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Crontab spawning multiple at processes

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# 8  
Old 08-18-2008
Something like

Code:
atq | cut -f1 | xargs atrm

# 9  
Old 08-18-2008
Quote:
Originally Posted by era
Something like

Code:
atq | cut -f1 | xargs atrm

Brilliant - this worked - thanks!! :-)
# 10  
Old 08-18-2008
Update: Scheduling recordings via "at,"

at -f ~/recordings/record_tv_test 6:15 pm Aug 18 2008

where record_tv_test is an executable bash file (below) works fabulously (as did the command to delete all those 100's! of "un-needed" at commands, that accumulated via cron)!

Thanks again - you guys are great! Greg :-)

#!/bin/bash

tuner=/dev/video0
# or /dev/video1 for my 2nd Hauppauge PVR-500 card
channel=58
duration=00:05:00 # hh:mm:ss
record_directory=/media/sdb1/recordings/UNPROCESED/
file_name=test

ivtv-tune -c $channel -d $tuner

sleep 1

mencoder pvr:// -tv \
driver=v4l2:width=640:height=480:input=0:device=$tuner:norm=NTSC:chanlist=us-cable:outfmt=yuy2:adevice=/dev/dsp:audiorate=44100 \
-vf lavcdeint \
-ovc lavc \
-lavcopts vcodec=mpeg4:vbitrate=4500:keyint=3 \
-oac mp3lame \
-lameopts br=128:cbr:mode=3 \
-ffourcc divx \
-endpos $duration \
-quiet \
-o $record_directory$file_name"_"`date +%A_%B_%d_%Y_%I:%M_%p`.avi
# 11  
Old 08-18-2008
Quote:
Originally Posted by Vi-Curious
When you set up your cron, you set it to call the script every minute. So, every minute, cron calls your script and your script schedules an at job. When that time arrives, the system will start running all of those queued up jobs scheduled by at.

Once you have passed the time specified in the at command, cron is still going to call your script (every minute) and it is going to try to schedule the at. Since the time is now passed, those at jobs should not be scheduled, but cron and the script are going to continue to run. How do you expect them to know that the time is expired? At will know the time is already expired and refuse to schedule a new job but everything leading up to that point is still going to happen.
Well explained Vi-C. This is what I thought was happening, but couldn't put into words the way you did. Smilie
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