| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/time.h> |
| #include <sys/timerfd.h> |
| #include <sys/timex.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "fs-util.h" |
| #include "log.h" |
| #include "macro.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "time-util.h" |
| |
| static nsec_t timespec_load_nsec(const struct timespec *ts); |
| |
| static clockid_t map_clock_id(clockid_t c) { |
| |
| /* Some more exotic archs (s390, ppc, …) lack the "ALARM" flavour of the clocks. Thus, clock_gettime() will |
| * fail for them. Since they are essentially the same as their non-ALARM pendants (their only difference is |
| * when timers are set on them), let's just map them accordingly. This way, we can get the correct time even on |
| * those archs. */ |
| |
| switch (c) { |
| |
| case CLOCK_BOOTTIME_ALARM: |
| return CLOCK_BOOTTIME; |
| |
| case CLOCK_REALTIME_ALARM: |
| return CLOCK_REALTIME; |
| |
| default: |
| return c; |
| } |
| } |
| |
| usec_t now(clockid_t clock_id) { |
| struct timespec ts; |
| |
| assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0); |
| |
| return timespec_load(&ts); |
| } |
| |
| nsec_t now_nsec(clockid_t clock_id) { |
| struct timespec ts; |
| |
| assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0); |
| |
| return timespec_load_nsec(&ts); |
| } |
| |
| dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
| assert(ts); |
| |
| ts->realtime = now(CLOCK_REALTIME); |
| ts->monotonic = now(CLOCK_MONOTONIC); |
| |
| return ts; |
| } |
| |
| triple_timestamp* triple_timestamp_get(triple_timestamp *ts) { |
| assert(ts); |
| |
| ts->realtime = now(CLOCK_REALTIME); |
| ts->monotonic = now(CLOCK_MONOTONIC); |
| ts->boottime = clock_boottime_supported() ? now(CLOCK_BOOTTIME) : USEC_INFINITY; |
| |
| return ts; |
| } |
| |
| dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
| int64_t delta; |
| assert(ts); |
| |
| if (u == USEC_INFINITY || u <= 0) { |
| ts->realtime = ts->monotonic = u; |
| return ts; |
| } |
| |
| ts->realtime = u; |
| |
| delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; |
| ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta); |
| |
| return ts; |
| } |
| |
| triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) { |
| int64_t delta; |
| |
| assert(ts); |
| |
| if (u == USEC_INFINITY || u <= 0) { |
| ts->realtime = ts->monotonic = ts->boottime = u; |
| return ts; |
| } |
| |
| ts->realtime = u; |
| delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; |
| ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta); |
| ts->boottime = clock_boottime_supported() ? usec_sub(now(CLOCK_BOOTTIME), delta) : USEC_INFINITY; |
| |
| return ts; |
| } |
| |
| dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) { |
| int64_t delta; |
| assert(ts); |
| |
| if (u == USEC_INFINITY) { |
| ts->realtime = ts->monotonic = USEC_INFINITY; |
| return ts; |
| } |
| |
| ts->monotonic = u; |
| delta = (int64_t) now(CLOCK_MONOTONIC) - (int64_t) u; |
| ts->realtime = usec_sub(now(CLOCK_REALTIME), delta); |
| |
| return ts; |
| } |
| |
| dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u) { |
| int64_t delta; |
| |
| if (u == USEC_INFINITY) { |
| ts->realtime = ts->monotonic = USEC_INFINITY; |
| return ts; |
| } |
| |
| dual_timestamp_get(ts); |
| delta = (int64_t) now(clock_boottime_or_monotonic()) - (int64_t) u; |
| ts->realtime = usec_sub(ts->realtime, delta); |
| ts->monotonic = usec_sub(ts->monotonic, delta); |
| |
| return ts; |
| } |
| |
| usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) { |
| |
| switch (clock) { |
| |
| case CLOCK_REALTIME: |
| case CLOCK_REALTIME_ALARM: |
| return ts->realtime; |
| |
| case CLOCK_MONOTONIC: |
| return ts->monotonic; |
| |
| case CLOCK_BOOTTIME: |
| case CLOCK_BOOTTIME_ALARM: |
| return ts->boottime; |
| |
| default: |
| return USEC_INFINITY; |
| } |
| } |
| |
| usec_t timespec_load(const struct timespec *ts) { |
| assert(ts); |
| |
| if (ts->tv_sec == (time_t) -1 && ts->tv_nsec == (long) -1) |
| return USEC_INFINITY; |
| |
| if ((usec_t) ts->tv_sec > (UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / USEC_PER_SEC) |
| return USEC_INFINITY; |
| |
| return |
| (usec_t) ts->tv_sec * USEC_PER_SEC + |
| (usec_t) ts->tv_nsec / NSEC_PER_USEC; |
| } |
| |
| static nsec_t timespec_load_nsec(const struct timespec *ts) { |
| assert(ts); |
| |
| if (ts->tv_sec == (time_t) -1 && ts->tv_nsec == (long) -1) |
| return NSEC_INFINITY; |
| |
| if ((nsec_t) ts->tv_sec >= (UINT64_MAX - ts->tv_nsec) / NSEC_PER_SEC) |
| return NSEC_INFINITY; |
| |
| return (nsec_t) ts->tv_sec * NSEC_PER_SEC + (nsec_t) ts->tv_nsec; |
| } |
| |
| struct timespec *timespec_store(struct timespec *ts, usec_t u) { |
| assert(ts); |
| |
| if (u == USEC_INFINITY) { |
| ts->tv_sec = (time_t) -1; |
| ts->tv_nsec = (long) -1; |
| return ts; |
| } |
| |
| ts->tv_sec = (time_t) (u / USEC_PER_SEC); |
| ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); |
| |
| return ts; |
| } |
| |
| usec_t timeval_load(const struct timeval *tv) { |
| assert(tv); |
| |
| if (tv->tv_sec == (time_t) -1 && |
| tv->tv_usec == (suseconds_t) -1) |
| return USEC_INFINITY; |
| |
| if ((usec_t) tv->tv_sec > (UINT64_MAX - tv->tv_usec) / USEC_PER_SEC) |
| return USEC_INFINITY; |
| |
| return |
| (usec_t) tv->tv_sec * USEC_PER_SEC + |
| (usec_t) tv->tv_usec; |
| } |
| |
| struct timeval *timeval_store(struct timeval *tv, usec_t u) { |
| assert(tv); |
| |
| if (u == USEC_INFINITY) { |
| tv->tv_sec = (time_t) -1; |
| tv->tv_usec = (suseconds_t) -1; |
| } else { |
| tv->tv_sec = (time_t) (u / USEC_PER_SEC); |
| tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); |
| } |
| |
| return tv; |
| } |
| |
| static char *format_timestamp_internal(char *buf, size_t l, usec_t t, |
| bool utc, bool us) { |
| struct tm tm; |
| time_t sec; |
| int k; |
| |
| assert(buf); |
| assert(l > 0); |
| |
| if (t <= 0 || t == USEC_INFINITY) |
| return NULL; |
| |
| sec = (time_t) (t / USEC_PER_SEC); |
| localtime_or_gmtime_r(&sec, &tm, utc); |
| |
| if (us) |
| k = strftime(buf, l, "%a %Y-%m-%d %H:%M:%S", &tm); |
| else |
| k = strftime(buf, l, "%a %Y-%m-%d %H:%M:%S %Z", &tm); |
| |
| if (k <= 0) |
| return NULL; |
| if (us) { |
| snprintf(buf + strlen(buf), l - strlen(buf), ".%06llu", (unsigned long long) (t % USEC_PER_SEC)); |
| if (strftime(buf + strlen(buf), l - strlen(buf), " %Z", &tm) <= 0) |
| return NULL; |
| } |
| |
| return buf; |
| } |
| |
| char *format_timestamp(char *buf, size_t l, usec_t t) { |
| return format_timestamp_internal(buf, l, t, false, false); |
| } |
| |
| char *format_timestamp_utc(char *buf, size_t l, usec_t t) { |
| return format_timestamp_internal(buf, l, t, true, false); |
| } |
| |
| char *format_timestamp_us(char *buf, size_t l, usec_t t) { |
| return format_timestamp_internal(buf, l, t, false, true); |
| } |
| |
| char *format_timestamp_us_utc(char *buf, size_t l, usec_t t) { |
| return format_timestamp_internal(buf, l, t, true, true); |
| } |
| |
| char *format_timestamp_relative(char *buf, size_t l, usec_t t) { |
| const char *s; |
| usec_t n, d; |
| |
| if (t <= 0 || t == USEC_INFINITY) |
| return NULL; |
| |
| n = now(CLOCK_REALTIME); |
| if (n > t) { |
| d = n - t; |
| s = "ago"; |
| } else { |
| d = t - n; |
| s = "left"; |
| } |
| |
| if (d >= USEC_PER_YEAR) |
| snprintf(buf, l, USEC_FMT " years " USEC_FMT " months %s", |
| d / USEC_PER_YEAR, |
| (d % USEC_PER_YEAR) / USEC_PER_MONTH, s); |
| else if (d >= USEC_PER_MONTH) |
| snprintf(buf, l, USEC_FMT " months " USEC_FMT " days %s", |
| d / USEC_PER_MONTH, |
| (d % USEC_PER_MONTH) / USEC_PER_DAY, s); |
| else if (d >= USEC_PER_WEEK) |
| snprintf(buf, l, USEC_FMT " weeks " USEC_FMT " days %s", |
| d / USEC_PER_WEEK, |
| (d % USEC_PER_WEEK) / USEC_PER_DAY, s); |
| else if (d >= 2*USEC_PER_DAY) |
| snprintf(buf, l, USEC_FMT " days %s", d / USEC_PER_DAY, s); |
| else if (d >= 25*USEC_PER_HOUR) |
| snprintf(buf, l, "1 day " USEC_FMT "h %s", |
| (d - USEC_PER_DAY) / USEC_PER_HOUR, s); |
| else if (d >= 6*USEC_PER_HOUR) |
| snprintf(buf, l, USEC_FMT "h %s", |
| d / USEC_PER_HOUR, s); |
| else if (d >= USEC_PER_HOUR) |
| snprintf(buf, l, USEC_FMT "h " USEC_FMT "min %s", |
| d / USEC_PER_HOUR, |
| (d % USEC_PER_HOUR) / USEC_PER_MINUTE, s); |
| else if (d >= 5*USEC_PER_MINUTE) |
| snprintf(buf, l, USEC_FMT "min %s", |
| d / USEC_PER_MINUTE, s); |
| else if (d >= USEC_PER_MINUTE) |
| snprintf(buf, l, USEC_FMT "min " USEC_FMT "s %s", |
| d / USEC_PER_MINUTE, |
| (d % USEC_PER_MINUTE) / USEC_PER_SEC, s); |
| else if (d >= USEC_PER_SEC) |
| snprintf(buf, l, USEC_FMT "s %s", |
| d / USEC_PER_SEC, s); |
| else if (d >= USEC_PER_MSEC) |
| snprintf(buf, l, USEC_FMT "ms %s", |
| d / USEC_PER_MSEC, s); |
| else if (d > 0) |
| snprintf(buf, l, USEC_FMT"us %s", |
| d, s); |
| else |
| snprintf(buf, l, "now"); |
| |
| buf[l-1] = 0; |
| return buf; |
| } |
| |
| char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy) { |
| static const struct { |
| const char *suffix; |
| usec_t usec; |
| } table[] = { |
| { "y", USEC_PER_YEAR }, |
| { "month", USEC_PER_MONTH }, |
| { "w", USEC_PER_WEEK }, |
| { "d", USEC_PER_DAY }, |
| { "h", USEC_PER_HOUR }, |
| { "min", USEC_PER_MINUTE }, |
| { "s", USEC_PER_SEC }, |
| { "ms", USEC_PER_MSEC }, |
| { "us", 1 }, |
| }; |
| |
| unsigned i; |
| char *p = buf; |
| bool something = false; |
| |
| assert(buf); |
| assert(l > 0); |
| |
| if (t == USEC_INFINITY) { |
| strncpy(p, "infinity", l-1); |
| p[l-1] = 0; |
| return p; |
| } |
| |
| if (t <= 0) { |
| strncpy(p, "0", l-1); |
| p[l-1] = 0; |
| return p; |
| } |
| |
| /* The result of this function can be parsed with parse_sec */ |
| |
| for (i = 0; i < ELEMENTSOF(table); i++) { |
| int k = 0; |
| size_t n; |
| bool done = false; |
| usec_t a, b; |
| |
| if (t <= 0) |
| break; |
| |
| if (t < accuracy && something) |
| break; |
| |
| if (t < table[i].usec) |
| continue; |
| |
| if (l <= 1) |
| break; |
| |
| a = t / table[i].usec; |
| b = t % table[i].usec; |
| |
| /* Let's see if we should shows this in dot notation */ |
| if (t < USEC_PER_MINUTE && b > 0) { |
| usec_t cc; |
| int j; |
| |
| j = 0; |
| for (cc = table[i].usec; cc > 1; cc /= 10) |
| j++; |
| |
| for (cc = accuracy; cc > 1; cc /= 10) { |
| b /= 10; |
| j--; |
| } |
| |
| if (j > 0) { |
| k = snprintf(p, l, |
| "%s"USEC_FMT".%0*llu%s", |
| p > buf ? " " : "", |
| a, |
| j, |
| (unsigned long long) b, |
| table[i].suffix); |
| |
| t = 0; |
| done = true; |
| } |
| } |
| |
| /* No? Then let's show it normally */ |
| if (!done) { |
| k = snprintf(p, l, |
| "%s"USEC_FMT"%s", |
| p > buf ? " " : "", |
| a, |
| table[i].suffix); |
| |
| t = b; |
| } |
| |
| n = MIN((size_t) k, l); |
| |
| l -= n; |
| p += n; |
| |
| something = true; |
| } |
| |
| *p = 0; |
| |
| return buf; |
| } |
| |
| void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
| |
| assert(f); |
| assert(name); |
| assert(t); |
| |
| if (!dual_timestamp_is_set(t)) |
| return; |
| |
| fprintf(f, "%s="USEC_FMT" "USEC_FMT"\n", |
| name, |
| t->realtime, |
| t->monotonic); |
| } |
| |
| int dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
| unsigned long long a, b; |
| |
| assert(value); |
| assert(t); |
| |
| if (sscanf(value, "%llu %llu", &a, &b) != 2) { |
| log_debug("Failed to parse dual timestamp value \"%s\": %m", value); |
| return -EINVAL; |
| } |
| |
| t->realtime = a; |
| t->monotonic = b; |
| |
| return 0; |
| } |
| |
| int timestamp_deserialize(const char *value, usec_t *timestamp) { |
| int r; |
| |
| assert(value); |
| |
| r = safe_atou64(value, timestamp); |
| if (r < 0) |
| return log_debug_errno(r, "Failed to parse timestamp value \"%s\": %m", value); |
| |
| return r; |
| } |
| |
| int parse_timestamp(const char *t, usec_t *usec) { |
| static const struct { |
| const char *name; |
| const int nr; |
| } day_nr[] = { |
| { "Sunday", 0 }, |
| { "Sun", 0 }, |
| { "Monday", 1 }, |
| { "Mon", 1 }, |
| { "Tuesday", 2 }, |
| { "Tue", 2 }, |
| { "Wednesday", 3 }, |
| { "Wed", 3 }, |
| { "Thursday", 4 }, |
| { "Thu", 4 }, |
| { "Friday", 5 }, |
| { "Fri", 5 }, |
| { "Saturday", 6 }, |
| { "Sat", 6 }, |
| }; |
| |
| const char *k; |
| const char *utc; |
| struct tm tm, copy; |
| time_t x; |
| usec_t x_usec, plus = 0, minus = 0, ret; |
| int r, weekday = -1; |
| unsigned i; |
| |
| /* |
| * Allowed syntaxes: |
| * |
| * 2012-09-22 16:34:22 |
| * 2012-09-22 16:34 (seconds will be set to 0) |
| * 2012-09-22 (time will be set to 00:00:00) |
| * 16:34:22 (date will be set to today) |
| * 16:34 (date will be set to today, seconds to 0) |
| * now |
| * yesterday (time is set to 00:00:00) |
| * today (time is set to 00:00:00) |
| * tomorrow (time is set to 00:00:00) |
| * +5min |
| * -5days |
| * @2147483647 (seconds since epoch) |
| * |
| */ |
| |
| assert(t); |
| assert(usec); |
| |
| if (t[0] == '@') |
| return parse_sec(t + 1, usec); |
| |
| ret = now(CLOCK_REALTIME); |
| |
| if (streq(t, "now")) |
| goto finish; |
| |
| else if (t[0] == '+') { |
| r = parse_sec(t+1, &plus); |
| if (r < 0) |
| return r; |
| |
| goto finish; |
| |
| } else if (t[0] == '-') { |
| r = parse_sec(t+1, &minus); |
| if (r < 0) |
| return r; |
| |
| goto finish; |
| |
| } else if ((k = endswith(t, " ago"))) { |
| t = strndupa(t, k - t); |
| |
| r = parse_sec(t, &minus); |
| if (r < 0) |
| return r; |
| |
| goto finish; |
| |
| } else if ((k = endswith(t, " left"))) { |
| t = strndupa(t, k - t); |
| |
| r = parse_sec(t, &plus); |
| if (r < 0) |
| return r; |
| |
| goto finish; |
| } |
| |
| utc = endswith_no_case(t, " UTC"); |
| if (utc) |
| t = strndupa(t, utc - t); |
| |
| x = ret / USEC_PER_SEC; |
| x_usec = 0; |
| |
| assert_se(localtime_or_gmtime_r(&x, &tm, utc)); |
| tm.tm_isdst = -1; |
| |
| if (streq(t, "today")) { |
| tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
| goto from_tm; |
| |
| } else if (streq(t, "yesterday")) { |
| tm.tm_mday--; |
| tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
| goto from_tm; |
| |
| } else if (streq(t, "tomorrow")) { |
| tm.tm_mday++; |
| tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
| goto from_tm; |
| } |
| |
| |
| for (i = 0; i < ELEMENTSOF(day_nr); i++) { |
| size_t skip; |
| |
| if (!startswith_no_case(t, day_nr[i].name)) |
| continue; |
| |
| skip = strlen(day_nr[i].name); |
| if (t[skip] != ' ') |
| continue; |
| |
| weekday = day_nr[i].nr; |
| t += skip + 1; |
| break; |
| } |
| |
| copy = tm; |
| k = strptime(t, "%y-%m-%d %H:%M:%S", &tm); |
| if (k) { |
| if (*k == '.') |
| goto parse_usec; |
| else if (*k == 0) |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm); |
| if (k) { |
| if (*k == '.') |
| goto parse_usec; |
| else if (*k == 0) |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%y-%m-%d %H:%M", &tm); |
| if (k && *k == 0) { |
| tm.tm_sec = 0; |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%Y-%m-%d %H:%M", &tm); |
| if (k && *k == 0) { |
| tm.tm_sec = 0; |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%y-%m-%d", &tm); |
| if (k && *k == 0) { |
| tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%Y-%m-%d", &tm); |
| if (k && *k == 0) { |
| tm.tm_sec = tm.tm_min = tm.tm_hour = 0; |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%H:%M:%S", &tm); |
| if (k) { |
| if (*k == '.') |
| goto parse_usec; |
| else if (*k == 0) |
| goto from_tm; |
| } |
| |
| tm = copy; |
| k = strptime(t, "%H:%M", &tm); |
| if (k && *k == 0) { |
| tm.tm_sec = 0; |
| goto from_tm; |
| } |
| |
| return -EINVAL; |
| |
| parse_usec: |
| { |
| unsigned add; |
| |
| k++; |
| r = parse_fractional_part_u(&k, 6, &add); |
| if (r < 0) |
| return -EINVAL; |
| |
| if (*k) |
| return -EINVAL; |
| |
| x_usec = add; |
| |
| } |
| |
| from_tm: |
| x = mktime_or_timegm(&tm, utc); |
| if (x == (time_t) -1) |
| return -EINVAL; |
| |
| if (weekday >= 0 && tm.tm_wday != weekday) |
| return -EINVAL; |
| |
| ret = (usec_t) x * USEC_PER_SEC + x_usec; |
| |
| finish: |
| ret += plus; |
| if (ret > minus) |
| ret -= minus; |
| else |
| ret = 0; |
| |
| *usec = ret; |
| |
| return 0; |
| } |
| |
| static char* extract_multiplier(char *p, usec_t *multiplier) { |
| static const struct { |
| const char *suffix; |
| usec_t usec; |
| } table[] = { |
| { "seconds", USEC_PER_SEC }, |
| { "second", USEC_PER_SEC }, |
| { "sec", USEC_PER_SEC }, |
| { "s", USEC_PER_SEC }, |
| { "minutes", USEC_PER_MINUTE }, |
| { "minute", USEC_PER_MINUTE }, |
| { "min", USEC_PER_MINUTE }, |
| { "months", USEC_PER_MONTH }, |
| { "month", USEC_PER_MONTH }, |
| { "M", USEC_PER_MONTH }, |
| { "msec", USEC_PER_MSEC }, |
| { "ms", USEC_PER_MSEC }, |
| { "m", USEC_PER_MINUTE }, |
| { "hours", USEC_PER_HOUR }, |
| { "hour", USEC_PER_HOUR }, |
| { "hr", USEC_PER_HOUR }, |
| { "h", USEC_PER_HOUR }, |
| { "days", USEC_PER_DAY }, |
| { "day", USEC_PER_DAY }, |
| { "d", USEC_PER_DAY }, |
| { "weeks", USEC_PER_WEEK }, |
| { "week", USEC_PER_WEEK }, |
| { "w", USEC_PER_WEEK }, |
| { "years", USEC_PER_YEAR }, |
| { "year", USEC_PER_YEAR }, |
| { "y", USEC_PER_YEAR }, |
| { "usec", 1ULL }, |
| { "us", 1ULL }, |
| }; |
| unsigned i; |
| |
| for (i = 0; i < ELEMENTSOF(table); i++) { |
| char *e; |
| |
| e = startswith(p, table[i].suffix); |
| if (e) { |
| *multiplier = table[i].usec; |
| return e; |
| } |
| } |
| |
| return p; |
| } |
| |
| int parse_time(const char *t, usec_t *usec, usec_t default_unit) { |
| const char *p, *s; |
| usec_t r = 0; |
| bool something = false; |
| |
| assert(t); |
| assert(usec); |
| assert(default_unit > 0); |
| |
| p = t; |
| |
| p += strspn(p, WHITESPACE); |
| s = startswith(p, "infinity"); |
| if (s) { |
| s += strspn(s, WHITESPACE); |
| if (*s != 0) |
| return -EINVAL; |
| |
| *usec = USEC_INFINITY; |
| return 0; |
| } |
| |
| for (;;) { |
| long long l, z = 0; |
| char *e; |
| unsigned n = 0; |
| usec_t multiplier = default_unit, k; |
| |
| p += strspn(p, WHITESPACE); |
| |
| if (*p == 0) { |
| if (!something) |
| return -EINVAL; |
| |
| break; |
| } |
| |
| errno = 0; |
| l = strtoll(p, &e, 10); |
| if (errno > 0) |
| return -errno; |
| if (l < 0) |
| return -ERANGE; |
| |
| if (*e == '.') { |
| char *b = e + 1; |
| |
| errno = 0; |
| z = strtoll(b, &e, 10); |
| if (errno > 0) |
| return -errno; |
| |
| if (z < 0) |
| return -ERANGE; |
| |
| if (e == b) |
| return -EINVAL; |
| |
| n = e - b; |
| |
| } else if (e == p) |
| return -EINVAL; |
| |
| e += strspn(e, WHITESPACE); |
| p = extract_multiplier(e, &multiplier); |
| |
| something = true; |
| |
| k = (usec_t) z * multiplier; |
| |
| for (; n > 0; n--) |
| k /= 10; |
| |
| r += (usec_t) l * multiplier + k; |
| } |
| |
| *usec = r; |
| |
| return 0; |
| } |
| |
| int parse_sec(const char *t, usec_t *usec) { |
| return parse_time(t, usec, USEC_PER_SEC); |
| } |
| |
| int parse_nsec(const char *t, nsec_t *nsec) { |
| static const struct { |
| const char *suffix; |
| nsec_t nsec; |
| } table[] = { |
| { "seconds", NSEC_PER_SEC }, |
| { "second", NSEC_PER_SEC }, |
| { "sec", NSEC_PER_SEC }, |
| { "s", NSEC_PER_SEC }, |
| { "minutes", NSEC_PER_MINUTE }, |
| { "minute", NSEC_PER_MINUTE }, |
| { "min", NSEC_PER_MINUTE }, |
| { "months", NSEC_PER_MONTH }, |
| { "month", NSEC_PER_MONTH }, |
| { "msec", NSEC_PER_MSEC }, |
| { "ms", NSEC_PER_MSEC }, |
| { "m", NSEC_PER_MINUTE }, |
| { "hours", NSEC_PER_HOUR }, |
| { "hour", NSEC_PER_HOUR }, |
| { "hr", NSEC_PER_HOUR }, |
| { "h", NSEC_PER_HOUR }, |
| { "days", NSEC_PER_DAY }, |
| { "day", NSEC_PER_DAY }, |
| { "d", NSEC_PER_DAY }, |
| { "weeks", NSEC_PER_WEEK }, |
| { "week", NSEC_PER_WEEK }, |
| { "w", NSEC_PER_WEEK }, |
| { "years", NSEC_PER_YEAR }, |
| { "year", NSEC_PER_YEAR }, |
| { "y", NSEC_PER_YEAR }, |
| { "usec", NSEC_PER_USEC }, |
| { "us", NSEC_PER_USEC }, |
| { "nsec", 1ULL }, |
| { "ns", 1ULL }, |
| { "", 1ULL }, /* default is nsec */ |
| }; |
| |
| const char *p, *s; |
| nsec_t r = 0; |
| bool something = false; |
| |
| assert(t); |
| assert(nsec); |
| |
| p = t; |
| |
| p += strspn(p, WHITESPACE); |
| s = startswith(p, "infinity"); |
| if (s) { |
| s += strspn(s, WHITESPACE); |
| if (*s != 0) |
| return -EINVAL; |
| |
| *nsec = NSEC_INFINITY; |
| return 0; |
| } |
| |
| for (;;) { |
| long long l, z = 0; |
| char *e; |
| unsigned i, n = 0; |
| |
| p += strspn(p, WHITESPACE); |
| |
| if (*p == 0) { |
| if (!something) |
| return -EINVAL; |
| |
| break; |
| } |
| |
| errno = 0; |
| l = strtoll(p, &e, 10); |
| |
| if (errno > 0) |
| return -errno; |
| |
| if (l < 0) |
| return -ERANGE; |
| |
| if (*e == '.') { |
| char *b = e + 1; |
| |
| errno = 0; |
| z = strtoll(b, &e, 10); |
| if (errno > 0) |
| return -errno; |
| |
| if (z < 0) |
| return -ERANGE; |
| |
| if (e == b) |
| return -EINVAL; |
| |
| n = e - b; |
| |
| } else if (e == p) |
| return -EINVAL; |
| |
| e += strspn(e, WHITESPACE); |
| |
| for (i = 0; i < ELEMENTSOF(table); i++) |
| if (startswith(e, table[i].suffix)) { |
| nsec_t k = (nsec_t) z * table[i].nsec; |
| |
| for (; n > 0; n--) |
| k /= 10; |
| |
| r += (nsec_t) l * table[i].nsec + k; |
| p = e + strlen(table[i].suffix); |
| |
| something = true; |
| break; |
| } |
| |
| if (i >= ELEMENTSOF(table)) |
| return -EINVAL; |
| |
| } |
| |
| *nsec = r; |
| |
| return 0; |
| } |
| |
| bool ntp_synced(void) { |
| struct timex txc = {}; |
| |
| if (adjtimex(&txc) < 0) |
| return false; |
| |
| if (txc.status & STA_UNSYNC) |
| return false; |
| |
| return true; |
| } |
| |
| int get_timezones(char ***ret) { |
| _cleanup_fclose_ FILE *f = NULL; |
| _cleanup_strv_free_ char **zones = NULL; |
| size_t n_zones = 0, n_allocated = 0; |
| |
| assert(ret); |
| |
| zones = strv_new("UTC", NULL); |
| if (!zones) |
| return -ENOMEM; |
| |
| n_allocated = 2; |
| n_zones = 1; |
| |
| f = fopen("/usr/share/zoneinfo/zone.tab", "re"); |
| if (f) { |
| char l[LINE_MAX]; |
| |
| FOREACH_LINE(l, f, return -errno) { |
| char *p, *w; |
| size_t k; |
| |
| p = strstrip(l); |
| |
| if (isempty(p) || *p == '#') |
| continue; |
| |
| /* Skip over country code */ |
| p += strcspn(p, WHITESPACE); |
| p += strspn(p, WHITESPACE); |
| |
| /* Skip over coordinates */ |
| p += strcspn(p, WHITESPACE); |
| p += strspn(p, WHITESPACE); |
| |
| /* Found timezone name */ |
| k = strcspn(p, WHITESPACE); |
| if (k <= 0) |
| continue; |
| |
| w = strndup(p, k); |
| if (!w) |
| return -ENOMEM; |
| |
| if (!GREEDY_REALLOC(zones, n_allocated, n_zones + 2)) { |
| free(w); |
| return -ENOMEM; |
| } |
| |
| zones[n_zones++] = w; |
| zones[n_zones] = NULL; |
| } |
| |
| strv_sort(zones); |
| |
| } else if (errno != ENOENT) |
| return -errno; |
| |
| *ret = zones; |
| zones = NULL; |
| |
| return 0; |
| } |
| |
| bool timezone_is_valid(const char *name) { |
| bool slash = false; |
| const char *p, *t; |
| struct stat st; |
| |
| if (isempty(name)) |
| return false; |
| |
| if (name[0] == '/') |
| return false; |
| |
| for (p = name; *p; p++) { |
| if (!(*p >= '0' && *p <= '9') && |
| !(*p >= 'a' && *p <= 'z') && |
| !(*p >= 'A' && *p <= 'Z') && |
| !(*p == '-' || *p == '_' || *p == '+' || *p == '/')) |
| return false; |
| |
| if (*p == '/') { |
| |
| if (slash) |
| return false; |
| |
| slash = true; |
| } else |
| slash = false; |
| } |
| |
| if (slash) |
| return false; |
| |
| t = strjoina("/usr/share/zoneinfo/", name); |
| if (stat(t, &st) < 0) |
| return false; |
| |
| if (!S_ISREG(st.st_mode)) |
| return false; |
| |
| return true; |
| } |
| |
| bool clock_boottime_supported(void) { |
| static int supported = -1; |
| |
| /* Note that this checks whether CLOCK_BOOTTIME is available in general as well as available for timerfds()! */ |
| |
| if (supported < 0) { |
| int fd; |
| |
| fd = timerfd_create(CLOCK_BOOTTIME, TFD_NONBLOCK|TFD_CLOEXEC); |
| if (fd < 0) |
| supported = false; |
| else { |
| safe_close(fd); |
| supported = true; |
| } |
| } |
| |
| return supported; |
| } |
| |
| clockid_t clock_boottime_or_monotonic(void) { |
| if (clock_boottime_supported()) |
| return CLOCK_BOOTTIME; |
| else |
| return CLOCK_MONOTONIC; |
| } |
| |
| bool clock_supported(clockid_t clock) { |
| struct timespec ts; |
| |
| switch (clock) { |
| |
| case CLOCK_MONOTONIC: |
| case CLOCK_REALTIME: |
| return true; |
| |
| case CLOCK_BOOTTIME: |
| return clock_boottime_supported(); |
| |
| case CLOCK_BOOTTIME_ALARM: |
| if (!clock_boottime_supported()) |
| return false; |
| |
| /* fall through, after checking the cached value for CLOCK_BOOTTIME. */ |
| |
| default: |
| /* For everything else, check properly */ |
| return clock_gettime(clock, &ts) >= 0; |
| } |
| } |
| |
| int get_timezone(char **tz) { |
| _cleanup_free_ char *t = NULL; |
| const char *e; |
| char *z; |
| int r; |
| |
| r = readlink_malloc("/etc/localtime", &t); |
| if (r < 0) |
| return r; /* returns EINVAL if not a symlink */ |
| |
| e = path_startswith(t, "/usr/share/zoneinfo/"); |
| if (!e) |
| e = path_startswith(t, "../usr/share/zoneinfo/"); |
| if (!e) |
| return -EINVAL; |
| |
| if (!timezone_is_valid(e)) |
| return -EINVAL; |
| |
| z = strdup(e); |
| if (!z) |
| return -ENOMEM; |
| |
| *tz = z; |
| return 0; |
| } |
| |
| time_t mktime_or_timegm(struct tm *tm, bool utc) { |
| return utc ? timegm(tm) : mktime(tm); |
| } |
| |
| struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc) { |
| return utc ? gmtime_r(t, tm) : localtime_r(t, tm); |
| } |
| |
| unsigned long usec_to_jiffies(usec_t u) { |
| static thread_local unsigned long hz = 0; |
| long r; |
| |
| if (hz == 0) { |
| r = sysconf(_SC_CLK_TCK); |
| |
| assert(r > 0); |
| hz = (unsigned long) r; |
| } |
| |
| return DIV_ROUND_UP(u , USEC_PER_SEC / hz); |
| } |