如何获取正在执行的 Perl 脚本的完整路径? [英] How do I get the full path to a Perl script that is executing?

问题描述

我有 Perl 脚本，需要在执行期间确定脚本的完整路径和文件名.我发现根据您调用脚本的方式 $0 会有所不同，有时包含 fullpath+filename，有时只包含 filename.因为工作目录也可能有所不同，所以我想不出可靠地获取脚本的 fullpath+filename 的方法.

I have Perl script and need to determine the full path and filename of the script during execution. I discovered that depending on how you call the script $0 varies and sometimes contains the fullpath+filename and sometimes just filename. Because the working directory can vary as well I can't think of a way to reliably get the fullpath+filename of the script.

有人有解决办法吗?

推荐答案

有几种方法:

• $0 是由提供的当前正在执行的脚本POSIX，如果脚本位于或低于 CWD，则相对于当前工作目录
• 此外，cwd()、getcwd() 和 abs_path() 由 Cwd 模块并告诉您脚本从哪里运行
• FindBin 模块提供了 $Bin &$RealBin 变量，通常是执行脚本的路径；该模块还提供 $Script &$RealScript 是脚本的名称
• __FILE__ 是Perl 解释器在编译期间处理，包括其完整路径.

• $0 is the currently executing script as provided by POSIX, relative to the current working directory if the script is at or below the CWD
• Additionally, cwd(), getcwd() and abs_path() are provided by the Cwd module and tell you where the script is being run from
• The module FindBin provides the $Bin & $RealBin variables that usually are the path to the executing script; this module also provides $Script & $RealScript that are the name of the script
• __FILE__ is the actual file that the Perl interpreter deals with during compilation, including its full path.

我看过前三个($0，Cwd 模块和 FindBin 模块)在 mod_perl 下严重失败，产生无价值的输出，例如 '.' 或空字符串.在这样的环境中，我使用 __FILE__ 并得到使用 File::Basename 模块的路径:

I've seen the first three ($0, the Cwd module and the FindBin module) fail under mod_perl spectacularly, producing worthless output such as '.' or an empty string. In such environments, I use __FILE__ and get the path from that using the File::Basename module:

use File::Basename;
my $dirname = dirname(__FILE__);

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