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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 | ||
93bab288 YW |
60 | static int component_compare(CalendarComponent * const *a, CalendarComponent * const *b) { |
61 | int r; | |
36697dc0 | 62 | |
93bab288 YW |
63 | r = CMP((*a)->start, (*b)->start); |
64 | if (r != 0) | |
65 | return r; | |
36697dc0 | 66 | |
93bab288 YW |
67 | r = CMP((*a)->stop, (*b)->stop); |
68 | if (r != 0) | |
69 | return r; | |
a2eb5ea7 | 70 | |
93bab288 | 71 | return CMP((*a)->repeat, (*b)->repeat); |
36697dc0 LP |
72 | } |
73 | ||
a2eb5ea7 | 74 | static void normalize_chain(CalendarComponent **c) { |
36697dc0 | 75 | CalendarComponent **b, *i, **j, *next; |
da6053d0 | 76 | size_t n = 0, k; |
36697dc0 LP |
77 | |
78 | assert(c); | |
79 | ||
a2eb5ea7 | 80 | for (i = *c; i; i = i->next) { |
36697dc0 LP |
81 | n++; |
82 | ||
a2eb5ea7 | 83 | /* |
e78fce48 | 84 | * While we're counting the chain, also normalize `stop` |
a2eb5ea7 DC |
85 | * so the length of the range is a multiple of `repeat` |
86 | */ | |
c0aebb4b | 87 | if (i->stop > i->start && i->repeat > 0) |
e78fce48 | 88 | i->stop -= (i->stop - i->start) % i->repeat; |
a2eb5ea7 DC |
89 | |
90 | } | |
91 | ||
36697dc0 LP |
92 | if (n <= 1) |
93 | return; | |
94 | ||
cf409d15 | 95 | j = b = newa(CalendarComponent*, n); |
36697dc0 LP |
96 | for (i = *c; i; i = i->next) |
97 | *(j++) = i; | |
98 | ||
93bab288 | 99 | typesafe_qsort(b, n, component_compare); |
36697dc0 LP |
100 | |
101 | b[n-1]->next = NULL; | |
102 | next = b[n-1]; | |
103 | ||
104 | /* Drop non-unique entries */ | |
105 | for (k = n-1; k > 0; k--) { | |
963e3d83 | 106 | if (component_compare(&b[k-1], &next) == 0) { |
36697dc0 LP |
107 | free(b[k-1]); |
108 | continue; | |
109 | } | |
110 | ||
111 | b[k-1]->next = next; | |
112 | next = b[k-1]; | |
113 | } | |
114 | ||
115 | *c = next; | |
116 | } | |
117 | ||
118 | static void fix_year(CalendarComponent *c) { | |
119 | /* Turns 12 → 2012, 89 → 1989 */ | |
120 | ||
9ed794a3 | 121 | while (c) { |
e78fce48 DC |
122 | if (c->start >= 0 && c->start < 70) |
123 | c->start += 2000; | |
36697dc0 | 124 | |
e78fce48 DC |
125 | if (c->stop >= 0 && c->stop < 70) |
126 | c->stop += 2000; | |
a2eb5ea7 | 127 | |
e78fce48 DC |
128 | if (c->start >= 70 && c->start < 100) |
129 | c->start += 1900; | |
36697dc0 | 130 | |
e78fce48 DC |
131 | if (c->stop >= 70 && c->stop < 100) |
132 | c->stop += 1900; | |
a2eb5ea7 | 133 | |
482f3b54 | 134 | c = c->next; |
36697dc0 LP |
135 | } |
136 | } | |
137 | ||
138 | int calendar_spec_normalize(CalendarSpec *c) { | |
139 | assert(c); | |
140 | ||
10e859a2 LP |
141 | if (streq_ptr(c->timezone, "UTC")) { |
142 | c->utc = true; | |
143 | c->timezone = mfree(c->timezone); | |
144 | } | |
145 | ||
489464d0 | 146 | if (c->weekdays_bits <= 0 || c->weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
147 | c->weekdays_bits = -1; |
148 | ||
8ea80351 DC |
149 | if (c->end_of_month && !c->day) |
150 | c->end_of_month = false; | |
151 | ||
36697dc0 LP |
152 | fix_year(c->year); |
153 | ||
a2eb5ea7 DC |
154 | normalize_chain(&c->year); |
155 | normalize_chain(&c->month); | |
156 | normalize_chain(&c->day); | |
157 | normalize_chain(&c->hour); | |
158 | normalize_chain(&c->minute); | |
159 | normalize_chain(&c->microsecond); | |
36697dc0 LP |
160 | |
161 | return 0; | |
162 | } | |
163 | ||
c58b1b3a | 164 | _pure_ static bool chain_valid(CalendarComponent *c, int from, int to, bool end_of_month) { |
e127f26b ZJS |
165 | assert(to >= from); |
166 | ||
36697dc0 LP |
167 | if (!c) |
168 | return true; | |
169 | ||
a2eb5ea7 DC |
170 | /* Forbid dates more than 28 days from the end of the month */ |
171 | if (end_of_month) | |
172 | to -= 3; | |
173 | ||
e78fce48 | 174 | if (c->start < from || c->start > to) |
36697dc0 LP |
175 | return false; |
176 | ||
e127f26b ZJS |
177 | /* Avoid overly large values that could cause overflow */ |
178 | if (c->repeat > to - from) | |
179 | return false; | |
180 | ||
8ea80351 DC |
181 | /* |
182 | * c->repeat must be short enough so at least one repetition may | |
183 | * occur before the end of the interval. For dates scheduled | |
e78fce48 | 184 | * relative to the end of the month, c->start and c->stop |
a2eb5ea7 | 185 | * correspond to the Nth last day of the month. |
8ea80351 | 186 | */ |
e78fce48 DC |
187 | if (c->stop >= 0) { |
188 | if (c->stop < from || c ->stop > to) | |
a2eb5ea7 | 189 | return false; |
8ea80351 | 190 | |
e78fce48 | 191 | if (c->start + c->repeat > c->stop) |
a2eb5ea7 DC |
192 | return false; |
193 | } else { | |
e78fce48 | 194 | if (end_of_month && c->start - c->repeat < from) |
a2eb5ea7 DC |
195 | return false; |
196 | ||
e78fce48 | 197 | if (!end_of_month && c->start + c->repeat > to) |
a2eb5ea7 DC |
198 | return false; |
199 | } | |
36697dc0 LP |
200 | |
201 | if (c->next) | |
c58b1b3a | 202 | return chain_valid(c->next, from, to, end_of_month); |
36697dc0 LP |
203 | |
204 | return true; | |
205 | } | |
206 | ||
44a6b1b6 | 207 | _pure_ bool calendar_spec_valid(CalendarSpec *c) { |
36697dc0 LP |
208 | assert(c); |
209 | ||
489464d0 | 210 | if (c->weekdays_bits > BITS_WEEKDAYS) |
36697dc0 LP |
211 | return false; |
212 | ||
8ea80351 | 213 | if (!chain_valid(c->year, MIN_YEAR, MAX_YEAR, false)) |
36697dc0 LP |
214 | return false; |
215 | ||
8ea80351 | 216 | if (!chain_valid(c->month, 1, 12, false)) |
36697dc0 LP |
217 | return false; |
218 | ||
8ea80351 | 219 | if (!chain_valid(c->day, 1, 31, c->end_of_month)) |
36697dc0 LP |
220 | return false; |
221 | ||
8ea80351 | 222 | if (!chain_valid(c->hour, 0, 23, false)) |
36697dc0 LP |
223 | return false; |
224 | ||
8ea80351 | 225 | if (!chain_valid(c->minute, 0, 59, false)) |
36697dc0 LP |
226 | return false; |
227 | ||
8ea80351 | 228 | if (!chain_valid(c->microsecond, 0, 60*USEC_PER_SEC-1, false)) |
36697dc0 LP |
229 | return false; |
230 | ||
231 | return true; | |
232 | } | |
233 | ||
234 | static void format_weekdays(FILE *f, const CalendarSpec *c) { | |
235 | static const char *const days[] = { | |
236 | "Mon", | |
237 | "Tue", | |
238 | "Wed", | |
239 | "Thu", | |
240 | "Fri", | |
241 | "Sat", | |
242 | "Sun" | |
243 | }; | |
244 | ||
245 | int l, x; | |
e638d050 | 246 | bool need_comma = false; |
36697dc0 LP |
247 | |
248 | assert(f); | |
249 | assert(c); | |
489464d0 | 250 | assert(c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS); |
36697dc0 LP |
251 | |
252 | for (x = 0, l = -1; x < (int) ELEMENTSOF(days); x++) { | |
253 | ||
254 | if (c->weekdays_bits & (1 << x)) { | |
255 | ||
256 | if (l < 0) { | |
e638d050 | 257 | if (need_comma) |
0d536673 | 258 | fputc(',', f); |
36697dc0 | 259 | else |
e638d050 | 260 | need_comma = true; |
36697dc0 | 261 | |
0d536673 | 262 | fputs(days[x], f); |
36697dc0 LP |
263 | l = x; |
264 | } | |
265 | ||
266 | } else if (l >= 0) { | |
267 | ||
268 | if (x > l + 1) { | |
0d536673 LP |
269 | fputs(x > l + 2 ? ".." : ",", f); |
270 | fputs(days[x-1], f); | |
36697dc0 LP |
271 | } |
272 | ||
273 | l = -1; | |
274 | } | |
275 | } | |
276 | ||
277 | if (l >= 0 && x > l + 1) { | |
0d536673 LP |
278 | fputs(x > l + 2 ? ".." : ",", f); |
279 | fputs(days[x-1], f); | |
36697dc0 LP |
280 | } |
281 | } | |
282 | ||
436dd70f | 283 | static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) { |
7c250321 | 284 | int d = usec ? (int) USEC_PER_SEC : 1; |
9904dc00 | 285 | |
36697dc0 LP |
286 | assert(f); |
287 | ||
288 | if (!c) { | |
0d536673 | 289 | fputc('*', f); |
36697dc0 LP |
290 | return; |
291 | } | |
292 | ||
482f3b54 | 293 | if (usec && c->start == 0 && c->repeat == USEC_PER_SEC && !c->next) { |
0d536673 | 294 | fputc('*', f); |
482f3b54 DC |
295 | return; |
296 | } | |
297 | ||
e78fce48 | 298 | assert(c->start >= 0); |
7c250321 | 299 | |
e78fce48 DC |
300 | fprintf(f, "%0*i", space, c->start / d); |
301 | if (c->start % d > 0) | |
302 | fprintf(f, ".%06i", c->start % d); | |
7c250321 | 303 | |
e78fce48 DC |
304 | if (c->stop > 0) |
305 | fprintf(f, "..%0*i", space, c->stop / d); | |
306 | if (c->stop % d > 0) | |
307 | fprintf(f, ".%06i", c->stop % d); | |
a2eb5ea7 | 308 | |
e78fce48 | 309 | if (c->repeat > 0 && !(c->stop > 0 && c->repeat == d)) |
7c250321 | 310 | fprintf(f, "/%i", c->repeat / d); |
a2eb5ea7 | 311 | if (c->repeat % d > 0) |
7c250321 | 312 | fprintf(f, ".%06i", c->repeat % d); |
36697dc0 | 313 | |
a2eb5ea7 | 314 | if (c->next) { |
0d536673 | 315 | fputc(',', f); |
436dd70f | 316 | format_chain(f, space, c->next, usec); |
36697dc0 LP |
317 | } |
318 | } | |
319 | ||
320 | int calendar_spec_to_string(const CalendarSpec *c, char **p) { | |
321 | char *buf = NULL; | |
322 | size_t sz = 0; | |
323 | FILE *f; | |
dacd6cee | 324 | int r; |
36697dc0 LP |
325 | |
326 | assert(c); | |
327 | assert(p); | |
328 | ||
329 | f = open_memstream(&buf, &sz); | |
330 | if (!f) | |
331 | return -ENOMEM; | |
332 | ||
0d536673 LP |
333 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
334 | ||
489464d0 | 335 | if (c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS) { |
36697dc0 | 336 | format_weekdays(f, c); |
0d536673 | 337 | fputc(' ', f); |
36697dc0 LP |
338 | } |
339 | ||
436dd70f | 340 | format_chain(f, 4, c->year, false); |
0d536673 | 341 | fputc('-', f); |
436dd70f | 342 | format_chain(f, 2, c->month, false); |
0d536673 | 343 | fputc(c->end_of_month ? '~' : '-', f); |
436dd70f | 344 | format_chain(f, 2, c->day, false); |
0d536673 | 345 | fputc(' ', f); |
436dd70f | 346 | format_chain(f, 2, c->hour, false); |
0d536673 | 347 | fputc(':', f); |
436dd70f | 348 | format_chain(f, 2, c->minute, false); |
0d536673 | 349 | fputc(':', f); |
482f3b54 | 350 | format_chain(f, 2, c->microsecond, true); |
36697dc0 | 351 | |
51ffa239 | 352 | if (c->utc) |
0d536673 | 353 | fputs(" UTC", f); |
48d26c01 | 354 | else if (c->timezone != NULL) { |
0d536673 LP |
355 | fputc(' ', f); |
356 | fputs(c->timezone, f); | |
48d26c01 | 357 | } else if (IN_SET(c->dst, 0, 1)) { |
21b3a0fc LP |
358 | |
359 | /* If daylight saving is explicitly on or off, let's show the used timezone. */ | |
360 | ||
361 | tzset(); | |
362 | ||
363 | if (!isempty(tzname[c->dst])) { | |
0d536673 LP |
364 | fputc(' ', f); |
365 | fputs(tzname[c->dst], f); | |
21b3a0fc LP |
366 | } |
367 | } | |
51ffa239 | 368 | |
dacd6cee LP |
369 | r = fflush_and_check(f); |
370 | if (r < 0) { | |
36697dc0 LP |
371 | free(buf); |
372 | fclose(f); | |
dacd6cee | 373 | return r; |
36697dc0 LP |
374 | } |
375 | ||
376 | fclose(f); | |
377 | ||
378 | *p = buf; | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static int parse_weekdays(const char **p, CalendarSpec *c) { | |
383 | static const struct { | |
384 | const char *name; | |
385 | const int nr; | |
386 | } day_nr[] = { | |
387 | { "Monday", 0 }, | |
388 | { "Mon", 0 }, | |
389 | { "Tuesday", 1 }, | |
390 | { "Tue", 1 }, | |
391 | { "Wednesday", 2 }, | |
392 | { "Wed", 2 }, | |
393 | { "Thursday", 3 }, | |
394 | { "Thu", 3 }, | |
395 | { "Friday", 4 }, | |
396 | { "Fri", 4 }, | |
397 | { "Saturday", 5 }, | |
398 | { "Sat", 5 }, | |
399 | { "Sunday", 6 }, | |
400 | { "Sun", 6 } | |
401 | }; | |
402 | ||
403 | int l = -1; | |
404 | bool first = true; | |
405 | ||
406 | assert(p); | |
407 | assert(*p); | |
408 | assert(c); | |
409 | ||
410 | for (;;) { | |
da6053d0 | 411 | size_t i; |
36697dc0 | 412 | |
36697dc0 LP |
413 | for (i = 0; i < ELEMENTSOF(day_nr); i++) { |
414 | size_t skip; | |
415 | ||
416 | if (!startswith_no_case(*p, day_nr[i].name)) | |
417 | continue; | |
418 | ||
419 | skip = strlen(day_nr[i].name); | |
420 | ||
4c701096 | 421 | if (!IN_SET((*p)[skip], 0, '-', '.', ',', ' ')) |
36697dc0 LP |
422 | return -EINVAL; |
423 | ||
424 | c->weekdays_bits |= 1 << day_nr[i].nr; | |
425 | ||
426 | if (l >= 0) { | |
427 | int j; | |
428 | ||
429 | if (l > day_nr[i].nr) | |
430 | return -EINVAL; | |
431 | ||
432 | for (j = l + 1; j < day_nr[i].nr; j++) | |
433 | c->weekdays_bits |= 1 << j; | |
434 | } | |
435 | ||
436 | *p += skip; | |
437 | break; | |
438 | } | |
439 | ||
440 | /* Couldn't find this prefix, so let's assume the | |
441 | weekday was not specified and let's continue with | |
442 | the date */ | |
443 | if (i >= ELEMENTSOF(day_nr)) | |
444 | return first ? 0 : -EINVAL; | |
445 | ||
446 | /* We reached the end of the string */ | |
447 | if (**p == 0) | |
448 | return 0; | |
449 | ||
450 | /* We reached the end of the weekday spec part */ | |
451 | if (**p == ' ') { | |
452 | *p += strspn(*p, " "); | |
453 | return 0; | |
454 | } | |
455 | ||
e638d050 DC |
456 | if (**p == '.') { |
457 | if (l >= 0) | |
458 | return -EINVAL; | |
459 | ||
460 | if ((*p)[1] != '.') | |
461 | return -EINVAL; | |
462 | ||
463 | l = day_nr[i].nr; | |
6bae2fd4 | 464 | *p += 2; |
e638d050 DC |
465 | |
466 | /* Support ranges with "-" for backwards compatibility */ | |
467 | } else if (**p == '-') { | |
36697dc0 LP |
468 | if (l >= 0) |
469 | return -EINVAL; | |
470 | ||
471 | l = day_nr[i].nr; | |
6bae2fd4 DC |
472 | *p += 1; |
473 | ||
474 | } else if (**p == ',') { | |
36697dc0 | 475 | l = -1; |
6bae2fd4 DC |
476 | *p += 1; |
477 | } | |
478 | ||
482f3b54 | 479 | /* Allow a trailing comma but not an open range */ |
4c701096 | 480 | if (IN_SET(**p, 0, ' ')) { |
6bae2fd4 DC |
481 | *p += strspn(*p, " "); |
482 | return l < 0 ? 0 : -EINVAL; | |
483 | } | |
36697dc0 | 484 | |
36697dc0 LP |
485 | first = false; |
486 | } | |
487 | } | |
488 | ||
d80e5b74 ZJS |
489 | static int parse_one_number(const char *p, const char **e, unsigned long *ret) { |
490 | char *ee = NULL; | |
491 | unsigned long value; | |
492 | ||
493 | errno = 0; | |
494 | value = strtoul(p, &ee, 10); | |
495 | if (errno > 0) | |
496 | return -errno; | |
497 | if (ee == p) | |
498 | return -EINVAL; | |
499 | ||
500 | *ret = value; | |
501 | *e = ee; | |
502 | return 0; | |
503 | } | |
504 | ||
c0aebb4b | 505 | static int parse_component_decimal(const char **p, bool usec, int *res) { |
436dd70f HV |
506 | unsigned long value; |
507 | const char *e = NULL; | |
436dd70f | 508 | int r; |
36697dc0 | 509 | |
9dfa81a0 DC |
510 | if (!isdigit(**p)) |
511 | return -EINVAL; | |
512 | ||
d80e5b74 ZJS |
513 | r = parse_one_number(*p, &e, &value); |
514 | if (r < 0) | |
515 | return r; | |
36697dc0 | 516 | |
436dd70f HV |
517 | if (usec) { |
518 | if (value * USEC_PER_SEC / USEC_PER_SEC != value) | |
36697dc0 LP |
519 | return -ERANGE; |
520 | ||
436dd70f | 521 | value *= USEC_PER_SEC; |
436dd70f | 522 | |
60bf5836 DC |
523 | /* One "." is a decimal point, but ".." is a range separator */ |
524 | if (e[0] == '.' && e[1] != '.') { | |
525 | unsigned add; | |
36ff0c97 | 526 | |
436dd70f HV |
527 | e++; |
528 | r = parse_fractional_part_u(&e, 6, &add); | |
529 | if (r < 0) | |
530 | return r; | |
531 | ||
532 | if (add + value < value) | |
533 | return -ERANGE; | |
534 | value += add; | |
535 | } | |
536 | } | |
537 | ||
c0aebb4b DC |
538 | if (value > INT_MAX) |
539 | return -ERANGE; | |
540 | ||
436dd70f HV |
541 | *p = e; |
542 | *res = value; | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
32b52369 DC |
547 | static int const_chain(int value, CalendarComponent **c) { |
548 | CalendarComponent *cc = NULL; | |
549 | ||
550 | assert(c); | |
551 | ||
552 | cc = new0(CalendarComponent, 1); | |
553 | if (!cc) | |
554 | return -ENOMEM; | |
555 | ||
e78fce48 DC |
556 | cc->start = value; |
557 | cc->stop = -1; | |
32b52369 DC |
558 | cc->repeat = 0; |
559 | cc->next = *c; | |
560 | ||
561 | *c = cc; | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
d80e5b74 ZJS |
566 | static int calendarspec_from_time_t(CalendarSpec *c, time_t time) { |
567 | struct tm tm; | |
568 | CalendarComponent *year = NULL, *month = NULL, *day = NULL, *hour = NULL, *minute = NULL, *us = NULL; | |
569 | int r; | |
570 | ||
55a30fd4 ZJS |
571 | if (!gmtime_r(&time, &tm)) |
572 | return -ERANGE; | |
d80e5b74 ZJS |
573 | |
574 | r = const_chain(tm.tm_year + 1900, &year); | |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
578 | r = const_chain(tm.tm_mon + 1, &month); | |
579 | if (r < 0) | |
580 | return r; | |
581 | ||
582 | r = const_chain(tm.tm_mday, &day); | |
583 | if (r < 0) | |
584 | return r; | |
585 | ||
586 | r = const_chain(tm.tm_hour, &hour); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
590 | r = const_chain(tm.tm_min, &minute); | |
591 | if (r < 0) | |
592 | return r; | |
593 | ||
594 | r = const_chain(tm.tm_sec * USEC_PER_SEC, &us); | |
595 | if (r < 0) | |
596 | return r; | |
597 | ||
598 | c->utc = true; | |
599 | c->year = year; | |
600 | c->month = month; | |
601 | c->day = day; | |
602 | c->hour = hour; | |
603 | c->minute = minute; | |
604 | c->microsecond = us; | |
605 | return 0; | |
606 | } | |
607 | ||
74353158 | 608 | static int prepend_component(const char **p, bool usec, unsigned nesting, CalendarComponent **c) { |
c0aebb4b | 609 | int r, start, stop = -1, repeat = 0; |
436dd70f | 610 | CalendarComponent *cc; |
74353158 | 611 | const char *e = *p; |
436dd70f HV |
612 | |
613 | assert(p); | |
614 | assert(c); | |
615 | ||
74353158 ZJS |
616 | if (nesting > CALENDARSPEC_COMPONENTS_MAX) |
617 | return -ENOBUFS; | |
436dd70f | 618 | |
e78fce48 | 619 | r = parse_component_decimal(&e, usec, &start); |
436dd70f HV |
620 | if (r < 0) |
621 | return r; | |
622 | ||
a2eb5ea7 DC |
623 | if (e[0] == '.' && e[1] == '.') { |
624 | e += 2; | |
e78fce48 | 625 | r = parse_component_decimal(&e, usec, &stop); |
a2eb5ea7 DC |
626 | if (r < 0) |
627 | return r; | |
628 | ||
629 | repeat = usec ? USEC_PER_SEC : 1; | |
630 | } | |
631 | ||
436dd70f HV |
632 | if (*e == '/') { |
633 | e++; | |
634 | r = parse_component_decimal(&e, usec, &repeat); | |
635 | if (r < 0) | |
636 | return r; | |
637 | ||
638 | if (repeat == 0) | |
639 | return -ERANGE; | |
36697dc0 LP |
640 | } |
641 | ||
4c701096 | 642 | if (!IN_SET(*e, 0, ' ', ',', '-', '~', ':')) |
36697dc0 LP |
643 | return -EINVAL; |
644 | ||
645 | cc = new0(CalendarComponent, 1); | |
646 | if (!cc) | |
647 | return -ENOMEM; | |
648 | ||
e78fce48 DC |
649 | cc->start = start; |
650 | cc->stop = stop; | |
36697dc0 LP |
651 | cc->repeat = repeat; |
652 | cc->next = *c; | |
653 | ||
654 | *p = e; | |
655 | *c = cc; | |
656 | ||
657 | if (*e ==',') { | |
658 | *p += 1; | |
74353158 | 659 | return prepend_component(p, usec, nesting + 1, c); |
36697dc0 LP |
660 | } |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
436dd70f | 665 | static int parse_chain(const char **p, bool usec, CalendarComponent **c) { |
36697dc0 LP |
666 | const char *t; |
667 | CalendarComponent *cc = NULL; | |
668 | int r; | |
669 | ||
670 | assert(p); | |
671 | assert(c); | |
672 | ||
673 | t = *p; | |
674 | ||
675 | if (t[0] == '*') { | |
436dd70f HV |
676 | if (usec) { |
677 | r = const_chain(0, c); | |
678 | if (r < 0) | |
679 | return r; | |
680 | (*c)->repeat = USEC_PER_SEC; | |
681 | } else | |
682 | *c = NULL; | |
683 | ||
36697dc0 | 684 | *p = t + 1; |
36697dc0 LP |
685 | return 0; |
686 | } | |
687 | ||
74353158 | 688 | r = prepend_component(&t, usec, 0, &cc); |
36697dc0 LP |
689 | if (r < 0) { |
690 | free_chain(cc); | |
691 | return r; | |
692 | } | |
693 | ||
694 | *p = t; | |
695 | *c = cc; | |
696 | return 0; | |
697 | } | |
698 | ||
36697dc0 LP |
699 | static int parse_date(const char **p, CalendarSpec *c) { |
700 | const char *t; | |
701 | int r; | |
702 | CalendarComponent *first, *second, *third; | |
703 | ||
704 | assert(p); | |
705 | assert(*p); | |
706 | assert(c); | |
707 | ||
708 | t = *p; | |
709 | ||
710 | if (*t == 0) | |
711 | return 0; | |
712 | ||
d80e5b74 ZJS |
713 | /* @TIMESTAMP — UNIX time in seconds since the epoch */ |
714 | if (*t == '@') { | |
715 | unsigned long value; | |
716 | time_t time; | |
717 | ||
718 | r = parse_one_number(t + 1, &t, &value); | |
719 | if (r < 0) | |
720 | return r; | |
721 | ||
722 | time = value; | |
723 | if ((unsigned long) time != value) | |
724 | return -ERANGE; | |
725 | ||
726 | r = calendarspec_from_time_t(c, time); | |
727 | if (r < 0) | |
728 | return r; | |
729 | ||
730 | *p = t; | |
731 | return 1; /* finito, don't parse H:M:S after that */ | |
732 | } | |
733 | ||
436dd70f | 734 | r = parse_chain(&t, false, &first); |
36697dc0 LP |
735 | if (r < 0) |
736 | return r; | |
737 | ||
738 | /* Already the end? A ':' as separator? In that case this was a time, not a date */ | |
4c701096 | 739 | if (IN_SET(*t, 0, ':')) { |
36697dc0 LP |
740 | free_chain(first); |
741 | return 0; | |
742 | } | |
743 | ||
8ea80351 DC |
744 | if (*t == '~') |
745 | c->end_of_month = true; | |
746 | else if (*t != '-') { | |
36697dc0 LP |
747 | free_chain(first); |
748 | return -EINVAL; | |
749 | } | |
750 | ||
751 | t++; | |
436dd70f | 752 | r = parse_chain(&t, false, &second); |
36697dc0 LP |
753 | if (r < 0) { |
754 | free_chain(first); | |
755 | return r; | |
756 | } | |
757 | ||
758 | /* Got two parts, hence it's month and day */ | |
4c701096 | 759 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
760 | *p = t + strspn(t, " "); |
761 | c->month = first; | |
762 | c->day = second; | |
763 | return 0; | |
fc2371c7 DC |
764 | } else if (c->end_of_month) { |
765 | free_chain(first); | |
766 | free_chain(second); | |
8ea80351 | 767 | return -EINVAL; |
fc2371c7 | 768 | } |
36697dc0 | 769 | |
8ea80351 DC |
770 | if (*t == '~') |
771 | c->end_of_month = true; | |
772 | else if (*t != '-') { | |
36697dc0 LP |
773 | free_chain(first); |
774 | free_chain(second); | |
775 | return -EINVAL; | |
776 | } | |
777 | ||
778 | t++; | |
436dd70f | 779 | r = parse_chain(&t, false, &third); |
36697dc0 LP |
780 | if (r < 0) { |
781 | free_chain(first); | |
782 | free_chain(second); | |
783 | return r; | |
784 | } | |
785 | ||
8ea80351 | 786 | /* Got three parts, hence it is year, month and day */ |
4c701096 | 787 | if (IN_SET(*t, 0, ' ')) { |
36697dc0 LP |
788 | *p = t + strspn(t, " "); |
789 | c->year = first; | |
790 | c->month = second; | |
791 | c->day = third; | |
792 | return 0; | |
793 | } | |
794 | ||
795 | free_chain(first); | |
796 | free_chain(second); | |
797 | free_chain(third); | |
798 | return -EINVAL; | |
799 | } | |
800 | ||
519cffec | 801 | static int parse_calendar_time(const char **p, CalendarSpec *c) { |
36697dc0 LP |
802 | CalendarComponent *h = NULL, *m = NULL, *s = NULL; |
803 | const char *t; | |
804 | int r; | |
805 | ||
806 | assert(p); | |
807 | assert(*p); | |
808 | assert(c); | |
809 | ||
810 | t = *p; | |
811 | ||
408a51e1 DC |
812 | /* If no time is specified at all, then this means 00:00:00 */ |
813 | if (*t == 0) | |
814 | goto null_hour; | |
36697dc0 | 815 | |
436dd70f | 816 | r = parse_chain(&t, false, &h); |
36697dc0 LP |
817 | if (r < 0) |
818 | goto fail; | |
819 | ||
820 | if (*t != ':') { | |
821 | r = -EINVAL; | |
822 | goto fail; | |
823 | } | |
824 | ||
825 | t++; | |
436dd70f | 826 | r = parse_chain(&t, false, &m); |
36697dc0 LP |
827 | if (r < 0) |
828 | goto fail; | |
829 | ||
830 | /* Already at the end? Then it's hours and minutes, and seconds are 0 */ | |
c0df71fa DC |
831 | if (*t == 0) |
832 | goto null_second; | |
36697dc0 LP |
833 | |
834 | if (*t != ':') { | |
835 | r = -EINVAL; | |
836 | goto fail; | |
837 | } | |
838 | ||
839 | t++; | |
436dd70f | 840 | r = parse_chain(&t, true, &s); |
36697dc0 LP |
841 | if (r < 0) |
842 | goto fail; | |
843 | ||
844 | /* At the end? Then it's hours, minutes and seconds */ | |
845 | if (*t == 0) | |
846 | goto finish; | |
847 | ||
848 | r = -EINVAL; | |
849 | goto fail; | |
850 | ||
851 | null_hour: | |
852 | r = const_chain(0, &h); | |
853 | if (r < 0) | |
854 | goto fail; | |
855 | ||
856 | r = const_chain(0, &m); | |
857 | if (r < 0) | |
858 | goto fail; | |
859 | ||
860 | null_second: | |
861 | r = const_chain(0, &s); | |
862 | if (r < 0) | |
863 | goto fail; | |
864 | ||
865 | finish: | |
866 | *p = t; | |
867 | c->hour = h; | |
868 | c->minute = m; | |
436dd70f HV |
869 | c->microsecond = s; |
870 | ||
36697dc0 LP |
871 | return 0; |
872 | ||
873 | fail: | |
874 | free_chain(h); | |
875 | free_chain(m); | |
876 | free_chain(s); | |
877 | return r; | |
878 | } | |
879 | ||
880 | int calendar_spec_from_string(const char *p, CalendarSpec **spec) { | |
21b3a0fc | 881 | const char *utc; |
921b5987 | 882 | _cleanup_(calendar_spec_freep) CalendarSpec *c = NULL; |
ea53cfd1 | 883 | _cleanup_free_ char *p_tmp = NULL; |
36697dc0 LP |
884 | int r; |
885 | ||
886 | assert(p); | |
887 | assert(spec); | |
888 | ||
36697dc0 LP |
889 | c = new0(CalendarSpec, 1); |
890 | if (!c) | |
891 | return -ENOMEM; | |
21b3a0fc | 892 | c->dst = -1; |
48d26c01 | 893 | c->timezone = NULL; |
36697dc0 | 894 | |
078efddd HV |
895 | utc = endswith_no_case(p, " UTC"); |
896 | if (utc) { | |
897 | c->utc = true; | |
ea53cfd1 ZJS |
898 | p = p_tmp = strndup(p, utc - p); |
899 | if (!p) | |
900 | return -ENOMEM; | |
21b3a0fc LP |
901 | } else { |
902 | const char *e = NULL; | |
903 | int j; | |
904 | ||
905 | tzset(); | |
906 | ||
907 | /* Check if the local timezone was specified? */ | |
908 | for (j = 0; j <= 1; j++) { | |
909 | if (isempty(tzname[j])) | |
910 | continue; | |
911 | ||
912 | e = endswith_no_case(p, tzname[j]); | |
d80e5b74 | 913 | if (!e) |
21b3a0fc LP |
914 | continue; |
915 | if (e == p) | |
916 | continue; | |
917 | if (e[-1] != ' ') | |
918 | continue; | |
919 | ||
920 | break; | |
921 | } | |
922 | ||
923 | /* Found one of the two timezones specified? */ | |
924 | if (IN_SET(j, 0, 1)) { | |
ea53cfd1 ZJS |
925 | p = p_tmp = strndup(p, e - p - 1); |
926 | if (!p) | |
927 | return -ENOMEM; | |
928 | ||
21b3a0fc | 929 | c->dst = j; |
48d26c01 IK |
930 | } else { |
931 | const char *last_space; | |
48d26c01 | 932 | |
a2932a0d | 933 | last_space = strrchr(p, ' '); |
089fb865 | 934 | if (last_space != NULL && timezone_is_valid(last_space + 1, LOG_DEBUG)) { |
a2932a0d | 935 | c->timezone = strdup(last_space + 1); |
921b5987 DT |
936 | if (!c->timezone) |
937 | return -ENOMEM; | |
a2932a0d | 938 | |
ea53cfd1 ZJS |
939 | p = p_tmp = strndup(p, last_space - p); |
940 | if (!p) | |
941 | return -ENOMEM; | |
48d26c01 | 942 | } |
21b3a0fc | 943 | } |
078efddd | 944 | } |
51ffa239 | 945 | |
921b5987 DT |
946 | if (isempty(p)) |
947 | return -EINVAL; | |
04773cb5 | 948 | |
272ac205 | 949 | if (strcaseeq(p, "minutely")) { |
436dd70f | 950 | r = const_chain(0, &c->microsecond); |
272ac205 | 951 | if (r < 0) |
921b5987 | 952 | return r; |
272ac205 DM |
953 | |
954 | } else if (strcaseeq(p, "hourly")) { | |
36697dc0 LP |
955 | r = const_chain(0, &c->minute); |
956 | if (r < 0) | |
921b5987 | 957 | return r; |
436dd70f | 958 | r = const_chain(0, &c->microsecond); |
36697dc0 | 959 | if (r < 0) |
921b5987 | 960 | return r; |
36697dc0 | 961 | |
b43d1d01 | 962 | } else if (strcaseeq(p, "daily")) { |
36697dc0 LP |
963 | r = const_chain(0, &c->hour); |
964 | if (r < 0) | |
921b5987 | 965 | return r; |
36697dc0 LP |
966 | r = const_chain(0, &c->minute); |
967 | if (r < 0) | |
921b5987 | 968 | return r; |
436dd70f | 969 | r = const_chain(0, &c->microsecond); |
36697dc0 | 970 | if (r < 0) |
921b5987 | 971 | return r; |
36697dc0 | 972 | |
b43d1d01 | 973 | } else if (strcaseeq(p, "monthly")) { |
36697dc0 LP |
974 | r = const_chain(1, &c->day); |
975 | if (r < 0) | |
921b5987 | 976 | return r; |
36697dc0 LP |
977 | r = const_chain(0, &c->hour); |
978 | if (r < 0) | |
921b5987 | 979 | return r; |
36697dc0 LP |
980 | r = const_chain(0, &c->minute); |
981 | if (r < 0) | |
921b5987 | 982 | return r; |
436dd70f | 983 | r = const_chain(0, &c->microsecond); |
36697dc0 | 984 | if (r < 0) |
921b5987 | 985 | return r; |
36697dc0 | 986 | |
dbfd41e2 LP |
987 | } else if (strcaseeq(p, "annually") || |
988 | strcaseeq(p, "yearly") || | |
989 | strcaseeq(p, "anually") /* backwards compatibility */ ) { | |
990 | ||
13516818 LP |
991 | r = const_chain(1, &c->month); |
992 | if (r < 0) | |
921b5987 | 993 | return r; |
13516818 LP |
994 | r = const_chain(1, &c->day); |
995 | if (r < 0) | |
921b5987 | 996 | return r; |
13516818 LP |
997 | r = const_chain(0, &c->hour); |
998 | if (r < 0) | |
921b5987 | 999 | return r; |
13516818 LP |
1000 | r = const_chain(0, &c->minute); |
1001 | if (r < 0) | |
921b5987 | 1002 | return r; |
436dd70f | 1003 | r = const_chain(0, &c->microsecond); |
13516818 | 1004 | if (r < 0) |
921b5987 | 1005 | return r; |
13516818 | 1006 | |
b43d1d01 | 1007 | } else if (strcaseeq(p, "weekly")) { |
36697dc0 LP |
1008 | |
1009 | c->weekdays_bits = 1; | |
1010 | ||
1011 | r = const_chain(0, &c->hour); | |
1012 | if (r < 0) | |
921b5987 | 1013 | return r; |
36697dc0 LP |
1014 | r = const_chain(0, &c->minute); |
1015 | if (r < 0) | |
921b5987 | 1016 | return r; |
436dd70f | 1017 | r = const_chain(0, &c->microsecond); |
dbfd41e2 | 1018 | if (r < 0) |
921b5987 | 1019 | return r; |
dbfd41e2 LP |
1020 | |
1021 | } else if (strcaseeq(p, "quarterly")) { | |
1022 | ||
1023 | r = const_chain(1, &c->month); | |
1024 | if (r < 0) | |
921b5987 | 1025 | return r; |
dbfd41e2 LP |
1026 | r = const_chain(4, &c->month); |
1027 | if (r < 0) | |
921b5987 | 1028 | return r; |
dbfd41e2 LP |
1029 | r = const_chain(7, &c->month); |
1030 | if (r < 0) | |
921b5987 | 1031 | return r; |
dbfd41e2 LP |
1032 | r = const_chain(10, &c->month); |
1033 | if (r < 0) | |
921b5987 | 1034 | return r; |
dbfd41e2 LP |
1035 | r = const_chain(1, &c->day); |
1036 | if (r < 0) | |
921b5987 | 1037 | return r; |
dbfd41e2 LP |
1038 | r = const_chain(0, &c->hour); |
1039 | if (r < 0) | |
921b5987 | 1040 | return r; |
dbfd41e2 LP |
1041 | r = const_chain(0, &c->minute); |
1042 | if (r < 0) | |
921b5987 | 1043 | return r; |
436dd70f | 1044 | r = const_chain(0, &c->microsecond); |
dbfd41e2 | 1045 | if (r < 0) |
921b5987 | 1046 | return r; |
dbfd41e2 LP |
1047 | |
1048 | } else if (strcaseeq(p, "biannually") || | |
1049 | strcaseeq(p, "bi-annually") || | |
1050 | strcaseeq(p, "semiannually") || | |
1051 | strcaseeq(p, "semi-annually")) { | |
1052 | ||
1053 | r = const_chain(1, &c->month); | |
1054 | if (r < 0) | |
921b5987 | 1055 | return r; |
dbfd41e2 LP |
1056 | r = const_chain(7, &c->month); |
1057 | if (r < 0) | |
921b5987 | 1058 | return r; |
dbfd41e2 LP |
1059 | r = const_chain(1, &c->day); |
1060 | if (r < 0) | |
921b5987 | 1061 | return r; |
dbfd41e2 LP |
1062 | r = const_chain(0, &c->hour); |
1063 | if (r < 0) | |
921b5987 | 1064 | return r; |
dbfd41e2 LP |
1065 | r = const_chain(0, &c->minute); |
1066 | if (r < 0) | |
921b5987 | 1067 | return r; |
436dd70f | 1068 | r = const_chain(0, &c->microsecond); |
36697dc0 | 1069 | if (r < 0) |
921b5987 | 1070 | return r; |
36697dc0 LP |
1071 | |
1072 | } else { | |
1073 | r = parse_weekdays(&p, c); | |
1074 | if (r < 0) | |
921b5987 | 1075 | return r; |
36697dc0 LP |
1076 | |
1077 | r = parse_date(&p, c); | |
1078 | if (r < 0) | |
921b5987 | 1079 | return r; |
36697dc0 | 1080 | |
d80e5b74 ZJS |
1081 | if (r == 0) { |
1082 | r = parse_calendar_time(&p, c); | |
1083 | if (r < 0) | |
921b5987 | 1084 | return r; |
d80e5b74 | 1085 | } |
36697dc0 | 1086 | |
921b5987 DT |
1087 | if (*p != 0) |
1088 | return -EINVAL; | |
36697dc0 LP |
1089 | } |
1090 | ||
1091 | r = calendar_spec_normalize(c); | |
1092 | if (r < 0) | |
921b5987 | 1093 | return r; |
36697dc0 | 1094 | |
921b5987 DT |
1095 | if (!calendar_spec_valid(c)) |
1096 | return -EINVAL; | |
36697dc0 | 1097 | |
921b5987 | 1098 | *spec = TAKE_PTR(c); |
36697dc0 | 1099 | return 0; |
36697dc0 LP |
1100 | } |
1101 | ||
60bf5836 | 1102 | static int find_end_of_month(struct tm *tm, bool utc, int day) { |
a2eb5ea7 DC |
1103 | struct tm t = *tm; |
1104 | ||
1105 | t.tm_mon++; | |
1106 | t.tm_mday = 1 - day; | |
1107 | ||
c477ff14 | 1108 | if (mktime_or_timegm(&t, utc) < 0 || |
a2eb5ea7 DC |
1109 | t.tm_mon != tm->tm_mon) |
1110 | return -1; | |
1111 | ||
1112 | return t.tm_mday; | |
1113 | } | |
1114 | ||
8ea80351 DC |
1115 | static int find_matching_component(const CalendarSpec *spec, const CalendarComponent *c, |
1116 | struct tm *tm, int *val) { | |
482f3b54 | 1117 | const CalendarComponent *p = c; |
e78fce48 | 1118 | int start, stop, d = -1; |
36697dc0 LP |
1119 | bool d_set = false; |
1120 | int r; | |
1121 | ||
1122 | assert(val); | |
1123 | ||
1124 | if (!c) | |
1125 | return 0; | |
1126 | ||
1127 | while (c) { | |
e78fce48 DC |
1128 | start = c->start; |
1129 | stop = c->stop; | |
a2eb5ea7 | 1130 | |
8ea80351 | 1131 | if (spec->end_of_month && p == spec->day) { |
e78fce48 DC |
1132 | start = find_end_of_month(tm, spec->utc, start); |
1133 | stop = find_end_of_month(tm, spec->utc, stop); | |
a2eb5ea7 | 1134 | |
e78fce48 DC |
1135 | if (stop > 0) |
1136 | SWAP_TWO(start, stop); | |
a2eb5ea7 | 1137 | } |
8ea80351 | 1138 | |
e78fce48 | 1139 | if (start >= *val) { |
36697dc0 | 1140 | |
e78fce48 DC |
1141 | if (!d_set || start < d) { |
1142 | d = start; | |
36697dc0 LP |
1143 | d_set = true; |
1144 | } | |
1145 | ||
1146 | } else if (c->repeat > 0) { | |
1147 | int k; | |
1148 | ||
be6b0c21 | 1149 | k = start + c->repeat * DIV_ROUND_UP(*val - start, c->repeat); |
36697dc0 | 1150 | |
e78fce48 | 1151 | if ((!d_set || k < d) && (stop < 0 || k <= stop)) { |
36697dc0 LP |
1152 | d = k; |
1153 | d_set = true; | |
1154 | } | |
1155 | } | |
1156 | ||
482f3b54 | 1157 | c = c->next; |
36697dc0 LP |
1158 | } |
1159 | ||
1160 | if (!d_set) | |
1161 | return -ENOENT; | |
1162 | ||
1163 | r = *val != d; | |
1164 | *val = d; | |
1165 | return r; | |
1166 | } | |
1167 | ||
51ffa239 | 1168 | static bool tm_out_of_bounds(const struct tm *tm, bool utc) { |
36697dc0 LP |
1169 | struct tm t; |
1170 | assert(tm); | |
1171 | ||
1172 | t = *tm; | |
1173 | ||
c477ff14 | 1174 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1175 | return true; |
1176 | ||
f6e7d66b DC |
1177 | /* |
1178 | * Set an upper bound on the year so impossible dates like "*-02-31" | |
1179 | * don't cause find_next() to loop forever. tm_year contains years | |
1180 | * since 1900, so adjust it accordingly. | |
1181 | */ | |
1182 | if (tm->tm_year + 1900 > MAX_YEAR) | |
1183 | return true; | |
1184 | ||
36697dc0 LP |
1185 | /* Did any normalization take place? If so, it was out of bounds before */ |
1186 | return | |
1187 | t.tm_year != tm->tm_year || | |
1188 | t.tm_mon != tm->tm_mon || | |
1189 | t.tm_mday != tm->tm_mday || | |
1190 | t.tm_hour != tm->tm_hour || | |
1191 | t.tm_min != tm->tm_min || | |
1192 | t.tm_sec != tm->tm_sec; | |
1193 | } | |
1194 | ||
51ffa239 | 1195 | static bool matches_weekday(int weekdays_bits, const struct tm *tm, bool utc) { |
36697dc0 LP |
1196 | struct tm t; |
1197 | int k; | |
1198 | ||
489464d0 | 1199 | if (weekdays_bits < 0 || weekdays_bits >= BITS_WEEKDAYS) |
36697dc0 LP |
1200 | return true; |
1201 | ||
1202 | t = *tm; | |
c477ff14 | 1203 | if (mktime_or_timegm(&t, utc) < 0) |
36697dc0 LP |
1204 | return false; |
1205 | ||
1206 | k = t.tm_wday == 0 ? 6 : t.tm_wday - 1; | |
1207 | return (weekdays_bits & (1 << k)); | |
1208 | } | |
1209 | ||
436dd70f | 1210 | static int find_next(const CalendarSpec *spec, struct tm *tm, usec_t *usec) { |
36697dc0 | 1211 | struct tm c; |
436dd70f | 1212 | int tm_usec; |
36697dc0 LP |
1213 | int r; |
1214 | ||
1215 | assert(spec); | |
1216 | assert(tm); | |
1217 | ||
1218 | c = *tm; | |
436dd70f | 1219 | tm_usec = *usec; |
36697dc0 LP |
1220 | |
1221 | for (;;) { | |
1222 | /* Normalize the current date */ | |
ea3894c1 | 1223 | (void) mktime_or_timegm(&c, spec->utc); |
21b3a0fc | 1224 | c.tm_isdst = spec->dst; |
36697dc0 LP |
1225 | |
1226 | c.tm_year += 1900; | |
8ea80351 | 1227 | r = find_matching_component(spec, spec->year, &c, &c.tm_year); |
36697dc0 LP |
1228 | c.tm_year -= 1900; |
1229 | ||
1230 | if (r > 0) { | |
1231 | c.tm_mon = 0; | |
1232 | c.tm_mday = 1; | |
436dd70f | 1233 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1234 | } |
e308ddca | 1235 | if (r < 0) |
36697dc0 | 1236 | return r; |
e308ddca LP |
1237 | if (tm_out_of_bounds(&c, spec->utc)) |
1238 | return -ENOENT; | |
36697dc0 LP |
1239 | |
1240 | c.tm_mon += 1; | |
8ea80351 | 1241 | r = find_matching_component(spec, spec->month, &c, &c.tm_mon); |
36697dc0 LP |
1242 | c.tm_mon -= 1; |
1243 | ||
1244 | if (r > 0) { | |
1245 | c.tm_mday = 1; | |
436dd70f | 1246 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 | 1247 | } |
51ffa239 | 1248 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1249 | c.tm_year++; |
36697dc0 LP |
1250 | c.tm_mon = 0; |
1251 | c.tm_mday = 1; | |
436dd70f | 1252 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1253 | continue; |
1254 | } | |
1255 | ||
8ea80351 | 1256 | r = find_matching_component(spec, spec->day, &c, &c.tm_mday); |
36697dc0 | 1257 | if (r > 0) |
436dd70f | 1258 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
51ffa239 | 1259 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1260 | c.tm_mon++; |
36697dc0 | 1261 | c.tm_mday = 1; |
436dd70f | 1262 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1263 | continue; |
1264 | } | |
1265 | ||
51ffa239 | 1266 | if (!matches_weekday(spec->weekdays_bits, &c, spec->utc)) { |
36697dc0 | 1267 | c.tm_mday++; |
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->hour, &c, &c.tm_hour); |
36697dc0 | 1273 | if (r > 0) |
a022d76e | 1274 | 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_mday++; |
436dd70f | 1277 | c.tm_hour = c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1278 | continue; |
1279 | } | |
1280 | ||
8ea80351 | 1281 | r = find_matching_component(spec, spec->minute, &c, &c.tm_min); |
36697dc0 | 1282 | if (r > 0) |
a022d76e | 1283 | c.tm_sec = tm_usec = 0; |
51ffa239 | 1284 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1285 | c.tm_hour++; |
436dd70f | 1286 | c.tm_min = c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1287 | continue; |
1288 | } | |
1289 | ||
436dd70f | 1290 | c.tm_sec = c.tm_sec * USEC_PER_SEC + tm_usec; |
8ea80351 | 1291 | r = find_matching_component(spec, spec->microsecond, &c, &c.tm_sec); |
436dd70f HV |
1292 | tm_usec = c.tm_sec % USEC_PER_SEC; |
1293 | c.tm_sec /= USEC_PER_SEC; | |
1294 | ||
51ffa239 | 1295 | if (r < 0 || tm_out_of_bounds(&c, spec->utc)) { |
313cefa1 | 1296 | c.tm_min++; |
436dd70f | 1297 | c.tm_sec = tm_usec = 0; |
36697dc0 LP |
1298 | continue; |
1299 | } | |
1300 | ||
36697dc0 | 1301 | *tm = c; |
436dd70f | 1302 | *usec = tm_usec; |
36697dc0 LP |
1303 | return 0; |
1304 | } | |
1305 | } | |
1306 | ||
48d26c01 | 1307 | static int calendar_spec_next_usec_impl(const CalendarSpec *spec, usec_t usec, usec_t *next) { |
36697dc0 LP |
1308 | struct tm tm; |
1309 | time_t t; | |
1310 | int r; | |
436dd70f | 1311 | usec_t tm_usec; |
36697dc0 LP |
1312 | |
1313 | assert(spec); | |
1314 | assert(next); | |
1315 | ||
1bb4b028 LP |
1316 | if (usec > USEC_TIMESTAMP_FORMATTABLE_MAX) |
1317 | return -EINVAL; | |
1318 | ||
436dd70f HV |
1319 | usec++; |
1320 | t = (time_t) (usec / USEC_PER_SEC); | |
51ffa239 | 1321 | assert_se(localtime_or_gmtime_r(&t, &tm, spec->utc)); |
436dd70f | 1322 | tm_usec = usec % USEC_PER_SEC; |
36697dc0 | 1323 | |
436dd70f | 1324 | r = find_next(spec, &tm, &tm_usec); |
36697dc0 LP |
1325 | if (r < 0) |
1326 | return r; | |
1327 | ||
51ffa239 | 1328 | t = mktime_or_timegm(&tm, spec->utc); |
c477ff14 | 1329 | if (t < 0) |
36697dc0 LP |
1330 | return -EINVAL; |
1331 | ||
436dd70f | 1332 | *next = (usec_t) t * USEC_PER_SEC + tm_usec; |
36697dc0 LP |
1333 | return 0; |
1334 | } | |
48d26c01 IK |
1335 | |
1336 | typedef struct SpecNextResult { | |
1337 | usec_t next; | |
1338 | int return_value; | |
1339 | } SpecNextResult; | |
1340 | ||
1341 | int calendar_spec_next_usec(const CalendarSpec *spec, usec_t usec, usec_t *next) { | |
4c253ed1 | 1342 | SpecNextResult *shared, tmp; |
48d26c01 IK |
1343 | int r; |
1344 | ||
1345 | if (isempty(spec->timezone)) | |
1346 | return calendar_spec_next_usec_impl(spec, usec, next); | |
1347 | ||
1348 | shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0); | |
1349 | if (shared == MAP_FAILED) | |
1350 | return negative_errno(); | |
1351 | ||
1f5d1e02 | 1352 | r = safe_fork("(sd-calendar)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT, NULL); |
4c253ed1 | 1353 | if (r < 0) { |
48d26c01 | 1354 | (void) munmap(shared, sizeof *shared); |
4c253ed1 | 1355 | return r; |
48d26c01 | 1356 | } |
4c253ed1 | 1357 | if (r == 0) { |
48d26c01 IK |
1358 | if (setenv("TZ", spec->timezone, 1) != 0) { |
1359 | shared->return_value = negative_errno(); | |
1360 | _exit(EXIT_FAILURE); | |
1361 | } | |
1362 | ||
1363 | tzset(); | |
1364 | ||
1365 | shared->return_value = calendar_spec_next_usec_impl(spec, usec, &shared->next); | |
1366 | ||
1367 | _exit(EXIT_SUCCESS); | |
1368 | } | |
1369 | ||
48d26c01 | 1370 | tmp = *shared; |
1f5d1e02 | 1371 | if (munmap(shared, sizeof *shared) < 0) |
48d26c01 IK |
1372 | return negative_errno(); |
1373 | ||
1374 | if (tmp.return_value == 0) | |
1375 | *next = tmp.next; | |
1376 | ||
1377 | return tmp.return_value; | |
1378 | } |