mytar2

Berkely的学生写的

#!/bin/sh
# Chapter 12 - Using options and arguments
# The second version of the mytar script

#!/bin/sh

USAGE="Usage: `basename $0` [-c|-t] [files|directories]"

if [ $# -lt 2 ] ; then 
    echo "$USAGE" ; 
    exit 1 ; 
fi

case "$1" in
    -t) shift ; TARGS="-tvf" ;
        for i in "$@" ; do
            if [ -f "$i" ] ; then
                FILES=`tar $TARGS "$i" 2>/dev/null`
                if [ $? -eq 0 ] ; then
                    echo ; echo "$i" ; echo "$FILES"
                else
                    echo "ERROR: $i not a tar file."
                fi
            else
                echo "ERROR: $i not a file."
            fi
        done 
        ;;
    -c) shift ; TARGS="-cvf" ;
        tar $TARGS archive.tar "$@" 
        ;;
     *) echo "$USAGE" 
        exit 0 
        ;;
esac
exit $?