学步园

# The name of the ls program, please use
# the absolute path, otherwise, there
# may be get some strange errors.
#
LSPROG="/bin/ls"

# COLOR DEFINE
# ============
#
DIR="/033[01;34m"
EXE="/033[01;32m"
DEV="/033[01;33m"
LNK="/033[01;36m"
ZIP="/033[01;31m"
SOCK="/033[01;35m"
NULL="/033[00m"

ROOT=${1:-.}
TRUE=0
FALSE=1
LAYERS=0
FILECOUNT=0
DIRCOUNT=0

# print_dash
# ==========
# Print the structure lines
#
print_dash()
{
    local i=0
    local num=$1
   
    while [ $i -lt $num ]; do
        echo -n "|"
        for j in 1 2 3; do
            echo -n " "
        done

        i=`expr $i + 1`
    done

    echo -n "|-- "
}

# ispkg
# =====
# Test if the file is a package like:
# .gz .tar .tgz .tar.gz .zip .rar .rpm
# and etc.
#
ispkg()
{
    local f=$1
    local i   

    # Package extension list, you can add your coustom
    # extensions in it.
    #
    local pkg__ext=".gz .tar .tgz .tar.gz .zip .rar .rpm"

    # if the file's suffix contain any package extension
    # then cut it.

    for i in $pkg__ext; do
        f=${f%$i}
    done

    if [ "$f" != "$1" ]; then
        return $TRUE
    else
        return $FALSE
    fi
}

# mktree
# ======
# The main function, that print the
# dictionary structure in dos's tree
# command style. It's runs in nesting.
#
mktree()
{
    local f
    for f in `$LSPROG -1 $1 2> /dev/null`; do
        f=${f%/}
        f=${f##*/}
   
        # If dictionary then print it and enter
        # the nesting block.
        if [ -d $1/$f ]; then
            print_dash $LAYERS
            echo -e "${DIR}$f${NULL}"
            DIRCOUNT=`expr $DIRCOUNT + 1`

            LAYERS=`expr $LAYERS + 1`
            mktree $1/$f
        else
            print_dash $LAYERS
            # file is a symbol link
            if [ -L $1/$f ]; then
                echo -e "${LNK}$f${NULL}"
            # file is executable
            elif [ -x $1/$f ]; then
                echo -e "${EXE}$f${NULL}"
            # file is a device
            elif [ -c $1/$f -o -b $1/$f ]; then
                echo -e "${DEV}$f${NULL}"
            # file is a socket
            elif [ -S $1/$f ]; then
                echo -e "${SOCK}$f${NULL}"
            # file is a package
            elif `ispkg $f`; then
                echo -e "${ZIP}$f${NULL}"
            else   
                echo -e "$f"
            fi
           
            FILECOUNT=`expr $FILECOUNT + 1`
        fi
    done

    LAYERS=`expr $LAYERS - 1`
}

echo $ROOT
mktree $ROOT
echo "/`"
echo "$DIRCOUNT directories, $FILECOUNT files"

显示效果：

/home/matthew/
|-- src
|   |-- asm
|   |   |-- hello.s
|   |   |-- shell.s
|   |   |-- hello
|   |   |-- shell
|   |-- shell
|   |   |-- tree.sh
|-- xfce.tar.gz
|-- mbox
`
3 directories, 7 files