Convert Timestamp in text to Serial Date-Time

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sd_journal_get_cutoff_monotonic_usec

SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)			sd_journal_get_cutoff_realtime_usec		    SD_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);

DESCRIPTION

       sd_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 VALUE

       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.

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-journal pkg-config(1) file.

SEE ALSO

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

systemd 208												    SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)

Shell Programming and Scripting