 | int udev_event_execute_rules(struct udev_event *event, | |
814 | usec_t timeout_usec, usec_t timeout_warn_usec, | |
815 | Hashmap *properties_list, | |
816 | struct udev_rules *rules) { | |
eb1f9e30 YW |
817 | sd_device *dev = event->dev->device; |
818 | const char *subsystem, *action; | |
eb1f9e30 YW |
819 | int r; |
820 | ||
821 | assert(event); | |
822 | assert(rules); | |
823 | ||
824 | r = sd_device_get_subsystem(dev, &subsystem); | |
825 | if (r < 0) | |
826 | return log_device_error_errno(dev, r, "Failed to get subsystem: %m"); | |
827 | ||
828 | r = sd_device_get_property_value(dev, "ACTION", &action); | |
829 | if (r < 0) | |
830 | return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m"); | |
b081b27e | 831 | |
eb1f9e30 YW |
832 | if (streq(action, "remove")) { |
833 | event_execute_rules_on_remove(event, timeout_usec, timeout_warn_usec, properties_list, rules); | |
834 | return 0; | |
835 | } | |
912541b0 | 836 | |
480ecb7d | 837 | r = device_clone_with_db(dev, &event->dev_db_clone); |
eb1f9e30 YW |
838 | if (r < 0) |
839 | log_device_debug_errno(dev, r, "Failed to clone sd_device object, ignoring: %m"); | |
912541b0 | 840 | |
480ecb7d | 841 | if (event->dev_db_clone) { |
7af1c780 | 842 | r = sd_device_get_devnum(dev, NULL); |
eb1f9e30 YW |
843 | if (r < 0) { |
844 | if (r != -ENOENT) | |
845 | log_device_debug_errno(dev, r, "Failed to get devnum, ignoring: %m"); | |
912541b0 | 846 | |
eb1f9e30 | 847 | if (streq(action, "move")) { |
480ecb7d | 848 | r = device_copy_properties(dev, event->dev_db_clone); |
eb1f9e30 YW |
849 | if (r < 0) |
850 | log_device_debug_errno(dev, r, "Failed to copy properties from cloned device, ignoring: %m"); | |
851 | } | |
852 | } else | |
853 | /* Disable watch during event processing. */ | |
480ecb7d | 854 | (void) udev_watch_end(event->dev_db_clone); |
912541b0 | 855 | } |
eb1f9e30 YW |
856 | |
857 | (void) udev_rules_apply_to_event(rules, event, | |
858 | timeout_usec, timeout_warn_usec, | |
859 | properties_list); | |
860 | ||
861 | (void) rename_netif(event); | |
862 | (void) update_devnode(event); | |
863 | ||
864 | /* preserve old, or get new initialization timestamp */ | |
480ecb7d | 865 | r = device_ensure_usec_initialized(dev, event->dev_db_clone); |
eb1f9e30 YW |
866 | if (r < 0) |
867 | log_device_debug_errno(dev, r, "Failed to set initialization timestamp, ignoring: %m"); | |
868 | ||
869 | /* (re)write database file */ | |
480ecb7d | 870 | r = device_tag_index(dev, event->dev_db_clone, true); |
eb1f9e30 YW |
871 | if (r < 0) |
872 | log_device_debug_errno(dev, r, "Failed to update tags under /run/udev/tag/, ignoring: %m"); | |
873 | ||
874 | r = device_update_db(dev); | |
875 | if (r < 0) | |
876 | log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/, ignoring: %m"); | |
877 | ||
878 | device_set_is_initialized(dev); | |
879 | ||
480ecb7d | 880 | event->dev_db_clone = sd_device_unref(event->dev_db_clone); |
eb1f9e30 YW |
881 | |
882 | return 0; | |
d46f37fd | 883 | } |
2d73813e | 884 | |
8314de1d | 885 | void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, usec_t timeout_warn_usec) { |
29448498 YW |
886 | const char *cmd; |
887 | void *val; | |
888 | Iterator i; | |
912541b0 | 889 | |
29448498 YW |
890 | HASHMAP_FOREACH_KEY(val, cmd, event->run_list, i) { |
891 | enum udev_builtin_cmd builtin_cmd = PTR_TO_INT(val); | |
bbf35206 | 892 | char command[UTIL_PATH_SIZE]; |
83cd6b75 | 893 | |
e20a9171 | 894 | udev_event_apply_format(event, cmd, command, sizeof(command), false); |
912541b0 | 895 | |
c45b369d | 896 | if (builtin_cmd >= 0 && builtin_cmd < _UDEV_BUILTIN_MAX) |
3d6194e8 | 897 | udev_builtin_run(event->dev->device, builtin_cmd, command, false); |
bbf35206 | 898 | else { |
912541b0 | 899 | if (event->exec_delay > 0) { |
bbf35206 | 900 | log_debug("delay execution of '%s'", command); |
912541b0 KS |
901 | sleep(event->exec_delay); |
902 | } | |
903 | ||
bbf35206 | 904 | udev_event_spawn(event, timeout_usec, timeout_warn_usec, false, command, NULL, 0); |
912541b0 KS |
905 | } |
906 | } | |
2d73813e | 907 | } |