#!/bin/bash# $IFS 處理空白與處理其他字符不同. output_args_one_per_line(){  for arg  do echo "[$arg]"  done}echo; echo "IFS=\" \""echo "-------"IFS=" "var=" a  b c   "output_args_one_per_line $var  # output_args_one_per_line `echo " a  b c   "`## [a]# [b]# [c]echo; echo "IFS=:"echo "-----"IFS=:var=":a::b:c:::"               # 與上邊一樣, 但是用" "替換了":".output_args_one_per_line $var## []# [a]# []# [b]# [c]# []# []# []# 同樣的事情也會(huì)發(fā)生在awk的"FS"域中.# 感謝, Stephane Chazelas.echoexit 0