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 Forum index » Off-Topic Area » Programming
howto capture the history of the inittab consoles ?
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Karl Godt


Joined: 20 Jun 2010
Posts: 2732
Location: Kiel,Germany
PostPosted: Tue 31 Jan 2012, 12:51    Post subject:  howto capture the history of the inittab consoles ?  
Hello !

I want at shutdown to write the history of each enabled console to the .history file .

I have constructed a rc.shutdown.local that gets sourced by rc.shutdown at the beginning >

Code:
currentconsole=`tty`
echo "currentconsole='$currentconsole'"
curr="$currentconsole";c=0
if [ "$curr" != '/dev/tty1' ];then chvt 1;fi
cons=`grep -oe '^tty[0-9]*' /etc/inittab`
CONS=`echo "$cons" | grep -o '[0-9]'`
maxcons=`echo $CONS|rev|sed 's/^[[:blank:]]*//'|cut -f 2-99 -d ' '|rev`
for con in $maxcons ; do c=$((con+1));chvt $c
#echo "`history|awk '{print $2}'`" >> .bash_history
#echo "`history|awk '{print $2}'`" >> .ash_history
echo -en "\r" >/dev/tty$c
echo -e "\n" >/dev/console
tty >>/dev/tty$c
echo $c >>/dev/tty$c
echo >>/dev/tty$c
read -e -n1 -p "History Rescue, hit [2x] any key " k 1>/dev/tty$c 2>&1 </dev/tty$c
#echo "`history|awk '{print $2}'`" >> .history
echo $k
echo $k >>/dev/tty$c
history -w
sleep 1s;
echo >>/dev/tty$c
read -e -n1 -p "Console Switch, hit [2x] any key " l 1>/dev/tty$c 2>&1 </dev/tty$c
echo $l
echo $l >>/dev/tty$c
echo "Sleeping now 5 seconds....." >>/dev/tty$c
sleep 5s
#[ "$c" -gt '2' ] && deallocvt $((c-1));
done
#deallocvt $c
chvt 1

#echo "`history|awk '{print $2}'`" >> .bash_history
#echo "`history|awk '{print $2}'`" >> .ash_history
#echo "`history|awk '{print $2}'`" >> .history
history -w


First of all i want to know why i have to type 2x key to get anything to work despite the waiting for command input of the particular console .

As a side note: deallocvt does not work for consoles opened by /etc/inittab .
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Karl Godt


Joined: 20 Jun 2010
Posts: 2732
Location: Kiel,Germany
PostPosted: Thu 15 Mar 2012, 23:55    Post subject:  
apparently i have found a solution : kill -1 `pidof sh`
automatically writes to the history file .
since the inittab respawns these consoles get opened again .
this works for all opened consoles , except the current one .
killing that console would also stop poweroff OR reboot .

Code:
currentconsole=`tty`
echo "currentconsole='$currentconsole'"
curr="${currentconsole//\/dev\//}"

CONS=`ps -f -C sh |grep tty|grep -vw "$curr" |awk '{print $2}'`
for pid in $CONS;do
kill -1 $pid
sleep 1s;sync
done
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disciple

Joined: 20 May 2006
Posts: 6199
Location: Auckland, New Zealand
PostPosted: Fri 16 Mar 2012, 20:01    Post subject:  
Is this about the history of which commands you run in the consoles, or the output of those commands?
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Karl Godt


Joined: 20 Jun 2010
Posts: 2732
Location: Kiel,Germany
PostPosted: Sat 17 Mar 2012, 08:23    Post subject:  
Its about the commands .

But if I accidentally copy the output of a X-term console and paste it into it instead of a text editor , the console would try to run the new copied input with a lot of "command not found" messages .

Then i would have (parts of) the console output in the .[[b]ash_]history file .

The simple no-X console writes to .history as far as i experienced .
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