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dippen
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PostPosted: Sat Dec 21, 2002 3:04 am    Post subject: shutting your pc down when emerge is finished Reply with quote

you know that, you sitting in front of your pc, its late at night.
you wanna go sleeping, but you think : emerge -u world will finish in few minutes.. and you wait and wait..
i got a solution.. very trivial, but it works:
start this script and your computer halts if the emerge-process is finished.
i call it haltAfterEmerge.sh
Code:
#!/bin/bash

while [ 1 ]; do

        if [ -z "`ps -e | grep python`" ]; then
                /sbin/halt;
                exit;
        fi;

        sleep 2;
done;

it looks every two seconds for a python-process (emerge is one),
if it can't find one, it executes '/sbin/halt'

you can substitute '/sbin/halt' with 'printf \\a', then it beeps every
two seconds.... maybe to wake you up ;) -- in some situations useful.

greetz,
dippen

excuse my poor english.. i'm working on it.
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pizen
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PostPosted: Sat Dec 21, 2002 6:40 am    Post subject: Reply with quote

why not just:
Code:
$ emerge <whatever> && /sbin/halt
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bos_mindwarp
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PostPosted: Sat Dec 21, 2002 8:36 am    Post subject: Reply with quote

pizen wrote:
why not just:
Code:
$ emerge <whatever> && /sbin/halt


because it's not high-tech? =)
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snutte
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PostPosted: Sat Dec 21, 2002 8:54 am    Post subject: Reply with quote

My vote is for the
Code:

emerge <whatever> && poweoff
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kram
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PostPosted: Sat Dec 21, 2002 9:37 am    Post subject: Reply with quote

pizen wrote:
why not just:
Code:
$ emerge <whatever> && /sbin/halt

I do
Code:
$ emerge <whatever> &> ~/build.log; /sbin/halt

so it shuts down regardless of whether the build was successful.

Can you do this once you've already started a build? Maybe if openoffice has been building for 3 hours already? :)
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dippen
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PostPosted: Sat Dec 21, 2002 3:37 pm    Post subject: Reply with quote

Quote:
$ emerge <whatever> && /sbin/halt

is the easiest way..

if i start an 'emerge <whatever>', i mostly dont know
if i want to shut down my computer when it is finished..
so if i want it, then i start my script.


and yes, i'm glad that its a VERY high-tech solution ;)
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carambola5
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PostPosted: Sat Dec 21, 2002 6:37 pm    Post subject: Reply with quote

pizen wrote:
why not just:
Code:
$ emerge <whatever> && /sbin/halt


I think you're missing the point. The script is an "afterthought" type of thing. Say you start a merge, but after awhile, you realize it's gonna take longer than expected. If you want to do something after it's done (shutdown or beep at you), you have two choices:
  • Stop the merge, and restart it with the command "emerge <blah> && /sbin/halt"
  • Or, start a script with the functionality of the original post's.

I'm guessing that, since this is usually done with longer merges, that you wouldn't want to restart the process.

One interesting aspect of the function behind this script is a theoretical GUI frontend to emerge. If the user starts a batch of emerges, he/she can apply a notification event even after the emerges start by simply toggling a button.
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carambola5
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PostPosted: Sat Dec 21, 2002 6:37 pm    Post subject: Reply with quote

grr. double post.
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pizen
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PostPosted: Sat Dec 21, 2002 6:55 pm    Post subject: Reply with quote

carambola5 wrote:
I think you're missing the point. The script is an "afterthought" type of thing.
I realized this after reading a few posts after mine.
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snutte
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PostPosted: Sat Dec 21, 2002 9:59 pm    Post subject: Reply with quote

Btw, shutting down your computer? Hmm.. never thought of that :wink:
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delta407
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PostPosted: Sat Dec 21, 2002 11:28 pm    Post subject: Reply with quote

kram wrote:
Can you do this once you've already started a build?
Try:
Code:
# emerge openoffice
... emerge doing its thing ...
^Z
# fg; poweroff

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carambola5
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PostPosted: Mon Dec 23, 2002 3:06 am    Post subject: Reply with quote

delta407 wrote:
kram wrote:
Can you do this once you've already started a build?
Try:
Code:
# emerge openoffice
... emerge doing its thing ...
^Z
# fg; poweroff


Sweet! Thanks. I've always wondered why one would suspend a job rather than kill it. I never knew how to restart a job if it had been suspended.
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water
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PostPosted: Mon Dec 23, 2002 9:50 am    Post subject: Reply with quote

And i stil don't know. :?

What does "fg"? And how do i restart after a reboot? Just emerge blahblah again (if blahblah was the emerge i stopped)?
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Lolo-
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PostPosted: Mon Dec 23, 2002 4:42 pm    Post subject: Reply with quote

fg -> foreground
bg -> background, you can launch another process right now
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PostPosted: Sun Sep 07, 2003 8:41 pm    Post subject: Even easier aftertought method... Reply with quote

When emerge is building, I often want to suspend the machine as soon as it's finished... so I just type apm -s<return> into the emerge window. As soon as the build is finished the characters you've typed in will appear on the command line, and get executed.
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Ian
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PostPosted: Sun Sep 07, 2003 10:43 pm    Post subject: Reply with quote

Wow, I never knew about that ^Z command before. That's so cool!!

Yes, I do feel like a little kid who just got another matchbox car :p.
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Ox-
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PostPosted: Sun Sep 07, 2003 11:13 pm    Post subject: Reply with quote

For those who didn't know about ^Z or fg, this is documented in the job control section of the man page for your shell.
Code:
man bash
/JOB CONTROL
or:
Code:
man tcsh
/Jobs

There are a lot of goodies like this in the shells :)
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RobMcM
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PostPosted: Sun Oct 05, 2003 2:22 pm    Post subject: Reply with quote

carambola5 wrote:
delta407 wrote:
kram wrote:
Can you do this once you've already started a build?
Try:
Code:
# emerge openoffice
... emerge doing its thing ...
^Z
# fg; poweroff


Sweet! Thanks. I've always wondered why one would suspend a job rather than kill it. I never knew how to restart a job if it had been suspended.



Just make sure you don't do the stupid thing I did, when towards the end of a KDE emerge I did 'bg; poweroff' instead of 'fg; poweroff' ! Oops, instant shutdown 8O
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bazik
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PostPosted: Sun Oct 05, 2003 10:38 pm    Post subject: Reply with quote

Funny, I submitted a patch for portage which adds PRE- and POST- emerge commands a while ago.
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st589
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PostPosted: Sun Oct 05, 2003 10:46 pm    Post subject: Reply with quote

water wrote:
And i stil don't know. :?

What does "fg"? And how do i restart after a reboot? Just emerge blahblah again (if blahblah was the emerge i stopped)?

I'm wondering this also :o Anyone know?
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PostPosted: Sun Oct 05, 2003 11:20 pm    Post subject: Reply with quote

st12af wrote:
water wrote:
And i stil don't know. :?

What does "fg"? And how do i restart after a reboot? Just emerge blahblah again (if blahblah was the emerge i stopped)?

I'm wondering this also :o Anyone know?


look a couple of posts up for the bash man pages...

When there is a suspended process (like when you've used ^Z on an emerge) then
Code:
# fg
will bring the suspended process back into the foreground which is how it was before you used ^Z.
Code:
# bg
runs it in the background instead meaning it continues to run but you can still type stuff into the shell, like you can when you run something with the ampersand after it:
Code:
# prog&
--- prog running in background ---
# other stuff here

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Squinky86
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PostPosted: Mon Oct 06, 2003 1:19 am    Post subject: Reply with quote

While on this note, another neat thing related to fg and bg but if you're ssh'd and want to close the client computer:
# nohup emerge -uf world &
// <check nohup.txt to make sure package1 is downloaded>
# nohup emerge -u world && halt &
# exit

That's the quickest way to have emerge run on an ssh'd box you want shutdown after the upgrade. If not using ssh, it's good to replace "nohup * &" with "bg" for the emerge -uf world, and have emerge -u world run in sight to make sure nothing goes wrong.

Just my ways of speeding up portage ;).
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Ian Goldby
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PostPosted: Mon Oct 06, 2003 7:05 pm    Post subject: Reply with quote

Another handy emerge script:
Code:
#!/bin/bash
#
# Display system load on the keyboard LEDs
# This must be run from a console (not inside X)

while [ 1 ]
do
  loadavg=`cut -d" " -f1 /proc/loadavg`
  if [[ $loadavg < 0.25 ]] ; then
    setleds -L -num -caps -scroll
  else
    if [[ $loadavg < 0.5 ]] ; then
      setleds -L +num -caps -scroll
    else
      if [[ $loadavg < 0.75 ]] ; then
        setleds -L +num +caps -scroll
      else
        setleds -L +num +caps +scroll
      fi
    fi
  fi
  sleep 5
done

Switch to a console window (e.g. ctrl-alt F1) and run this. Then turn off the monitor and go and do something else. The keyboard LEDs act as a CPU load meter. Poke your head round the door an hour later and if the LEDs are out, emerge has probably finished.
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dub.wav
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PostPosted: Mon Oct 06, 2003 7:21 pm    Post subject: Reply with quote

Ian Goldby wrote:
Another handy emerge script:
Code:
#!/bin/bash
#
# Display system load on the keyboard LEDs
# This must be run from a console (not inside X)

while [ 1 ]
do
  loadavg=`cut -d" " -f1 /proc/loadavg`
  if [[ $loadavg < 0.25 ]] ; then
    setleds -L -num -caps -scroll
  else
    if [[ $loadavg < 0.5 ]] ; then
      setleds -L +num -caps -scroll
    else
      if [[ $loadavg < 0.75 ]] ; then
        setleds -L +num +caps -scroll
      else
        setleds -L +num +caps +scroll
      fi
    fi
  fi
  sleep 5
done

Switch to a console window (e.g. ctrl-alt F1) and run this. Then turn off the monitor and go and do something else. The keyboard LEDs act as a CPU load meter. Poke your head round the door an hour later and if the LEDs are out, emerge has probably finished.

Cool :) Do you know if there's a xfree equivalent of setleds? After a etc-update a few weeks ago, I have to press num lock each time I restart X to be able to type / in rxvt.
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PostPosted: Mon Oct 06, 2003 10:20 pm    Post subject: Reply with quote

my way:
I worte a "emma.bat" like this

emerge -k xine
emerge -k mplayer
emerge -k whateveryouwant
halt


make a chmod u+x and run it as root

The advantage is: when you forgot something, you can add it to the emma.bat before the halt order.

8)
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