/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "alloc-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "log.h"
#include "macro.h"
#include "parse-util.h"
#include "path-util.h"
#include "string-util.h"
#include "strv.h"
#include "time-util.h"
static 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);
}
#if 0 /// UNNEEDED by elogind
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);
}
#endif // 0
dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
assert(ts);
ts->realtime = now(CLOCK_REALTIME);
ts->monotonic = now(CLOCK_MONOTONIC);
return ts;
}
triple_timestamp* triple_timestamp_get(triple_timestamp *ts) {
assert(ts);
ts->realtime = now(CLOCK_REALTIME);
ts->monotonic = now(CLOCK_MONOTONIC);
ts->boottime = clock_boottime_supported() ? now(CLOCK_BOOTTIME) : USEC_INFINITY;
return ts;
}
dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
int64_t delta;
assert(ts);
if (u == USEC_INFINITY || u <= 0) {
ts->realtime = ts->monotonic = u;
return ts;
}
ts->realtime = u;
delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta);
return ts;
}
#if 0 /// UNNEEDED by elogind
triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) {
int64_t delta;
assert(ts);
if (u == USEC_INFINITY || u <= 0) {
ts->realtime = ts->monotonic = ts->boottime = u;
return ts;
}
ts->realtime = u;
delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta);
ts->boottime = clock_boottime_supported() ? usec_sub(now(CLOCK_BOOTTIME), delta) : USEC_INFINITY;
return ts;
}
dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) {
int64_t delta;
assert(ts);
if (u == USEC_INFINITY) {
ts->realtime = ts->monotonic = USEC_INFINITY;
return ts;
}
ts->monotonic = u;
delta = (int64_t) now(CLOCK_MONOTONIC) - (int64_t) u;
ts->realtime = usec_sub(now(CLOCK_REALTIME), delta);
return ts;
}
dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u) {
int64_t delta;
if (u == USEC_INFINITY) {
ts->realtime = ts->monotonic = USEC_INFINITY;
return ts;
}
dual_timestamp_get(ts);
delta = (int64_t) now(clock_boottime_or_monotonic()) - (int64_t) u;
ts->realtime = usec_sub(ts->realtime, delta);
ts->monotonic = usec_sub(ts->monotonic, delta);
return ts;
}
#endif // 0
usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) {
switch (clock) {
case CLOCK_REALTIME:
case CLOCK_REALTIME_ALARM:
return ts->realtime;
case CLOCK_MONOTONIC:
return ts->monotonic;
case CLOCK_BOOTTIME:
case CLOCK_BOOTTIME_ALARM:
return ts->boottime;
default:
return USEC_INFINITY;
}
}
usec_t timespec_load(const struct timespec *ts) {
assert(ts);
if (ts->tv_sec == (time_t) -1 && ts->tv_nsec == (long) -1)
return USEC_INFINITY;
if ((usec_t) ts->tv_sec > (UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / USEC_PER_SEC)
return USEC_INFINITY;
return
(usec_t) ts->tv_sec * USEC_PER_SEC +
(usec_t) ts->tv_nsec / NSEC_PER_USEC;
}
#if 0 /// UNNEEDED by elogind
nsec_t timespec_load_nsec(const struct timespec *ts) {
assert(ts);
if (ts->tv_sec == (time_t) -1 && ts->tv_nsec == (long) -1)
return NSEC_INFINITY;
if ((nsec_t) ts->tv_sec >= (UINT64_MAX - ts->tv_nsec) / NSEC_PER_SEC)
return NSEC_INFINITY;
return (nsec_t) ts->tv_sec * NSEC_PER_SEC + (nsec_t) ts->tv_nsec;
}
#endif // 0
struct timespec *timespec_store(struct timespec *ts, usec_t u) {
assert(ts);
if (u == USEC_INFINITY) {
ts->tv_sec = (time_t) -1;
ts->tv_nsec = (long) -1;
return ts;
}
ts->tv_sec = (time_t) (u / USEC_PER_SEC);
ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
return ts;
}
usec_t timeval_load(const struct timeval *tv) {
assert(tv);
if (tv->tv_sec == (time_t) -1 &&
tv->tv_usec == (suseconds_t) -1)
return USEC_INFINITY;
if ((usec_t) tv->tv_sec > (UINT64_MAX - tv->tv_usec) / USEC_PER_SEC)
return USEC_INFINITY;
return
(usec_t) tv->tv_sec * USEC_PER_SEC +
(usec_t) tv->tv_usec;
}
struct timeval *timeval_store(struct timeval *tv, usec_t u) {
assert(tv);
if (u == USEC_INFINITY) {
tv->tv_sec = (time_t) -1;
tv->tv_usec = (suseconds_t) -1;
} else {
tv->tv_sec = (time_t) (u / USEC_PER_SEC);
tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
}
return tv;
}
static char *format_timestamp_internal(
char *buf,
size_t l,
usec_t t,
bool utc,
bool us) {
/* 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;
time_t sec;
size_t n;
assert(buf);
if (l <
3 + /* week day */
1 + 10 + /* space and date */
1 + 8 + /* space and time */
(us ? 1 + 6 : 0) + /* "." and microsecond part */
1 + 1 + /* space and shortest possible zone */
1)
return NULL; /* Not enough space even for the shortest form. */
if (t <= 0 || t == USEC_INFINITY)
return NULL; /* Timestamp is unset */
sec = (time_t) (t / USEC_PER_SEC); /* Round down */
if ((usec_t) sec != (t / USEC_PER_SEC))
return NULL; /* overflow? */
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);
/* 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, ".%06llu", (unsigned long long) (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(char *buf, size_t l, usec_t t) {
return format_timestamp_internal(buf, l, t, false, false);
}
#if 0 /// UNNEEDED by elogind
char *format_timestamp_utc(char *buf, size_t l, usec_t t) {
return format_timestamp_internal(buf, l, t, true, false);
}
#endif // 0
char *format_timestamp_us(char *buf, size_t l, usec_t t) {
return format_timestamp_internal(buf, l, t, false, true);
}
#if 0 /// UNNEEDED by elogind
char *format_timestamp_us_utc(char *buf, size_t l, usec_t t) {
return format_timestamp_internal(buf, l, t, true, true);
}
#endif // 0
char *format_timestamp_relative(char *buf, size_t l, usec_t t) {
const char *s;
usec_t n, d;
if (t <= 0 || t == USEC_INFINITY)
return NULL;
n = now(CLOCK_REALTIME);
if (n > t) {
d = n - t;
s = "ago";
} else {
d = t - n;
s = "left";
}
if (d >= USEC_PER_YEAR)
snprintf(buf, l, USEC_FMT " years " USEC_FMT " months %s",
d / USEC_PER_YEAR,
(d % USEC_PER_YEAR) / USEC_PER_MONTH, s);
else if (d >= USEC_PER_MONTH)
snprintf(buf, l, USEC_FMT " months " USEC_FMT " days %s",
d / USEC_PER_MONTH,
(d % USEC_PER_MONTH) / USEC_PER_DAY, s);
else if (d >= USEC_PER_WEEK)
snprintf(buf, l, USEC_FMT " weeks " USEC_FMT " days %s",
d / USEC_PER_WEEK,
(d % USEC_PER_WEEK) / USEC_PER_DAY, s);
else if (d >= 2*USEC_PER_DAY)
snprintf(buf, l, USEC_FMT " days %s", d / USEC_PER_DAY, s);
else if (d >= 25*USEC_PER_HOUR)
snprintf(buf, l, "1 day " USEC_FMT "h %s",
(d - USEC_PER_DAY) / USEC_PER_HOUR, s);
else if (d >= 6*USEC_PER_HOUR)
snprintf(buf, l, USEC_FMT "h %s",
d / USEC_PER_HOUR, s);
else if (d >= USEC_PER_HOUR)
snprintf(buf, l, USEC_FMT "h " USEC_FMT "min %s",
d / USEC_PER_HOUR,
(d % USEC_PER_HOUR) / USEC_PER_MINUTE, s);
else if (d >= 5*USEC_PER_MINUTE)
snprintf(buf, l, USEC_FMT "min %s",
d / USEC_PER_MINUTE, s);
else if (d >= USEC_PER_MINUTE)
snprintf(buf, l, USEC_FMT "min " USEC_FMT "s %s",
d / USEC_PER_MINUTE,
(d % USEC_PER_MINUTE) / USEC_PER_SEC, s);
else if (d >= USEC_PER_SEC)
snprintf(buf, l, USEC_FMT "s %s",
d / USEC_PER_SEC, s);
else if (d >= USEC_PER_MSEC)
snprintf(buf, l, USEC_FMT "ms %s",
d / USEC_PER_MSEC, s);
else if (d > 0)
snprintf(buf, l, USEC_FMT"us %s",
d, s);
else
snprintf(buf, l, "now");
buf[l-1] = 0;
return buf;
}
char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy) {
static const struct {
const char *suffix;
usec_t usec;
} table[] = {
{ "y", USEC_PER_YEAR },
{ "month", USEC_PER_MONTH },
{ "w", USEC_PER_WEEK },
{ "d", USEC_PER_DAY },
{ "h", USEC_PER_HOUR },
{ "min", USEC_PER_MINUTE },
{ "s", USEC_PER_SEC },
{ "ms", USEC_PER_MSEC },
{ "us", 1 },
};
unsigned i;
char *p = buf;
bool something = false;
assert(buf);
assert(l > 0);
if (t == USEC_INFINITY) {
strncpy(p, "infinity", l-1);
p[l-1] = 0;
return p;
}
if (t <= 0) {
strncpy(p, "0", l-1);
p[l-1] = 0;
return p;
}
/* The result of this function can be parsed with parse_sec */
for (i = 0; i < ELEMENTSOF(table); i++) {
int k = 0;
size_t n;
bool done = false;
usec_t a, b;
if (t <= 0)
break;
if (t < accuracy && something)
break;
if (t < table[i].usec)
continue;
if (l <= 1)
break;
a = t / table[i].usec;
b = t % table[i].usec;
/* Let's see if we should shows this in dot notation */
if (t < USEC_PER_MINUTE && b > 0) {
usec_t cc;
int j;
j = 0;
for (cc = table[i].usec; cc > 1; cc /= 10)
j++;
for (cc = accuracy; cc > 1; cc /= 10) {
b /= 10;
j--;
}
if (j > 0) {
k = snprintf(p, l,
"%s"USEC_FMT".%0*llu%s",
p > buf ? " " : "",
a,
j,
(unsigned long long) b,
table[i].suffix);
t = 0;
done = true;
}
}
/* No? Then let's show it normally */
if (!done) {
k = snprintf(p, l,
"%s"USEC_FMT"%s",
p > buf ? " " : "",
a,
table[i].suffix);
t = b;
}
n = MIN((size_t) k, l);
l -= n;
p += n;
something = true;
}
*p = 0;
return buf;
}
#if 0 /// UNNEEDED by elogind
void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
assert(f);
assert(name);
assert(t);
if (!dual_timestamp_is_set(t))
return;
fprintf(f, "%s="USEC_FMT" "USEC_FMT"\n",
name,
t->realtime,
t->monotonic);
}
int dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
unsigned long long a, b;
assert(value);
assert(t);
if (sscanf(value, "%llu %llu", &a, &b) != 2) {
log_debug("Failed to parse dual timestamp value \"%s\": %m", value);
return -EINVAL;
}
t->realtime = a;
t->monotonic = b;
return 0;
}
#endif // 0
int timestamp_deserialize(const char *value, usec_t *timestamp) {
int r;
assert(value);
r = safe_atou64(value, timestamp);
if (r < 0)
return log_debug_errno(r, "Failed to parse timestamp value \"%s\": %m", value);
return r;
}
#if 0 /// UNNEEDED by elogind
int parse_timestamp(const char *t, usec_t *usec) {
static const struct {
const char *name;
const int nr;
} day_nr[] = {
{ "Sunday", 0 },
{ "Sun", 0 },
{ "Monday", 1 },
{ "Mon", 1 },
{ "Tuesday", 2 },
{ "Tue", 2 },
{ "Wednesday", 3 },
{ "Wed", 3 },
{ "Thursday", 4 },
{ "Thu", 4 },
{ "Friday", 5 },
{ "Fri", 5 },
{ "Saturday", 6 },
{ "Sat", 6 },
};
const char *k, *utc, *tzn = NULL;
struct tm tm, copy;
time_t x;
usec_t x_usec, plus = 0, minus = 0, ret;
int r, weekday = -1, dst = -1;
unsigned i;
/*
* Allowed syntaxes:
*
* 2012-09-22 16:34:22
* 2012-09-22 16:34 (seconds will be set to 0)
* 2012-09-22 (time will be set to 00:00:00)
* 16:34:22 (date will be set to today)
* 16:34 (date will be set to today, seconds to 0)
* now
* yesterday (time is set to 00:00:00)
* today (time is set to 00:00:00)
* tomorrow (time is set to 00:00:00)
* +5min
* -5days
* @2147483647 (seconds since epoch)
*
*/
assert(t);
assert(usec);
if (t[0] == '@')
return parse_sec(t + 1, usec);
ret = now(CLOCK_REALTIME);
if (streq(t, "now"))
goto finish;
else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
goto finish;
} else if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
goto finish;
} else if ((k = endswith(t, " ago"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &minus);
if (r < 0)
return r;
goto finish;
} else if ((k = endswith(t, " left"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &plus);
if (r < 0)
return r;
goto finish;
}
/* 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 (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:
x = mktime_or_timegm(&tm, utc);
if (x == (time_t) -1)
return -EINVAL;
if (weekday >= 0 && tm.tm_wday != weekday)
return -EINVAL;
ret = (usec_t) x * USEC_PER_SEC + x_usec;
finish:
ret += plus;
if (ret > minus)
ret -= minus;
else
ret = 0;
*usec = ret;
return 0;
}
#endif // 0
static char* extract_multiplier(char *p, usec_t *multiplier) {
static const struct {
const char *suffix;
usec_t usec;
} table[] = {
{ "seconds", USEC_PER_SEC },
{ "second", USEC_PER_SEC },
{ "sec", USEC_PER_SEC },
{ "s", USEC_PER_SEC },
{ "minutes", USEC_PER_MINUTE },
{ "minute", USEC_PER_MINUTE },
{ "min", USEC_PER_MINUTE },
{ "months", USEC_PER_MONTH },
{ "month", USEC_PER_MONTH },
{ "M", USEC_PER_MONTH },
{ "msec", USEC_PER_MSEC },
{ "ms", USEC_PER_MSEC },
{ "m", USEC_PER_MINUTE },
{ "hours", USEC_PER_HOUR },
{ "hour", USEC_PER_HOUR },
{ "hr", USEC_PER_HOUR },
{ "h", USEC_PER_HOUR },
{ "days", USEC_PER_DAY },
{ "day", USEC_PER_DAY },
{ "d", USEC_PER_DAY },
{ "weeks", USEC_PER_WEEK },
{ "week", USEC_PER_WEEK },
{ "w", USEC_PER_WEEK },
{ "years", USEC_PER_YEAR },
{ "year", USEC_PER_YEAR },
{ "y", USEC_PER_YEAR },
{ "usec", 1ULL },
{ "us", 1ULL },
};
unsigned i;
for (i = 0; i < ELEMENTSOF(table); i++) {
char *e;
e = startswith(p, table[i].suffix);
if (e) {
*multiplier = table[i].usec;
return e;
}
}
return p;
}
int parse_time(const char *t, usec_t *usec, usec_t default_unit) {
const char *p, *s;
usec_t r = 0;
bool something = false;
assert(t);
assert(usec);
assert(default_unit > 0);
p = t;
p += strspn(p, WHITESPACE);
s = startswith(p, "infinity");
if (s) {
s += strspn(s, WHITESPACE);
if (*s != 0)
return -EINVAL;
*usec = USEC_INFINITY;
return 0;
}
for (;;) {
long long l, z = 0;
char *e;
unsigned n = 0;
usec_t multiplier = default_unit, k;
p += strspn(p, WHITESPACE);
if (*p == 0) {
if (!something)
return -EINVAL;
break;
}
errno = 0;
l = strtoll(p, &e, 10);
if (errno > 0)
return -errno;
if (l < 0)
return -ERANGE;
if (*e == '.') {
char *b = e + 1;
errno = 0;
z = strtoll(b, &e, 10);
if (errno > 0)
return -errno;
if (z < 0)
return -ERANGE;
if (e == b)
return -EINVAL;
n = e - b;
} else if (e == p)
return -EINVAL;
e += strspn(e, WHITESPACE);
p = extract_multiplier(e, &multiplier);
something = true;
k = (usec_t) z * multiplier;
for (; n > 0; n--)
k /= 10;
r += (usec_t) l * multiplier + k;
}
*usec = r;
return 0;
}
int parse_sec(const char *t, usec_t *usec) {
return parse_time(t, usec, USEC_PER_SEC);
}
#if 0 /// UNNEEDED by elogind
int parse_nsec(const char *t, nsec_t *nsec) {
static const struct {
const char *suffix;
nsec_t nsec;
} table[] = {
{ "seconds", NSEC_PER_SEC },
{ "second", NSEC_PER_SEC },
{ "sec", NSEC_PER_SEC },
{ "s", NSEC_PER_SEC },
{ "minutes", NSEC_PER_MINUTE },
{ "minute", NSEC_PER_MINUTE },
{ "min", NSEC_PER_MINUTE },
{ "months", NSEC_PER_MONTH },
{ "month", NSEC_PER_MONTH },
{ "msec", NSEC_PER_MSEC },
{ "ms", NSEC_PER_MSEC },
{ "m", NSEC_PER_MINUTE },
{ "hours", NSEC_PER_HOUR },
{ "hour", NSEC_PER_HOUR },
{ "hr", NSEC_PER_HOUR },
{ "h", NSEC_PER_HOUR },
{ "days", NSEC_PER_DAY },
{ "day", NSEC_PER_DAY },
{ "d", NSEC_PER_DAY },
{ "weeks", NSEC_PER_WEEK },
{ "week", NSEC_PER_WEEK },
{ "w", NSEC_PER_WEEK },
{ "years", NSEC_PER_YEAR },
{ "year", NSEC_PER_YEAR },
{ "y", NSEC_PER_YEAR },
{ "usec", NSEC_PER_USEC },
{ "us", NSEC_PER_USEC },
{ "nsec", 1ULL },
{ "ns", 1ULL },
{ "", 1ULL }, /* default is nsec */
};
const char *p, *s;
nsec_t r = 0;
bool something = false;
assert(t);
assert(nsec);
p = t;
p += strspn(p, WHITESPACE);
s = startswith(p, "infinity");
if (s) {
s += strspn(s, WHITESPACE);
if (*s != 0)
return -EINVAL;
*nsec = NSEC_INFINITY;
return 0;
}
for (;;) {
long long l, z = 0;
char *e;
unsigned i, n = 0;
p += strspn(p, WHITESPACE);
if (*p == 0) {
if (!something)
return -EINVAL;
break;
}
errno = 0;
l = strtoll(p, &e, 10);
if (errno > 0)
return -errno;
if (l < 0)
return -ERANGE;
if (*e == '.') {
char *b = e + 1;
errno = 0;
z = strtoll(b, &e, 10);
if (errno > 0)
return -errno;
if (z < 0)
return -ERANGE;
if (e == b)
return -EINVAL;
n = e - b;
} else if (e == p)
return -EINVAL;
e += strspn(e, WHITESPACE);
for (i = 0; i < ELEMENTSOF(table); i++)
if (startswith(e, table[i].suffix)) {
nsec_t k = (nsec_t) z * table[i].nsec;
for (; n > 0; n--)
k /= 10;
r += (nsec_t) l * table[i].nsec + k;
p = e + strlen(table[i].suffix);
something = true;
break;
}
if (i >= ELEMENTSOF(table))
return -EINVAL;
}
*nsec = r;
return 0;
}
bool ntp_synced(void) {
struct timex txc = {};
if (adjtimex(&txc) < 0)
return false;
if (txc.status & STA_UNSYNC)
return false;
return true;
}
int get_timezones(char ***ret) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **zones = NULL;
size_t n_zones = 0, n_allocated = 0;
assert(ret);
zones = strv_new("UTC", NULL);
if (!zones)
return -ENOMEM;
n_allocated = 2;
n_zones = 1;
f = fopen("/usr/share/zoneinfo/zone.tab", "re");
if (f) {
char l[LINE_MAX];
FOREACH_LINE(l, f, return -errno) {
char *p, *w;
size_t k;
p = strstrip(l);
if (isempty(p) || *p == '#')
continue;
/* Skip over country code */
p += strcspn(p, WHITESPACE);
p += strspn(p, WHITESPACE);
/* Skip over coordinates */
p += strcspn(p, WHITESPACE);
p += strspn(p, WHITESPACE);
/* Found timezone name */
k = strcspn(p, WHITESPACE);
if (k <= 0)
continue;
w = strndup(p, k);
if (!w)
return -ENOMEM;
if (!GREEDY_REALLOC(zones, n_allocated, n_zones + 2)) {
free(w);
return -ENOMEM;
}
zones[n_zones++] = w;
zones[n_zones] = NULL;
}
strv_sort(zones);
} else if (errno != ENOENT)
return -errno;
*ret = zones;
zones = NULL;
return 0;
}
bool timezone_is_valid(const char *name) {
bool slash = false;
const char *p, *t;
struct stat st;
if (isempty(name))
return false;
if (name[0] == '/')
return false;
for (p = name; *p; p++) {
if (!(*p >= '0' && *p <= '9') &&
!(*p >= 'a' && *p <= 'z') &&
!(*p >= 'A' && *p <= 'Z') &&
!(*p == '-' || *p == '_' || *p == '+' || *p == '/'))
return false;
if (*p == '/') {
if (slash)
return false;
slash = true;
} else
slash = false;
}
if (slash)
return false;
t = strjoina("/usr/share/zoneinfo/", name);
if (stat(t, &st) < 0)
return false;
if (!S_ISREG(st.st_mode))
return false;
return true;
}
#endif // 0
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;
}
#if 0 /// UNNEEDED by elogind
clockid_t clock_boottime_or_monotonic(void) {
if (clock_boottime_supported())
return CLOCK_BOOTTIME;
else
return CLOCK_MONOTONIC;
}
#endif // 0
bool clock_supported(clockid_t clock) {
struct timespec ts;
switch (clock) {
case CLOCK_MONOTONIC:
case CLOCK_REALTIME:
return true;
case CLOCK_BOOTTIME:
return clock_boottime_supported();
case CLOCK_BOOTTIME_ALARM:
if (!clock_boottime_supported())
return false;
/* fall through, after checking the cached value for CLOCK_BOOTTIME. */
default:
/* For everything else, check properly */
return clock_gettime(clock, &ts) >= 0;
}
}
#if 0 /// UNNEEDED by elogind
int get_timezone(char **tz) {
_cleanup_free_ char *t = NULL;
const char *e;
char *z;
int r;
r = readlink_malloc("/etc/localtime", &t);
if (r < 0)
return r; /* returns EINVAL if not a symlink */
e = path_startswith(t, "/usr/share/zoneinfo/");
if (!e)
e = path_startswith(t, "../usr/share/zoneinfo/");
if (!e)
return -EINVAL;
if (!timezone_is_valid(e))
return -EINVAL;
z = strdup(e);
if (!z)
return -ENOMEM;
*tz = z;
return 0;
}
time_t mktime_or_timegm(struct tm *tm, bool utc) {
return utc ? timegm(tm) : mktime(tm);
}
#endif // 0
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);
}
#if 0 /// UNNEEDED by elogind
unsigned long usec_to_jiffies(usec_t u) {
static thread_local unsigned long hz = 0;
long r;
if (hz == 0) {
r = sysconf(_SC_CLK_TCK);
assert(r > 0);
hz = (unsigned long) r;
}
return DIV_ROUND_UP(u , USEC_PER_SEC / hz);
}
#endif // 0