@<adi https://twtxt.net/user/adi/twtxt.txt> "When calling `$ /bin/sh -c "$(cat foo); foo"`, the `$(cat foo)` part is evaluated in the outer `sh` process, so the actual argument your `sh` invocation is getting is: ``` $ /bin/sh -c "foo() { printf "Hello World" }; foo" ``` You have the function definition there and the call which works. When calling `$ /bin/sh -c '$(cat foo); foo'`, the `$(cat foo)` part is evaluated in your `sh` process, so what's actually happening is `$(cat foo)` is trying to interpret the first "command" from the `foo` file, `foo()` which is obviously `not found`."

Fri, 5 Mar 2021 08:32 Z (3 years ago)

When calling $ /bin/sh -c "$(cat foo); foo", the $(cat foo) part is evaluated in the outer sh process, so the actual argument your sh invocation is getting is:

$ /bin/sh -c "foo() {
       printf "Hello World"
}; foo"

You have the function definition there and the call which works.
When calling $ /bin/sh -c '$(cat foo); foo', the $(cat foo) part is evaluated in your sh process, so what’s actually happening is $(cat foo) is trying to interpret the first “command” from the foo file, foo() which is obviously not found.

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