Saving emacs uptime?

Saving emacs uptime?

[Sharon Kimble]

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Hi Folks.

How can I have emacs save its uptime to a plain text file when it closes, by my hand or if it crashes please?  

Thanks
  Sharon.
- -- 
A taste of linux = http://www.sharons.org.uk
DrugFacts = https://www.drugfacts.org.uk
Debian 12.7, Fluxbox 1.3.7, emacs 31.0.50, org 9.7.11 
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Re: Saving emacs uptime?

[Eli Zaretskii]

> From: Sharon Kimble <boudiccas@skimble09.plus.com>
> Date: Thu, 26 Sep 2024 13:37:09 +0100
> 
> How can I have emacs save its uptime to a plain text file when it closes, by my hand or if it crashes please?  

Write a kill-emacs-hook?

Re: Saving emacs uptime?

[Stefan Monnier via Users list for the GNU Emacs text editor]

> How can I have emacs save its uptime to a plain text file when it closes, by
> my hand or if it crashes please?  

By definition, when it crashes it can't do anything "well-defined", such
as saving its uptime to a known file.

I can see two workarounds:

- Save the uptime on a regular basis (e.g. once an hour).
- Save the uptime not from within Emacs but from a program (script?) you
  write which launches Emacs and writes the duration of the session into
  a file when the Emacs process ends.


        Stefan

Re: Saving emacs uptime?

[Bob Newell]

> - Save the uptime on a regular basis (e.g. once an hour).

If you want better resolution but don't need real precision, a
timer will let you write out the uptime say, every 5 minutes,
with minimal blocking as it would be a fast operation.  Or
even use an idle timer.  You wouldn't have to worry much about
losing a lot of information in a crash and you wouldn't even
need a kill-emacs hook.

It all depends on your use case.  If you're using this for
project tracking or billing, a 5 minute margin of error
wouldn't be all that bad.

-- 
Bob Newell
Honolulu, Hawai`i

- Via GNU-Linux/Emacs/Gnus/BBDB

Re: Saving emacs uptime?

[Björn Bidar]

Stefan Monnier via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

>> How can I have emacs save its uptime to a plain text file when it closes, by
>> my hand or if it crashes please?  
>
> By definition, when it crashes it can't do anything "well-defined", such
> as saving its uptime to a known file.
>
> I can see two workarounds:
>
> - Save the uptime on a regular basis (e.g. once an hour).
> - Save the uptime not from within Emacs but from a program (script?) you
>   write which launches Emacs and writes the duration of the session into
>   a file when the Emacs process ends.
>
>         Stefan

Another workaround would be to use the init system to track the life
time of Emacs.
E.g. systemd tracks how long Emacs has run in general and for user
services (emacs.service).

[Solved] Re: Saving emacs uptime?

[Sharon Kimble]

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Sharon Kimble <boudiccas@skimble09.plus.com> writes:

> Hi Folks.
>
> How can I have emacs save its uptime to a plain text file when it closes, by my hand or if it crashes please?  
>
> Thanks
>   Sharon.

Thanks to everyone who replied, and I've found a solution from MELPA, in a package called 'uptimes' which saves my uptime every 5 minutes, and also you can show its uptimes for the last 10 restarts (default option) within emacs itself.

Thanks
  Sharon.  
- -- 
A taste of linux = http://www.sharons.org.uk
DrugFacts = https://www.drugfacts.org.uk
Debian 12.7, Fluxbox 1.3.7, emacs 31.0.50, org 9.7.11 
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