Re: exported SHELLOPTS gives error message from sh

[Chet Ramey]

> On Mon, Oct 10, 2011 at 11:06:16AM -0400, Len Giambrone wrote:
> > I understand that.  But if you change all your scripts to use
> > 
> > #!/bin/bash
> > instead of
> > #!/bin/sh
> > 
> > your scripts will fail when bash isn't installed.
> 
> If you use bash features in your script, then you must ensure that the
> script is executed by bash, and not by /bin/sh.  There are many ways you
> can accomplish this:

Len is using Mac OS X (darwin), which does have bash-3.2 installed as
/bin/sh.  He may have upgraded that to bash-4.1 or bash-4.2.  I haven't
looked at his report in detail yet, but I suspect the majority of the
problems are the result of bash being Posix-conformant when called as
/bin/sh.  Depending on when that matters -- initialization, startup
files, executing scripts -- he may be able to get around it by running
`set +o posix'.  As I said, I'll have to look at it more closely.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/