2017-11-18 17:09:20 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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2012-11-23 21:37:58 +01:00
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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***/
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/* A structure for specifying (possibly repetitive) points in calendar
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* time, a la cron */
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#include <stdbool.h>
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2015-11-18 22:46:33 +01:00
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2015-11-30 21:43:37 +01:00
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#include "time-util.h"
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2012-11-23 21:37:58 +01:00
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#include "util.h"
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typedef struct CalendarComponent {
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2016-12-16 21:49:54 +01:00
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int start;
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int stop;
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2012-11-23 21:37:58 +01:00
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int repeat;
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struct CalendarComponent *next;
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} CalendarComponent;
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typedef struct CalendarSpec {
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int weekdays_bits;
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2016-11-22 16:05:10 +01:00
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bool end_of_month;
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2015-10-15 01:57:59 +02:00
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bool utc;
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util-lib: make timestamp generation and parsing reversible (#3869)
This patch improves parsing and generation of timestamps and calendar
specifications in two ways:
- The week day is now always printed in the abbreviated English form, instead
of the locale's setting. This makes sure we can always parse the week day
again, even if the locale is changed. Given that we don't follow locale
settings for printing timestamps in any other way either (for example, we
always use 24h syntax in order to make uniform parsing possible), it only
makes sense to also stick to a generic, non-localized form for the timestamp,
too.
- When parsing a timestamp, the local timezone (in its DST or non-DST name)
may be specified, in addition to "UTC". Other timezones are still not
supported however (not because we wouldn't want to, but mostly because libc
offers no nice API for that). In itself this brings no new features, however
it ensures that any locally formatted timestamp's timezone is also parsable
again.
These two changes ensure that the output of format_timestamp() may always be
passed to parse_timestamp() and results in the original input. The related
flavours for usec/UTC also work accordingly. Calendar specifications are
extended in a similar way.
The man page is updated accordingly, in particular this removes the claim that
timestamps systemd prints wouldn't be parsable by systemd. They are now.
The man page previously showed invalid timestamps as examples. This has been
removed, as the man page shouldn't be a unit test, where such negative examples
would be useful. The man page also no longer mentions the names of internal
functions, such as format_timestamp_us() or UNIX error codes such as EINVAL.
2016-08-04 01:04:53 +02:00
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int dst;
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2017-09-06 11:56:36 +02:00
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char *timezone;
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2012-11-23 21:37:58 +01:00
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CalendarComponent *year;
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CalendarComponent *month;
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CalendarComponent *day;
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CalendarComponent *hour;
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CalendarComponent *minute;
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2015-11-16 09:15:05 +01:00
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CalendarComponent *microsecond;
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2012-11-23 21:37:58 +01:00
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} CalendarSpec;
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2017-11-17 10:32:48 +01:00
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CalendarSpec* calendar_spec_free(CalendarSpec *c);
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2012-11-23 21:37:58 +01:00
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int calendar_spec_normalize(CalendarSpec *spec);
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bool calendar_spec_valid(CalendarSpec *spec);
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int calendar_spec_to_string(const CalendarSpec *spec, char **p);
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int calendar_spec_from_string(const char *p, CalendarSpec **spec);
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int calendar_spec_next_usec(const CalendarSpec *spec, usec_t usec, usec_t *next);
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2017-11-17 10:33:22 +01:00
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DEFINE_TRIVIAL_CLEANUP_FUNC(CalendarSpec*, calendar_spec_free);
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