dirs

Berkely的学生写的

#!/bin/sh
# Chapter 14 - Sharing data between functions
# This function implements the csh dirs command that lists
# the current directory stack.
# You will need to "source" this file into your environment
# using the . command.

dirs() { 

    # save IFS, then set it to : to access the
    # the items in _DIR_STACK individually.

    OLDIFS="$IFS"
    IFS=:

    # if there are directories on the stack print each 
    # one followed by a space

    if [ -n "$_DIR_STACK" ] ; then
	for i in $_DIR_STACK 
   	do
            /bin/echo "$i \c"
    	done
    fi

    # add a new line after all entries in _DIR_STACK 
    # have been printed

    echo

    # restore IFS

    IFS="$OLDIFS"
}