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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
9a98c7a1 | 2 | |
279f52a1 | 3 | #include <ctype.h> |
11c3a366 TA |
4 | #include <errno.h> |
5 | #include <limits.h> | |
6 | #include <stdlib.h> | |
48d26c01 | 7 | #include <sys/mman.h> |
11c3a366 | 8 | #include <sys/time.h> |
77ff2de9 | 9 | #include <sys/timerfd.h> |
07630cea | 10 | #include <sys/timex.h> |
11c3a366 TA |
11 | #include <sys/types.h> |
12 | #include <unistd.h> | |
9a98c7a1 | 13 | |
b5efdb8a | 14 | #include "alloc-util.h" |
3ffd4af2 | 15 | #include "fd-util.h" |
0d39fa9c | 16 | #include "fileio.h" |
f4f15635 | 17 | #include "fs-util.h" |
a2932d51 | 18 | #include "io-util.h" |
11c3a366 TA |
19 | #include "log.h" |
20 | #include "macro.h" | |
3c94e504 | 21 | #include "missing_timerfd.h" |
93cc7779 TA |
22 | #include "parse-util.h" |
23 | #include "path-util.h" | |
dccca82b | 24 | #include "process-util.h" |
a2932d51 | 25 | #include "stat-util.h" |
07630cea | 26 | #include "string-util.h" |
75683450 | 27 | #include "strv.h" |
07630cea | 28 | #include "time-util.h" |
9a98c7a1 | 29 | |
32c1f5a5 LP |
30 | static clockid_t map_clock_id(clockid_t c) { |
31 | ||
32 | /* Some more exotic archs (s390, ppc, …) lack the "ALARM" flavour of the clocks. Thus, clock_gettime() will | |
33 | * fail for them. Since they are essentially the same as their non-ALARM pendants (their only difference is | |
34 | * when timers are set on them), let's just map them accordingly. This way, we can get the correct time even on | |
bdf19f8f | 35 | * those archs. */ |
32c1f5a5 LP |
36 | |
37 | switch (c) { | |
38 | ||
39 | case CLOCK_BOOTTIME_ALARM: | |
bdf19f8f | 40 | return CLOCK_BOOTTIME; |
32c1f5a5 LP |
41 | |
42 | case CLOCK_REALTIME_ALARM: | |
43 | return CLOCK_REALTIME; | |
44 | ||
45 | default: | |
46 | return c; | |
47 | } | |
48 | } | |
49 | ||
9a98c7a1 LP |
50 | usec_t now(clockid_t clock_id) { |
51 | struct timespec ts; | |
52 | ||
32c1f5a5 | 53 | assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0); |
9a98c7a1 LP |
54 | |
55 | return timespec_load(&ts); | |
56 | } | |
57 | ||
45d7a8bb LP |
58 | nsec_t now_nsec(clockid_t clock_id) { |
59 | struct timespec ts; | |
60 | ||
32c1f5a5 | 61 | assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0); |
45d7a8bb LP |
62 | |
63 | return timespec_load_nsec(&ts); | |
64 | } | |
65 | ||
9a98c7a1 LP |
66 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
67 | assert(ts); | |
68 | ||
69 | ts->realtime = now(CLOCK_REALTIME); | |
70 | ts->monotonic = now(CLOCK_MONOTONIC); | |
71 | ||
72 | return ts; | |
73 | } | |
74 | ||
fe624c4c LP |
75 | triple_timestamp* triple_timestamp_get(triple_timestamp *ts) { |
76 | assert(ts); | |
77 | ||
78 | ts->realtime = now(CLOCK_REALTIME); | |
79 | ts->monotonic = now(CLOCK_MONOTONIC); | |
80 | ts->boottime = clock_boottime_supported() ? now(CLOCK_BOOTTIME) : USEC_INFINITY; | |
81 | ||
82 | return ts; | |
83 | } | |
84 | ||
9a98c7a1 LP |
85 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
86 | int64_t delta; | |
87 | assert(ts); | |
88 | ||
75a5f1d8 LP |
89 | if (u == USEC_INFINITY || u <= 0) { |
90 | ts->realtime = ts->monotonic = u; | |
cae0c5e0 LP |
91 | return ts; |
92 | } | |
93 | ||
9a98c7a1 LP |
94 | ts->realtime = u; |
95 | ||
75a5f1d8 | 96 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; |
54d8ef14 | 97 | ts->monotonic = usec_sub_signed(now(CLOCK_MONOTONIC), delta); |
9a98c7a1 LP |
98 | |
99 | return ts; | |
100 | } | |
101 | ||
fe624c4c LP |
102 | triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) { |
103 | int64_t delta; | |
104 | ||
105 | assert(ts); | |
106 | ||
107 | if (u == USEC_INFINITY || u <= 0) { | |
108 | ts->realtime = ts->monotonic = ts->boottime = u; | |
109 | return ts; | |
110 | } | |
111 | ||
112 | ts->realtime = u; | |
113 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
54d8ef14 LP |
114 | ts->monotonic = usec_sub_signed(now(CLOCK_MONOTONIC), delta); |
115 | ts->boottime = clock_boottime_supported() ? usec_sub_signed(now(CLOCK_BOOTTIME), delta) : USEC_INFINITY; | |
fe624c4c LP |
116 | |
117 | return ts; | |
118 | } | |
119 | ||
cae0c5e0 LP |
120 | dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) { |
121 | int64_t delta; | |
122 | assert(ts); | |
123 | ||
3a43da28 KS |
124 | if (u == USEC_INFINITY) { |
125 | ts->realtime = ts->monotonic = USEC_INFINITY; | |
cae0c5e0 LP |
126 | return ts; |
127 | } | |
128 | ||
129 | ts->monotonic = u; | |
130 | delta = (int64_t) now(CLOCK_MONOTONIC) - (int64_t) u; | |
54d8ef14 | 131 | ts->realtime = usec_sub_signed(now(CLOCK_REALTIME), delta); |
cae0c5e0 LP |
132 | |
133 | return ts; | |
134 | } | |
135 | ||
fbe55073 LP |
136 | dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u) { |
137 | int64_t delta; | |
138 | ||
139 | if (u == USEC_INFINITY) { | |
140 | ts->realtime = ts->monotonic = USEC_INFINITY; | |
141 | return ts; | |
142 | } | |
fbe55073 | 143 | |
0345d252 | 144 | dual_timestamp_get(ts); |
fbe55073 | 145 | delta = (int64_t) now(clock_boottime_or_monotonic()) - (int64_t) u; |
54d8ef14 LP |
146 | ts->realtime = usec_sub_signed(ts->realtime, delta); |
147 | ts->monotonic = usec_sub_signed(ts->monotonic, delta); | |
fbe55073 LP |
148 | |
149 | return ts; | |
150 | } | |
151 | ||
fe624c4c LP |
152 | usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) { |
153 | ||
154 | switch (clock) { | |
155 | ||
156 | case CLOCK_REALTIME: | |
157 | case CLOCK_REALTIME_ALARM: | |
158 | return ts->realtime; | |
159 | ||
160 | case CLOCK_MONOTONIC: | |
161 | return ts->monotonic; | |
162 | ||
163 | case CLOCK_BOOTTIME: | |
164 | case CLOCK_BOOTTIME_ALARM: | |
165 | return ts->boottime; | |
166 | ||
167 | default: | |
168 | return USEC_INFINITY; | |
169 | } | |
170 | } | |
171 | ||
9a98c7a1 LP |
172 | usec_t timespec_load(const struct timespec *ts) { |
173 | assert(ts); | |
174 | ||
c477ff14 | 175 | if (ts->tv_sec < 0 || ts->tv_nsec < 0) |
3a43da28 | 176 | return USEC_INFINITY; |
9a98c7a1 LP |
177 | |
178 | if ((usec_t) ts->tv_sec > (UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / USEC_PER_SEC) | |
3a43da28 | 179 | return USEC_INFINITY; |
9a98c7a1 LP |
180 | |
181 | return | |
182 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
183 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
184 | } | |
185 | ||
3a730176 | 186 | nsec_t timespec_load_nsec(const struct timespec *ts) { |
45d7a8bb LP |
187 | assert(ts); |
188 | ||
c477ff14 | 189 | if (ts->tv_sec < 0 || ts->tv_nsec < 0) |
45d7a8bb LP |
190 | return NSEC_INFINITY; |
191 | ||
a2daa2f0 ZJS |
192 | if ((nsec_t) ts->tv_sec >= (UINT64_MAX - ts->tv_nsec) / NSEC_PER_SEC) |
193 | return NSEC_INFINITY; | |
194 | ||
195 | return (nsec_t) ts->tv_sec * NSEC_PER_SEC + (nsec_t) ts->tv_nsec; | |
45d7a8bb LP |
196 | } |
197 | ||
9a98c7a1 LP |
198 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { |
199 | assert(ts); | |
200 | ||
f977849c | 201 | if (u == USEC_INFINITY || |
d201d908 | 202 | u / USEC_PER_SEC >= TIME_T_MAX) { |
9a98c7a1 LP |
203 | ts->tv_sec = (time_t) -1; |
204 | ts->tv_nsec = (long) -1; | |
205 | return ts; | |
206 | } | |
207 | ||
208 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
209 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
210 | ||
211 | return ts; | |
212 | } | |
213 | ||
214 | usec_t timeval_load(const struct timeval *tv) { | |
215 | assert(tv); | |
216 | ||
c477ff14 | 217 | if (tv->tv_sec < 0 || tv->tv_usec < 0) |
3a43da28 | 218 | return USEC_INFINITY; |
9a98c7a1 LP |
219 | |
220 | if ((usec_t) tv->tv_sec > (UINT64_MAX - tv->tv_usec) / USEC_PER_SEC) | |
3a43da28 | 221 | return USEC_INFINITY; |
9a98c7a1 LP |
222 | |
223 | return | |
224 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
225 | (usec_t) tv->tv_usec; | |
226 | } | |
227 | ||
228 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
229 | assert(tv); | |
230 | ||
68bdd2d2 | 231 | if (u == USEC_INFINITY || |
f977849c | 232 | u / USEC_PER_SEC > TIME_T_MAX) { |
9a98c7a1 LP |
233 | tv->tv_sec = (time_t) -1; |
234 | tv->tv_usec = (suseconds_t) -1; | |
4d89874a ZJS |
235 | } else { |
236 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
237 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
9a98c7a1 LP |
238 | } |
239 | ||
9a98c7a1 LP |
240 | return tv; |
241 | } | |
242 | ||
21b3a0fc LP |
243 | static char *format_timestamp_internal( |
244 | char *buf, | |
245 | size_t l, | |
246 | usec_t t, | |
247 | bool utc, | |
248 | bool us) { | |
249 | ||
250 | /* The weekdays in non-localized (English) form. We use this instead of the localized form, so that our | |
251 | * generated timestamps may be parsed with parse_timestamp(), and always read the same. */ | |
252 | static const char * const weekdays[] = { | |
253 | [0] = "Sun", | |
254 | [1] = "Mon", | |
255 | [2] = "Tue", | |
256 | [3] = "Wed", | |
257 | [4] = "Thu", | |
258 | [5] = "Fri", | |
259 | [6] = "Sat", | |
260 | }; | |
261 | ||
9a98c7a1 LP |
262 | struct tm tm; |
263 | time_t sec; | |
21b3a0fc | 264 | size_t n; |
9a98c7a1 LP |
265 | |
266 | assert(buf); | |
9a98c7a1 | 267 | |
8164e306 YW |
268 | if (l < (size_t) (3 + /* week day */ |
269 | 1 + 10 + /* space and date */ | |
270 | 1 + 8 + /* space and time */ | |
271 | (us ? 1 + 6 : 0) + /* "." and microsecond part */ | |
272 | 1 + 1 + /* space and shortest possible zone */ | |
273 | 1)) | |
21b3a0fc | 274 | return NULL; /* Not enough space even for the shortest form. */ |
3a43da28 | 275 | if (t <= 0 || t == USEC_INFINITY) |
21b3a0fc LP |
276 | return NULL; /* Timestamp is unset */ |
277 | ||
1bb4b028 | 278 | /* Let's not format times with years > 9999 */ |
d3d28024 | 279 | if (t > USEC_TIMESTAMP_FORMATTABLE_MAX) { |
490c5a37 | 280 | assert(l >= STRLEN("--- XXXX-XX-XX XX:XX:XX") + 1); |
d3d28024 ZJS |
281 | strcpy(buf, "--- XXXX-XX-XX XX:XX:XX"); |
282 | return buf; | |
283 | } | |
1bb4b028 | 284 | |
21b3a0fc | 285 | sec = (time_t) (t / USEC_PER_SEC); /* Round down */ |
21b3a0fc LP |
286 | |
287 | if (!localtime_or_gmtime_r(&sec, &tm, utc)) | |
9a98c7a1 LP |
288 | return NULL; |
289 | ||
21b3a0fc LP |
290 | /* Start with the week day */ |
291 | assert((size_t) tm.tm_wday < ELEMENTSOF(weekdays)); | |
292 | memcpy(buf, weekdays[tm.tm_wday], 4); | |
9a98c7a1 | 293 | |
21b3a0fc LP |
294 | /* Add the main components */ |
295 | if (strftime(buf + 3, l - 3, " %Y-%m-%d %H:%M:%S", &tm) <= 0) | |
296 | return NULL; /* Doesn't fit */ | |
0056086a | 297 | |
21b3a0fc | 298 | /* Append the microseconds part, if that's requested */ |
0056086a | 299 | if (us) { |
21b3a0fc LP |
300 | n = strlen(buf); |
301 | if (n + 8 > l) | |
302 | return NULL; /* Microseconds part doesn't fit. */ | |
303 | ||
70887c5f | 304 | sprintf(buf + n, ".%06"PRI_USEC, t % USEC_PER_SEC); |
21b3a0fc LP |
305 | } |
306 | ||
307 | /* Append the timezone */ | |
308 | n = strlen(buf); | |
309 | if (utc) { | |
310 | /* If this is UTC then let's explicitly use the "UTC" string here, because gmtime_r() normally uses the | |
311 | * obsolete "GMT" instead. */ | |
312 | if (n + 5 > l) | |
313 | return NULL; /* "UTC" doesn't fit. */ | |
314 | ||
315 | strcpy(buf + n, " UTC"); | |
316 | ||
317 | } else if (!isempty(tm.tm_zone)) { | |
318 | size_t tn; | |
319 | ||
320 | /* An explicit timezone is specified, let's use it, if it fits */ | |
321 | tn = strlen(tm.tm_zone); | |
322 | if (n + 1 + tn + 1 > l) { | |
323 | /* The full time zone does not fit in. Yuck. */ | |
324 | ||
325 | if (n + 1 + _POSIX_TZNAME_MAX + 1 > l) | |
326 | return NULL; /* Not even enough space for the POSIX minimum (of 6)? In that case, complain that it doesn't fit */ | |
327 | ||
328 | /* So the time zone doesn't fit in fully, but the caller passed enough space for the POSIX | |
329 | * minimum time zone length. In this case suppress the timezone entirely, in order not to dump | |
330 | * an overly long, hard to read string on the user. This should be safe, because the user will | |
331 | * assume the local timezone anyway if none is shown. And so does parse_timestamp(). */ | |
332 | } else { | |
333 | buf[n++] = ' '; | |
334 | strcpy(buf + n, tm.tm_zone); | |
335 | } | |
0056086a | 336 | } |
9a98c7a1 LP |
337 | |
338 | return buf; | |
339 | } | |
340 | ||
a62e83b4 | 341 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
0056086a | 342 | return format_timestamp_internal(buf, l, t, false, false); |
a62e83b4 JS |
343 | } |
344 | ||
5ab99e07 | 345 | char *format_timestamp_utc(char *buf, size_t l, usec_t t) { |
0056086a | 346 | return format_timestamp_internal(buf, l, t, true, false); |
f02d8367 ZJS |
347 | } |
348 | ||
5ab99e07 | 349 | char *format_timestamp_us(char *buf, size_t l, usec_t t) { |
0056086a | 350 | return format_timestamp_internal(buf, l, t, false, true); |
5ab99e07 LP |
351 | } |
352 | ||
353 | char *format_timestamp_us_utc(char *buf, size_t l, usec_t t) { | |
0056086a | 354 | return format_timestamp_internal(buf, l, t, true, true); |
5ab99e07 LP |
355 | } |
356 | ||
bbb8486e | 357 | char *format_timestamp_relative(char *buf, size_t l, usec_t t) { |
1fcf71f5 | 358 | const char *s; |
9a98c7a1 LP |
359 | usec_t n, d; |
360 | ||
65de0395 | 361 | if (t <= 0 || t == USEC_INFINITY) |
9a98c7a1 LP |
362 | return NULL; |
363 | ||
65de0395 | 364 | n = now(CLOCK_REALTIME); |
1fcf71f5 LP |
365 | if (n > t) { |
366 | d = n - t; | |
367 | s = "ago"; | |
368 | } else { | |
369 | d = t - n; | |
370 | s = "left"; | |
371 | } | |
9a98c7a1 LP |
372 | |
373 | if (d >= USEC_PER_YEAR) | |
609e002e | 374 | snprintf(buf, l, USEC_FMT " years " USEC_FMT " months %s", |
de0671ee ZJS |
375 | d / USEC_PER_YEAR, |
376 | (d % USEC_PER_YEAR) / USEC_PER_MONTH, s); | |
9a98c7a1 | 377 | else if (d >= USEC_PER_MONTH) |
609e002e | 378 | snprintf(buf, l, USEC_FMT " months " USEC_FMT " days %s", |
de0671ee ZJS |
379 | d / USEC_PER_MONTH, |
380 | (d % USEC_PER_MONTH) / USEC_PER_DAY, s); | |
9a98c7a1 | 381 | else if (d >= USEC_PER_WEEK) |
609e002e | 382 | snprintf(buf, l, USEC_FMT " weeks " USEC_FMT " days %s", |
de0671ee ZJS |
383 | d / USEC_PER_WEEK, |
384 | (d % USEC_PER_WEEK) / USEC_PER_DAY, s); | |
9a98c7a1 | 385 | else if (d >= 2*USEC_PER_DAY) |
609e002e | 386 | snprintf(buf, l, USEC_FMT " days %s", d / USEC_PER_DAY, s); |
9a98c7a1 | 387 | else if (d >= 25*USEC_PER_HOUR) |
609e002e | 388 | snprintf(buf, l, "1 day " USEC_FMT "h %s", |
de0671ee | 389 | (d - USEC_PER_DAY) / USEC_PER_HOUR, s); |
9a98c7a1 | 390 | else if (d >= 6*USEC_PER_HOUR) |
609e002e | 391 | snprintf(buf, l, USEC_FMT "h %s", |
de0671ee | 392 | d / USEC_PER_HOUR, s); |
9a98c7a1 | 393 | else if (d >= USEC_PER_HOUR) |
609e002e | 394 | snprintf(buf, l, USEC_FMT "h " USEC_FMT "min %s", |
de0671ee ZJS |
395 | d / USEC_PER_HOUR, |
396 | (d % USEC_PER_HOUR) / USEC_PER_MINUTE, s); | |
9a98c7a1 | 397 | else if (d >= 5*USEC_PER_MINUTE) |
609e002e | 398 | snprintf(buf, l, USEC_FMT "min %s", |
de0671ee | 399 | d / USEC_PER_MINUTE, s); |
9a98c7a1 | 400 | else if (d >= USEC_PER_MINUTE) |
609e002e | 401 | snprintf(buf, l, USEC_FMT "min " USEC_FMT "s %s", |
de0671ee ZJS |
402 | d / USEC_PER_MINUTE, |
403 | (d % USEC_PER_MINUTE) / USEC_PER_SEC, s); | |
9a98c7a1 | 404 | else if (d >= USEC_PER_SEC) |
609e002e | 405 | snprintf(buf, l, USEC_FMT "s %s", |
de0671ee | 406 | d / USEC_PER_SEC, s); |
9a98c7a1 | 407 | else if (d >= USEC_PER_MSEC) |
609e002e | 408 | snprintf(buf, l, USEC_FMT "ms %s", |
de0671ee | 409 | d / USEC_PER_MSEC, s); |
9a98c7a1 | 410 | else if (d > 0) |
de0671ee ZJS |
411 | snprintf(buf, l, USEC_FMT"us %s", |
412 | d, s); | |
9a98c7a1 LP |
413 | else |
414 | snprintf(buf, l, "now"); | |
415 | ||
416 | buf[l-1] = 0; | |
417 | return buf; | |
418 | } | |
419 | ||
2fa4092c | 420 | char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy) { |
9a98c7a1 LP |
421 | static const struct { |
422 | const char *suffix; | |
423 | usec_t usec; | |
424 | } table[] = { | |
eb55ec9f LP |
425 | { "y", USEC_PER_YEAR }, |
426 | { "month", USEC_PER_MONTH }, | |
427 | { "w", USEC_PER_WEEK }, | |
428 | { "d", USEC_PER_DAY }, | |
429 | { "h", USEC_PER_HOUR }, | |
430 | { "min", USEC_PER_MINUTE }, | |
431 | { "s", USEC_PER_SEC }, | |
432 | { "ms", USEC_PER_MSEC }, | |
433 | { "us", 1 }, | |
9a98c7a1 LP |
434 | }; |
435 | ||
da6053d0 | 436 | size_t i; |
9a98c7a1 | 437 | char *p = buf; |
2fa4092c | 438 | bool something = false; |
9a98c7a1 LP |
439 | |
440 | assert(buf); | |
441 | assert(l > 0); | |
442 | ||
bb1fada8 LP |
443 | if (t == USEC_INFINITY) { |
444 | strncpy(p, "infinity", l-1); | |
445 | p[l-1] = 0; | |
446 | return p; | |
447 | } | |
448 | ||
449 | if (t <= 0) { | |
450 | strncpy(p, "0", l-1); | |
7c537b2e LP |
451 | p[l-1] = 0; |
452 | return p; | |
453 | } | |
454 | ||
7f602784 | 455 | /* The result of this function can be parsed with parse_sec */ |
9a98c7a1 LP |
456 | |
457 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
7759ecb2 | 458 | int k = 0; |
9a98c7a1 | 459 | size_t n; |
2fa4092c LP |
460 | bool done = false; |
461 | usec_t a, b; | |
462 | ||
7c537b2e LP |
463 | if (t <= 0) |
464 | break; | |
2fa4092c | 465 | |
7c537b2e | 466 | if (t < accuracy && something) |
2fa4092c | 467 | break; |
9a98c7a1 LP |
468 | |
469 | if (t < table[i].usec) | |
470 | continue; | |
471 | ||
472 | if (l <= 1) | |
473 | break; | |
474 | ||
2fa4092c LP |
475 | a = t / table[i].usec; |
476 | b = t % table[i].usec; | |
477 | ||
478 | /* Let's see if we should shows this in dot notation */ | |
479 | if (t < USEC_PER_MINUTE && b > 0) { | |
480 | usec_t cc; | |
5fd8d5be | 481 | signed char j; |
2fa4092c LP |
482 | |
483 | j = 0; | |
484 | for (cc = table[i].usec; cc > 1; cc /= 10) | |
485 | j++; | |
486 | ||
487 | for (cc = accuracy; cc > 1; cc /= 10) { | |
488 | b /= 10; | |
489 | j--; | |
490 | } | |
491 | ||
492 | if (j > 0) { | |
493 | k = snprintf(p, l, | |
70887c5f | 494 | "%s"USEC_FMT".%0*"PRI_USEC"%s", |
2fa4092c | 495 | p > buf ? " " : "", |
de0671ee | 496 | a, |
2fa4092c | 497 | j, |
70887c5f | 498 | b, |
2fa4092c LP |
499 | table[i].suffix); |
500 | ||
501 | t = 0; | |
502 | done = true; | |
503 | } | |
504 | } | |
505 | ||
506 | /* No? Then let's show it normally */ | |
507 | if (!done) { | |
508 | k = snprintf(p, l, | |
de0671ee | 509 | "%s"USEC_FMT"%s", |
2fa4092c | 510 | p > buf ? " " : "", |
de0671ee | 511 | a, |
2fa4092c LP |
512 | table[i].suffix); |
513 | ||
514 | t = b; | |
515 | } | |
516 | ||
9a98c7a1 LP |
517 | n = MIN((size_t) k, l); |
518 | ||
519 | l -= n; | |
520 | p += n; | |
521 | ||
2fa4092c | 522 | something = true; |
9a98c7a1 LP |
523 | } |
524 | ||
525 | *p = 0; | |
526 | ||
527 | return buf; | |
528 | } | |
529 | ||
48d26c01 | 530 | static int parse_timestamp_impl(const char *t, usec_t *usec, bool with_tz) { |
92134489 LP |
531 | static const struct { |
532 | const char *name; | |
533 | const int nr; | |
534 | } day_nr[] = { | |
535 | { "Sunday", 0 }, | |
536 | { "Sun", 0 }, | |
537 | { "Monday", 1 }, | |
538 | { "Mon", 1 }, | |
539 | { "Tuesday", 2 }, | |
540 | { "Tue", 2 }, | |
541 | { "Wednesday", 3 }, | |
542 | { "Wed", 3 }, | |
543 | { "Thursday", 4 }, | |
544 | { "Thu", 4 }, | |
545 | { "Friday", 5 }, | |
546 | { "Fri", 5 }, | |
547 | { "Saturday", 6 }, | |
548 | { "Sat", 6 }, | |
549 | }; | |
550 | ||
48d26c01 | 551 | const char *k, *utc = NULL, *tzn = NULL; |
9a98c7a1 LP |
552 | struct tm tm, copy; |
553 | time_t x; | |
e4eaf99a | 554 | usec_t x_usec, plus = 0, minus = 0, ret; |
21b3a0fc | 555 | int r, weekday = -1, dst = -1; |
da6053d0 | 556 | size_t i; |
9a98c7a1 | 557 | |
947f9f01 | 558 | /* Allowed syntaxes: |
9a98c7a1 LP |
559 | * |
560 | * 2012-09-22 16:34:22 | |
561 | * 2012-09-22 16:34 (seconds will be set to 0) | |
562 | * 2012-09-22 (time will be set to 00:00:00) | |
563 | * 16:34:22 (date will be set to today) | |
564 | * 16:34 (date will be set to today, seconds to 0) | |
565 | * now | |
566 | * yesterday (time is set to 00:00:00) | |
567 | * today (time is set to 00:00:00) | |
568 | * tomorrow (time is set to 00:00:00) | |
569 | * +5min | |
570 | * -5days | |
5ba6e094 | 571 | * @2147483647 (seconds since epoch) |
9a98c7a1 LP |
572 | */ |
573 | ||
574 | assert(t); | |
9a98c7a1 | 575 | |
48d26c01 | 576 | if (t[0] == '@' && !with_tz) |
e4eaf99a | 577 | return parse_sec(t + 1, usec); |
9a98c7a1 | 578 | |
e4eaf99a | 579 | ret = now(CLOCK_REALTIME); |
9a98c7a1 | 580 | |
48d26c01 IK |
581 | if (!with_tz) { |
582 | if (streq(t, "now")) | |
583 | goto finish; | |
9a98c7a1 | 584 | |
48d26c01 IK |
585 | else if (t[0] == '+') { |
586 | r = parse_sec(t+1, &plus); | |
587 | if (r < 0) | |
588 | return r; | |
9a98c7a1 | 589 | |
48d26c01 | 590 | goto finish; |
9a98c7a1 | 591 | |
48d26c01 IK |
592 | } else if (t[0] == '-') { |
593 | r = parse_sec(t+1, &minus); | |
594 | if (r < 0) | |
595 | return r; | |
9a98c7a1 | 596 | |
48d26c01 | 597 | goto finish; |
decad910 | 598 | |
48d26c01 IK |
599 | } else if ((k = endswith(t, " ago"))) { |
600 | t = strndupa(t, k - t); | |
decad910 | 601 | |
48d26c01 IK |
602 | r = parse_sec(t, &minus); |
603 | if (r < 0) | |
604 | return r; | |
decad910 | 605 | |
48d26c01 | 606 | goto finish; |
1fcf71f5 | 607 | |
48d26c01 IK |
608 | } else if ((k = endswith(t, " left"))) { |
609 | t = strndupa(t, k - t); | |
1fcf71f5 | 610 | |
48d26c01 IK |
611 | r = parse_sec(t, &plus); |
612 | if (r < 0) | |
613 | return r; | |
1fcf71f5 | 614 | |
48d26c01 IK |
615 | goto finish; |
616 | } | |
9a98c7a1 | 617 | |
48d26c01 IK |
618 | /* See if the timestamp is suffixed with UTC */ |
619 | utc = endswith_no_case(t, " UTC"); | |
620 | if (utc) | |
621 | t = strndupa(t, utc - t); | |
622 | else { | |
623 | const char *e = NULL; | |
624 | int j; | |
21b3a0fc | 625 | |
48d26c01 | 626 | tzset(); |
21b3a0fc | 627 | |
48d26c01 | 628 | /* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note that we only |
947f9f01 YW |
629 | * support the local timezones here, nothing else. Not because we wouldn't want to, but simply because |
630 | * there are no nice APIs available to cover this. By accepting the local time zone strings, we make | |
631 | * sure that all timestamps written by format_timestamp() can be parsed correctly, even though we don't | |
632 | * support arbitrary timezone specifications. */ | |
e4eaf99a | 633 | |
48d26c01 | 634 | for (j = 0; j <= 1; j++) { |
21b3a0fc | 635 | |
48d26c01 IK |
636 | if (isempty(tzname[j])) |
637 | continue; | |
21b3a0fc | 638 | |
48d26c01 IK |
639 | e = endswith_no_case(t, tzname[j]); |
640 | if (!e) | |
641 | continue; | |
642 | if (e == t) | |
643 | continue; | |
644 | if (e[-1] != ' ') | |
645 | continue; | |
21b3a0fc | 646 | |
48d26c01 IK |
647 | break; |
648 | } | |
21b3a0fc | 649 | |
48d26c01 IK |
650 | if (IN_SET(j, 0, 1)) { |
651 | /* Found one of the two timezones specified. */ | |
652 | t = strndupa(t, e - t - 1); | |
653 | dst = j; | |
654 | tzn = tzname[j]; | |
655 | } | |
21b3a0fc LP |
656 | } |
657 | } | |
658 | ||
659 | x = (time_t) (ret / USEC_PER_SEC); | |
e4eaf99a HV |
660 | x_usec = 0; |
661 | ||
21b3a0fc LP |
662 | if (!localtime_or_gmtime_r(&x, &tm, utc)) |
663 | return -EINVAL; | |
664 | ||
2e72b794 IK |
665 | tm.tm_isdst = dst; |
666 | if (!with_tz && tzn) | |
667 | tm.tm_zone = tzn; | |
e4eaf99a HV |
668 | |
669 | if (streq(t, "today")) { | |
670 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
671 | goto from_tm; | |
672 | ||
673 | } else if (streq(t, "yesterday")) { | |
313cefa1 | 674 | tm.tm_mday--; |
e4eaf99a HV |
675 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
676 | goto from_tm; | |
677 | ||
678 | } else if (streq(t, "tomorrow")) { | |
313cefa1 | 679 | tm.tm_mday++; |
e4eaf99a HV |
680 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
681 | goto from_tm; | |
682 | } | |
683 | ||
92134489 LP |
684 | for (i = 0; i < ELEMENTSOF(day_nr); i++) { |
685 | size_t skip; | |
686 | ||
687 | if (!startswith_no_case(t, day_nr[i].name)) | |
688 | continue; | |
689 | ||
690 | skip = strlen(day_nr[i].name); | |
691 | if (t[skip] != ' ') | |
692 | continue; | |
693 | ||
694 | weekday = day_nr[i].nr; | |
695 | t += skip + 1; | |
696 | break; | |
697 | } | |
698 | ||
9a98c7a1 LP |
699 | copy = tm; |
700 | k = strptime(t, "%y-%m-%d %H:%M:%S", &tm); | |
e4eaf99a HV |
701 | if (k) { |
702 | if (*k == '.') | |
703 | goto parse_usec; | |
704 | else if (*k == 0) | |
705 | goto from_tm; | |
706 | } | |
9a98c7a1 LP |
707 | |
708 | tm = copy; | |
709 | k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm); | |
e4eaf99a HV |
710 | if (k) { |
711 | if (*k == '.') | |
712 | goto parse_usec; | |
713 | else if (*k == 0) | |
714 | goto from_tm; | |
715 | } | |
9a98c7a1 LP |
716 | |
717 | tm = copy; | |
718 | k = strptime(t, "%y-%m-%d %H:%M", &tm); | |
719 | if (k && *k == 0) { | |
720 | tm.tm_sec = 0; | |
e4eaf99a | 721 | goto from_tm; |
9a98c7a1 LP |
722 | } |
723 | ||
724 | tm = copy; | |
725 | k = strptime(t, "%Y-%m-%d %H:%M", &tm); | |
726 | if (k && *k == 0) { | |
727 | tm.tm_sec = 0; | |
e4eaf99a | 728 | goto from_tm; |
9a98c7a1 LP |
729 | } |
730 | ||
731 | tm = copy; | |
732 | k = strptime(t, "%y-%m-%d", &tm); | |
733 | if (k && *k == 0) { | |
734 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
e4eaf99a | 735 | goto from_tm; |
9a98c7a1 LP |
736 | } |
737 | ||
738 | tm = copy; | |
739 | k = strptime(t, "%Y-%m-%d", &tm); | |
740 | if (k && *k == 0) { | |
741 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
e4eaf99a | 742 | goto from_tm; |
9a98c7a1 LP |
743 | } |
744 | ||
745 | tm = copy; | |
746 | k = strptime(t, "%H:%M:%S", &tm); | |
e4eaf99a HV |
747 | if (k) { |
748 | if (*k == '.') | |
749 | goto parse_usec; | |
750 | else if (*k == 0) | |
751 | goto from_tm; | |
752 | } | |
9a98c7a1 LP |
753 | |
754 | tm = copy; | |
755 | k = strptime(t, "%H:%M", &tm); | |
756 | if (k && *k == 0) { | |
757 | tm.tm_sec = 0; | |
e4eaf99a | 758 | goto from_tm; |
9a98c7a1 LP |
759 | } |
760 | ||
761 | return -EINVAL; | |
762 | ||
e4eaf99a HV |
763 | parse_usec: |
764 | { | |
436dd70f | 765 | unsigned add; |
e4eaf99a HV |
766 | |
767 | k++; | |
436dd70f HV |
768 | r = parse_fractional_part_u(&k, 6, &add); |
769 | if (r < 0) | |
e4eaf99a HV |
770 | return -EINVAL; |
771 | ||
436dd70f | 772 | if (*k) |
e4eaf99a HV |
773 | return -EINVAL; |
774 | ||
436dd70f | 775 | x_usec = add; |
e4eaf99a HV |
776 | } |
777 | ||
778 | from_tm: | |
214cc95d | 779 | if (weekday >= 0 && tm.tm_wday != weekday) |
68bdd2d2 | 780 | return -EINVAL; |
9a98c7a1 | 781 | |
214cc95d MH |
782 | x = mktime_or_timegm(&tm, utc); |
783 | if (x < 0) | |
92134489 LP |
784 | return -EINVAL; |
785 | ||
68bdd2d2 | 786 | ret = (usec_t) x * USEC_PER_SEC + x_usec; |
1bb4b028 LP |
787 | if (ret > USEC_TIMESTAMP_FORMATTABLE_MAX) |
788 | return -EINVAL; | |
9a98c7a1 | 789 | |
e4eaf99a | 790 | finish: |
315782db | 791 | if (ret + plus < ret) /* overflow? */ |
68bdd2d2 | 792 | return -EINVAL; |
9a98c7a1 | 793 | ret += plus; |
1bb4b028 LP |
794 | if (ret > USEC_TIMESTAMP_FORMATTABLE_MAX) |
795 | return -EINVAL; | |
796 | ||
68bdd2d2 | 797 | if (ret >= minus) |
9a98c7a1 LP |
798 | ret -= minus; |
799 | else | |
68bdd2d2 | 800 | return -EINVAL; |
9a98c7a1 | 801 | |
a6a67f71 ZJS |
802 | if (usec) |
803 | *usec = ret; | |
9a98c7a1 LP |
804 | return 0; |
805 | } | |
806 | ||
48d26c01 IK |
807 | typedef struct ParseTimestampResult { |
808 | usec_t usec; | |
809 | int return_value; | |
810 | } ParseTimestampResult; | |
811 | ||
812 | int parse_timestamp(const char *t, usec_t *usec) { | |
ff69484a | 813 | char *last_space, *tz = NULL; |
48d26c01 | 814 | ParseTimestampResult *shared, tmp; |
4c253ed1 | 815 | int r; |
48d26c01 IK |
816 | |
817 | last_space = strrchr(t, ' '); | |
089fb865 | 818 | if (last_space != NULL && timezone_is_valid(last_space + 1, LOG_DEBUG)) |
ff69484a | 819 | tz = last_space + 1; |
48d26c01 | 820 | |
234519ae | 821 | if (!tz || endswith_no_case(t, " UTC")) |
48d26c01 IK |
822 | return parse_timestamp_impl(t, usec, false); |
823 | ||
48d26c01 IK |
824 | shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0); |
825 | if (shared == MAP_FAILED) | |
826 | return negative_errno(); | |
827 | ||
1f5d1e02 | 828 | r = safe_fork("(sd-timestamp)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT, NULL); |
4c253ed1 | 829 | if (r < 0) { |
48d26c01 | 830 | (void) munmap(shared, sizeof *shared); |
4c253ed1 | 831 | return r; |
48d26c01 | 832 | } |
4c253ed1 | 833 | if (r == 0) { |
3fd4929b MH |
834 | bool with_tz = true; |
835 | ||
ff69484a | 836 | if (setenv("TZ", tz, 1) != 0) { |
48d26c01 IK |
837 | shared->return_value = negative_errno(); |
838 | _exit(EXIT_FAILURE); | |
839 | } | |
840 | ||
841 | tzset(); | |
842 | ||
3fd4929b | 843 | /* If there is a timezone that matches the tzname fields, leave the parsing to the implementation. |
947f9f01 | 844 | * Otherwise just cut it off. */ |
3fd4929b MH |
845 | with_tz = !STR_IN_SET(tz, tzname[0], tzname[1]); |
846 | ||
f21f31b2 | 847 | /* Cut off the timezone if we don't need it. */ |
3fd4929b MH |
848 | if (with_tz) |
849 | t = strndupa(t, last_space - t); | |
850 | ||
851 | shared->return_value = parse_timestamp_impl(t, &shared->usec, with_tz); | |
48d26c01 IK |
852 | |
853 | _exit(EXIT_SUCCESS); | |
854 | } | |
855 | ||
48d26c01 IK |
856 | tmp = *shared; |
857 | if (munmap(shared, sizeof *shared) != 0) | |
858 | return negative_errno(); | |
859 | ||
a6a67f71 | 860 | if (tmp.return_value == 0 && usec) |
48d26c01 IK |
861 | *usec = tmp.usec; |
862 | ||
863 | return tmp.return_value; | |
864 | } | |
865 | ||
ed2e7967 | 866 | static const char* extract_multiplier(const char *p, usec_t *multiplier) { |
9a98c7a1 LP |
867 | static const struct { |
868 | const char *suffix; | |
869 | usec_t usec; | |
870 | } table[] = { | |
eb55ec9f LP |
871 | { "seconds", USEC_PER_SEC }, |
872 | { "second", USEC_PER_SEC }, | |
873 | { "sec", USEC_PER_SEC }, | |
874 | { "s", USEC_PER_SEC }, | |
9a98c7a1 | 875 | { "minutes", USEC_PER_MINUTE }, |
eb55ec9f LP |
876 | { "minute", USEC_PER_MINUTE }, |
877 | { "min", USEC_PER_MINUTE }, | |
878 | { "months", USEC_PER_MONTH }, | |
879 | { "month", USEC_PER_MONTH }, | |
880 | { "M", USEC_PER_MONTH }, | |
881 | { "msec", USEC_PER_MSEC }, | |
882 | { "ms", USEC_PER_MSEC }, | |
883 | { "m", USEC_PER_MINUTE }, | |
884 | { "hours", USEC_PER_HOUR }, | |
885 | { "hour", USEC_PER_HOUR }, | |
886 | { "hr", USEC_PER_HOUR }, | |
887 | { "h", USEC_PER_HOUR }, | |
888 | { "days", USEC_PER_DAY }, | |
889 | { "day", USEC_PER_DAY }, | |
890 | { "d", USEC_PER_DAY }, | |
891 | { "weeks", USEC_PER_WEEK }, | |
892 | { "week", USEC_PER_WEEK }, | |
893 | { "w", USEC_PER_WEEK }, | |
894 | { "years", USEC_PER_YEAR }, | |
895 | { "year", USEC_PER_YEAR }, | |
896 | { "y", USEC_PER_YEAR }, | |
897 | { "usec", 1ULL }, | |
898 | { "us", 1ULL }, | |
5efdbf11 | 899 | { "µs", 1ULL }, |
9a98c7a1 | 900 | }; |
da6053d0 | 901 | size_t i; |
240a7ba9 ZJS |
902 | |
903 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
904 | char *e; | |
905 | ||
906 | e = startswith(p, table[i].suffix); | |
907 | if (e) { | |
908 | *multiplier = table[i].usec; | |
909 | return e; | |
910 | } | |
911 | } | |
9a98c7a1 | 912 | |
240a7ba9 ZJS |
913 | return p; |
914 | } | |
915 | ||
916 | int parse_time(const char *t, usec_t *usec, usec_t default_unit) { | |
b1d6dcf5 | 917 | const char *p, *s; |
9a98c7a1 | 918 | usec_t r = 0; |
cb0dac05 | 919 | bool something = false; |
9a98c7a1 LP |
920 | |
921 | assert(t); | |
519cffec | 922 | assert(default_unit > 0); |
9a98c7a1 LP |
923 | |
924 | p = t; | |
b1d6dcf5 ZJS |
925 | |
926 | p += strspn(p, WHITESPACE); | |
927 | s = startswith(p, "infinity"); | |
928 | if (s) { | |
929 | s += strspn(s, WHITESPACE); | |
930 | if (*s != 0) | |
931 | return -EINVAL; | |
932 | ||
a6a67f71 ZJS |
933 | if (usec) |
934 | *usec = USEC_INFINITY; | |
b1d6dcf5 ZJS |
935 | return 0; |
936 | } | |
937 | ||
cb0dac05 | 938 | for (;;) { |
5a9fb358 | 939 | usec_t multiplier = default_unit, k; |
ed2e7967 | 940 | long long l; |
5a9fb358 | 941 | char *e; |
cb0dac05 LP |
942 | |
943 | p += strspn(p, WHITESPACE); | |
944 | ||
945 | if (*p == 0) { | |
946 | if (!something) | |
947 | return -EINVAL; | |
948 | ||
949 | break; | |
950 | } | |
9a98c7a1 | 951 | |
5a9fb358 LP |
952 | if (*p == '-') /* Don't allow "-0" */ |
953 | return -ERANGE; | |
954 | ||
9a98c7a1 LP |
955 | errno = 0; |
956 | l = strtoll(p, &e, 10); | |
8333c77e | 957 | if (errno > 0) |
9a98c7a1 | 958 | return -errno; |
9a98c7a1 LP |
959 | if (l < 0) |
960 | return -ERANGE; | |
961 | ||
cb0dac05 | 962 | if (*e == '.') { |
ed2e7967 YW |
963 | p = e + 1; |
964 | p += strspn(p, DIGITS); | |
cb0dac05 | 965 | } else if (e == p) |
9a98c7a1 | 966 | return -EINVAL; |
ed2e7967 YW |
967 | else |
968 | p = e; | |
9a98c7a1 | 969 | |
ed2e7967 YW |
970 | s = extract_multiplier(p + strspn(p, WHITESPACE), &multiplier); |
971 | if (s == p && *s != '\0') | |
972 | /* Don't allow '12.34.56', but accept '12.34 .56' or '12.34s.56'*/ | |
973 | return -EINVAL; | |
9a98c7a1 | 974 | |
ed2e7967 | 975 | p = s; |
519cffec | 976 | |
ed2e7967 YW |
977 | if ((usec_t) l >= USEC_INFINITY / multiplier) |
978 | return -ERANGE; | |
8079c903 | 979 | |
ed2e7967 YW |
980 | k = (usec_t) l * multiplier; |
981 | if (k >= USEC_INFINITY - r) | |
8079c903 YW |
982 | return -ERANGE; |
983 | ||
ed2e7967 | 984 | r += k; |
519cffec | 985 | |
ed2e7967 | 986 | something = true; |
519cffec | 987 | |
ed2e7967 YW |
988 | if (*e == '.') { |
989 | usec_t m = multiplier / 10; | |
990 | const char *b; | |
8079c903 | 991 | |
ed2e7967 YW |
992 | for (b = e + 1; *b >= '0' && *b <= '9'; b++, m /= 10) { |
993 | k = (usec_t) (*b - '0') * m; | |
994 | if (k >= USEC_INFINITY - r) | |
995 | return -ERANGE; | |
996 | ||
997 | r += k; | |
998 | } | |
999 | ||
1000 | /* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge"*/ | |
1001 | if (b == e + 1) | |
1002 | return -EINVAL; | |
1003 | } | |
cb0dac05 | 1004 | } |
9a98c7a1 | 1005 | |
a6a67f71 ZJS |
1006 | if (usec) |
1007 | *usec = r; | |
9a98c7a1 LP |
1008 | return 0; |
1009 | } | |
1010 | ||
519cffec LP |
1011 | int parse_sec(const char *t, usec_t *usec) { |
1012 | return parse_time(t, usec, USEC_PER_SEC); | |
1013 | } | |
1014 | ||
def34f63 LP |
1015 | int parse_sec_fix_0(const char *t, usec_t *ret) { |
1016 | usec_t k; | |
1017 | int r; | |
eae51da3 | 1018 | |
def34f63 LP |
1019 | assert(t); |
1020 | assert(ret); | |
eae51da3 | 1021 | |
def34f63 LP |
1022 | r = parse_sec(t, &k); |
1023 | if (r < 0) | |
1024 | return r; | |
0004f698 | 1025 | |
def34f63 LP |
1026 | *ret = k == 0 ? USEC_INFINITY : k; |
1027 | return r; | |
0004f698 ZJS |
1028 | } |
1029 | ||
7b61ce3c FB |
1030 | int parse_sec_def_infinity(const char *t, usec_t *ret) { |
1031 | t += strspn(t, WHITESPACE); | |
1032 | if (isempty(t)) { | |
1033 | *ret = USEC_INFINITY; | |
1034 | return 0; | |
1035 | } | |
1036 | return parse_sec(t, ret); | |
1037 | } | |
1038 | ||
ed2e7967 | 1039 | static const char* extract_nsec_multiplier(const char *p, nsec_t *multiplier) { |
9a98c7a1 LP |
1040 | static const struct { |
1041 | const char *suffix; | |
1042 | nsec_t nsec; | |
1043 | } table[] = { | |
ed2e7967 YW |
1044 | { "seconds", NSEC_PER_SEC }, |
1045 | { "second", NSEC_PER_SEC }, | |
1046 | { "sec", NSEC_PER_SEC }, | |
1047 | { "s", NSEC_PER_SEC }, | |
9a98c7a1 | 1048 | { "minutes", NSEC_PER_MINUTE }, |
ed2e7967 YW |
1049 | { "minute", NSEC_PER_MINUTE }, |
1050 | { "min", NSEC_PER_MINUTE }, | |
1051 | { "months", NSEC_PER_MONTH }, | |
1052 | { "month", NSEC_PER_MONTH }, | |
1053 | { "M", NSEC_PER_MONTH }, | |
1054 | { "msec", NSEC_PER_MSEC }, | |
1055 | { "ms", NSEC_PER_MSEC }, | |
1056 | { "m", NSEC_PER_MINUTE }, | |
1057 | { "hours", NSEC_PER_HOUR }, | |
1058 | { "hour", NSEC_PER_HOUR }, | |
1059 | { "hr", NSEC_PER_HOUR }, | |
1060 | { "h", NSEC_PER_HOUR }, | |
1061 | { "days", NSEC_PER_DAY }, | |
1062 | { "day", NSEC_PER_DAY }, | |
1063 | { "d", NSEC_PER_DAY }, | |
1064 | { "weeks", NSEC_PER_WEEK }, | |
1065 | { "week", NSEC_PER_WEEK }, | |
1066 | { "w", NSEC_PER_WEEK }, | |
1067 | { "years", NSEC_PER_YEAR }, | |
1068 | { "year", NSEC_PER_YEAR }, | |
1069 | { "y", NSEC_PER_YEAR }, | |
1070 | { "usec", NSEC_PER_USEC }, | |
1071 | { "us", NSEC_PER_USEC }, | |
1072 | { "µs", NSEC_PER_USEC }, | |
1073 | { "nsec", 1ULL }, | |
1074 | { "ns", 1ULL }, | |
1075 | { "", 1ULL }, /* default is nsec */ | |
9a98c7a1 | 1076 | }; |
ed2e7967 YW |
1077 | size_t i; |
1078 | ||
1079 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1080 | char *e; | |
1081 | ||
1082 | e = startswith(p, table[i].suffix); | |
1083 | if (e) { | |
1084 | *multiplier = table[i].nsec; | |
1085 | return e; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | return p; | |
1090 | } | |
9a98c7a1 | 1091 | |
ed2e7967 | 1092 | int parse_nsec(const char *t, nsec_t *nsec) { |
e73c78c2 | 1093 | const char *p, *s; |
9a98c7a1 | 1094 | nsec_t r = 0; |
cb0dac05 | 1095 | bool something = false; |
9a98c7a1 LP |
1096 | |
1097 | assert(t); | |
1098 | assert(nsec); | |
1099 | ||
1100 | p = t; | |
e73c78c2 LP |
1101 | |
1102 | p += strspn(p, WHITESPACE); | |
1103 | s = startswith(p, "infinity"); | |
1104 | if (s) { | |
1105 | s += strspn(s, WHITESPACE); | |
8e8933ca | 1106 | if (*s != 0) |
e73c78c2 LP |
1107 | return -EINVAL; |
1108 | ||
1109 | *nsec = NSEC_INFINITY; | |
1110 | return 0; | |
1111 | } | |
1112 | ||
cb0dac05 | 1113 | for (;;) { |
ed2e7967 YW |
1114 | nsec_t multiplier = 1, k; |
1115 | long long l; | |
9a98c7a1 | 1116 | char *e; |
cb0dac05 LP |
1117 | |
1118 | p += strspn(p, WHITESPACE); | |
1119 | ||
1120 | if (*p == 0) { | |
1121 | if (!something) | |
1122 | return -EINVAL; | |
1123 | ||
1124 | break; | |
1125 | } | |
9a98c7a1 | 1126 | |
ed2e7967 | 1127 | if (*p == '-') /* Don't allow "-0" */ |
5a9fb358 LP |
1128 | return -ERANGE; |
1129 | ||
9a98c7a1 LP |
1130 | errno = 0; |
1131 | l = strtoll(p, &e, 10); | |
8333c77e | 1132 | if (errno > 0) |
9a98c7a1 | 1133 | return -errno; |
9a98c7a1 LP |
1134 | if (l < 0) |
1135 | return -ERANGE; | |
1136 | ||
cb0dac05 | 1137 | if (*e == '.') { |
ed2e7967 YW |
1138 | p = e + 1; |
1139 | p += strspn(p, DIGITS); | |
cb0dac05 | 1140 | } else if (e == p) |
9a98c7a1 | 1141 | return -EINVAL; |
ed2e7967 YW |
1142 | else |
1143 | p = e; | |
9a98c7a1 | 1144 | |
ed2e7967 YW |
1145 | s = extract_nsec_multiplier(p + strspn(p, WHITESPACE), &multiplier); |
1146 | if (s == p && *s != '\0') | |
1147 | /* Don't allow '12.34.56', but accept '12.34 .56' or '12.34s.56'*/ | |
1148 | return -EINVAL; | |
9a98c7a1 | 1149 | |
ed2e7967 | 1150 | p = s; |
f6a178e9 | 1151 | |
ed2e7967 YW |
1152 | if ((nsec_t) l >= NSEC_INFINITY / multiplier) |
1153 | return -ERANGE; | |
1154 | ||
1155 | k = (nsec_t) l * multiplier; | |
1156 | if (k >= NSEC_INFINITY - r) | |
1157 | return -ERANGE; | |
f6a178e9 | 1158 | |
ed2e7967 YW |
1159 | r += k; |
1160 | ||
1161 | something = true; | |
cb0dac05 | 1162 | |
ed2e7967 YW |
1163 | if (*e == '.') { |
1164 | nsec_t m = multiplier / 10; | |
1165 | const char *b; | |
cb0dac05 | 1166 | |
ed2e7967 YW |
1167 | for (b = e + 1; *b >= '0' && *b <= '9'; b++, m /= 10) { |
1168 | k = (nsec_t) (*b - '0') * m; | |
1169 | if (k >= NSEC_INFINITY - r) | |
f6a178e9 YW |
1170 | return -ERANGE; |
1171 | ||
1172 | r += k; | |
9a98c7a1 LP |
1173 | } |
1174 | ||
ed2e7967 YW |
1175 | /* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge"*/ |
1176 | if (b == e + 1) | |
1177 | return -EINVAL; | |
1178 | } | |
cb0dac05 | 1179 | } |
9a98c7a1 LP |
1180 | |
1181 | *nsec = r; | |
1182 | ||
1183 | return 0; | |
1184 | } | |
03cc26dd LP |
1185 | |
1186 | bool ntp_synced(void) { | |
1187 | struct timex txc = {}; | |
1188 | ||
1189 | if (adjtimex(&txc) < 0) | |
1190 | return false; | |
1191 | ||
bca5a0ea ML |
1192 | /* Consider the system clock synchronized if the reported maximum error is smaller than the maximum |
1193 | * value (16 seconds). Ignore the STA_UNSYNC flag as it may have been set to prevent the kernel from | |
1194 | * touching the RTC. */ | |
1195 | if (txc.maxerror >= 16000000) | |
03cc26dd LP |
1196 | return false; |
1197 | ||
1198 | return true; | |
1199 | } | |
75683450 LP |
1200 | |
1201 | int get_timezones(char ***ret) { | |
1202 | _cleanup_fclose_ FILE *f = NULL; | |
1203 | _cleanup_strv_free_ char **zones = NULL; | |
1204 | size_t n_zones = 0, n_allocated = 0; | |
8d2b9d14 | 1205 | int r; |
75683450 LP |
1206 | |
1207 | assert(ret); | |
1208 | ||
bea1a013 | 1209 | zones = strv_new("UTC"); |
75683450 LP |
1210 | if (!zones) |
1211 | return -ENOMEM; | |
1212 | ||
1213 | n_allocated = 2; | |
1214 | n_zones = 1; | |
1215 | ||
ba32084f | 1216 | f = fopen("/usr/share/zoneinfo/zone1970.tab", "re"); |
75683450 | 1217 | if (f) { |
8d2b9d14 LP |
1218 | for (;;) { |
1219 | _cleanup_free_ char *line = NULL; | |
75683450 LP |
1220 | char *p, *w; |
1221 | size_t k; | |
1222 | ||
8d2b9d14 LP |
1223 | r = read_line(f, LONG_LINE_MAX, &line); |
1224 | if (r < 0) | |
1225 | return r; | |
1226 | if (r == 0) | |
1227 | break; | |
1228 | ||
1229 | p = strstrip(line); | |
75683450 LP |
1230 | |
1231 | if (isempty(p) || *p == '#') | |
1232 | continue; | |
1233 | ||
1234 | /* Skip over country code */ | |
1235 | p += strcspn(p, WHITESPACE); | |
1236 | p += strspn(p, WHITESPACE); | |
1237 | ||
1238 | /* Skip over coordinates */ | |
1239 | p += strcspn(p, WHITESPACE); | |
1240 | p += strspn(p, WHITESPACE); | |
1241 | ||
1242 | /* Found timezone name */ | |
1243 | k = strcspn(p, WHITESPACE); | |
1244 | if (k <= 0) | |
1245 | continue; | |
1246 | ||
1247 | w = strndup(p, k); | |
1248 | if (!w) | |
1249 | return -ENOMEM; | |
1250 | ||
1251 | if (!GREEDY_REALLOC(zones, n_allocated, n_zones + 2)) { | |
1252 | free(w); | |
1253 | return -ENOMEM; | |
1254 | } | |
1255 | ||
1256 | zones[n_zones++] = w; | |
1257 | zones[n_zones] = NULL; | |
1258 | } | |
1259 | ||
1260 | strv_sort(zones); | |
1261 | ||
1262 | } else if (errno != ENOENT) | |
1263 | return -errno; | |
1264 | ||
1cc6c93a | 1265 | *ret = TAKE_PTR(zones); |
75683450 LP |
1266 | |
1267 | return 0; | |
1268 | } | |
1269 | ||
089fb865 | 1270 | bool timezone_is_valid(const char *name, int log_level) { |
75683450 LP |
1271 | bool slash = false; |
1272 | const char *p, *t; | |
a2932d51 MG |
1273 | _cleanup_close_ int fd = -1; |
1274 | char buf[4]; | |
1275 | int r; | |
75683450 | 1276 | |
5c904ba5 LP |
1277 | if (isempty(name)) |
1278 | return false; | |
1279 | ||
1280 | if (name[0] == '/') | |
75683450 LP |
1281 | return false; |
1282 | ||
1283 | for (p = name; *p; p++) { | |
1284 | if (!(*p >= '0' && *p <= '9') && | |
1285 | !(*p >= 'a' && *p <= 'z') && | |
1286 | !(*p >= 'A' && *p <= 'Z') && | |
4c701096 | 1287 | !IN_SET(*p, '-', '_', '+', '/')) |
75683450 LP |
1288 | return false; |
1289 | ||
1290 | if (*p == '/') { | |
1291 | ||
1292 | if (slash) | |
1293 | return false; | |
1294 | ||
1295 | slash = true; | |
1296 | } else | |
1297 | slash = false; | |
1298 | } | |
1299 | ||
1300 | if (slash) | |
1301 | return false; | |
1302 | ||
1c73b60b YW |
1303 | if (p - name >= PATH_MAX) |
1304 | return false; | |
1305 | ||
63c372cb | 1306 | t = strjoina("/usr/share/zoneinfo/", name); |
a2932d51 MG |
1307 | |
1308 | fd = open(t, O_RDONLY|O_CLOEXEC); | |
1309 | if (fd < 0) { | |
089fb865 | 1310 | log_full_errno(log_level, errno, "Failed to open timezone file '%s': %m", t); |
a2932d51 MG |
1311 | return false; |
1312 | } | |
1313 | ||
1314 | r = fd_verify_regular(fd); | |
1315 | if (r < 0) { | |
089fb865 | 1316 | log_full_errno(log_level, r, "Timezone file '%s' is not a regular file: %m", t); |
75683450 | 1317 | return false; |
a2932d51 MG |
1318 | } |
1319 | ||
1320 | r = loop_read_exact(fd, buf, 4, false); | |
1321 | if (r < 0) { | |
089fb865 | 1322 | log_full_errno(log_level, r, "Failed to read from timezone file '%s': %m", t); |
a2932d51 MG |
1323 | return false; |
1324 | } | |
75683450 | 1325 | |
a2932d51 MG |
1326 | /* Magic from tzfile(5) */ |
1327 | if (memcmp(buf, "TZif", 4) != 0) { | |
089fb865 | 1328 | log_full(log_level, "Timezone file '%s' has wrong magic bytes", t); |
75683450 | 1329 | return false; |
a2932d51 | 1330 | } |
75683450 LP |
1331 | |
1332 | return true; | |
1333 | } | |
77ff2de9 | 1334 | |
3411372e LP |
1335 | bool clock_boottime_supported(void) { |
1336 | static int supported = -1; | |
1337 | ||
1338 | /* Note that this checks whether CLOCK_BOOTTIME is available in general as well as available for timerfds()! */ | |
1339 | ||
1340 | if (supported < 0) { | |
1341 | int fd; | |
1342 | ||
1343 | fd = timerfd_create(CLOCK_BOOTTIME, TFD_NONBLOCK|TFD_CLOEXEC); | |
1344 | if (fd < 0) | |
1345 | supported = false; | |
1346 | else { | |
1347 | safe_close(fd); | |
1348 | supported = true; | |
1349 | } | |
77ff2de9 TG |
1350 | } |
1351 | ||
3411372e LP |
1352 | return supported; |
1353 | } | |
1354 | ||
1355 | clockid_t clock_boottime_or_monotonic(void) { | |
1356 | if (clock_boottime_supported()) | |
1357 | return CLOCK_BOOTTIME; | |
1358 | else | |
1359 | return CLOCK_MONOTONIC; | |
77ff2de9 | 1360 | } |
5c904ba5 | 1361 | |
fe624c4c LP |
1362 | bool clock_supported(clockid_t clock) { |
1363 | struct timespec ts; | |
1364 | ||
1365 | switch (clock) { | |
1366 | ||
1367 | case CLOCK_MONOTONIC: | |
1368 | case CLOCK_REALTIME: | |
1369 | return true; | |
1370 | ||
1371 | case CLOCK_BOOTTIME: | |
1372 | return clock_boottime_supported(); | |
1373 | ||
1374 | case CLOCK_BOOTTIME_ALARM: | |
1375 | if (!clock_boottime_supported()) | |
1376 | return false; | |
1377 | ||
4831981d | 1378 | _fallthrough_; |
fe624c4c LP |
1379 | default: |
1380 | /* For everything else, check properly */ | |
1381 | return clock_gettime(clock, &ts) >= 0; | |
1382 | } | |
1383 | } | |
1384 | ||
64d6c229 | 1385 | int get_timezone(char **tz) { |
5c904ba5 LP |
1386 | _cleanup_free_ char *t = NULL; |
1387 | const char *e; | |
1388 | char *z; | |
1389 | int r; | |
1390 | ||
1391 | r = readlink_malloc("/etc/localtime", &t); | |
1392 | if (r < 0) | |
1393 | return r; /* returns EINVAL if not a symlink */ | |
1394 | ||
da9fc98d | 1395 | e = PATH_STARTSWITH_SET(t, "/usr/share/zoneinfo/", "../usr/share/zoneinfo/"); |
5c904ba5 LP |
1396 | if (!e) |
1397 | return -EINVAL; | |
1398 | ||
089fb865 | 1399 | if (!timezone_is_valid(e, LOG_DEBUG)) |
5c904ba5 LP |
1400 | return -EINVAL; |
1401 | ||
1402 | z = strdup(e); | |
1403 | if (!z) | |
1404 | return -ENOMEM; | |
1405 | ||
64d6c229 | 1406 | *tz = z; |
5c904ba5 LP |
1407 | return 0; |
1408 | } | |
7c67c79c HV |
1409 | |
1410 | time_t mktime_or_timegm(struct tm *tm, bool utc) { | |
1411 | return utc ? timegm(tm) : mktime(tm); | |
1412 | } | |
1413 | ||
1414 | struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc) { | |
1415 | return utc ? gmtime_r(t, tm) : localtime_r(t, tm); | |
1416 | } | |
87b8ce69 | 1417 | |
77372afb YW |
1418 | static uint32_t sysconf_clock_ticks_cached(void) { |
1419 | static thread_local uint32_t hz = 0; | |
87b8ce69 SS |
1420 | long r; |
1421 | ||
1422 | if (hz == 0) { | |
1423 | r = sysconf(_SC_CLK_TCK); | |
1424 | ||
1425 | assert(r > 0); | |
70887c5f | 1426 | hz = r; |
87b8ce69 SS |
1427 | } |
1428 | ||
77372afb YW |
1429 | return hz; |
1430 | } | |
1431 | ||
1432 | uint32_t usec_to_jiffies(usec_t u) { | |
1433 | uint32_t hz = sysconf_clock_ticks_cached(); | |
1434 | return DIV_ROUND_UP(u, USEC_PER_SEC / hz); | |
1435 | } | |
1436 | ||
1437 | usec_t jiffies_to_usec(uint32_t j) { | |
1438 | uint32_t hz = sysconf_clock_ticks_cached(); | |
1439 | return DIV_ROUND_UP(j * USEC_PER_SEC, hz); | |
87b8ce69 | 1440 | } |
1007ec60 LP |
1441 | |
1442 | usec_t usec_shift_clock(usec_t x, clockid_t from, clockid_t to) { | |
1443 | usec_t a, b; | |
1444 | ||
1445 | if (x == USEC_INFINITY) | |
1446 | return USEC_INFINITY; | |
1447 | if (map_clock_id(from) == map_clock_id(to)) | |
1448 | return x; | |
1449 | ||
1450 | a = now(from); | |
1451 | b = now(to); | |
1452 | ||
1453 | if (x > a) | |
1454 | /* x lies in the future */ | |
1455 | return usec_add(b, usec_sub_unsigned(x, a)); | |
1456 | else | |
1457 | /* x lies in the past */ | |
1458 | return usec_sub_unsigned(b, usec_sub_unsigned(a, x)); | |
1459 | } | |
9a9a4f10 LP |
1460 | |
1461 | bool in_utc_timezone(void) { | |
1462 | tzset(); | |
1463 | ||
1464 | return timezone == 0 && daylight == 0; | |
1465 | } | |
4f811d27 LP |
1466 | |
1467 | int time_change_fd(void) { | |
1468 | ||
1469 | /* We only care for the cancellation event, hence we set the timeout to the latest possible value. */ | |
1470 | static const struct itimerspec its = { | |
1471 | .it_value.tv_sec = TIME_T_MAX, | |
1472 | }; | |
1473 | ||
1474 | _cleanup_close_ int fd; | |
1475 | ||
1476 | assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX)); | |
1477 | ||
1478 | /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever CLOCK_REALTIME makes a jump relative to | |
1479 | * CLOCK_MONOTONIC. */ | |
1480 | ||
1481 | fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC); | |
1482 | if (fd < 0) | |
1483 | return -errno; | |
1484 | ||
1485 | if (timerfd_settime(fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) | |
1486 | return -errno; | |
1487 | ||
1488 | return TAKE_FD(fd); | |
1489 | } |