1SD_JOURNAL_GET_CUTOFF_RsEdA_LjToIuMrEn_aUlS_EgCe(t3_)cutoSfDf__JrOeUaRlNtAiLm_eG_EuTs_eCcUTOFF_REALTIME_USEC(3)
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NAME

6       sd_journal_get_cutoff_realtime_usec,
7       sd_journal_get_cutoff_monotonic_usec - Read cut-off timestamps from the
8       current journal entry
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SYNOPSIS

11       #include <systemd/sd-journal.h>
12
13       int sd_journal_get_cutoff_realtime_usec(sd_journal *j, uint64_t *from,
14                                               uint64_t *to);
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16       int sd_journal_get_cutoff_monotonic_usec(sd_journal *j,
17                                                sd_id128_t boot_id,
18                                                uint64_t *from, uint64_t *to);
19

DESCRIPTION

21       sd_journal_get_cutoff_realtime_usec() retrieves the realtime
22       (wallclock) timestamps of the first and last entries accessible in the
23       journal. It takes three arguments: the journal context object j and two
24       pointers from and to pointing at 64-bit unsigned integers to store the
25       timestamps in. The timestamps are in microseconds since the epoch, i.e.
26       CLOCK_REALTIME. Either one of the two timestamp arguments may be passed
27       as NULL in case the timestamp is not needed, but not both.
28
29       sd_journal_get_cutoff_monotonic_usec() retrieves the monotonic
30       timestamps of the first and last entries accessible in the journal. It
31       takes three arguments: the journal context object j, a 128-bit
32       identifier for the boot boot_id, and two pointers to 64-bit unsigned
33       integers to store the timestamps, from and to. The timestamps are in
34       microseconds since boot-up of the specific boot, i.e.  CLOCK_MONOTONIC.
35       Since the monotonic clock begins new with every reboot it only defines
36       a well-defined point in time when used together with an identifier
37       identifying the boot, see sd_id128_get_boot(3) for more information.
38       The function will return the timestamps for the boot identified by the
39       passed boot ID. Either one of the two timestamp arguments may be passed
40       as NULL in case the timestamp is not needed, but not both.
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RETURN VALUE

43       sd_journal_get_cutoff_realtime_usec() and
44       sd_journal_get_cutoff_monotonic_usec() return 1 on success, 0 if not
45       suitable entries are in the journal or a negative errno-style error
46       code.
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48       Locations pointed to by parameters from and to will be set only if the
49       return value is positive, and obviously, the parameters are non-null.
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NOTES

52       All functions listed here are thread-agnostic and only a single
53       specific thread may operate on a given object during its entire
54       lifetime. It's safe to allocate multiple independent objects and use
55       each from a specific thread in parallel. However, it's not safe to
56       allocate such an object in one thread, and operate or free it from any
57       other, even if locking is used to ensure these threads don't operate on
58       it at the very same time.
59
60       Functions described here are available as a shared library, which can
61       be compiled against and linked to with the libsystemd pkg-config(1)
62       file.
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SEE ALSO

65       systemd(1), sd-journal(3), sd_journal_open(3),
66       sd_journal_get_realtime_usec(3), sd_id128_get_boot(3), clock_gettime(2)
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70systemd 254                             SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)
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