unix下快速切换目录的shell

作者：myq12   

如果你的目录层次很深的话，这个shell会很方便的直接切换到目的目录，例如
当前目录/usr/home，而目录desdir在/usr/home/app/local/opp/william/desdir
直接打入
$ cd desdir，便可直接从当前目录/use/home切换到/usr/home/app/local/opp/william/desdir
配置一下.profile，加入两行
. ./bin/chdir
alias cd='chdir'
file：chdir
#####################################################
# auto find your directory
# Writer: william 2006 beijing
# add the following two line in $HOME/.profile
# . ./bin/chdir
# alias cd='chdir'
#####################################################
chdir()
{
if [ -z "$1" ]  then
        cd
        PS1="[$PWD]"
        export PS1;
        return
elif [ "$1" = - ]  then
        cd -
        PS1="[$PWD]"
        export PS1;
        return
else
        if [ -d "./$1" ]  then
        cd ./$1
        PS1="[$PWD]"
        export PS1;
        return
        fi
fi

for LINE in `find $HOME -type d -print | grep -c \/$1$`
do
if [ $LINE -eq 0 ]  then
        echo "your directory $1 is not exsit($LINE)!"
        return
fi
done

for Dir in `find $HOME -type d -print | grep \/$1$`
do
    if [ $LINE -gt 1 ]  then
        if [ ! -d "$Dir" ]  then
        echo "$Dir is not a directory"
        return
        fi

        printf "$Dir\t\t...do you want to go? default(y)"
        read YESNO
#       echo "(y/n)="$YESNO

        if [ -z "$YESNO" ]  then
                YESNO=y
        fi

        case "$YESNO" in
                [yY]|[yY][eE][sS])
                        YESNO=y ;
                [nN]|[nN][oO])
                        YESNO=n ;
                *)
                        YESNO="" ;
        esac

        if [ "$YESNO" = y ]  then
                cd $Dir
                PS1="[$PWD]"
                export PS1;

                return
        else
                continue
        fi
  else
                cd $Dir
                PS1="[$PWD]"
                export PS1;
                return
  fi
done
}