Shell编程之脚本参数传递笔记

shift每次将参数位置向左偏移n位
#!/bin/bash
usage(){
echo "usage:`basename $0` filenames"
}
totalline=0
if [ $# -lt 2 ];then
usage
fi
while [ $# -ne 0]
do
line=`cat $1|wc -l`
echo "$1 : ${line}"
totalline=$[ $totoalline + $line]
shift
done
echo "--------"
echo "total:${totalline}"
#!/bin/bash
all=false
help=false
file=false
verbose=false
while getopts ahfvc: option
do
case $option in
a)
all=true
echo "all is $all"
;;
h)
help=true
echo="help is $help"
;;
f)
file=ture
echo "file is $file"
;;
v)
verbose=true
echo "verbose is $verbose"
;;
c)
c=$optarg
echo "c value is $c"
;;
/?)
echo "`basename $0` -[a h f v] -[c value] file"
;;
esac
done