fixed runtime

[szepeviktor]

Are you interested in implementing a time limit of runtime like in
https://github.com/szepeviktor/debian-server-tools/blob/master/monitoring/hdd-seeker/seeker_baryluk.c

Thank you!

[szepeviktor]

seekmark -e &
sleep 30; kill $!

This does not display output. Could you catch a SIG?