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