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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
36697dc0 | 2 | |
11c3a366 | 3 | #include <alloca.h> |
9dfa81a0 | 4 | #include <ctype.h> |
11c3a366 | 5 | #include <errno.h> |
c0aebb4b | 6 | #include <limits.h> |
11c3a366 TA |
7 | #include <stddef.h> |
8 | #include <stdio.h> | |
0d536673 | 9 | #include <stdio_ext.h> |
36697dc0 LP |
10 | #include <stdlib.h> |
11 | #include <string.h> | |
48d26c01 | 12 | #include <sys/mman.h> |
11c3a366 | 13 | #include <time.h> |
36697dc0 | 14 | |
b5efdb8a | 15 | #include "alloc-util.h" |
36697dc0 | 16 | #include "calendarspec.h" |
0d39fa9c | 17 | #include "fileio.h" |
11c3a366 | 18 | #include "macro.h" |
93cc7779 | 19 | #include "parse-util.h" |
dccca82b | 20 | #include "process-util.h" |
cf0fbc49 | 21 | #include "string-util.h" |
48d26c01 | 22 | #include "time-util.h" |
36697dc0 | 23 | |
a2eb5ea7 DC |
24 | #define BITS_WEEKDAYS 127 |
25 | #define MIN_YEAR 1970 | |
26 | #define MAX_YEAR 2199 | |
489464d0 | 27 | |
74353158 ZJS |
28 | /* An arbitrary limit on the length of the chains of components. We don't want to |
29 | * build a very long linked list, which would be slow to iterate over and might cause | |
30 | * our stack to overflow. It's unlikely that legitimate uses require more than a few | |
31 | * linked compenents anyway. */ | |
32 | #define CALENDARSPEC_COMPONENTS_MAX 240 | |
33 | ||
36697dc0 LP |
34 | static void free_chain(CalendarComponent *c) { |
35 | CalendarComponent *n; | |
36 | ||
37 | while (c) { | |
38 | n = c->next; | |
39 | free(c); | |
40 | c = n; | |
41 | } | |
42 | } | |
43 | ||
7c123d49 | 44 | CalendarSpec* calendar_spec_free(CalendarSpec *c) { |
0b76b4d8 LP |
45 | |
46 | if (!c) | |
7c123d49 | 47 | return NULL; |
36697dc0 LP |
48 | |
49 | free_chain(c->year); | |
50 | free_chain(c->month); | |
51 | free_chain(c->day); | |
52 | free_chain(c->hour); | |
53 | free_chain(c->minute); | |
436dd70f | 54 | free_chain(c->microsecond); |
48d26c01 | 55 | free(c->timezone); |
36697dc0 | 56 | |
7c123d49 | 57 | return mfree(c); |
36697dc0 LP |
58 | } |
59 | ||
60 | static int component_compare(const void *_a, const void *_b) { | |
61 | CalendarComponent * const *a = _a, * const *b = _b; | |
62 | ||
e78fce48 | 63 | if ((*a)->start < (*b)->start) |
36697dc0 | 64 | return -1; |
e78fce48 | 65 | if ((*a)->start > (*b)->start) |
36697dc0 LP |
66 | return 1; |
67 | ||
e78fce48 | 68 | if ((*a)->stop < (*b)->stop) |
a2eb5ea7 | 69 | return -1; |
e78fce48 | 70 | if ((*a)->stop > (*b)->stop) |
a2eb5ea7 DC |
71 | return 1; |
72 | ||
36697dc0 LP |
73 | if ((*a)->repeat < (*b)->repeat) |
74 | return -1; | |
75 | if ((*a)->repeat > (*b)->repeat) | |
76 | return 1; | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
a2eb5ea7 | 81 | static void normalize_chain(CalendarComponent **c) { |
36697dc0 | 82 | CalendarComponent **b, *i, **j, *next; |
da6053d0 | 83 | size_t n = 0, k; |
36697dc0 LP |
84 | |
85 | assert(c); | |
86 | ||
a2eb5ea7 | 87 | for (i = *c; i; i = i->next) { |
36697dc0 LP |
88 | n++; |
89 | ||
a2eb5ea7 | 90 | /* |
e78fce48 | 91 | * While we're counting the chain, also normalize `stop` |
a2eb5ea7 DC |
92 | * so the length of the range is a multiple of `repeat` |
93 | */ | |
c0aebb4b | 94 | if (i->stop > i->start && i->repeat > 0) |
e78fce48 | 95 | i->stop -= (i->stop - i->start) % i->repeat; |
a2eb5ea7 DC |
96 | |
97 | } | |
98 | ||
36697dc0 LP |
99 | if (n <= 1) |
100 | return; | |
101 | ||
cf409d15 | 102 | j = b = newa(CalendarComponent*, n); |
36697dc0 LP |
103 | for (i = *c; i; i = i->next) |
104 | *(j++) = i; | |
105 | ||
106 | qsort(b, n, sizeof(CalendarComponent*), component_compare); | |
107 | ||
108 | b[n-1]->next = NULL; | |
109 | next = b[n-1]; | |
110 | ||
111 | /* Drop non-unique entries */ | |
112 | for (k = n-1; k > 0; k--) { | |
963e3d83 | 113 | if (component_compare(&b[k-1], &next) == 0) { |
36697dc0 LP |
114 | free(b[k-1]); |
115 | continue; | |
116 | } | |
117 | ||
118 | b[k-1]->next = next; | |
119 | next = b[k-1]; | |
120 | } | |
121 | ||
122 | *c = next; | |
123 | } | |
124 | ||
125 | static void fix_year(CalendarComponent *c) { | |
126 | /* Turns 12 → 2012, 89 → 1989 */ | |
127 | ||
9ed794a3 | 128 | while (c) { |
e78fce48 DC |
129 | if (c->start >= 0 && c->start < 70) |
130 | c->start += 2000; | |
36697dc0 | 131 | |
e78fce48 DC |
132 | if (c->stop >= 0 && c->stop < 70) |
133 | c->stop += 2000; | |
a2eb5ea7 | 134 | |
e78fce48 DC |
135 | if (c->start >= 70 && c->start < 100) |
136 | c->start += 1900; | |
36697dc0 | 137 | |
e78fce48 DC |
138 | if (c->stop >= 70 && c->stop < 100) |
139 | c->stop += 1900; | |
a2eb5ea7 | 140 | |
482f3b54 | 141 | c = c->next; |
36697dc0 LP |
142 | } |
143 | } | |
144 | ||
145 | int calendar_spec_normalize(CalendarSpec *c) { | |
146 | assert(c); | |
147 | ||
10e859a2 LP |
148 | if (streq_ptr(c->timezone, "UTC")) { |
149 | c->utc = true; | |
150 | c->timezone = mfree(c->timezone); | |
151 | } | |
152 | ||
489464d0 | 153 | if (c->weekdays_bits <= 0 || c->weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
154 | c->weekdays_bits = -1; |
155 | ||
8ea80351 DC |
156 | if (c->end_of_month && !c->day) |
157 | c->end_of_month = false; | |
158 | ||
36697dc0 LP |
159 | fix_year(c->year); |
160 | ||
a2eb5ea7 DC |
161 | normalize_chain(&c->year); |
162 | normalize_chain(&c->month); | |
163 | normalize_chain(&c->day); | |
164 | normalize_chain(&c->hour); | |
165 | normalize_chain(&c->minute); | |
166 | normalize_chain(&c->microsecond); | |
36697dc0 LP |
167 | |
168 | return 0; | |
169 | } | |
170 | ||
c58b1b3a | 171 | _pure_ static bool chain_valid(CalendarComponent *c, int from, int to, bool end_of_month) { |
e127f26b ZJS |
172 | assert(to >= from); |
173 | ||
36697dc0 LP |
174 | if (!c) |
175 | return true; | |
176 | ||
a2eb5ea7 DC |
177 | /* Forbid dates more than 28 days from the end of the month */ |
178 | if (end_of_month) | |
179 | to -= 3; | |
180 | ||
e78fce48 | 181 | if (c->start < from || c->start > to) |
36697dc0 LP |
182 | return false; |
183 | ||
e127f26b ZJS |
184 | /* Avoid overly large values that could cause overflow */ |
185 | if (c->repeat > to - from) | |
186 | return false; | |
187 | ||
8ea80351 DC |
188 | /* |
189 | * c->repeat must be short enough so at least one repetition may | |
190 | * occur before the end of the interval. For dates scheduled | |
e78fce48 | 191 | * relative to the end of the month, c->start and c->stop |
a2eb5ea7 | 192 | * correspond to the Nth last day of the month. |
8ea80351 | 193 | */ |
e78fce48 DC |
194 | if (c->stop >= 0) { |
195 | if (c->stop < from || c ->stop > to) | |
a2eb5ea7 | 196 | return false; |
8ea80351 | 197 | |
e78fce48 | 198 | if (c->start + c->repeat > c->stop) |
a2eb5ea7 DC |
199 | return false; |
200 | } else { | |
e78fce48 | 201 | if (end_of_month && c->start - c->repeat < from) |
a2eb5ea7 DC |
202 | return false; |
203 | ||
e78fce48 | 204 | if (!end_of_month && c->start + c->repeat > to) |
a2eb5ea7 DC |
205 | return false; |
206 | } | |
36697dc0 LP |
207 | |
208 | if (c->next) | |
c58b1b3a | 209 | return chain_valid(c->next, from, to, end_of_month); |
36697dc0 LP |
210 | |
211 | return true; | |
212 | } | |
213 | ||
44a6b1b6 | 214 | _pure_ bool calendar_spec_valid(CalendarSpec *c) { |
36697dc0 LP |
215 | assert(c); |
216 | ||
489464d0 | 217 | if (c->weekdays_bits > BITS_WEEKDAYS) |
36697dc0 LP |
218 | return false; |
219 | ||
8ea80351 | 220 | if (!chain_valid(c->year, MIN_YEAR, MAX_YEAR, false)) |
36697dc0 LP |
221 | return false; |
222 | ||
8ea80351 | 223 | if (!chain_valid(c->month, 1, 12, false)) |
36697dc0 LP |
224 | return false; |
225 | ||
8ea80351 | 226 | if (!chain_valid(c->day, 1, 31, c->end_of_month)) |
36697dc0 LP |
227 | return false; |
228 | ||
8ea80351 | 229 | if (!chain_valid(c->hour, 0, 23, false)) |
36697dc0 LP |
230 | return false; |
231 | ||
8ea80351 | 232 | if (!chain_valid(c->minute, 0, 59, false)) |
36697dc0 LP |
233 | return false; |
234 | ||
8ea80351 | 235 | if (!chain_valid(c->microsecond, 0, 60*USEC_PER_SEC-1, false)) |
36697dc0 LP |
236 | return false; |
237 | ||
238 | return true; | |
239 | } | |
240 | ||
241 | static void format_weekdays(FILE *f, const CalendarSpec *c) { | |
242 | static const char *const days[] = { | |
243 | "Mon", | |
244 | "Tue", | |
245 | "Wed", | |
246 | "Thu", | |
247 | "Fri", | |
248 | "Sat", | |
249 | "Sun" | |
250 | }; | |
251 | ||
252 | int l, x; | |
e638d050 | 253 | bool need_comma = false; |
36697dc0 LP |
254 | |
255 | assert(f); | |
256 | assert(c); | |
489464d0 | 257 | assert(c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS); |
36697dc0 LP |
258 | |
259 | for (x = 0, l = -1; x < (int) ELEMENTSOF(days); x++) { | |
260 | ||
261 | if (c->weekdays_bits & (1 << x)) { | |
262 | ||
263 | if (l < 0) { | |
e638d050 | 264 | if (need_comma) |
0d536673 | 265 | fputc(',', f); |
36697dc0 | 266 | else |
e638d050 | 267 | need_comma = true; |
36697dc0 | 268 | |
0d536673 | 269 | fputs(days[x], f); |
36697dc0 LP |
270 | l = x; |
271 | } | |
272 | ||
273 | } else if (l >= 0) { | |
274 | ||
275 | if (x > l + 1) { | |
0d536673 LP |
276 | fputs(x > l + 2 ? ".." : ",", f); |
277 | fputs(days[x-1], f); | |
36697dc0 LP |
278 | } |
279 | ||
280 | l = -1; | |
281 | } | |
282 | } | |
283 | ||
284 | if (l >= 0 && x > l + 1) { | |
0d536673 LP |
285 | fputs(x > l + 2 ? ".." : ",", f); |
286 | fputs(days[x-1], f); | |
36697dc0 LP |
287 | } |
288 | } | |
289 | ||
436dd70f | 290 | static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) { |
7c250321 | 291 | int d = usec ? (int) USEC_PER_SEC : 1; |
9904dc00 | 292 | |
36697dc0 LP |
293 | assert(f); |
294 | ||
295 | if (!c) { | |
0d536673 | 296 | fputc('*', f); |
36697dc0 LP |
297 | return; |
298 | } | |
299 | ||
482f3b54 | 300 | if (usec && c->start == 0 && c->repeat == USEC_PER_SEC && !c->next) { |
0d536673 | 301 | fputc('*', f); |
482f3b54 DC |
302 | return; |
303 | } | |
304 | ||
e78fce48 | 305 | assert(c->start >= 0); |
7c250321 | 306 | |
e78fce48 DC |
307 | fprintf(f, "%0*i", space, c->start / d); |
308 | if (c->start % d > 0) | |
309 | fprintf(f, ".%06i", c->start % d); | |
7c250321 | 310 | |
e78fce48 DC |
311 | if (c->stop > 0) |
312 | fprintf(f, "..%0*i", space, c->stop / d); | |
313 | if (c->stop % d > 0) | |
314 | fprintf(f, ".%06i", c->stop % d); | |
a2eb5ea7 | 315 | |
e78fce48 | 316 | if (c->repeat > 0 && !(c->stop > 0 && c->repeat == d)) |
7c250321 | 317 | fprintf(f, "/%i", c->repeat / d); |
a2eb5ea7 | 318 | if (c->repeat % d > 0) |
7c250321 | 319 | fprintf(f, ".%06i", c->repeat % d); |
36697dc0 | 320 | |
a2eb5ea7 | 321 | if (c->next) { |
0d536673 | 322 | fputc(',', f); |
436dd70f | 323 | format_chain(f, space, c->next, usec); |
36697dc0 LP |
324 | } |
325 | } | |
326 | ||
327 | int calendar_spec_to_string(const CalendarSpec *c, char **p) { | |
328 | char *buf = NULL; | |
329 | size_t sz = 0; | |
330 | FILE *f; | |
dacd6cee | 331 | int r; |
36697dc0 LP |
332 | |
333 | assert(c); | |
334 | assert(p); | |
335 | ||
336 | f = open_memstream(&buf, &sz); | |
337 | if (!f) | |
338 | return -ENOMEM; | |
339 | ||
0d536673 LP |
340 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
341 | ||
489464d0 | 342 | if (c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS) { |
36697dc0 | 343 | format_weekdays(f, c); |
0d536673 | 344 | fputc(' ', f); |
36697dc0 LP |
345 | } |
346 | ||
436dd70f | 347 | format_chain(f, 4, c->year, false); |
0d536673 | 348 | fputc('-', f); |
436dd70f | 349 | format_chain(f, 2, c->month, false); |
0d536673 | 350 | fputc(c->end_of_month ? '~' : '-', f); |
436dd70f | 351 | format_chain(f, 2, c->day, false); |
0d536673 | 352 | fputc(' ', f); |
436dd70f | 353 | format_chain(f, 2, c->hour, false); |
0d536673 | 354 | fputc(':', f); |
436dd70f | 355 | format_chain(f, 2, c->minute, false); |
0d536673 | 356 | fputc(':', f); |
482f3b54 | 357 | format_chain(f, 2, c->microsecond, true); |
36697dc0 | 358 | |
51ffa239 | 359 | if (c->utc) |
0d536673 | 360 | fputs(" UTC", f); |
48d26c01 | 361 | else if (c->timezone != NULL) { |
0d536673 LP |
362 | fputc(' ', f); |
363 | fputs(c->timezone, f); | |
48d26c01 | 364 | } else if (IN_SET(c->dst, 0, 1)) { |
21b3a0fc LP |
365 | |
366 | /* If daylight saving is explicitly on or off, let's show the used timezone. */ | |
367 | ||
368 | tzset(); | |
369 | ||
370 | if (!isempty(tzname[c->dst])) { | |
0d536673 LP |
371 | fputc(' ', f); |
372 | fputs(tzname[c->dst], f); | |
21b3a0fc LP |
373 | } |
374 | } | |
51ffa239 | 375 | |
dacd6cee LP |
376 | r = fflush_and_check(f); |
377 | if (r < 0) { | |
36697dc0 LP |
378 | free(buf); |
379 | fclose(f); | |
dacd6cee | 380 | return r; |
36697dc0 LP |
381 | } |
382 | ||
383 | fclose(f); | |
384 | ||
385 | *p = buf; | |
386 | return 0; | |
387 | } | |
388 | ||
389 | static int parse_weekdays(const char **p, CalendarSpec *c) { | |
390 | static const struct { | |
391 | const char *name; | |
392 | const int nr; | |
393 | } day_nr[] = { | |
394 | { "Monday", 0 }, | |
395 | { "Mon", 0 }, | |
396 | { "Tuesday", 1 }, | |
397 | { "Tue", 1 }, | |
398 | { "Wednesday", 2 }, | |
399 | { "Wed", 2 }, | |
400 | { "Thursday", 3 }, | |
401 | { "Thu", 3 }, | |
402 | { "Friday", 4 }, | |
403 | { "Fri", 4 }, | |
404 | { "Saturday", 5 }, | |
405 | { "Sat", 5 }, | |
406 | { "Sunday", 6 }, | |
407 | { "Sun", 6 } | |
408 | }; | |
409 | ||
410 | int l = -1; | |
411 | bool first = true; | |
412 | ||
413 | assert(p); | |
414 | assert(*p); | |
415 | assert(c); | |
416 | ||
417 | for (;;) { | |
da6053d0 | 418 | size_t i; |
36697dc0 | 419 | |
36697dc0 LP |
420 | for (i = 0; i < ELEMENTSOF(day_nr); i++) { |
421 | size_t skip; | |
422 | ||
423 | if (!startswith_no_case(*p, day_nr[i].name)) | |
424 | continue; | |
425 | ||
426 | skip = strlen(day_nr[i].name); | |
427 | ||
4c701096 | 428 | if (!IN_SET((*p)[skip], 0, '-', '.', ',', ' ')) |
36697dc0 LP |
429 | return -EINVAL; |
430 | ||
431 | c->weekdays_bits |= 1 << day_nr[i].nr; | |
432 | ||
433 | if (l >= 0) { | |
434 | int j; | |
435 | ||
436 | if (l > day_nr[i].nr) | |
437 | return -EINVAL; | |
438 | ||
439 | for (j = l + 1; j < day_nr[i].nr; j++) | |
440 | c->weekdays_bits |= 1 << j; | |
441 | } | |
442 | ||
443 | *p += skip; | |
444 | break; | |
445 | } | |
446 | ||
447 | /* Couldn't find this prefix, so let's assume the | |
448 | weekday was not specified and let's continue with | |
449 | the date */ | |
450 | if (i >= ELEMENTSOF(day_nr)) | |
451 | return first ? 0 : -EINVAL; | |
452 | ||
453 | /* We reached the end of the string */ | |
454 | if (**p == 0) | |
455 | return 0; | |
456 | ||
457 | /* We reached the end of the weekday spec part */ | |
458 | if (**p == ' ') { | |
459 | *p += strspn(*p, " "); | |
460 | return 0; | |
461 | } | |
462 | ||
e638d050 DC |
463 | if (**p == '.') { |
464 | if (l >= 0) | |
465 | return -EINVAL; | |
466 | ||
467 | if ((*p)[1] != '.') | |
468 | return -EINVAL; | |
469 | ||
470 | l = day_nr[i].nr; | |
6bae2fd4 | 471 | *p += 2; |
e638d050 DC |
472 | |
473 | /* Support ranges with "-" for backwards compatibility */ | |
474 | } else if (**p == '-') { | |
36697dc0 LP |
475 | if (l >= 0) |
476 | return -EINVAL; | |
477 | ||
478 | l = day_nr[i].nr; | |
6bae2fd4 DC |
479 | *p += 1; |
480 | ||
481 | } else if (**p == ',') { | |
36697dc0 | 482 | l = -1; |
6bae2fd4 DC |
483 | *p += 1; |
484 | } | |
485 | ||
482f3b54 | 486 | /* Allow a trailing comma but not an open range */ |
4c701096 | 487 | if (IN_SET(**p, 0, ' ')) { |
6bae2fd4 DC |
488 | *p += strspn(*p, " "); |
489 | return l < 0 ? 0 : -EINVAL; | |
490 | } | |
36697dc0 | 491 | |
36697dc0 LP |
492 | first = false; |
493 | } | |
494 | } | |
495 | ||
d80e5b74 ZJS |
496 | static int parse_one_number(const char *p, const char **e, unsigned long *ret) { |
497 | char *ee = NULL; | |
498 | unsigned long value; | |
499 | ||
500 | errno = 0; | |
501 | value = strtoul(p, &ee, 10); | |
502 | if (errno > 0) | |
503 | return -errno; | |
504 | if (ee == p) | |
505 | return -EINVAL; | |
506 | ||
507 | *ret = value; | |
508 | *e = ee; | |
509 | return 0; | |
510 | } | |
511 | ||
c0aebb4b | 512 | static int parse_component_decimal(const char **p, bool usec, int *res) { |
436dd70f HV |
513 | unsigned long value; |
514 | const char *e = NULL; | |
436dd70f | 515 | int r; |
36697dc0 | 516 | |
9dfa81a0 DC |
517 | if (!isdigit(**p)) |
518 | return -EINVAL; | |
519 | ||
d80e5b74 ZJS |
520 | r = parse_one_number(*p, &e, &value); |
521 | if (r < 0) | |
522 | return r; | |
36697dc0 | 523 | |
436dd70f HV |
524 | if (usec) { |
525 | if (value * USEC_PER_SEC / USEC_PER_SEC != value) | |
36697dc0 LP |
526 | return -ERANGE; |
527 | ||
436dd70f | 528 | value *= USEC_PER_SEC; |
436dd70f | 529 | |
60bf5836 DC |
530 | /* One "." is a decimal point, but ".." is a range separator */ |
531 | if (e[0] == '.' && e[1] != '.') { | |
532 | unsigned add; | |
36ff0c97 | 533 | |
436dd70f HV |
534 | e++; |
535 | r = parse_fractional_part_u(&e, 6, &add); | |
536 | if (r < 0) | |
537 | return r; | |
538 | ||
539 | if (add + value < value) | |
540 | return -ERANGE; | |
541 | value += add; | |
542 | } | |
543 | } | |
544 | ||
c0aebb4b DC |
545 | if (value > INT_MAX) |
546 | return -ERANGE; | |
547 | ||
436dd70f HV |
548 | *p = e; |
549 | *res = value; | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
32b52369 DC |
554 | static int const_chain(int value, CalendarComponent **c) { |
555 | CalendarComponent *cc = NULL; | |
556 | ||
557 | assert(c); | |
558 | ||
559 | cc = new0(CalendarComponent, 1); | |
560 | if (!cc) | |
561 | return -ENOMEM; | |
562 | ||
e78fce48 DC |
563 | cc->start = value; |
564 | cc->stop = -1; | |
32b52369 DC |
565 | cc->repeat = 0; |
566 | cc->next = *c; | |
567 | ||
568 | *c = cc; | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
d80e5b74 ZJS |
573 | static int calendarspec_from_time_t(CalendarSpec *c, time_t time) { |
574 | struct tm tm; | |
575 | CalendarComponent *year = NULL, *month = NULL, *day = NULL, *hour = NULL, *minute = NULL, *us = NULL; | |
576 | int r; | |
577 | ||
55a30fd4 ZJS |
578 | if (!gmtime_r(&time, &tm)) |
579 | return -ERANGE; | |
d80e5b74 ZJS |
580 | |
581 | r = const_chain(tm.tm_year + 1900, &year); | |
582 | if (r < 0) | |
583 | return r; | |
584 | ||
585 | r = const_chain(tm.tm_mon + 1, &month); | |
586 | if (r < 0) | |
587 | return r; | |
588 | ||
589 | r = const_chain(tm.tm_mday, &day); | |
590 | if (r < 0) | |
591 | return r; | |
592 | ||
593 | r = const_chain(tm.tm_hour, &hour); | |
594 | if (r < 0) | |
595 | return r; | |
596 | ||
597 | r = const_chain(tm.tm_min, &minute); | |
598 | if (r < 0) | |
599 | return r; | |
600 | ||
601 | r = const_chain(tm.tm_sec * USEC_PER_SEC, &us); | |
602 | if (r < 0) | |
603 | return r; | |
604 | ||
605 | c->utc = true; | |
606 | c->year = year; | |
607 | c->month = month; | |
608 | c->day = day; | |
609 | c->hour = hour; | |
610 | c->minute = minute; | |
611 | c->microsecond = us; | |
612 | return 0; | |
613 | } | |
614 | ||
74353158 | 615 | static int prepend_component(const char **p, bool usec, unsigned nesting, CalendarComponent **c) { |
c0aebb4b | 616 | int r, start, stop = -1, repeat = 0; |
436dd70f | 617 | CalendarComponent *cc; |
74353158 | 618 | const char *e = *p; |
436dd70f HV |
619 | |
620 | assert(p); | |
621 | assert(c); | |
622 | ||
74353158 ZJS |
623 | if (nesting > CALENDARSPEC_COMPONENTS_MAX) |
624 | return -ENOBUFS; | |
436dd70f | 625 | |
e78fce48 | 626 | r = parse_component_decimal(&e, usec, &start); |
436dd70f HV |
627 | if (r < 0) |
628 | return r; | |
629 | ||
a2eb5ea7 DC |
630 | if (e[0] == '.' && e[1] == '.') { |
631 | e += 2; | |
e78fce48 | 632 | r = parse_component_decimal(&e, usec, &stop); |
a2eb5ea7 DC |
633 | if (r < 0) |
634 | return r; | |
635 | ||
636 | repeat = usec ? USEC_PER_SEC : 1; | |
637 | } | |
638 | ||
436dd70f HV |
639 | if (*e == '/') { |
640 | e++; | |
641 | r = parse_component_decimal(&e, usec, &repeat); | |
642 | if (r < 0) | |
643 | return r; | |
644 | ||
645 | if (repeat == 0) | |
646 | return -ERANGE; | |
36697dc0 LP |
647 | } |
648 | ||
4c701096 | 649 | if (!IN_SET(*e, 0, ' ', ',', '-', '~', ':')) |
36697dc0 LP |
650 | return -EINVAL; |
651 | ||
652 | cc = new0(CalendarComponent, 1); | |
653 | if (!cc) | |
654 | return -ENOMEM; | |
655 | ||
e78fce48 DC |
656 | cc->start = start; |
657 | cc->stop = stop; | |
36697dc0 LP |
658 | cc->repeat = repeat; |
659 | cc->next = *c; | |
660 | ||
661 | *p = e; | |
662 | *c = cc; | |
663 | ||
664 | if (*e ==',') { | |
665 | *p += 1; | |
74353158 | 666 | return prepend_component(p, usec, nesting + 1, c); |
36697dc0 LP |
667 | } |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
436dd70f | 672 | static int parse_chain(const char **p, bool usec, CalendarComponent **c) { |
36697dc0 LP |
673 | const char *t; |
674 | CalendarComponent *cc = NULL; | |
675 | int r; | |
676 | ||
677 | assert(p); | |
678 | assert(c); | |
679 | ||
680 | t = *p; | |
681 | ||
682 | if (t[0] == '*') { | |
436dd70f HV |
683 | if (usec) { |
684 | r = const_chain(0, c); | |
685 | if (r < 0) | |
686 | return r; | |
687 | (*c)->repeat = USEC_PER_SEC; | |
688 | } else | |
689 | *c = NULL; | |
690 | ||
36697dc0 | 691 | *p = t + 1; |
36697dc0 LP |
692 | return 0; |
693 | } | |
694 | ||
74353158 | 695 | r = prepend_component(&t, usec, 0, &cc); |
36697dc0 LP |
696 | if (r < 0) { |
697 | free_chain(cc); | |
698 | return r; | |
699 | } | |
700 | ||
701 | *p = t; | |
702 | *c = cc; | |
703 | return 0; | |
704 | } | |
705 | ||
36697dc0 LP |
706 | static int parse_date(const char **p, CalendarSpec *c) { |
707 | const char *t; | |
708 | int r; | |
709 | CalendarComponent *first, *second, *third; | |
710 | ||
711 | assert(p); | |
712 | assert(*p); | |
713 | assert(c); | |
714 | ||
715 | t = *p; | |
716 | ||
717 | if (*t == 0) | |
718 | return 0; | |
719 | ||
d80e5b74 ZJS |
720 | /* @TIMESTAMP — UNIX time in seconds since the epoch */ |
721 | if (*t == '@') { | |
722 | unsigned long value; | |
723 | time_t time; | |
724 | ||
725 | r = parse_one_number(t + 1, &t, &value); | |
726 | if (r < 0) | |
727 | return r; | |
728 | ||
729 | time = value; | |
730 | if ((unsigned long) time != value) | |
731 | return -ERANGE; | |
732 | ||
733 | r = calendarspec_from_time_t(c, time); | |
734 | if (r < 0) | |
735 | return r; | |
736 | ||
737 | *p = t; | |
738 | return 1; /* finito, don't parse H:M:S after that */ | |
739 | } | |
740 | ||
436dd70f | 741 | r = parse_chain(&t, false, &first); |
36697dc0 LP |
742 | if (r < 0) |
743 | return r; | |
744 | ||
745 | /* Already the end? A ':' as separator? In that case this was a time, not a date */ | |
4c701096 | 746 | if (IN_SET(*t, 0, ':')) { |
36697dc0 LP |
747 | free_chain(first); |
748 | return 0; | |
749 | } | |
750 | ||
8ea80351 DC |
751 | if (*t == '~') |
752 | c->end_of_month = true; | |
753 | else if (*t != '-') { | |
36697dc0 LP |
754 | free_chain(first); |
755 | return -EINVAL; | |
756 | } | |
757 | ||
758 | t++; | |
436dd70f | 759 | r = parse_chain(&t, false, &second); |
36697dc0 LP |
760 | if (r < 0) { |
761 | free_chain(first); | |
762 | return r; | |
763 | } | |
764 | ||
765 | /* Got two parts, hence it's month and day */ | |
4c701096 | 766 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
767 | *p = t + strspn(t, " "); |
768 | c->month = first; | |
769 | c->day = second; | |
770 | return 0; | |
fc2371c7 DC |
771 | } else if (c->end_of_month) { |
772 | free_chain(first); | |
773 | free_chain(second); | |
8ea80351 | 774 | return -EINVAL; |
fc2371c7 | 775 | } |
36697dc0 | 776 | |
8ea80351 DC |
777 | if (*t == '~') |
778 | c->end_of_month = true; | |
779 | else if (*t != '-') { | |
36697dc0 LP |
780 | free_chain(first); |
781 | free_chain(second); | |
782 | return -EINVAL; | |
783 | } | |
784 | ||
785 | t++; | |
436dd70f | 786 | r = parse_chain(&t, false, &third); |
36697dc0 LP |
787 | if (r < 0) { |
788 | free_chain(first); | |
789 | free_chain(second); | |
790 | return r; | |
791 | } | |
792 | ||
8ea80351 | 793 | /* Got three parts, hence it is year, month and day */ |
4c701096 | 794 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
795 | *p = t + strspn(t, " "); |
796 | c->year = first; | |
797 | c->month = second; | |
798 | c->day = third; | |
799 | return 0; | |
800 | } | |
801 | ||
802 | free_chain(first); | |
803 | free_chain(second); | |
804 | free_chain(third); | |
805 | return -EINVAL; | |
806 | } | |
807 | ||
519cffec | 808 | static int parse_calendar_time(const char **p, CalendarSpec *c) { |
36697dc0 LP |
809 | CalendarComponent *h = NULL, *m = NULL, *s = NULL; |
810 | const char *t; | |
811 | int r; | |
812 | ||
813 | assert(p); | |
814 | assert(*p); | |
815 | assert(c); | |
816 | ||
817 | t = *p; | |
818 | ||
408a51e1 DC |
819 | /* If no time is specified at all, then this means 00:00:00 */ |
820 | if (*t == 0) | |
821 | goto null_hour; | |
36697dc0 | 822 | |
436dd70f | 823 | r = parse_chain(&t, false, &h); |
36697dc0 LP |
824 | if (r < 0) |
825 | goto fail; | |
826 | ||
827 | if (*t != ':') { | |
828 | r = -EINVAL; | |
829 | goto fail; | |
830 | } | |
831 | ||
832 | t++; | |
436dd70f | 833 | r = parse_chain(&t, false, &m); |
36697dc0 LP |
834 | if (r < 0) |
835 | goto fail; | |
836 | ||
837 | /* Already at the end? Then it's hours and minutes, and seconds are 0 */ | |
c0df71fa DC |
838 | if (*t == 0) |
839 | goto null_second; | |
36697dc0 LP |
840 | |
841 | if (*t != ':') { | |
842 | r = -EINVAL; | |
843 | goto fail; | |
844 | } | |
845 | ||
846 | t++; | |
436dd70f | 847 | r = parse_chain(&t, true, &s); |
36697dc0 LP |
848 | if (r < 0) |
849 | goto fail; | |
850 | ||
851 | /* At the end? Then it's hours, minutes and seconds */ | |
852 | if (*t == 0) | |
853 | goto finish; | |
854 | ||
855 | r = -EINVAL; | |
856 | goto fail; | |
857 | ||
858 | null_hour: | |
859 | r = const_chain(0, &h); | |
860 | if (r < 0) | |
861 | goto fail; | |
862 | ||
863 | r = const_chain(0, &m); | |
864 | if (r < 0) | |
865 | goto fail; | |
866 | ||
867 | null_second: | |
868 | r = const_chain(0, &s); | |
869 | if (r < 0) | |
870 | goto fail; | |
871 | ||
872 | finish: | |
873 | *p = t; | |
874 | c->hour = h; | |
875 | c->minute = m; | |
436dd70f HV |
876 | c->microsecond = s; |
877 | ||
36697dc0 LP |
878 | return 0; |
879 | ||
880 | fail: | |
881 | free_chain(h); | |
882 | free_chain(m); | |
883 | free_chain(s); | |
884 | return r; | |
885 | } | |
886 | ||
887 | int calendar_spec_from_string(const char *p, CalendarSpec **spec) { | |
21b3a0fc | 888 | const char *utc; |
921b5987 | 889 | _cleanup_(calendar_spec_freep) CalendarSpec *c = NULL; |
36697dc0 LP |
890 | int r; |
891 | ||
892 | assert(p); | |
893 | assert(spec); | |
894 | ||
36697dc0 LP |
895 | c = new0(CalendarSpec, 1); |
896 | if (!c) | |
897 | return -ENOMEM; | |
21b3a0fc | 898 | c->dst = -1; |
48d26c01 | 899 | c->timezone = NULL; |
36697dc0 | 900 | |
078efddd HV |
901 | utc = endswith_no_case(p, " UTC"); |
902 | if (utc) { | |
903 | c->utc = true; | |
904 | p = strndupa(p, utc - p); | |
21b3a0fc LP |
905 | } else { |
906 | const char *e = NULL; | |
907 | int j; | |
908 | ||
909 | tzset(); | |
910 | ||
911 | /* Check if the local timezone was specified? */ | |
912 | for (j = 0; j <= 1; j++) { | |
913 | if (isempty(tzname[j])) | |
914 | continue; | |
915 | ||
916 | e = endswith_no_case(p, tzname[j]); | |
d80e5b74 | 917 | if (!e) |
21b3a0fc LP |
918 | continue; |
919 | if (e == p) | |
920 | continue; | |
921 | if (e[-1] != ' ') | |
922 | continue; | |
923 | ||
924 | break; | |
925 | } | |
926 | ||
927 | /* Found one of the two timezones specified? */ | |
928 | if (IN_SET(j, 0, 1)) { | |
929 | p = strndupa(p, e - p - 1); | |
930 | c->dst = j; | |
48d26c01 IK |
931 | } else { |
932 | const char *last_space; | |
48d26c01 | 933 | |
a2932a0d | 934 | last_space = strrchr(p, ' '); |
089fb865 | 935 | if (last_space != NULL && timezone_is_valid(last_space + 1, LOG_DEBUG)) { |
a2932a0d | 936 | c->timezone = strdup(last_space + 1); |
921b5987 DT |
937 | if (!c->timezone) |
938 | return -ENOMEM; | |
a2932a0d ZJS |
939 | |
940 | p = strndupa(p, last_space - p); | |
48d26c01 | 941 | } |
21b3a0fc | 942 | } |
078efddd | 943 | } |
51ffa239 | 944 | |
921b5987 DT |
945 | if (isempty(p)) |
946 | return -EINVAL; | |
04773cb5 | 947 | |
272ac205 | 948 | if (strcaseeq(p, "minutely")) { |
436dd70f | 949 | r = const_chain(0, &c->microsecond); |
272ac205 | 950 | if (r < 0) |
921b5987 | 951 | return r; |
272ac205 DM |
952 | |
953 | } else if (strcaseeq(p, "hourly")) { | |
36697dc0 LP |
954 | r = const_chain(0, &c->minute); |
955 | if (r < 0) | |
921b5987 | 956 | return r; |
436dd70f | 957 | r = const_chain(0, &c->microsecond); |
36697dc0 | 958 | if (r < 0) |
921b5987 | 959 | return r; |
36697dc0 | 960 | |
b43d1d01 | 961 | } else if (strcaseeq(p, "daily")) { |
36697dc0 LP |
962 | r = const_chain(0, &c->hour); |
963 | if (r < 0) | |
921b5987 | 964 | return r; |
36697dc0 LP |
965 | r = const_chain(0, &c->minute); |
966 | if (r < 0) | |
921b5987 | 967 | return r; |
436dd70f | 968 | r = const_chain(0, &c->microsecond); |
36697dc0 | 969 | if (r < 0) |
921b5987 | 970 | return r; |
36697dc0 | 971 | |
b43d1d01 | 972 | } else if (strcaseeq(p, "monthly")) { |
36697dc0 LP |
973 | r = const_chain(1, &c->day); |
974 | if (r < 0) | |
921b5987 | 975 | return r; |
36697dc0 LP |
976 | r = const_chain(0, &c->hour); |
977 | if (r < 0) | |
921b5987 | 978 | return r; |
36697dc0 LP |
979 | r = const_chain(0, &c->minute); |
980 | if (r < 0) | |
921b5987 | 981 | return r; |
436dd70f | 982 | r = const_chain(0, &c->microsecond); |
36697dc0 | 983 | if (r < 0) |
921b5987 | 984 | return r; |
36697dc0 | 985 | |
dbfd41e2 LP |
986 | } else if (strcaseeq(p, "annually") || |
987 | strcaseeq(p, "yearly") || | |
988 | strcaseeq(p, "anually") /* backwards compatibility */ ) { | |
989 | ||
13516818 LP |
990 | r = const_chain(1, &c->month); |
991 | if (r < 0) | |
921b5987 | 992 | return r; |
13516818 LP |
993 | r = const_chain(1, &c->day); |
994 | if (r < 0) | |
921b5987 | 995 | return r; |
13516818 LP |
996 | r = const_chain(0, &c->hour); |
997 | if (r < 0) | |
921b5987 | 998 | return r; |
13516818 LP |
999 | r = const_chain(0, &c->minute); |
1000 | if (r < 0) | |
921b5987 | 1001 | return r; |
436dd70f | 1002 | r = const_chain(0, &c->microsecond); |
13516818 | 1003 | if (r < 0) |
921b5987 | 1004 | return r; |
13516818 | 1005 | |
b43d1d01 | 1006 | } else if (strcaseeq(p, "weekly")) { |
36697dc0 LP |
1007 | |
1008 | c->weekdays_bits = 1; | |
1009 | ||
1010 | r = const_chain(0, &c->hour); | |
1011 | if (r < 0) | |
921b5987 | 1012 | return r; |
36697dc0 LP |
1013 | r = const_chain(0, &c->minute); |
1014 | if (r < 0) | |
921b5987 | 1015 | return r; |
436dd70f | 1016 | r = const_chain(0, &c->microsecond); |
dbfd41e2 | 1017 | if (r < 0) |
921b5987 | 1018 | return r; |
dbfd41e2 LP |
1019 | |
1020 | } else if (strcaseeq(p, "quarterly")) { | |
1021 | ||
1022 | r = const_chain(1, &c->month); | |
1023 | if (r < 0) | |
921b5987 | 1024 | return r; |
dbfd41e2 LP |
1025 | r = const_chain(4, &c->month); |
1026 | if (r < 0) | |
921b5987 | 1027 | return r; |
dbfd41e2 LP |
1028 | r = const_chain(7, &c->month); |
1029 | if (r < 0) | |
921b5987 | 1030 | return r; |
dbfd41e2 LP |
1031 | r = const_chain(10, &c->month); |
1032 | if (r < 0) | |
921b5987 | 1033 | return r; |
dbfd41e2 LP |
1034 | r = const_chain(1, &c->day); |
1035 | if (r < 0) | |
921b5987 | 1036 | return r; |
dbfd41e2 LP |
1037 | r = const_chain(0, &c->hour); |
1038 | if (r < 0) | |
921b5987 | 1039 | return r; |
dbfd41e2 LP |
1040 | r = const_chain(0, &c->minute); |
1041 | if (r < 0) | |
921b5987 | 1042 | return r; |
436dd70f | 1043 | r = const_chain(0, &c->microsecond); |
dbfd41e2 | 1044 | if (r < 0) |
921b5987 | 1045 | return r; |
dbfd41e2 LP |
1046 | |
1047 | } else if (strcaseeq(p, "biannually") || | |
1048 | strcaseeq(p, "bi-annually") || | |
1049 | strcaseeq(p, "semiannually") || | |
1050 | strcaseeq(p, "semi-annually")) { | |
1051 | ||
1052 | r = const_chain(1, &c->month); | |
1053 | if (r < 0) | |
921b5987 | 1054 | return r; |
dbfd41e2 LP |
1055 | r = const_chain(7, &c->month); |
1056 | if (r < 0) | |
921b5987 | 1057 | return r; |
dbfd41e2 LP |
1058 | r = const_chain(1, &c->day); |
1059 | if (r < 0) | |
921b5987 | 1060 | return r; |
dbfd41e2 LP |
1061 | r = const_chain(0, &c->hour); |
1062 | if (r < 0) | |
921b5987 | 1063 | return r; |
dbfd41e2 LP |
1064 | r = const_chain(0, &c->minute); |
1065 | if (r < 0) | |
921b5987 | 1066 | return r; |
436dd70f | 1067 | r = const_chain(0, &c->microsecond); |
36697dc0 | 1068 | if (r < 0) |
921b5987 | 1069 | return r; |
36697dc0 LP |
1070 | |
1071 | } else { | |
1072 | r = parse_weekdays(&p, c); | |
1073 | if (r < 0) | |
921b5987 | 1074 | return r; |
36697dc0 LP |
1075 | |
1076 | r = parse_date(&p, c); | |
1077 | if (r < 0) | |
921b5987 | 1078 | return r; |
36697dc0 | 1079 | |
d80e5b74 ZJS |
1080 | if (r == 0) { |
1081 | r = parse_calendar_time(&p, c); | |
1082 | if (r < 0) | |
921b5987 | 1083 | return r; |
d80e5b74 | 1084 | } |
36697dc0 | 1085 | |
921b5987 DT |
1086 | if (*p != 0) |
1087 | return -EINVAL; | |
36697dc0 LP |
1088 | } |
1089 | ||
1090 | r = calendar_spec_normalize(c); | |
1091 | if (r < 0) | |
921b5987 | 1092 | return r; |
36697dc0 | 1093 | |
921b5987 DT |
1094 | if (!calendar_spec_valid(c)) |
1095 | return -EINVAL; | |
36697dc0 | 1096 | |
921b5987 | 1097 | *spec = TAKE_PTR(c); |
36697dc0 | 1098 | return 0; |
36697dc0 LP |
1099 | } |
1100 | ||
60bf5836 | 1101 | static int find_end_of_month(struct tm *tm, bool utc, int day) { |
a2eb5ea7 DC |
1102 | struct tm t = *tm; |
1103 | ||
1104 | t.tm_mon++; | |
1105 | t.tm_mday = 1 - day; | |
1106 | ||
c477ff14 | 1107 | if (mktime_or_timegm(&t, utc) < 0 || |
a2eb5ea7 DC |
1108 | t.tm_mon != tm->tm_mon) |
1109 | return -1; | |
1110 | ||
1111 | return t.tm_mday; | |
1112 | } | |
1113 | ||
8ea80351 DC |
1114 | static int find_matching_component(const CalendarSpec *spec, const CalendarComponent *c, |
1115 | struct tm *tm, int *val) { | |
482f3b54 | 1116 | const CalendarComponent *p = c; |
e78fce48 | 1117 | int start, stop, d = -1; |
36697dc0 LP |
1118 | bool d_set = false; |
1119 | int r; | |
1120 | ||
1121 | assert(val); | |
1122 | ||
1123 | if (!c) | |
1124 | return 0; | |
1125 | ||
1126 | while (c) { | |
e78fce48 DC |
1127 | start = c->start; |
1128 | stop = c->stop; | |
a2eb5ea7 | 1129 | |
8ea80351 | 1130 | if (spec->end_of_month && p == spec->day) { |
e78fce48 DC |
1131 | start = find_end_of_month(tm, spec->utc, start); |
1132 | stop = find_end_of_month(tm, spec->utc, stop); | |
a2eb5ea7 | 1133 | |
e78fce48 DC |
1134 | if (stop > 0) |
1135 | SWAP_TWO(start, stop); | |
a2eb5ea7 | 1136 | } |
8ea80351 | 1137 | |
e78fce48 | 1138 | if (start >= *val) { |
36697dc0 | 1139 | |
e78fce48 DC |
1140 | if (!d_set || start < d) { |
1141 | d = start; | |
36697dc0 LP |
1142 | d_set = true; |
1143 | } | |
1144 | ||
1145 | } else if (c->repeat > 0) { | |
1146 | int k; | |
1147 | ||
be6b0c21 | 1148 | k = start + c->repeat * DIV_ROUND_UP(*val - start, c->repeat); |
36697dc0 | 1149 | |
e78fce48 | 1150 | if ((!d_set || k < d) && (stop < 0 || k <= stop)) { |
36697dc0 LP |
1151 | d = k; |
1152 | d_set = true; | |
1153 | } | |
1154 | } | |
1155 | ||
482f3b54 | 1156 | c = c->next; |
36697dc0 LP |
1157 | } |
1158 | ||
1159 | if (!d_set) | |
1160 | return -ENOENT; | |
1161 | ||
1162 | r = *val != d; | |
1163 | *val = d; | |
1164 | return r; | |
1165 | } | |
1166 | ||
51ffa239 | 1167 | static bool tm_out_of_bounds(const struct tm *tm, bool utc) { |
36697dc0 LP |
1168 | struct tm t; |
1169 | assert(tm); | |
1170 | ||
1171 | t = *tm; | |
1172 | ||
c477ff14 | 1173 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1174 | return true; |
1175 | ||
f6e7d66b DC |
1176 | /* |
1177 | * Set an upper bound on the year so impossible dates like "*-02-31" | |
1178 | * don't cause find_next() to loop forever. tm_year contains years | |
1179 | * since 1900, so adjust it accordingly. | |
1180 | */ | |
1181 | if (tm->tm_year + 1900 > MAX_YEAR) | |
1182 | return true; | |
1183 | ||
36697dc0 LP |
1184 | /* Did any normalization take place? If so, it was out of bounds before */ |
1185 | return | |
1186 | t.tm_year != tm->tm_year || | |
1187 | t.tm_mon != tm->tm_mon || | |
1188 | t.tm_mday != tm->tm_mday || | |
1189 | t.tm_hour != tm->tm_hour || | |
1190 | t.tm_min != tm->tm_min || | |
1191 | t.tm_sec != tm->tm_sec; | |
1192 | } | |
1193 | ||
51ffa239 | 1194 | static bool matches_weekday(int weekdays_bits, const struct tm *tm, bool utc) { |
36697dc0 LP |
1195 | struct tm t; |
1196 | int k; | |
1197 | ||
489464d0 | 1198 | if (weekdays_bits < 0 || weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
1199 | return true; |
1200 | ||
1201 | t = *tm; | |
c477ff14 | 1202 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1203 | return false; |
1204 | ||
1205 | k = t.tm_wday == 0 ? 6 : t.tm_wday - 1; | |
1206 | return (weekdays_bits & (1 << k)); | |
1207 | } | |
1208 | ||
436dd70f | 1209 | static int find_next(const CalendarSpec *spec, struct tm *tm, usec_t *usec) { |
36697dc0 | 1210 | struct tm c; |
436dd70f | 1211 | int tm_usec; |
36697dc0 LP |
1212 | int r; |
1213 | ||
1214 | assert(spec); | |
1215 | assert(tm); | |
1216 | ||
1217 | c = *tm; | |
436dd70f | 1218 | tm_usec = *usec; |
36697dc0 LP |
1219 | |
1220 | for (;;) { | |
1221 | /* Normalize the current date */ | |
ea3894c1 | 1222 | (void) mktime_or_timegm(&c, spec->utc); |
21b3a0fc | 1223 | c.tm_isdst = spec->dst; |
36697dc0 LP |
1224 | |
1225 | c.tm_year += 1900; | |
8ea80351 | 1226 | r = find_matching_component(spec, spec->year, &c, &c.tm_year); |
36697dc0 LP |
1227 | c.tm_year -= 1900; |
1228 | ||
1229 | if (r > 0) { | |
1230 | c.tm_mon = 0; | |
1231 | c.tm_mday = 1; | |
436dd70f | 1232 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1233 | } |
e308ddca | 1234 | if (r < 0) |
36697dc0 | 1235 | return r; |
e308ddca LP |
1236 | if (tm_out_of_bounds(&c, spec->utc)) |
1237 | return -ENOENT; | |
36697dc0 LP |
1238 | |
1239 | c.tm_mon += 1; | |
8ea80351 | 1240 | r = find_matching_component(spec, spec->month, &c, &c.tm_mon); |
36697dc0 LP |
1241 | c.tm_mon -= 1; |
1242 | ||
1243 | if (r > 0) { | |
1244 | c.tm_mday = 1; | |
436dd70f | 1245 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1246 | } |
51ffa239 | 1247 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1248 | c.tm_year++; |
36697dc0 LP |
1249 | c.tm_mon = 0; |
1250 | c.tm_mday = 1; | |
436dd70f | 1251 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1252 | continue; |
1253 | } | |
1254 | ||
8ea80351 | 1255 | r = find_matching_component(spec, spec->day, &c, &c.tm_mday); |
36697dc0 | 1256 | if (r > 0) |
436dd70f | 1257 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
51ffa239 | 1258 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1259 | c.tm_mon++; |
36697dc0 | 1260 | c.tm_mday = 1; |
436dd70f | 1261 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1262 | continue; |
1263 | } | |
1264 | ||
51ffa239 | 1265 | if (!matches_weekday(spec->weekdays_bits, &c, spec->utc)) { |
36697dc0 | 1266 | c.tm_mday++; |
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->hour, &c, &c.tm_hour); |
36697dc0 | 1272 | if (r > 0) |
a022d76e | 1273 | 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_mday++; |
436dd70f | 1276 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1277 | continue; |
1278 | } | |
1279 | ||
8ea80351 | 1280 | r = find_matching_component(spec, spec->minute, &c, &c.tm_min); |
36697dc0 | 1281 | if (r > 0) |
a022d76e | 1282 | c.tm_sec = tm_usec = 0; |
51ffa239 | 1283 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1284 | c.tm_hour++; |
436dd70f | 1285 | c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1286 | continue; |
1287 | } | |
1288 | ||
436dd70f | 1289 | c.tm_sec = c.tm_sec * USEC_PER_SEC + tm_usec; |
8ea80351 | 1290 | r = find_matching_component(spec, spec->microsecond, &c, &c.tm_sec); |
436dd70f HV |
1291 | tm_usec = c.tm_sec % USEC_PER_SEC; |
1292 | c.tm_sec /= USEC_PER_SEC; | |
1293 | ||
51ffa239 | 1294 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1295 | c.tm_min++; |
436dd70f | 1296 | c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1297 | continue; |
1298 | } | |
1299 | ||
36697dc0 | 1300 | *tm = c; |
436dd70f | 1301 | *usec = tm_usec; |
36697dc0 LP |
1302 | return 0; |
1303 | } | |
1304 | } | |
1305 | ||
48d26c01 | 1306 | static int calendar_spec_next_usec_impl(const CalendarSpec *spec, usec_t usec, usec_t *next) { |
36697dc0 LP |
1307 | struct tm tm; |
1308 | time_t t; | |
1309 | int r; | |
436dd70f | 1310 | usec_t tm_usec; |
36697dc0 LP |
1311 | |
1312 | assert(spec); | |
1313 | assert(next); | |
1314 | ||
1bb4b028 LP |
1315 | if (usec > USEC_TIMESTAMP_FORMATTABLE_MAX) |
1316 | return -EINVAL; | |
1317 | ||
436dd70f HV |
1318 | usec++; |
1319 | t = (time_t) (usec / USEC_PER_SEC); | |
51ffa239 | 1320 | assert_se(localtime_or_gmtime_r(&t, &tm, spec->utc)); |
436dd70f | 1321 | tm_usec = usec % USEC_PER_SEC; |
36697dc0 | 1322 | |
436dd70f | 1323 | r = find_next(spec, &tm, &tm_usec); |
36697dc0 LP |
1324 | if (r < 0) |
1325 | return r; | |
1326 | ||
51ffa239 | 1327 | t = mktime_or_timegm(&tm, spec->utc); |
c477ff14 | 1328 | if (t < 0) |
36697dc0 LP |
1329 | return -EINVAL; |
1330 | ||
436dd70f | 1331 | *next = (usec_t) t * USEC_PER_SEC + tm_usec; |
36697dc0 LP |
1332 | return 0; |
1333 | } | |
48d26c01 IK |
1334 | |
1335 | typedef struct SpecNextResult { | |
1336 | usec_t next; | |
1337 | int return_value; | |
1338 | } SpecNextResult; | |
1339 | ||
1340 | int calendar_spec_next_usec(const CalendarSpec *spec, usec_t usec, usec_t *next) { | |
4c253ed1 | 1341 | SpecNextResult *shared, tmp; |
48d26c01 IK |
1342 | int r; |
1343 | ||
1344 | if (isempty(spec->timezone)) | |
1345 | return calendar_spec_next_usec_impl(spec, usec, next); | |
1346 | ||
1347 | shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0); | |
1348 | if (shared == MAP_FAILED) | |
1349 | return negative_errno(); | |
1350 | ||
1f5d1e02 | 1351 | r = safe_fork("(sd-calendar)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT, NULL); |
4c253ed1 | 1352 | if (r < 0) { |
48d26c01 | 1353 | (void) munmap(shared, sizeof *shared); |
4c253ed1 | 1354 | return r; |
48d26c01 | 1355 | } |
4c253ed1 | 1356 | if (r == 0) { |
48d26c01 IK |
1357 | if (setenv("TZ", spec->timezone, 1) != 0) { |
1358 | shared->return_value = negative_errno(); | |
1359 | _exit(EXIT_FAILURE); | |
1360 | } | |
1361 | ||
1362 | tzset(); | |
1363 | ||
1364 | shared->return_value = calendar_spec_next_usec_impl(spec, usec, &shared->next); | |
1365 | ||
1366 | _exit(EXIT_SUCCESS); | |
1367 | } | |
1368 | ||
48d26c01 | 1369 | tmp = *shared; |
1f5d1e02 | 1370 | if (munmap(shared, sizeof *shared) < 0) |
48d26c01 IK |
1371 | return negative_errno(); |
1372 | ||
1373 | if (tmp.return_value == 0) | |
1374 | *next = tmp.next; | |
1375 | ||
1376 | return tmp.return_value; | |
1377 | } |