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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
36697dc0 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2012 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 | ||
11c3a366 | 21 | #include <alloca.h> |
9dfa81a0 | 22 | #include <ctype.h> |
11c3a366 | 23 | #include <errno.h> |
c0aebb4b | 24 | #include <limits.h> |
11c3a366 TA |
25 | #include <stddef.h> |
26 | #include <stdio.h> | |
0d536673 | 27 | #include <stdio_ext.h> |
36697dc0 LP |
28 | #include <stdlib.h> |
29 | #include <string.h> | |
48d26c01 | 30 | #include <sys/mman.h> |
11c3a366 | 31 | #include <time.h> |
36697dc0 | 32 | |
b5efdb8a | 33 | #include "alloc-util.h" |
36697dc0 | 34 | #include "calendarspec.h" |
0d39fa9c | 35 | #include "fileio.h" |
11c3a366 | 36 | #include "macro.h" |
93cc7779 | 37 | #include "parse-util.h" |
dccca82b | 38 | #include "process-util.h" |
cf0fbc49 | 39 | #include "string-util.h" |
48d26c01 | 40 | #include "time-util.h" |
36697dc0 | 41 | |
a2eb5ea7 DC |
42 | #define BITS_WEEKDAYS 127 |
43 | #define MIN_YEAR 1970 | |
44 | #define MAX_YEAR 2199 | |
489464d0 | 45 | |
36697dc0 LP |
46 | static void free_chain(CalendarComponent *c) { |
47 | CalendarComponent *n; | |
48 | ||
49 | while (c) { | |
50 | n = c->next; | |
51 | free(c); | |
52 | c = n; | |
53 | } | |
54 | } | |
55 | ||
7c123d49 | 56 | CalendarSpec* calendar_spec_free(CalendarSpec *c) { |
0b76b4d8 LP |
57 | |
58 | if (!c) | |
7c123d49 | 59 | return NULL; |
36697dc0 LP |
60 | |
61 | free_chain(c->year); | |
62 | free_chain(c->month); | |
63 | free_chain(c->day); | |
64 | free_chain(c->hour); | |
65 | free_chain(c->minute); | |
436dd70f | 66 | free_chain(c->microsecond); |
48d26c01 | 67 | free(c->timezone); |
36697dc0 | 68 | |
7c123d49 | 69 | return mfree(c); |
36697dc0 LP |
70 | } |
71 | ||
72 | static int component_compare(const void *_a, const void *_b) { | |
73 | CalendarComponent * const *a = _a, * const *b = _b; | |
74 | ||
e78fce48 | 75 | if ((*a)->start < (*b)->start) |
36697dc0 | 76 | return -1; |
e78fce48 | 77 | if ((*a)->start > (*b)->start) |
36697dc0 LP |
78 | return 1; |
79 | ||
e78fce48 | 80 | if ((*a)->stop < (*b)->stop) |
a2eb5ea7 | 81 | return -1; |
e78fce48 | 82 | if ((*a)->stop > (*b)->stop) |
a2eb5ea7 DC |
83 | return 1; |
84 | ||
36697dc0 LP |
85 | if ((*a)->repeat < (*b)->repeat) |
86 | return -1; | |
87 | if ((*a)->repeat > (*b)->repeat) | |
88 | return 1; | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
a2eb5ea7 | 93 | static void normalize_chain(CalendarComponent **c) { |
36697dc0 LP |
94 | unsigned n = 0, k; |
95 | CalendarComponent **b, *i, **j, *next; | |
96 | ||
97 | assert(c); | |
98 | ||
a2eb5ea7 | 99 | for (i = *c; i; i = i->next) { |
36697dc0 LP |
100 | n++; |
101 | ||
a2eb5ea7 | 102 | /* |
e78fce48 | 103 | * While we're counting the chain, also normalize `stop` |
a2eb5ea7 DC |
104 | * so the length of the range is a multiple of `repeat` |
105 | */ | |
c0aebb4b | 106 | if (i->stop > i->start && i->repeat > 0) |
e78fce48 | 107 | i->stop -= (i->stop - i->start) % i->repeat; |
a2eb5ea7 DC |
108 | |
109 | } | |
110 | ||
36697dc0 LP |
111 | if (n <= 1) |
112 | return; | |
113 | ||
114 | j = b = alloca(sizeof(CalendarComponent*) * n); | |
115 | for (i = *c; i; i = i->next) | |
116 | *(j++) = i; | |
117 | ||
118 | qsort(b, n, sizeof(CalendarComponent*), component_compare); | |
119 | ||
120 | b[n-1]->next = NULL; | |
121 | next = b[n-1]; | |
122 | ||
123 | /* Drop non-unique entries */ | |
124 | for (k = n-1; k > 0; k--) { | |
963e3d83 | 125 | if (component_compare(&b[k-1], &next) == 0) { |
36697dc0 LP |
126 | free(b[k-1]); |
127 | continue; | |
128 | } | |
129 | ||
130 | b[k-1]->next = next; | |
131 | next = b[k-1]; | |
132 | } | |
133 | ||
134 | *c = next; | |
135 | } | |
136 | ||
137 | static void fix_year(CalendarComponent *c) { | |
138 | /* Turns 12 → 2012, 89 → 1989 */ | |
139 | ||
9ed794a3 | 140 | while (c) { |
e78fce48 DC |
141 | if (c->start >= 0 && c->start < 70) |
142 | c->start += 2000; | |
36697dc0 | 143 | |
e78fce48 DC |
144 | if (c->stop >= 0 && c->stop < 70) |
145 | c->stop += 2000; | |
a2eb5ea7 | 146 | |
e78fce48 DC |
147 | if (c->start >= 70 && c->start < 100) |
148 | c->start += 1900; | |
36697dc0 | 149 | |
e78fce48 DC |
150 | if (c->stop >= 70 && c->stop < 100) |
151 | c->stop += 1900; | |
a2eb5ea7 | 152 | |
482f3b54 | 153 | c = c->next; |
36697dc0 LP |
154 | } |
155 | } | |
156 | ||
157 | int calendar_spec_normalize(CalendarSpec *c) { | |
158 | assert(c); | |
159 | ||
10e859a2 LP |
160 | if (streq_ptr(c->timezone, "UTC")) { |
161 | c->utc = true; | |
162 | c->timezone = mfree(c->timezone); | |
163 | } | |
164 | ||
489464d0 | 165 | if (c->weekdays_bits <= 0 || c->weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
166 | c->weekdays_bits = -1; |
167 | ||
8ea80351 DC |
168 | if (c->end_of_month && !c->day) |
169 | c->end_of_month = false; | |
170 | ||
36697dc0 LP |
171 | fix_year(c->year); |
172 | ||
a2eb5ea7 DC |
173 | normalize_chain(&c->year); |
174 | normalize_chain(&c->month); | |
175 | normalize_chain(&c->day); | |
176 | normalize_chain(&c->hour); | |
177 | normalize_chain(&c->minute); | |
178 | normalize_chain(&c->microsecond); | |
36697dc0 LP |
179 | |
180 | return 0; | |
181 | } | |
182 | ||
c58b1b3a | 183 | _pure_ static bool chain_valid(CalendarComponent *c, int from, int to, bool end_of_month) { |
36697dc0 LP |
184 | if (!c) |
185 | return true; | |
186 | ||
a2eb5ea7 DC |
187 | /* Forbid dates more than 28 days from the end of the month */ |
188 | if (end_of_month) | |
189 | to -= 3; | |
190 | ||
e78fce48 | 191 | if (c->start < from || c->start > to) |
36697dc0 LP |
192 | return false; |
193 | ||
8ea80351 DC |
194 | /* |
195 | * c->repeat must be short enough so at least one repetition may | |
196 | * occur before the end of the interval. For dates scheduled | |
e78fce48 | 197 | * relative to the end of the month, c->start and c->stop |
a2eb5ea7 | 198 | * correspond to the Nth last day of the month. |
8ea80351 | 199 | */ |
e78fce48 DC |
200 | if (c->stop >= 0) { |
201 | if (c->stop < from || c ->stop > to) | |
a2eb5ea7 | 202 | return false; |
8ea80351 | 203 | |
e78fce48 | 204 | if (c->start + c->repeat > c->stop) |
a2eb5ea7 DC |
205 | return false; |
206 | } else { | |
e78fce48 | 207 | if (end_of_month && c->start - c->repeat < from) |
a2eb5ea7 DC |
208 | return false; |
209 | ||
e78fce48 | 210 | if (!end_of_month && c->start + c->repeat > to) |
a2eb5ea7 DC |
211 | return false; |
212 | } | |
36697dc0 LP |
213 | |
214 | if (c->next) | |
c58b1b3a | 215 | return chain_valid(c->next, from, to, end_of_month); |
36697dc0 LP |
216 | |
217 | return true; | |
218 | } | |
219 | ||
44a6b1b6 | 220 | _pure_ bool calendar_spec_valid(CalendarSpec *c) { |
36697dc0 LP |
221 | assert(c); |
222 | ||
489464d0 | 223 | if (c->weekdays_bits > BITS_WEEKDAYS) |
36697dc0 LP |
224 | return false; |
225 | ||
8ea80351 | 226 | if (!chain_valid(c->year, MIN_YEAR, MAX_YEAR, false)) |
36697dc0 LP |
227 | return false; |
228 | ||
8ea80351 | 229 | if (!chain_valid(c->month, 1, 12, false)) |
36697dc0 LP |
230 | return false; |
231 | ||
8ea80351 | 232 | if (!chain_valid(c->day, 1, 31, c->end_of_month)) |
36697dc0 LP |
233 | return false; |
234 | ||
8ea80351 | 235 | if (!chain_valid(c->hour, 0, 23, false)) |
36697dc0 LP |
236 | return false; |
237 | ||
8ea80351 | 238 | if (!chain_valid(c->minute, 0, 59, false)) |
36697dc0 LP |
239 | return false; |
240 | ||
8ea80351 | 241 | if (!chain_valid(c->microsecond, 0, 60*USEC_PER_SEC-1, false)) |
36697dc0 LP |
242 | return false; |
243 | ||
244 | return true; | |
245 | } | |
246 | ||
247 | static void format_weekdays(FILE *f, const CalendarSpec *c) { | |
248 | static const char *const days[] = { | |
249 | "Mon", | |
250 | "Tue", | |
251 | "Wed", | |
252 | "Thu", | |
253 | "Fri", | |
254 | "Sat", | |
255 | "Sun" | |
256 | }; | |
257 | ||
258 | int l, x; | |
e638d050 | 259 | bool need_comma = false; |
36697dc0 LP |
260 | |
261 | assert(f); | |
262 | assert(c); | |
489464d0 | 263 | assert(c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS); |
36697dc0 LP |
264 | |
265 | for (x = 0, l = -1; x < (int) ELEMENTSOF(days); x++) { | |
266 | ||
267 | if (c->weekdays_bits & (1 << x)) { | |
268 | ||
269 | if (l < 0) { | |
e638d050 | 270 | if (need_comma) |
0d536673 | 271 | fputc(',', f); |
36697dc0 | 272 | else |
e638d050 | 273 | need_comma = true; |
36697dc0 | 274 | |
0d536673 | 275 | fputs(days[x], f); |
36697dc0 LP |
276 | l = x; |
277 | } | |
278 | ||
279 | } else if (l >= 0) { | |
280 | ||
281 | if (x > l + 1) { | |
0d536673 LP |
282 | fputs(x > l + 2 ? ".." : ",", f); |
283 | fputs(days[x-1], f); | |
36697dc0 LP |
284 | } |
285 | ||
286 | l = -1; | |
287 | } | |
288 | } | |
289 | ||
290 | if (l >= 0 && x > l + 1) { | |
0d536673 LP |
291 | fputs(x > l + 2 ? ".." : ",", f); |
292 | fputs(days[x-1], f); | |
36697dc0 LP |
293 | } |
294 | } | |
295 | ||
436dd70f | 296 | static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) { |
7c250321 | 297 | int d = usec ? (int) USEC_PER_SEC : 1; |
9904dc00 | 298 | |
36697dc0 LP |
299 | assert(f); |
300 | ||
301 | if (!c) { | |
0d536673 | 302 | fputc('*', f); |
36697dc0 LP |
303 | return; |
304 | } | |
305 | ||
482f3b54 | 306 | if (usec && c->start == 0 && c->repeat == USEC_PER_SEC && !c->next) { |
0d536673 | 307 | fputc('*', f); |
482f3b54 DC |
308 | return; |
309 | } | |
310 | ||
e78fce48 | 311 | assert(c->start >= 0); |
7c250321 | 312 | |
e78fce48 DC |
313 | fprintf(f, "%0*i", space, c->start / d); |
314 | if (c->start % d > 0) | |
315 | fprintf(f, ".%06i", c->start % d); | |
7c250321 | 316 | |
e78fce48 DC |
317 | if (c->stop > 0) |
318 | fprintf(f, "..%0*i", space, c->stop / d); | |
319 | if (c->stop % d > 0) | |
320 | fprintf(f, ".%06i", c->stop % d); | |
a2eb5ea7 | 321 | |
e78fce48 | 322 | if (c->repeat > 0 && !(c->stop > 0 && c->repeat == d)) |
7c250321 | 323 | fprintf(f, "/%i", c->repeat / d); |
a2eb5ea7 | 324 | if (c->repeat % d > 0) |
7c250321 | 325 | fprintf(f, ".%06i", c->repeat % d); |
36697dc0 | 326 | |
a2eb5ea7 | 327 | if (c->next) { |
0d536673 | 328 | fputc(',', f); |
436dd70f | 329 | format_chain(f, space, c->next, usec); |
36697dc0 LP |
330 | } |
331 | } | |
332 | ||
333 | int calendar_spec_to_string(const CalendarSpec *c, char **p) { | |
334 | char *buf = NULL; | |
335 | size_t sz = 0; | |
336 | FILE *f; | |
dacd6cee | 337 | int r; |
36697dc0 LP |
338 | |
339 | assert(c); | |
340 | assert(p); | |
341 | ||
342 | f = open_memstream(&buf, &sz); | |
343 | if (!f) | |
344 | return -ENOMEM; | |
345 | ||
0d536673 LP |
346 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
347 | ||
489464d0 | 348 | if (c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS) { |
36697dc0 | 349 | format_weekdays(f, c); |
0d536673 | 350 | fputc(' ', f); |
36697dc0 LP |
351 | } |
352 | ||
436dd70f | 353 | format_chain(f, 4, c->year, false); |
0d536673 | 354 | fputc('-', f); |
436dd70f | 355 | format_chain(f, 2, c->month, false); |
0d536673 | 356 | fputc(c->end_of_month ? '~' : '-', f); |
436dd70f | 357 | format_chain(f, 2, c->day, false); |
0d536673 | 358 | fputc(' ', f); |
436dd70f | 359 | format_chain(f, 2, c->hour, false); |
0d536673 | 360 | fputc(':', f); |
436dd70f | 361 | format_chain(f, 2, c->minute, false); |
0d536673 | 362 | fputc(':', f); |
482f3b54 | 363 | format_chain(f, 2, c->microsecond, true); |
36697dc0 | 364 | |
51ffa239 | 365 | if (c->utc) |
0d536673 | 366 | fputs(" UTC", f); |
48d26c01 | 367 | else if (c->timezone != NULL) { |
0d536673 LP |
368 | fputc(' ', f); |
369 | fputs(c->timezone, f); | |
48d26c01 | 370 | } else if (IN_SET(c->dst, 0, 1)) { |
21b3a0fc LP |
371 | |
372 | /* If daylight saving is explicitly on or off, let's show the used timezone. */ | |
373 | ||
374 | tzset(); | |
375 | ||
376 | if (!isempty(tzname[c->dst])) { | |
0d536673 LP |
377 | fputc(' ', f); |
378 | fputs(tzname[c->dst], f); | |
21b3a0fc LP |
379 | } |
380 | } | |
51ffa239 | 381 | |
dacd6cee LP |
382 | r = fflush_and_check(f); |
383 | if (r < 0) { | |
36697dc0 LP |
384 | free(buf); |
385 | fclose(f); | |
dacd6cee | 386 | return r; |
36697dc0 LP |
387 | } |
388 | ||
389 | fclose(f); | |
390 | ||
391 | *p = buf; | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static int parse_weekdays(const char **p, CalendarSpec *c) { | |
396 | static const struct { | |
397 | const char *name; | |
398 | const int nr; | |
399 | } day_nr[] = { | |
400 | { "Monday", 0 }, | |
401 | { "Mon", 0 }, | |
402 | { "Tuesday", 1 }, | |
403 | { "Tue", 1 }, | |
404 | { "Wednesday", 2 }, | |
405 | { "Wed", 2 }, | |
406 | { "Thursday", 3 }, | |
407 | { "Thu", 3 }, | |
408 | { "Friday", 4 }, | |
409 | { "Fri", 4 }, | |
410 | { "Saturday", 5 }, | |
411 | { "Sat", 5 }, | |
412 | { "Sunday", 6 }, | |
413 | { "Sun", 6 } | |
414 | }; | |
415 | ||
416 | int l = -1; | |
417 | bool first = true; | |
418 | ||
419 | assert(p); | |
420 | assert(*p); | |
421 | assert(c); | |
422 | ||
423 | for (;;) { | |
424 | unsigned i; | |
425 | ||
36697dc0 LP |
426 | for (i = 0; i < ELEMENTSOF(day_nr); i++) { |
427 | size_t skip; | |
428 | ||
429 | if (!startswith_no_case(*p, day_nr[i].name)) | |
430 | continue; | |
431 | ||
432 | skip = strlen(day_nr[i].name); | |
433 | ||
4c701096 | 434 | if (!IN_SET((*p)[skip], 0, '-', '.', ',', ' ')) |
36697dc0 LP |
435 | return -EINVAL; |
436 | ||
437 | c->weekdays_bits |= 1 << day_nr[i].nr; | |
438 | ||
439 | if (l >= 0) { | |
440 | int j; | |
441 | ||
442 | if (l > day_nr[i].nr) | |
443 | return -EINVAL; | |
444 | ||
445 | for (j = l + 1; j < day_nr[i].nr; j++) | |
446 | c->weekdays_bits |= 1 << j; | |
447 | } | |
448 | ||
449 | *p += skip; | |
450 | break; | |
451 | } | |
452 | ||
453 | /* Couldn't find this prefix, so let's assume the | |
454 | weekday was not specified and let's continue with | |
455 | the date */ | |
456 | if (i >= ELEMENTSOF(day_nr)) | |
457 | return first ? 0 : -EINVAL; | |
458 | ||
459 | /* We reached the end of the string */ | |
460 | if (**p == 0) | |
461 | return 0; | |
462 | ||
463 | /* We reached the end of the weekday spec part */ | |
464 | if (**p == ' ') { | |
465 | *p += strspn(*p, " "); | |
466 | return 0; | |
467 | } | |
468 | ||
e638d050 DC |
469 | if (**p == '.') { |
470 | if (l >= 0) | |
471 | return -EINVAL; | |
472 | ||
473 | if ((*p)[1] != '.') | |
474 | return -EINVAL; | |
475 | ||
476 | l = day_nr[i].nr; | |
6bae2fd4 | 477 | *p += 2; |
e638d050 DC |
478 | |
479 | /* Support ranges with "-" for backwards compatibility */ | |
480 | } else if (**p == '-') { | |
36697dc0 LP |
481 | if (l >= 0) |
482 | return -EINVAL; | |
483 | ||
484 | l = day_nr[i].nr; | |
6bae2fd4 DC |
485 | *p += 1; |
486 | ||
487 | } else if (**p == ',') { | |
36697dc0 | 488 | l = -1; |
6bae2fd4 DC |
489 | *p += 1; |
490 | } | |
491 | ||
482f3b54 | 492 | /* Allow a trailing comma but not an open range */ |
4c701096 | 493 | if (IN_SET(**p, 0, ' ')) { |
6bae2fd4 DC |
494 | *p += strspn(*p, " "); |
495 | return l < 0 ? 0 : -EINVAL; | |
496 | } | |
36697dc0 | 497 | |
36697dc0 LP |
498 | first = false; |
499 | } | |
500 | } | |
501 | ||
d80e5b74 ZJS |
502 | static int parse_one_number(const char *p, const char **e, unsigned long *ret) { |
503 | char *ee = NULL; | |
504 | unsigned long value; | |
505 | ||
506 | errno = 0; | |
507 | value = strtoul(p, &ee, 10); | |
508 | if (errno > 0) | |
509 | return -errno; | |
510 | if (ee == p) | |
511 | return -EINVAL; | |
512 | ||
513 | *ret = value; | |
514 | *e = ee; | |
515 | return 0; | |
516 | } | |
517 | ||
c0aebb4b | 518 | static int parse_component_decimal(const char **p, bool usec, int *res) { |
436dd70f HV |
519 | unsigned long value; |
520 | const char *e = NULL; | |
436dd70f | 521 | int r; |
36697dc0 | 522 | |
9dfa81a0 DC |
523 | if (!isdigit(**p)) |
524 | return -EINVAL; | |
525 | ||
d80e5b74 ZJS |
526 | r = parse_one_number(*p, &e, &value); |
527 | if (r < 0) | |
528 | return r; | |
36697dc0 | 529 | |
436dd70f HV |
530 | if (usec) { |
531 | if (value * USEC_PER_SEC / USEC_PER_SEC != value) | |
36697dc0 LP |
532 | return -ERANGE; |
533 | ||
436dd70f | 534 | value *= USEC_PER_SEC; |
436dd70f | 535 | |
60bf5836 DC |
536 | /* One "." is a decimal point, but ".." is a range separator */ |
537 | if (e[0] == '.' && e[1] != '.') { | |
538 | unsigned add; | |
36ff0c97 | 539 | |
436dd70f HV |
540 | e++; |
541 | r = parse_fractional_part_u(&e, 6, &add); | |
542 | if (r < 0) | |
543 | return r; | |
544 | ||
545 | if (add + value < value) | |
546 | return -ERANGE; | |
547 | value += add; | |
548 | } | |
549 | } | |
550 | ||
c0aebb4b DC |
551 | if (value > INT_MAX) |
552 | return -ERANGE; | |
553 | ||
436dd70f HV |
554 | *p = e; |
555 | *res = value; | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
32b52369 DC |
560 | static int const_chain(int value, CalendarComponent **c) { |
561 | CalendarComponent *cc = NULL; | |
562 | ||
563 | assert(c); | |
564 | ||
565 | cc = new0(CalendarComponent, 1); | |
566 | if (!cc) | |
567 | return -ENOMEM; | |
568 | ||
e78fce48 DC |
569 | cc->start = value; |
570 | cc->stop = -1; | |
32b52369 DC |
571 | cc->repeat = 0; |
572 | cc->next = *c; | |
573 | ||
574 | *c = cc; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
d80e5b74 ZJS |
579 | static int calendarspec_from_time_t(CalendarSpec *c, time_t time) { |
580 | struct tm tm; | |
581 | CalendarComponent *year = NULL, *month = NULL, *day = NULL, *hour = NULL, *minute = NULL, *us = NULL; | |
582 | int r; | |
583 | ||
584 | assert_se(gmtime_r(&time, &tm)); | |
585 | ||
586 | r = const_chain(tm.tm_year + 1900, &year); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
590 | r = const_chain(tm.tm_mon + 1, &month); | |
591 | if (r < 0) | |
592 | return r; | |
593 | ||
594 | r = const_chain(tm.tm_mday, &day); | |
595 | if (r < 0) | |
596 | return r; | |
597 | ||
598 | r = const_chain(tm.tm_hour, &hour); | |
599 | if (r < 0) | |
600 | return r; | |
601 | ||
602 | r = const_chain(tm.tm_min, &minute); | |
603 | if (r < 0) | |
604 | return r; | |
605 | ||
606 | r = const_chain(tm.tm_sec * USEC_PER_SEC, &us); | |
607 | if (r < 0) | |
608 | return r; | |
609 | ||
610 | c->utc = true; | |
611 | c->year = year; | |
612 | c->month = month; | |
613 | c->day = day; | |
614 | c->hour = hour; | |
615 | c->minute = minute; | |
616 | c->microsecond = us; | |
617 | return 0; | |
618 | } | |
619 | ||
436dd70f | 620 | static int prepend_component(const char **p, bool usec, CalendarComponent **c) { |
c0aebb4b | 621 | int r, start, stop = -1, repeat = 0; |
436dd70f | 622 | CalendarComponent *cc; |
436dd70f HV |
623 | const char *e; |
624 | ||
625 | assert(p); | |
626 | assert(c); | |
627 | ||
628 | e = *p; | |
629 | ||
e78fce48 | 630 | r = parse_component_decimal(&e, usec, &start); |
436dd70f HV |
631 | if (r < 0) |
632 | return r; | |
633 | ||
a2eb5ea7 DC |
634 | if (e[0] == '.' && e[1] == '.') { |
635 | e += 2; | |
e78fce48 | 636 | r = parse_component_decimal(&e, usec, &stop); |
a2eb5ea7 DC |
637 | if (r < 0) |
638 | return r; | |
639 | ||
640 | repeat = usec ? USEC_PER_SEC : 1; | |
641 | } | |
642 | ||
436dd70f HV |
643 | if (*e == '/') { |
644 | e++; | |
645 | r = parse_component_decimal(&e, usec, &repeat); | |
646 | if (r < 0) | |
647 | return r; | |
648 | ||
649 | if (repeat == 0) | |
650 | return -ERANGE; | |
36697dc0 LP |
651 | } |
652 | ||
4c701096 | 653 | if (!IN_SET(*e, 0, ' ', ',', '-', '~', ':')) |
36697dc0 LP |
654 | return -EINVAL; |
655 | ||
656 | cc = new0(CalendarComponent, 1); | |
657 | if (!cc) | |
658 | return -ENOMEM; | |
659 | ||
e78fce48 DC |
660 | cc->start = start; |
661 | cc->stop = stop; | |
36697dc0 LP |
662 | cc->repeat = repeat; |
663 | cc->next = *c; | |
664 | ||
665 | *p = e; | |
666 | *c = cc; | |
667 | ||
668 | if (*e ==',') { | |
669 | *p += 1; | |
436dd70f | 670 | return prepend_component(p, usec, c); |
36697dc0 LP |
671 | } |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
436dd70f | 676 | static int parse_chain(const char **p, bool usec, CalendarComponent **c) { |
36697dc0 LP |
677 | const char *t; |
678 | CalendarComponent *cc = NULL; | |
679 | int r; | |
680 | ||
681 | assert(p); | |
682 | assert(c); | |
683 | ||
684 | t = *p; | |
685 | ||
686 | if (t[0] == '*') { | |
436dd70f HV |
687 | if (usec) { |
688 | r = const_chain(0, c); | |
689 | if (r < 0) | |
690 | return r; | |
691 | (*c)->repeat = USEC_PER_SEC; | |
692 | } else | |
693 | *c = NULL; | |
694 | ||
36697dc0 | 695 | *p = t + 1; |
36697dc0 LP |
696 | return 0; |
697 | } | |
698 | ||
436dd70f | 699 | r = prepend_component(&t, usec, &cc); |
36697dc0 LP |
700 | if (r < 0) { |
701 | free_chain(cc); | |
702 | return r; | |
703 | } | |
704 | ||
705 | *p = t; | |
706 | *c = cc; | |
707 | return 0; | |
708 | } | |
709 | ||
36697dc0 LP |
710 | static int parse_date(const char **p, CalendarSpec *c) { |
711 | const char *t; | |
712 | int r; | |
713 | CalendarComponent *first, *second, *third; | |
714 | ||
715 | assert(p); | |
716 | assert(*p); | |
717 | assert(c); | |
718 | ||
719 | t = *p; | |
720 | ||
721 | if (*t == 0) | |
722 | return 0; | |
723 | ||
d80e5b74 ZJS |
724 | /* @TIMESTAMP — UNIX time in seconds since the epoch */ |
725 | if (*t == '@') { | |
726 | unsigned long value; | |
727 | time_t time; | |
728 | ||
729 | r = parse_one_number(t + 1, &t, &value); | |
730 | if (r < 0) | |
731 | return r; | |
732 | ||
733 | time = value; | |
734 | if ((unsigned long) time != value) | |
735 | return -ERANGE; | |
736 | ||
737 | r = calendarspec_from_time_t(c, time); | |
738 | if (r < 0) | |
739 | return r; | |
740 | ||
741 | *p = t; | |
742 | return 1; /* finito, don't parse H:M:S after that */ | |
743 | } | |
744 | ||
436dd70f | 745 | r = parse_chain(&t, false, &first); |
36697dc0 LP |
746 | if (r < 0) |
747 | return r; | |
748 | ||
749 | /* Already the end? A ':' as separator? In that case this was a time, not a date */ | |
4c701096 | 750 | if (IN_SET(*t, 0, ':')) { |
36697dc0 LP |
751 | free_chain(first); |
752 | return 0; | |
753 | } | |
754 | ||
8ea80351 DC |
755 | if (*t == '~') |
756 | c->end_of_month = true; | |
757 | else if (*t != '-') { | |
36697dc0 LP |
758 | free_chain(first); |
759 | return -EINVAL; | |
760 | } | |
761 | ||
762 | t++; | |
436dd70f | 763 | r = parse_chain(&t, false, &second); |
36697dc0 LP |
764 | if (r < 0) { |
765 | free_chain(first); | |
766 | return r; | |
767 | } | |
768 | ||
769 | /* Got two parts, hence it's month and day */ | |
4c701096 | 770 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
771 | *p = t + strspn(t, " "); |
772 | c->month = first; | |
773 | c->day = second; | |
774 | return 0; | |
fc2371c7 DC |
775 | } else if (c->end_of_month) { |
776 | free_chain(first); | |
777 | free_chain(second); | |
8ea80351 | 778 | return -EINVAL; |
fc2371c7 | 779 | } |
36697dc0 | 780 | |
8ea80351 DC |
781 | if (*t == '~') |
782 | c->end_of_month = true; | |
783 | else if (*t != '-') { | |
36697dc0 LP |
784 | free_chain(first); |
785 | free_chain(second); | |
786 | return -EINVAL; | |
787 | } | |
788 | ||
789 | t++; | |
436dd70f | 790 | r = parse_chain(&t, false, &third); |
36697dc0 LP |
791 | if (r < 0) { |
792 | free_chain(first); | |
793 | free_chain(second); | |
794 | return r; | |
795 | } | |
796 | ||
8ea80351 | 797 | /* Got three parts, hence it is year, month and day */ |
4c701096 | 798 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
799 | *p = t + strspn(t, " "); |
800 | c->year = first; | |
801 | c->month = second; | |
802 | c->day = third; | |
803 | return 0; | |
804 | } | |
805 | ||
806 | free_chain(first); | |
807 | free_chain(second); | |
808 | free_chain(third); | |
809 | return -EINVAL; | |
810 | } | |
811 | ||
519cffec | 812 | static int parse_calendar_time(const char **p, CalendarSpec *c) { |
36697dc0 LP |
813 | CalendarComponent *h = NULL, *m = NULL, *s = NULL; |
814 | const char *t; | |
815 | int r; | |
816 | ||
817 | assert(p); | |
818 | assert(*p); | |
819 | assert(c); | |
820 | ||
821 | t = *p; | |
822 | ||
408a51e1 DC |
823 | /* If no time is specified at all, then this means 00:00:00 */ |
824 | if (*t == 0) | |
825 | goto null_hour; | |
36697dc0 | 826 | |
436dd70f | 827 | r = parse_chain(&t, false, &h); |
36697dc0 LP |
828 | if (r < 0) |
829 | goto fail; | |
830 | ||
831 | if (*t != ':') { | |
832 | r = -EINVAL; | |
833 | goto fail; | |
834 | } | |
835 | ||
836 | t++; | |
436dd70f | 837 | r = parse_chain(&t, false, &m); |
36697dc0 LP |
838 | if (r < 0) |
839 | goto fail; | |
840 | ||
841 | /* Already at the end? Then it's hours and minutes, and seconds are 0 */ | |
c0df71fa DC |
842 | if (*t == 0) |
843 | goto null_second; | |
36697dc0 LP |
844 | |
845 | if (*t != ':') { | |
846 | r = -EINVAL; | |
847 | goto fail; | |
848 | } | |
849 | ||
850 | t++; | |
436dd70f | 851 | r = parse_chain(&t, true, &s); |
36697dc0 LP |
852 | if (r < 0) |
853 | goto fail; | |
854 | ||
855 | /* At the end? Then it's hours, minutes and seconds */ | |
856 | if (*t == 0) | |
857 | goto finish; | |
858 | ||
859 | r = -EINVAL; | |
860 | goto fail; | |
861 | ||
862 | null_hour: | |
863 | r = const_chain(0, &h); | |
864 | if (r < 0) | |
865 | goto fail; | |
866 | ||
867 | r = const_chain(0, &m); | |
868 | if (r < 0) | |
869 | goto fail; | |
870 | ||
871 | null_second: | |
872 | r = const_chain(0, &s); | |
873 | if (r < 0) | |
874 | goto fail; | |
875 | ||
876 | finish: | |
877 | *p = t; | |
878 | c->hour = h; | |
879 | c->minute = m; | |
436dd70f HV |
880 | c->microsecond = s; |
881 | ||
36697dc0 LP |
882 | return 0; |
883 | ||
884 | fail: | |
885 | free_chain(h); | |
886 | free_chain(m); | |
887 | free_chain(s); | |
888 | return r; | |
889 | } | |
890 | ||
891 | int calendar_spec_from_string(const char *p, CalendarSpec **spec) { | |
21b3a0fc | 892 | const char *utc; |
36697dc0 LP |
893 | CalendarSpec *c; |
894 | int r; | |
895 | ||
896 | assert(p); | |
897 | assert(spec); | |
898 | ||
36697dc0 LP |
899 | c = new0(CalendarSpec, 1); |
900 | if (!c) | |
901 | return -ENOMEM; | |
21b3a0fc | 902 | c->dst = -1; |
48d26c01 | 903 | c->timezone = NULL; |
36697dc0 | 904 | |
078efddd HV |
905 | utc = endswith_no_case(p, " UTC"); |
906 | if (utc) { | |
907 | c->utc = true; | |
908 | p = strndupa(p, utc - p); | |
21b3a0fc LP |
909 | } else { |
910 | const char *e = NULL; | |
911 | int j; | |
912 | ||
913 | tzset(); | |
914 | ||
915 | /* Check if the local timezone was specified? */ | |
916 | for (j = 0; j <= 1; j++) { | |
917 | if (isempty(tzname[j])) | |
918 | continue; | |
919 | ||
920 | e = endswith_no_case(p, tzname[j]); | |
d80e5b74 | 921 | if (!e) |
21b3a0fc LP |
922 | continue; |
923 | if (e == p) | |
924 | continue; | |
925 | if (e[-1] != ' ') | |
926 | continue; | |
927 | ||
928 | break; | |
929 | } | |
930 | ||
931 | /* Found one of the two timezones specified? */ | |
932 | if (IN_SET(j, 0, 1)) { | |
933 | p = strndupa(p, e - p - 1); | |
934 | c->dst = j; | |
48d26c01 IK |
935 | } else { |
936 | const char *last_space; | |
48d26c01 | 937 | |
a2932a0d ZJS |
938 | last_space = strrchr(p, ' '); |
939 | if (last_space != NULL && timezone_is_valid(last_space + 1)) { | |
940 | c->timezone = strdup(last_space + 1); | |
941 | if (!c->timezone) { | |
942 | r = -ENOMEM; | |
943 | goto fail; | |
48d26c01 | 944 | } |
a2932a0d ZJS |
945 | |
946 | p = strndupa(p, last_space - p); | |
48d26c01 | 947 | } |
21b3a0fc | 948 | } |
078efddd | 949 | } |
51ffa239 | 950 | |
04773cb5 DC |
951 | if (isempty(p)) { |
952 | r = -EINVAL; | |
953 | goto fail; | |
954 | } | |
955 | ||
272ac205 | 956 | if (strcaseeq(p, "minutely")) { |
436dd70f | 957 | r = const_chain(0, &c->microsecond); |
272ac205 DM |
958 | if (r < 0) |
959 | goto fail; | |
960 | ||
961 | } else if (strcaseeq(p, "hourly")) { | |
36697dc0 LP |
962 | r = const_chain(0, &c->minute); |
963 | if (r < 0) | |
964 | goto fail; | |
436dd70f | 965 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
966 | if (r < 0) |
967 | goto fail; | |
968 | ||
b43d1d01 | 969 | } else if (strcaseeq(p, "daily")) { |
36697dc0 LP |
970 | r = const_chain(0, &c->hour); |
971 | if (r < 0) | |
972 | goto fail; | |
973 | r = const_chain(0, &c->minute); | |
974 | if (r < 0) | |
975 | goto fail; | |
436dd70f | 976 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
977 | if (r < 0) |
978 | goto fail; | |
979 | ||
b43d1d01 | 980 | } else if (strcaseeq(p, "monthly")) { |
36697dc0 LP |
981 | r = const_chain(1, &c->day); |
982 | if (r < 0) | |
983 | goto fail; | |
984 | r = const_chain(0, &c->hour); | |
985 | if (r < 0) | |
986 | goto fail; | |
987 | r = const_chain(0, &c->minute); | |
988 | if (r < 0) | |
989 | goto fail; | |
436dd70f | 990 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
991 | if (r < 0) |
992 | goto fail; | |
993 | ||
dbfd41e2 LP |
994 | } else if (strcaseeq(p, "annually") || |
995 | strcaseeq(p, "yearly") || | |
996 | strcaseeq(p, "anually") /* backwards compatibility */ ) { | |
997 | ||
13516818 LP |
998 | r = const_chain(1, &c->month); |
999 | if (r < 0) | |
1000 | goto fail; | |
1001 | r = const_chain(1, &c->day); | |
1002 | if (r < 0) | |
1003 | goto fail; | |
1004 | r = const_chain(0, &c->hour); | |
1005 | if (r < 0) | |
1006 | goto fail; | |
1007 | r = const_chain(0, &c->minute); | |
1008 | if (r < 0) | |
1009 | goto fail; | |
436dd70f | 1010 | r = const_chain(0, &c->microsecond); |
13516818 LP |
1011 | if (r < 0) |
1012 | goto fail; | |
1013 | ||
b43d1d01 | 1014 | } else if (strcaseeq(p, "weekly")) { |
36697dc0 LP |
1015 | |
1016 | c->weekdays_bits = 1; | |
1017 | ||
1018 | r = const_chain(0, &c->hour); | |
1019 | if (r < 0) | |
1020 | goto fail; | |
1021 | r = const_chain(0, &c->minute); | |
1022 | if (r < 0) | |
1023 | goto fail; | |
436dd70f | 1024 | r = const_chain(0, &c->microsecond); |
dbfd41e2 LP |
1025 | if (r < 0) |
1026 | goto fail; | |
1027 | ||
1028 | } else if (strcaseeq(p, "quarterly")) { | |
1029 | ||
1030 | r = const_chain(1, &c->month); | |
1031 | if (r < 0) | |
1032 | goto fail; | |
1033 | r = const_chain(4, &c->month); | |
1034 | if (r < 0) | |
1035 | goto fail; | |
1036 | r = const_chain(7, &c->month); | |
1037 | if (r < 0) | |
1038 | goto fail; | |
1039 | r = const_chain(10, &c->month); | |
1040 | if (r < 0) | |
1041 | goto fail; | |
1042 | r = const_chain(1, &c->day); | |
1043 | if (r < 0) | |
1044 | goto fail; | |
1045 | r = const_chain(0, &c->hour); | |
1046 | if (r < 0) | |
1047 | goto fail; | |
1048 | r = const_chain(0, &c->minute); | |
1049 | if (r < 0) | |
1050 | goto fail; | |
436dd70f | 1051 | r = const_chain(0, &c->microsecond); |
dbfd41e2 LP |
1052 | if (r < 0) |
1053 | goto fail; | |
1054 | ||
1055 | } else if (strcaseeq(p, "biannually") || | |
1056 | strcaseeq(p, "bi-annually") || | |
1057 | strcaseeq(p, "semiannually") || | |
1058 | strcaseeq(p, "semi-annually")) { | |
1059 | ||
1060 | r = const_chain(1, &c->month); | |
1061 | if (r < 0) | |
1062 | goto fail; | |
1063 | r = const_chain(7, &c->month); | |
1064 | if (r < 0) | |
1065 | goto fail; | |
1066 | r = const_chain(1, &c->day); | |
1067 | if (r < 0) | |
1068 | goto fail; | |
1069 | r = const_chain(0, &c->hour); | |
1070 | if (r < 0) | |
1071 | goto fail; | |
1072 | r = const_chain(0, &c->minute); | |
1073 | if (r < 0) | |
1074 | goto fail; | |
436dd70f | 1075 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
1076 | if (r < 0) |
1077 | goto fail; | |
1078 | ||
1079 | } else { | |
1080 | r = parse_weekdays(&p, c); | |
1081 | if (r < 0) | |
1082 | goto fail; | |
1083 | ||
1084 | r = parse_date(&p, c); | |
1085 | if (r < 0) | |
1086 | goto fail; | |
1087 | ||
d80e5b74 ZJS |
1088 | if (r == 0) { |
1089 | r = parse_calendar_time(&p, c); | |
1090 | if (r < 0) | |
1091 | goto fail; | |
1092 | } | |
36697dc0 LP |
1093 | |
1094 | if (*p != 0) { | |
1095 | r = -EINVAL; | |
1096 | goto fail; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | r = calendar_spec_normalize(c); | |
1101 | if (r < 0) | |
1102 | goto fail; | |
1103 | ||
1104 | if (!calendar_spec_valid(c)) { | |
1105 | r = -EINVAL; | |
1106 | goto fail; | |
1107 | } | |
1108 | ||
1109 | *spec = c; | |
1110 | return 0; | |
1111 | ||
1112 | fail: | |
1113 | calendar_spec_free(c); | |
1114 | return r; | |
1115 | } | |
1116 | ||
60bf5836 | 1117 | static int find_end_of_month(struct tm *tm, bool utc, int day) { |
a2eb5ea7 DC |
1118 | struct tm t = *tm; |
1119 | ||
1120 | t.tm_mon++; | |
1121 | t.tm_mday = 1 - day; | |
1122 | ||
c477ff14 | 1123 | if (mktime_or_timegm(&t, utc) < 0 || |
a2eb5ea7 DC |
1124 | t.tm_mon != tm->tm_mon) |
1125 | return -1; | |
1126 | ||
1127 | return t.tm_mday; | |
1128 | } | |
1129 | ||
8ea80351 DC |
1130 | static int find_matching_component(const CalendarSpec *spec, const CalendarComponent *c, |
1131 | struct tm *tm, int *val) { | |
482f3b54 | 1132 | const CalendarComponent *p = c; |
e78fce48 | 1133 | int start, stop, d = -1; |
36697dc0 LP |
1134 | bool d_set = false; |
1135 | int r; | |
1136 | ||
1137 | assert(val); | |
1138 | ||
1139 | if (!c) | |
1140 | return 0; | |
1141 | ||
1142 | while (c) { | |
e78fce48 DC |
1143 | start = c->start; |
1144 | stop = c->stop; | |
a2eb5ea7 | 1145 | |
8ea80351 | 1146 | if (spec->end_of_month && p == spec->day) { |
e78fce48 DC |
1147 | start = find_end_of_month(tm, spec->utc, start); |
1148 | stop = find_end_of_month(tm, spec->utc, stop); | |
a2eb5ea7 | 1149 | |
e78fce48 DC |
1150 | if (stop > 0) |
1151 | SWAP_TWO(start, stop); | |
a2eb5ea7 | 1152 | } |
8ea80351 | 1153 | |
e78fce48 | 1154 | if (start >= *val) { |
36697dc0 | 1155 | |
e78fce48 DC |
1156 | if (!d_set || start < d) { |
1157 | d = start; | |
36697dc0 LP |
1158 | d_set = true; |
1159 | } | |
1160 | ||
1161 | } else if (c->repeat > 0) { | |
1162 | int k; | |
1163 | ||
e78fce48 | 1164 | k = start + c->repeat * ((*val - start + c->repeat - 1) / c->repeat); |
36697dc0 | 1165 | |
e78fce48 | 1166 | if ((!d_set || k < d) && (stop < 0 || k <= stop)) { |
36697dc0 LP |
1167 | d = k; |
1168 | d_set = true; | |
1169 | } | |
1170 | } | |
1171 | ||
482f3b54 | 1172 | c = c->next; |
36697dc0 LP |
1173 | } |
1174 | ||
1175 | if (!d_set) | |
1176 | return -ENOENT; | |
1177 | ||
1178 | r = *val != d; | |
1179 | *val = d; | |
1180 | return r; | |
1181 | } | |
1182 | ||
51ffa239 | 1183 | static bool tm_out_of_bounds(const struct tm *tm, bool utc) { |
36697dc0 LP |
1184 | struct tm t; |
1185 | assert(tm); | |
1186 | ||
1187 | t = *tm; | |
1188 | ||
c477ff14 | 1189 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1190 | return true; |
1191 | ||
f6e7d66b DC |
1192 | /* |
1193 | * Set an upper bound on the year so impossible dates like "*-02-31" | |
1194 | * don't cause find_next() to loop forever. tm_year contains years | |
1195 | * since 1900, so adjust it accordingly. | |
1196 | */ | |
1197 | if (tm->tm_year + 1900 > MAX_YEAR) | |
1198 | return true; | |
1199 | ||
36697dc0 LP |
1200 | /* Did any normalization take place? If so, it was out of bounds before */ |
1201 | return | |
1202 | t.tm_year != tm->tm_year || | |
1203 | t.tm_mon != tm->tm_mon || | |
1204 | t.tm_mday != tm->tm_mday || | |
1205 | t.tm_hour != tm->tm_hour || | |
1206 | t.tm_min != tm->tm_min || | |
1207 | t.tm_sec != tm->tm_sec; | |
1208 | } | |
1209 | ||
51ffa239 | 1210 | static bool matches_weekday(int weekdays_bits, const struct tm *tm, bool utc) { |
36697dc0 LP |
1211 | struct tm t; |
1212 | int k; | |
1213 | ||
489464d0 | 1214 | if (weekdays_bits < 0 || weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
1215 | return true; |
1216 | ||
1217 | t = *tm; | |
c477ff14 | 1218 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1219 | return false; |
1220 | ||
1221 | k = t.tm_wday == 0 ? 6 : t.tm_wday - 1; | |
1222 | return (weekdays_bits & (1 << k)); | |
1223 | } | |
1224 | ||
436dd70f | 1225 | static int find_next(const CalendarSpec *spec, struct tm *tm, usec_t *usec) { |
36697dc0 | 1226 | struct tm c; |
436dd70f | 1227 | int tm_usec; |
36697dc0 LP |
1228 | int r; |
1229 | ||
1230 | assert(spec); | |
1231 | assert(tm); | |
1232 | ||
1233 | c = *tm; | |
436dd70f | 1234 | tm_usec = *usec; |
36697dc0 LP |
1235 | |
1236 | for (;;) { | |
1237 | /* Normalize the current date */ | |
ea3894c1 | 1238 | (void) mktime_or_timegm(&c, spec->utc); |
21b3a0fc | 1239 | c.tm_isdst = spec->dst; |
36697dc0 LP |
1240 | |
1241 | c.tm_year += 1900; | |
8ea80351 | 1242 | r = find_matching_component(spec, spec->year, &c, &c.tm_year); |
36697dc0 LP |
1243 | c.tm_year -= 1900; |
1244 | ||
1245 | if (r > 0) { | |
1246 | c.tm_mon = 0; | |
1247 | c.tm_mday = 1; | |
436dd70f | 1248 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1249 | } |
e308ddca | 1250 | if (r < 0) |
36697dc0 | 1251 | return r; |
e308ddca LP |
1252 | if (tm_out_of_bounds(&c, spec->utc)) |
1253 | return -ENOENT; | |
36697dc0 LP |
1254 | |
1255 | c.tm_mon += 1; | |
8ea80351 | 1256 | r = find_matching_component(spec, spec->month, &c, &c.tm_mon); |
36697dc0 LP |
1257 | c.tm_mon -= 1; |
1258 | ||
1259 | if (r > 0) { | |
1260 | c.tm_mday = 1; | |
436dd70f | 1261 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1262 | } |
51ffa239 | 1263 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1264 | c.tm_year++; |
36697dc0 LP |
1265 | c.tm_mon = 0; |
1266 | c.tm_mday = 1; | |
436dd70f | 1267 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1268 | continue; |
1269 | } | |
1270 | ||
8ea80351 | 1271 | r = find_matching_component(spec, spec->day, &c, &c.tm_mday); |
36697dc0 | 1272 | if (r > 0) |
436dd70f | 1273 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
51ffa239 | 1274 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1275 | c.tm_mon++; |
36697dc0 | 1276 | c.tm_mday = 1; |
436dd70f | 1277 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1278 | continue; |
1279 | } | |
1280 | ||
51ffa239 | 1281 | if (!matches_weekday(spec->weekdays_bits, &c, spec->utc)) { |
36697dc0 | 1282 | c.tm_mday++; |
436dd70f | 1283 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1284 | continue; |
1285 | } | |
1286 | ||
8ea80351 | 1287 | r = find_matching_component(spec, spec->hour, &c, &c.tm_hour); |
36697dc0 | 1288 | if (r > 0) |
a022d76e | 1289 | c.tm_min = c.tm_sec = tm_usec = 0; |
51ffa239 | 1290 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1291 | c.tm_mday++; |
436dd70f | 1292 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1293 | continue; |
1294 | } | |
1295 | ||
8ea80351 | 1296 | r = find_matching_component(spec, spec->minute, &c, &c.tm_min); |
36697dc0 | 1297 | if (r > 0) |
a022d76e | 1298 | c.tm_sec = tm_usec = 0; |
51ffa239 | 1299 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1300 | c.tm_hour++; |
436dd70f | 1301 | c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1302 | continue; |
1303 | } | |
1304 | ||
436dd70f | 1305 | c.tm_sec = c.tm_sec * USEC_PER_SEC + tm_usec; |
8ea80351 | 1306 | r = find_matching_component(spec, spec->microsecond, &c, &c.tm_sec); |
436dd70f HV |
1307 | tm_usec = c.tm_sec % USEC_PER_SEC; |
1308 | c.tm_sec /= USEC_PER_SEC; | |
1309 | ||
51ffa239 | 1310 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1311 | c.tm_min++; |
436dd70f | 1312 | c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1313 | continue; |
1314 | } | |
1315 | ||
36697dc0 | 1316 | *tm = c; |
436dd70f | 1317 | *usec = tm_usec; |
36697dc0 LP |
1318 | return 0; |
1319 | } | |
1320 | } | |
1321 | ||
48d26c01 | 1322 | static int calendar_spec_next_usec_impl(const CalendarSpec *spec, usec_t usec, usec_t *next) { |
36697dc0 LP |
1323 | struct tm tm; |
1324 | time_t t; | |
1325 | int r; | |
436dd70f | 1326 | usec_t tm_usec; |
36697dc0 LP |
1327 | |
1328 | assert(spec); | |
1329 | assert(next); | |
1330 | ||
1bb4b028 LP |
1331 | if (usec > USEC_TIMESTAMP_FORMATTABLE_MAX) |
1332 | return -EINVAL; | |
1333 | ||
436dd70f HV |
1334 | usec++; |
1335 | t = (time_t) (usec / USEC_PER_SEC); | |
51ffa239 | 1336 | assert_se(localtime_or_gmtime_r(&t, &tm, spec->utc)); |
436dd70f | 1337 | tm_usec = usec % USEC_PER_SEC; |
36697dc0 | 1338 | |
436dd70f | 1339 | r = find_next(spec, &tm, &tm_usec); |
36697dc0 LP |
1340 | if (r < 0) |
1341 | return r; | |
1342 | ||
51ffa239 | 1343 | t = mktime_or_timegm(&tm, spec->utc); |
c477ff14 | 1344 | if (t < 0) |
36697dc0 LP |
1345 | return -EINVAL; |
1346 | ||
436dd70f | 1347 | *next = (usec_t) t * USEC_PER_SEC + tm_usec; |
36697dc0 LP |
1348 | return 0; |
1349 | } | |
48d26c01 IK |
1350 | |
1351 | typedef struct SpecNextResult { | |
1352 | usec_t next; | |
1353 | int return_value; | |
1354 | } SpecNextResult; | |
1355 | ||
1356 | int calendar_spec_next_usec(const CalendarSpec *spec, usec_t usec, usec_t *next) { | |
4c253ed1 | 1357 | SpecNextResult *shared, tmp; |
48d26c01 IK |
1358 | int r; |
1359 | ||
1360 | if (isempty(spec->timezone)) | |
1361 | return calendar_spec_next_usec_impl(spec, usec, next); | |
1362 | ||
1363 | shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0); | |
1364 | if (shared == MAP_FAILED) | |
1365 | return negative_errno(); | |
1366 | ||
1f5d1e02 | 1367 | r = safe_fork("(sd-calendar)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT, NULL); |
4c253ed1 | 1368 | if (r < 0) { |
48d26c01 | 1369 | (void) munmap(shared, sizeof *shared); |
4c253ed1 | 1370 | return r; |
48d26c01 | 1371 | } |
4c253ed1 | 1372 | if (r == 0) { |
48d26c01 IK |
1373 | if (setenv("TZ", spec->timezone, 1) != 0) { |
1374 | shared->return_value = negative_errno(); | |
1375 | _exit(EXIT_FAILURE); | |
1376 | } | |
1377 | ||
1378 | tzset(); | |
1379 | ||
1380 | shared->return_value = calendar_spec_next_usec_impl(spec, usec, &shared->next); | |
1381 | ||
1382 | _exit(EXIT_SUCCESS); | |
1383 | } | |
1384 | ||
48d26c01 | 1385 | tmp = *shared; |
1f5d1e02 | 1386 | if (munmap(shared, sizeof *shared) < 0) |
48d26c01 IK |
1387 | return negative_errno(); |
1388 | ||
1389 | if (tmp.return_value == 0) | |
1390 | *next = tmp.next; | |
1391 | ||
1392 | return tmp.return_value; | |
1393 | } |