On Thu, Mar 22, 2012 at 12:06:24PM +0000, Tim Dickson wrote:
> put echo "$-" in a oneline bash script called test and make executable
> *./test*
> output is *ehB*
> this should include the "i" in the output as the shell _is_ interactive
No, a script is by definition a non-interactive shell.
> *echo hi|./test *
> output is *e*
> this is as expected input is not from a tty
Are you confusing "interactive" with "has a terminal as standard input"?
> either the functionality of bash is not correct or the meaning of
> interactive is not clear.
>From the manual,
An interactive shell is one started without non-option arguments and
without the -c option whose standard input and error are both
connected to terminals (as determined by isatty(3)), or one started
with the -i option.
If you run a script like ./test, then the kernel invokes bash with the
script name as a non-option argument (i.e., "/bin/bash ./test"). So
that shell is not interactive.
