1 #!/bin/bash

     2 

     3 NOTIFY='edv@schlittermann.de'

     4 WARNTIME=$(expr 30 \* 24 \* 60 \* 60) # seconds

     5 EXPIRY=$(date -d $(LC_ALL= LANG= gpg -k apt.schlittermann.de|grep -io 'expires:[^]]\+'|grep -io '[[:digit:]]\{4\}-[[:digit:]]\{2\}-[[:digit:]]\{2\}') +%s)

     6 TODAY=$(date +%s)

     7 #echo $EXPIRY

     8 #echo $TODAY

     9 #echo $WARNTIME

    10 #echo $(( $EXPIRY - $TODAY ))

    11 #echo $NOTIFY

    12 if [[ $(( $EXPIRY - $TODAY )) -le $WARNTIME ]]; then

    13   ( echo Subject: apt.schlittermann.de Archive Signing Key is about to expire - please extend expiry date; gpg -k apt.schlittermann.de ) | /usr/sbin/sendmail $NOTIFY

    14 fi