1613 lines
48 KiB
C
1613 lines
48 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/time.h>
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#include <sys/timerfd.h>
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#include <sys/timex.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "fs-util.h"
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#include "io-util.h"
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#include "log.h"
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#include "macro.h"
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#include "missing_timerfd.h"
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#include "parse-util.h"
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#include "path-util.h"
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#include "process-util.h"
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#include "stat-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#include "time-util.h"
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static clockid_t map_clock_id(clockid_t c) {
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/* Some more exotic archs (s390, ppc, …) lack the "ALARM" flavour of the clocks. Thus, clock_gettime() will
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* fail for them. Since they are essentially the same as their non-ALARM pendants (their only difference is
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* when timers are set on them), let's just map them accordingly. This way, we can get the correct time even on
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* those archs. */
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switch (c) {
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case CLOCK_BOOTTIME_ALARM:
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return CLOCK_BOOTTIME;
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case CLOCK_REALTIME_ALARM:
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return CLOCK_REALTIME;
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default:
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return c;
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}
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}
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usec_t now(clockid_t clock_id) {
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struct timespec ts;
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assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0);
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return timespec_load(&ts);
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}
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nsec_t now_nsec(clockid_t clock_id) {
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struct timespec ts;
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assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0);
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return timespec_load_nsec(&ts);
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}
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dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
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assert(ts);
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ts->realtime = now(CLOCK_REALTIME);
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ts->monotonic = now(CLOCK_MONOTONIC);
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return ts;
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}
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triple_timestamp* triple_timestamp_get(triple_timestamp *ts) {
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assert(ts);
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ts->realtime = now(CLOCK_REALTIME);
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ts->monotonic = now(CLOCK_MONOTONIC);
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ts->boottime = clock_boottime_supported() ? now(CLOCK_BOOTTIME) : USEC_INFINITY;
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return ts;
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}
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static usec_t map_clock_usec_internal(usec_t from, usec_t from_base, usec_t to_base) {
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/* Maps the time 'from' between two clocks, based on a common reference point where the first clock
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* is at 'from_base' and the second clock at 'to_base'. Basically calculates:
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*
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* from - from_base + to_base
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*
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* But takes care of overflows/underflows and avoids signed operations. */
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if (from >= from_base) { /* In the future */
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usec_t delta = from - from_base;
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if (to_base >= USEC_INFINITY - delta) /* overflow? */
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return USEC_INFINITY;
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return to_base + delta;
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} else { /* In the past */
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usec_t delta = from_base - from;
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if (to_base <= delta) /* underflow? */
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return 0;
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return to_base - delta;
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}
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}
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usec_t map_clock_usec(usec_t from, clockid_t from_clock, clockid_t to_clock) {
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/* Try to avoid any inaccuracy needlessly added in case we convert from effectively the same clock
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* onto itself */
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if (map_clock_id(from_clock) == map_clock_id(to_clock))
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return from;
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/* Keep infinity as is */
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if (from == USEC_INFINITY)
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return from;
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return map_clock_usec_internal(from, now(from_clock), now(to_clock));
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}
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dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
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assert(ts);
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if (u == USEC_INFINITY || u == 0) {
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ts->realtime = ts->monotonic = u;
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return ts;
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}
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ts->realtime = u;
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ts->monotonic = map_clock_usec(u, CLOCK_REALTIME, CLOCK_MONOTONIC);
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return ts;
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}
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triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) {
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usec_t nowr;
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assert(ts);
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if (u == USEC_INFINITY || u == 0) {
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ts->realtime = ts->monotonic = ts->boottime = u;
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return ts;
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}
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nowr = now(CLOCK_REALTIME);
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ts->realtime = u;
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ts->monotonic = map_clock_usec_internal(u, nowr, now(CLOCK_MONOTONIC));
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ts->boottime = clock_boottime_supported() ?
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map_clock_usec_internal(u, nowr, now(CLOCK_BOOTTIME)) :
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USEC_INFINITY;
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return ts;
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}
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dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) {
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assert(ts);
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if (u == USEC_INFINITY) {
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ts->realtime = ts->monotonic = USEC_INFINITY;
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return ts;
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}
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ts->monotonic = u;
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ts->realtime = map_clock_usec(u, CLOCK_MONOTONIC, CLOCK_REALTIME);
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return ts;
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}
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dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u) {
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clockid_t cid;
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usec_t nowm;
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if (u == USEC_INFINITY) {
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ts->realtime = ts->monotonic = USEC_INFINITY;
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return ts;
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}
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cid = clock_boottime_or_monotonic();
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nowm = now(cid);
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if (cid == CLOCK_MONOTONIC)
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ts->monotonic = u;
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else
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ts->monotonic = map_clock_usec_internal(u, nowm, now(CLOCK_MONOTONIC));
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ts->realtime = map_clock_usec_internal(u, nowm, now(CLOCK_REALTIME));
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return ts;
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}
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usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) {
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switch (clock) {
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case CLOCK_REALTIME:
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case CLOCK_REALTIME_ALARM:
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return ts->realtime;
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case CLOCK_MONOTONIC:
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return ts->monotonic;
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case CLOCK_BOOTTIME:
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case CLOCK_BOOTTIME_ALARM:
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return ts->boottime;
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default:
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return USEC_INFINITY;
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}
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}
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usec_t timespec_load(const struct timespec *ts) {
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assert(ts);
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if (ts->tv_sec < 0 || ts->tv_nsec < 0)
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return USEC_INFINITY;
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if ((usec_t) ts->tv_sec > (UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / USEC_PER_SEC)
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return USEC_INFINITY;
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return
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(usec_t) ts->tv_sec * USEC_PER_SEC +
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(usec_t) ts->tv_nsec / NSEC_PER_USEC;
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}
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nsec_t timespec_load_nsec(const struct timespec *ts) {
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assert(ts);
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if (ts->tv_sec < 0 || ts->tv_nsec < 0)
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return NSEC_INFINITY;
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if ((nsec_t) ts->tv_sec >= (UINT64_MAX - ts->tv_nsec) / NSEC_PER_SEC)
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return NSEC_INFINITY;
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return (nsec_t) ts->tv_sec * NSEC_PER_SEC + (nsec_t) ts->tv_nsec;
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}
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struct timespec *timespec_store(struct timespec *ts, usec_t u) {
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assert(ts);
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if (u == USEC_INFINITY ||
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u / USEC_PER_SEC >= TIME_T_MAX) {
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ts->tv_sec = (time_t) -1;
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ts->tv_nsec = -1L;
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return ts;
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}
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ts->tv_sec = (time_t) (u / USEC_PER_SEC);
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ts->tv_nsec = (long) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
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return ts;
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}
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struct timespec *timespec_store_nsec(struct timespec *ts, nsec_t n) {
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assert(ts);
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if (n == NSEC_INFINITY ||
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n / NSEC_PER_SEC >= TIME_T_MAX) {
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ts->tv_sec = (time_t) -1;
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ts->tv_nsec = -1L;
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return ts;
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}
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ts->tv_sec = (time_t) (n / NSEC_PER_SEC);
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ts->tv_nsec = (long) (n % NSEC_PER_SEC);
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return ts;
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}
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usec_t timeval_load(const struct timeval *tv) {
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assert(tv);
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if (tv->tv_sec < 0 || tv->tv_usec < 0)
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return USEC_INFINITY;
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if ((usec_t) tv->tv_sec > (UINT64_MAX - tv->tv_usec) / USEC_PER_SEC)
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return USEC_INFINITY;
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return
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(usec_t) tv->tv_sec * USEC_PER_SEC +
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(usec_t) tv->tv_usec;
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}
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struct timeval *timeval_store(struct timeval *tv, usec_t u) {
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assert(tv);
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if (u == USEC_INFINITY ||
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u / USEC_PER_SEC > TIME_T_MAX) {
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tv->tv_sec = (time_t) -1;
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tv->tv_usec = (suseconds_t) -1;
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} else {
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tv->tv_sec = (time_t) (u / USEC_PER_SEC);
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tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
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}
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return tv;
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}
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char *format_timestamp_style(
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char *buf,
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size_t l,
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usec_t t,
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TimestampStyle style) {
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/* The weekdays in non-localized (English) form. We use this instead of the localized form, so that our
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* generated timestamps may be parsed with parse_timestamp(), and always read the same. */
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static const char * const weekdays[] = {
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[0] = "Sun",
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[1] = "Mon",
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[2] = "Tue",
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[3] = "Wed",
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[4] = "Thu",
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[5] = "Fri",
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[6] = "Sat",
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};
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struct tm tm;
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time_t sec;
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size_t n;
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bool utc = false, us = false;
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assert(buf);
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switch (style) {
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case TIMESTAMP_PRETTY:
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break;
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case TIMESTAMP_US:
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us = true;
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break;
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case TIMESTAMP_UTC:
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utc = true;
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break;
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case TIMESTAMP_US_UTC:
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us = true;
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utc = true;
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break;
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default:
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return NULL;
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}
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if (l < (size_t) (3 + /* week day */
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1 + 10 + /* space and date */
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1 + 8 + /* space and time */
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(us ? 1 + 6 : 0) + /* "." and microsecond part */
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1 + 1 + /* space and shortest possible zone */
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1))
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return NULL; /* Not enough space even for the shortest form. */
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if (t <= 0 || t == USEC_INFINITY)
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return NULL; /* Timestamp is unset */
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/* Let's not format times with years > 9999 */
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if (t > USEC_TIMESTAMP_FORMATTABLE_MAX) {
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assert(l >= STRLEN("--- XXXX-XX-XX XX:XX:XX") + 1);
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strcpy(buf, "--- XXXX-XX-XX XX:XX:XX");
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return buf;
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}
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sec = (time_t) (t / USEC_PER_SEC); /* Round down */
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if (!localtime_or_gmtime_r(&sec, &tm, utc))
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return NULL;
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/* Start with the week day */
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assert((size_t) tm.tm_wday < ELEMENTSOF(weekdays));
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memcpy(buf, weekdays[tm.tm_wday], 4);
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/* Add the main components */
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if (strftime(buf + 3, l - 3, " %Y-%m-%d %H:%M:%S", &tm) <= 0)
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return NULL; /* Doesn't fit */
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/* Append the microseconds part, if that's requested */
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if (us) {
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n = strlen(buf);
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if (n + 8 > l)
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return NULL; /* Microseconds part doesn't fit. */
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sprintf(buf + n, ".%06"PRI_USEC, t % USEC_PER_SEC);
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}
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/* Append the timezone */
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n = strlen(buf);
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if (utc) {
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/* If this is UTC then let's explicitly use the "UTC" string here, because gmtime_r() normally uses the
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* obsolete "GMT" instead. */
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if (n + 5 > l)
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return NULL; /* "UTC" doesn't fit. */
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strcpy(buf + n, " UTC");
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} else if (!isempty(tm.tm_zone)) {
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size_t tn;
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/* An explicit timezone is specified, let's use it, if it fits */
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tn = strlen(tm.tm_zone);
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if (n + 1 + tn + 1 > l) {
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/* The full time zone does not fit in. Yuck. */
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if (n + 1 + _POSIX_TZNAME_MAX + 1 > l)
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return NULL; /* Not even enough space for the POSIX minimum (of 6)? In that case, complain that it doesn't fit */
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/* So the time zone doesn't fit in fully, but the caller passed enough space for the POSIX
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* minimum time zone length. In this case suppress the timezone entirely, in order not to dump
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* an overly long, hard to read string on the user. This should be safe, because the user will
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* assume the local timezone anyway if none is shown. And so does parse_timestamp(). */
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} else {
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buf[n++] = ' ';
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strcpy(buf + n, tm.tm_zone);
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}
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}
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return buf;
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}
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char *format_timestamp_relative(char *buf, size_t l, usec_t t) {
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const char *s;
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usec_t n, d;
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if (t <= 0 || t == USEC_INFINITY)
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return NULL;
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n = now(CLOCK_REALTIME);
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if (n > t) {
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d = n - t;
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s = "ago";
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} else {
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d = t - n;
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s = "left";
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}
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if (d >= USEC_PER_YEAR)
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snprintf(buf, l, USEC_FMT " years " USEC_FMT " months %s",
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d / USEC_PER_YEAR,
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(d % USEC_PER_YEAR) / USEC_PER_MONTH, s);
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else if (d >= USEC_PER_MONTH)
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snprintf(buf, l, USEC_FMT " months " USEC_FMT " days %s",
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d / USEC_PER_MONTH,
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(d % USEC_PER_MONTH) / USEC_PER_DAY, s);
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else if (d >= USEC_PER_WEEK)
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snprintf(buf, l, USEC_FMT " weeks " USEC_FMT " days %s",
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d / USEC_PER_WEEK,
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(d % USEC_PER_WEEK) / USEC_PER_DAY, s);
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else if (d >= 2*USEC_PER_DAY)
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snprintf(buf, l, USEC_FMT " days %s", d / USEC_PER_DAY, s);
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else if (d >= 25*USEC_PER_HOUR)
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snprintf(buf, l, "1 day " USEC_FMT "h %s",
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(d - USEC_PER_DAY) / USEC_PER_HOUR, s);
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else if (d >= 6*USEC_PER_HOUR)
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snprintf(buf, l, USEC_FMT "h %s",
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d / USEC_PER_HOUR, s);
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else if (d >= USEC_PER_HOUR)
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snprintf(buf, l, USEC_FMT "h " USEC_FMT "min %s",
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d / USEC_PER_HOUR,
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(d % USEC_PER_HOUR) / USEC_PER_MINUTE, s);
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else if (d >= 5*USEC_PER_MINUTE)
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snprintf(buf, l, USEC_FMT "min %s",
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d / USEC_PER_MINUTE, s);
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else if (d >= USEC_PER_MINUTE)
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snprintf(buf, l, USEC_FMT "min " USEC_FMT "s %s",
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d / USEC_PER_MINUTE,
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(d % USEC_PER_MINUTE) / USEC_PER_SEC, s);
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else if (d >= USEC_PER_SEC)
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snprintf(buf, l, USEC_FMT "s %s",
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d / USEC_PER_SEC, s);
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else if (d >= USEC_PER_MSEC)
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snprintf(buf, l, USEC_FMT "ms %s",
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d / USEC_PER_MSEC, s);
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else if (d > 0)
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snprintf(buf, l, USEC_FMT"us %s",
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d, s);
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else
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snprintf(buf, l, "now");
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buf[l-1] = 0;
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return buf;
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}
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char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy) {
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static const struct {
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const char *suffix;
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usec_t usec;
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} table[] = {
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{ "y", USEC_PER_YEAR },
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{ "month", USEC_PER_MONTH },
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{ "w", USEC_PER_WEEK },
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{ "d", USEC_PER_DAY },
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{ "h", USEC_PER_HOUR },
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{ "min", USEC_PER_MINUTE },
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{ "s", USEC_PER_SEC },
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{ "ms", USEC_PER_MSEC },
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{ "us", 1 },
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};
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size_t i;
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char *p = buf;
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bool something = false;
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assert(buf);
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assert(l > 0);
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|
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;
|
|
signed char 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*"PRI_USEC"%s",
|
|
p > buf ? " " : "",
|
|
a,
|
|
j,
|
|
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;
|
|
}
|
|
|
|
static int parse_timestamp_impl(const char *t, usec_t *usec, bool with_tz) {
|
|
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, *utc = NULL, *tzn = NULL;
|
|
struct tm tm, copy;
|
|
time_t x;
|
|
usec_t x_usec, plus = 0, minus = 0, ret;
|
|
int r, weekday = -1, dst = -1;
|
|
size_t 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);
|
|
|
|
if (t[0] == '@' && !with_tz)
|
|
return parse_sec(t + 1, usec);
|
|
|
|
ret = now(CLOCK_REALTIME);
|
|
|
|
if (!with_tz) {
|
|
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;
|
|
}
|
|
|
|
/* See if the timestamp is suffixed with UTC */
|
|
utc = endswith_no_case(t, " UTC");
|
|
if (utc)
|
|
t = strndupa(t, utc - t);
|
|
else {
|
|
const char *e = NULL;
|
|
int j;
|
|
|
|
tzset();
|
|
|
|
/* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note that we only
|
|
* support the local timezones here, nothing else. Not because we wouldn't want to, but simply because
|
|
* there are no nice APIs available to cover this. By accepting the local time zone strings, we make
|
|
* sure that all timestamps written by format_timestamp() can be parsed correctly, even though we don't
|
|
* support arbitrary timezone specifications. */
|
|
|
|
for (j = 0; j <= 1; j++) {
|
|
|
|
if (isempty(tzname[j]))
|
|
continue;
|
|
|
|
e = endswith_no_case(t, tzname[j]);
|
|
if (!e)
|
|
continue;
|
|
if (e == t)
|
|
continue;
|
|
if (e[-1] != ' ')
|
|
continue;
|
|
|
|
break;
|
|
}
|
|
|
|
if (IN_SET(j, 0, 1)) {
|
|
/* Found one of the two timezones specified. */
|
|
t = strndupa(t, e - t - 1);
|
|
dst = j;
|
|
tzn = tzname[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
x = (time_t) (ret / USEC_PER_SEC);
|
|
x_usec = 0;
|
|
|
|
if (!localtime_or_gmtime_r(&x, &tm, utc))
|
|
return -EINVAL;
|
|
|
|
tm.tm_isdst = dst;
|
|
if (!with_tz && tzn)
|
|
tm.tm_zone = tzn;
|
|
|
|
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:
|
|
if (weekday >= 0 && tm.tm_wday != weekday)
|
|
return -EINVAL;
|
|
|
|
x = mktime_or_timegm(&tm, utc);
|
|
if (x < 0)
|
|
return -EINVAL;
|
|
|
|
ret = (usec_t) x * USEC_PER_SEC + x_usec;
|
|
if (ret > USEC_TIMESTAMP_FORMATTABLE_MAX)
|
|
return -EINVAL;
|
|
|
|
finish:
|
|
if (ret + plus < ret) /* overflow? */
|
|
return -EINVAL;
|
|
ret += plus;
|
|
if (ret > USEC_TIMESTAMP_FORMATTABLE_MAX)
|
|
return -EINVAL;
|
|
|
|
if (ret >= minus)
|
|
ret -= minus;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (usec)
|
|
*usec = ret;
|
|
return 0;
|
|
}
|
|
|
|
typedef struct ParseTimestampResult {
|
|
usec_t usec;
|
|
int return_value;
|
|
} ParseTimestampResult;
|
|
|
|
int parse_timestamp(const char *t, usec_t *usec) {
|
|
char *last_space, *tz = NULL;
|
|
ParseTimestampResult *shared, tmp;
|
|
int r;
|
|
|
|
last_space = strrchr(t, ' ');
|
|
if (last_space != NULL && timezone_is_valid(last_space + 1, LOG_DEBUG))
|
|
tz = last_space + 1;
|
|
|
|
if (!tz || endswith_no_case(t, " UTC"))
|
|
return parse_timestamp_impl(t, usec, false);
|
|
|
|
shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
|
|
if (shared == MAP_FAILED)
|
|
return negative_errno();
|
|
|
|
r = safe_fork("(sd-timestamp)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT, NULL);
|
|
if (r < 0) {
|
|
(void) munmap(shared, sizeof *shared);
|
|
return r;
|
|
}
|
|
if (r == 0) {
|
|
bool with_tz = true;
|
|
char *colon_tz;
|
|
|
|
/* tzset(3) says $TZ should be prefixed with ":" if we reference timezone files */
|
|
colon_tz = strjoina(":", tz);
|
|
|
|
if (setenv("TZ", colon_tz, 1) != 0) {
|
|
shared->return_value = negative_errno();
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
tzset();
|
|
|
|
/* If there is a timezone that matches the tzname fields, leave the parsing to the implementation.
|
|
* Otherwise just cut it off. */
|
|
with_tz = !STR_IN_SET(tz, tzname[0], tzname[1]);
|
|
|
|
/* Cut off the timezone if we don't need it. */
|
|
if (with_tz)
|
|
t = strndupa(t, last_space - t);
|
|
|
|
shared->return_value = parse_timestamp_impl(t, &shared->usec, with_tz);
|
|
|
|
_exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
tmp = *shared;
|
|
if (munmap(shared, sizeof *shared) != 0)
|
|
return negative_errno();
|
|
|
|
if (tmp.return_value == 0 && usec)
|
|
*usec = tmp.usec;
|
|
|
|
return tmp.return_value;
|
|
}
|
|
|
|
static const char* extract_multiplier(const 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 },
|
|
{ "µs", 1ULL },
|
|
};
|
|
size_t 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(default_unit > 0);
|
|
|
|
p = t;
|
|
|
|
p += strspn(p, WHITESPACE);
|
|
s = startswith(p, "infinity");
|
|
if (s) {
|
|
s += strspn(s, WHITESPACE);
|
|
if (*s != 0)
|
|
return -EINVAL;
|
|
|
|
if (usec)
|
|
*usec = USEC_INFINITY;
|
|
return 0;
|
|
}
|
|
|
|
for (;;) {
|
|
usec_t multiplier = default_unit, k;
|
|
long long l;
|
|
char *e;
|
|
|
|
p += strspn(p, WHITESPACE);
|
|
|
|
if (*p == 0) {
|
|
if (!something)
|
|
return -EINVAL;
|
|
|
|
break;
|
|
}
|
|
|
|
if (*p == '-') /* Don't allow "-0" */
|
|
return -ERANGE;
|
|
|
|
errno = 0;
|
|
l = strtoll(p, &e, 10);
|
|
if (errno > 0)
|
|
return -errno;
|
|
if (l < 0)
|
|
return -ERANGE;
|
|
|
|
if (*e == '.') {
|
|
p = e + 1;
|
|
p += strspn(p, DIGITS);
|
|
} else if (e == p)
|
|
return -EINVAL;
|
|
else
|
|
p = e;
|
|
|
|
s = extract_multiplier(p + strspn(p, WHITESPACE), &multiplier);
|
|
if (s == p && *s != '\0')
|
|
/* Don't allow '12.34.56', but accept '12.34 .56' or '12.34s.56'*/
|
|
return -EINVAL;
|
|
|
|
p = s;
|
|
|
|
if ((usec_t) l >= USEC_INFINITY / multiplier)
|
|
return -ERANGE;
|
|
|
|
k = (usec_t) l * multiplier;
|
|
if (k >= USEC_INFINITY - r)
|
|
return -ERANGE;
|
|
|
|
r += k;
|
|
|
|
something = true;
|
|
|
|
if (*e == '.') {
|
|
usec_t m = multiplier / 10;
|
|
const char *b;
|
|
|
|
for (b = e + 1; *b >= '0' && *b <= '9'; b++, m /= 10) {
|
|
k = (usec_t) (*b - '0') * m;
|
|
if (k >= USEC_INFINITY - r)
|
|
return -ERANGE;
|
|
|
|
r += k;
|
|
}
|
|
|
|
/* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge"*/
|
|
if (b == e + 1)
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (usec)
|
|
*usec = r;
|
|
return 0;
|
|
}
|
|
|
|
int parse_sec(const char *t, usec_t *usec) {
|
|
return parse_time(t, usec, USEC_PER_SEC);
|
|
}
|
|
|
|
int parse_sec_fix_0(const char *t, usec_t *ret) {
|
|
usec_t k;
|
|
int r;
|
|
|
|
assert(t);
|
|
assert(ret);
|
|
|
|
r = parse_sec(t, &k);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*ret = k == 0 ? USEC_INFINITY : k;
|
|
return r;
|
|
}
|
|
|
|
int parse_sec_def_infinity(const char *t, usec_t *ret) {
|
|
t += strspn(t, WHITESPACE);
|
|
if (isempty(t)) {
|
|
*ret = USEC_INFINITY;
|
|
return 0;
|
|
}
|
|
return parse_sec(t, ret);
|
|
}
|
|
|
|
static const char* extract_nsec_multiplier(const char *p, nsec_t *multiplier) {
|
|
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 },
|
|
{ "M", 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 },
|
|
{ "µs", NSEC_PER_USEC },
|
|
{ "nsec", 1ULL },
|
|
{ "ns", 1ULL },
|
|
{ "", 1ULL }, /* default is nsec */
|
|
};
|
|
size_t i;
|
|
|
|
for (i = 0; i < ELEMENTSOF(table); i++) {
|
|
char *e;
|
|
|
|
e = startswith(p, table[i].suffix);
|
|
if (e) {
|
|
*multiplier = table[i].nsec;
|
|
return e;
|
|
}
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
int parse_nsec(const char *t, nsec_t *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 (;;) {
|
|
nsec_t multiplier = 1, k;
|
|
long long l;
|
|
char *e;
|
|
|
|
p += strspn(p, WHITESPACE);
|
|
|
|
if (*p == 0) {
|
|
if (!something)
|
|
return -EINVAL;
|
|
|
|
break;
|
|
}
|
|
|
|
if (*p == '-') /* Don't allow "-0" */
|
|
return -ERANGE;
|
|
|
|
errno = 0;
|
|
l = strtoll(p, &e, 10);
|
|
if (errno > 0)
|
|
return -errno;
|
|
if (l < 0)
|
|
return -ERANGE;
|
|
|
|
if (*e == '.') {
|
|
p = e + 1;
|
|
p += strspn(p, DIGITS);
|
|
} else if (e == p)
|
|
return -EINVAL;
|
|
else
|
|
p = e;
|
|
|
|
s = extract_nsec_multiplier(p + strspn(p, WHITESPACE), &multiplier);
|
|
if (s == p && *s != '\0')
|
|
/* Don't allow '12.34.56', but accept '12.34 .56' or '12.34s.56'*/
|
|
return -EINVAL;
|
|
|
|
p = s;
|
|
|
|
if ((nsec_t) l >= NSEC_INFINITY / multiplier)
|
|
return -ERANGE;
|
|
|
|
k = (nsec_t) l * multiplier;
|
|
if (k >= NSEC_INFINITY - r)
|
|
return -ERANGE;
|
|
|
|
r += k;
|
|
|
|
something = true;
|
|
|
|
if (*e == '.') {
|
|
nsec_t m = multiplier / 10;
|
|
const char *b;
|
|
|
|
for (b = e + 1; *b >= '0' && *b <= '9'; b++, m /= 10) {
|
|
k = (nsec_t) (*b - '0') * m;
|
|
if (k >= NSEC_INFINITY - r)
|
|
return -ERANGE;
|
|
|
|
r += k;
|
|
}
|
|
|
|
/* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge"*/
|
|
if (b == e + 1)
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
*nsec = r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool ntp_synced(void) {
|
|
struct timex txc = {};
|
|
|
|
if (adjtimex(&txc) < 0)
|
|
return false;
|
|
|
|
/* Consider the system clock synchronized if the reported maximum error is smaller than the maximum
|
|
* value (16 seconds). Ignore the STA_UNSYNC flag as it may have been set to prevent the kernel from
|
|
* touching the RTC. */
|
|
if (txc.maxerror >= 16000000)
|
|
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;
|
|
int r;
|
|
|
|
assert(ret);
|
|
|
|
zones = strv_new("UTC");
|
|
if (!zones)
|
|
return -ENOMEM;
|
|
|
|
n_allocated = 2;
|
|
n_zones = 1;
|
|
|
|
f = fopen("/usr/share/zoneinfo/zone1970.tab", "re");
|
|
if (f) {
|
|
for (;;) {
|
|
_cleanup_free_ char *line = NULL;
|
|
char *p, *w;
|
|
size_t k;
|
|
|
|
r = read_line(f, LONG_LINE_MAX, &line);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
|
|
p = strstrip(line);
|
|
|
|
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);
|
|
strv_uniq(zones);
|
|
|
|
} else if (errno != ENOENT)
|
|
return -errno;
|
|
|
|
*ret = TAKE_PTR(zones);
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool timezone_is_valid(const char *name, int log_level) {
|
|
bool slash = false;
|
|
const char *p, *t;
|
|
_cleanup_close_ int fd = -1;
|
|
char buf[4];
|
|
int r;
|
|
|
|
if (isempty(name))
|
|
return false;
|
|
|
|
/* Always accept "UTC" as valid timezone, since it's the fallback, even if user has no timezones installed. */
|
|
if (streq(name, "UTC"))
|
|
return true;
|
|
|
|
if (name[0] == '/')
|
|
return false;
|
|
|
|
for (p = name; *p; p++) {
|
|
if (!(*p >= '0' && *p <= '9') &&
|
|
!(*p >= 'a' && *p <= 'z') &&
|
|
!(*p >= 'A' && *p <= 'Z') &&
|
|
!IN_SET(*p, '-', '_', '+', '/'))
|
|
return false;
|
|
|
|
if (*p == '/') {
|
|
|
|
if (slash)
|
|
return false;
|
|
|
|
slash = true;
|
|
} else
|
|
slash = false;
|
|
}
|
|
|
|
if (slash)
|
|
return false;
|
|
|
|
if (p - name >= PATH_MAX)
|
|
return false;
|
|
|
|
t = strjoina("/usr/share/zoneinfo/", name);
|
|
|
|
fd = open(t, O_RDONLY|O_CLOEXEC);
|
|
if (fd < 0) {
|
|
log_full_errno(log_level, errno, "Failed to open timezone file '%s': %m", t);
|
|
return false;
|
|
}
|
|
|
|
r = fd_verify_regular(fd);
|
|
if (r < 0) {
|
|
log_full_errno(log_level, r, "Timezone file '%s' is not a regular file: %m", t);
|
|
return false;
|
|
}
|
|
|
|
r = loop_read_exact(fd, buf, 4, false);
|
|
if (r < 0) {
|
|
log_full_errno(log_level, r, "Failed to read from timezone file '%s': %m", t);
|
|
return false;
|
|
}
|
|
|
|
/* Magic from tzfile(5) */
|
|
if (memcmp(buf, "TZif", 4) != 0) {
|
|
log_full(log_level, "Timezone file '%s' has wrong magic bytes", t);
|
|
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;
|
|
|
|
_fallthrough_;
|
|
default:
|
|
/* For everything else, check properly */
|
|
return clock_gettime(clock, &ts) >= 0;
|
|
}
|
|
}
|
|
|
|
int get_timezone(char **ret) {
|
|
_cleanup_free_ char *t = NULL;
|
|
const char *e;
|
|
char *z;
|
|
int r;
|
|
|
|
r = readlink_malloc("/etc/localtime", &t);
|
|
if (r == -ENOENT) {
|
|
/* If the symlink does not exist, assume "UTC", like glibc does*/
|
|
z = strdup("UTC");
|
|
if (!z)
|
|
return -ENOMEM;
|
|
|
|
*ret = z;
|
|
return 0;
|
|
}
|
|
if (r < 0)
|
|
return r; /* returns EINVAL if not a symlink */
|
|
|
|
e = PATH_STARTSWITH_SET(t, "/usr/share/zoneinfo/", "../usr/share/zoneinfo/");
|
|
if (!e)
|
|
return -EINVAL;
|
|
|
|
if (!timezone_is_valid(e, LOG_DEBUG))
|
|
return -EINVAL;
|
|
|
|
z = strdup(e);
|
|
if (!z)
|
|
return -ENOMEM;
|
|
|
|
*ret = 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);
|
|
}
|
|
|
|
static uint32_t sysconf_clock_ticks_cached(void) {
|
|
static thread_local uint32_t hz = 0;
|
|
long r;
|
|
|
|
if (hz == 0) {
|
|
r = sysconf(_SC_CLK_TCK);
|
|
|
|
assert(r > 0);
|
|
hz = r;
|
|
}
|
|
|
|
return hz;
|
|
}
|
|
|
|
uint32_t usec_to_jiffies(usec_t u) {
|
|
uint32_t hz = sysconf_clock_ticks_cached();
|
|
return DIV_ROUND_UP(u, USEC_PER_SEC / hz);
|
|
}
|
|
|
|
usec_t jiffies_to_usec(uint32_t j) {
|
|
uint32_t hz = sysconf_clock_ticks_cached();
|
|
return DIV_ROUND_UP(j * USEC_PER_SEC, hz);
|
|
}
|
|
|
|
usec_t usec_shift_clock(usec_t x, clockid_t from, clockid_t to) {
|
|
usec_t a, b;
|
|
|
|
if (x == USEC_INFINITY)
|
|
return USEC_INFINITY;
|
|
if (map_clock_id(from) == map_clock_id(to))
|
|
return x;
|
|
|
|
a = now(from);
|
|
b = now(to);
|
|
|
|
if (x > a)
|
|
/* x lies in the future */
|
|
return usec_add(b, usec_sub_unsigned(x, a));
|
|
else
|
|
/* x lies in the past */
|
|
return usec_sub_unsigned(b, usec_sub_unsigned(a, x));
|
|
}
|
|
|
|
bool in_utc_timezone(void) {
|
|
tzset();
|
|
|
|
return timezone == 0 && daylight == 0;
|
|
}
|
|
|
|
int time_change_fd(void) {
|
|
|
|
/* We only care for the cancellation event, hence we set the timeout to the latest possible value. */
|
|
static const struct itimerspec its = {
|
|
.it_value.tv_sec = TIME_T_MAX,
|
|
};
|
|
|
|
_cleanup_close_ int fd;
|
|
|
|
assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));
|
|
|
|
/* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever CLOCK_REALTIME makes a jump relative to
|
|
* CLOCK_MONOTONIC. */
|
|
|
|
fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
|
|
if (fd < 0)
|
|
return -errno;
|
|
|
|
if (timerfd_settime(fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) >= 0)
|
|
return TAKE_FD(fd);
|
|
|
|
/* So apparently there are systems where time_t is 64bit, but the kernel actually doesn't support
|
|
* 64bit time_t. In that case configuring a timer to TIME_T_MAX will fail with EOPNOTSUPP or a
|
|
* similar error. If that's the case let's try with INT32_MAX instead, maybe that works. It's a bit
|
|
* of a black magic thing though, but what can we do?
|
|
*
|
|
* We don't want this code on x86-64, hence let's conditionalize this for systems with 64bit time_t
|
|
* but where "long" is shorter than 64bit, i.e. 32bit archs.
|
|
*
|
|
* See: https://github.com/systemd/systemd/issues/14362 */
|
|
|
|
#if SIZEOF_TIME_T == 8 && ULONG_MAX < UINT64_MAX
|
|
if (ERRNO_IS_NOT_SUPPORTED(errno) || errno == EOVERFLOW) {
|
|
static const struct itimerspec its32 = {
|
|
.it_value.tv_sec = INT32_MAX,
|
|
};
|
|
|
|
if (timerfd_settime(fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its32, NULL) >= 0)
|
|
return TAKE_FD(fd);
|
|
}
|
|
#endif
|
|
|
|
return -errno;
|
|
}
|
|
|
|
static const char* const timestamp_style_table[_TIMESTAMP_STYLE_MAX] = {
|
|
[TIMESTAMP_PRETTY] = "pretty",
|
|
[TIMESTAMP_US] = "us",
|
|
[TIMESTAMP_UTC] = "utc",
|
|
[TIMESTAMP_US_UTC] = "us+utc",
|
|
};
|
|
|
|
/* Use the macro for enum → string to allow for aliases */
|
|
_DEFINE_STRING_TABLE_LOOKUP_TO_STRING(timestamp_style, TimestampStyle,);
|
|
|
|
/* For the string → enum mapping we use the generic implementation, but also support two aliases */
|
|
TimestampStyle timestamp_style_from_string(const char *s) {
|
|
TimestampStyle t;
|
|
|
|
t = (TimestampStyle) string_table_lookup(timestamp_style_table, ELEMENTSOF(timestamp_style_table), s);
|
|
if (t >= 0)
|
|
return t;
|
|
if (streq_ptr(s, "µs"))
|
|
return TIMESTAMP_US;
|
|
if (streq_ptr(s, "µs+utc"))
|
|
return TIMESTAMP_US_UTC;
|
|
return t;
|
|
}
|