Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>There are commands in Linux that will beep for you. Check out the source code for beep available with Ubuntu (and probably other distros) or have a look at <a href="http://www.johnath.com/beep/beep.c" rel="nofollow noreferrer">http://www.johnath.com/beep/beep.c</a> for another source (it's the same code, I believe).</p> <p>It allows you to control frequency, length and repetitions (among other things) with ease.</p> <p>To actually get it to work, you'll need a script which starts your actual <em>worker</em> program in the background, then goes into a <code>"sleep 60"</code> loop, beeping until it finishes.</p> <p>The following script should be a good start. You run it with something like:</p> <pre><code>beeper sleep 3600 </code></pre> <p>and it runs the <code>sleep 3600</code> in the background, beeping every minute until it finishes.</p> <pre><code>#!/bin/bash $* &amp; pid=$! oldmin=$(date +%M) exf=$pid while [[ $exf == $pid ]] ; do min=$(date +%M) if [[ $oldmin != $min ]] ; then beep oldmin=$min fi exf="$(ps -ef | awk '{print $2}' | grep $pid)" sleep 2 done </code></pre> <p>This is how it works. It runs the arguments as a background process and saves the process ID. Then it loops every couple of seconds, checking for when the minute changes and beeping when that's the case (so the first beep here may be anything up to a minute).</p> <p>The exit from the loop happens when the process disappears from the output of <code>ps</code>.</p> <p>You can even do beeper sleep 3600 &amp; to put the whole lot in the background. To stop the beeping, either kill off the beeper process (if you want the work to continue without beeps) or kill of the worker process itself (which will stop both the work and the beeping).</p>
    singulars
    1. This table or related slice is empty.
    1. PObash to beep if command takes more than 1 minute to finish
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USpaxdiablo
    1. USpaxdiablo
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO1. `$*`? Wordsplitting and pathname expansion will eat your babies. 2. `ps` to check whether a PID's still alive? Nonono, man kill, read about kill -0. 3. Convoluted much?
      singulars
      1. PO
      1. USlhunath
    2. COWhich is why I said the script was a start (I also didn't add other features such as a help message or error checks for whether the command starts). The ps works fine so there's no need to change it, despite other functionality being available (I admit I didn't know about the 'kill -0', it's nice).
      singulars
      1. PO
      1. USpaxdiablo
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload