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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 | |
36697dc0 LP |
6 | ***/ |
7 | ||
11c3a366 | 8 | #include <alloca.h> |
9dfa81a0 | 9 | #include <ctype.h> |
11c3a366 | 10 | #include <errno.h> |
c0aebb4b | 11 | #include <limits.h> |
11c3a366 TA |
12 | #include <stddef.h> |
13 | #include <stdio.h> | |
0d536673 | 14 | #include <stdio_ext.h> |
36697dc0 LP |
15 | #include <stdlib.h> |
16 | #include <string.h> | |
48d26c01 | 17 | #include <sys/mman.h> |
11c3a366 | 18 | #include <time.h> |
36697dc0 | 19 | |
b5efdb8a | 20 | #include "alloc-util.h" |
36697dc0 | 21 | #include "calendarspec.h" |
0d39fa9c | 22 | #include "fileio.h" |
11c3a366 | 23 | #include "macro.h" |
93cc7779 | 24 | #include "parse-util.h" |
dccca82b | 25 | #include "process-util.h" |
cf0fbc49 | 26 | #include "string-util.h" |
48d26c01 | 27 | #include "time-util.h" |
36697dc0 | 28 | |
a2eb5ea7 DC |
29 | #define BITS_WEEKDAYS 127 |
30 | #define MIN_YEAR 1970 | |
31 | #define MAX_YEAR 2199 | |
489464d0 | 32 | |
74353158 ZJS |
33 | /* An arbitrary limit on the length of the chains of components. We don't want to |
34 | * build a very long linked list, which would be slow to iterate over and might cause | |
35 | * our stack to overflow. It's unlikely that legitimate uses require more than a few | |
36 | * linked compenents anyway. */ | |
37 | #define CALENDARSPEC_COMPONENTS_MAX 240 | |
38 | ||
36697dc0 LP |
39 | static void free_chain(CalendarComponent *c) { |
40 | CalendarComponent *n; | |
41 | ||
42 | while (c) { | |
43 | n = c->next; | |
44 | free(c); | |
45 | c = n; | |
46 | } | |
47 | } | |
48 | ||
7c123d49 | 49 | CalendarSpec* calendar_spec_free(CalendarSpec *c) { |
0b76b4d8 LP |
50 | |
51 | if (!c) | |
7c123d49 | 52 | return NULL; |
36697dc0 LP |
53 | |
54 | free_chain(c->year); | |
55 | free_chain(c->month); | |
56 | free_chain(c->day); | |
57 | free_chain(c->hour); | |
58 | free_chain(c->minute); | |
436dd70f | 59 | free_chain(c->microsecond); |
48d26c01 | 60 | free(c->timezone); |
36697dc0 | 61 | |
7c123d49 | 62 | return mfree(c); |
36697dc0 LP |
63 | } |
64 | ||
65 | static int component_compare(const void *_a, const void *_b) { | |
66 | CalendarComponent * const *a = _a, * const *b = _b; | |
67 | ||
e78fce48 | 68 | if ((*a)->start < (*b)->start) |
36697dc0 | 69 | return -1; |
e78fce48 | 70 | if ((*a)->start > (*b)->start) |
36697dc0 LP |
71 | return 1; |
72 | ||
e78fce48 | 73 | if ((*a)->stop < (*b)->stop) |
a2eb5ea7 | 74 | return -1; |
e78fce48 | 75 | if ((*a)->stop > (*b)->stop) |
a2eb5ea7 DC |
76 | return 1; |
77 | ||
36697dc0 LP |
78 | if ((*a)->repeat < (*b)->repeat) |
79 | return -1; | |
80 | if ((*a)->repeat > (*b)->repeat) | |
81 | return 1; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
a2eb5ea7 | 86 | static void normalize_chain(CalendarComponent **c) { |
36697dc0 LP |
87 | unsigned n = 0, k; |
88 | CalendarComponent **b, *i, **j, *next; | |
89 | ||
90 | assert(c); | |
91 | ||
a2eb5ea7 | 92 | for (i = *c; i; i = i->next) { |
36697dc0 LP |
93 | n++; |
94 | ||
a2eb5ea7 | 95 | /* |
e78fce48 | 96 | * While we're counting the chain, also normalize `stop` |
a2eb5ea7 DC |
97 | * so the length of the range is a multiple of `repeat` |
98 | */ | |
c0aebb4b | 99 | if (i->stop > i->start && i->repeat > 0) |
e78fce48 | 100 | i->stop -= (i->stop - i->start) % i->repeat; |
a2eb5ea7 DC |
101 | |
102 | } | |
103 | ||
36697dc0 LP |
104 | if (n <= 1) |
105 | return; | |
106 | ||
107 | j = b = alloca(sizeof(CalendarComponent*) * n); | |
108 | for (i = *c; i; i = i->next) | |
109 | *(j++) = i; | |
110 | ||
111 | qsort(b, n, sizeof(CalendarComponent*), component_compare); | |
112 | ||
113 | b[n-1]->next = NULL; | |
114 | next = b[n-1]; | |
115 | ||
116 | /* Drop non-unique entries */ | |
117 | for (k = n-1; k > 0; k--) { | |
963e3d83 | 118 | if (component_compare(&b[k-1], &next) == 0) { |
36697dc0 LP |
119 | free(b[k-1]); |
120 | continue; | |
121 | } | |
122 | ||
123 | b[k-1]->next = next; | |
124 | next = b[k-1]; | |
125 | } | |
126 | ||
127 | *c = next; | |
128 | } | |
129 | ||
130 | static void fix_year(CalendarComponent *c) { | |
131 | /* Turns 12 → 2012, 89 → 1989 */ | |
132 | ||
9ed794a3 | 133 | while (c) { |
e78fce48 DC |
134 | if (c->start >= 0 && c->start < 70) |
135 | c->start += 2000; | |
36697dc0 | 136 | |
e78fce48 DC |
137 | if (c->stop >= 0 && c->stop < 70) |
138 | c->stop += 2000; | |
a2eb5ea7 | 139 | |
e78fce48 DC |
140 | if (c->start >= 70 && c->start < 100) |
141 | c->start += 1900; | |
36697dc0 | 142 | |
e78fce48 DC |
143 | if (c->stop >= 70 && c->stop < 100) |
144 | c->stop += 1900; | |
a2eb5ea7 | 145 | |
482f3b54 | 146 | c = c->next; |
36697dc0 LP |
147 | } |
148 | } | |
149 | ||
150 | int calendar_spec_normalize(CalendarSpec *c) { | |
151 | assert(c); | |
152 | ||
10e859a2 LP |
153 | if (streq_ptr(c->timezone, "UTC")) { |
154 | c->utc = true; | |
155 | c->timezone = mfree(c->timezone); | |
156 | } | |
157 | ||
489464d0 | 158 | if (c->weekdays_bits <= 0 || c->weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
159 | c->weekdays_bits = -1; |
160 | ||
8ea80351 DC |
161 | if (c->end_of_month && !c->day) |
162 | c->end_of_month = false; | |
163 | ||
36697dc0 LP |
164 | fix_year(c->year); |
165 | ||
a2eb5ea7 DC |
166 | normalize_chain(&c->year); |
167 | normalize_chain(&c->month); | |
168 | normalize_chain(&c->day); | |
169 | normalize_chain(&c->hour); | |
170 | normalize_chain(&c->minute); | |
171 | normalize_chain(&c->microsecond); | |
36697dc0 LP |
172 | |
173 | return 0; | |
174 | } | |
175 | ||
c58b1b3a | 176 | _pure_ static bool chain_valid(CalendarComponent *c, int from, int to, bool end_of_month) { |
e127f26b ZJS |
177 | assert(to >= from); |
178 | ||
36697dc0 LP |
179 | if (!c) |
180 | return true; | |
181 | ||
a2eb5ea7 DC |
182 | /* Forbid dates more than 28 days from the end of the month */ |
183 | if (end_of_month) | |
184 | to -= 3; | |
185 | ||
e78fce48 | 186 | if (c->start < from || c->start > to) |
36697dc0 LP |
187 | return false; |
188 | ||
e127f26b ZJS |
189 | /* Avoid overly large values that could cause overflow */ |
190 | if (c->repeat > to - from) | |
191 | return false; | |
192 | ||
8ea80351 DC |
193 | /* |
194 | * c->repeat must be short enough so at least one repetition may | |
195 | * occur before the end of the interval. For dates scheduled | |
e78fce48 | 196 | * relative to the end of the month, c->start and c->stop |
a2eb5ea7 | 197 | * correspond to the Nth last day of the month. |
8ea80351 | 198 | */ |
e78fce48 DC |
199 | if (c->stop >= 0) { |
200 | if (c->stop < from || c ->stop > to) | |
a2eb5ea7 | 201 | return false; |
8ea80351 | 202 | |
e78fce48 | 203 | if (c->start + c->repeat > c->stop) |
a2eb5ea7 DC |
204 | return false; |
205 | } else { | |
e78fce48 | 206 | if (end_of_month && c->start - c->repeat < from) |
a2eb5ea7 DC |
207 | return false; |
208 | ||
e78fce48 | 209 | if (!end_of_month && c->start + c->repeat > to) |
a2eb5ea7 DC |
210 | return false; |
211 | } | |
36697dc0 LP |
212 | |
213 | if (c->next) | |
c58b1b3a | 214 | return chain_valid(c->next, from, to, end_of_month); |
36697dc0 LP |
215 | |
216 | return true; | |
217 | } | |
218 | ||
44a6b1b6 | 219 | _pure_ bool calendar_spec_valid(CalendarSpec *c) { |
36697dc0 LP |
220 | assert(c); |
221 | ||
489464d0 | 222 | if (c->weekdays_bits > BITS_WEEKDAYS) |
36697dc0 LP |
223 | return false; |
224 | ||
8ea80351 | 225 | if (!chain_valid(c->year, MIN_YEAR, MAX_YEAR, false)) |
36697dc0 LP |
226 | return false; |
227 | ||
8ea80351 | 228 | if (!chain_valid(c->month, 1, 12, false)) |
36697dc0 LP |
229 | return false; |
230 | ||
8ea80351 | 231 | if (!chain_valid(c->day, 1, 31, c->end_of_month)) |
36697dc0 LP |
232 | return false; |
233 | ||
8ea80351 | 234 | if (!chain_valid(c->hour, 0, 23, false)) |
36697dc0 LP |
235 | return false; |
236 | ||
8ea80351 | 237 | if (!chain_valid(c->minute, 0, 59, false)) |
36697dc0 LP |
238 | return false; |
239 | ||
8ea80351 | 240 | if (!chain_valid(c->microsecond, 0, 60*USEC_PER_SEC-1, false)) |
36697dc0 LP |
241 | return false; |
242 | ||
243 | return true; | |
244 | } | |
245 | ||
246 | static void format_weekdays(FILE *f, const CalendarSpec *c) { | |
247 | static const char *const days[] = { | |
248 | "Mon", | |
249 | "Tue", | |
250 | "Wed", | |
251 | "Thu", | |
252 | "Fri", | |
253 | "Sat", | |
254 | "Sun" | |
255 | }; | |
256 | ||
257 | int l, x; | |
e638d050 | 258 | bool need_comma = false; |
36697dc0 LP |
259 | |
260 | assert(f); | |
261 | assert(c); | |
489464d0 | 262 | assert(c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS); |
36697dc0 LP |
263 | |
264 | for (x = 0, l = -1; x < (int) ELEMENTSOF(days); x++) { | |
265 | ||
266 | if (c->weekdays_bits & (1 << x)) { | |
267 | ||
268 | if (l < 0) { | |
e638d050 | 269 | if (need_comma) |
0d536673 | 270 | fputc(',', f); |
36697dc0 | 271 | else |
e638d050 | 272 | need_comma = true; |
36697dc0 | 273 | |
0d536673 | 274 | fputs(days[x], f); |
36697dc0 LP |
275 | l = x; |
276 | } | |
277 | ||
278 | } else if (l >= 0) { | |
279 | ||
280 | if (x > l + 1) { | |
0d536673 LP |
281 | fputs(x > l + 2 ? ".." : ",", f); |
282 | fputs(days[x-1], f); | |
36697dc0 LP |
283 | } |
284 | ||
285 | l = -1; | |
286 | } | |
287 | } | |
288 | ||
289 | if (l >= 0 && x > l + 1) { | |
0d536673 LP |
290 | fputs(x > l + 2 ? ".." : ",", f); |
291 | fputs(days[x-1], f); | |
36697dc0 LP |
292 | } |
293 | } | |
294 | ||
436dd70f | 295 | static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) { |
7c250321 | 296 | int d = usec ? (int) USEC_PER_SEC : 1; |
9904dc00 | 297 | |
36697dc0 LP |
298 | assert(f); |
299 | ||
300 | if (!c) { | |
0d536673 | 301 | fputc('*', f); |
36697dc0 LP |
302 | return; |
303 | } | |
304 | ||
482f3b54 | 305 | if (usec && c->start == 0 && c->repeat == USEC_PER_SEC && !c->next) { |
0d536673 | 306 | fputc('*', f); |
482f3b54 DC |
307 | return; |
308 | } | |
309 | ||
e78fce48 | 310 | assert(c->start >= 0); |
7c250321 | 311 | |
e78fce48 DC |
312 | fprintf(f, "%0*i", space, c->start / d); |
313 | if (c->start % d > 0) | |
314 | fprintf(f, ".%06i", c->start % d); | |
7c250321 | 315 | |
e78fce48 DC |
316 | if (c->stop > 0) |
317 | fprintf(f, "..%0*i", space, c->stop / d); | |
318 | if (c->stop % d > 0) | |
319 | fprintf(f, ".%06i", c->stop % d); | |
a2eb5ea7 | 320 | |
e78fce48 | 321 | if (c->repeat > 0 && !(c->stop > 0 && c->repeat == d)) |
7c250321 | 322 | fprintf(f, "/%i", c->repeat / d); |
a2eb5ea7 | 323 | if (c->repeat % d > 0) |
7c250321 | 324 | fprintf(f, ".%06i", c->repeat % d); |
36697dc0 | 325 | |
a2eb5ea7 | 326 | if (c->next) { |
0d536673 | 327 | fputc(',', f); |
436dd70f | 328 | format_chain(f, space, c->next, usec); |
36697dc0 LP |
329 | } |
330 | } | |
331 | ||
332 | int calendar_spec_to_string(const CalendarSpec *c, char **p) { | |
333 | char *buf = NULL; | |
334 | size_t sz = 0; | |
335 | FILE *f; | |
dacd6cee | 336 | int r; |
36697dc0 LP |
337 | |
338 | assert(c); | |
339 | assert(p); | |
340 | ||
341 | f = open_memstream(&buf, &sz); | |
342 | if (!f) | |
343 | return -ENOMEM; | |
344 | ||
0d536673 LP |
345 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
346 | ||
489464d0 | 347 | if (c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS) { |
36697dc0 | 348 | format_weekdays(f, c); |
0d536673 | 349 | fputc(' ', f); |
36697dc0 LP |
350 | } |
351 | ||
436dd70f | 352 | format_chain(f, 4, c->year, false); |
0d536673 | 353 | fputc('-', f); |
436dd70f | 354 | format_chain(f, 2, c->month, false); |
0d536673 | 355 | fputc(c->end_of_month ? '~' : '-', f); |
436dd70f | 356 | format_chain(f, 2, c->day, false); |
0d536673 | 357 | fputc(' ', f); |
436dd70f | 358 | format_chain(f, 2, c->hour, false); |
0d536673 | 359 | fputc(':', f); |
436dd70f | 360 | format_chain(f, 2, c->minute, false); |
0d536673 | 361 | fputc(':', f); |
482f3b54 | 362 | format_chain(f, 2, c->microsecond, true); |
36697dc0 | 363 | |
51ffa239 | 364 | if (c->utc) |
0d536673 | 365 | fputs(" UTC", f); |
48d26c01 | 366 | else if (c->timezone != NULL) { |
0d536673 LP |
367 | fputc(' ', f); |
368 | fputs(c->timezone, f); | |
48d26c01 | 369 | } else if (IN_SET(c->dst, 0, 1)) { |
21b3a0fc LP |
370 | |
371 | /* If daylight saving is explicitly on or off, let's show the used timezone. */ | |
372 | ||
373 | tzset(); | |
374 | ||
375 | if (!isempty(tzname[c->dst])) { | |
0d536673 LP |
376 | fputc(' ', f); |
377 | fputs(tzname[c->dst], f); | |
21b3a0fc LP |
378 | } |
379 | } | |
51ffa239 | 380 | |
dacd6cee LP |
381 | r = fflush_and_check(f); |
382 | if (r < 0) { | |
36697dc0 LP |
383 | free(buf); |
384 | fclose(f); | |
dacd6cee | 385 | return r; |
36697dc0 LP |
386 | } |
387 | ||
388 | fclose(f); | |
389 | ||
390 | *p = buf; | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static int parse_weekdays(const char **p, CalendarSpec *c) { | |
395 | static const struct { | |
396 | const char *name; | |
397 | const int nr; | |
398 | } day_nr[] = { | |
399 | { "Monday", 0 }, | |
400 | { "Mon", 0 }, | |
401 | { "Tuesday", 1 }, | |
402 | { "Tue", 1 }, | |
403 | { "Wednesday", 2 }, | |
404 | { "Wed", 2 }, | |
405 | { "Thursday", 3 }, | |
406 | { "Thu", 3 }, | |
407 | { "Friday", 4 }, | |
408 | { "Fri", 4 }, | |
409 | { "Saturday", 5 }, | |
410 | { "Sat", 5 }, | |
411 | { "Sunday", 6 }, | |
412 | { "Sun", 6 } | |
413 | }; | |
414 | ||
415 | int l = -1; | |
416 | bool first = true; | |
417 | ||
418 | assert(p); | |
419 | assert(*p); | |
420 | assert(c); | |
421 | ||
422 | for (;;) { | |
423 | unsigned i; | |
424 | ||
36697dc0 LP |
425 | for (i = 0; i < ELEMENTSOF(day_nr); i++) { |
426 | size_t skip; | |
427 | ||
428 | if (!startswith_no_case(*p, day_nr[i].name)) | |
429 | continue; | |
430 | ||
431 | skip = strlen(day_nr[i].name); | |
432 | ||
4c701096 | 433 | if (!IN_SET((*p)[skip], 0, '-', '.', ',', ' ')) |
36697dc0 LP |
434 | return -EINVAL; |
435 | ||
436 | c->weekdays_bits |= 1 << day_nr[i].nr; | |
437 | ||
438 | if (l >= 0) { | |
439 | int j; | |
440 | ||
441 | if (l > day_nr[i].nr) | |
442 | return -EINVAL; | |
443 | ||
444 | for (j = l + 1; j < day_nr[i].nr; j++) | |
445 | c->weekdays_bits |= 1 << j; | |
446 | } | |
447 | ||
448 | *p += skip; | |
449 | break; | |
450 | } | |
451 | ||
452 | /* Couldn't find this prefix, so let's assume the | |
453 | weekday was not specified and let's continue with | |
454 | the date */ | |
455 | if (i >= ELEMENTSOF(day_nr)) | |
456 | return first ? 0 : -EINVAL; | |
457 | ||
458 | /* We reached the end of the string */ | |
459 | if (**p == 0) | |
460 | return 0; | |
461 | ||
462 | /* We reached the end of the weekday spec part */ | |
463 | if (**p == ' ') { | |
464 | *p += strspn(*p, " "); | |
465 | return 0; | |
466 | } | |
467 | ||
e638d050 DC |
468 | if (**p == '.') { |
469 | if (l >= 0) | |
470 | return -EINVAL; | |
471 | ||
472 | if ((*p)[1] != '.') | |
473 | return -EINVAL; | |
474 | ||
475 | l = day_nr[i].nr; | |
6bae2fd4 | 476 | *p += 2; |
e638d050 DC |
477 | |
478 | /* Support ranges with "-" for backwards compatibility */ | |
479 | } else if (**p == '-') { | |
36697dc0 LP |
480 | if (l >= 0) |
481 | return -EINVAL; | |
482 | ||
483 | l = day_nr[i].nr; | |
6bae2fd4 DC |
484 | *p += 1; |
485 | ||
486 | } else if (**p == ',') { | |
36697dc0 | 487 | l = -1; |
6bae2fd4 DC |
488 | *p += 1; |
489 | } | |
490 | ||
482f3b54 | 491 | /* Allow a trailing comma but not an open range */ |
4c701096 | 492 | if (IN_SET(**p, 0, ' ')) { |
6bae2fd4 DC |
493 | *p += strspn(*p, " "); |
494 | return l < 0 ? 0 : -EINVAL; | |
495 | } | |
36697dc0 | 496 | |
36697dc0 LP |
497 | first = false; |
498 | } | |
499 | } | |
500 | ||
d80e5b74 ZJS |
501 | static int parse_one_number(const char *p, const char **e, unsigned long *ret) { |
502 | char *ee = NULL; | |
503 | unsigned long value; | |
504 | ||
505 | errno = 0; | |
506 | value = strtoul(p, &ee, 10); | |
507 | if (errno > 0) | |
508 | return -errno; | |
509 | if (ee == p) | |
510 | return -EINVAL; | |
511 | ||
512 | *ret = value; | |
513 | *e = ee; | |
514 | return 0; | |
515 | } | |
516 | ||
c0aebb4b | 517 | static int parse_component_decimal(const char **p, bool usec, int *res) { |
436dd70f HV |
518 | unsigned long value; |
519 | const char *e = NULL; | |
436dd70f | 520 | int r; |
36697dc0 | 521 | |
9dfa81a0 DC |
522 | if (!isdigit(**p)) |
523 | return -EINVAL; | |
524 | ||
d80e5b74 ZJS |
525 | r = parse_one_number(*p, &e, &value); |
526 | if (r < 0) | |
527 | return r; | |
36697dc0 | 528 | |
436dd70f HV |
529 | if (usec) { |
530 | if (value * USEC_PER_SEC / USEC_PER_SEC != value) | |
36697dc0 LP |
531 | return -ERANGE; |
532 | ||
436dd70f | 533 | value *= USEC_PER_SEC; |
436dd70f | 534 | |
60bf5836 DC |
535 | /* One "." is a decimal point, but ".." is a range separator */ |
536 | if (e[0] == '.' && e[1] != '.') { | |
537 | unsigned add; | |
36ff0c97 | 538 | |
436dd70f HV |
539 | e++; |
540 | r = parse_fractional_part_u(&e, 6, &add); | |
541 | if (r < 0) | |
542 | return r; | |
543 | ||
544 | if (add + value < value) | |
545 | return -ERANGE; | |
546 | value += add; | |
547 | } | |
548 | } | |
549 | ||
c0aebb4b DC |
550 | if (value > INT_MAX) |
551 | return -ERANGE; | |
552 | ||
436dd70f HV |
553 | *p = e; |
554 | *res = value; | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
32b52369 DC |
559 | static int const_chain(int value, CalendarComponent **c) { |
560 | CalendarComponent *cc = NULL; | |
561 | ||
562 | assert(c); | |
563 | ||
564 | cc = new0(CalendarComponent, 1); | |
565 | if (!cc) | |
566 | return -ENOMEM; | |
567 | ||
e78fce48 DC |
568 | cc->start = value; |
569 | cc->stop = -1; | |
32b52369 DC |
570 | cc->repeat = 0; |
571 | cc->next = *c; | |
572 | ||
573 | *c = cc; | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
d80e5b74 ZJS |
578 | static int calendarspec_from_time_t(CalendarSpec *c, time_t time) { |
579 | struct tm tm; | |
580 | CalendarComponent *year = NULL, *month = NULL, *day = NULL, *hour = NULL, *minute = NULL, *us = NULL; | |
581 | int r; | |
582 | ||
55a30fd4 ZJS |
583 | if (!gmtime_r(&time, &tm)) |
584 | return -ERANGE; | |
d80e5b74 ZJS |
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 | ||
74353158 | 620 | static int prepend_component(const char **p, bool usec, unsigned nesting, CalendarComponent **c) { |
c0aebb4b | 621 | int r, start, stop = -1, repeat = 0; |
436dd70f | 622 | CalendarComponent *cc; |
74353158 | 623 | const char *e = *p; |
436dd70f HV |
624 | |
625 | assert(p); | |
626 | assert(c); | |
627 | ||
74353158 ZJS |
628 | if (nesting > CALENDARSPEC_COMPONENTS_MAX) |
629 | return -ENOBUFS; | |
436dd70f | 630 | |
e78fce48 | 631 | r = parse_component_decimal(&e, usec, &start); |
436dd70f HV |
632 | if (r < 0) |
633 | return r; | |
634 | ||
a2eb5ea7 DC |
635 | if (e[0] == '.' && e[1] == '.') { |
636 | e += 2; | |
e78fce48 | 637 | r = parse_component_decimal(&e, usec, &stop); |
a2eb5ea7 DC |
638 | if (r < 0) |
639 | return r; | |
640 | ||
641 | repeat = usec ? USEC_PER_SEC : 1; | |
642 | } | |
643 | ||
436dd70f HV |
644 | if (*e == '/') { |
645 | e++; | |
646 | r = parse_component_decimal(&e, usec, &repeat); | |
647 | if (r < 0) | |
648 | return r; | |
649 | ||
650 | if (repeat == 0) | |
651 | return -ERANGE; | |
36697dc0 LP |
652 | } |
653 | ||
4c701096 | 654 | if (!IN_SET(*e, 0, ' ', ',', '-', '~', ':')) |
36697dc0 LP |
655 | return -EINVAL; |
656 | ||
657 | cc = new0(CalendarComponent, 1); | |
658 | if (!cc) | |
659 | return -ENOMEM; | |
660 | ||
e78fce48 DC |
661 | cc->start = start; |
662 | cc->stop = stop; | |
36697dc0 LP |
663 | cc->repeat = repeat; |
664 | cc->next = *c; | |
665 | ||
666 | *p = e; | |
667 | *c = cc; | |
668 | ||
669 | if (*e ==',') { | |
670 | *p += 1; | |
74353158 | 671 | return prepend_component(p, usec, nesting + 1, c); |
36697dc0 LP |
672 | } |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
436dd70f | 677 | static int parse_chain(const char **p, bool usec, CalendarComponent **c) { |
36697dc0 LP |
678 | const char *t; |
679 | CalendarComponent *cc = NULL; | |
680 | int r; | |
681 | ||
682 | assert(p); | |
683 | assert(c); | |
684 | ||
685 | t = *p; | |
686 | ||
687 | if (t[0] == '*') { | |
436dd70f HV |
688 | if (usec) { |
689 | r = const_chain(0, c); | |
690 | if (r < 0) | |
691 | return r; | |
692 | (*c)->repeat = USEC_PER_SEC; | |
693 | } else | |
694 | *c = NULL; | |
695 | ||
36697dc0 | 696 | *p = t + 1; |
36697dc0 LP |
697 | return 0; |
698 | } | |
699 | ||
74353158 | 700 | r = prepend_component(&t, usec, 0, &cc); |
36697dc0 LP |
701 | if (r < 0) { |
702 | free_chain(cc); | |
703 | return r; | |
704 | } | |
705 | ||
706 | *p = t; | |
707 | *c = cc; | |
708 | return 0; | |
709 | } | |
710 | ||
36697dc0 LP |
711 | static int parse_date(const char **p, CalendarSpec *c) { |
712 | const char *t; | |
713 | int r; | |
714 | CalendarComponent *first, *second, *third; | |
715 | ||
716 | assert(p); | |
717 | assert(*p); | |
718 | assert(c); | |
719 | ||
720 | t = *p; | |
721 | ||
722 | if (*t == 0) | |
723 | return 0; | |
724 | ||
d80e5b74 ZJS |
725 | /* @TIMESTAMP — UNIX time in seconds since the epoch */ |
726 | if (*t == '@') { | |
727 | unsigned long value; | |
728 | time_t time; | |
729 | ||
730 | r = parse_one_number(t + 1, &t, &value); | |
731 | if (r < 0) | |
732 | return r; | |
733 | ||
734 | time = value; | |
735 | if ((unsigned long) time != value) | |
736 | return -ERANGE; | |
737 | ||
738 | r = calendarspec_from_time_t(c, time); | |
739 | if (r < 0) | |
740 | return r; | |
741 | ||
742 | *p = t; | |
743 | return 1; /* finito, don't parse H:M:S after that */ | |
744 | } | |
745 | ||
436dd70f | 746 | r = parse_chain(&t, false, &first); |
36697dc0 LP |
747 | if (r < 0) |
748 | return r; | |
749 | ||
750 | /* Already the end? A ':' as separator? In that case this was a time, not a date */ | |
4c701096 | 751 | if (IN_SET(*t, 0, ':')) { |
36697dc0 LP |
752 | free_chain(first); |
753 | return 0; | |
754 | } | |
755 | ||
8ea80351 DC |
756 | if (*t == '~') |
757 | c->end_of_month = true; | |
758 | else if (*t != '-') { | |
36697dc0 LP |
759 | free_chain(first); |
760 | return -EINVAL; | |
761 | } | |
762 | ||
763 | t++; | |
436dd70f | 764 | r = parse_chain(&t, false, &second); |
36697dc0 LP |
765 | if (r < 0) { |
766 | free_chain(first); | |
767 | return r; | |
768 | } | |
769 | ||
770 | /* Got two parts, hence it's month and day */ | |
4c701096 | 771 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
772 | *p = t + strspn(t, " "); |
773 | c->month = first; | |
774 | c->day = second; | |
775 | return 0; | |
fc2371c7 DC |
776 | } else if (c->end_of_month) { |
777 | free_chain(first); | |
778 | free_chain(second); | |
8ea80351 | 779 | return -EINVAL; |
fc2371c7 | 780 | } |
36697dc0 | 781 | |
8ea80351 DC |
782 | if (*t == '~') |
783 | c->end_of_month = true; | |
784 | else if (*t != '-') { | |
36697dc0 LP |
785 | free_chain(first); |
786 | free_chain(second); | |
787 | return -EINVAL; | |
788 | } | |
789 | ||
790 | t++; | |
436dd70f | 791 | r = parse_chain(&t, false, &third); |
36697dc0 LP |
792 | if (r < 0) { |
793 | free_chain(first); | |
794 | free_chain(second); | |
795 | return r; | |
796 | } | |
797 | ||
8ea80351 | 798 | /* Got three parts, hence it is year, month and day */ |
4c701096 | 799 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
800 | *p = t + strspn(t, " "); |
801 | c->year = first; | |
802 | c->month = second; | |
803 | c->day = third; | |
804 | return 0; | |
805 | } | |
806 | ||
807 | free_chain(first); | |
808 | free_chain(second); | |
809 | free_chain(third); | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
519cffec | 813 | static int parse_calendar_time(const char **p, CalendarSpec *c) { |
36697dc0 LP |
814 | CalendarComponent *h = NULL, *m = NULL, *s = NULL; |
815 | const char *t; | |
816 | int r; | |
817 | ||
818 | assert(p); | |
819 | assert(*p); | |
820 | assert(c); | |
821 | ||
822 | t = *p; | |
823 | ||
408a51e1 DC |
824 | /* If no time is specified at all, then this means 00:00:00 */ |
825 | if (*t == 0) | |
826 | goto null_hour; | |
36697dc0 | 827 | |
436dd70f | 828 | r = parse_chain(&t, false, &h); |
36697dc0 LP |
829 | if (r < 0) |
830 | goto fail; | |
831 | ||
832 | if (*t != ':') { | |
833 | r = -EINVAL; | |
834 | goto fail; | |
835 | } | |
836 | ||
837 | t++; | |
436dd70f | 838 | r = parse_chain(&t, false, &m); |
36697dc0 LP |
839 | if (r < 0) |
840 | goto fail; | |
841 | ||
842 | /* Already at the end? Then it's hours and minutes, and seconds are 0 */ | |
c0df71fa DC |
843 | if (*t == 0) |
844 | goto null_second; | |
36697dc0 LP |
845 | |
846 | if (*t != ':') { | |
847 | r = -EINVAL; | |
848 | goto fail; | |
849 | } | |
850 | ||
851 | t++; | |
436dd70f | 852 | r = parse_chain(&t, true, &s); |
36697dc0 LP |
853 | if (r < 0) |
854 | goto fail; | |
855 | ||
856 | /* At the end? Then it's hours, minutes and seconds */ | |
857 | if (*t == 0) | |
858 | goto finish; | |
859 | ||
860 | r = -EINVAL; | |
861 | goto fail; | |
862 | ||
863 | null_hour: | |
864 | r = const_chain(0, &h); | |
865 | if (r < 0) | |
866 | goto fail; | |
867 | ||
868 | r = const_chain(0, &m); | |
869 | if (r < 0) | |
870 | goto fail; | |
871 | ||
872 | null_second: | |
873 | r = const_chain(0, &s); | |
874 | if (r < 0) | |
875 | goto fail; | |
876 | ||
877 | finish: | |
878 | *p = t; | |
879 | c->hour = h; | |
880 | c->minute = m; | |
436dd70f HV |
881 | c->microsecond = s; |
882 | ||
36697dc0 LP |
883 | return 0; |
884 | ||
885 | fail: | |
886 | free_chain(h); | |
887 | free_chain(m); | |
888 | free_chain(s); | |
889 | return r; | |
890 | } | |
891 | ||
892 | int calendar_spec_from_string(const char *p, CalendarSpec **spec) { | |
21b3a0fc | 893 | const char *utc; |
36697dc0 LP |
894 | CalendarSpec *c; |
895 | int r; | |
896 | ||
897 | assert(p); | |
898 | assert(spec); | |
899 | ||
36697dc0 LP |
900 | c = new0(CalendarSpec, 1); |
901 | if (!c) | |
902 | return -ENOMEM; | |
21b3a0fc | 903 | c->dst = -1; |
48d26c01 | 904 | c->timezone = NULL; |
36697dc0 | 905 | |
078efddd HV |
906 | utc = endswith_no_case(p, " UTC"); |
907 | if (utc) { | |
908 | c->utc = true; | |
909 | p = strndupa(p, utc - p); | |
21b3a0fc LP |
910 | } else { |
911 | const char *e = NULL; | |
912 | int j; | |
913 | ||
914 | tzset(); | |
915 | ||
916 | /* Check if the local timezone was specified? */ | |
917 | for (j = 0; j <= 1; j++) { | |
918 | if (isempty(tzname[j])) | |
919 | continue; | |
920 | ||
921 | e = endswith_no_case(p, tzname[j]); | |
d80e5b74 | 922 | if (!e) |
21b3a0fc LP |
923 | continue; |
924 | if (e == p) | |
925 | continue; | |
926 | if (e[-1] != ' ') | |
927 | continue; | |
928 | ||
929 | break; | |
930 | } | |
931 | ||
932 | /* Found one of the two timezones specified? */ | |
933 | if (IN_SET(j, 0, 1)) { | |
934 | p = strndupa(p, e - p - 1); | |
935 | c->dst = j; | |
48d26c01 IK |
936 | } else { |
937 | const char *last_space; | |
48d26c01 | 938 | |
a2932a0d ZJS |
939 | last_space = strrchr(p, ' '); |
940 | if (last_space != NULL && timezone_is_valid(last_space + 1)) { | |
941 | c->timezone = strdup(last_space + 1); | |
942 | if (!c->timezone) { | |
943 | r = -ENOMEM; | |
944 | goto fail; | |
48d26c01 | 945 | } |
a2932a0d ZJS |
946 | |
947 | p = strndupa(p, last_space - p); | |
48d26c01 | 948 | } |
21b3a0fc | 949 | } |
078efddd | 950 | } |
51ffa239 | 951 | |
04773cb5 DC |
952 | if (isempty(p)) { |
953 | r = -EINVAL; | |
954 | goto fail; | |
955 | } | |
956 | ||
272ac205 | 957 | if (strcaseeq(p, "minutely")) { |
436dd70f | 958 | r = const_chain(0, &c->microsecond); |
272ac205 DM |
959 | if (r < 0) |
960 | goto fail; | |
961 | ||
962 | } else if (strcaseeq(p, "hourly")) { | |
36697dc0 LP |
963 | r = const_chain(0, &c->minute); |
964 | if (r < 0) | |
965 | goto fail; | |
436dd70f | 966 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
967 | if (r < 0) |
968 | goto fail; | |
969 | ||
b43d1d01 | 970 | } else if (strcaseeq(p, "daily")) { |
36697dc0 LP |
971 | r = const_chain(0, &c->hour); |
972 | if (r < 0) | |
973 | goto fail; | |
974 | r = const_chain(0, &c->minute); | |
975 | if (r < 0) | |
976 | goto fail; | |
436dd70f | 977 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
978 | if (r < 0) |
979 | goto fail; | |
980 | ||
b43d1d01 | 981 | } else if (strcaseeq(p, "monthly")) { |
36697dc0 LP |
982 | r = const_chain(1, &c->day); |
983 | if (r < 0) | |
984 | goto fail; | |
985 | r = const_chain(0, &c->hour); | |
986 | if (r < 0) | |
987 | goto fail; | |
988 | r = const_chain(0, &c->minute); | |
989 | if (r < 0) | |
990 | goto fail; | |
436dd70f | 991 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
992 | if (r < 0) |
993 | goto fail; | |
994 | ||
dbfd41e2 LP |
995 | } else if (strcaseeq(p, "annually") || |
996 | strcaseeq(p, "yearly") || | |
997 | strcaseeq(p, "anually") /* backwards compatibility */ ) { | |
998 | ||
13516818 LP |
999 | r = const_chain(1, &c->month); |
1000 | if (r < 0) | |
1001 | goto fail; | |
1002 | r = const_chain(1, &c->day); | |
1003 | if (r < 0) | |
1004 | goto fail; | |
1005 | r = const_chain(0, &c->hour); | |
1006 | if (r < 0) | |
1007 | goto fail; | |
1008 | r = const_chain(0, &c->minute); | |
1009 | if (r < 0) | |
1010 | goto fail; | |
436dd70f | 1011 | r = const_chain(0, &c->microsecond); |
13516818 LP |
1012 | if (r < 0) |
1013 | goto fail; | |
1014 | ||
b43d1d01 | 1015 | } else if (strcaseeq(p, "weekly")) { |
36697dc0 LP |
1016 | |
1017 | c->weekdays_bits = 1; | |
1018 | ||
1019 | r = const_chain(0, &c->hour); | |
1020 | if (r < 0) | |
1021 | goto fail; | |
1022 | r = const_chain(0, &c->minute); | |
1023 | if (r < 0) | |
1024 | goto fail; | |
436dd70f | 1025 | r = const_chain(0, &c->microsecond); |
dbfd41e2 LP |
1026 | if (r < 0) |
1027 | goto fail; | |
1028 | ||
1029 | } else if (strcaseeq(p, "quarterly")) { | |
1030 | ||
1031 | r = const_chain(1, &c->month); | |
1032 | if (r < 0) | |
1033 | goto fail; | |
1034 | r = const_chain(4, &c->month); | |
1035 | if (r < 0) | |
1036 | goto fail; | |
1037 | r = const_chain(7, &c->month); | |
1038 | if (r < 0) | |
1039 | goto fail; | |
1040 | r = const_chain(10, &c->month); | |
1041 | if (r < 0) | |
1042 | goto fail; | |
1043 | r = const_chain(1, &c->day); | |
1044 | if (r < 0) | |
1045 | goto fail; | |
1046 | r = const_chain(0, &c->hour); | |
1047 | if (r < 0) | |
1048 | goto fail; | |
1049 | r = const_chain(0, &c->minute); | |
1050 | if (r < 0) | |
1051 | goto fail; | |
436dd70f | 1052 | r = const_chain(0, &c->microsecond); |
dbfd41e2 LP |
1053 | if (r < 0) |
1054 | goto fail; | |
1055 | ||
1056 | } else if (strcaseeq(p, "biannually") || | |
1057 | strcaseeq(p, "bi-annually") || | |
1058 | strcaseeq(p, "semiannually") || | |
1059 | strcaseeq(p, "semi-annually")) { | |
1060 | ||
1061 | r = const_chain(1, &c->month); | |
1062 | if (r < 0) | |
1063 | goto fail; | |
1064 | r = const_chain(7, &c->month); | |
1065 | if (r < 0) | |
1066 | goto fail; | |
1067 | r = const_chain(1, &c->day); | |
1068 | if (r < 0) | |
1069 | goto fail; | |
1070 | r = const_chain(0, &c->hour); | |
1071 | if (r < 0) | |
1072 | goto fail; | |
1073 | r = const_chain(0, &c->minute); | |
1074 | if (r < 0) | |
1075 | goto fail; | |
436dd70f | 1076 | r = const_chain(0, &c->microsecond); |
36697dc0 LP |
1077 | if (r < 0) |
1078 | goto fail; | |
1079 | ||
1080 | } else { | |
1081 | r = parse_weekdays(&p, c); | |
1082 | if (r < 0) | |
1083 | goto fail; | |
1084 | ||
1085 | r = parse_date(&p, c); | |
1086 | if (r < 0) | |
1087 | goto fail; | |
1088 | ||
d80e5b74 ZJS |
1089 | if (r == 0) { |
1090 | r = parse_calendar_time(&p, c); | |
1091 | if (r < 0) | |
1092 | goto fail; | |
1093 | } | |
36697dc0 LP |
1094 | |
1095 | if (*p != 0) { | |
1096 | r = -EINVAL; | |
1097 | goto fail; | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | r = calendar_spec_normalize(c); | |
1102 | if (r < 0) | |
1103 | goto fail; | |
1104 | ||
1105 | if (!calendar_spec_valid(c)) { | |
1106 | r = -EINVAL; | |
1107 | goto fail; | |
1108 | } | |
1109 | ||
1110 | *spec = c; | |
1111 | return 0; | |
1112 | ||
1113 | fail: | |
1114 | calendar_spec_free(c); | |
1115 | return r; | |
1116 | } | |
1117 | ||
60bf5836 | 1118 | static int find_end_of_month(struct tm *tm, bool utc, int day) { |
a2eb5ea7 DC |
1119 | struct tm t = *tm; |
1120 | ||
1121 | t.tm_mon++; | |
1122 | t.tm_mday = 1 - day; | |
1123 | ||
c477ff14 | 1124 | if (mktime_or_timegm(&t, utc) < 0 || |
a2eb5ea7 DC |
1125 | t.tm_mon != tm->tm_mon) |
1126 | return -1; | |
1127 | ||
1128 | return t.tm_mday; | |
1129 | } | |
1130 | ||
8ea80351 DC |
1131 | static int find_matching_component(const CalendarSpec *spec, const CalendarComponent *c, |
1132 | struct tm *tm, int *val) { | |
482f3b54 | 1133 | const CalendarComponent *p = c; |
e78fce48 | 1134 | int start, stop, d = -1; |
36697dc0 LP |
1135 | bool d_set = false; |
1136 | int r; | |
1137 | ||
1138 | assert(val); | |
1139 | ||
1140 | if (!c) | |
1141 | return 0; | |
1142 | ||
1143 | while (c) { | |
e78fce48 DC |
1144 | start = c->start; |
1145 | stop = c->stop; | |
a2eb5ea7 | 1146 | |
8ea80351 | 1147 | if (spec->end_of_month && p == spec->day) { |
e78fce48 DC |
1148 | start = find_end_of_month(tm, spec->utc, start); |
1149 | stop = find_end_of_month(tm, spec->utc, stop); | |
a2eb5ea7 | 1150 | |
e78fce48 DC |
1151 | if (stop > 0) |
1152 | SWAP_TWO(start, stop); | |
a2eb5ea7 | 1153 | } |
8ea80351 | 1154 | |
e78fce48 | 1155 | if (start >= *val) { |
36697dc0 | 1156 | |
e78fce48 DC |
1157 | if (!d_set || start < d) { |
1158 | d = start; | |
36697dc0 LP |
1159 | d_set = true; |
1160 | } | |
1161 | ||
1162 | } else if (c->repeat > 0) { | |
1163 | int k; | |
1164 | ||
be6b0c21 | 1165 | k = start + c->repeat * DIV_ROUND_UP(*val - start, c->repeat); |
36697dc0 | 1166 | |
e78fce48 | 1167 | if ((!d_set || k < d) && (stop < 0 || k <= stop)) { |
36697dc0 LP |
1168 | d = k; |
1169 | d_set = true; | |
1170 | } | |
1171 | } | |
1172 | ||
482f3b54 | 1173 | c = c->next; |
36697dc0 LP |
1174 | } |
1175 | ||
1176 | if (!d_set) | |
1177 | return -ENOENT; | |
1178 | ||
1179 | r = *val != d; | |
1180 | *val = d; | |
1181 | return r; | |
1182 | } | |
1183 | ||
51ffa239 | 1184 | static bool tm_out_of_bounds(const struct tm *tm, bool utc) { |
36697dc0 LP |
1185 | struct tm t; |
1186 | assert(tm); | |
1187 | ||
1188 | t = *tm; | |
1189 | ||
c477ff14 | 1190 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1191 | return true; |
1192 | ||
f6e7d66b DC |
1193 | /* |
1194 | * Set an upper bound on the year so impossible dates like "*-02-31" | |
1195 | * don't cause find_next() to loop forever. tm_year contains years | |
1196 | * since 1900, so adjust it accordingly. | |
1197 | */ | |
1198 | if (tm->tm_year + 1900 > MAX_YEAR) | |
1199 | return true; | |
1200 | ||
36697dc0 LP |
1201 | /* Did any normalization take place? If so, it was out of bounds before */ |
1202 | return | |
1203 | t.tm_year != tm->tm_year || | |
1204 | t.tm_mon != tm->tm_mon || | |
1205 | t.tm_mday != tm->tm_mday || | |
1206 | t.tm_hour != tm->tm_hour || | |
1207 | t.tm_min != tm->tm_min || | |
1208 | t.tm_sec != tm->tm_sec; | |
1209 | } | |
1210 | ||
51ffa239 | 1211 | static bool matches_weekday(int weekdays_bits, const struct tm *tm, bool utc) { |
36697dc0 LP |
1212 | struct tm t; |
1213 | int k; | |
1214 | ||
489464d0 | 1215 | if (weekdays_bits < 0 || weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
1216 | return true; |
1217 | ||
1218 | t = *tm; | |
c477ff14 | 1219 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1220 | return false; |
1221 | ||
1222 | k = t.tm_wday == 0 ? 6 : t.tm_wday - 1; | |
1223 | return (weekdays_bits & (1 << k)); | |
1224 | } | |
1225 | ||
436dd70f | 1226 | static int find_next(const CalendarSpec *spec, struct tm *tm, usec_t *usec) { |
36697dc0 | 1227 | struct tm c; |
436dd70f | 1228 | int tm_usec; |
36697dc0 LP |
1229 | int r; |
1230 | ||
1231 | assert(spec); | |
1232 | assert(tm); | |
1233 | ||
1234 | c = *tm; | |
436dd70f | 1235 | tm_usec = *usec; |
36697dc0 LP |
1236 | |
1237 | for (;;) { | |
1238 | /* Normalize the current date */ | |
ea3894c1 | 1239 | (void) mktime_or_timegm(&c, spec->utc); |
21b3a0fc | 1240 | c.tm_isdst = spec->dst; |
36697dc0 LP |
1241 | |
1242 | c.tm_year += 1900; | |
8ea80351 | 1243 | r = find_matching_component(spec, spec->year, &c, &c.tm_year); |
36697dc0 LP |
1244 | c.tm_year -= 1900; |
1245 | ||
1246 | if (r > 0) { | |
1247 | c.tm_mon = 0; | |
1248 | c.tm_mday = 1; | |
436dd70f | 1249 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1250 | } |
e308ddca | 1251 | if (r < 0) |
36697dc0 | 1252 | return r; |
e308ddca LP |
1253 | if (tm_out_of_bounds(&c, spec->utc)) |
1254 | return -ENOENT; | |
36697dc0 LP |
1255 | |
1256 | c.tm_mon += 1; | |
8ea80351 | 1257 | r = find_matching_component(spec, spec->month, &c, &c.tm_mon); |
36697dc0 LP |
1258 | c.tm_mon -= 1; |
1259 | ||
1260 | if (r > 0) { | |
1261 | c.tm_mday = 1; | |
436dd70f | 1262 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1263 | } |
51ffa239 | 1264 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1265 | c.tm_year++; |
36697dc0 LP |
1266 | c.tm_mon = 0; |
1267 | c.tm_mday = 1; | |
436dd70f | 1268 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1269 | continue; |
1270 | } | |
1271 | ||
8ea80351 | 1272 | r = find_matching_component(spec, spec->day, &c, &c.tm_mday); |
36697dc0 | 1273 | if (r > 0) |
436dd70f | 1274 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
51ffa239 | 1275 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1276 | c.tm_mon++; |
36697dc0 | 1277 | c.tm_mday = 1; |
436dd70f | 1278 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1279 | continue; |
1280 | } | |
1281 | ||
51ffa239 | 1282 | if (!matches_weekday(spec->weekdays_bits, &c, spec->utc)) { |
36697dc0 | 1283 | c.tm_mday++; |
436dd70f | 1284 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1285 | continue; |
1286 | } | |
1287 | ||
8ea80351 | 1288 | r = find_matching_component(spec, spec->hour, &c, &c.tm_hour); |
36697dc0 | 1289 | if (r > 0) |
a022d76e | 1290 | c.tm_min = c.tm_sec = tm_usec = 0; |
51ffa239 | 1291 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1292 | c.tm_mday++; |
436dd70f | 1293 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1294 | continue; |
1295 | } | |
1296 | ||
8ea80351 | 1297 | r = find_matching_component(spec, spec->minute, &c, &c.tm_min); |
36697dc0 | 1298 | if (r > 0) |
a022d76e | 1299 | c.tm_sec = tm_usec = 0; |
51ffa239 | 1300 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1301 | c.tm_hour++; |
436dd70f | 1302 | c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1303 | continue; |
1304 | } | |
1305 | ||
436dd70f | 1306 | c.tm_sec = c.tm_sec * USEC_PER_SEC + tm_usec; |
8ea80351 | 1307 | r = find_matching_component(spec, spec->microsecond, &c, &c.tm_sec); |
436dd70f HV |
1308 | tm_usec = c.tm_sec % USEC_PER_SEC; |
1309 | c.tm_sec /= USEC_PER_SEC; | |
1310 | ||
51ffa239 | 1311 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1312 | c.tm_min++; |
436dd70f | 1313 | c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1314 | continue; |
1315 | } | |
1316 | ||
36697dc0 | 1317 | *tm = c; |
436dd70f | 1318 | *usec = tm_usec; |
36697dc0 LP |
1319 | return 0; |
1320 | } | |
1321 | } | |
1322 | ||
48d26c01 | 1323 | static int calendar_spec_next_usec_impl(const CalendarSpec *spec, usec_t usec, usec_t *next) { |
36697dc0 LP |
1324 | struct tm tm; |
1325 | time_t t; | |
1326 | int r; | |
436dd70f | 1327 | usec_t tm_usec; |
36697dc0 LP |
1328 | |
1329 | assert(spec); | |
1330 | assert(next); | |
1331 | ||
1bb4b028 LP |
1332 | if (usec > USEC_TIMESTAMP_FORMATTABLE_MAX) |
1333 | return -EINVAL; | |
1334 | ||
436dd70f HV |
1335 | usec++; |
1336 | t = (time_t) (usec / USEC_PER_SEC); | |
51ffa239 | 1337 | assert_se(localtime_or_gmtime_r(&t, &tm, spec->utc)); |
436dd70f | 1338 | tm_usec = usec % USEC_PER_SEC; |
36697dc0 | 1339 | |
436dd70f | 1340 | r = find_next(spec, &tm, &tm_usec); |
36697dc0 LP |
1341 | if (r < 0) |
1342 | return r; | |
1343 | ||
51ffa239 | 1344 | t = mktime_or_timegm(&tm, spec->utc); |
c477ff14 | 1345 | if (t < 0) |
36697dc0 LP |
1346 | return -EINVAL; |
1347 | ||
436dd70f | 1348 | *next = (usec_t) t * USEC_PER_SEC + tm_usec; |
36697dc0 LP |
1349 | return 0; |
1350 | } | |
48d26c01 IK |
1351 | |
1352 | typedef struct SpecNextResult { | |
1353 | usec_t next; | |
1354 | int return_value; | |
1355 | } SpecNextResult; | |
1356 | ||
1357 | int calendar_spec_next_usec(const CalendarSpec *spec, usec_t usec, usec_t *next) { | |
4c253ed1 | 1358 | SpecNextResult *shared, tmp; |
48d26c01 IK |
1359 | int r; |
1360 | ||
1361 | if (isempty(spec->timezone)) | |
1362 | return calendar_spec_next_usec_impl(spec, usec, next); | |
1363 | ||
1364 | shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0); | |
1365 | if (shared == MAP_FAILED) | |
1366 | return negative_errno(); | |
1367 | ||
1f5d1e02 | 1368 | r = safe_fork("(sd-calendar)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT, NULL); |
4c253ed1 | 1369 | if (r < 0) { |
48d26c01 | 1370 | (void) munmap(shared, sizeof *shared); |
4c253ed1 | 1371 | return r; |
48d26c01 | 1372 | } |
4c253ed1 | 1373 | if (r == 0) { |
48d26c01 IK |
1374 | if (setenv("TZ", spec->timezone, 1) != 0) { |
1375 | shared->return_value = negative_errno(); | |
1376 | _exit(EXIT_FAILURE); | |
1377 | } | |
1378 | ||
1379 | tzset(); | |
1380 | ||
1381 | shared->return_value = calendar_spec_next_usec_impl(spec, usec, &shared->next); | |
1382 | ||
1383 | _exit(EXIT_SUCCESS); | |
1384 | } | |
1385 | ||
48d26c01 | 1386 | tmp = *shared; |
1f5d1e02 | 1387 | if (munmap(shared, sizeof *shared) < 0) |
48d26c01 IK |
1388 | return negative_errno(); |
1389 | ||
1390 | if (tmp.return_value == 0) | |
1391 | *next = tmp.next; | |
1392 | ||
1393 | return tmp.return_value; | |
1394 | } |