ipcs in awk-script

[Inesa Clinko]

Please help me:
I want to find unused shared memory resources with "ipcs -smo" and remove it with "ipcrm", using awk-script from command line. If it needed, I can use temp.file.

Please show me an example.

Regards,Inesa

[Steven E. Protter · Accepted solution]

Hello Inesa,

ipcs -smo | grep | > /tmp/temp.file

while read a b c
do
ipcrm "-$a $c"
done < /tmp/temp.file

SEP

[A. Clay Stephenson]

Be care using this, NATTCH = 0 is a necessary but not necessarily sufficient condition for the removal of a shared memory identifier. It all depends upon how the software that uses the shared memory was written. For example, it is not unusual for an initialization program to run and setup a shared memory segment and then detach and exit. In that case, NATTCH = 0 but additional programs could run later expecting that shared memory identifier to be available and crash. This is a fairly common method for programs that might require long initializations otherwise.

[Sandman!]

Inesa,

Yet another way to do this would be:

# ipcs -smo | grep | awk '{system("ipcrm -"$1" "$2)}'

regards!

[Muthukumar_5]

Use like this:

ipcs -smo | awk '/^m|^s/ { print "ipcrm -"$1" "$2 }' | ksh

or

ipcs -smo | awk '/^m|^s/ { system ( "ipcrm -"$1" "$2); }'

hth.