#!/bin/bash # Script to output the total size of requested filetype recursively # Error out if no file types were provided if [ $# -lt 1 ] then echo "Syntax Error,Please provide at least one type,ex: sizeofTypes {filetype1} {filetype2}" exit 0 fi #set first filetype types="-name *."$1 #loop through additional filetypes and append num=1 while [ $num -lt $# ] do (( num++ )) types=$types' -o -name *.'$$num done echo "TYPES="$types find . -name '*.'$1 | xargs du -ch *.$1 | grep total
我遇到的问题是在这里：
#loop through additional filetypes and append
num=1
while [ $num -lt $# ]
do
(( num++ ))
types=$types' -o -name *.'>>$$num<<
done
我只想迭代所有不包括第一个的参数,应该很简单,但是我很难想出如何使这项工作
从bash手册页：
原文链接：https://www.f2er.com/bash/386119.htmlshift [n]
The positional parameters from n+1 ... are renamed to $1 ....
Parameters represented by the numbers $# down to $#-n+1 are
unset. n must be a non-negative number less than or equal to
$#. If n is 0,no parameters are changed. If n is not given,it is assumed to be 1. If n is greater than $#,the positional
parameters are not changed. The return status is greater than
zero if n is greater than $# or less than zero; otherwise 0.
所以你的循环看起来像这样：
#loop through additional filetypes and append while [ $# -gt 0 ] do types=$types' -o -name *.'$1 shift done
