Unix作業系統下快速切換目錄的shell

如果你的目錄層次很深的話，這個shell會很方便的直接切換到目的目錄，例如

目前的目錄/usr/home，而目錄desdir在/usr/home/app/local/opp/william/desdir

直接打入

$ cd desdir，便可直接從目前的目錄/use/home切換到/usr/home/app/local/opp/william/desdir

配置一下.profile，加入兩行

. ./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
}