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time: support @ syntax for denoting times since the UNIX epoch 1970-1-1

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This commit is contained in:
Lennart Poettering 2014-03-25 04:08:16 +01:00
parent a2b135e3d8
commit 5ba6e0949c
4 changed files with 18 additions and 9 deletions
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16
man/systemd.time.xml
View File

@ -153,14 +153,19 @@
<para>When parsing, systemd will also accept relative
time specifications. A time span (see above) that is
prefixed with <literal>+</literal> is evaluated to the
current time plus the specified
time span. Correspondingly, a time span that is prefixed
current time plus the specified time
span. Correspondingly, a time span that is prefixed
with <literal>-</literal> is evaluated to the current
time minus the specified time span. Instead of
prefixing the time span with <literal>-</literal>, it
may also be suffixed with a space and the word
prefixing the time span with <literal>+</literal> or
<literal>-</literal>, it may also be suffixed with a
space and the word <literal>left</literal> or
<literal>ago</literal>.</para>
<para>Finally, a timespan prefixed with
<literal>@</literal> is evaluated relative to the UNIX
time epoch 1st Jan, 1970, 00:00.</para>
<para>Examples for valid timestamps and their
normalized form (assuming the current time was
2012-11-23 18:15:22):</para>
@ -177,7 +182,8 @@
tomorrow → Fri 2012-11-24 00:00:00
+3h30min → Fri 2012-11-23 21:45:22
-5s → Fri 2012-11-23 18:15:17
11min ago → Fri 2012-11-23 18:04:22</programlisting>
11min ago → Fri 2012-11-23 18:04:22
@1395716396 → Tue 2014-03-25 03:59:56</programlisting>
<para>Note that timestamps printed by systemd will not
be parsed correctly by systemd, as the timezone

1
src/shared/calendarspec.c
View File

@ -938,7 +938,6 @@ int calendar_spec_next_usec(const CalendarSpec *spec, usec_t usec, usec_t *next)
if (t == (time_t) -1)
return -EINVAL;
*next = (usec_t) t * USEC_PER_SEC;
return 0;
}

9
src/shared/time-util.c
View File

@ -432,6 +432,7 @@ int parse_timestamp(const char *t, usec_t *usec) {
* tomorrow (time is set to 00:00:00)
* +5min
* -5days
* @2147483647 (seconds since epoch)
*
*/
@ -460,21 +461,23 @@ int parse_timestamp(const char *t, usec_t *usec) {
goto finish;
} else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
goto finish;
} else if (t[0] == '-') {
} else if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
goto finish;
} else if (endswith(t, " ago")) {
} else if (t[0] == '@')
return parse_sec(t + 1, usec);
else if (endswith(t, " ago")) {
_cleanup_free_ char *z;
z = strndup(t, strlen(t) - 4);

1
src/test/test-date.c
View File

@ -56,6 +56,7 @@ int main(int argc, char *argv[]) {
test_one("+2d");
test_one("+2y 4d");
test_one("5months ago");
test_one("@1395716396");
return 0;
}