Shell implementation of exec-able builtins

[Jakub Wilk via austin-group-l at The Open Group]

In XRAT C.1.7 Built-In Utilities[0], it is said that you can implement
exec-able builtins with the following shell script:
  $0 "$@"

This wouldn't actually work: $0 is the absolute path, so the script 
would recurse indefinitely.

You should use something like ${0##*/} instead of $0.


[0] 
https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xcu_chap01.html#tag_23_01_07

--
Jakub Wilk