测试环境为：Ubuntu 14.14.2 LTS updates
主要解决了特殊用法（为制定参数，. ，..，*的使用）
-d 检测是否为directory时，如果参数为空，也会被错误的认为目录，这是bash的一个诟病吗？应该吧，不过结合-z选项就可以解决。但是问题的关键是我以为-d是会识别的，其实我高估了-d，[see line 34-36]
function lz() {
function du_dir() {
echo -e "\033[01;33m$1\033[00m" # $((RANDOM%6+1))
(cd $1; ls -1 2>/dev/null | sed -e 's/^/"/' -e 's/$/"/'| xargs du -h -d 0 2>/dev/null)
}
function du_file() {
(ls -lha $1 | awk '{print $5,$9}')
}
function getpath() { # support . and .. as the special path
cd $1
echo `pwd`
}
function usage(){
echo -e " \033[01;37musage:\033[00m le [dir]/[file] ..."
echo " if no arguement is given, 'lz' will print the current working dir"
echo " .(current dir), ..(parent dir), *(metachar) are supported"
echo -e "\n -V/-h for this help page"
echo -e " \n--------------------------\n lz v0.1 by Ray Lee - March 30, 2016"
echo -e " updates:\n 1.clone 'le' as 'lz', new feature added\n 2.empty parameter doesn't work"
echo -e " ^\n lz v0.2 by Ray Lee - may 28, 2016"
echo -e " updates: \n 1.make the empty arg work, printing the current directory\n 2.-V and -h works\n 3.add comments for code block\n 4.modify the help page"
}
default='.'
args=($@)
if [[ ${#args[@]} -gt 1 ]]; then
## the * meta means all the things in the current directory, length of it is gt 1 when current dir contains
## more than 1 thing, 1 if there is only one thing, le 1 when empty
##
for each in ${args[@]}; do
[ -d $each ] && du_dir `getpath $each` || du_file `getpath $each`
done
elif [ ! -z $1 ]; then
## The oddness of the -d option for file test is that it recognises the empty as a directory
## So the -z should be used to make -d solid for empty args.
##
if [ -d $1 ]; then # support . and .. as the special path
du_dir `getpath $1`
elif [[ $1 == '-V' ]]; then
usage
elif [[ $1 == '-h' ]]; then
usage
fi
else
du_dir `getpath "."`
fi
}
Results：
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