SD_JOURNAL_GET_CUTOFF_sd_journal_get_cutSD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)NAME
sd_journal_get_cutoff_realtime_usec,
sd_journal_get_cutoff_monotonic_usec - Read cut-off timestamps from the
current journal entry
SYNOPSIS
#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);
DESCRIPTIONsd_journal_get_cutoff_realtime_usec() gets the realtime (wallclock)
timestamps of the first and last entries accessible in the journal. It
takes three arguments: the journal context object and two pointers to
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() gets the monotonic timestamps of
the first and last entries accessible in the journal. It takes three
arguments: the journal context object, a 128-bit identifier for the
boot, and two pointers to 64-bit unsigned integers to store the
timestamps. 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 VALUEsd_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.
NOTES
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 ALSOsystemd(1), sd-journal(3), sd_journal_open(3),
sd_journal_get_realtime_usec(3), sd_id128_get_boot(3), clock_gettime(2)systemd 212SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)