如何在rpm scriptlet中获取要卸载的版本？

该%脚本从相关版本叫做rpm文件。因此，如果您从1.0版升级到1.1版，则安装前/安装后脚本将从rpm的1.1版运行，而安装前/安装后卸载脚本则从1.0版运行。

这使脚本很容易正确地处理自己的版本。

例如，这是SPEC文件的摘录

%pre
echo Pre called with version %{version}-%{release}

%post
echo Post called with version %{version}-%{release}

%preun
echo Pre-un called with version %{version}-%{release}

%postun
echo Post-un called with version %{version}-%{release}

它们非常简单，仅用于演示这一点。建立rpm时，这些值将嵌入到rpm中

例如

% rpm -q --scripts -p sweh-test-1.0-0.x86_64.rpm 
preinstall scriptlet (using /bin/sh):
echo Pre called with version 1.0-0
postinstall scriptlet (using /bin/sh):
echo Post called with version 1.0-0
preuninstall scriptlet (using /bin/sh):
echo Pre-un called with version 1.0-0
postuninstall scriptlet (using /bin/sh):
echo Post-un called with version 1.0-0

现在，让我们安装此软件包的1.0.0版本：

% sudo rpm -i sweh-test-1.0-0.x86_64.rpm 
Pre called with version 1.0-0
Post called with version 1.0-0

到目前为止，还不错。运行前/后安装脚本。

现在，让我们升级到1.1版：

% sudo rpm -U sweh-test-1.1-0.x86_64.rpm
Pre called with version 1.1-0
Post called with version 1.1-0
Pre-un called with version 1.0-0
Post-un called with version 1.0-0

注意调用的顺序和版本号；调用pre / post安装，版本发行版与新版本匹配，然后使用旧版本号调用pre / post卸载。

因此，您的想法是不需要获取此信息，可以通过使用%宏将其直接包含在rpm规范文件中。