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I need make something like

$ source /etc/environments # called in bash.sh script

Of course after script finished no changes apply to shell. I know this is tricky if because child process cant modify parent 'bash' process. But May be another way to do so?

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2 Answers 2

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3

You should use

source bash.sh

Then it runs in the original shell instead of a child process.

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As you have observed yourself a child process cannot set persistent environment variables. One of the usual work around are writing something like this to stdout:

% cat my_script
#!/bin/bash
echo "export MY_VAR=1234"

And then used in a command substitution:

eval "$(./my_script)"

An example of such script is dircolors

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7 Comments

@123 It will work with bash scripts, but nothing else.
I ment that my_script needs to be written in the same language as where it's sourced, and no $(...) is not bash only.
I meant not portable,not just bash, sorry. But this still doesn't make any sense to do,
@123 OP asks for a way for a child process to set environment variables in the parent shell. I assume he want a general solution that also works when the child process is machine code, perl, python, ... Unless you can show me a way to source a python script, I will hold at this method.
What i meant is, I can't see a reason to use an external process to set variables in the current shell. You can run python et al. inside a sourced script and have them output the values you want anyway.
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