http://blog.chinaunix.net/u2/81965/showart_1335087.html
#!/bin/sh
#
# tree.sh
# A tool that display the dictionary structure in dos’s
# tree command style.
# Tested on slackware, openbsd, netbsd, freebsd.
#
# Just for fun.
#
# 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=”33[01;34m”
EXE=”33[01;32m”
DEV=”33[01;33m”
LNK=”33[01;36m”
ZIP=”33[01;31m”
SOCK=”33[01;35m”
NULL=”33[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”
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