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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | /*** | |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <stddef.h> | |
23 | #include <stdint.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
27 | #include "alloc-util.h" | |
28 | #include "glob-util.h" | |
29 | #include "hexdecoct.h" | |
30 | #include "path-util.h" | |
31 | #include "string-util.h" | |
32 | #include "strv.h" | |
33 | #include "unit-name.h" | |
34 | ||
35 | /* Characters valid in a unit name. */ | |
36 | #define VALID_CHARS \ | |
37 | DIGITS \ | |
38 | LETTERS \ | |
39 | ":-_.\\" | |
40 | ||
41 | /* The same, but also permits the single @ character that may appear */ | |
42 | #define VALID_CHARS_WITH_AT \ | |
43 | "@" \ | |
44 | VALID_CHARS | |
45 | ||
46 | /* All chars valid in a unit name glob */ | |
47 | #define VALID_CHARS_GLOB \ | |
48 | VALID_CHARS_WITH_AT \ | |
49 | "[]!-*?" | |
50 | ||
51 | bool unit_name_is_valid(const char *n, UnitNameFlags flags) { | |
52 | const char *e, *i, *at; | |
53 | ||
54 | assert((flags & ~(UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) == 0); | |
55 | ||
56 | if (_unlikely_(flags == 0)) | |
57 | return false; | |
58 | ||
59 | if (isempty(n)) | |
60 | return false; | |
61 | ||
62 | if (strlen(n) >= UNIT_NAME_MAX) | |
63 | return false; | |
64 | ||
65 | e = strrchr(n, '.'); | |
66 | if (!e || e == n) | |
67 | return false; | |
68 | ||
69 | if (unit_type_from_string(e + 1) < 0) | |
70 | return false; | |
71 | ||
72 | for (i = n, at = NULL; i < e; i++) { | |
73 | ||
74 | if (*i == '@' && !at) | |
75 | at = i; | |
76 | ||
77 | if (!strchr("@" VALID_CHARS, *i)) | |
78 | return false; | |
79 | } | |
80 | ||
81 | if (at == n) | |
82 | return false; | |
83 | ||
84 | if (flags & UNIT_NAME_PLAIN) | |
85 | if (!at) | |
86 | return true; | |
87 | ||
88 | if (flags & UNIT_NAME_INSTANCE) | |
89 | if (at && e > at + 1) | |
90 | return true; | |
91 | ||
92 | if (flags & UNIT_NAME_TEMPLATE) | |
93 | if (at && e == at + 1) | |
94 | return true; | |
95 | ||
96 | return false; | |
97 | } | |
98 | ||
99 | bool unit_prefix_is_valid(const char *p) { | |
100 | ||
101 | /* We don't allow additional @ in the prefix string */ | |
102 | ||
103 | if (isempty(p)) | |
104 | return false; | |
105 | ||
106 | return in_charset(p, VALID_CHARS); | |
107 | } | |
108 | ||
109 | bool unit_instance_is_valid(const char *i) { | |
110 | ||
111 | /* The max length depends on the length of the string, so we | |
112 | * don't really check this here. */ | |
113 | ||
114 | if (isempty(i)) | |
115 | return false; | |
116 | ||
117 | /* We allow additional @ in the instance string, we do not | |
118 | * allow them in the prefix! */ | |
119 | ||
120 | return in_charset(i, "@" VALID_CHARS); | |
121 | } | |
122 | ||
123 | bool unit_suffix_is_valid(const char *s) { | |
124 | if (isempty(s)) | |
125 | return false; | |
126 | ||
127 | if (s[0] != '.') | |
128 | return false; | |
129 | ||
130 | if (unit_type_from_string(s + 1) < 0) | |
131 | return false; | |
132 | ||
133 | return true; | |
134 | } | |
135 | ||
136 | int unit_name_to_prefix(const char *n, char **ret) { | |
137 | const char *p; | |
138 | char *s; | |
139 | ||
140 | assert(n); | |
141 | assert(ret); | |
142 | ||
143 | if (!unit_name_is_valid(n, UNIT_NAME_ANY)) | |
144 | return -EINVAL; | |
145 | ||
146 | p = strchr(n, '@'); | |
147 | if (!p) | |
148 | p = strrchr(n, '.'); | |
149 | ||
150 | assert_se(p); | |
151 | ||
152 | s = strndup(n, p - n); | |
153 | if (!s) | |
154 | return -ENOMEM; | |
155 | ||
156 | *ret = s; | |
157 | return 0; | |
158 | } | |
159 | ||
160 | int unit_name_to_instance(const char *n, char **instance) { | |
161 | const char *p, *d; | |
162 | char *i; | |
163 | ||
164 | assert(n); | |
165 | assert(instance); | |
166 | ||
167 | if (!unit_name_is_valid(n, UNIT_NAME_ANY)) | |
168 | return -EINVAL; | |
169 | ||
170 | /* Everything past the first @ and before the last . is the instance */ | |
171 | p = strchr(n, '@'); | |
172 | if (!p) { | |
173 | *instance = NULL; | |
174 | return 0; | |
175 | } | |
176 | ||
177 | p++; | |
178 | ||
179 | d = strrchr(p, '.'); | |
180 | if (!d) | |
181 | return -EINVAL; | |
182 | ||
183 | i = strndup(p, d-p); | |
184 | if (!i) | |
185 | return -ENOMEM; | |
186 | ||
187 | *instance = i; | |
188 | return 1; | |
189 | } | |
190 | ||
191 | int unit_name_to_prefix_and_instance(const char *n, char **ret) { | |
192 | const char *d; | |
193 | char *s; | |
194 | ||
195 | assert(n); | |
196 | assert(ret); | |
197 | ||
198 | if (!unit_name_is_valid(n, UNIT_NAME_ANY)) | |
199 | return -EINVAL; | |
200 | ||
201 | d = strrchr(n, '.'); | |
202 | if (!d) | |
203 | return -EINVAL; | |
204 | ||
205 | s = strndup(n, d - n); | |
206 | if (!s) | |
207 | return -ENOMEM; | |
208 | ||
209 | *ret = s; | |
210 | return 0; | |
211 | } | |
212 | ||
213 | UnitType unit_name_to_type(const char *n) { | |
214 | const char *e; | |
215 | ||
216 | assert(n); | |
217 | ||
218 | if (!unit_name_is_valid(n, UNIT_NAME_ANY)) | |
219 | return _UNIT_TYPE_INVALID; | |
220 | ||
221 | assert_se(e = strrchr(n, '.')); | |
222 | ||
223 | return unit_type_from_string(e + 1); | |
224 | } | |
225 | ||
226 | int unit_name_change_suffix(const char *n, const char *suffix, char **ret) { | |
227 | char *e, *s; | |
228 | size_t a, b; | |
229 | ||
230 | assert(n); | |
231 | assert(suffix); | |
232 | assert(ret); | |
233 | ||
234 | if (!unit_name_is_valid(n, UNIT_NAME_ANY)) | |
235 | return -EINVAL; | |
236 | ||
237 | if (!unit_suffix_is_valid(suffix)) | |
238 | return -EINVAL; | |
239 | ||
240 | assert_se(e = strrchr(n, '.')); | |
241 | ||
242 | a = e - n; | |
243 | b = strlen(suffix); | |
244 | ||
245 | s = new(char, a + b + 1); | |
246 | if (!s) | |
247 | return -ENOMEM; | |
248 | ||
249 | strcpy(mempcpy(s, n, a), suffix); | |
250 | *ret = s; | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | int unit_name_build(const char *prefix, const char *instance, const char *suffix, char **ret) { | |
256 | char *s; | |
257 | ||
258 | assert(prefix); | |
259 | assert(suffix); | |
260 | assert(ret); | |
261 | ||
262 | if (!unit_prefix_is_valid(prefix)) | |
263 | return -EINVAL; | |
264 | ||
265 | if (instance && !unit_instance_is_valid(instance)) | |
266 | return -EINVAL; | |
267 | ||
268 | if (!unit_suffix_is_valid(suffix)) | |
269 | return -EINVAL; | |
270 | ||
271 | if (!instance) | |
272 | s = strappend(prefix, suffix); | |
273 | else | |
274 | s = strjoin(prefix, "@", instance, suffix); | |
275 | if (!s) | |
276 | return -ENOMEM; | |
277 | ||
278 | *ret = s; | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static char *do_escape_char(char c, char *t) { | |
283 | assert(t); | |
284 | ||
285 | *(t++) = '\\'; | |
286 | *(t++) = 'x'; | |
287 | *(t++) = hexchar(c >> 4); | |
288 | *(t++) = hexchar(c); | |
289 | ||
290 | return t; | |
291 | } | |
292 | ||
293 | static char *do_escape(const char *f, char *t) { | |
294 | assert(f); | |
295 | assert(t); | |
296 | ||
297 | /* do not create units with a leading '.', like for "/.dotdir" mount points */ | |
298 | if (*f == '.') { | |
299 | t = do_escape_char(*f, t); | |
300 | f++; | |
301 | } | |
302 | ||
303 | for (; *f; f++) { | |
304 | if (*f == '/') | |
305 | *(t++) = '-'; | |
306 | else if (IN_SET(*f, '-', '\\') || !strchr(VALID_CHARS, *f)) | |
307 | t = do_escape_char(*f, t); | |
308 | else | |
309 | *(t++) = *f; | |
310 | } | |
311 | ||
312 | return t; | |
313 | } | |
314 | ||
315 | char *unit_name_escape(const char *f) { | |
316 | char *r, *t; | |
317 | ||
318 | assert(f); | |
319 | ||
320 | r = new(char, strlen(f)*4+1); | |
321 | if (!r) | |
322 | return NULL; | |
323 | ||
324 | t = do_escape(f, r); | |
325 | *t = 0; | |
326 | ||
327 | return r; | |
328 | } | |
329 | ||
330 | int unit_name_unescape(const char *f, char **ret) { | |
331 | _cleanup_free_ char *r = NULL; | |
332 | char *t; | |
333 | ||
334 | assert(f); | |
335 | ||
336 | r = strdup(f); | |
337 | if (!r) | |
338 | return -ENOMEM; | |
339 | ||
340 | for (t = r; *f; f++) { | |
341 | if (*f == '-') | |
342 | *(t++) = '/'; | |
343 | else if (*f == '\\') { | |
344 | int a, b; | |
345 | ||
346 | if (f[1] != 'x') | |
347 | return -EINVAL; | |
348 | ||
349 | a = unhexchar(f[2]); | |
350 | if (a < 0) | |
351 | return -EINVAL; | |
352 | ||
353 | b = unhexchar(f[3]); | |
354 | if (b < 0) | |
355 | return -EINVAL; | |
356 | ||
357 | *(t++) = (char) (((uint8_t) a << 4U) | (uint8_t) b); | |
358 | f += 3; | |
359 | } else | |
360 | *(t++) = *f; | |
361 | } | |
362 | ||
363 | *t = 0; | |
364 | ||
365 | *ret = r; | |
366 | r = NULL; | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | int unit_name_path_escape(const char *f, char **ret) { | |
372 | char *p, *s; | |
373 | ||
374 | assert(f); | |
375 | assert(ret); | |
376 | ||
377 | p = strdupa(f); | |
378 | if (!p) | |
379 | return -ENOMEM; | |
380 | ||
381 | path_kill_slashes(p); | |
382 | ||
383 | if (STR_IN_SET(p, "/", "")) | |
384 | s = strdup("-"); | |
385 | else { | |
386 | if (!path_is_safe(p)) | |
387 | return -EINVAL; | |
388 | ||
389 | /* Truncate trailing slashes */ | |
390 | delete_trailing_chars(p, "/"); | |
391 | ||
392 | /* Truncate leading slashes */ | |
393 | p = skip_leading_chars(p, "/"); | |
394 | ||
395 | s = unit_name_escape(p); | |
396 | } | |
397 | if (!s) | |
398 | return -ENOMEM; | |
399 | ||
400 | *ret = s; | |
401 | return 0; | |
402 | } | |
403 | ||
404 | int unit_name_path_unescape(const char *f, char **ret) { | |
405 | char *s; | |
406 | int r; | |
407 | ||
408 | assert(f); | |
409 | ||
410 | if (isempty(f)) | |
411 | return -EINVAL; | |
412 | ||
413 | if (streq(f, "-")) { | |
414 | s = strdup("/"); | |
415 | if (!s) | |
416 | return -ENOMEM; | |
417 | } else { | |
418 | char *w; | |
419 | ||
420 | r = unit_name_unescape(f, &w); | |
421 | if (r < 0) | |
422 | return r; | |
423 | ||
424 | /* Don't accept trailing or leading slashes */ | |
425 | if (startswith(w, "/") || endswith(w, "/")) { | |
426 | free(w); | |
427 | return -EINVAL; | |
428 | } | |
429 | ||
430 | /* Prefix a slash again */ | |
431 | s = strappend("/", w); | |
432 | free(w); | |
433 | if (!s) | |
434 | return -ENOMEM; | |
435 | ||
436 | if (!path_is_safe(s)) { | |
437 | free(s); | |
438 | return -EINVAL; | |
439 | } | |
440 | } | |
441 | ||
442 | if (ret) | |
443 | *ret = s; | |
444 | else | |
445 | free(s); | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | int unit_name_replace_instance(const char *f, const char *i, char **ret) { | |
451 | const char *p, *e; | |
452 | char *s; | |
453 | size_t a, b; | |
454 | ||
455 | assert(f); | |
456 | assert(i); | |
457 | assert(ret); | |
458 | ||
459 | if (!unit_name_is_valid(f, UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) | |
460 | return -EINVAL; | |
461 | if (!unit_instance_is_valid(i)) | |
462 | return -EINVAL; | |
463 | ||
464 | assert_se(p = strchr(f, '@')); | |
465 | assert_se(e = strrchr(f, '.')); | |
466 | ||
467 | a = p - f; | |
468 | b = strlen(i); | |
469 | ||
470 | s = new(char, a + 1 + b + strlen(e) + 1); | |
471 | if (!s) | |
472 | return -ENOMEM; | |
473 | ||
474 | strcpy(mempcpy(mempcpy(s, f, a + 1), i, b), e); | |
475 | ||
476 | *ret = s; | |
477 | return 0; | |
478 | } | |
479 | ||
480 | int unit_name_template(const char *f, char **ret) { | |
481 | const char *p, *e; | |
482 | char *s; | |
483 | size_t a; | |
484 | ||
485 | assert(f); | |
486 | assert(ret); | |
487 | ||
488 | if (!unit_name_is_valid(f, UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) | |
489 | return -EINVAL; | |
490 | ||
491 | assert_se(p = strchr(f, '@')); | |
492 | assert_se(e = strrchr(f, '.')); | |
493 | ||
494 | a = p - f; | |
495 | ||
496 | s = new(char, a + 1 + strlen(e) + 1); | |
497 | if (!s) | |
498 | return -ENOMEM; | |
499 | ||
500 | strcpy(mempcpy(s, f, a + 1), e); | |
501 | ||
502 | *ret = s; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | int unit_name_from_path(const char *path, const char *suffix, char **ret) { | |
507 | _cleanup_free_ char *p = NULL; | |
508 | char *s = NULL; | |
509 | int r; | |
510 | ||
511 | assert(path); | |
512 | assert(suffix); | |
513 | assert(ret); | |
514 | ||
515 | if (!unit_suffix_is_valid(suffix)) | |
516 | return -EINVAL; | |
517 | ||
518 | r = unit_name_path_escape(path, &p); | |
519 | if (r < 0) | |
520 | return r; | |
521 | ||
522 | s = strappend(p, suffix); | |
523 | if (!s) | |
524 | return -ENOMEM; | |
525 | ||
526 | *ret = s; | |
527 | return 0; | |
528 | } | |
529 | ||
530 | int unit_name_from_path_instance(const char *prefix, const char *path, const char *suffix, char **ret) { | |
531 | _cleanup_free_ char *p = NULL; | |
532 | char *s; | |
533 | int r; | |
534 | ||
535 | assert(prefix); | |
536 | assert(path); | |
537 | assert(suffix); | |
538 | assert(ret); | |
539 | ||
540 | if (!unit_prefix_is_valid(prefix)) | |
541 | return -EINVAL; | |
542 | ||
543 | if (!unit_suffix_is_valid(suffix)) | |
544 | return -EINVAL; | |
545 | ||
546 | r = unit_name_path_escape(path, &p); | |
547 | if (r < 0) | |
548 | return r; | |
549 | ||
550 | s = strjoin(prefix, "@", p, suffix); | |
551 | if (!s) | |
552 | return -ENOMEM; | |
553 | ||
554 | *ret = s; | |
555 | return 0; | |
556 | } | |
557 | ||
558 | int unit_name_to_path(const char *name, char **ret) { | |
559 | _cleanup_free_ char *prefix = NULL; | |
560 | int r; | |
561 | ||
562 | assert(name); | |
563 | ||
564 | r = unit_name_to_prefix(name, &prefix); | |
565 | if (r < 0) | |
566 | return r; | |
567 | ||
568 | return unit_name_path_unescape(prefix, ret); | |
569 | } | |
570 | ||
571 | static char *do_escape_mangle(const char *f, UnitNameMangle allow_globs, char *t) { | |
572 | const char *valid_chars; | |
573 | ||
574 | assert(f); | |
575 | assert(IN_SET(allow_globs, UNIT_NAME_GLOB, UNIT_NAME_NOGLOB)); | |
576 | assert(t); | |
577 | ||
578 | /* We'll only escape the obvious characters here, to play | |
579 | * safe. */ | |
580 | ||
581 | valid_chars = allow_globs == UNIT_NAME_GLOB ? VALID_CHARS_GLOB : VALID_CHARS_WITH_AT; | |
582 | ||
583 | for (; *f; f++) { | |
584 | if (*f == '/') | |
585 | *(t++) = '-'; | |
586 | else if (!strchr(valid_chars, *f)) | |
587 | t = do_escape_char(*f, t); | |
588 | else | |
589 | *(t++) = *f; | |
590 | } | |
591 | ||
592 | return t; | |
593 | } | |
594 | ||
595 | /** | |
596 | * Convert a string to a unit name. /dev/blah is converted to dev-blah.device, | |
597 | * /blah/blah is converted to blah-blah.mount, anything else is left alone, | |
598 | * except that @suffix is appended if a valid unit suffix is not present. | |
599 | * | |
600 | * If @allow_globs, globs characters are preserved. Otherwise, they are escaped. | |
601 | */ | |
602 | int unit_name_mangle_with_suffix(const char *name, UnitNameMangle allow_globs, const char *suffix, char **ret) { | |
603 | char *s, *t; | |
604 | int r; | |
605 | ||
606 | assert(name); | |
607 | assert(suffix); | |
608 | assert(ret); | |
609 | ||
610 | if (isempty(name)) /* We cannot mangle empty unit names to become valid, sorry. */ | |
611 | return -EINVAL; | |
612 | ||
613 | if (!unit_suffix_is_valid(suffix)) | |
614 | return -EINVAL; | |
615 | ||
616 | /* Already a fully valid unit name? If so, no mangling is necessary... */ | |
617 | if (unit_name_is_valid(name, UNIT_NAME_ANY)) | |
618 | goto good; | |
619 | ||
620 | /* Already a fully valid globbing expression? If so, no mangling is necessary either... */ | |
621 | if (allow_globs == UNIT_NAME_GLOB && | |
622 | string_is_glob(name) && | |
623 | in_charset(name, VALID_CHARS_GLOB)) | |
624 | goto good; | |
625 | ||
626 | if (is_device_path(name)) { | |
627 | r = unit_name_from_path(name, ".device", ret); | |
628 | if (r >= 0) | |
629 | return 1; | |
630 | if (r != -EINVAL) | |
631 | return r; | |
632 | } | |
633 | ||
634 | if (path_is_absolute(name)) { | |
635 | r = unit_name_from_path(name, ".mount", ret); | |
636 | if (r >= 0) | |
637 | return 1; | |
638 | if (r != -EINVAL) | |
639 | return r; | |
640 | } | |
641 | ||
642 | s = new(char, strlen(name) * 4 + strlen(suffix) + 1); | |
643 | if (!s) | |
644 | return -ENOMEM; | |
645 | ||
646 | t = do_escape_mangle(name, allow_globs, s); | |
647 | *t = 0; | |
648 | ||
649 | /* Append a suffix if it doesn't have any, but only if this is not a glob, so that we can allow "foo.*" as a | |
650 | * valid glob. */ | |
651 | if ((allow_globs != UNIT_NAME_GLOB || !string_is_glob(s)) && unit_name_to_type(s) < 0) | |
652 | strcpy(t, suffix); | |
653 | ||
654 | *ret = s; | |
655 | return 1; | |
656 | ||
657 | good: | |
658 | s = strdup(name); | |
659 | if (!s) | |
660 | return -ENOMEM; | |
661 | ||
662 | *ret = s; | |
663 | return 0; | |
664 | } | |
665 | ||
666 | int slice_build_parent_slice(const char *slice, char **ret) { | |
667 | char *s, *dash; | |
668 | int r; | |
669 | ||
670 | assert(slice); | |
671 | assert(ret); | |
672 | ||
673 | if (!slice_name_is_valid(slice)) | |
674 | return -EINVAL; | |
675 | ||
676 | if (streq(slice, "-.slice")) { | |
677 | *ret = NULL; | |
678 | return 0; | |
679 | } | |
680 | ||
681 | s = strdup(slice); | |
682 | if (!s) | |
683 | return -ENOMEM; | |
684 | ||
685 | dash = strrchr(s, '-'); | |
686 | if (dash) | |
687 | strcpy(dash, ".slice"); | |
688 | else { | |
689 | r = free_and_strdup(&s, "-.slice"); | |
690 | if (r < 0) { | |
691 | free(s); | |
692 | return r; | |
693 | } | |
694 | } | |
695 | ||
696 | *ret = s; | |
697 | return 1; | |
698 | } | |
699 | ||
700 | int slice_build_subslice(const char *slice, const char*name, char **ret) { | |
701 | char *subslice; | |
702 | ||
703 | assert(slice); | |
704 | assert(name); | |
705 | assert(ret); | |
706 | ||
707 | if (!slice_name_is_valid(slice)) | |
708 | return -EINVAL; | |
709 | ||
710 | if (!unit_prefix_is_valid(name)) | |
711 | return -EINVAL; | |
712 | ||
713 | if (streq(slice, "-.slice")) | |
714 | subslice = strappend(name, ".slice"); | |
715 | else { | |
716 | char *e; | |
717 | ||
718 | assert_se(e = endswith(slice, ".slice")); | |
719 | ||
720 | subslice = new(char, (e - slice) + 1 + strlen(name) + 6 + 1); | |
721 | if (!subslice) | |
722 | return -ENOMEM; | |
723 | ||
724 | stpcpy(stpcpy(stpcpy(mempcpy(subslice, slice, e - slice), "-"), name), ".slice"); | |
725 | } | |
726 | ||
727 | *ret = subslice; | |
728 | return 0; | |
729 | } | |
730 | ||
731 | bool slice_name_is_valid(const char *name) { | |
732 | const char *p, *e; | |
733 | bool dash = false; | |
734 | ||
735 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN)) | |
736 | return false; | |
737 | ||
738 | if (streq(name, "-.slice")) | |
739 | return true; | |
740 | ||
741 | e = endswith(name, ".slice"); | |
742 | if (!e) | |
743 | return false; | |
744 | ||
745 | for (p = name; p < e; p++) { | |
746 | ||
747 | if (*p == '-') { | |
748 | ||
749 | /* Don't allow initial dash */ | |
750 | if (p == name) | |
751 | return false; | |
752 | ||
753 | /* Don't allow multiple dashes */ | |
754 | if (dash) | |
755 | return false; | |
756 | ||
757 | dash = true; | |
758 | } else | |
759 | dash = false; | |
760 | } | |
761 | ||
762 | /* Don't allow trailing hash */ | |
763 | if (dash) | |
764 | return false; | |
765 | ||
766 | return true; | |
767 | } |