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-rw-r--r--src/basic/time-util.c682
1 files changed, 506 insertions, 176 deletions
diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index 12f1b193be..fedff1362c 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
@@ -19,23 +17,65 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <time.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
#include <string.h>
-#include <sys/timex.h>
+#include <sys/stat.h>
+#include <sys/time.h>
#include <sys/timerfd.h>
-
-#include "util.h"
-#include "time-util.h"
+#include <sys/timex.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "log.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "string-util.h"
#include "strv.h"
+#include "time-util.h"
+
+static 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(clock_id, &ts) == 0);
+ assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0);
return timespec_load(&ts);
}
+nsec_t now_nsec(clockid_t clock_id) {
+ struct timespec ts;
+
+ assert_se(clock_gettime(map_clock_id(clock_id), &ts) == 0);
+
+ return timespec_load_nsec(&ts);
+}
+
dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
assert(ts);
@@ -45,6 +85,16 @@ dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
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);
@@ -57,12 +107,25 @@ dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
ts->realtime = u;
delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
- ts->monotonic = now(CLOCK_MONOTONIC);
+ ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta);
- if ((int64_t) ts->monotonic > delta)
- ts->monotonic -= delta;
- else
- ts->monotonic = 0;
+ return ts;
+}
+
+triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) {
+ int64_t delta;
+
+ assert(ts);
+
+ if (u == USEC_INFINITY || u <= 0) {
+ ts->realtime = ts->monotonic = ts->boottime = u;
+ return ts;
+ }
+
+ ts->realtime = u;
+ delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
+ ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta);
+ ts->boottime = clock_boottime_supported() ? usec_sub(now(CLOCK_BOOTTIME), delta) : USEC_INFINITY;
return ts;
}
@@ -78,21 +141,51 @@ dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) {
ts->monotonic = u;
delta = (int64_t) now(CLOCK_MONOTONIC) - (int64_t) u;
+ ts->realtime = usec_sub(now(CLOCK_REALTIME), delta);
- ts->realtime = now(CLOCK_REALTIME);
- if ((int64_t) ts->realtime > delta)
- ts->realtime -= delta;
- else
- ts->realtime = 0;
+ return ts;
+}
+
+dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u) {
+ int64_t delta;
+
+ if (u == USEC_INFINITY) {
+ ts->realtime = ts->monotonic = USEC_INFINITY;
+ return ts;
+ }
+
+ dual_timestamp_get(ts);
+ delta = (int64_t) now(clock_boottime_or_monotonic()) - (int64_t) u;
+ ts->realtime = usec_sub(ts->realtime, delta);
+ ts->monotonic = usec_sub(ts->monotonic, delta);
return ts;
}
+usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) {
+
+ switch (clock) {
+
+ case CLOCK_REALTIME:
+ case CLOCK_REALTIME_ALARM:
+ return ts->realtime;
+
+ case CLOCK_MONOTONIC:
+ return ts->monotonic;
+
+ case CLOCK_BOOTTIME:
+ case CLOCK_BOOTTIME_ALARM:
+ return ts->boottime;
+
+ default:
+ return USEC_INFINITY;
+ }
+}
+
usec_t timespec_load(const struct timespec *ts) {
assert(ts);
- if (ts->tv_sec == (time_t) -1 &&
- ts->tv_nsec == (long) -1)
+ 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)
@@ -103,6 +196,18 @@ usec_t timespec_load(const struct timespec *ts) {
(usec_t) ts->tv_nsec / NSEC_PER_USEC;
}
+nsec_t timespec_load_nsec(const struct timespec *ts) {
+ assert(ts);
+
+ if (ts->tv_sec == (time_t) -1 && ts->tv_nsec == (long) -1)
+ return NSEC_INFINITY;
+
+ if ((nsec_t) ts->tv_sec >= (UINT64_MAX - ts->tv_nsec) / NSEC_PER_SEC)
+ return NSEC_INFINITY;
+
+ return (nsec_t) ts->tv_sec * NSEC_PER_SEC + (nsec_t) ts->tv_nsec;
+}
+
struct timespec *timespec_store(struct timespec *ts, usec_t u) {
assert(ts);
@@ -147,67 +252,114 @@ struct timeval *timeval_store(struct timeval *tv, usec_t u) {
return tv;
}
-static char *format_timestamp_internal(char *buf, size_t l, usec_t t, bool utc) {
+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);
- assert(l > 0);
+ 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;
+ return NULL; /* Timestamp is unset */
- sec = (time_t) (t / USEC_PER_SEC);
+ sec = (time_t) (t / USEC_PER_SEC); /* Round down */
+ if ((usec_t) sec != (t / USEC_PER_SEC))
+ return NULL; /* overflow? */
- if (utc)
- gmtime_r(&sec, &tm);
- else
- localtime_r(&sec, &tm);
- if (strftime(buf, l, "%a %Y-%m-%d %H:%M:%S %Z", &tm) <= 0)
+ if (!localtime_or_gmtime_r(&sec, &tm, utc))
return NULL;
- return buf;
-}
+ /* Start with the week day */
+ assert((size_t) tm.tm_wday < ELEMENTSOF(weekdays));
+ memcpy(buf, weekdays[tm.tm_wday], 4);
-char *format_timestamp(char *buf, size_t l, usec_t t) {
- return format_timestamp_internal(buf, l, t, false);
-}
-
-char *format_timestamp_utc(char *buf, size_t l, usec_t t) {
- return format_timestamp_internal(buf, l, t, true);
-}
+ /* Add the main components */
+ if (strftime(buf + 3, l - 3, " %Y-%m-%d %H:%M:%S", &tm) <= 0)
+ return NULL; /* Doesn't fit */
-static char *format_timestamp_internal_us(char *buf, size_t l, usec_t t, bool utc) {
- struct tm tm;
- time_t sec;
+ /* Append the microseconds part, if that's requested */
+ if (us) {
+ n = strlen(buf);
+ if (n + 8 > l)
+ return NULL; /* Microseconds part doesn't fit. */
- assert(buf);
- assert(l > 0);
+ sprintf(buf + n, ".%06llu", (unsigned long long) (t % USEC_PER_SEC));
+ }
- if (t <= 0 || t == USEC_INFINITY)
- return NULL;
+ /* 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);
+ }
+ }
- sec = (time_t) (t / USEC_PER_SEC);
- if (utc)
- gmtime_r(&sec, &tm);
- else
- localtime_r(&sec, &tm);
+ return buf;
+}
- if (strftime(buf, l, "%a %Y-%m-%d %H:%M:%S", &tm) <= 0)
- return NULL;
- snprintf(buf + strlen(buf), l - strlen(buf), ".%06llu", (unsigned long long) (t % USEC_PER_SEC));
- if (strftime(buf + strlen(buf), l - strlen(buf), " %Z", &tm) <= 0)
- return NULL;
+char *format_timestamp(char *buf, size_t l, usec_t t) {
+ return format_timestamp_internal(buf, l, t, false, false);
+}
- return buf;
+char *format_timestamp_utc(char *buf, size_t l, usec_t t) {
+ return format_timestamp_internal(buf, l, t, true, false);
}
char *format_timestamp_us(char *buf, size_t l, usec_t t) {
- return format_timestamp_internal_us(buf, l, t, false);
+ return format_timestamp_internal(buf, l, t, false, true);
}
char *format_timestamp_us_utc(char *buf, size_t l, usec_t t) {
- return format_timestamp_internal_us(buf, l, t, true);
+ return format_timestamp_internal(buf, l, t, true, true);
}
char *format_timestamp_relative(char *buf, size_t l, usec_t t) {
@@ -278,15 +430,15 @@ char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy) {
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 },
+ { "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;
@@ -405,7 +557,7 @@ int dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
assert(t);
if (sscanf(value, "%llu %llu", &a, &b) != 2) {
- log_debug("Failed to parse finish timestamp value %s.", value);
+ log_debug("Failed to parse dual timestamp value \"%s\": %m", value);
return -EINVAL;
}
@@ -415,6 +567,18 @@ int dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
return 0;
}
+int timestamp_deserialize(const char *value, usec_t *timestamp) {
+ int r;
+
+ assert(value);
+
+ r = safe_atou64(value, timestamp);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to parse timestamp value \"%s\": %m", value);
+
+ return r;
+}
+
int parse_timestamp(const char *t, usec_t *usec) {
static const struct {
const char *name;
@@ -436,11 +600,11 @@ int parse_timestamp(const char *t, usec_t *usec) {
{ "Sat", 6 },
};
- const char *k;
+ const char *k, *utc, *tzn = NULL;
struct tm tm, copy;
time_t x;
- usec_t plus = 0, minus = 0, ret;
- int r, weekday = -1;
+ usec_t x_usec, plus = 0, minus = 0, ret;
+ int r, weekday = -1, dst = -1;
unsigned i;
/*
@@ -464,28 +628,15 @@ int parse_timestamp(const char *t, usec_t *usec) {
assert(t);
assert(usec);
- x = time(NULL);
- assert_se(localtime_r(&x, &tm));
- tm.tm_isdst = -1;
-
- if (streq(t, "now"))
- goto finish;
+ if (t[0] == '@')
+ return parse_sec(t + 1, usec);
- else if (streq(t, "today")) {
- tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
- goto finish;
+ ret = now(CLOCK_REALTIME);
- } else if (streq(t, "yesterday")) {
- tm.tm_mday --;
- tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
- goto finish;
-
- } else if (streq(t, "tomorrow")) {
- tm.tm_mday ++;
- tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
+ if (streq(t, "now"))
goto finish;
- } else if (t[0] == '+') {
+ else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
@@ -499,35 +650,90 @@ int parse_timestamp(const char *t, usec_t *usec) {
goto finish;
- } else if (t[0] == '@')
- return parse_sec(t + 1, usec);
-
- else if (endswith(t, " ago")) {
- _cleanup_free_ char *z;
+ } else if ((k = endswith(t, " ago"))) {
+ t = strndupa(t, k - t);
- z = strndup(t, strlen(t) - 4);
- if (!z)
- return -ENOMEM;
-
- r = parse_sec(z, &minus);
+ r = parse_sec(t, &minus);
if (r < 0)
return r;
goto finish;
- } else if (endswith(t, " left")) {
- _cleanup_free_ char *z;
- z = strndup(t, strlen(t) - 4);
- if (!z)
- return -ENOMEM;
+ } else if ((k = endswith(t, " left"))) {
+ t = strndupa(t, k - t);
- r = parse_sec(z, &plus);
+ 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;
@@ -545,66 +751,94 @@ int parse_timestamp(const char *t, usec_t *usec) {
copy = tm;
k = strptime(t, "%y-%m-%d %H:%M:%S", &tm);
- if (k && *k == 0)
- goto finish;
+ 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 && *k == 0)
- goto finish;
+ 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 finish;
+ goto from_tm;
}
tm = copy;
k = strptime(t, "%Y-%m-%d %H:%M", &tm);
if (k && *k == 0) {
tm.tm_sec = 0;
- goto finish;
+ 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 finish;
+ 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 finish;
+ goto from_tm;
}
tm = copy;
k = strptime(t, "%H:%M:%S", &tm);
- if (k && *k == 0)
- goto finish;
+ 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 finish;
+ goto from_tm;
}
return -EINVAL;
-finish:
- x = mktime(&tm);
+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;
+ ret = (usec_t) x * USEC_PER_SEC + x_usec;
+finish:
ret += plus;
if (ret > minus)
ret -= minus;
@@ -616,47 +850,63 @@ finish:
return 0;
}
-int parse_sec(const char *t, usec_t *usec) {
+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 },
+ { "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 },
- { "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 },
- { "", USEC_PER_SEC }, /* default is sec */
+ { "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;
@@ -674,7 +924,8 @@ int parse_sec(const char *t, usec_t *usec) {
for (;;) {
long long l, z = 0;
char *e;
- unsigned i, n = 0;
+ unsigned n = 0;
+ usec_t multiplier = default_unit, k;
p += strspn(p, WHITESPACE);
@@ -687,10 +938,8 @@ int parse_sec(const char *t, usec_t *usec) {
errno = 0;
l = strtoll(p, &e, 10);
-
if (errno > 0)
return -errno;
-
if (l < 0)
return -ERANGE;
@@ -714,24 +963,16 @@ int parse_sec(const char *t, usec_t *usec) {
return -EINVAL;
e += strspn(e, WHITESPACE);
+ p = extract_multiplier(e, &multiplier);
- for (i = 0; i < ELEMENTSOF(table); i++)
- if (startswith(e, table[i].suffix)) {
- usec_t k = (usec_t) z * table[i].usec;
-
- for (; n > 0; n--)
- k /= 10;
+ something = true;
- r += (usec_t) l * table[i].usec + k;
- p = e + strlen(table[i].suffix);
+ k = (usec_t) z * multiplier;
- something = true;
- break;
- }
-
- if (i >= ELEMENTSOF(table))
- return -EINVAL;
+ for (; n > 0; n--)
+ k /= 10;
+ r += (usec_t) l * multiplier + k;
}
*usec = r;
@@ -739,6 +980,10 @@ int parse_sec(const char *t, usec_t *usec) {
return 0;
}
+int parse_sec(const char *t, usec_t *usec) {
+ return parse_time(t, usec, USEC_PER_SEC);
+}
+
int parse_nsec(const char *t, nsec_t *nsec) {
static const struct {
const char *suffix;
@@ -945,7 +1190,10 @@ bool timezone_is_valid(const char *name) {
const char *p, *t;
struct stat st;
- if (!name || *name == 0 || *name == '/')
+ if (isempty(name))
+ return false;
+
+ if (name[0] == '/')
return false;
for (p = name; *p; p++) {
@@ -978,20 +1226,102 @@ bool timezone_is_valid(const char *name) {
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) {
- static clockid_t clock = -1;
- int fd;
+ if (clock_boottime_supported())
+ return CLOCK_BOOTTIME;
+ else
+ return CLOCK_MONOTONIC;
+}
- if (clock != -1)
- return clock;
+bool clock_supported(clockid_t clock) {
+ struct timespec ts;
- fd = timerfd_create(CLOCK_BOOTTIME, TFD_NONBLOCK|TFD_CLOEXEC);
- if (fd < 0)
- clock = CLOCK_MONOTONIC;
- else {
- safe_close(fd);
- clock = CLOCK_BOOTTIME;
+ switch (clock) {
+
+ case CLOCK_MONOTONIC:
+ case CLOCK_REALTIME:
+ return true;
+
+ case CLOCK_BOOTTIME:
+ return clock_boottime_supported();
+
+ case CLOCK_BOOTTIME_ALARM:
+ if (!clock_boottime_supported())
+ return false;
+
+ /* fall through, after checking the cached value for CLOCK_BOOTTIME. */
+
+ default:
+ /* For everything else, check properly */
+ return clock_gettime(clock, &ts) >= 0;
+ }
+}
+
+int get_timezone(char **tz) {
+ _cleanup_free_ char *t = NULL;
+ const char *e;
+ char *z;
+ int r;
+
+ r = readlink_malloc("/etc/localtime", &t);
+ if (r < 0)
+ return r; /* returns EINVAL if not a symlink */
+
+ e = path_startswith(t, "/usr/share/zoneinfo/");
+ if (!e)
+ e = path_startswith(t, "../usr/share/zoneinfo/");
+ if (!e)
+ return -EINVAL;
+
+ if (!timezone_is_valid(e))
+ return -EINVAL;
+
+ z = strdup(e);
+ if (!z)
+ return -ENOMEM;
+
+ *tz = z;
+ return 0;
+}
+
+time_t mktime_or_timegm(struct tm *tm, bool utc) {
+ return utc ? timegm(tm) : mktime(tm);
+}
+
+struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc) {
+ return utc ? gmtime_r(t, tm) : localtime_r(t, tm);
+}
+
+unsigned long usec_to_jiffies(usec_t u) {
+ static thread_local unsigned long hz = 0;
+ long r;
+
+ if (hz == 0) {
+ r = sysconf(_SC_CLK_TCK);
+
+ assert(r > 0);
+ hz = (unsigned long) r;
}
- return clock;
+ return DIV_ROUND_UP(u , USEC_PER_SEC / hz);
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-22 23:04:07 +0000