On 25 February 2015 at 20:50, Chris Morgan <[email protected]> wrote:
> From > http://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html#__MONOTONIC_TIMESTAMP= > it looks like __MONOTONIC_TIMESTAMP might be just what I'm looking for > but the information at the start of that section has me wondering if I > can rely on this __MONOTONIC_TIMESTAMP being present for all entries > and use this as the system uptime. > Those three fields will always be present. They are not *in* the data, but metadata kept for every journal entry. At the libsystemd level, you access them via their own apis, see http://www.freedesktop.org/software/systemd/man/sd_journal_get_cutoff_monotonic_usec.html Please refer to `man 2 clock_gettime` on whether CLOCK_MONOTONIC suits your needs for an 'uptime' clock.
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