[systemd-devel] Feature suggestion: journalctrl -b <n>
david at davidstrauss.net
Sat Sep 29 02:11:19 PDT 2012
On Wed, Sep 26, 2012 at 2:51 PM, Henrik /KaarPoSoft
<henrik at kaarposoft.dk> wrote:
> Hence I would like to propose a new feature:
> "journalctrl -b <n>"
> should show messages from the n'th previous boot,
> default being n=0, i.e. current boot.
> What do you think about this?
Rather than add a special case for boots, I'd prefer moving to a
mechanism more like git or Bazaar has for specifying revision ranges.
There would be various specification approaches, all of which
translate into (if they aren't intrinsically) a cursor position. Then,
it's modular for specifying the range by date, boot number, or any
other monotonic property of the journal entries.
I'll look into how hard this would be to add. Any other monotonic
features we could use as a range for journal entries? The monotonic
feature is important so it's possible to discover the first or last
qualifying item in an efficient way like a binary search.
| david at davidstrauss.net
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