tests/misc/coreutils.sh: Fail with invalid binary name by oech3 · Pull Request #10258 · uutils/coreutils

Setup
  $ ln -nsf src/coreutils foo

Before
  $ ./foo; echo $?
  foo: unknown program ‘foo’
  Try './foo --help' for more information.
  1
  ./foo --version; echo $?
  coreutils (GNU coreutils) 9.9.172-01993
  0

After
  $ ./foo; echo $?
  coreutils: unknown program 'foo'
  1
  $ ./foo --version; echo $?
  coreutils: unknown program 'foo'
  1

* src/coreutils.c (main): Don't process options if
we don't know they're intended for the multi-call binary.
Otherwise `foo --version` would return true, even though
foo was symlinked to the multi-call binary, but not supported.
* tests/misc/coreutils.sh: Add test cases.
* NEWS: Mention the change in behavior.

* tests/misc/coreutils.sh: Be more flexibile by using `command -v`
to identify the binary to be executed, rather than linking
directly to the built binary.