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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" |
5ea78a39 | 19 | #include "libudev-util.h" |
07630cea | 20 | #include "netlink-util.h" |
feaa6db7 | 21 | #include "path-util.h" |
8128f229 | 22 | #include "process-util.h" |
595225af | 23 | #include "rlimit-util.h" |
24882e06 | 24 | #include "signal-util.h" |
4cade7a1 | 25 | #include "stdio-util.h" |
07630cea | 26 | #include "string-util.h" |
5ea78a39 YW |
27 | #include "strv.h" |
28 | #include "strxcpyx.h" | |
07a26e42 | 29 | #include "udev-builtin.h" |
a2554ace | 30 | #include "udev-node.h" |
70068602 | 31 | #include "udev-watch.h" |
24882e06 | 32 | #include "udev.h" |
8128f229 TG |
33 | |
34 | typedef struct Spawn { | |
35 | const char *cmd; | |
36 | pid_t pid; | |
e81c3a4c YW |
37 | usec_t timeout_warn_usec; |
38 | usec_t timeout_usec; | |
39 | usec_t event_birth_usec; | |
53318514 | 40 | bool accept_failure; |
e81c3a4c YW |
41 | int fd_stdout; |
42 | int fd_stderr; | |
43 | char *result; | |
44 | size_t result_size; | |
45 | size_t result_len; | |
8128f229 | 46 | } Spawn; |
d46f37fd | 47 | |
6b92f429 | 48 | struct udev_event *udev_event_new(sd_device *dev, usec_t exec_delay_usec, sd_netlink *rtnl) { |
912541b0 KS |
49 | struct udev_event *event; |
50 | ||
89665d09 YW |
51 | assert(dev); |
52 | ||
53 | event = new(struct udev_event, 1); | |
54 | if (!event) | |
912541b0 | 55 | return NULL; |
89665d09 YW |
56 | |
57 | *event = (struct udev_event) { | |
cf28ad46 | 58 | .dev = sd_device_ref(dev), |
89665d09 | 59 | .birth_usec = now(CLOCK_MONOTONIC), |
6b92f429 | 60 | .exec_delay_usec = exec_delay_usec, |
e0bb2ff9 | 61 | .rtnl = sd_netlink_ref(rtnl), |
89665d09 YW |
62 | }; |
63 | ||
912541b0 | 64 | return event; |
aa8734ff KS |
65 | } |
66 | ||
c1118ceb | 67 | struct udev_event *udev_event_free(struct udev_event *event) { |
29448498 YW |
68 | void *p; |
69 | ||
c1118ceb YW |
70 | if (!event) |
71 | return NULL; | |
72 | ||
cf28ad46 | 73 | sd_device_unref(event->dev); |
480ecb7d | 74 | sd_device_unref(event->dev_db_clone); |
1c4baffc | 75 | sd_netlink_unref(event->rtnl); |
29448498 YW |
76 | while ((p = hashmap_steal_first_key(event->run_list))) |
77 | free(p); | |
d7371971 | 78 | hashmap_free(event->run_list); |
d838e145 | 79 | hashmap_free_free_free(event->seclabel_list); |
912541b0 KS |
80 | free(event->program_result); |
81 | free(event->name); | |
c1118ceb YW |
82 | |
83 | return mfree(event); | |
aa8734ff KS |
84 | } |
85 | ||
0d53705b | 86 | enum subst_type { |
0d53705b DS |
87 | SUBST_DEVNODE, |
88 | SUBST_ATTR, | |
89 | SUBST_ENV, | |
90 | SUBST_KERNEL, | |
91 | SUBST_KERNEL_NUMBER, | |
92 | SUBST_DRIVER, | |
93 | SUBST_DEVPATH, | |
94 | SUBST_ID, | |
95 | SUBST_MAJOR, | |
96 | SUBST_MINOR, | |
97 | SUBST_RESULT, | |
98 | SUBST_PARENT, | |
99 | SUBST_NAME, | |
100 | SUBST_LINKS, | |
101 | SUBST_ROOT, | |
102 | SUBST_SYS, | |
103 | }; | |
104 | ||
9204d802 YW |
105 | struct subst_map_entry { |
106 | const char *name; | |
107 | const char fmt; | |
108 | enum subst_type type; | |
109 | }; | |
110 | ||
111 | static const struct subst_map_entry map[] = { | |
112 | { .name = "devnode", .fmt = 'N', .type = SUBST_DEVNODE }, | |
113 | { .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE }, | |
114 | { .name = "attr", .fmt = 's', .type = SUBST_ATTR }, | |
115 | { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR }, | |
116 | { .name = "env", .fmt = 'E', .type = SUBST_ENV }, | |
117 | { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL }, | |
118 | { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER }, | |
119 | { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER }, | |
120 | { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH }, | |
121 | { .name = "id", .fmt = 'b', .type = SUBST_ID }, | |
122 | { .name = "major", .fmt = 'M', .type = SUBST_MAJOR }, | |
123 | { .name = "minor", .fmt = 'm', .type = SUBST_MINOR }, | |
124 | { .name = "result", .fmt = 'c', .type = SUBST_RESULT }, | |
125 | { .name = "parent", .fmt = 'P', .type = SUBST_PARENT }, | |
126 | { .name = "name", .fmt = 'D', .type = SUBST_NAME }, | |
127 | { .name = "links", .fmt = 'L', .type = SUBST_LINKS }, | |
128 | { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, | |
129 | { .name = "sys", .fmt = 'S', .type = SUBST_SYS }, | |
130 | }; | |
131 | ||
4cade7a1 YW |
132 | static ssize_t subst_format_var(struct udev_event *event, |
133 | const struct subst_map_entry *entry, char *attr, | |
134 | char *dest, size_t l) { | |
cf28ad46 | 135 | sd_device *parent, *dev = event->dev; |
4cade7a1 | 136 | const char *val = NULL; |
be452683 | 137 | char *s = dest; |
4cade7a1 YW |
138 | dev_t devnum; |
139 | int r; | |
0d53705b | 140 | |
9204d802 YW |
141 | assert(entry); |
142 | ||
143 | switch (entry->type) { | |
0d53705b | 144 | case SUBST_DEVPATH: |
4cade7a1 YW |
145 | r = sd_device_get_devpath(dev, &val); |
146 | if (r < 0) | |
147 | return r; | |
148 | l = strpcpy(&s, l, val); | |
0d53705b DS |
149 | break; |
150 | case SUBST_KERNEL: | |
4cade7a1 YW |
151 | r = sd_device_get_sysname(dev, &val); |
152 | if (r < 0) | |
153 | return r; | |
154 | l = strpcpy(&s, l, val); | |
0d53705b DS |
155 | break; |
156 | case SUBST_KERNEL_NUMBER: | |
4cade7a1 YW |
157 | r = sd_device_get_sysnum(dev, &val); |
158 | if (r < 0) | |
159 | return r == -ENOENT ? 0 : r; | |
160 | l = strpcpy(&s, l, val); | |
0d53705b DS |
161 | break; |
162 | case SUBST_ID: | |
4cade7a1 YW |
163 | if (!event->dev_parent) |
164 | return 0; | |
f3d241fe | 165 | r = sd_device_get_sysname(event->dev_parent, &val); |
4cade7a1 YW |
166 | if (r < 0) |
167 | return r; | |
168 | l = strpcpy(&s, l, val); | |
0d53705b | 169 | break; |
4cade7a1 YW |
170 | case SUBST_DRIVER: |
171 | if (!event->dev_parent) | |
172 | return 0; | |
f3d241fe | 173 | r = sd_device_get_driver(event->dev_parent, &val); |
4cade7a1 YW |
174 | if (r < 0) |
175 | return r == -ENOENT ? 0 : r; | |
176 | l = strpcpy(&s, l, val); | |
0d53705b | 177 | break; |
4cade7a1 | 178 | case SUBST_MAJOR: |
0d53705b | 179 | case SUBST_MINOR: { |
4cade7a1 | 180 | char buf[DECIMAL_STR_MAX(unsigned)]; |
0d53705b | 181 | |
4cade7a1 YW |
182 | r = sd_device_get_devnum(dev, &devnum); |
183 | if (r < 0 && r != -ENOENT) | |
184 | return r; | |
185 | xsprintf(buf, "%u", r < 0 ? 0 : entry->type == SUBST_MAJOR ? major(devnum) : minor(devnum)); | |
186 | l = strpcpy(&s, l, buf); | |
0d53705b DS |
187 | break; |
188 | } | |
189 | case SUBST_RESULT: { | |
190 | char *rest; | |
191 | int i; | |
192 | ||
4cade7a1 YW |
193 | if (!event->program_result) |
194 | return 0; | |
195 | ||
0d53705b DS |
196 | /* get part of the result string */ |
197 | i = 0; | |
4cade7a1 | 198 | if (attr) |
0d53705b DS |
199 | i = strtoul(attr, &rest, 10); |
200 | if (i > 0) { | |
4cade7a1 | 201 | char result[UTIL_PATH_SIZE], tmp[UTIL_PATH_SIZE], *cpos; |
0d53705b DS |
202 | |
203 | strscpy(result, sizeof(result), event->program_result); | |
204 | cpos = result; | |
205 | while (--i) { | |
206 | while (cpos[0] != '\0' && !isspace(cpos[0])) | |
207 | cpos++; | |
208 | while (isspace(cpos[0])) | |
209 | cpos++; | |
210 | if (cpos[0] == '\0') | |
211 | break; | |
212 | } | |
213 | if (i > 0) { | |
214 | log_error("requested part of result string not found"); | |
215 | break; | |
216 | } | |
217 | strscpy(tmp, sizeof(tmp), cpos); | |
218 | /* %{2+}c copies the whole string from the second part on */ | |
219 | if (rest[0] != '+') { | |
220 | cpos = strchr(tmp, ' '); | |
221 | if (cpos) | |
222 | cpos[0] = '\0'; | |
223 | } | |
224 | l = strpcpy(&s, l, tmp); | |
4cade7a1 | 225 | } else |
0d53705b | 226 | l = strpcpy(&s, l, event->program_result); |
0d53705b DS |
227 | break; |
228 | } | |
229 | case SUBST_ATTR: { | |
0d53705b DS |
230 | char vbuf[UTIL_NAME_SIZE]; |
231 | size_t len; | |
232 | int count; | |
233 | ||
4cade7a1 YW |
234 | if (!attr) |
235 | return -EINVAL; | |
0d53705b DS |
236 | |
237 | /* try to read the value specified by "[dmi/id]product_name" */ | |
3839535a | 238 | if (util_resolve_subsys_kernel(attr, vbuf, sizeof(vbuf), true) == 0) |
4cade7a1 | 239 | val = vbuf; |
0d53705b DS |
240 | |
241 | /* try to read the attribute the device */ | |
4cade7a1 YW |
242 | if (!val) |
243 | (void) sd_device_get_sysattr_value(dev, attr, &val); | |
0d53705b DS |
244 | |
245 | /* try to read the attribute of the parent device, other matches have selected */ | |
f3d241fe YW |
246 | if (!val && event->dev_parent && event->dev_parent != dev) |
247 | (void) sd_device_get_sysattr_value(event->dev_parent, attr, &val); | |
0d53705b | 248 | |
4cade7a1 YW |
249 | if (!val) |
250 | return 0; | |
0d53705b DS |
251 | |
252 | /* strip trailing whitespace, and replace unwanted characters */ | |
4cade7a1 YW |
253 | if (val != vbuf) |
254 | strscpy(vbuf, sizeof(vbuf), val); | |
0d53705b DS |
255 | len = strlen(vbuf); |
256 | while (len > 0 && isspace(vbuf[--len])) | |
257 | vbuf[len] = '\0'; | |
258 | count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); | |
259 | if (count > 0) | |
4cade7a1 | 260 | log_device_debug(dev, "%i character(s) replaced", count); |
0d53705b DS |
261 | l = strpcpy(&s, l, vbuf); |
262 | break; | |
263 | } | |
4cade7a1 YW |
264 | case SUBST_PARENT: |
265 | r = sd_device_get_parent(dev, &parent); | |
266 | if (r < 0) | |
267 | return r == -ENODEV ? 0 : r; | |
268 | r = sd_device_get_devname(parent, &val); | |
269 | if (r < 0) | |
270 | return r == -ENOENT ? 0 : r; | |
271 | l = strpcpy(&s, l, val + STRLEN("/dev/")); | |
0d53705b | 272 | break; |
0d53705b | 273 | case SUBST_DEVNODE: |
4cade7a1 YW |
274 | r = sd_device_get_devname(dev, &val); |
275 | if (r < 0) | |
276 | return r == -ENOENT ? 0 : r; | |
277 | l = strpcpy(&s, l, val); | |
0d53705b DS |
278 | break; |
279 | case SUBST_NAME: | |
4cade7a1 | 280 | if (event->name) |
0d53705b | 281 | l = strpcpy(&s, l, event->name); |
4cade7a1 YW |
282 | else if (sd_device_get_devname(dev, &val) >= 0) |
283 | l = strpcpy(&s, l, val + STRLEN("/dev/")); | |
284 | else { | |
285 | r = sd_device_get_sysname(dev, &val); | |
286 | if (r < 0) | |
287 | return r; | |
288 | l = strpcpy(&s, l, val); | |
289 | } | |
0d53705b | 290 | break; |
4cade7a1 YW |
291 | case SUBST_LINKS: |
292 | FOREACH_DEVICE_DEVLINK(dev, val) | |
293 | if (s == dest) | |
294 | l = strpcpy(&s, l, val + STRLEN("/dev/")); | |
295 | else | |
296 | l = strpcpyl(&s, l, " ", val + STRLEN("/dev/"), NULL); | |
0d53705b | 297 | break; |
0d53705b DS |
298 | case SUBST_ROOT: |
299 | l = strpcpy(&s, l, "/dev"); | |
300 | break; | |
301 | case SUBST_SYS: | |
302 | l = strpcpy(&s, l, "/sys"); | |
303 | break; | |
304 | case SUBST_ENV: | |
4cade7a1 YW |
305 | if (!attr) |
306 | return 0; | |
307 | r = sd_device_get_property_value(dev, attr, &val); | |
308 | if (r < 0) | |
309 | return r == -ENOENT ? 0 : r; | |
310 | l = strpcpy(&s, l, val); | |
311 | break; | |
0d53705b | 312 | default: |
9204d802 | 313 | assert_not_reached("Unknown format substitution type"); |
0d53705b DS |
314 | } |
315 | ||
be452683 | 316 | return s - dest; |
0d53705b DS |
317 | } |
318 | ||
4cade7a1 YW |
319 | ssize_t udev_event_apply_format(struct udev_event *event, |
320 | const char *src, char *dest, size_t size, | |
321 | bool replace_whitespace) { | |
912541b0 KS |
322 | const char *from; |
323 | char *s; | |
324 | size_t l; | |
325 | ||
a368732b YW |
326 | assert(event); |
327 | assert(event->dev); | |
328 | assert(src); | |
329 | assert(dest); | |
330 | assert(size > 0); | |
3b64e4d4 | 331 | |
912541b0 KS |
332 | from = src; |
333 | s = dest; | |
334 | l = size; | |
335 | ||
336 | for (;;) { | |
9204d802 | 337 | const struct subst_map_entry *entry = NULL; |
4cade7a1 YW |
338 | char attrbuf[UTIL_PATH_SIZE], *attr; |
339 | bool format_dollar = false; | |
340 | ssize_t subst_len; | |
912541b0 KS |
341 | |
342 | while (from[0] != '\0') { | |
343 | if (from[0] == '$') { | |
344 | /* substitute named variable */ | |
14cb109d | 345 | unsigned i; |
912541b0 KS |
346 | |
347 | if (from[1] == '$') { | |
348 | from++; | |
349 | goto copy; | |
350 | } | |
351 | ||
8fef0ff2 | 352 | for (i = 0; i < ELEMENTSOF(map); i++) { |
33502ffe | 353 | if (startswith(&from[1], map[i].name)) { |
9204d802 | 354 | entry = &map[i]; |
912541b0 | 355 | from += strlen(map[i].name)+1; |
4cade7a1 | 356 | format_dollar = true; |
912541b0 KS |
357 | goto subst; |
358 | } | |
359 | } | |
360 | } else if (from[0] == '%') { | |
361 | /* substitute format char */ | |
14cb109d | 362 | unsigned i; |
912541b0 KS |
363 | |
364 | if (from[1] == '%') { | |
365 | from++; | |
366 | goto copy; | |
367 | } | |
368 | ||
8fef0ff2 | 369 | for (i = 0; i < ELEMENTSOF(map); i++) { |
912541b0 | 370 | if (from[1] == map[i].fmt) { |
9204d802 | 371 | entry = &map[i]; |
912541b0 | 372 | from += 2; |
912541b0 KS |
373 | goto subst; |
374 | } | |
375 | } | |
376 | } | |
065db052 | 377 | copy: |
912541b0 | 378 | /* copy char */ |
79a695f2 | 379 | if (l < 2) /* need space for this char and the terminating NUL */ |
912541b0 KS |
380 | goto out; |
381 | s[0] = from[0]; | |
382 | from++; | |
383 | s++; | |
384 | l--; | |
385 | } | |
386 | ||
387 | goto out; | |
065db052 | 388 | subst: |
912541b0 KS |
389 | /* extract possible $format{attr} */ |
390 | if (from[0] == '{') { | |
14cb109d | 391 | unsigned i; |
912541b0 KS |
392 | |
393 | from++; | |
79a695f2 | 394 | for (i = 0; from[i] != '}'; i++) |
912541b0 | 395 | if (from[i] == '\0') { |
9f6445e3 | 396 | log_error("missing closing brace for format '%s'", src); |
912541b0 KS |
397 | goto out; |
398 | } | |
79a695f2 | 399 | |
912541b0 KS |
400 | if (i >= sizeof(attrbuf)) |
401 | goto out; | |
402 | memcpy(attrbuf, from, i); | |
403 | attrbuf[i] = '\0'; | |
404 | from += i+1; | |
405 | attr = attrbuf; | |
4cade7a1 | 406 | } else |
912541b0 | 407 | attr = NULL; |
912541b0 | 408 | |
9204d802 | 409 | subst_len = subst_format_var(event, entry, attr, s, l); |
4cade7a1 YW |
410 | if (subst_len < 0) { |
411 | if (format_dollar) | |
cf28ad46 | 412 | log_device_warning_errno(event->dev, subst_len, "Failed to substitute variable '$%s', ignoring: %m", entry->name); |
4cade7a1 | 413 | else |
cf28ad46 | 414 | log_device_warning_errno(event->dev, subst_len, "Failed to apply format '%%%c', ignoring: %m", entry->fmt); |
4cade7a1 YW |
415 | |
416 | continue; | |
417 | } | |
e20a9171 | 418 | |
be452683 | 419 | /* SUBST_RESULT handles spaces itself */ |
9204d802 | 420 | if (replace_whitespace && entry->type != SUBST_RESULT) |
be452683 DS |
421 | /* util_replace_whitespace can replace in-place, |
422 | * and does nothing if subst_len == 0 | |
423 | */ | |
424 | subst_len = util_replace_whitespace(s, s, subst_len); | |
e20a9171 | 425 | |
be452683 DS |
426 | s += subst_len; |
427 | l -= subst_len; | |
912541b0 | 428 | } |
065db052 KS |
429 | |
430 | out: | |
79a695f2 | 431 | assert(l >= 1); |
912541b0 | 432 | s[0] = '\0'; |
912541b0 | 433 | return l; |
f1128767 KS |
434 | } |
435 | ||
e81c3a4c YW |
436 | static int on_spawn_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
437 | Spawn *spawn = userdata; | |
438 | char buf[4096], *p; | |
439 | size_t size; | |
440 | ssize_t l; | |
912541b0 | 441 | |
e81c3a4c YW |
442 | assert(spawn); |
443 | assert(fd == spawn->fd_stdout || fd == spawn->fd_stderr); | |
444 | assert(!spawn->result || spawn->result_len < spawn->result_size); | |
445 | ||
446 | if (fd == spawn->fd_stdout && spawn->result) { | |
447 | p = spawn->result + spawn->result_len; | |
448 | size = spawn->result_size - spawn->result_len; | |
449 | } else { | |
450 | p = buf; | |
451 | size = sizeof(buf); | |
912541b0 KS |
452 | } |
453 | ||
e81c3a4c YW |
454 | l = read(fd, p, size - 1); |
455 | if (l < 0) { | |
456 | if (errno != EAGAIN) | |
457 | log_error_errno(errno, "Failed to read stdout of '%s': %m", spawn->cmd); | |
912541b0 | 458 | |
e81c3a4c | 459 | return 0; |
912541b0 KS |
460 | } |
461 | ||
e81c3a4c YW |
462 | p[l] = '\0'; |
463 | if (fd == spawn->fd_stdout && spawn->result) | |
464 | spawn->result_len += l; | |
912541b0 | 465 | |
e81c3a4c YW |
466 | /* Log output only if we watch stderr. */ |
467 | if (l > 0 && spawn->fd_stderr >= 0) { | |
468 | _cleanup_strv_free_ char **v = NULL; | |
469 | char **q; | |
912541b0 | 470 | |
e81c3a4c YW |
471 | v = strv_split_newlines(p); |
472 | if (!v) | |
473 | return 0; | |
912541b0 | 474 | |
e81c3a4c YW |
475 | STRV_FOREACH(q, v) |
476 | log_debug("'%s'(%s) '%s'", spawn->cmd, | |
477 | fd == spawn->fd_stdout ? "out" : "err", *q); | |
912541b0 KS |
478 | } |
479 | ||
e81c3a4c | 480 | return 0; |
2181d30a KS |
481 | } |
482 | ||
8128f229 TG |
483 | static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
484 | Spawn *spawn = userdata; | |
4375dab5 | 485 | char timeout[FORMAT_TIMESPAN_MAX]; |
912541b0 | 486 | |
8128f229 | 487 | assert(spawn); |
912541b0 | 488 | |
8128f229 | 489 | kill_and_sigcont(spawn->pid, SIGKILL); |
912541b0 | 490 | |
5ca3dbc9 | 491 | log_error("Spawned process '%s' ["PID_FMT"] timed out after %s, killing", spawn->cmd, spawn->pid, |
4375dab5 | 492 | format_timespan(timeout, sizeof(timeout), spawn->timeout_usec, USEC_PER_SEC)); |
912541b0 | 493 | |
8128f229 TG |
494 | return 1; |
495 | } | |
67117413 | 496 | |
8128f229 TG |
497 | static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { |
498 | Spawn *spawn = userdata; | |
4375dab5 | 499 | char timeout[FORMAT_TIMESPAN_MAX]; |
912541b0 | 500 | |
8128f229 | 501 | assert(spawn); |
67117413 | 502 | |
5ca3dbc9 | 503 | log_warning("Spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", spawn->cmd, spawn->pid, |
4375dab5 | 504 | format_timespan(timeout, sizeof(timeout), spawn->timeout_warn_usec, USEC_PER_SEC)); |
8128f229 TG |
505 | |
506 | return 1; | |
507 | } | |
508 | ||
509 | static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
510 | Spawn *spawn = userdata; | |
511 | ||
512 | assert(spawn); | |
513 | ||
514 | switch (si->si_code) { | |
515 | case CLD_EXITED: | |
53318514 TG |
516 | if (si->si_status == 0) { |
517 | log_debug("Process '%s' succeeded.", spawn->cmd); | |
8128f229 TG |
518 | sd_event_exit(sd_event_source_get_event(s), 0); |
519 | ||
520 | return 1; | |
4e57ad35 | 521 | } |
912541b0 | 522 | |
4e57ad35 YW |
523 | log_full(spawn->accept_failure ? LOG_DEBUG : LOG_WARNING, |
524 | "Process '%s' failed with exit code %i.", spawn->cmd, si->si_status); | |
8128f229 TG |
525 | break; |
526 | case CLD_KILLED: | |
527 | case CLD_DUMPED: | |
53318514 | 528 | log_warning("Process '%s' terminated by signal %s.", spawn->cmd, signal_to_string(si->si_status)); |
912541b0 | 529 | |
8128f229 TG |
530 | break; |
531 | default: | |
53318514 | 532 | log_error("Process '%s' failed due to unknown reason.", spawn->cmd); |
8128f229 | 533 | } |
912541b0 | 534 | |
8128f229 TG |
535 | sd_event_exit(sd_event_source_get_event(s), -EIO); |
536 | ||
537 | return 1; | |
538 | } | |
539 | ||
e81c3a4c | 540 | static int spawn_wait(Spawn *spawn) { |
4afd3348 | 541 | _cleanup_(sd_event_unrefp) sd_event *e = NULL; |
8128f229 TG |
542 | int r, ret; |
543 | ||
e81c3a4c YW |
544 | assert(spawn); |
545 | ||
8128f229 TG |
546 | r = sd_event_new(&e); |
547 | if (r < 0) | |
548 | return r; | |
549 | ||
e81c3a4c | 550 | if (spawn->timeout_usec > 0) { |
8128f229 TG |
551 | usec_t usec, age_usec; |
552 | ||
3285baa8 | 553 | usec = now(CLOCK_MONOTONIC); |
e81c3a4c YW |
554 | age_usec = usec - spawn->event_birth_usec; |
555 | if (age_usec < spawn->timeout_usec) { | |
556 | if (spawn->timeout_warn_usec > 0 && | |
557 | spawn->timeout_warn_usec < spawn->timeout_usec && | |
558 | spawn->timeout_warn_usec > age_usec) { | |
559 | spawn->timeout_warn_usec -= age_usec; | |
8128f229 | 560 | |
3285baa8 | 561 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c YW |
562 | usec + spawn->timeout_warn_usec, USEC_PER_SEC, |
563 | on_spawn_timeout_warning, spawn); | |
8128f229 TG |
564 | if (r < 0) |
565 | return r; | |
912541b0 | 566 | } |
8128f229 | 567 | |
e81c3a4c | 568 | spawn->timeout_usec -= age_usec; |
8128f229 | 569 | |
3285baa8 | 570 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c | 571 | usec + spawn->timeout_usec, USEC_PER_SEC, on_spawn_timeout, spawn); |
8128f229 TG |
572 | if (r < 0) |
573 | return r; | |
912541b0 KS |
574 | } |
575 | } | |
8128f229 | 576 | |
e81c3a4c YW |
577 | r = sd_event_add_io(e, NULL, spawn->fd_stdout, EPOLLIN, on_spawn_io, spawn); |
578 | if (r < 0) | |
579 | return r; | |
580 | ||
581 | r = sd_event_add_io(e, NULL, spawn->fd_stderr, EPOLLIN, on_spawn_io, spawn); | |
582 | if (r < 0) | |
583 | return r; | |
584 | ||
585 | r = sd_event_add_child(e, NULL, spawn->pid, WEXITED, on_spawn_sigchld, spawn); | |
8128f229 TG |
586 | if (r < 0) |
587 | return r; | |
588 | ||
589 | r = sd_event_loop(e); | |
590 | if (r < 0) | |
591 | return r; | |
592 | ||
593 | r = sd_event_get_exit_code(e, &ret); | |
594 | if (r < 0) | |
595 | return r; | |
596 | ||
597 | return ret; | |
2181d30a KS |
598 | } |
599 | ||
600 | int udev_event_spawn(struct udev_event *event, | |
dd5eddd2 | 601 | usec_t timeout_usec, |
53318514 | 602 | bool accept_failure, |
bbf35206 | 603 | const char *cmd, |
dd5eddd2 | 604 | char *result, size_t ressize) { |
feaa6db7 YW |
605 | _cleanup_close_pair_ int outpipe[2] = {-1, -1}, errpipe[2] = {-1, -1}; |
606 | _cleanup_strv_free_ char **argv = NULL; | |
947ce772 | 607 | char **envp = NULL; |
e81c3a4c | 608 | Spawn spawn; |
912541b0 | 609 | pid_t pid; |
feaa6db7 | 610 | int r; |
912541b0 | 611 | |
dc8aec36 YW |
612 | assert(event); |
613 | assert(event->dev); | |
e81c3a4c YW |
614 | assert(result || ressize == 0); |
615 | ||
912541b0 | 616 | /* pipes from child to parent */ |
2e48548f | 617 | if (result || log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 618 | if (pipe2(outpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
feaa6db7 | 619 | return log_error_errno(errno, "Failed to create pipe for command '%s': %m", cmd); |
912541b0 | 620 | |
feaa6db7 | 621 | if (log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 622 | if (pipe2(errpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
feaa6db7 YW |
623 | return log_error_errno(errno, "Failed to create pipe for command '%s': %m", cmd); |
624 | ||
625 | argv = strv_split_full(cmd, NULL, SPLIT_QUOTES|SPLIT_RELAX); | |
626 | if (!argv) | |
627 | return log_oom(); | |
628 | ||
baaa35ad ZJS |
629 | if (isempty(argv[0])) |
630 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
631 | "Invalid command '%s'", cmd); | |
dc8aec36 | 632 | |
feaa6db7 YW |
633 | /* allow programs in /usr/lib/udev/ to be called without the path */ |
634 | if (!path_is_absolute(argv[0])) { | |
635 | char *program; | |
636 | ||
62a85ee0 | 637 | program = path_join(UDEVLIBEXECDIR, argv[0]); |
feaa6db7 YW |
638 | if (!program) |
639 | return log_oom(); | |
bbf35206 | 640 | |
feaa6db7 YW |
641 | free_and_replace(argv[0], program); |
642 | } | |
643 | ||
cf28ad46 | 644 | r = device_get_properties_strv(event->dev, &envp); |
947ce772 | 645 | if (r < 0) |
cf28ad46 | 646 | return log_device_error_errno(event->dev, r, "Failed to get device properties"); |
947ce772 | 647 | |
3ad4d482 YW |
648 | log_debug("Starting '%s'", cmd); |
649 | ||
6ce075a2 | 650 | r = safe_fork("(spawn)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); |
feaa6db7 YW |
651 | if (r < 0) |
652 | return log_error_errno(r, "Failed to fork() to execute command '%s': %m", cmd); | |
653 | if (r == 0) { | |
84b1ccb9 YW |
654 | if (rearrange_stdio(-1, outpipe[WRITE_END], errpipe[WRITE_END]) < 0) |
655 | _exit(EXIT_FAILURE); | |
912541b0 | 656 | |
84b1ccb9 | 657 | (void) close_all_fds(NULL, 0); |
595225af | 658 | (void) rlimit_nofile_safe(); |
912541b0 | 659 | |
947ce772 | 660 | execve(argv[0], argv, envp); |
84b1ccb9 | 661 | _exit(EXIT_FAILURE); |
bbf35206 | 662 | } |
912541b0 | 663 | |
4c253ed1 LP |
664 | /* parent closed child's ends of pipes */ |
665 | outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]); | |
666 | errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]); | |
912541b0 | 667 | |
e81c3a4c YW |
668 | spawn = (Spawn) { |
669 | .cmd = cmd, | |
670 | .pid = pid, | |
671 | .accept_failure = accept_failure, | |
66f737b4 | 672 | .timeout_warn_usec = udev_warn_timeout(timeout_usec), |
e81c3a4c YW |
673 | .timeout_usec = timeout_usec, |
674 | .event_birth_usec = event->birth_usec, | |
675 | .fd_stdout = outpipe[READ_END], | |
676 | .fd_stderr = errpipe[READ_END], | |
677 | .result = result, | |
678 | .result_size = ressize, | |
679 | }; | |
680 | r = spawn_wait(&spawn); | |
feaa6db7 YW |
681 | if (r < 0) |
682 | return log_error_errno(r, "Failed to wait spawned command '%s': %m", cmd); | |
2181d30a | 683 | |
e81c3a4c YW |
684 | if (result) |
685 | result[spawn.result_len] = '\0'; | |
686 | ||
feaa6db7 | 687 | return r; |
2181d30a KS |
688 | } |
689 | ||
9ec6e95b | 690 | static int rename_netif(struct udev_event *event) { |
cf28ad46 | 691 | sd_device *dev = event->dev; |
2740750d | 692 | const char *action, *oldname; |
16d26d55 | 693 | char name[IFNAMSIZ]; |
2740750d YW |
694 | int ifindex, r; |
695 | ||
696 | if (!event->name) | |
697 | return 0; /* No new name is requested. */ | |
698 | ||
699 | r = sd_device_get_sysname(dev, &oldname); | |
700 | if (r < 0) | |
701 | return log_device_error_errno(dev, r, "Failed to get sysname: %m"); | |
702 | ||
703 | if (streq(event->name, oldname)) | |
704 | return 0; /* The interface name is already requested name. */ | |
705 | ||
706 | r = sd_device_get_property_value(dev, "ACTION", &action); | |
707 | if (r < 0) | |
708 | return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m"); | |
709 | ||
710 | if (!streq(action, "add")) | |
711 | return 0; /* Rename the interface only when it is added. */ | |
16d26d55 | 712 | |
2740750d YW |
713 | r = sd_device_get_ifindex(dev, &ifindex); |
714 | if (r == -ENOENT) | |
715 | return 0; /* Device is not a network interface. */ | |
716 | if (r < 0) | |
717 | return log_device_error_errno(dev, r, "Failed to get ifindex: %m"); | |
912541b0 | 718 | |
16d26d55 | 719 | strscpy(name, IFNAMSIZ, event->name); |
2740750d YW |
720 | r = rtnl_set_link_name(&event->rtnl, ifindex, name); |
721 | if (r < 0) | |
722 | return log_device_error_errno(dev, r, "Failed to rename network interface %i from '%s' to '%s': %m", ifindex, oldname, name); | |
912541b0 | 723 | |
2740750d | 724 | r = device_rename(dev, event->name); |
f647962d | 725 | if (r < 0) |
2740750d | 726 | 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 | 727 | |
2740750d | 728 | log_device_debug(dev, "Network interface %i is renamed from '%s' to '%s'", ifindex, oldname, name); |
16d26d55 | 729 | |
2740750d | 730 | return 1; |
d46f37fd KS |
731 | } |
732 | ||
e52eaf56 | 733 | static int update_devnode(struct udev_event *event) { |
cf28ad46 | 734 | sd_device *dev = event->dev; |
e52eaf56 | 735 | const char *action; |
e52eaf56 YW |
736 | bool apply; |
737 | int r; | |
738 | ||
7af1c780 | 739 | r = sd_device_get_devnum(dev, NULL); |
e52eaf56 YW |
740 | if (r == -ENOENT) |
741 | return 0; | |
742 | if (r < 0) | |
743 | return log_device_error_errno(dev, r, "Failed to get devnum: %m"); | |
744 | ||
745 | /* remove/update possible left-over symlinks from old database entry */ | |
480ecb7d YW |
746 | if (event->dev_db_clone) |
747 | (void) udev_node_update_old_links(dev, event->dev_db_clone); | |
e52eaf56 YW |
748 | |
749 | if (!event->owner_set) { | |
750 | r = device_get_devnode_uid(dev, &event->uid); | |
751 | if (r < 0 && r != -ENOENT) | |
752 | return log_device_error_errno(dev, r, "Failed to get devnode UID: %m"); | |
753 | } | |
754 | ||
755 | if (!event->group_set) { | |
756 | r = device_get_devnode_gid(dev, &event->gid); | |
757 | if (r < 0 && r != -ENOENT) | |
758 | return log_device_error_errno(dev, r, "Failed to get devnode GID: %m"); | |
759 | } | |
760 | ||
761 | if (!event->mode_set) { | |
762 | r = device_get_devnode_mode(dev, &event->mode); | |
763 | if (r < 0 && r != -ENOENT) | |
764 | return log_device_error_errno(dev, r, "Failed to get devnode mode: %m"); | |
765 | if (r == -ENOENT) { | |
766 | if (event->gid > 0) | |
767 | /* default 0660 if a group is assigned */ | |
768 | event->mode = 0660; | |
769 | else | |
770 | /* default 0600 */ | |
771 | event->mode = 0600; | |
772 | } | |
773 | } | |
774 | ||
775 | r = sd_device_get_property_value(dev, "ACTION", &action); | |
776 | if (r < 0) | |
777 | return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m"); | |
778 | ||
779 | apply = streq(action, "add") || event->owner_set || event->group_set || event->mode_set; | |
780 | return udev_node_add(dev, apply, event->mode, event->uid, event->gid, event->seclabel_list); | |
781 | } | |
782 | ||
eb1f9e30 YW |
783 | static void event_execute_rules_on_remove( |
784 | struct udev_event *event, | |
66f737b4 | 785 | usec_t timeout_usec, |
eb1f9e30 YW |
786 | Hashmap *properties_list, |
787 | struct udev_rules *rules) { | |
912541b0 | 788 | |
cf28ad46 | 789 | sd_device *dev = event->dev; |
eb1f9e30 | 790 | int r; |
912541b0 | 791 | |
eb1f9e30 YW |
792 | r = device_read_db_force(dev); |
793 | if (r < 0) | |
794 | log_device_debug_errno(dev, r, "Failed to read database under /run/udev/data/: %m"); | |
107f2e25 | 795 | |
eb1f9e30 YW |
796 | r = device_tag_index(dev, NULL, false); |
797 | if (r < 0) | |
798 | log_device_debug_errno(dev, r, "Failed to remove corresponding tag files under /run/udev/tag/, ignoring: %m"); | |
912541b0 | 799 | |
eb1f9e30 YW |
800 | r = device_delete_db(dev); |
801 | if (r < 0) | |
802 | log_device_debug_errno(dev, r, "Failed to delete database under /run/udev/data/, ignoring: %m"); | |
912541b0 | 803 | |
d4a95a95 | 804 | if (sd_device_get_devnum(dev, NULL) >= 0) |
eb1f9e30 YW |
805 | (void) udev_watch_end(dev); |
806 | ||
66f737b4 | 807 | (void) udev_rules_apply_to_event(rules, event, timeout_usec, properties_list); |
eb1f9e30 | 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, | |
66f737b4 | 814 | usec_t timeout_usec, |
eb1f9e30 YW |
815 | Hashmap *properties_list, |
816 | struct udev_rules *rules) { | |
cf28ad46 | 817 | sd_device *dev = event->dev; |
eb1f9e30 | 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 | 832 | if (streq(action, "remove")) { |
66f737b4 | 833 | event_execute_rules_on_remove(event, timeout_usec, properties_list, rules); |
eb1f9e30 YW |
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 | 856 | |
66f737b4 | 857 | (void) udev_rules_apply_to_event(rules, event, timeout_usec, properties_list); |
eb1f9e30 YW |
858 | |
859 | (void) rename_netif(event); | |
860 | (void) update_devnode(event); | |
861 | ||
862 | /* preserve old, or get new initialization timestamp */ | |
480ecb7d | 863 | r = device_ensure_usec_initialized(dev, event->dev_db_clone); |
eb1f9e30 YW |
864 | if (r < 0) |
865 | log_device_debug_errno(dev, r, "Failed to set initialization timestamp, ignoring: %m"); | |
866 | ||
867 | /* (re)write database file */ | |
480ecb7d | 868 | r = device_tag_index(dev, event->dev_db_clone, true); |
eb1f9e30 YW |
869 | if (r < 0) |
870 | log_device_debug_errno(dev, r, "Failed to update tags under /run/udev/tag/, ignoring: %m"); | |
871 | ||
872 | r = device_update_db(dev); | |
873 | if (r < 0) | |
874 | log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/, ignoring: %m"); | |
875 | ||
876 | device_set_is_initialized(dev); | |
877 | ||
480ecb7d | 878 | event->dev_db_clone = sd_device_unref(event->dev_db_clone); |
eb1f9e30 YW |
879 | |
880 | return 0; | |
d46f37fd | 881 | } |
2d73813e | 882 | |
66f737b4 | 883 | void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec) { |
29448498 YW |
884 | const char *cmd; |
885 | void *val; | |
886 | Iterator i; | |
912541b0 | 887 | |
29448498 YW |
888 | HASHMAP_FOREACH_KEY(val, cmd, event->run_list, i) { |
889 | enum udev_builtin_cmd builtin_cmd = PTR_TO_INT(val); | |
bbf35206 | 890 | char command[UTIL_PATH_SIZE]; |
83cd6b75 | 891 | |
e20a9171 | 892 | udev_event_apply_format(event, cmd, command, sizeof(command), false); |
912541b0 | 893 | |
c45b369d | 894 | if (builtin_cmd >= 0 && builtin_cmd < _UDEV_BUILTIN_MAX) |
cf28ad46 | 895 | udev_builtin_run(event->dev, builtin_cmd, command, false); |
bbf35206 | 896 | else { |
6b92f429 | 897 | if (event->exec_delay_usec > 0) { |
bbf35206 | 898 | log_debug("delay execution of '%s'", command); |
6b92f429 | 899 | (void) usleep(event->exec_delay_usec); |
912541b0 KS |
900 | } |
901 | ||
66f737b4 | 902 | udev_event_spawn(event, timeout_usec, false, command, NULL, 0); |
912541b0 KS |
903 | } |
904 | } | |
2d73813e | 905 | } |