Create temp files and catch ctrl-C signal to cleanup

Sometimes temporary files are required, but it’s important to cleanup when the script is over even when ctrl-c is pressed to abort the running script. Below is the sequence for creating temp files with mktemp and cleaning them up when ctrl-c is pressed:

# Decompress the log files in a tmp file:
TMPFILE=$(mktemp -p /dev/shm)
zcat -f $LOGFILE > $TMPFILE

# cleanup function
# see: http://goo.gl/2aUQc
trap "rm $TMPFILE; exit" SIGHUP SIGINT SIGTERM

The example above, decompress some log files in a temp file located in ram disk /dev/shm.