NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON

SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)toff_realtime_usecOFF_REALTIME_USEC(3)

NAME         top

       sd_journal_get_cutoff_realtime_usec,
       sd_journal_get_cutoff_monotonic_usec - Read cut-off timestamps from
       the current journal entry

SYNOPSIS         top

       #include <systemd/sd-journal.h>

       int sd_journal_get_cutoff_realtime_usec(sd_journal *j,
                                               uint64_t *from,
                                               uint64_t *to);

       int sd_journal_get_cutoff_monotonic_usec(sd_journal *j,
                                                sd_id128_t boot_id,
                                                uint64_t *from,
                                                uint64_t *to);

DESCRIPTION         top

       sd_journal_get_cutoff_realtime_usec() retrieves the realtime
       (wallclock) timestamps of the first and last entries accessible in
       the journal. It takes three arguments: the journal context object j
       and two pointers from and to pointing at 64-bit unsigned integers to
       store the timestamps in. The timestamps are in microseconds since the
       epoch, i.e.  CLOCK_REALTIME. Either one of the two timestamp
       arguments may be passed as NULL in case the timestamp is not needed,
       but not both.

       sd_journal_get_cutoff_monotonic_usec() retrieves the monotonic
       timestamps of the first and last entries accessible in the journal.
       It takes three arguments: the journal context object j, a 128-bit
       identifier for the boot boot_id, and two pointers to 64-bit unsigned
       integers to store the timestamps, from and to. The timestamps are in
       microseconds since boot-up of the specific boot, i.e.
       CLOCK_MONOTONIC. Since the monotonic clock begins new with every
       reboot it only defines a well-defined point in time when used
       together with an identifier identifying the boot, see
       sd_id128_get_boot(3) for more information. The function will return
       the timestamps for the boot identified by the passed boot ID. Either
       one of the two timestamp arguments may be passed as NULL in case the
       timestamp is not needed, but not both.

RETURN VALUE         top

       sd_journal_get_cutoff_realtime_usec() and
       sd_journal_get_cutoff_monotonic_usec() return 1 on success, 0 if not
       suitable entries are in the journal or a negative errno-style error
       code.

       Locations pointed to by parameters from and to will be set only if
       the return value is positive, and obviously, the parameters are
       non-null.

NOTES         top

       The sd_journal_get_cutoff_realtime_usec() and
       sd_journal_get_cutoff_monotonic_usec() interfaces are available as a
       shared library, which can be compiled and linked to with the
       libsystemd pkg-config(1) file.

SEE ALSO         top

       systemd(1), sd-journal(3), sd_journal_open(3),
       sd_journal_get_realtime_usec(3), sd_id128_get_boot(3),
       clock_gettime(2)

COLOPHON         top

       This page is part of the systemd (systemd system and service manager)
       project.  Information about the project can be found at 
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have a bug
       report for this manual page, see 
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.  This
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       COLOPHON (which is not part of the original manual page), send a mail
       to man-pages@man7.org

systemd 231                           SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)