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Commit | Line | Data |
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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" |
947ce772 | 15 | #include "device-private.h" |
e9343893 | 16 | #include "device-util.h" |
3ffd4af2 | 17 | #include "fd-util.h" |
25de7aa7 | 18 | #include "fs-util.h" |
f97b34a6 | 19 | #include "format-util.h" |
068b0f77 | 20 | #include "netif-naming-scheme.h" |
07630cea | 21 | #include "netlink-util.h" |
ce4f94b8 | 22 | #include "parse-util.h" |
feaa6db7 | 23 | #include "path-util.h" |
8128f229 | 24 | #include "process-util.h" |
595225af | 25 | #include "rlimit-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" |
1c2ad7a6 | 33 | #include "udev-netlink.h" |
a2554ace | 34 | #include "udev-node.h" |
d4d690fa | 35 | #include "udev-util.h" |
70068602 | 36 | #include "udev-watch.h" |
25de7aa7 | 37 | #include "user-util.h" |
8128f229 TG |
38 | |
39 | typedef struct Spawn { | |
88d566aa | 40 | sd_device *device; |
8128f229 TG |
41 | const char *cmd; |
42 | pid_t pid; | |
e81c3a4c YW |
43 | usec_t timeout_warn_usec; |
44 | usec_t timeout_usec; | |
e2099267 | 45 | int timeout_signal; |
e81c3a4c | 46 | usec_t event_birth_usec; |
53318514 | 47 | bool accept_failure; |
e81c3a4c YW |
48 | int fd_stdout; |
49 | int fd_stderr; | |
50 | char *result; | |
51 | size_t result_size; | |
52 | size_t result_len; | |
6b6e471a | 53 | bool truncated; |
8128f229 | 54 | } Spawn; |
d46f37fd | 55 | |
1a0bd015 | 56 | UdevEvent *udev_event_new(sd_device *dev, usec_t exec_delay_usec, sd_netlink *rtnl, int log_level) { |
2e088715 | 57 | UdevEvent *event; |
912541b0 | 58 | |
89665d09 YW |
59 | assert(dev); |
60 | ||
2e088715 | 61 | event = new(UdevEvent, 1); |
89665d09 | 62 | if (!event) |
912541b0 | 63 | return NULL; |
89665d09 | 64 | |
2e088715 | 65 | *event = (UdevEvent) { |
cf28ad46 | 66 | .dev = sd_device_ref(dev), |
89665d09 | 67 | .birth_usec = now(CLOCK_MONOTONIC), |
6b92f429 | 68 | .exec_delay_usec = exec_delay_usec, |
e0bb2ff9 | 69 | .rtnl = sd_netlink_ref(rtnl), |
25de7aa7 YW |
70 | .uid = UID_INVALID, |
71 | .gid = GID_INVALID, | |
72 | .mode = MODE_INVALID, | |
1a0bd015 YW |
73 | .log_level_was_debug = log_level == LOG_DEBUG, |
74 | .default_log_level = log_level, | |
89665d09 YW |
75 | }; |
76 | ||
912541b0 | 77 | return event; |
aa8734ff KS |
78 | } |
79 | ||
2e088715 | 80 | UdevEvent *udev_event_free(UdevEvent *event) { |
c1118ceb YW |
81 | if (!event) |
82 | return NULL; | |
83 | ||
cf28ad46 | 84 | sd_device_unref(event->dev); |
480ecb7d | 85 | sd_device_unref(event->dev_db_clone); |
1c4baffc | 86 | sd_netlink_unref(event->rtnl); |
39a15c8a YW |
87 | ordered_hashmap_free_free_key(event->run_list); |
88 | ordered_hashmap_free_free_free(event->seclabel_list); | |
912541b0 KS |
89 | free(event->program_result); |
90 | free(event->name); | |
c1118ceb YW |
91 | |
92 | return mfree(event); | |
aa8734ff KS |
93 | } |
94 | ||
7e9c23dd YW |
95 | typedef enum { |
96 | FORMAT_SUBST_DEVNODE, | |
97 | FORMAT_SUBST_ATTR, | |
98 | FORMAT_SUBST_ENV, | |
99 | FORMAT_SUBST_KERNEL, | |
100 | FORMAT_SUBST_KERNEL_NUMBER, | |
101 | FORMAT_SUBST_DRIVER, | |
102 | FORMAT_SUBST_DEVPATH, | |
103 | FORMAT_SUBST_ID, | |
104 | FORMAT_SUBST_MAJOR, | |
105 | FORMAT_SUBST_MINOR, | |
106 | FORMAT_SUBST_RESULT, | |
107 | FORMAT_SUBST_PARENT, | |
108 | FORMAT_SUBST_NAME, | |
109 | FORMAT_SUBST_LINKS, | |
110 | FORMAT_SUBST_ROOT, | |
111 | FORMAT_SUBST_SYS, | |
112 | _FORMAT_SUBST_TYPE_MAX, | |
2d93c20e | 113 | _FORMAT_SUBST_TYPE_INVALID = -EINVAL, |
7e9c23dd | 114 | } FormatSubstitutionType; |
0d53705b | 115 | |
9204d802 YW |
116 | struct subst_map_entry { |
117 | const char *name; | |
118 | const char fmt; | |
7e9c23dd | 119 | FormatSubstitutionType type; |
9204d802 YW |
120 | }; |
121 | ||
122 | static const struct subst_map_entry map[] = { | |
7e9c23dd | 123 | { .name = "devnode", .fmt = 'N', .type = FORMAT_SUBST_DEVNODE }, |
3c209d60 | 124 | { .name = "tempnode", .fmt = 'N', .type = FORMAT_SUBST_DEVNODE }, /* deprecated */ |
7e9c23dd | 125 | { .name = "attr", .fmt = 's', .type = FORMAT_SUBST_ATTR }, |
3c209d60 | 126 | { .name = "sysfs", .fmt = 's', .type = FORMAT_SUBST_ATTR }, /* deprecated */ |
7e9c23dd YW |
127 | { .name = "env", .fmt = 'E', .type = FORMAT_SUBST_ENV }, |
128 | { .name = "kernel", .fmt = 'k', .type = FORMAT_SUBST_KERNEL }, | |
129 | { .name = "number", .fmt = 'n', .type = FORMAT_SUBST_KERNEL_NUMBER }, | |
130 | { .name = "driver", .fmt = 'd', .type = FORMAT_SUBST_DRIVER }, | |
131 | { .name = "devpath", .fmt = 'p', .type = FORMAT_SUBST_DEVPATH }, | |
132 | { .name = "id", .fmt = 'b', .type = FORMAT_SUBST_ID }, | |
133 | { .name = "major", .fmt = 'M', .type = FORMAT_SUBST_MAJOR }, | |
134 | { .name = "minor", .fmt = 'm', .type = FORMAT_SUBST_MINOR }, | |
135 | { .name = "result", .fmt = 'c', .type = FORMAT_SUBST_RESULT }, | |
136 | { .name = "parent", .fmt = 'P', .type = FORMAT_SUBST_PARENT }, | |
137 | { .name = "name", .fmt = 'D', .type = FORMAT_SUBST_NAME }, | |
138 | { .name = "links", .fmt = 'L', .type = FORMAT_SUBST_LINKS }, | |
139 | { .name = "root", .fmt = 'r', .type = FORMAT_SUBST_ROOT }, | |
140 | { .name = "sys", .fmt = 'S', .type = FORMAT_SUBST_SYS }, | |
9204d802 YW |
141 | }; |
142 | ||
13cd553f YW |
143 | static const char *format_type_to_string(FormatSubstitutionType t) { |
144 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
145 | if (map[i].type == t) | |
146 | return map[i].name; | |
147 | return NULL; | |
148 | } | |
149 | ||
150 | static char format_type_to_char(FormatSubstitutionType t) { | |
151 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
152 | if (map[i].type == t) | |
153 | return map[i].fmt; | |
154 | return '\0'; | |
155 | } | |
156 | ||
c8eaaf69 | 157 | static int get_subst_type(const char **str, bool strict, FormatSubstitutionType *ret_type, char ret_attr[static UDEV_PATH_SIZE]) { |
13cd553f YW |
158 | const char *p = *str, *q = NULL; |
159 | size_t i; | |
160 | ||
161 | assert(str); | |
162 | assert(*str); | |
163 | assert(ret_type); | |
2caa38e9 | 164 | assert(ret_attr); |
13cd553f | 165 | |
1824300a | 166 | if (*p == '$') { |
13cd553f | 167 | p++; |
1824300a | 168 | if (*p == '$') { |
13cd553f YW |
169 | *str = p; |
170 | return 0; | |
171 | } | |
172 | for (i = 0; i < ELEMENTSOF(map); i++) | |
173 | if ((q = startswith(p, map[i].name))) | |
174 | break; | |
1824300a | 175 | } else if (*p == '%') { |
13cd553f | 176 | p++; |
1824300a | 177 | if (*p == '%') { |
13cd553f YW |
178 | *str = p; |
179 | return 0; | |
180 | } | |
181 | ||
182 | for (i = 0; i < ELEMENTSOF(map); i++) | |
1824300a | 183 | if (*p == map[i].fmt) { |
13cd553f YW |
184 | q = p + 1; |
185 | break; | |
186 | } | |
d7aee41d | 187 | } else |
13cd553f | 188 | return 0; |
d7aee41d YW |
189 | if (!q) |
190 | /* When 'strict' flag is set, then '$' and '%' must be escaped. */ | |
191 | return strict ? -EINVAL : 0; | |
13cd553f | 192 | |
1824300a | 193 | if (*q == '{') { |
13cd553f YW |
194 | const char *start, *end; |
195 | size_t len; | |
196 | ||
197 | start = q + 1; | |
198 | end = strchr(start, '}'); | |
199 | if (!end) | |
200 | return -EINVAL; | |
201 | ||
202 | len = end - start; | |
c8eaaf69 | 203 | if (len == 0 || len >= UDEV_PATH_SIZE) |
13cd553f YW |
204 | return -EINVAL; |
205 | ||
c8eaaf69 | 206 | strnscpy(ret_attr, UDEV_PATH_SIZE, start, len); |
13cd553f YW |
207 | q = end + 1; |
208 | } else | |
1824300a | 209 | *ret_attr = '\0'; |
13cd553f YW |
210 | |
211 | *str = q; | |
212 | *ret_type = map[i].type; | |
213 | return 1; | |
214 | } | |
215 | ||
ce4f94b8 YW |
216 | static int safe_atou_optional_plus(const char *s, unsigned *ret) { |
217 | const char *p; | |
218 | int r; | |
219 | ||
220 | assert(s); | |
221 | assert(ret); | |
222 | ||
223 | /* Returns 1 if plus, 0 if no plus, negative on error */ | |
224 | ||
225 | p = endswith(s, "+"); | |
226 | if (p) | |
2f82562b | 227 | s = strndupa_safe(s, p - s); |
ce4f94b8 YW |
228 | |
229 | r = safe_atou(s, ret); | |
230 | if (r < 0) | |
231 | return r; | |
232 | ||
233 | return !!p; | |
234 | } | |
235 | ||
ef315ada YW |
236 | static ssize_t udev_event_subst_format( |
237 | UdevEvent *event, | |
238 | FormatSubstitutionType type, | |
239 | const char *attr, | |
240 | char *dest, | |
f6caab89 YW |
241 | size_t l, |
242 | bool *ret_truncated) { | |
243 | ||
cf28ad46 | 244 | sd_device *parent, *dev = event->dev; |
4cade7a1 | 245 | const char *val = NULL; |
f6caab89 | 246 | bool truncated = false; |
be452683 | 247 | char *s = dest; |
4cade7a1 | 248 | int r; |
0d53705b | 249 | |
ef315ada | 250 | switch (type) { |
7e9c23dd | 251 | case FORMAT_SUBST_DEVPATH: |
4cade7a1 YW |
252 | r = sd_device_get_devpath(dev, &val); |
253 | if (r < 0) | |
254 | return r; | |
f6caab89 | 255 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 256 | break; |
7e9c23dd | 257 | case FORMAT_SUBST_KERNEL: |
4cade7a1 YW |
258 | r = sd_device_get_sysname(dev, &val); |
259 | if (r < 0) | |
260 | return r; | |
f6caab89 | 261 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 262 | break; |
7e9c23dd | 263 | case FORMAT_SUBST_KERNEL_NUMBER: |
4cade7a1 | 264 | r = sd_device_get_sysnum(dev, &val); |
380d1901 YW |
265 | if (r == -ENOENT) |
266 | goto null_terminate; | |
4cade7a1 | 267 | if (r < 0) |
380d1901 | 268 | return r; |
f6caab89 | 269 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 270 | break; |
7e9c23dd | 271 | case FORMAT_SUBST_ID: |
4cade7a1 | 272 | if (!event->dev_parent) |
380d1901 | 273 | goto null_terminate; |
f3d241fe | 274 | r = sd_device_get_sysname(event->dev_parent, &val); |
4cade7a1 YW |
275 | if (r < 0) |
276 | return r; | |
f6caab89 | 277 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 278 | break; |
7e9c23dd | 279 | case FORMAT_SUBST_DRIVER: |
4cade7a1 | 280 | if (!event->dev_parent) |
380d1901 | 281 | goto null_terminate; |
f3d241fe | 282 | r = sd_device_get_driver(event->dev_parent, &val); |
380d1901 YW |
283 | if (r == -ENOENT) |
284 | goto null_terminate; | |
4cade7a1 | 285 | if (r < 0) |
380d1901 | 286 | return r; |
f6caab89 | 287 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 288 | break; |
7e9c23dd YW |
289 | case FORMAT_SUBST_MAJOR: |
290 | case FORMAT_SUBST_MINOR: { | |
1b65f1eb | 291 | dev_t devnum; |
0d53705b | 292 | |
4cade7a1 YW |
293 | r = sd_device_get_devnum(dev, &devnum); |
294 | if (r < 0 && r != -ENOENT) | |
295 | return r; | |
f6caab89 | 296 | strpcpyf_full(&s, l, &truncated, "%u", r < 0 ? 0 : type == FORMAT_SUBST_MAJOR ? major(devnum) : minor(devnum)); |
0d53705b DS |
297 | break; |
298 | } | |
7e9c23dd | 299 | case FORMAT_SUBST_RESULT: { |
ce4f94b8 YW |
300 | unsigned index = 0; /* 0 means whole string */ |
301 | bool has_plus; | |
0d53705b | 302 | |
4cade7a1 | 303 | if (!event->program_result) |
380d1901 | 304 | goto null_terminate; |
4cade7a1 | 305 | |
ce4f94b8 YW |
306 | if (!isempty(attr)) { |
307 | r = safe_atou_optional_plus(attr, &index); | |
308 | if (r < 0) | |
309 | return r; | |
310 | ||
311 | has_plus = r; | |
312 | } | |
313 | ||
314 | if (index == 0) | |
f6caab89 | 315 | strpcpy_full(&s, l, event->program_result, &truncated); |
ce4f94b8 YW |
316 | else { |
317 | const char *start, *p; | |
318 | unsigned i; | |
319 | ||
320 | p = skip_leading_chars(event->program_result, NULL); | |
321 | ||
322 | for (i = 1; i < index; i++) { | |
1824300a | 323 | while (*p && !strchr(WHITESPACE, *p)) |
ce4f94b8 YW |
324 | p++; |
325 | p = skip_leading_chars(p, NULL); | |
326 | if (*p == '\0') | |
0d53705b DS |
327 | break; |
328 | } | |
ce4f94b8 YW |
329 | if (i != index) { |
330 | log_device_debug(dev, "requested part of result string not found"); | |
331 | goto null_terminate; | |
0d53705b | 332 | } |
ce4f94b8 YW |
333 | |
334 | start = p; | |
335 | /* %c{2+} copies the whole string from the second part on */ | |
336 | if (has_plus) | |
f6caab89 | 337 | strpcpy_full(&s, l, start, &truncated); |
ce4f94b8 | 338 | else { |
1824300a | 339 | while (*p && !strchr(WHITESPACE, *p)) |
ce4f94b8 | 340 | p++; |
f6caab89 | 341 | strnpcpy_full(&s, l, start, p - start, &truncated); |
0d53705b | 342 | } |
ce4f94b8 | 343 | } |
0d53705b DS |
344 | break; |
345 | } | |
7e9c23dd | 346 | case FORMAT_SUBST_ATTR: { |
c8eaaf69 | 347 | char vbuf[UDEV_NAME_SIZE]; |
0d53705b | 348 | int count; |
f6caab89 | 349 | bool t; |
0d53705b | 350 | |
13cd553f | 351 | if (isempty(attr)) |
4cade7a1 | 352 | return -EINVAL; |
0d53705b DS |
353 | |
354 | /* try to read the value specified by "[dmi/id]product_name" */ | |
1223227f | 355 | if (udev_resolve_subsys_kernel(attr, vbuf, sizeof(vbuf), true) == 0) |
4cade7a1 | 356 | val = vbuf; |
0d53705b DS |
357 | |
358 | /* try to read the attribute the device */ | |
4cade7a1 | 359 | if (!val) |
1c2ad7a6 | 360 | (void) device_get_sysattr_value_maybe_from_netlink(dev, &event->rtnl, attr, &val); |
0d53705b DS |
361 | |
362 | /* try to read the attribute of the parent device, other matches have selected */ | |
f3d241fe | 363 | if (!val && event->dev_parent && event->dev_parent != dev) |
1c2ad7a6 | 364 | (void) device_get_sysattr_value_maybe_from_netlink(event->dev_parent, &event->rtnl, attr, &val); |
0d53705b | 365 | |
4cade7a1 | 366 | if (!val) |
380d1901 | 367 | goto null_terminate; |
0d53705b DS |
368 | |
369 | /* strip trailing whitespace, and replace unwanted characters */ | |
4cade7a1 | 370 | if (val != vbuf) |
f6caab89 | 371 | strscpy_full(vbuf, sizeof(vbuf), val, &truncated); |
72801533 | 372 | delete_trailing_chars(vbuf, NULL); |
393fcaf7 | 373 | count = udev_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); |
0d53705b | 374 | if (count > 0) |
4cade7a1 | 375 | log_device_debug(dev, "%i character(s) replaced", count); |
f6caab89 YW |
376 | strpcpy_full(&s, l, vbuf, &t); |
377 | truncated = truncated || t; | |
0d53705b DS |
378 | break; |
379 | } | |
7e9c23dd | 380 | case FORMAT_SUBST_PARENT: |
4cade7a1 | 381 | r = sd_device_get_parent(dev, &parent); |
bc568a7a | 382 | if (r == -ENOENT) |
380d1901 | 383 | goto null_terminate; |
4cade7a1 | 384 | if (r < 0) |
380d1901 | 385 | return r; |
4cade7a1 | 386 | r = sd_device_get_devname(parent, &val); |
380d1901 YW |
387 | if (r == -ENOENT) |
388 | goto null_terminate; | |
4cade7a1 | 389 | if (r < 0) |
380d1901 | 390 | return r; |
f6caab89 | 391 | strpcpy_full(&s, l, val + STRLEN("/dev/"), &truncated); |
0d53705b | 392 | break; |
7e9c23dd | 393 | case FORMAT_SUBST_DEVNODE: |
4cade7a1 | 394 | r = sd_device_get_devname(dev, &val); |
380d1901 YW |
395 | if (r == -ENOENT) |
396 | goto null_terminate; | |
4cade7a1 | 397 | if (r < 0) |
380d1901 | 398 | return r; |
f6caab89 | 399 | strpcpy_full(&s, l, val, &truncated); |
0d53705b | 400 | break; |
7e9c23dd | 401 | case FORMAT_SUBST_NAME: |
4cade7a1 | 402 | if (event->name) |
f6caab89 | 403 | strpcpy_full(&s, l, event->name, &truncated); |
4cade7a1 | 404 | else if (sd_device_get_devname(dev, &val) >= 0) |
f6caab89 | 405 | strpcpy_full(&s, l, val + STRLEN("/dev/"), &truncated); |
4cade7a1 YW |
406 | else { |
407 | r = sd_device_get_sysname(dev, &val); | |
408 | if (r < 0) | |
409 | return r; | |
f6caab89 | 410 | strpcpy_full(&s, l, val, &truncated); |
4cade7a1 | 411 | } |
0d53705b | 412 | break; |
7e9c23dd | 413 | case FORMAT_SUBST_LINKS: |
f6caab89 | 414 | FOREACH_DEVICE_DEVLINK(dev, val) { |
4cade7a1 | 415 | if (s == dest) |
f6caab89 | 416 | strpcpy_full(&s, l, val + STRLEN("/dev/"), &truncated); |
4cade7a1 | 417 | else |
f6caab89 YW |
418 | strpcpyl_full(&s, l, &truncated, " ", val + STRLEN("/dev/"), NULL); |
419 | if (truncated) | |
420 | break; | |
421 | } | |
380d1901 YW |
422 | if (s == dest) |
423 | goto null_terminate; | |
0d53705b | 424 | break; |
7e9c23dd | 425 | case FORMAT_SUBST_ROOT: |
f6caab89 | 426 | strpcpy_full(&s, l, "/dev", &truncated); |
0d53705b | 427 | break; |
7e9c23dd | 428 | case FORMAT_SUBST_SYS: |
f6caab89 | 429 | strpcpy_full(&s, l, "/sys", &truncated); |
0d53705b | 430 | break; |
7e9c23dd | 431 | case FORMAT_SUBST_ENV: |
13cd553f YW |
432 | if (isempty(attr)) |
433 | return -EINVAL; | |
4cade7a1 | 434 | r = sd_device_get_property_value(dev, attr, &val); |
380d1901 YW |
435 | if (r == -ENOENT) |
436 | goto null_terminate; | |
4cade7a1 | 437 | if (r < 0) |
380d1901 | 438 | return r; |
f6caab89 | 439 | strpcpy_full(&s, l, val, &truncated); |
4cade7a1 | 440 | break; |
0d53705b | 441 | default: |
04499a70 | 442 | assert_not_reached(); |
0d53705b DS |
443 | } |
444 | ||
f6caab89 YW |
445 | if (ret_truncated) |
446 | *ret_truncated = truncated; | |
447 | ||
be452683 | 448 | return s - dest; |
380d1901 YW |
449 | |
450 | null_terminate: | |
f6caab89 YW |
451 | if (ret_truncated) |
452 | *ret_truncated = truncated; | |
453 | ||
380d1901 YW |
454 | *s = '\0'; |
455 | return 0; | |
0d53705b DS |
456 | } |
457 | ||
f6caab89 YW |
458 | size_t udev_event_apply_format( |
459 | UdevEvent *event, | |
460 | const char *src, | |
461 | char *dest, | |
462 | size_t size, | |
463 | bool replace_whitespace, | |
464 | bool *ret_truncated) { | |
465 | ||
466 | bool truncated = false; | |
13cd553f YW |
467 | const char *s = src; |
468 | int r; | |
912541b0 | 469 | |
a368732b YW |
470 | assert(event); |
471 | assert(event->dev); | |
472 | assert(src); | |
473 | assert(dest); | |
474 | assert(size > 0); | |
3b64e4d4 | 475 | |
1824300a | 476 | while (*s) { |
13cd553f | 477 | FormatSubstitutionType type; |
c8eaaf69 | 478 | char attr[UDEV_PATH_SIZE]; |
4cade7a1 | 479 | ssize_t subst_len; |
f6caab89 | 480 | bool t; |
912541b0 | 481 | |
d7aee41d | 482 | r = get_subst_type(&s, false, &type, attr); |
5eb6ef8b YW |
483 | if (r < 0) { |
484 | log_device_warning_errno(event->dev, r, "Invalid format string, ignoring: %s", src); | |
485 | break; | |
486 | } else if (r == 0) { | |
f6caab89 YW |
487 | if (size < 2) { |
488 | /* need space for this char and the terminating NUL */ | |
489 | truncated = true; | |
13cd553f | 490 | break; |
f6caab89 | 491 | } |
13cd553f YW |
492 | *dest++ = *s++; |
493 | size--; | |
4cade7a1 YW |
494 | continue; |
495 | } | |
e20a9171 | 496 | |
f6caab89 | 497 | subst_len = udev_event_subst_format(event, type, attr, dest, size, &t); |
5eb6ef8b YW |
498 | if (subst_len < 0) { |
499 | log_device_warning_errno(event->dev, subst_len, | |
500 | "Failed to substitute variable '$%s' or apply format '%%%c', ignoring: %m", | |
501 | format_type_to_string(type), format_type_to_char(type)); | |
502 | break; | |
503 | } | |
13cd553f | 504 | |
f6caab89 YW |
505 | truncated = truncated || t; |
506 | ||
7e9c23dd | 507 | /* FORMAT_SUBST_RESULT handles spaces itself */ |
13cd553f | 508 | if (replace_whitespace && type != FORMAT_SUBST_RESULT) |
5953d8b9 | 509 | /* udev_replace_whitespace can replace in-place, |
13cd553f | 510 | * and does nothing if subst_len == 0 */ |
5953d8b9 | 511 | subst_len = udev_replace_whitespace(dest, dest, subst_len); |
e20a9171 | 512 | |
13cd553f YW |
513 | dest += subst_len; |
514 | size -= subst_len; | |
912541b0 | 515 | } |
065db052 | 516 | |
13cd553f | 517 | assert(size >= 1); |
f6caab89 YW |
518 | |
519 | if (ret_truncated) | |
520 | *ret_truncated = truncated; | |
521 | ||
1824300a | 522 | *dest = '\0'; |
13cd553f | 523 | return size; |
f1128767 KS |
524 | } |
525 | ||
f85cc54c | 526 | int udev_check_format(const char *value, size_t *offset, const char **hint) { |
d7aee41d | 527 | FormatSubstitutionType type; |
f85cc54c | 528 | const char *s = value; |
c8eaaf69 | 529 | char attr[UDEV_PATH_SIZE]; |
d7aee41d YW |
530 | int r; |
531 | ||
1824300a | 532 | while (*s) { |
d7aee41d | 533 | r = get_subst_type(&s, true, &type, attr); |
f85cc54c ZJS |
534 | if (r < 0) { |
535 | if (offset) | |
536 | *offset = s - value; | |
537 | if (hint) | |
538 | *hint = "invalid substitution type"; | |
d7aee41d | 539 | return r; |
f85cc54c | 540 | } else if (r == 0) { |
d7aee41d YW |
541 | s++; |
542 | continue; | |
543 | } | |
544 | ||
f85cc54c ZJS |
545 | if (IN_SET(type, FORMAT_SUBST_ATTR, FORMAT_SUBST_ENV) && isempty(attr)) { |
546 | if (offset) | |
547 | *offset = s - value; | |
548 | if (hint) | |
549 | *hint = "attribute value missing"; | |
d7aee41d | 550 | return -EINVAL; |
f85cc54c | 551 | } |
d7aee41d YW |
552 | |
553 | if (type == FORMAT_SUBST_RESULT && !isempty(attr)) { | |
554 | unsigned i; | |
555 | ||
556 | r = safe_atou_optional_plus(attr, &i); | |
f85cc54c ZJS |
557 | if (r < 0) { |
558 | if (offset) | |
559 | *offset = s - value; | |
560 | if (hint) | |
561 | *hint = "attribute value not a valid number"; | |
d7aee41d | 562 | return r; |
f85cc54c | 563 | } |
d7aee41d YW |
564 | } |
565 | } | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
e81c3a4c YW |
570 | static int on_spawn_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
571 | Spawn *spawn = userdata; | |
572 | char buf[4096], *p; | |
573 | size_t size; | |
574 | ssize_t l; | |
9f537ae3 | 575 | int r; |
912541b0 | 576 | |
e81c3a4c YW |
577 | assert(spawn); |
578 | assert(fd == spawn->fd_stdout || fd == spawn->fd_stderr); | |
579 | assert(!spawn->result || spawn->result_len < spawn->result_size); | |
580 | ||
581 | if (fd == spawn->fd_stdout && spawn->result) { | |
582 | p = spawn->result + spawn->result_len; | |
583 | size = spawn->result_size - spawn->result_len; | |
584 | } else { | |
585 | p = buf; | |
586 | size = sizeof(buf); | |
912541b0 KS |
587 | } |
588 | ||
7056adbf | 589 | l = read(fd, p, size - (p == buf)); |
e81c3a4c | 590 | if (l < 0) { |
9f537ae3 PD |
591 | if (errno == EAGAIN) |
592 | goto reenable; | |
593 | ||
594 | log_device_error_errno(spawn->device, errno, | |
595 | "Failed to read stdout of '%s': %m", spawn->cmd); | |
912541b0 | 596 | |
e81c3a4c | 597 | return 0; |
912541b0 KS |
598 | } |
599 | ||
7056adbf YW |
600 | if ((size_t) l == size) { |
601 | log_device_warning(spawn->device, "Truncating stdout of '%s' up to %zu byte.", | |
602 | spawn->cmd, spawn->result_size); | |
603 | l--; | |
6b6e471a | 604 | spawn->truncated = true; |
7056adbf YW |
605 | } |
606 | ||
e81c3a4c YW |
607 | p[l] = '\0'; |
608 | if (fd == spawn->fd_stdout && spawn->result) | |
609 | spawn->result_len += l; | |
912541b0 | 610 | |
e81c3a4c YW |
611 | /* Log output only if we watch stderr. */ |
612 | if (l > 0 && spawn->fd_stderr >= 0) { | |
613 | _cleanup_strv_free_ char **v = NULL; | |
614 | char **q; | |
912541b0 | 615 | |
daceb818 YW |
616 | r = strv_split_newlines_full(&v, p, EXTRACT_RETAIN_ESCAPE); |
617 | if (r < 0) | |
618 | log_device_debug(spawn->device, | |
619 | "Failed to split output from '%s'(%s), ignoring: %m", | |
620 | spawn->cmd, fd == spawn->fd_stdout ? "out" : "err"); | |
912541b0 | 621 | |
e81c3a4c | 622 | STRV_FOREACH(q, v) |
88d566aa YW |
623 | log_device_debug(spawn->device, "'%s'(%s) '%s'", spawn->cmd, |
624 | fd == spawn->fd_stdout ? "out" : "err", *q); | |
912541b0 KS |
625 | } |
626 | ||
6b6e471a | 627 | if (l == 0 || spawn->truncated) |
9f537ae3 PD |
628 | return 0; |
629 | ||
9f537ae3 | 630 | reenable: |
2be0218a YW |
631 | /* Re-enable the event source if we did not encounter EOF */ |
632 | ||
9f537ae3 PD |
633 | r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); |
634 | if (r < 0) | |
635 | log_device_error_errno(spawn->device, r, | |
636 | "Failed to reactivate IO source of '%s'", spawn->cmd); | |
e81c3a4c | 637 | return 0; |
2181d30a KS |
638 | } |
639 | ||
8128f229 TG |
640 | static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
641 | Spawn *spawn = userdata; | |
912541b0 | 642 | |
8128f229 | 643 | assert(spawn); |
912541b0 | 644 | |
b428efa5 MS |
645 | DEVICE_TRACE_POINT(spawn_timeout, spawn->device, spawn->cmd); |
646 | ||
e2099267 | 647 | kill_and_sigcont(spawn->pid, spawn->timeout_signal); |
912541b0 | 648 | |
88d566aa YW |
649 | log_device_error(spawn->device, "Spawned process '%s' ["PID_FMT"] timed out after %s, killing", |
650 | spawn->cmd, spawn->pid, | |
5291f26d | 651 | FORMAT_TIMESPAN(spawn->timeout_usec, USEC_PER_SEC)); |
912541b0 | 652 | |
8128f229 TG |
653 | return 1; |
654 | } | |
67117413 | 655 | |
8128f229 TG |
656 | static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { |
657 | Spawn *spawn = userdata; | |
912541b0 | 658 | |
8128f229 | 659 | assert(spawn); |
67117413 | 660 | |
88d566aa YW |
661 | log_device_warning(spawn->device, "Spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", |
662 | spawn->cmd, spawn->pid, | |
5291f26d | 663 | FORMAT_TIMESPAN(spawn->timeout_warn_usec, USEC_PER_SEC)); |
8128f229 TG |
664 | |
665 | return 1; | |
666 | } | |
667 | ||
668 | static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
669 | Spawn *spawn = userdata; | |
a7521142 | 670 | int ret = -EIO; |
8128f229 TG |
671 | |
672 | assert(spawn); | |
673 | ||
674 | switch (si->si_code) { | |
675 | case CLD_EXITED: | |
a7521142 | 676 | if (si->si_status == 0) |
88d566aa | 677 | log_device_debug(spawn->device, "Process '%s' succeeded.", spawn->cmd); |
a7521142 | 678 | else |
ab54f12b | 679 | log_device_full(spawn->device, spawn->accept_failure ? LOG_DEBUG : LOG_WARNING, |
88d566aa | 680 | "Process '%s' failed with exit code %i.", spawn->cmd, si->si_status); |
a7521142 | 681 | ret = si->si_status; |
8128f229 TG |
682 | break; |
683 | case CLD_KILLED: | |
684 | case CLD_DUMPED: | |
88d566aa | 685 | log_device_error(spawn->device, "Process '%s' terminated by signal %s.", spawn->cmd, signal_to_string(si->si_status)); |
8128f229 TG |
686 | break; |
687 | default: | |
88d566aa | 688 | log_device_error(spawn->device, "Process '%s' failed due to unknown reason.", spawn->cmd); |
8128f229 | 689 | } |
912541b0 | 690 | |
b428efa5 MS |
691 | DEVICE_TRACE_POINT(spawn_exit, spawn->device, spawn->cmd); |
692 | ||
a7521142 | 693 | sd_event_exit(sd_event_source_get_event(s), ret); |
8128f229 TG |
694 | return 1; |
695 | } | |
696 | ||
e81c3a4c | 697 | static int spawn_wait(Spawn *spawn) { |
4afd3348 | 698 | _cleanup_(sd_event_unrefp) sd_event *e = NULL; |
9f537ae3 PD |
699 | _cleanup_(sd_event_source_unrefp) sd_event_source *sigchld_source = NULL; |
700 | _cleanup_(sd_event_source_unrefp) sd_event_source *stdout_source = NULL; | |
701 | _cleanup_(sd_event_source_unrefp) sd_event_source *stderr_source = NULL; | |
a7521142 | 702 | int r; |
8128f229 | 703 | |
e81c3a4c YW |
704 | assert(spawn); |
705 | ||
8128f229 TG |
706 | r = sd_event_new(&e); |
707 | if (r < 0) | |
90d260d8 | 708 | return log_device_debug_errno(spawn->device, r, "Failed to allocate sd-event object: %m"); |
8128f229 | 709 | |
e81c3a4c | 710 | if (spawn->timeout_usec > 0) { |
8128f229 TG |
711 | usec_t usec, age_usec; |
712 | ||
3285baa8 | 713 | usec = now(CLOCK_MONOTONIC); |
e81c3a4c YW |
714 | age_usec = usec - spawn->event_birth_usec; |
715 | if (age_usec < spawn->timeout_usec) { | |
716 | if (spawn->timeout_warn_usec > 0 && | |
717 | spawn->timeout_warn_usec < spawn->timeout_usec && | |
718 | spawn->timeout_warn_usec > age_usec) { | |
719 | spawn->timeout_warn_usec -= age_usec; | |
8128f229 | 720 | |
3285baa8 | 721 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c YW |
722 | usec + spawn->timeout_warn_usec, USEC_PER_SEC, |
723 | on_spawn_timeout_warning, spawn); | |
8128f229 | 724 | if (r < 0) |
90d260d8 | 725 | return log_device_debug_errno(spawn->device, r, "Failed to create timeout warning event source: %m"); |
912541b0 | 726 | } |
8128f229 | 727 | |
e81c3a4c | 728 | spawn->timeout_usec -= age_usec; |
8128f229 | 729 | |
3285baa8 | 730 | r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC, |
e81c3a4c | 731 | usec + spawn->timeout_usec, USEC_PER_SEC, on_spawn_timeout, spawn); |
8128f229 | 732 | if (r < 0) |
90d260d8 | 733 | return log_device_debug_errno(spawn->device, r, "Failed to create timeout event source: %m"); |
912541b0 KS |
734 | } |
735 | } | |
8128f229 | 736 | |
adeb26c1 | 737 | if (spawn->fd_stdout >= 0) { |
9f537ae3 PD |
738 | r = sd_event_add_io(e, &stdout_source, spawn->fd_stdout, EPOLLIN, on_spawn_io, spawn); |
739 | if (r < 0) | |
90d260d8 | 740 | return log_device_debug_errno(spawn->device, r, "Failed to create stdio event source: %m"); |
9f537ae3 | 741 | r = sd_event_source_set_enabled(stdout_source, SD_EVENT_ONESHOT); |
adeb26c1 | 742 | if (r < 0) |
90d260d8 | 743 | return log_device_debug_errno(spawn->device, r, "Failed to enable stdio event source: %m"); |
adeb26c1 | 744 | } |
e81c3a4c | 745 | |
adeb26c1 | 746 | if (spawn->fd_stderr >= 0) { |
9f537ae3 PD |
747 | r = sd_event_add_io(e, &stderr_source, spawn->fd_stderr, EPOLLIN, on_spawn_io, spawn); |
748 | if (r < 0) | |
90d260d8 | 749 | return log_device_debug_errno(spawn->device, r, "Failed to create stderr event source: %m"); |
9f537ae3 | 750 | r = sd_event_source_set_enabled(stderr_source, SD_EVENT_ONESHOT); |
adeb26c1 | 751 | if (r < 0) |
90d260d8 | 752 | return log_device_debug_errno(spawn->device, r, "Failed to enable stderr event source: %m"); |
adeb26c1 | 753 | } |
e81c3a4c | 754 | |
9f537ae3 | 755 | r = sd_event_add_child(e, &sigchld_source, spawn->pid, WEXITED, on_spawn_sigchld, spawn); |
8128f229 | 756 | if (r < 0) |
90d260d8 | 757 | return log_device_debug_errno(spawn->device, r, "Failed to create sigchild event source: %m"); |
9f537ae3 PD |
758 | /* SIGCHLD should be processed after IO is complete */ |
759 | r = sd_event_source_set_priority(sigchld_source, SD_EVENT_PRIORITY_NORMAL + 1); | |
760 | if (r < 0) | |
90d260d8 | 761 | return log_device_debug_errno(spawn->device, r, "Failed to set priority to sigchild event source: %m"); |
9f537ae3 | 762 | |
a7521142 | 763 | return sd_event_loop(e); |
2181d30a KS |
764 | } |
765 | ||
6b6e471a YW |
766 | int udev_event_spawn( |
767 | UdevEvent *event, | |
768 | usec_t timeout_usec, | |
769 | int timeout_signal, | |
770 | bool accept_failure, | |
771 | const char *cmd, | |
772 | char *result, | |
773 | size_t ressize, | |
774 | bool *ret_truncated) { | |
775 | ||
feaa6db7 YW |
776 | _cleanup_close_pair_ int outpipe[2] = {-1, -1}, errpipe[2] = {-1, -1}; |
777 | _cleanup_strv_free_ char **argv = NULL; | |
947ce772 | 778 | char **envp = NULL; |
e81c3a4c | 779 | Spawn spawn; |
912541b0 | 780 | pid_t pid; |
feaa6db7 | 781 | int r; |
912541b0 | 782 | |
dc8aec36 YW |
783 | assert(event); |
784 | assert(event->dev); | |
e81c3a4c YW |
785 | assert(result || ressize == 0); |
786 | ||
912541b0 | 787 | /* pipes from child to parent */ |
2e48548f | 788 | if (result || log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 789 | if (pipe2(outpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
88d566aa YW |
790 | return log_device_error_errno(event->dev, errno, |
791 | "Failed to create pipe for command '%s': %m", cmd); | |
912541b0 | 792 | |
feaa6db7 | 793 | if (log_get_max_level() >= LOG_INFO) |
f71e8ec1 | 794 | if (pipe2(errpipe, O_NONBLOCK|O_CLOEXEC) != 0) |
88d566aa YW |
795 | return log_device_error_errno(event->dev, errno, |
796 | "Failed to create pipe for command '%s': %m", cmd); | |
feaa6db7 | 797 | |
90e30d76 | 798 | r = strv_split_full(&argv, cmd, NULL, EXTRACT_UNQUOTE | EXTRACT_RELAX | EXTRACT_RETAIN_ESCAPE); |
0645b83a ZJS |
799 | if (r < 0) |
800 | return log_device_error_errno(event->dev, r, "Failed to split command: %m"); | |
feaa6db7 | 801 | |
baaa35ad | 802 | if (isempty(argv[0])) |
88d566aa YW |
803 | return log_device_error_errno(event->dev, SYNTHETIC_ERRNO(EINVAL), |
804 | "Invalid command '%s'", cmd); | |
dc8aec36 | 805 | |
feaa6db7 YW |
806 | /* allow programs in /usr/lib/udev/ to be called without the path */ |
807 | if (!path_is_absolute(argv[0])) { | |
808 | char *program; | |
809 | ||
62a85ee0 | 810 | program = path_join(UDEVLIBEXECDIR, argv[0]); |
feaa6db7 YW |
811 | if (!program) |
812 | return log_oom(); | |
bbf35206 | 813 | |
feaa6db7 YW |
814 | free_and_replace(argv[0], program); |
815 | } | |
816 | ||
cf28ad46 | 817 | r = device_get_properties_strv(event->dev, &envp); |
947ce772 | 818 | if (r < 0) |
cf28ad46 | 819 | return log_device_error_errno(event->dev, r, "Failed to get device properties"); |
947ce772 | 820 | |
88d566aa | 821 | log_device_debug(event->dev, "Starting '%s'", cmd); |
3ad4d482 | 822 | |
6ce075a2 | 823 | r = safe_fork("(spawn)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); |
feaa6db7 | 824 | if (r < 0) |
88d566aa YW |
825 | return log_device_error_errno(event->dev, r, |
826 | "Failed to fork() to execute command '%s': %m", cmd); | |
feaa6db7 | 827 | if (r == 0) { |
aedec452 | 828 | if (rearrange_stdio(-1, TAKE_FD(outpipe[WRITE_END]), TAKE_FD(errpipe[WRITE_END])) < 0) |
84b1ccb9 | 829 | _exit(EXIT_FAILURE); |
912541b0 | 830 | |
84b1ccb9 | 831 | (void) close_all_fds(NULL, 0); |
595225af | 832 | (void) rlimit_nofile_safe(); |
912541b0 | 833 | |
b428efa5 MS |
834 | DEVICE_TRACE_POINT(spawn_exec, event->dev, cmd); |
835 | ||
947ce772 | 836 | execve(argv[0], argv, envp); |
84b1ccb9 | 837 | _exit(EXIT_FAILURE); |
bbf35206 | 838 | } |
912541b0 | 839 | |
4c253ed1 LP |
840 | /* parent closed child's ends of pipes */ |
841 | outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]); | |
842 | errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]); | |
912541b0 | 843 | |
e81c3a4c | 844 | spawn = (Spawn) { |
88d566aa | 845 | .device = event->dev, |
e81c3a4c YW |
846 | .cmd = cmd, |
847 | .pid = pid, | |
848 | .accept_failure = accept_failure, | |
66f737b4 | 849 | .timeout_warn_usec = udev_warn_timeout(timeout_usec), |
e81c3a4c | 850 | .timeout_usec = timeout_usec, |
e2099267 | 851 | .timeout_signal = timeout_signal, |
e81c3a4c YW |
852 | .event_birth_usec = event->birth_usec, |
853 | .fd_stdout = outpipe[READ_END], | |
854 | .fd_stderr = errpipe[READ_END], | |
855 | .result = result, | |
856 | .result_size = ressize, | |
857 | }; | |
858 | r = spawn_wait(&spawn); | |
feaa6db7 | 859 | if (r < 0) |
88d566aa YW |
860 | return log_device_error_errno(event->dev, r, |
861 | "Failed to wait for spawned command '%s': %m", cmd); | |
2181d30a | 862 | |
e81c3a4c YW |
863 | if (result) |
864 | result[spawn.result_len] = '\0'; | |
865 | ||
6b6e471a YW |
866 | if (ret_truncated) |
867 | *ret_truncated = spawn.truncated; | |
868 | ||
a7521142 | 869 | return r; /* 0 for success, and positive if the program failed */ |
2181d30a KS |
870 | } |
871 | ||
2e088715 | 872 | static int rename_netif(UdevEvent *event) { |
cf28ad46 | 873 | sd_device *dev = event->dev; |
d4d690fa | 874 | const char *oldname; |
6681eb02 | 875 | unsigned flags; |
2740750d YW |
876 | int ifindex, r; |
877 | ||
878 | if (!event->name) | |
879 | return 0; /* No new name is requested. */ | |
880 | ||
881 | r = sd_device_get_sysname(dev, &oldname); | |
882 | if (r < 0) | |
883 | return log_device_error_errno(dev, r, "Failed to get sysname: %m"); | |
884 | ||
885 | if (streq(event->name, oldname)) | |
886 | return 0; /* The interface name is already requested name. */ | |
887 | ||
a1130022 | 888 | if (!device_for_action(dev, SD_DEVICE_ADD)) |
2740750d | 889 | return 0; /* Rename the interface only when it is added. */ |
16d26d55 | 890 | |
2740750d YW |
891 | r = sd_device_get_ifindex(dev, &ifindex); |
892 | if (r == -ENOENT) | |
893 | return 0; /* Device is not a network interface. */ | |
894 | if (r < 0) | |
895 | return log_device_error_errno(dev, r, "Failed to get ifindex: %m"); | |
912541b0 | 896 | |
068b0f77 YW |
897 | if (naming_scheme_has(NAMING_REPLACE_STRICTLY) && |
898 | !ifname_valid(event->name)) { | |
899 | log_device_warning(dev, "Invalid network interface name, ignoring: %s", event->name); | |
900 | return 0; | |
901 | } | |
902 | ||
65022cd7 | 903 | r = rtnl_get_link_info(&event->rtnl, ifindex, NULL, &flags, NULL, NULL, NULL); |
6681eb02 YW |
904 | if (r < 0) |
905 | return log_device_warning_errno(dev, r, "Failed to get link flags: %m"); | |
906 | ||
907 | if (FLAGS_SET(flags, IFF_UP)) { | |
908 | log_device_info(dev, "Network interface '%s' is already up, refusing to rename to '%s'.", | |
909 | oldname, event->name); | |
910 | return 0; | |
911 | } | |
912 | ||
a4055a60 YW |
913 | /* Set ID_RENAMING boolean property here, and drop it in the corresponding move uevent later. */ |
914 | r = device_add_property(dev, "ID_RENAMING", "1"); | |
915 | if (r < 0) | |
99058cd6 | 916 | return log_device_warning_errno(dev, r, "Failed to add 'ID_RENAMING' property: %m"); |
912541b0 | 917 | |
2740750d | 918 | r = device_rename(dev, event->name); |
f647962d | 919 | if (r < 0) |
99058cd6 | 920 | return log_device_warning_errno(dev, r, "Failed to update properties with new name '%s': %m", event->name); |
16d26d55 | 921 | |
ae353ec2 YW |
922 | /* Also set ID_RENAMING boolean property to cloned sd_device object and save it to database |
923 | * before calling rtnl_set_link_name(). Otherwise, clients (e.g., systemd-networkd) may receive | |
924 | * RTM_NEWLINK netlink message before the database is updated. */ | |
925 | r = device_add_property(event->dev_db_clone, "ID_RENAMING", "1"); | |
926 | if (r < 0) | |
927 | return log_device_warning_errno(event->dev_db_clone, r, "Failed to add 'ID_RENAMING' property: %m"); | |
928 | ||
929 | r = device_update_db(event->dev_db_clone); | |
930 | if (r < 0) | |
931 | return log_device_debug_errno(event->dev_db_clone, r, "Failed to update database under /run/udev/data/: %m"); | |
932 | ||
933 | r = rtnl_set_link_name(&event->rtnl, ifindex, event->name); | |
934 | if (r < 0) | |
935 | return log_device_error_errno(dev, r, "Failed to rename network interface %i from '%s' to '%s': %m", | |
936 | ifindex, oldname, event->name); | |
937 | ||
589384be | 938 | log_device_debug(dev, "Network interface %i is renamed from '%s' to '%s'", ifindex, oldname, event->name); |
16d26d55 | 939 | |
2740750d | 940 | return 1; |
d46f37fd KS |
941 | } |
942 | ||
2e088715 | 943 | static int update_devnode(UdevEvent *event) { |
cf28ad46 | 944 | sd_device *dev = event->dev; |
e52eaf56 YW |
945 | int r; |
946 | ||
7af1c780 | 947 | r = sd_device_get_devnum(dev, NULL); |
e52eaf56 YW |
948 | if (r == -ENOENT) |
949 | return 0; | |
950 | if (r < 0) | |
951 | return log_device_error_errno(dev, r, "Failed to get devnum: %m"); | |
952 | ||
25de7aa7 | 953 | if (!uid_is_valid(event->uid)) { |
e52eaf56 | 954 | r = device_get_devnode_uid(dev, &event->uid); |
3708c0f4 | 955 | if (r < 0 && r != -ENOENT) |
e52eaf56 YW |
956 | return log_device_error_errno(dev, r, "Failed to get devnode UID: %m"); |
957 | } | |
958 | ||
25de7aa7 | 959 | if (!gid_is_valid(event->gid)) { |
e52eaf56 | 960 | r = device_get_devnode_gid(dev, &event->gid); |
3708c0f4 | 961 | if (r < 0 && r != -ENOENT) |
e52eaf56 YW |
962 | return log_device_error_errno(dev, r, "Failed to get devnode GID: %m"); |
963 | } | |
964 | ||
25de7aa7 | 965 | if (event->mode == MODE_INVALID) { |
e52eaf56 YW |
966 | r = device_get_devnode_mode(dev, &event->mode); |
967 | if (r < 0 && r != -ENOENT) | |
968 | return log_device_error_errno(dev, r, "Failed to get devnode mode: %m"); | |
e52eaf56 | 969 | } |
3708c0f4 ZJS |
970 | if (event->mode == MODE_INVALID && gid_is_valid(event->gid) && event->gid > 0) |
971 | /* If group is set, but mode is not set, "upgrade" mode for the group. */ | |
972 | event->mode = 0660; | |
973 | ||
a1130022 | 974 | bool apply_mac = device_for_action(dev, SD_DEVICE_ADD); |
e52eaf56 | 975 | |
2f48561e YW |
976 | r = udev_node_apply_permissions(dev, apply_mac, event->mode, event->uid, event->gid, event->seclabel_list); |
977 | if (r < 0) | |
978 | return log_device_error_errno(dev, r, "Failed to apply devnode permissions: %m"); | |
979 | ||
980 | return udev_node_update(dev, event->dev_db_clone); | |
e52eaf56 YW |
981 | } |
982 | ||
4cac2260 | 983 | static int event_execute_rules_on_remove( |
2e088715 | 984 | UdevEvent *event, |
df7ee959 | 985 | int inotify_fd, |
66f737b4 | 986 | usec_t timeout_usec, |
e2099267 | 987 | int timeout_signal, |
eb1f9e30 | 988 | Hashmap *properties_list, |
9a07157d | 989 | UdevRules *rules) { |
912541b0 | 990 | |
cf28ad46 | 991 | sd_device *dev = event->dev; |
eb1f9e30 | 992 | int r; |
912541b0 | 993 | |
ebcc52fa | 994 | r = device_read_db_internal(dev, true); |
eb1f9e30 YW |
995 | if (r < 0) |
996 | log_device_debug_errno(dev, r, "Failed to read database under /run/udev/data/: %m"); | |
107f2e25 | 997 | |
eb1f9e30 YW |
998 | r = device_tag_index(dev, NULL, false); |
999 | if (r < 0) | |
1000 | log_device_debug_errno(dev, r, "Failed to remove corresponding tag files under /run/udev/tag/, ignoring: %m"); | |
912541b0 | 1001 | |
eb1f9e30 YW |
1002 | r = device_delete_db(dev); |
1003 | if (r < 0) | |
1004 | log_device_debug_errno(dev, r, "Failed to delete database under /run/udev/data/, ignoring: %m"); | |
912541b0 | 1005 | |
5e0d0510 | 1006 | (void) udev_watch_end(inotify_fd, dev); |
eb1f9e30 | 1007 | |
4cac2260 | 1008 | r = udev_rules_apply_to_event(rules, event, timeout_usec, timeout_signal, properties_list); |
eb1f9e30 | 1009 | |
d4a95a95 | 1010 | if (sd_device_get_devnum(dev, NULL) >= 0) |
eb1f9e30 | 1011 | (void) udev_node_remove(dev); |
4cac2260 YW |
1012 | |
1013 | return r; | |
eb1f9e30 YW |
1014 | } |
1015 | ||
51d9aec0 | 1016 | static int udev_event_on_move(sd_device *dev) { |
a4055a60 YW |
1017 | int r; |
1018 | ||
a4055a60 YW |
1019 | /* Drop previously added property */ |
1020 | r = device_add_property(dev, "ID_RENAMING", NULL); | |
1021 | if (r < 0) | |
99058cd6 | 1022 | return log_device_debug_errno(dev, r, "Failed to remove 'ID_RENAMING' property: %m"); |
a4055a60 YW |
1023 | |
1024 | return 0; | |
1025 | } | |
1026 | ||
e77b146f LP |
1027 | static int copy_all_tags(sd_device *d, sd_device *s) { |
1028 | const char *tag; | |
1029 | int r; | |
1030 | ||
1031 | assert(d); | |
1032 | ||
1033 | if (!s) | |
1034 | return 0; | |
1035 | ||
5b90b906 | 1036 | FOREACH_DEVICE_TAG(s, tag) { |
e77b146f LP |
1037 | r = device_add_tag(d, tag, false); |
1038 | if (r < 0) | |
1039 | return r; | |
1040 | } | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
df7ee959 YW |
1045 | int udev_event_execute_rules( |
1046 | UdevEvent *event, | |
1047 | int inotify_fd, /* This may be negative */ | |
1048 | usec_t timeout_usec, | |
1049 | int timeout_signal, | |
1050 | Hashmap *properties_list, | |
1051 | UdevRules *rules) { | |
1052 | ||
a1130022 | 1053 | sd_device_action_t action; |
6d0fdf45 | 1054 | sd_device *dev; |
eb1f9e30 YW |
1055 | int r; |
1056 | ||
1057 | assert(event); | |
1058 | assert(rules); | |
1059 | ||
6d0fdf45 YW |
1060 | dev = event->dev; |
1061 | ||
a1130022 | 1062 | r = sd_device_get_action(dev, &action); |
eb1f9e30 | 1063 | if (r < 0) |
d4d690fa | 1064 | return log_device_error_errno(dev, r, "Failed to get ACTION: %m"); |
b081b27e | 1065 | |
4cac2260 YW |
1066 | if (action == SD_DEVICE_REMOVE) |
1067 | return event_execute_rules_on_remove(event, inotify_fd, timeout_usec, timeout_signal, properties_list, rules); | |
912541b0 | 1068 | |
e7f781e4 YW |
1069 | /* Disable watch during event processing. */ |
1070 | (void) udev_watch_end(inotify_fd, event->dev); | |
1071 | ||
480ecb7d | 1072 | r = device_clone_with_db(dev, &event->dev_db_clone); |
eb1f9e30 | 1073 | if (r < 0) |
99058cd6 | 1074 | return log_device_debug_errno(dev, r, "Failed to clone sd_device object: %m"); |
912541b0 | 1075 | |
e77b146f LP |
1076 | r = copy_all_tags(dev, event->dev_db_clone); |
1077 | if (r < 0) | |
1078 | log_device_warning_errno(dev, r, "Failed to copy all tags from old database entry, ignoring: %m"); | |
1079 | ||
a1130022 | 1080 | if (action == SD_DEVICE_MOVE) { |
51d9aec0 | 1081 | r = udev_event_on_move(event->dev); |
99058cd6 YW |
1082 | if (r < 0) |
1083 | return r; | |
1084 | } | |
eb1f9e30 | 1085 | |
b428efa5 MS |
1086 | DEVICE_TRACE_POINT(rules_start, dev); |
1087 | ||
e2099267 | 1088 | r = udev_rules_apply_to_event(rules, event, timeout_usec, timeout_signal, properties_list); |
99058cd6 YW |
1089 | if (r < 0) |
1090 | return log_device_debug_errno(dev, r, "Failed to apply udev rules: %m"); | |
eb1f9e30 | 1091 | |
b428efa5 MS |
1092 | DEVICE_TRACE_POINT(rules_finished, dev); |
1093 | ||
99058cd6 YW |
1094 | r = rename_netif(event); |
1095 | if (r < 0) | |
1096 | return r; | |
1097 | ||
1098 | r = update_devnode(event); | |
1099 | if (r < 0) | |
1100 | return r; | |
eb1f9e30 YW |
1101 | |
1102 | /* preserve old, or get new initialization timestamp */ | |
480ecb7d | 1103 | r = device_ensure_usec_initialized(dev, event->dev_db_clone); |
eb1f9e30 | 1104 | if (r < 0) |
99058cd6 | 1105 | return log_device_debug_errno(dev, r, "Failed to set initialization timestamp: %m"); |
eb1f9e30 YW |
1106 | |
1107 | /* (re)write database file */ | |
480ecb7d | 1108 | r = device_tag_index(dev, event->dev_db_clone, true); |
eb1f9e30 | 1109 | if (r < 0) |
99058cd6 | 1110 | return log_device_debug_errno(dev, r, "Failed to update tags under /run/udev/tag/: %m"); |
eb1f9e30 YW |
1111 | |
1112 | r = device_update_db(dev); | |
1113 | if (r < 0) | |
99058cd6 | 1114 | return log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/: %m"); |
eb1f9e30 | 1115 | |
996c8390 MS |
1116 | device_set_is_initialized(dev); |
1117 | ||
7920d0a1 | 1118 | return 0; |
d46f37fd | 1119 | } |
2d73813e | 1120 | |
e2099267 | 1121 | void udev_event_execute_run(UdevEvent *event, usec_t timeout_usec, int timeout_signal) { |
1448820a | 1122 | const char *command; |
29448498 | 1123 | void *val; |
25de7aa7 | 1124 | int r; |
912541b0 | 1125 | |
90e74a66 | 1126 | ORDERED_HASHMAP_FOREACH_KEY(val, command, event->run_list) { |
25de7aa7 | 1127 | UdevBuiltinCommand builtin_cmd = PTR_TO_UDEV_BUILTIN_CMD(val); |
912541b0 | 1128 | |
25de7aa7 YW |
1129 | if (builtin_cmd != _UDEV_BUILTIN_INVALID) { |
1130 | log_device_debug(event->dev, "Running built-in command \"%s\"", command); | |
92232230 | 1131 | r = udev_builtin_run(event->dev, &event->rtnl, builtin_cmd, command, false); |
25de7aa7 YW |
1132 | if (r < 0) |
1133 | log_device_debug_errno(event->dev, r, "Failed to run built-in command \"%s\", ignoring: %m", command); | |
1134 | } else { | |
6b92f429 | 1135 | if (event->exec_delay_usec > 0) { |
25de7aa7 | 1136 | log_device_debug(event->dev, "Delaying execution of \"%s\" for %s.", |
5291f26d | 1137 | command, FORMAT_TIMESPAN(event->exec_delay_usec, USEC_PER_SEC)); |
6b92f429 | 1138 | (void) usleep(event->exec_delay_usec); |
912541b0 KS |
1139 | } |
1140 | ||
25de7aa7 | 1141 | log_device_debug(event->dev, "Running command \"%s\"", command); |
e2099267 | 1142 | |
6b6e471a | 1143 | r = udev_event_spawn(event, timeout_usec, timeout_signal, false, command, NULL, 0, NULL); |
08de1958 YW |
1144 | if (r < 0) |
1145 | log_device_warning_errno(event->dev, r, "Failed to execute '%s', ignoring: %m", command); | |
1146 | else if (r > 0) /* returned value is positive when program fails */ | |
25de7aa7 | 1147 | log_device_debug(event->dev, "Command \"%s\" returned %d (error), ignoring.", command, r); |
912541b0 KS |
1148 | } |
1149 | } | |
2d73813e | 1150 | } |
0d77bc4a YW |
1151 | |
1152 | int udev_event_process_inotify_watch(UdevEvent *event, int inotify_fd) { | |
1153 | sd_device *dev; | |
0d77bc4a YW |
1154 | |
1155 | assert(event); | |
1156 | assert(inotify_fd >= 0); | |
1157 | ||
1158 | dev = event->dev; | |
1159 | ||
1160 | assert(dev); | |
1161 | ||
1162 | if (device_for_action(dev, SD_DEVICE_REMOVE)) | |
1163 | return 0; | |
1164 | ||
e7f781e4 YW |
1165 | if (event->inotify_watch) |
1166 | (void) udev_watch_begin(inotify_fd, dev); | |
1167 | else | |
0d77bc4a | 1168 | (void) udev_watch_end(inotify_fd, dev); |
0d77bc4a YW |
1169 | |
1170 | return 0; | |
1171 | } |