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How to create binary file from shell script

Mar 21, 2019 pm 03:43 PM
shell

在使用Linux系统时,我们都会使用许多命令。大多数命令以二进制格式在/bin、/sbin、/usr/bin、/usr/sbin等目录中可用。作为系统管理员,我们编写了许多shell脚本来完成一些任务或使它们自动化。

How to create binary file from shell script

本文将介绍创建shell脚本的二进制文件,因为没有人可以看到脚本的源代码,我们可以将它们用作命令。要从脚本创建二进制文件,我们使用SHC编译器。

请按照以下步骤执行此操作。

步骤1:先决条件

首先,需要为SHC编译器安装所需的包。

对于Ubuntu,Debian和LinuxMint

$ sudo apt-get install libc6-dev
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对于CentOS,RHEL和Fedora

$ sudo yum install glibc-devel
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步骤2:下载并安装SHC

从SHC编译器的官方网页或使用以下命令下载最新的源代码,并在您的系统上提取。

$ cd / usr / src
$ wget http://www.datsi.fi.upm.es/~frosal/sources/shc-3.8.9.tgz
$ sudo tar xzf shc-3.8.9.tgz
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现在编译系统上的SHC源代码并使用以下命令安装它。

$ cd shc-3.8.9
$ make
$ make install
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步骤3:创建shell脚本

让我们根据需求创建一个shell脚本,或者跳过这个步骤(如果已经创建了)。对于本文,我们已经创建了下面的示例脚本,它添加了命令行参数上给定的整数值,并显示了它们的总和。

vim script.sh
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#!/bin/bash

total=0

for i in $@; do
   if [ ! -z "${i##[0-9]*}" ]; then
	echo "Please enter numeric only"
	exit 1
   fi
   total=$(($total + $i))
done

if [ $total -eq 0 ]; then
    echo "Plesae execute script like: $0 10 20 30"
    exit 0
fi

echo $total
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步骤4:创建脚本的二进制文件

在这个阶段,我们已经安装了SHC编译器,并有一个名为script.sh的shell脚本。使用下面的命令创建脚本的二进制文件。

$ shc -T -f script.sh
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上面的命令将在当前目录中创建两个文件。其中一个是script.sh.x.c,它是脚本中的C语言格式。第二个是script.sh.x,它将采用二进制格式。

步骤5:测试二进制脚本

如果试图打开二进制格式的脚本,将看到它不是可读的格式。

现在将该脚本移到/usr/bin目录下,以便在系统中的任何位置使用。同时从文件名中删除.sh.x。因此,它将以简单的名称实现。同时为所有人设置执行权限

$ mv script.sh.x / usr / bin / script
$ chmod + x / usr / bin / script
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现在从系统中的任何位置输入命令'script'。将看到与shell脚本相同的结果。

$ script 10 20 30 
60
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