Linux如何从父目录执行bash脚本？

Question

I have a script called GenerateDTIPubSub and if I call it from its file location using the terminal (which I opened in the same file location):

./GenerateDTIPubSub --DTIFramePubSub

works fine.

How do I now execute the script while in the folder above? Example: ./cfg/GenerateDTIPubSub --DTIFramePubSub

Which does not work(reminding you that I've also opened the terminal in the folder above)

edit: It executes but the bash script but can not find the perl script that it executes unless the bash script is executed from its directory (if that makes sense)

./GenerateDTIPubSub --DTIFramePubSub GenerateDTIPubSub then calls the DTIFramePubSub function that calls a perl script, this path works fine

./cfg/GenerateDTIPubSub --DTIFramePubSub this does not work, it can't find the perl script

Can't open perl script "Scripts/DTIPubSub.pl": No such file or directory

but the path for the perl script does not change only the bash file path

Answer 1

To work around the problem, you can use the following:

( cd cfg; ./GenerateDTIPubSub --DTIFramePubSub )

The parens create a subshell to avoid changing the current work directory for anything but the perl process.

---

The underlying problem is that GenerateDTIPubSub assumes the current work directory is the script's directory. What follows are instructions on how to fix that.

1. The quick and dirty approach:

   Add the following:

    use FindBin qw( $RealBin ); BEGIN { chdir($RealBin); } 

2. The more sensible approach:

   First, add the following:

    use FindBin qw( $RealBin ); 

   Then replace

    "Scripts/DTIPubSub.pl" 

   with

    "$RealBin/Scripts/DTIPubSub.pl" 

   You may need to do multiple similar fixes in the code.

Answer 2

It seems you must (temporarily) change the current working directory before calling your script. You can do that with the following technique

cd cfg && ./GenerateDTIPubSub --DTIFramePubSub

Answer 3

问题是基本脚本中的Perl脚本的路径需要更改为包含/cgf