fdo-mirrors/NetworkManager
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git synced 2025-12-25 11:50:14 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
NetworkManager/src/libnm-systemd-shared/src/basic/time-util.c
Fernando Fernandez Mancera e59dce9488 merge: branch 'systemd' into ff/sync_systemd
2024-04-19 18:16:22 +02:00

1781 lines
56 KiB
C
Raw Blame History

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "nm-sd-adapt-shared.h"
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/timerfd.h>
#include <sys/types.h>
#include <unistd.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "io-util.h"
#include "log.h"
#include "macro.h"
#include "missing_threads.h"
#include "missing_timerfd.h"
#include "parse-util.h"
#include "path-util.h"
#include "process-util.h"
#include "stat-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "time-util.h"
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_now(dual_timestamp *ts) {
assert(ts);
ts->realtime = now(CLOCK_REALTIME);
ts->monotonic = now(CLOCK_MONOTONIC);
return ts;
}
triple_timestamp* triple_timestamp_now(triple_timestamp *ts) {
assert(ts);
ts->realtime = now(CLOCK_REALTIME);
ts->monotonic = now(CLOCK_MONOTONIC);
ts->boottime = now(CLOCK_BOOTTIME);
return ts;
}
static usec_t map_clock_usec_internal(usec_t from, usec_t from_base, usec_t to_base) {
/* Maps the time 'from' between two clocks, based on a common reference point where the first clock
* is at 'from_base' and the second clock at 'to_base'. Basically calculates:
*
* from - from_base + to_base
*
* But takes care of overflows/underflows and avoids signed operations. */
if (from >= from_base) { /* In the future */
usec_t delta = from - from_base;
if (to_base >= USEC_INFINITY - delta) /* overflow? */
return USEC_INFINITY;
return to_base + delta;
} else { /* In the past */
usec_t delta = from_base - from;
if (to_base <= delta) /* underflow? */
return 0;
return to_base - delta;
}
}
usec_t map_clock_usec(usec_t from, clockid_t from_clock, clockid_t to_clock) {
/* Try to avoid any inaccuracy needlessly added in case we convert from effectively the same clock
* onto itself */
if (map_clock_id(from_clock) == map_clock_id(to_clock))
return from;
/* Keep infinity as is */
if (from == USEC_INFINITY)
return from;
return map_clock_usec_internal(from, now(from_clock), now(to_clock));
}
dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
assert(ts);
if (!timestamp_is_set(u)) {
ts->realtime = ts->monotonic = u;
return ts;
}
ts->realtime = u;
ts->monotonic = map_clock_usec(u, CLOCK_REALTIME, CLOCK_MONOTONIC);
return ts;
}
triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) {
usec_t nowr;
assert(ts);
if (!timestamp_is_set(u)) {
ts->realtime = ts->monotonic = ts->boottime = u;
return ts;
}
nowr = now(CLOCK_REALTIME);
ts->realtime = u;
ts->monotonic = map_clock_usec_internal(u, nowr, now(CLOCK_MONOTONIC));
ts->boottime = map_clock_usec_internal(u, nowr, now(CLOCK_BOOTTIME));
return ts;
}
triple_timestamp* triple_timestamp_from_boottime(triple_timestamp *ts, usec_t u) {
usec_t nowb;
assert(ts);
if (u == USEC_INFINITY) {
ts->realtime = ts->monotonic = ts->boottime = u;
return ts;
}
nowb = now(CLOCK_BOOTTIME);
ts->boottime = u;
ts->monotonic = map_clock_usec_internal(u, nowb, now(CLOCK_MONOTONIC));
ts->realtime = map_clock_usec_internal(u, nowb, now(CLOCK_REALTIME));
return ts;
}
dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) {
assert(ts);
if (u == USEC_INFINITY) {
ts->realtime = ts->monotonic = USEC_INFINITY;
return ts;
}
ts->monotonic = u;
ts->realtime = map_clock_usec(u, CLOCK_MONOTONIC, CLOCK_REALTIME);
return ts;
}
dual_timestamp* dual_timestamp_from_boottime(dual_timestamp *ts, usec_t u) {
usec_t nowm;
assert(ts);
if (u == USEC_INFINITY) {
ts->realtime = ts->monotonic = USEC_INFINITY;
return ts;
}
nowm = now(CLOCK_BOOTTIME);
ts->monotonic = map_clock_usec_internal(u, nowm, now(CLOCK_MONOTONIC));
ts->realtime = map_clock_usec_internal(u, nowm, now(CLOCK_REALTIME));
return ts;
}
usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) {
assert(ts);
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 < 0 || ts->tv_nsec < 0)
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;
}
nsec_t timespec_load_nsec(const struct timespec *ts) {
assert(ts);
if (ts->tv_sec < 0 || ts->tv_nsec < 0)
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 ||
u / USEC_PER_SEC >= TIME_T_MAX) {
ts->tv_sec = (time_t) -1;
ts->tv_nsec = -1L;
return ts;
}
ts->tv_sec = (time_t) (u / USEC_PER_SEC);
ts->tv_nsec = (long) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
return ts;
}
struct timespec *timespec_store_nsec(struct timespec *ts, nsec_t n) {
assert(ts);
if (n == NSEC_INFINITY ||
n / NSEC_PER_SEC >= TIME_T_MAX) {
ts->tv_sec = (time_t) -1;
ts->tv_nsec = -1L;
return ts;
}
ts->tv_sec = (time_t) (n / NSEC_PER_SEC);
ts->tv_nsec = (long) (n % NSEC_PER_SEC);
return ts;
}
usec_t timeval_load(const struct timeval *tv) {
assert(tv);
if (tv->tv_sec < 0 || tv->tv_usec < 0)
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;
}
#if 0 /* NM_IGNORED */
struct timeval *timeval_store(struct timeval *tv, usec_t u) {
assert(tv);
if (u == USEC_INFINITY ||
u / USEC_PER_SEC > TIME_T_MAX) {
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;
}
char *format_timestamp_style(
char *buf,
size_t l,
usec_t t,
TimestampStyle style) {
/* The weekdays in non-localized (English) form. We use this instead of the localized form, so that
* our generated timestamps may be parsed with parse_timestamp(), and always read the same. */
static const char * const weekdays[] = {
[0] = "Sun",
[1] = "Mon",
[2] = "Tue",
[3] = "Wed",
[4] = "Thu",
[5] = "Fri",
[6] = "Sat",
};
struct tm tm;
bool utc, us;
time_t sec;
size_t n;
assert(buf);
assert(style >= 0);
assert(style < _TIMESTAMP_STYLE_MAX);
if (!timestamp_is_set(t))
return NULL; /* Timestamp is unset */
if (style == TIMESTAMP_UNIX) {
if (l < (size_t) (1 + 1 + 1))
return NULL; /* not enough space for even the shortest of forms */
return snprintf_ok(buf, l, "@" USEC_FMT, t / USEC_PER_SEC); /* round down μs → s */
}
utc = IN_SET(style, TIMESTAMP_UTC, TIMESTAMP_US_UTC, TIMESTAMP_DATE);
us = IN_SET(style, TIMESTAMP_US, TIMESTAMP_US_UTC);
if (l < (size_t) (3 + /* week day */
1 + 10 + /* space and date */
style == TIMESTAMP_DATE ? 0 :
(1 + 8 + /* space and time */
(us ? 1 + 6 : 0) + /* "." and microsecond part */
1 + (utc ? 3 : 1)) + /* space and shortest possible zone */
1))
return NULL; /* Not enough space even for the shortest form. */
/* Let's not format times with years > 9999 */
if (t > USEC_TIMESTAMP_FORMATTABLE_MAX) {
static const char* const xxx[_TIMESTAMP_STYLE_MAX] = {
[TIMESTAMP_PRETTY] = "--- XXXX-XX-XX XX:XX:XX",
[TIMESTAMP_US] = "--- XXXX-XX-XX XX:XX:XX.XXXXXX",
[TIMESTAMP_UTC] = "--- XXXX-XX-XX XX:XX:XX UTC",
[TIMESTAMP_US_UTC] = "--- XXXX-XX-XX XX:XX:XX.XXXXXX UTC",
[TIMESTAMP_DATE] = "--- XXXX-XX-XX",
};
assert(l >= strlen(xxx[style]) + 1);
return strcpy(buf, xxx[style]);
}
sec = (time_t) (t / USEC_PER_SEC); /* Round down */
if (!localtime_or_gmtime_r(&sec, &tm, utc))
return NULL;
/* Start with the week day */
assert((size_t) tm.tm_wday < ELEMENTSOF(weekdays));
memcpy(buf, weekdays[tm.tm_wday], 4);
if (style == TIMESTAMP_DATE) {
/* Special format string if only date should be shown. */
if (strftime(buf + 3, l - 3, " %Y-%m-%d", &tm) <= 0)
return NULL; /* Doesn't fit */
return buf;
}
/* Add the main components */
if (strftime(buf + 3, l - 3, " %Y-%m-%d %H:%M:%S", &tm) <= 0)
return NULL; /* Doesn't fit */
/* Append the microseconds part, if that's requested */
if (us) {
n = strlen(buf);
if (n + 8 > l)
return NULL; /* Microseconds part doesn't fit. */
sprintf(buf + n, ".%06"PRI_USEC, t % USEC_PER_SEC);
}
/* Append the timezone */
n = strlen(buf);
if (utc) {
/* If this is UTC then let's explicitly use the "UTC" string here, because gmtime_r()
* normally uses the obsolete "GMT" instead. */
if (n + 5 > l)
return NULL; /* "UTC" doesn't fit. */
strcpy(buf + n, " UTC");
} else if (!isempty(tm.tm_zone)) {
size_t tn;
/* An explicit timezone is specified, let's use it, if it fits */
tn = strlen(tm.tm_zone);
if (n + 1 + tn + 1 > l) {
/* The full time zone does not fit in. Yuck. */
if (n + 1 + _POSIX_TZNAME_MAX + 1 > l)
return NULL; /* Not even enough space for the POSIX minimum (of 6)? In that
* case, complain that it doesn't fit. */
/* So the time zone doesn't fit in fully, but the caller passed enough space for the
* POSIX minimum time zone length. In this case suppress the timezone entirely, in
* order not to dump an overly long, hard to read string on the user. This should be
* safe, because the user will assume the local timezone anyway if none is shown. And
* so does parse_timestamp(). */
} else {
buf[n++] = ' ';
strcpy(buf + n, tm.tm_zone);
}
}
return buf;
}
char* format_timestamp_relative_full(char *buf, size_t l, usec_t t, clockid_t clock, bool implicit_left) {
const char *s;
usec_t n, d;
assert(buf);
if (!timestamp_is_set(t))
return NULL;
n = now(clock);
if (n > t) {
d = n - t;
s = " ago";
} else {
d = t - n;
s = implicit_left ? "" : " left";
}
if (d >= USEC_PER_YEAR) {
usec_t years = d / USEC_PER_YEAR;
usec_t months = (d % USEC_PER_YEAR) / USEC_PER_MONTH;
(void) snprintf(buf, l, USEC_FMT " %s " USEC_FMT " %s%s",
years,
years == 1 ? "year" : "years",
months,
months == 1 ? "month" : "months",
s);
} else if (d >= USEC_PER_MONTH) {
usec_t months = d / USEC_PER_MONTH;
usec_t days = (d % USEC_PER_MONTH) / USEC_PER_DAY;
(void) snprintf(buf, l, USEC_FMT " %s " USEC_FMT " %s%s",
months,
months == 1 ? "month" : "months",
days,
days == 1 ? "day" : "days",
s);
} else if (d >= USEC_PER_WEEK) {
usec_t weeks = d / USEC_PER_WEEK;
usec_t days = (d % USEC_PER_WEEK) / USEC_PER_DAY;
(void) snprintf(buf, l, USEC_FMT " %s " USEC_FMT " %s%s",
weeks,
weeks == 1 ? "week" : "weeks",
days,
days == 1 ? "day" : "days",
s);
} else if (d >= 2*USEC_PER_DAY)
(void) snprintf(buf, l, USEC_FMT " days%s", d / USEC_PER_DAY,s);
else if (d >= 25*USEC_PER_HOUR)
(void) snprintf(buf, l, "1 day " USEC_FMT "h%s",
(d - USEC_PER_DAY) / USEC_PER_HOUR, s);
else if (d >= 6*USEC_PER_HOUR)
(void) snprintf(buf, l, USEC_FMT "h%s",
d / USEC_PER_HOUR, s);
else if (d >= USEC_PER_HOUR)
(void) 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)
(void) snprintf(buf, l, USEC_FMT "min%s",
d / USEC_PER_MINUTE, s);
else if (d >= USEC_PER_MINUTE)
(void) 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)
(void) snprintf(buf, l, USEC_FMT "s%s",
d / USEC_PER_SEC, s);
else if (d >= USEC_PER_MSEC)
(void) snprintf(buf, l, USEC_FMT "ms%s",
d / USEC_PER_MSEC, s);
else if (d > 0)
(void) snprintf(buf, l, USEC_FMT"us%s",
d, s);
else
(void) snprintf(buf, l, "now");
buf[l-1] = 0;
return buf;
}
#endif /* NM_IGNORED */
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 },
};
char *p = ASSERT_PTR(buf);
bool something = false;
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 (size_t 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) {
signed char j = 0;
for (usec_t cc = table[i].usec; cc > 1; cc /= 10)
j++;
for (usec_t 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-1);
l -= n;
p += n;
something = true;
}
*p = 0;
return buf;
}
#if 0 /* NM_IGNORED */
static int parse_timestamp_impl(
const char *t,
size_t max_len,
bool utc,
int isdst,
long gmtoff,
usec_t *ret) {
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 },
};
_cleanup_free_ char *t_alloc = NULL;
usec_t usec, plus = 0, minus = 0;
bool with_tz = false;
int r, weekday = -1;
unsigned fractional = 0;
const char *k;
struct tm tm, copy;
time_t sec;
/* Allowed syntaxes:
*
* 2012-09-22 16:34:22.1[2[3[4[5[6]]]]]
* 2012-09-22 16:34:22 (µsec will be set to 0)
* 2012-09-22 16:34 (seconds will be set to 0)
* 2012-09-22T16:34:22.1[2[3[4[5[6]]]]]
* 2012-09-22T16:34:22 (µsec will be set to 0)
* 2012-09-22T16:34 (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)
*
* Note, on DST change, 00:00:00 may not exist and in that case the time part may be shifted.
* E.g. "Sun 2023-03-13 America/Havana" is parsed as "Sun 2023-03-13 01:00:00 CDT".
*
* A simplified strptime-spelled RFC3339 ABNF looks like
* "%Y-%m-%d" "T" "%H" ":" "%M" ":" "%S" [".%N"] ("Z" / (("+" / "-") "%H:%M"))
* We additionally allow no seconds and inherited timezone
* for symmetry with our other syntaxes and improved interactive usability:
* "%Y-%m-%d" "T" "%H" ":" "%M" ":" ["%S" [".%N"]] ["Z" / (("+" / "-") "%H:%M")]
* RFC3339 defines time-secfrac to as "." 1*DIGIT, but we limit to 6 digits,
* since we're limited to 1µs resolution.
* We also accept "Sat 2012-09-22T16:34:22", RFC3339 warns against it.
*/
assert(t);
if (max_len != SIZE_MAX) {
/* If the input string contains timezone, then cut it here. */
if (max_len == 0) /* Can't be the only field */
return -EINVAL;
t_alloc = strndup(t, max_len);
if (!t_alloc)
return -ENOMEM;
t = t_alloc;
with_tz = true;
}
if (utc) {
/* glibc accepts gmtoff more than 24 hours, but we refuse it. */
if ((usec_t) labs(gmtoff) * USEC_PER_SEC > USEC_PER_DAY)
return -EINVAL;
} else {
if (gmtoff != 0)
return -EINVAL;
}
if (t[0] == '@' && !with_tz)
return parse_sec(t + 1, ret);
usec = now(CLOCK_REALTIME);
if (!with_tz) {
if (streq(t, "now"))
goto finish;
if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
goto finish;
}
if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
goto finish;
}
if ((k = endswith(t, " ago"))) {
_cleanup_free_ char *buf = NULL;
buf = strndup(t, k - t);
if (!buf)
return -ENOMEM;
r = parse_sec(buf, &minus);
if (r < 0)
return r;
goto finish;
}
if ((k = endswith(t, " left"))) {
_cleanup_free_ char *buf = NULL;
buf = strndup(t, k - t);
if (!buf)
return -ENOMEM;
r = parse_sec(buf, &plus);
if (r < 0)
return r;
goto finish;
}
}
sec = (time_t) (usec / USEC_PER_SEC);
if (!localtime_or_gmtime_r(&sec, &tm, utc))
return -EINVAL;
tm.tm_isdst = isdst;
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 (size_t i = 0; i < ELEMENTSOF(day_nr); i++) {
k = startswith_no_case(t, day_nr[i].name);
if (!k || *k != ' ')
continue;
weekday = day_nr[i].nr;
t = k + 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;
}
/* Our "canonical" RFC3339 syntax variant */
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;
}
/* RFC3339 syntax */
tm = copy;
k = strptime(t, "%Y-%m-%dT%H:%M:%S", &tm);
if (k) {
if (*k == '.')
goto parse_usec;
else if (*k == 0)
goto from_tm;
}
/* Support OUTPUT_SHORT and OUTPUT_SHORT_PRECISE formats */
tm = copy;
k = strptime(t, "%b %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;
}
/* Our "canonical" RFC3339 syntax variant without seconds */
tm = copy;
k = strptime(t, "%Y-%m-%d %H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
goto from_tm;
}
/* RFC3339 syntax without seconds */
tm = copy;
k = strptime(t, "%Y-%m-%dT%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:
k++;
r = parse_fractional_part_u(&k, 6, &fractional);
if (r < 0)
return -EINVAL;
if (*k != '\0')
return -EINVAL;
from_tm:
assert(plus == 0);
assert(minus == 0);
if (weekday >= 0 && tm.tm_wday != weekday)
return -EINVAL;
if (gmtoff < 0) {
plus = -gmtoff * USEC_PER_SEC;
/* If gmtoff is negative, the string may be too old to be parsed as UTC.
* E.g. 1969-12-31 23:00:00 -06 == 1970-01-01 05:00:00 UTC
* We assumed that gmtoff is in the range of -24:00…+24:00, hence the only date we need to
* handle here is 1969-12-31. So, let's shift the date with one day, then subtract the shift
* later. */
if (tm.tm_year == 69 && tm.tm_mon == 11 && tm.tm_mday == 31) {
/* Thu 1970-01-01-00:00:00 */
tm.tm_year = 70;
tm.tm_mon = 0;
tm.tm_mday = 1;
tm.tm_wday = 4;
tm.tm_yday = 0;
minus = USEC_PER_DAY;
}
} else
minus = gmtoff * USEC_PER_SEC;
sec = mktime_or_timegm(&tm, utc);
if (sec < 0)
return -EINVAL;
usec = usec_add(sec * USEC_PER_SEC, fractional);
finish:
usec = usec_add(usec, plus);
if (usec < minus)
return -EINVAL;
usec = usec_sub_unsigned(usec, minus);
if (usec > USEC_TIMESTAMP_FORMATTABLE_MAX)
return -EINVAL;
if (ret)
*ret = usec;
return 0;
}
static int parse_timestamp_maybe_with_tz(const char *t, size_t tz_offset, bool valid_tz, usec_t *ret) {
assert(t);
tzset();
for (int j = 0; j <= 1; j++) {
if (isempty(tzname[j]))
continue;
if (!streq(t + tz_offset, tzname[j]))
continue;
/* The specified timezone matches tzname[] of the local timezone. */
return parse_timestamp_impl(t, tz_offset - 1, /* utc = */ false, /* isdst = */ j, /* gmtoff = */ 0, ret);
}
/* If we know that the last word is a valid timezone (e.g. Asia/Tokyo), then simply drop the timezone
* and parse the remaining string as a local time. If we know that the last word is not a timezone,
* then assume that it is a part of the time and try to parse the whole string as a local time. */
return parse_timestamp_impl(t, valid_tz ? tz_offset - 1 : SIZE_MAX,
/* utc = */ false, /* isdst = */ -1, /* gmtoff = */ 0, ret);
}
typedef struct ParseTimestampResult {
usec_t usec;
int return_value;
} ParseTimestampResult;
int parse_timestamp(const char *t, usec_t *ret) {
ParseTimestampResult *shared, tmp;
const char *k, *tz, *current_tz;
size_t max_len, t_len;
struct tm tm;
int r;
assert(t);
t_len = strlen(t);
if (t_len > 2 && t[t_len - 1] == 'Z' && t[t_len - 2] != ' ') /* RFC3339-style welded UTC: "1985-04-12T23:20:50.52Z" */
return parse_timestamp_impl(t, t_len - 1, /* utc = */ true, /* isdst = */ -1, /* gmtoff = */ 0, ret);
if (t_len > 7 && IN_SET(t[t_len - 6], '+', '-') && t[t_len - 7] != ' ') { /* RFC3339-style welded offset: "1990-12-31T15:59:60-08:00" */
k = strptime(&t[t_len - 6], "%z", &tm);
if (k && *k == '\0')
return parse_timestamp_impl(t, t_len - 6, /* utc = */ true, /* isdst = */ -1, /* gmtoff = */ tm.tm_gmtoff, ret);
}
tz = strrchr(t, ' ');
if (!tz)
return parse_timestamp_impl(t, /* max_len = */ SIZE_MAX, /* utc = */ false, /* isdst = */ -1, /* gmtoff = */ 0, ret);
max_len = tz - t;
tz++;
/* Shortcut, parse the string as UTC. */
if (streq(tz, "UTC"))
return parse_timestamp_impl(t, max_len, /* utc = */ true, /* isdst = */ -1, /* gmtoff = */ 0, ret);
/* If the timezone is compatible with RFC-822/ISO 8601 (e.g. +06, or -03:00) then parse the string as
* UTC and shift the result. Note, this must be earlier than the timezone check with tzname[], as
* tzname[] may be in the same format. */
k = strptime(tz, "%z", &tm);
if (k && *k == '\0')
return parse_timestamp_impl(t, max_len, /* utc = */ true, /* isdst = */ -1, /* gmtoff = */ tm.tm_gmtoff, ret);
/* If the last word is not a timezone file (e.g. Asia/Tokyo), then let's check if it matches
* tzname[] of the local timezone, e.g. JST or CEST. */
if (!timezone_is_valid(tz, LOG_DEBUG))
return parse_timestamp_maybe_with_tz(t, tz - t, /* valid_tz = */ false, ret);
/* Shortcut. If the current $TZ is equivalent to the specified timezone, it is not necessary to fork
* the process. */
current_tz = getenv("TZ");
if (current_tz && *current_tz == ':' && streq(current_tz + 1, tz))
return parse_timestamp_maybe_with_tz(t, tz - t, /* valid_tz = */ true, ret);
/* Otherwise, to avoid polluting the current environment variables, let's fork the process and set
* the specified timezone in the child process. */
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_SIGKILL|FORK_WAIT, NULL);
if (r < 0) {
(void) munmap(shared, sizeof *shared);
return r;
}
if (r == 0) {
const 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);
}
shared->return_value = parse_timestamp_maybe_with_tz(t, tz - t, /* valid_tz = */ true, &shared->usec);
_exit(EXIT_SUCCESS);
}
tmp = *shared;
if (munmap(shared, sizeof *shared) != 0)
return negative_errno();
if (tmp.return_value == 0 && ret)
*ret = tmp.usec;
return tmp.return_value;
}
static const char* extract_multiplier(const char *p, usec_t *ret) {
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 }, /* U+03bc (aka GREEK SMALL LETTER MU) */
{ "µs", 1ULL }, /* U+b5 (aka MICRO SIGN) */
};
assert(p);
assert(ret);
for (size_t i = 0; i < ELEMENTSOF(table); i++) {
char *e;
e = startswith(p, table[i].suffix);
if (e) {
*ret = table[i].usec;
return e;
}
}
return p;
}
int parse_time(const char *t, usec_t *ret, usec_t default_unit) {
const char *p, *s;
usec_t usec = 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 (ret)
*ret = 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 - usec)
return -ERANGE;
usec += 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 - usec)
return -ERANGE;
usec += k;
}
/* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge" */
if (b == e + 1)
return -EINVAL;
}
}
if (ret)
*ret = usec;
return 0;
}
int parse_sec(const char *t, usec_t *ret) {
return parse_time(t, ret, 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) {
assert(t);
assert(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 *ret) {
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 }, /* U+03bc (aka GREEK LETTER MU) */
{ "µs", NSEC_PER_USEC }, /* U+b5 (aka MICRO SIGN) */
{ "nsec", 1ULL },
{ "ns", 1ULL },
{ "", 1ULL }, /* default is nsec */
};
size_t i;
assert(p);
assert(ret);
for (i = 0; i < ELEMENTSOF(table); i++) {
char *e;
e = startswith(p, table[i].suffix);
if (e) {
*ret = table[i].nsec;
return e;
}
}
return p;
}
int parse_nsec(const char *t, nsec_t *ret) {
const char *p, *s;
nsec_t nsec = 0;
bool something = false;
assert(t);
assert(ret);
p = t;
p += strspn(p, WHITESPACE);
s = startswith(p, "infinity");
if (s) {
s += strspn(s, WHITESPACE);
if (*s != 0)
return -EINVAL;
*ret = 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 - nsec)
return -ERANGE;
nsec += 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 - nsec)
return -ERANGE;
nsec += k;
}
/* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge" */
if (b == e + 1)
return -EINVAL;
}
}
*ret = nsec;
return 0;
}
static int get_timezones_from_zone1970_tab(char ***ret) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **zones = NULL;
int r;
assert(ret);
f = fopen("/usr/share/zoneinfo/zone1970.tab", "re");
if (!f)
return -errno;
for (;;) {
_cleanup_free_ char *line = NULL, *cc = NULL, *co = NULL, *tz = NULL;
r = read_line(f, LONG_LINE_MAX, &line);
if (r < 0)
return r;
if (r == 0)
break;
const char *p = line;
/* Line format is:
* 'country codes' 'coordinates' 'timezone' 'comments' */
r = extract_many_words(&p, NULL, 0, &cc, &co, &tz);
if (r < 0)
continue;
/* Lines that start with # are comments. */
if (*cc == '#')
continue;
r = strv_extend(&zones, tz);
if (r < 0)
return r;
}
*ret = TAKE_PTR(zones);
return 0;
}
static int get_timezones_from_tzdata_zi(char ***ret) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **zones = NULL;
int r;
assert(ret);
f = fopen("/usr/share/zoneinfo/tzdata.zi", "re");
if (!f)
return -errno;
for (;;) {
_cleanup_free_ char *line = NULL, *type = NULL, *f1 = NULL, *f2 = NULL;
r = read_line(f, LONG_LINE_MAX, &line);
if (r < 0)
return r;
if (r == 0)
break;
const char *p = line;
/* The only lines we care about are Zone and Link lines.
* Zone line format is:
* 'Zone' 'timezone' ...
* Link line format is:
* 'Link' 'target' 'alias'
* See 'man zic' for more detail. */
r = extract_many_words(&p, NULL, 0, &type, &f1, &f2);
if (r < 0)
continue;
char *tz;
if (IN_SET(*type, 'Z', 'z'))
/* Zone lines have timezone in field 1. */
tz = f1;
else if (IN_SET(*type, 'L', 'l'))
/* Link lines have timezone in field 2. */
tz = f2;
else
/* Not a line we care about. */
continue;
r = strv_extend(&zones, tz);
if (r < 0)
return r;
}
*ret = TAKE_PTR(zones);
return 0;
}
int get_timezones(char ***ret) {
_cleanup_strv_free_ char **zones = NULL;
int r;
assert(ret);
r = get_timezones_from_tzdata_zi(&zones);
if (r == -ENOENT) {
log_debug_errno(r, "Could not get timezone data from tzdata.zi, using zone1970.tab: %m");
r = get_timezones_from_zone1970_tab(&zones);
if (r == -ENOENT)
log_debug_errno(r, "Could not get timezone data from zone1970.tab, using UTC: %m");
}
if (r < 0 && r != -ENOENT)
return r;
/* Always include UTC */
r = strv_extend(&zones, "UTC");
if (r < 0)
return r;
strv_sort(zones);
strv_uniq(zones);
*ret = TAKE_PTR(zones);
return 0;
}
#endif /* NM_IGNORED */
int verify_timezone(const char *name, int log_level) {
bool slash = false;
const char *p, *t;
_cleanup_close_ int fd = -EBADF;
char buf[4];
int r;
if (isempty(name))
return -EINVAL;
/* Always accept "UTC" as valid timezone, since it's the fallback, even if user has no timezones installed. */
if (streq(name, "UTC"))
return 0;
if (name[0] == '/')
return -EINVAL;
for (p = name; *p; p++) {
if (!ascii_isdigit(*p) &&
!ascii_isalpha(*p) &&
!IN_SET(*p, '-', '_', '+', '/'))
return -EINVAL;
if (*p == '/') {
if (slash)
return -EINVAL;
slash = true;
} else
slash = false;
}
if (slash)
return -EINVAL;
if (p - name >= PATH_MAX)
return -ENAMETOOLONG;
t = strjoina("/usr/share/zoneinfo/", name);
fd = open(t, O_RDONLY|O_CLOEXEC);
if (fd < 0)
return log_full_errno(log_level, errno, "Failed to open timezone file '%s': %m", t);
r = fd_verify_regular(fd);
if (r < 0)
return log_full_errno(log_level, r, "Timezone file '%s' is not a regular file: %m", t);
r = loop_read_exact(fd, buf, 4, false);
if (r < 0)
return log_full_errno(log_level, r, "Failed to read from timezone file '%s': %m", t);
/* Magic from tzfile(5) */
if (memcmp(buf, "TZif", 4) != 0)
return log_full_errno(log_level, SYNTHETIC_ERRNO(EBADMSG),
"Timezone file '%s' has wrong magic bytes", t);
return 0;
}
bool clock_supported(clockid_t clock) {
struct timespec ts;
switch (clock) {
case CLOCK_MONOTONIC:
case CLOCK_REALTIME:
case CLOCK_BOOTTIME:
/* These three are always available in our baseline, and work in timerfd, as of kernel 3.15 */
return true;
default:
/* For everything else, check properly */
return clock_gettime(clock, &ts) >= 0;
}
}
#if 0 /* NM_IGNORED */
int get_timezone(char **ret) {
_cleanup_free_ char *t = NULL;
const char *e;
char *z;
int r;
assert(ret);
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) {
assert(tm);
return utc ? timegm(tm) : mktime(tm);
}
struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc) {
assert(t);
assert(tm);
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 = -EBADF;
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 64-bit, but the kernel actually doesn't support
* 64-bit 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 64-bit time_t
* but where "long" is shorter than 64-bit, i.e. 32-bit 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",
[TIMESTAMP_UNIX] = "unix",
};
/* 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 (STRPTR_IN_SET(s, "µs", "μs")) /* accept both µ symbols in unicode, i.e. micro symbol + Greek small letter mu. */
return TIMESTAMP_US;
if (STRPTR_IN_SET(s, "µs+utc", "μs+utc"))
return TIMESTAMP_US_UTC;
return t;
}
#endif /* NM_IGNORED */
Reference in a new issue View git blame Copy permalink