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|
#! /bin/sh
#
# magic name command file < content
#
bs="# begin krebs magic <$1>"
es="# end krebs magic <$1>"
case $1 in
(print)
echo "$bs"
cat
echo "$es"
;;
(create)
$0 $1 has $3 || $0 $1 print $3 >> $3 < /dev/null
$0 $1 replace $3
;;
(destroy)
if $0 $1 has $3; then
cache"`cat $3`"
echo "$cache" | sed "/^$bs$/,/^$es$/d" > $3
fi
;;
(has)
grep -q "^$bs\$" $3 && grep -q "^$es\$" $3
;;
(replace)
$0 $1 destroy $3 && $0 $1 create $3
;;
(clear)
$0 $1 replace $3 < /dev/null
;;
(*)
echo 'Error 1: You are made of stupid!' >&2
exit 23
esac
|
