]>
Commit | Line | Data |
---|---|---|
f13467ec | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
d46f37fd | 2 | |
d46f37fd | 3 | #include <ctype.h> |
07630cea LP |
4 | #include <errno.h> |
5 | #include <fcntl.h> | |
959e8b5d | 6 | #include <net/if.h> |
07630cea | 7 | #include <stddef.h> |
07630cea | 8 | #include <stdlib.h> |
010f917c | 9 | #include <sys/wait.h> |
07630cea | 10 | #include <unistd.h> |
d46f37fd | 11 | |
e81c3a4c YW |
12 | #include "sd-event.h" |
13 | ||
b5efdb8a | 14 | #include "alloc-util.h" |
ff88b949 | 15 | #include "device-internal.h" |
947ce772 | 16 | #include "device-private.h" |
e9343893 | 17 | #include "device-util.h" |
3ffd4af2 | 18 | #include "fd-util.h" |
25de7aa7 | 19 | #include "fs-util.h" |
f97b34a6 | 20 | #include "format-util.h" |
068b0f77 | 21 | #include "netif-naming-scheme.h" |
07630cea | 22 | #include "netlink-util.h" |
ce4f94b8 | 23 | #include "parse-util.h" |
feaa6db7 | 24 | #include "path-util.h" |
8128f229 | 25 | #include "process-util.h" |
24882e06 | 26 | #include "signal-util.h" |
4cade7a1 | 27 | #include "stdio-util.h" |
07630cea | 28 | #include "string-util.h" |
5ea78a39 YW |
29 | #include "strv.h" |
30 | #include "strxcpyx.h" | |
07a26e42 | 31 | #include "udev-builtin.h" |
25de7aa7 | 32 | #include "udev-event.h" |
a2554ace | 33 | #include "udev-node.h" |
d4d690fa | 34 | #include "udev-util.h" |
70068602 | 35 | #include "udev-watch.h" |
25de7aa7 | 36 | #include "user-util.h" |
8128f229 TG |
37 | |
38 | typedef struct Spawn { | |
88d566aa | 39 | sd_device *device; |
8128f229 TG |
40 | const char *cmd; |
41 | pid_t pid; | |
e81c3a4c YW |
42 | usec_t timeout_warn_usec; |
43 | usec_t timeout_usec; | |
e2099267 | 44 | int timeout_signal; |
e81c3a4c | 45 | usec_t event_birth_usec; |
53318514 | 46 | bool accept_failure; |
e81c3a4c YW |
47 | int fd_stdout; |
48 | int fd_stderr; | |
49 | char *result; | |
50 | size_t result_size; | |
51 | size_t result_len; | |
6b6e471a | 52 | bool truncated; |
8128f229 | 53 | } Spawn; |
d46f37fd | 54 | |
1a0bd015 | 55 | UdevEvent *udev_event_new(sd_device *dev, usec_t exec_delay_usec, sd_netlink *rtnl, int log_level) { |
2e088715 | 56 | UdevEvent *event; |
912541b0 | 57 | |
89665d09 YW |
58 | assert(dev); |
59 | ||
2e088715 | 60 | event = new(UdevEvent, 1); |
89665d09 | 61 | if (!event) |
912541b0 | 62 | return NULL; |
89665d09 | 63 | |
2e088715 | 64 | *event = (UdevEvent) { |
cf28ad46 | 65 | .dev = sd_device_ref(dev), |
89665d09 | 66 | .birth_usec = now(CLOCK_MONOTONIC), |
6b92f429 | 67 | .exec_delay_usec = exec_delay_usec, |
e0bb2ff9 | 68 | .rtnl = sd_netlink_ref(rtnl), |
25de7aa7 YW |
69 | .uid = UID_INVALID, |
70 | .gid = GID_INVALID, | |
71 | .mode = MODE_INVALID, | |
1a0bd015 YW |
72 | .log_level_was_debug = log_level == LOG_DEBUG, |
73 | .default_log_level = log_level, | |
89665d09 YW |
74 | }; |
75 | ||
912541b0 | 76 | return event; |
aa8734ff KS |
77 | } |
78 | ||
2e088715 | 79 | UdevEvent *udev_event_free(UdevEvent *event) { |
c1118ceb YW |
80 | if (!event) |
81 | return NULL; | |
82 | ||
cf28ad46 | 83 | sd_device_unref(event->dev); |
480ecb7d | 84 | sd_device_unref(event->dev_db_clone); |
1c4baffc | 85 | sd_netlink_unref(event->rtnl); |
39a15c8a YW |
86 | ordered_hashmap_free_free_key(event->run_list); |
87 | ordered_hashmap_free_free_free(event->seclabel_list); | |
912541b0 KS |
88 | free(event->program_result); |
89 | free(event->name); | |
c1118ceb YW |
90 | |
91 | return mfree(event); | |
aa8734ff KS |
92 | } |
93 | ||
7e9c23dd YW |
94 | typedef enum { |
95 | FORMAT_SUBST_DEVNODE, | |
96 | FORMAT_SUBST_ATTR, | |
97 | FORMAT_SUBST_ENV, | |
98 | FORMAT_SUBST_KERNEL, | |
99 | FORMAT_SUBST_KERNEL_NUMBER, | |
100 | FORMAT_SUBST_DRIVER, | |
101 | FORMAT_SUBST_DEVPATH, | |
102 | FORMAT_SUBST_ID, | |
103 | FORMAT_SUBST_MAJOR, | |
104 | FORMAT_SUBST_MINOR, | |
105 | FORMAT_SUBST_RESULT, | |
106 | FORMAT_SUBST_PARENT, | |
107 | FORMAT_SUBST_NAME, | |
108 | FORMAT_SUBST_LINKS, | |
109 | FORMAT_SUBST_ROOT, | |
110 | FORMAT_SUBST_SYS, | |
111 | _FORMAT_SUBST_TYPE_MAX, | |
2d93c20e | 112 | _FORMAT_SUBST_TYPE_INVALID = -EINVAL, |
7e9c23dd | 113 | } FormatSubstitutionType; |
0d53705b | 114 | |
9204d802 YW |
115 | struct subst_map_entry { |
116 | const char *name; | |
117 | const char fmt; | |
7e9c23dd | 118 | FormatSubstitutionType type; |
9204d802 YW |
119 | }; |
120 | ||
121 | static const struct subst_map_entry map[] = { | |
bb1234d1 YW |
122 | { .name = "devnode", .fmt = 'N', .type = FORMAT_SUBST_DEVNODE }, |
123 | { .name = "tempnode", .fmt = 'N', .type = FORMAT_SUBST_DEVNODE }, /* deprecated */ | |
124 | { .name = "attr", .fmt = 's', .type = FORMAT_SUBST_ATTR }, | |
125 | { .name = "sysfs", .fmt = 's', .type = FORMAT_SUBST_ATTR }, /* deprecated */ | |
126 | { .name = "env", .fmt = 'E', .type = FORMAT_SUBST_ENV }, | |
127 | { .name = "kernel", .fmt = 'k', .type = FORMAT_SUBST_KERNEL }, | |
7e9c23dd | 128 | { .name = "number", .fmt = 'n', .type = FORMAT_SUBST_KERNEL_NUMBER }, |
bb1234d1 YW |
129 | { .name = "driver", .fmt = 'd', .type = FORMAT_SUBST_DRIVER }, |
130 | { .name = "devpath", .fmt = 'p', .type = FORMAT_SUBST_DEVPATH }, | |
131 | { .name = "id", .fmt = 'b', .type = FORMAT_SUBST_ID }, | |
132 | { .name = "major", .fmt = 'M', .type = FORMAT_SUBST_MAJOR }, | |
133 | { .name = "minor", .fmt = 'm', .type = FORMAT_SUBST_MINOR }, | |
134 | { .name = "result", .fmt = 'c', .type = FORMAT_SUBST_RESULT }, | |
135 | { .name = "parent", .fmt = 'P', .type = FORMAT_SUBST_PARENT }, | |
136 | { .name = "name", .fmt = 'D', .type = FORMAT_SUBST_NAME }, | |
137 | { .name = "links", .fmt = 'L', .type = FORMAT_SUBST_LINKS }, | |
138 | { .name = "root", .fmt = 'r', .type = FORMAT_SUBST_ROOT }, | |
139 | { .name = "sys", .fmt = 'S', .type = FORMAT_SUBST_SYS }, | |
9204d802 YW |
140 | }; |
141 | ||
13cd553f YW |
142 | static const char *format_type_to_string(FormatSubstitutionType t) { |
143 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
144 | if (map[i].type == t) | |
145 | return map[i].name; | |
146 | return NULL; | |
147 | } | |
148 | ||
149 | static char format_type_to_char(FormatSubstitutionType t) { | |
150 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
151 | if (map[i].type == t) | |
152 | return map[i].fmt; | |
153 | return '\0'; | |
154 | } | |
155 | ||
c8eaaf69 | 156 | static int get_subst_type(const char **str, bool strict, FormatSubstitutionType *ret_type, char ret_attr[static UDEV_PATH_SIZE]) { |
13cd553f YW |
157 | const char *p = *str, *q = NULL; |
158 | size_t i; | |
159 | ||
160 | assert(str); | |
161 | assert(*str); | |
162 | assert(ret_type); | |
2caa38e9 | 163 | assert(ret_attr); |
13cd553f | 164 | |
1824300a | 165 | if (*p == '$') { |
13cd553f | 166 | p++; |
1824300a | 167 | if (*p == '$') { |
13cd553f YW |
168 | *str = p; |
169 | return 0; | |
170 | } | |
171 | for (i = 0; i < ELEMENTSOF(map); i++) | |
172 | if ((q = startswith(p, map[i].name))) | |
173 | break; | |
1824300a | 174 | } else if (*p == '%') { |
13cd553f | 175 | p++; |
1824300a | 176 | if (*p == '%') { |
13cd553f YW |
177 | *str = p; |
178 | return 0; | |
179 | } | |
180 | ||
181 | for (i = 0; i < ELEMENTSOF(map); i++) | |
1824300a | 182 | if (*p == map[i].fmt) { |
13cd553f YW |
183 | q = p + 1; |
184 | break; | |
185 | } | |
d7aee41d | 186 | } else |
13cd553f | 187 | return 0; |
d7aee41d YW |
188 | if (!q) |
189 | /* When 'strict' flag is set, then '$' and '%' must be escaped. */ | |
190 | return strict ? -EINVAL : 0; | |
13cd553f | 191 | |
1824300a | 192 | if (*q == '{') { |
13cd553f YW |
193 | const char *start, *end; |
194 | size_t len; | |
195 | ||
196 | start = q + 1; | |
197 | end = strchr(start, '}'); | |
198 | if (!end) | |
199 | return -EINVAL; | |
200 | ||
201 | len = end - start; | |
c8eaaf69 | 202 | if (len == 0 || len >= UDEV_PATH_SIZE) |
13cd553f YW |
203 | return -EINVAL; |
204 | ||
c8eaaf69 | 205 | strnscpy(ret_attr, UDEV_PATH_SIZE, start, len); |
13cd553f YW |
206 | q = end + 1; |
207 | } else | |
1824300a | 208 | *ret_attr = '\0'; |
13cd553f YW |
209 | |
210 | *str = q; | |
211 | *ret_type = map[i].type; | |
212 | return 1; | |
213 | } | |
214 | ||
ce4f94b8 YW |
215 | static int safe_atou_optional_plus(const char *s, unsigned *ret) { |
216 | const char *p; | |
217 | int r; | |
218 | ||
219 | assert(s); | |
220 | assert(ret); | |
221 | ||
222 | /* Returns 1 if plus, 0 if no plus, negative on error */ | |
223 | ||
224 | p = endswith(s, "+"); | |
225 | if (p) | |
2f82562b | 226 | s = strndupa_safe(s, p - s); |
ce4f94b8 YW |
227 | |
228 | r = safe_atou(s, ret); | |
229 | if (r < 0) | |
230 | return r; | |
231 | ||
232 | return !!p; | |
233 | } | |
234 | ||
ef315ada YW |
235 | static ssize_t udev_event_subst_format( |
236 | UdevEvent *event, | |
237 | FormatSubstitutionType type, | |
238 | const char *attr, | |
239 | char *dest, | |
f6caab89 YW |
240 | size_t l, |
241 | bool *ret_truncated) { | |
242 | ||
fbd747a4 | 243 | sd_device *parent, *dev = ASSERT_PTR(ASSERT_PTR(event)->dev); |
4cade7a1 | 244 | const char *val = NULL; |
f6caab89 | 245 | bool truncated = false; |
be452683 | 246 | char *s = dest; |
4cade7a1 | 247 | int r; |
0d53705b | 248 | |
ef315ada | 249 | switch (type) { |
7e9c23dd | 250 | case FORMAT_SUBST_DEVPATH: |
4cade7a1 YW |
251 | r = sd_device_get_devpath(dev, &val); |
252 | if (r < 0) | |
253 | return r; | |
f6caab89 | 254 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 255 | break; |
7e9c23dd | 256 | case FORMAT_SUBST_KERNEL: |
4cade7a1 YW |
257 | r = sd_device_get_sysname(dev, &val); |
258 | if (r < 0) | |
259 | return r; | |
f6caab89 | 260 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 261 | break; |
7e9c23dd | 262 | case FORMAT_SUBST_KERNEL_NUMBER: |
4cade7a1 | 263 | r = sd_device_get_sysnum(dev, &val); |
380d1901 YW |
264 | if (r == -ENOENT) |
265 | goto null_terminate; | |
4cade7a1 | 266 | if (r < 0) |
380d1901 | 267 | return r; |
f6caab89 | 268 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 269 | break; |
7e9c23dd | 270 | case FORMAT_SUBST_ID: |
4cade7a1 | 271 | if (!event->dev_parent) |
380d1901 | 272 | goto null_terminate; |
f3d241fe | 273 | r = sd_device_get_sysname(event->dev_parent, &val); |
4cade7a1 YW |
274 | if (r < 0) |
275 | return r; | |
f6caab89 | 276 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 277 | break; |
7e9c23dd | 278 | case FORMAT_SUBST_DRIVER: |
4cade7a1 | 279 | if (!event->dev_parent) |
380d1901 | 280 | goto null_terminate; |
f3d241fe | 281 | r = sd_device_get_driver(event->dev_parent, &val); |
380d1901 YW |
282 | if (r == -ENOENT) |
283 | goto null_terminate; | |
4cade7a1 | 284 | if (r < 0) |
380d1901 | 285 | return r; |
f6caab89 | 286 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 287 | break; |
7e9c23dd YW |
288 | case FORMAT_SUBST_MAJOR: |
289 | case FORMAT_SUBST_MINOR: { | |
1b65f1eb | 290 | dev_t devnum; |
0d53705b | 291 | |
4cade7a1 YW |
292 | r = sd_device_get_devnum(dev, &devnum); |
293 | if (r < 0 && r != -ENOENT) | |
294 | return r; | |
f6caab89 | 295 | strpcpyf_full(&s, l, &truncated, "%u", r < 0 ? 0 : type == FORMAT_SUBST_MAJOR ? major(devnum) : minor(devnum)); |
0d53705b DS |
296 | break; |
297 | } | |
7e9c23dd | 298 | case FORMAT_SUBST_RESULT: { |
ce4f94b8 YW |
299 | unsigned index = 0; /* 0 means whole string */ |
300 | bool has_plus; | |
0d53705b | 301 | |
4cade7a1 | 302 | if (!event->program_result) |
380d1901 | 303 | goto null_terminate; |
4cade7a1 | 304 | |
ce4f94b8 YW |
305 | if (!isempty(attr)) { |
306 | r = safe_atou_optional_plus(attr, &index); | |
307 | if (r < 0) | |
308 | return r; | |
309 | ||
310 | has_plus = r; | |
311 | } | |
312 | ||
313 | if (index == 0) | |
f6caab89 | 314 | strpcpy_full(&s, l, event->program_result, &truncated); |
ce4f94b8 YW |
315 | else { |
316 | const char *start, *p; | |
317 | unsigned i; | |
318 | ||
319 | p = skip_leading_chars(event->program_result, NULL); | |
320 | ||
321 | for (i = 1; i < index; i++) { | |
1824300a | 322 | while (*p && !strchr(WHITESPACE, *p)) |
ce4f94b8 YW |
323 | p++; |
324 | p = skip_leading_chars(p, NULL); | |
325 | if (*p == '\0') | |
0d53705b DS |
326 | break; |
327 | } | |
ce4f94b8 YW |
328 | if (i != index) { |
329 | log_device_debug(dev, "requested part of result string not found"); | |
330 | goto null_terminate; | |
0d53705b | 331 | } |
ce4f94b8 YW |
332 | |
333 | start = p; | |
334 | /* %c{2+} copies the whole string from the second part on */ | |
335 | if (has_plus) | |
f6caab89 | 336 | strpcpy_full(&s, l, start, &truncated); |
ce4f94b8 | 337 | else { |
1824300a | 338 | while (*p && !strchr(WHITESPACE, *p)) |
ce4f94b8 | 339 | p++; |
f6caab89 | 340 | strnpcpy_full(&s, l, start, p - start, &truncated); |
0d53705b | 341 | } |
ce4f94b8 | 342 | } |
0d53705b DS |
343 | break; |
344 | } | |
7e9c23dd | 345 | case FORMAT_SUBST_ATTR: { |
c8eaaf69 | 346 | char vbuf[UDEV_NAME_SIZE]; |
0d53705b | 347 | int count; |
f6caab89 | 348 | bool t; |
0d53705b | 349 | |
13cd553f | 350 | if (isempty(attr)) |
4cade7a1 | 351 | return -EINVAL; |
0d53705b DS |
352 | |
353 | /* try to read the value specified by "[dmi/id]product_name" */ | |
1223227f | 354 | if (udev_resolve_subsys_kernel(attr, vbuf, sizeof(vbuf), true) == 0) |
4cade7a1 | 355 | val = vbuf; |
0d53705b DS |
356 | |
357 | /* try to read the attribute the device */ | |
4cade7a1 | 358 | if (!val) |
5bbcfbaa | 359 | (void) sd_device_get_sysattr_value(dev, attr, &val); |
0d53705b DS |
360 | |
361 | /* try to read the attribute of the parent device, other matches have selected */ | |
f3d241fe | 362 | if (!val && event->dev_parent && event->dev_parent != dev) |
5bbcfbaa | 363 | (void) sd_device_get_sysattr_value(event->dev_parent, attr, &val); |
0d53705b | 364 | |
4cade7a1 | 365 | if (!val) |
380d1901 | 366 | goto null_terminate; |
0d53705b DS |
367 | |
368 | /* strip trailing whitespace, and replace unwanted characters */ | |
4cade7a1 | 369 | if (val != vbuf) |
f6caab89 | 370 | strscpy_full(vbuf, sizeof(vbuf), val, &truncated); |
72801533 | 371 | delete_trailing_chars(vbuf, NULL); |
393fcaf7 | 372 | count = udev_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); |
0d53705b | 373 | if (count > 0) |
4cade7a1 | 374 | log_device_debug(dev, "%i character(s) replaced", count); |
f6caab89 YW |
375 | strpcpy_full(&s, l, vbuf, &t); |
376 | truncated = truncated || t; | |
0d53705b DS |
377 | break; |
378 | } | |
7e9c23dd | 379 | case FORMAT_SUBST_PARENT: |
4cade7a1 | 380 | r = sd_device_get_parent(dev, &parent); |
bc568a7a | 381 | if (r == -ENOENT) |
380d1901 | 382 | goto null_terminate; |
4cade7a1 | 383 | if (r < 0) |
380d1901 | 384 | return r; |
4cade7a1 | 385 | r = sd_device_get_devname(parent, &val); |
380d1901 YW |
386 | if (r == -ENOENT) |
387 | goto null_terminate; | |
4cade7a1 | 388 | if (r < 0) |
380d1901 | 389 | return r; |
f6caab89 | 390 | strpcpy_full(&s, l, val + STRLEN("/dev/"), &truncated); |
0d53705b | 391 | break; |
7e9c23dd | 392 | case FORMAT_SUBST_DEVNODE: |
4cade7a1 | 393 | r = sd_device_get_devname(dev, &val); |
380d1901 YW |
394 | if (r == -ENOENT) |
395 | goto null_terminate; | |
4cade7a1 | 396 | if (r < 0) |
380d1901 | 397 | return r; |
f6caab89 | 398 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 399 | break; |
7e9c23dd | 400 | case FORMAT_SUBST_NAME: |
4cade7a1 | 401 | if (event->name) |
f6caab89 | 402 | strpcpy_full(&s, l, event->name, &truncated); |
4cade7a1 | 403 | else if (sd_device_get_devname(dev, &val) >= 0) |
f6caab89 | 404 | strpcpy_full(&s, l, val + STRLEN("/dev/"), &truncated); |
4cade7a1 YW |
405 | else { |
406 | r = sd_device_get_sysname(dev, &val); | |
407 | if (r < 0) | |
408 | return r; | |
f6caab89 | 409 | strpcpy_full(&s, l, val, &truncated); |
4cade7a1 | 410 | } |
0d53705b | 411 | break; |
7e9c23dd | 412 | case FORMAT_SUBST_LINKS: |
f6caab89 | 413 | FOREACH_DEVICE_DEVLINK(dev, val) { |
4cade7a1 | 414 | if (s == dest) |
f6caab89 | 415 | strpcpy_full(&s, l, val + STRLEN("/dev/"), &truncated); |
4cade7a1 | 416 | else |
f6caab89 YW |
417 | strpcpyl_full(&s, l, &truncated, " ", val + STRLEN("/dev/"), NULL); |
418 | if (truncated) | |
419 | break; | |
420 | } | |
380d1901 YW |
421 | if (s == dest) |
422 | goto null_terminate; | |
0d53705b | 423 | break; |
7e9c23dd | 424 | case FORMAT_SUBST_ROOT: |
f6caab89 | 425 | strpcpy_full(&s, l, "/dev", &truncated); |
0d53705b | 426 | break; |
7e9c23dd | 427 | case FORMAT_SUBST_SYS: |
f6caab89 | 428 | strpcpy_full(&s, l, "/sys", &truncated); |
0d53705b | 429 | break; |
7e9c23dd | 430 | case FORMAT_SUBST_ENV: |
13cd553f YW |
431 | if (isempty(attr)) |
432 | return -EINVAL; | |
4cade7a1 | 433 | r = sd_device_get_property_value(dev, attr, &val); |
380d1901 YW |
434 | if (r == -ENOENT) |
435 | goto null_terminate; | |
4cade7a1 | 436 | if (r < 0) |
380d1901 | 437 | return r; |
f6caab89 | 438 | strpcpy_full(&s, l, val, &truncated); |
4cade7a1 | 439 | break; |
0d53705b | 440 | default: |
04499a70 | 441 | assert_not_reached(); |
0d53705b DS |
442 | } |
443 | ||
f6caab89 YW |
444 | if (ret_truncated) |
445 | *ret_truncated = truncated; | |
446 | ||
be452683 | 447 | return s - dest; |
380d1901 YW |
448 | |
449 | null_terminate: | |
f6caab89 YW |
450 | if (ret_truncated) |
451 | *ret_truncated = truncated; | |
452 | ||
380d1901 YW |
453 | *s = '\0'; |
454 | return 0; | |
0d53705b DS |
455 | } |
456 | ||
f6caab89 YW |
457 | size_t udev_event_apply_format( |
458 | UdevEvent *event, | |
459 | const char *src, | |
460 | char *dest, | |
461 | size_t size, | |
462 | bool replace_whitespace, | |
463 | bool *ret_truncated) { | |
464 | ||
465 | bool truncated = false; | |
99534007 | 466 | const char *s = ASSERT_PTR(src); |
13cd553f | 467 | int r; |
912541b0 | 468 | |
a368732b YW |
469 | assert(event); |
470 | assert(event->dev); | |
a368732b YW |
471 | assert(dest); |
472 | assert(size > 0); | |
3b64e4d4 | 473 | |
1824300a | 474 | while (*s) { |
13cd553f | 475 | FormatSubstitutionType type; |
c8eaaf69 | 476 | char attr[UDEV_PATH_SIZE]; |
4cade7a1 | 477 | ssize_t subst_len; |
f6caab89 | 478 | bool t; |
912541b0 | 479 | |
d7aee41d | 480 | r = get_subst_type(&s, false, &type, attr); |
5eb6ef8b YW |
481 | if (r < 0) { |
482 | log_device_warning_errno(event->dev, r, "Invalid format string, ignoring: %s", src); | |
483 | break; | |
484 | } else if (r == 0) { | |
f6caab89 YW |
485 | if (size < 2) { |
486 | /* need space for this char and the terminating NUL */ | |
487 | truncated = true; | |
13cd553f | 488 | break; |
f6caab89 | 489 | } |
13cd553f YW |
490 | *dest++ = *s++; |
491 | size--; | |
4cade7a1 YW |
492 | continue; |
493 | } | |
e20a9171 | 494 | |
f6caab89 | 495 | subst_len = udev_event_subst_format(event, type, attr, dest, size, &t); |
5eb6ef8b YW |
496 | if (subst_len < 0) { |
497 | log_device_warning_errno(event->dev, subst_len, | |
498 | "Failed to substitute variable '$%s' or apply format '%%%c', ignoring: %m", | |
499 | format_type_to_string(type), format_type_to_char(type)); | |
500 | break; | |
501 | } | |
13cd553f | 502 | |
f6caab89 YW |
503 | truncated = truncated || t; |
504 | ||
7e9c23dd | 505 | /* FORMAT_SUBST_RESULT handles spaces itself */ |
13cd553f | 506 | if (replace_whitespace && type != FORMAT_SUBST_RESULT) |
5953d8b9 | 507 | /* udev_replace_whitespace can replace in-place, |
13cd553f | 508 | * and does nothing if subst_len == 0 */ |
5953d8b9 | 509 | subst_len = udev_replace_whitespace(dest, dest, subst_len); |
e20a9171 | 510 | |
13cd553f YW |
511 | dest += subst_len; |
512 | size -= subst_len; | |
912541b0 | 513 | } |
065db052 | 514 | |
13cd553f | 515 | assert(size >= 1); |
f6caab89 YW |
516 | |
517 | if (ret_truncated) | |
518 | *ret_truncated = truncated; | |
519 | ||
1824300a | 520 | *dest = '\0'; |
13cd553f | 521 | return size; |
f1128767 KS |
522 | } |
523 | ||
f85cc54c | 524 | int udev_check_format(const char *value, size_t *offset, const char **hint) { |
d7aee41d | 525 | FormatSubstitutionType type; |
f85cc54c | 526 | const char *s = value; |
c8eaaf69 | 527 | char attr[UDEV_PATH_SIZE]; |
d7aee41d YW |
528 | int r; |
529 | ||
1824300a | 530 | while (*s) { |
d7aee41d | 531 | r = get_subst_type(&s, true, &type, attr); |
f85cc54c ZJS |
532 | if (r < 0) { |
533 | if (offset) | |
534 | *offset = s - value; | |
535 | if (hint) | |
536 | *hint = "invalid substitution type"; | |
d7aee41d | 537 | return r; |
f85cc54c | 538 | } else if (r == 0) { |
d7aee41d YW |
539 | s++; |
540 | continue; | |
541 | } | |
542 | ||
f85cc54c ZJS |
543 | if (IN_SET(type, FORMAT_SUBST_ATTR, FORMAT_SUBST_ENV) && isempty(attr)) { |
544 | if (offset) | |
545 | *offset = s - value; | |
546 | if (hint) | |
547 | *hint = "attribute value missing"; | |
d7aee41d | 548 | return -EINVAL; |
f85cc54c | 549 | } |
d7aee41d YW |
550 | |
551 | if (type == FORMAT_SUBST_RESULT && !isempty(attr)) { | |
552 | unsigned i; | |
553 | ||
554 | r = safe_atou_optional_plus(attr, &i); | |
f85cc54c ZJS |
555 | if (r < 0) { |
556 | if (offset) | |
557 | *offset = s - value; | |
558 | if (hint) | |
559 | *hint = "attribute value not a valid number"; | |
d7aee41d | 560 | return r; |
f85cc54c | 561 | } |
d7aee41d YW |
562 | } |
563 | } | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
e81c3a4c | 568 | static int on_spawn_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
99534007 | 569 | Spawn *spawn = ASSERT_PTR(userdata); |
e81c3a4c YW |
570 | char buf[4096], *p; |
571 | size_t size; | |
572 | ssize_t l; | |
9f537ae3 | 573 | int r; |
912541b0 | 574 | |
e81c3a4c YW |
575 | assert(fd == spawn->fd_stdout || fd == spawn->fd_stderr); |
576 | assert(!spawn->result || spawn->result_len < spawn->result_size); | |
577 | ||
578 | if (fd == spawn->fd_stdout && spawn->result) { | |
579 | p = spawn->result + spawn->result_len; | |
580 | size = spawn->result_size - spawn->result_len; | |
581 | } else { | |
582 | p = buf; | |
583 | size = sizeof(buf); | |
912541b0 KS |
584 | } |
585 | ||
7056adbf | 586 | l = read(fd, p, size - (p == buf)); |
e81c3a4c | 587 | if (l < 0) { |
9f537ae3 PD |
588 | if (errno == EAGAIN) |
589 | goto reenable; | |
590 | ||
591 | log_device_error_errno(spawn->device, errno, | |
592 | "Failed to read stdout of '%s': %m", spawn->cmd); | |
912541b0 | 593 | |
e81c3a4c | 594 | return 0; |
912541b0 KS |
595 | } |
596 | ||
7056adbf YW |
597 | if ((size_t) l == size) { |
598 | log_device_warning(spawn->device, "Truncating stdout of '%s' up to %zu byte.", | |
599 | spawn->cmd, spawn->result_size); | |
600 | l--; | |
6b6e471a | 601 | spawn->truncated = true; |
7056adbf YW |
602 | } |
603 | ||
e81c3a4c YW |
604 | p[l] = '\0'; |
605 | if (fd == spawn->fd_stdout && spawn->result) | |
606 | spawn->result_len += l; | |
912541b0 | 607 | |
e81c3a4c YW |
608 | /* Log output only if we watch stderr. */ |
609 | if (l > 0 && spawn->fd_stderr >= 0) { | |
610 | _cleanup_strv_free_ char **v = NULL; | |
912541b0 | 611 | |
daceb818 YW |
612 | r = strv_split_newlines_full(&v, p, EXTRACT_RETAIN_ESCAPE); |
613 | if (r < 0) | |
614 | log_device_debug(spawn->device, | |
615 | "Failed to split output from '%s'(%s), ignoring: %m", | |
616 | spawn->cmd, fd == spawn->fd_stdout ? "out" : "err"); | |
912541b0 | 617 | |
e81c3a4c | 618 | STRV_FOREACH(q, v) |
88d566aa YW |
619 | log_device_debug(spawn->device, "'%s'(%s) '%s'", spawn->cmd, |
620 | fd == spawn->fd_stdout ? "out" : "err", *q); | |
912541b0 KS |
621 | } |
622 | ||
6b6e471a | 623 | if (l == 0 || spawn->truncated) |
9f537ae3 PD |
624 | return 0; |
625 | ||
9f537ae3 | 626 | reenable: |
2be0218a YW |
627 | /* Re-enable the event source if we did not encounter EOF */ |
628 | ||
9f537ae3 PD |
629 | r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); |
630 | if (r < 0) | |
631 | log_device_error_errno(spawn->device, r, | |
632 | "Failed to reactivate IO source of '%s'", spawn->cmd); | |
e81c3a4c | 633 | return 0; |
2181d30a KS |
634 | } |
635 | ||
8128f229 | 636 | static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
99534007 | 637 | Spawn *spawn = ASSERT_PTR(userdata); |
912541b0 | 638 | |
b428efa5 MS |
639 | DEVICE_TRACE_POINT(spawn_timeout, spawn->device, spawn->cmd); |
640 | ||
e2099267 | 641 | kill_and_sigcont(spawn->pid, spawn->timeout_signal); |
912541b0 | 642 | |
88d566aa YW |
643 | log_device_error(spawn->device, "Spawned process '%s' ["PID_FMT"] timed out after %s, killing", |
644 | spawn->cmd, spawn->pid, | |
5291f26d | 645 | FORMAT_TIMESPAN(spawn->timeout_usec, USEC_PER_SEC)); |
912541b0 | 646 | |
8128f229 TG |
647 | return 1; |
648 | } | |
67117413 | 649 | |
8128f229 | 650 | static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { |
99534007 | 651 | Spawn *spawn = ASSERT_PTR(userdata); |
67117413 | 652 | |
88d566aa YW |
653 | log_device_warning(spawn->device, "Spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", |
654 | spawn->cmd, spawn->pid, | |
5291f26d | 655 | FORMAT_TIMESPAN(spawn->timeout_warn_usec, USEC_PER_SEC)); |
8128f229 TG |
656 | |
657 | return 1; | |
658 | } | |
659 | ||
660 | static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
99534007 | 661 | Spawn *spawn = ASSERT_PTR(userdata); |
a7521142 | 662 | int ret = -EIO; |
8128f229 | 663 | |
8128f229 TG |
664 | switch (si->si_code) { |
665 | case CLD_EXITED: | |
a7521142 | 666 | if (si->si_status == 0) |
88d566aa | 667 | log_device_debug(spawn->device, "Process '%s' succeeded.", spawn->cmd); |
a7521142 | 668 | else |
ab54f12b | 669 | log_device_full(spawn->device, spawn->accept_failure ? LOG_DEBUG : LOG_WARNING, |
88d566aa | 670 | "Process '%s' failed with exit code %i.", spawn->cmd, si->si_status); |
a7521142 | 671 | ret = si->si_status; |
8128f229 TG |
672 | break; |
673 | case CLD_KILLED: | |
674 | case CLD_DUMPED: | |
88d566aa | 675 | log_device_error(spawn->device, "Process '%s' terminated by signal %s.", spawn->cmd, signal_to_string(si->si_status)); |
8128f229 TG |
676 | break; |
677 | default: | |
88d566aa | 678 | log_device_error(spawn->device, "Process '%s' failed due to unknown reason.", spawn->cmd); |
8128f229 | 679 | } |
912541b0 | 680 | |
b428efa5 MS |
681 | DEVICE_TRACE_POINT(spawn_exit, spawn->device, spawn->cmd); |
682 | ||
a7521142 | 683 | sd_event_exit(sd_event_source_get_event(s), ret); |
8128f229 TG |
684 | return 1; |
685 | } | |
686 | ||
e81c3a4c | 687 | static int spawn_wait(Spawn *spawn) { |
4afd3348 | 688 | _cleanup_(sd_event_unrefp) sd_event *e = NULL; |
9612da36 YW |
689 | _cleanup_(sd_event_source_disable_unrefp) sd_event_source *sigchld_source = NULL; |
690 | _cleanup_(sd_event_source_disable_unrefp) sd_event_source *stdout_source = NULL; | |
691 | _cleanup_(sd_event_source_disable_unrefp) sd_event_source *stderr_source = NULL; | |
a7521142 | 692 | int r; |
8128f229 | 693 | |
e81c3a4c YW |
694 | assert(spawn); |
695 | ||
8128f229 TG |
696 | r = sd_event_new(&e); |
697 | if (r < 0) | |
90d260d8 | 698 | return log_device_debug_errno(spawn->device, r, "Failed to allocate sd-event object: %m"); |
8128f229 | 699 | |
e81c3a4c | 700 | if (spawn->timeout_usec > 0) { |
8128f229 TG |
701 | usec_t usec, age_usec; |
702 | ||
3285baa8 | 703 | usec = now(CLOCK_MONOTONIC); |
e81c3a4c YW |
704 | age_usec = usec - spawn->event_birth_usec; |
705 | if (age_usec < spawn->timeout_usec) { | |
706 | if (spawn->timeout_warn_usec > 0 && | |
707 | spawn->timeout_warn_usec < spawn->timeout_usec && | |
708 | spawn->timeout_warn_usec > age_usec) { | |
709 | spawn->timeout_warn_usec -= age_usec; | |
8128f229 | 710 | |
3285baa8 | 711 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c YW |
712 | usec + spawn->timeout_warn_usec, USEC_PER_SEC, |
713 | on_spawn_timeout_warning, spawn); | |
8128f229 | 714 | if (r < 0) |
90d260d8 | 715 | return log_device_debug_errno(spawn->device, r, "Failed to create timeout warning event source: %m"); |
912541b0 | 716 | } |
8128f229 | 717 | |
e81c3a4c | 718 | spawn->timeout_usec -= age_usec; |
8128f229 | 719 | |
3285baa8 | 720 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c | 721 | usec + spawn->timeout_usec, USEC_PER_SEC, on_spawn_timeout, spawn); |
8128f229 | 722 | if (r < 0) |
90d260d8 | 723 | return log_device_debug_errno(spawn->device, r, "Failed to create timeout event source: %m"); |
912541b0 KS |
724 | } |
725 | } | |
8128f229 | 726 | |
adeb26c1 | 727 | if (spawn->fd_stdout >= 0) { |
9f537ae3 PD |
728 | r = sd_event_add_io(e, &stdout_source, spawn->fd_stdout, EPOLLIN, on_spawn_io, spawn); |
729 | if (r < 0) | |
90d260d8 | 730 | return log_device_debug_errno(spawn->device, r, "Failed to create stdio event source: %m"); |
9f537ae3 | 731 | r = sd_event_source_set_enabled(stdout_source, SD_EVENT_ONESHOT); |
adeb26c1 | 732 | if (r < 0) |
90d260d8 | 733 | return log_device_debug_errno(spawn->device, r, "Failed to enable stdio event source: %m"); |
adeb26c1 | 734 | } |
e81c3a4c | 735 | |
adeb26c1 | 736 | if (spawn->fd_stderr >= 0) { |
9f537ae3 PD |
737 | r = sd_event_add_io(e, &stderr_source, spawn->fd_stderr, EPOLLIN, on_spawn_io, spawn); |
738 | if (r < 0) | |
90d260d8 | 739 | return log_device_debug_errno(spawn->device, r, "Failed to create stderr event source: %m"); |
9f537ae3 | 740 | r = sd_event_source_set_enabled(stderr_source, SD_EVENT_ONESHOT); |
adeb26c1 | 741 | if (r < 0) |
90d260d8 | 742 | return log_device_debug_errno(spawn->device, r, "Failed to enable stderr event source: %m"); |
adeb26c1 | 743 | } |
e81c3a4c | 744 | |
9f537ae3 | 745 | r = sd_event_add_child(e, &sigchld_source, spawn->pid, WEXITED, on_spawn_sigchld, spawn); |
8128f229 | 746 | if (r < 0) |
90d260d8 | 747 | return log_device_debug_errno(spawn->device, r, "Failed to create sigchild event source: %m"); |
9f537ae3 PD |
748 | /* SIGCHLD should be processed after IO is complete */ |
749 | r = sd_event_source_set_priority(sigchld_source, SD_EVENT_PRIORITY_NORMAL + 1); | |
750 | if (r < 0) | |
90d260d8 | 751 | return log_device_debug_errno(spawn->device, r, "Failed to set priority to sigchild event source: %m"); |
9f537ae3 | 752 | |
a7521142 | 753 | return sd_event_loop(e); |
2181d30a KS |
754 | } |
755 | ||
6b6e471a YW |
756 | int udev_event_spawn( |
757 | UdevEvent *event, | |
758 | usec_t timeout_usec, | |
759 | int timeout_signal, | |
760 | bool accept_failure, | |
761 | const char *cmd, | |
762 | char *result, | |
763 | size_t ressize, | |
764 | bool *ret_truncated) { | |
765 | ||
19ee48a6 | 766 | _cleanup_close_pair_ int outpipe[2] = PIPE_EBADF, errpipe[2] = PIPE_EBADF; |
feaa6db7 | 767 | _cleanup_strv_free_ char **argv = NULL; |
947ce772 | 768 | char **envp = NULL; |
e81c3a4c | 769 | Spawn spawn; |
912541b0 | 770 | pid_t pid; |
feaa6db7 | 771 | int r; |
912541b0 | 772 | |
dc8aec36 YW |
773 | assert(event); |
774 | assert(event->dev); | |
e81c3a4c YW |
775 | assert(result || ressize == 0); |
776 | ||
912541b0 | 777 | /* pipes from child to parent */ |
2e48548f | 778 | if (result || log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 779 | if (pipe2(outpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
88d566aa YW |
780 | return log_device_error_errno(event->dev, errno, |
781 | "Failed to create pipe for command '%s': %m", cmd); | |
912541b0 | 782 | |
feaa6db7 | 783 | if (log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 784 | if (pipe2(errpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
88d566aa YW |
785 | return log_device_error_errno(event->dev, errno, |
786 | "Failed to create pipe for command '%s': %m", cmd); | |
feaa6db7 | 787 | |
90e30d76 | 788 | r = strv_split_full(&argv, cmd, NULL, EXTRACT_UNQUOTE | EXTRACT_RELAX | EXTRACT_RETAIN_ESCAPE); |
0645b83a ZJS |
789 | if (r < 0) |
790 | return log_device_error_errno(event->dev, r, "Failed to split command: %m"); | |
feaa6db7 | 791 | |
baaa35ad | 792 | if (isempty(argv[0])) |
88d566aa YW |
793 | return log_device_error_errno(event->dev, SYNTHETIC_ERRNO(EINVAL), |
794 | "Invalid command '%s'", cmd); | |
dc8aec36 | 795 | |
feaa6db7 YW |
796 | /* allow programs in /usr/lib/udev/ to be called without the path */ |
797 | if (!path_is_absolute(argv[0])) { | |
798 | char *program; | |
799 | ||
62a85ee0 | 800 | program = path_join(UDEVLIBEXECDIR, argv[0]); |
feaa6db7 YW |
801 | if (!program) |
802 | return log_oom(); | |
bbf35206 | 803 | |
feaa6db7 YW |
804 | free_and_replace(argv[0], program); |
805 | } | |
806 | ||
cf28ad46 | 807 | r = device_get_properties_strv(event->dev, &envp); |
947ce772 | 808 | if (r < 0) |
cf28ad46 | 809 | return log_device_error_errno(event->dev, r, "Failed to get device properties"); |
947ce772 | 810 | |
88d566aa | 811 | log_device_debug(event->dev, "Starting '%s'", cmd); |
3ad4d482 | 812 | |
0c2aedb4 YW |
813 | r = safe_fork_full("(spawn)", |
814 | (int[]) { -EBADF, outpipe[WRITE_END], errpipe[WRITE_END] }, | |
815 | NULL, 0, | |
816 | FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_REARRANGE_STDIO|FORK_LOG|FORK_RLIMIT_NOFILE_SAFE, | |
817 | &pid); | |
feaa6db7 | 818 | if (r < 0) |
88d566aa YW |
819 | return log_device_error_errno(event->dev, r, |
820 | "Failed to fork() to execute command '%s': %m", cmd); | |
feaa6db7 | 821 | if (r == 0) { |
b428efa5 | 822 | DEVICE_TRACE_POINT(spawn_exec, event->dev, cmd); |
947ce772 | 823 | execve(argv[0], argv, envp); |
84b1ccb9 | 824 | _exit(EXIT_FAILURE); |
bbf35206 | 825 | } |
912541b0 | 826 | |
4c253ed1 LP |
827 | /* parent closed child's ends of pipes */ |
828 | outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]); | |
829 | errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]); | |
912541b0 | 830 | |
e81c3a4c | 831 | spawn = (Spawn) { |
88d566aa | 832 | .device = event->dev, |
e81c3a4c YW |
833 | .cmd = cmd, |
834 | .pid = pid, | |
835 | .accept_failure = accept_failure, | |
66f737b4 | 836 | .timeout_warn_usec = udev_warn_timeout(timeout_usec), |
e81c3a4c | 837 | .timeout_usec = timeout_usec, |
e2099267 | 838 | .timeout_signal = timeout_signal, |
e81c3a4c YW |
839 | .event_birth_usec = event->birth_usec, |
840 | .fd_stdout = outpipe[READ_END], | |
841 | .fd_stderr = errpipe[READ_END], | |
842 | .result = result, | |
843 | .result_size = ressize, | |
844 | }; | |
845 | r = spawn_wait(&spawn); | |
feaa6db7 | 846 | if (r < 0) |
88d566aa YW |
847 | return log_device_error_errno(event->dev, r, |
848 | "Failed to wait for spawned command '%s': %m", cmd); | |
2181d30a | 849 | |
e81c3a4c YW |
850 | if (result) |
851 | result[spawn.result_len] = '\0'; | |
852 | ||
6b6e471a YW |
853 | if (ret_truncated) |
854 | *ret_truncated = spawn.truncated; | |
855 | ||
a7521142 | 856 | return r; /* 0 for success, and positive if the program failed */ |
2181d30a KS |
857 | } |
858 | ||
ff88b949 YW |
859 | static int device_rename(sd_device *device, const char *name) { |
860 | _cleanup_free_ char *new_syspath = NULL; | |
861 | const char *s; | |
862 | int r; | |
863 | ||
864 | assert(device); | |
865 | assert(name); | |
866 | ||
867 | if (!filename_is_valid(name)) | |
868 | return -EINVAL; | |
869 | ||
870 | r = sd_device_get_syspath(device, &s); | |
871 | if (r < 0) | |
872 | return r; | |
873 | ||
874 | r = path_extract_directory(s, &new_syspath); | |
875 | if (r < 0) | |
876 | return r; | |
877 | ||
878 | if (!path_extend(&new_syspath, name)) | |
879 | return -ENOMEM; | |
880 | ||
881 | if (!path_is_safe(new_syspath)) | |
882 | return -EINVAL; | |
883 | ||
884 | /* At the time this is called, the renamed device may not exist yet. Hence, we cannot validate | |
885 | * the new syspath. */ | |
886 | r = device_set_syspath(device, new_syspath, /* verify = */ false); | |
887 | if (r < 0) | |
888 | return r; | |
889 | ||
890 | r = sd_device_get_property_value(device, "INTERFACE", &s); | |
891 | if (r == -ENOENT) | |
892 | return 0; | |
893 | if (r < 0) | |
894 | return r; | |
895 | ||
896 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ | |
897 | r = device_add_property_internal(device, "INTERFACE_OLD", s); | |
898 | if (r < 0) | |
899 | return r; | |
900 | ||
901 | return device_add_property_internal(device, "INTERFACE", name); | |
902 | } | |
903 | ||
2e088715 | 904 | static int rename_netif(UdevEvent *event) { |
21003384 YW |
905 | _cleanup_free_ char *old_syspath = NULL, *old_sysname = NULL; |
906 | const char *s; | |
60e50fb2 | 907 | sd_device *dev; |
2740750d YW |
908 | int ifindex, r; |
909 | ||
60e50fb2 YW |
910 | assert(event); |
911 | ||
2740750d YW |
912 | if (!event->name) |
913 | return 0; /* No new name is requested. */ | |
914 | ||
60e50fb2 YW |
915 | dev = ASSERT_PTR(event->dev); |
916 | ||
a1130022 | 917 | if (!device_for_action(dev, SD_DEVICE_ADD)) |
2740750d | 918 | return 0; /* Rename the interface only when it is added. */ |
16d26d55 | 919 | |
2740750d YW |
920 | r = sd_device_get_ifindex(dev, &ifindex); |
921 | if (r == -ENOENT) | |
922 | return 0; /* Device is not a network interface. */ | |
923 | if (r < 0) | |
21003384 | 924 | return log_device_warning_errno(dev, r, "Failed to get ifindex: %m"); |
912541b0 | 925 | |
068b0f77 YW |
926 | if (naming_scheme_has(NAMING_REPLACE_STRICTLY) && |
927 | !ifname_valid(event->name)) { | |
928 | log_device_warning(dev, "Invalid network interface name, ignoring: %s", event->name); | |
929 | return 0; | |
930 | } | |
931 | ||
21003384 | 932 | r = sd_device_get_sysname(dev, &s); |
a4055a60 | 933 | if (r < 0) |
21003384 | 934 | return log_device_warning_errno(dev, r, "Failed to get sysname: %m"); |
912541b0 | 935 | |
21003384 YW |
936 | if (streq(event->name, s)) |
937 | return 0; /* The interface name is already requested name. */ | |
938 | ||
939 | old_sysname = strdup(s); | |
940 | if (!old_sysname) | |
941 | return -ENOMEM; | |
942 | ||
943 | r = sd_device_get_syspath(dev, &s); | |
f647962d | 944 | if (r < 0) |
21003384 YW |
945 | return log_device_warning_errno(dev, r, "Failed to get syspath: %m"); |
946 | ||
947 | old_syspath = strdup(s); | |
948 | if (!old_syspath) | |
949 | return -ENOMEM; | |
950 | ||
951 | r = device_rename(dev, event->name); | |
952 | if (r < 0) { | |
953 | log_device_warning_errno(dev, r, "Failed to update properties with new name '%s': %m", event->name); | |
954 | goto revert; | |
955 | } | |
956 | ||
957 | /* Set ID_RENAMING boolean property here. It will be dropped when the corresponding move uevent is processed. */ | |
958 | r = device_add_property(dev, "ID_RENAMING", "1"); | |
959 | if (r < 0) { | |
960 | log_device_warning_errno(dev, r, "Failed to add 'ID_RENAMING' property: %m"); | |
961 | goto revert; | |
962 | } | |
16d26d55 | 963 | |
ae353ec2 YW |
964 | /* Also set ID_RENAMING boolean property to cloned sd_device object and save it to database |
965 | * before calling rtnl_set_link_name(). Otherwise, clients (e.g., systemd-networkd) may receive | |
966 | * RTM_NEWLINK netlink message before the database is updated. */ | |
967 | r = device_add_property(event->dev_db_clone, "ID_RENAMING", "1"); | |
21003384 YW |
968 | if (r < 0) { |
969 | log_device_warning_errno(event->dev_db_clone, r, "Failed to add 'ID_RENAMING' property: %m"); | |
970 | goto revert; | |
971 | } | |
ae353ec2 YW |
972 | |
973 | r = device_update_db(event->dev_db_clone); | |
21003384 YW |
974 | if (r < 0) { |
975 | log_device_debug_errno(event->dev_db_clone, r, "Failed to update database under /run/udev/data/: %m"); | |
976 | goto revert; | |
977 | } | |
ae353ec2 YW |
978 | |
979 | r = rtnl_set_link_name(&event->rtnl, ifindex, event->name); | |
21003384 YW |
980 | if (r < 0) { |
981 | if (r == -EBUSY) { | |
982 | log_device_info(dev, "Network interface '%s' is already up, cannot rename to '%s'.", | |
983 | old_sysname, event->name); | |
984 | r = 0; | |
985 | } else | |
986 | log_device_error_errno(dev, r, "Failed to rename network interface %i from '%s' to '%s': %m", | |
987 | ifindex, old_sysname, event->name); | |
988 | goto revert; | |
53584e7b | 989 | } |
16d26d55 | 990 | |
21003384 | 991 | log_device_debug(dev, "Network interface %i is renamed from '%s' to '%s'", ifindex, old_sysname, event->name); |
2740750d | 992 | return 1; |
21003384 YW |
993 | |
994 | revert: | |
995 | /* Restore 'dev_db_clone' */ | |
996 | (void) device_add_property(event->dev_db_clone, "ID_RENAMING", NULL); | |
997 | (void) device_update_db(event->dev_db_clone); | |
998 | ||
999 | /* Restore 'dev' */ | |
1000 | (void) device_set_syspath(dev, old_syspath, /* verify = */ false); | |
1001 | if (sd_device_get_property_value(dev, "INTERFACE_OLD", &s) >= 0) { | |
1002 | (void) device_add_property_internal(dev, "INTERFACE", s); | |
1003 | (void) device_add_property_internal(dev, "INTERFACE_OLD", NULL); | |
1004 | } | |
1005 | (void) device_add_property(dev, "ID_RENAMING", NULL); | |
1006 | ||
1007 | return r; | |
d46f37fd KS |
1008 | } |
1009 | ||
2e088715 | 1010 | static int update_devnode(UdevEvent *event) { |
fbd747a4 | 1011 | sd_device *dev = ASSERT_PTR(ASSERT_PTR(event)->dev); |
e52eaf56 YW |
1012 | int r; |
1013 | ||
7af1c780 | 1014 | r = sd_device_get_devnum(dev, NULL); |
e52eaf56 YW |
1015 | if (r == -ENOENT) |
1016 | return 0; | |
1017 | if (r < 0) | |
1018 | return log_device_error_errno(dev, r, "Failed to get devnum: %m"); | |
1019 | ||
25de7aa7 | 1020 | if (!uid_is_valid(event->uid)) { |
e52eaf56 | 1021 | r = device_get_devnode_uid(dev, &event->uid); |
3708c0f4 | 1022 | if (r < 0 && r != -ENOENT) |
e52eaf56 YW |
1023 | return log_device_error_errno(dev, r, "Failed to get devnode UID: %m"); |
1024 | } | |
1025 | ||
25de7aa7 | 1026 | if (!gid_is_valid(event->gid)) { |
e52eaf56 | 1027 | r = device_get_devnode_gid(dev, &event->gid); |
3708c0f4 | 1028 | if (r < 0 && r != -ENOENT) |
e52eaf56 YW |
1029 | return log_device_error_errno(dev, r, "Failed to get devnode GID: %m"); |
1030 | } | |
1031 | ||
25de7aa7 | 1032 | if (event->mode == MODE_INVALID) { |
e52eaf56 YW |
1033 | r = device_get_devnode_mode(dev, &event->mode); |
1034 | if (r < 0 && r != -ENOENT) | |
1035 | return log_device_error_errno(dev, r, "Failed to get devnode mode: %m"); | |
e52eaf56 | 1036 | } |
3708c0f4 | 1037 | |
a1130022 | 1038 | bool apply_mac = device_for_action(dev, SD_DEVICE_ADD); |
e52eaf56 | 1039 | |
2f48561e YW |
1040 | r = udev_node_apply_permissions(dev, apply_mac, event->mode, event->uid, event->gid, event->seclabel_list); |
1041 | if (r < 0) | |
1042 | return log_device_error_errno(dev, r, "Failed to apply devnode permissions: %m"); | |
1043 | ||
1044 | return udev_node_update(dev, event->dev_db_clone); | |
e52eaf56 YW |
1045 | } |
1046 | ||
4cac2260 | 1047 | static int event_execute_rules_on_remove( |
2e088715 | 1048 | UdevEvent *event, |
df7ee959 | 1049 | int inotify_fd, |
66f737b4 | 1050 | usec_t timeout_usec, |
e2099267 | 1051 | int timeout_signal, |
eb1f9e30 | 1052 | Hashmap *properties_list, |
9a07157d | 1053 | UdevRules *rules) { |
912541b0 | 1054 | |
fbd747a4 | 1055 | sd_device *dev = ASSERT_PTR(ASSERT_PTR(event)->dev); |
eb1f9e30 | 1056 | int r; |
912541b0 | 1057 | |
ebcc52fa | 1058 | r = device_read_db_internal(dev, true); |
eb1f9e30 YW |
1059 | if (r < 0) |
1060 | log_device_debug_errno(dev, r, "Failed to read database under /run/udev/data/: %m"); | |
107f2e25 | 1061 | |
eb1f9e30 YW |
1062 | r = device_tag_index(dev, NULL, false); |
1063 | if (r < 0) | |
1064 | log_device_debug_errno(dev, r, "Failed to remove corresponding tag files under /run/udev/tag/, ignoring: %m"); | |
912541b0 | 1065 | |
eb1f9e30 YW |
1066 | r = device_delete_db(dev); |
1067 | if (r < 0) | |
1068 | log_device_debug_errno(dev, r, "Failed to delete database under /run/udev/data/, ignoring: %m"); | |
912541b0 | 1069 | |
790da548 YW |
1070 | r = udev_watch_end(inotify_fd, dev); |
1071 | if (r < 0) | |
1072 | log_device_warning_errno(dev, r, "Failed to remove inotify watch, ignoring: %m"); | |
eb1f9e30 | 1073 | |
4cac2260 | 1074 | r = udev_rules_apply_to_event(rules, event, timeout_usec, timeout_signal, properties_list); |
eb1f9e30 | 1075 | |
d4a95a95 | 1076 | if (sd_device_get_devnum(dev, NULL) >= 0) |
eb1f9e30 | 1077 | (void) udev_node_remove(dev); |
4cac2260 YW |
1078 | |
1079 | return r; | |
eb1f9e30 YW |
1080 | } |
1081 | ||
e77b146f LP |
1082 | static int copy_all_tags(sd_device *d, sd_device *s) { |
1083 | const char *tag; | |
1084 | int r; | |
1085 | ||
1086 | assert(d); | |
1087 | ||
1088 | if (!s) | |
1089 | return 0; | |
1090 | ||
5b90b906 | 1091 | FOREACH_DEVICE_TAG(s, tag) { |
e77b146f LP |
1092 | r = device_add_tag(d, tag, false); |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | } | |
1096 | ||
1097 | return 0; | |
1098 | } | |
1099 | ||
df7ee959 YW |
1100 | int udev_event_execute_rules( |
1101 | UdevEvent *event, | |
1102 | int inotify_fd, /* This may be negative */ | |
1103 | usec_t timeout_usec, | |
1104 | int timeout_signal, | |
1105 | Hashmap *properties_list, | |
1106 | UdevRules *rules) { | |
1107 | ||
a1130022 | 1108 | sd_device_action_t action; |
6d0fdf45 | 1109 | sd_device *dev; |
eb1f9e30 YW |
1110 | int r; |
1111 | ||
28235d10 | 1112 | dev = ASSERT_PTR(ASSERT_PTR(event)->dev); |
eb1f9e30 YW |
1113 | assert(rules); |
1114 | ||
a1130022 | 1115 | r = sd_device_get_action(dev, &action); |
eb1f9e30 | 1116 | if (r < 0) |
d4d690fa | 1117 | return log_device_error_errno(dev, r, "Failed to get ACTION: %m"); |
b081b27e | 1118 | |
4cac2260 YW |
1119 | if (action == SD_DEVICE_REMOVE) |
1120 | return event_execute_rules_on_remove(event, inotify_fd, timeout_usec, timeout_signal, properties_list, rules); | |
912541b0 | 1121 | |
e7f781e4 | 1122 | /* Disable watch during event processing. */ |
28235d10 | 1123 | r = udev_watch_end(inotify_fd, dev); |
790da548 YW |
1124 | if (r < 0) |
1125 | log_device_warning_errno(dev, r, "Failed to remove inotify watch, ignoring: %m"); | |
e7f781e4 | 1126 | |
480ecb7d | 1127 | r = device_clone_with_db(dev, &event->dev_db_clone); |
eb1f9e30 | 1128 | if (r < 0) |
99058cd6 | 1129 | return log_device_debug_errno(dev, r, "Failed to clone sd_device object: %m"); |
912541b0 | 1130 | |
e77b146f LP |
1131 | r = copy_all_tags(dev, event->dev_db_clone); |
1132 | if (r < 0) | |
1133 | log_device_warning_errno(dev, r, "Failed to copy all tags from old database entry, ignoring: %m"); | |
1134 | ||
7137f2f3 YW |
1135 | /* Drop previously added property for safety to make IMPORT{db}="ID_RENAMING" not work. This is |
1136 | * mostly for 'move' uevent, but let's do unconditionally. Why? If a network interface is renamed in | |
1137 | * initrd, then udevd may lose the 'move' uevent during switching root. Usually, we do not set the | |
1138 | * persistent flag for network interfaces, but user may set it. Just for safety. */ | |
1139 | r = device_add_property(event->dev_db_clone, "ID_RENAMING", NULL); | |
1140 | if (r < 0) | |
1141 | return log_device_debug_errno(dev, r, "Failed to remove 'ID_RENAMING' property: %m"); | |
eb1f9e30 | 1142 | |
b428efa5 MS |
1143 | DEVICE_TRACE_POINT(rules_start, dev); |
1144 | ||
e2099267 | 1145 | r = udev_rules_apply_to_event(rules, event, timeout_usec, timeout_signal, properties_list); |
99058cd6 YW |
1146 | if (r < 0) |
1147 | return log_device_debug_errno(dev, r, "Failed to apply udev rules: %m"); | |
eb1f9e30 | 1148 | |
b428efa5 MS |
1149 | DEVICE_TRACE_POINT(rules_finished, dev); |
1150 | ||
99058cd6 YW |
1151 | r = rename_netif(event); |
1152 | if (r < 0) | |
1153 | return r; | |
1154 | ||
1155 | r = update_devnode(event); | |
1156 | if (r < 0) | |
1157 | return r; | |
eb1f9e30 YW |
1158 | |
1159 | /* preserve old, or get new initialization timestamp */ | |
480ecb7d | 1160 | r = device_ensure_usec_initialized(dev, event->dev_db_clone); |
eb1f9e30 | 1161 | if (r < 0) |
99058cd6 | 1162 | return log_device_debug_errno(dev, r, "Failed to set initialization timestamp: %m"); |
eb1f9e30 YW |
1163 | |
1164 | /* (re)write database file */ | |
480ecb7d | 1165 | r = device_tag_index(dev, event->dev_db_clone, true); |
eb1f9e30 | 1166 | if (r < 0) |
99058cd6 | 1167 | return log_device_debug_errno(dev, r, "Failed to update tags under /run/udev/tag/: %m"); |
eb1f9e30 YW |
1168 | |
1169 | r = device_update_db(dev); | |
1170 | if (r < 0) | |
99058cd6 | 1171 | return log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/: %m"); |
eb1f9e30 | 1172 | |
996c8390 MS |
1173 | device_set_is_initialized(dev); |
1174 | ||
7920d0a1 | 1175 | return 0; |
d46f37fd | 1176 | } |
2d73813e | 1177 | |
e2099267 | 1178 | void udev_event_execute_run(UdevEvent *event, usec_t timeout_usec, int timeout_signal) { |
1448820a | 1179 | const char *command; |
29448498 | 1180 | void *val; |
25de7aa7 | 1181 | int r; |
912541b0 | 1182 | |
90e74a66 | 1183 | ORDERED_HASHMAP_FOREACH_KEY(val, command, event->run_list) { |
25de7aa7 | 1184 | UdevBuiltinCommand builtin_cmd = PTR_TO_UDEV_BUILTIN_CMD(val); |
912541b0 | 1185 | |
25de7aa7 YW |
1186 | if (builtin_cmd != _UDEV_BUILTIN_INVALID) { |
1187 | log_device_debug(event->dev, "Running built-in command \"%s\"", command); | |
92232230 | 1188 | r = udev_builtin_run(event->dev, &event->rtnl, builtin_cmd, command, false); |
25de7aa7 YW |
1189 | if (r < 0) |
1190 | log_device_debug_errno(event->dev, r, "Failed to run built-in command \"%s\", ignoring: %m", command); | |
1191 | } else { | |
6b92f429 | 1192 | if (event->exec_delay_usec > 0) { |
25de7aa7 | 1193 | log_device_debug(event->dev, "Delaying execution of \"%s\" for %s.", |
5291f26d | 1194 | command, FORMAT_TIMESPAN(event->exec_delay_usec, USEC_PER_SEC)); |
6b92f429 | 1195 | (void) usleep(event->exec_delay_usec); |
912541b0 KS |
1196 | } |
1197 | ||
25de7aa7 | 1198 | log_device_debug(event->dev, "Running command \"%s\"", command); |
e2099267 | 1199 | |
6b6e471a | 1200 | r = udev_event_spawn(event, timeout_usec, timeout_signal, false, command, NULL, 0, NULL); |
08de1958 YW |
1201 | if (r < 0) |
1202 | log_device_warning_errno(event->dev, r, "Failed to execute '%s', ignoring: %m", command); | |
1203 | else if (r > 0) /* returned value is positive when program fails */ | |
25de7aa7 | 1204 | log_device_debug(event->dev, "Command \"%s\" returned %d (error), ignoring.", command, r); |
912541b0 KS |
1205 | } |
1206 | } | |
2d73813e | 1207 | } |