[CentOS] Real sh? Or other efficient shell for non-interactive scripts

On 04/24/2015 09:59 AM, Steve Lindemann wrote:
>
> A script with no shebang will run in the environment of the account
> running the script.

Bad test on my part, apparently.

$ python
 >>> import os
 >>> os.execv('/home/gmessmer/test', ('test',))
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
OSError: [Errno 8] Exec format error

So a script with no shebang will fail when the shell calls exec().  If 
that's so, then starting the executable script with an interpreter is 
probably shell-defined.  In other words, each shell might do something 
different to run a script that has no shebang.  Most probably do default 
to trying itself as the interpreter first.  Interesting.