#! /bin/sh
### crontab - front-end to make INTERACTIVE crontab act like Sun's version
### Usage: crontab -e | -l | -d 
##
##  THIS WON'T LET YOU GIVE A FILENAME ARGUMENT, SO IT'S NOT QUITE LIKE SUN'S...
##  ALSO REQUIRES A FLAG (-e, -l, -d)
cmd=/usr/bin/crontab    # THE SYSTEM VERSION

# MAKE SURE EVERYONE KNOWS WHAT THEY'RE RUNNING:
echo "Running Jerry's crontab command..." 1>&2

case $# in
1)  ;;  # OK
*)  echo "Usage: `/bin/basename $0` -e | -l | -d"; exit 1 ;;
esac

case "$1" in
-[ld]) $cmd $1 ;;   # EXIT WITH STATUS OF REAL COMMAND
-e) # EDIT IT:
    umask 077
    stat=1  # DEFAULT EXIT STATUS; RESET TO 0 FOR NORMAL EXIT
    start=/tmp/CRONTAB$$s   end=/tmp/CRONTAB$$e
    trap 'rm -f $start $end; exit $stat' 0 1 2 15
    $cmd -l > $start || exit    # GET COPY OF CRONTAB
    /bin/cp $start $end
    ${VISUAL-${EDITOR-vi}} $end
    if cmp -s $start $end
    then echo "The crontab file was not changed." 1>&2; exit
    else
        $cmd $end
        stat=$? # EXIT WITH STATUS FROM REAL crontab COMMAND
        exit
    fi
    ;;
*)  echo "Usage: `/bin/basename $0` -e | -l | -d"; exit 1;;
esac