bash编程之 第六课作业

1、脚本使用格式：

mkscript.sh [-D|--description "script description"] [-A|--author "script author"]  文件名

2、如果文件事先不存在，则创建；且前几行内容如下所示：

#!/bin/bash

# Description: script description

# Author: script author

#

3、如果文件事先存在，但不空，且第一行不是“#!/bin/bash”，则提示语法错误并退出；如果第一行是“#!/bin/bash”，则使用vim打开脚本；把光标直接定位至最后一行

4、打开脚本后关闭时判断脚本是否有语法错误如果有，提示输入y继续编辑，输入n放弃并退出；如果没有，则给此文件以执行权限；

 

 

#!/bin/bash#a1=$1a2=$2a3=$3a4=$4a5=$5desc=""if [ $1 == "-D" -o $1 == "--description" ];then        desc=$2elif [ $3 == "-D" -o $3 == "--description" ];then        desc=$4fiif [ $# -eq 1 ];then        filename=$1elif [ $# -eq 3 ];then        filename=$3elif [ $# -eq 5 ];then        filename=$5else        echo 'please use format: mkscript.sh [-D|--description "script description"] [-A|--author "script author"] filename'        exit 1fiecho "desc=$desc"echo "author=$author"echo "filename=$filename"if ! [ -f $filename ]; then        touch $filename        echo "#!/bin/bash" >> $filename        echo "# Description: $desc" >> $filename        echo "# Author: $author" >> $filename        echo "#" >> $filenameelif [ -s $filename ]; then        str=`grep -n "^#\!/bin/bash$" $filename`        str2=${str%:*}             #find the line_number of #\!/bin/bash        if [ $str2 -ne 1 ]; then                echo "the first line of $filename is not #\!/bin/bash"                exit 2        else                vi + $filename                                trap "myquit" 1 2 3 15        fifimyquit(){        bash -n $filename &> /dev/null        if [ $? -eq 0 ]; then                chmod +x $filename        else                read -p 'there is something wrong, continue to edit ? y/n : ' yesOrNo                if [ $yesOrNo == "n" ]; then                        exit 0                fi        fi}