How do *you* write portable shell scripts?

[luke dot kendall at cisra dot canon dot com dot au]

Thinking about this:

> It would be nice if exim *itself* reported that running exim-config
> might be a good idea.  (Is exim-config used on other platforms besides
> cygwin?)

.... made me wonder what other people on this list do, to write portable
shell scripts?

In a shell script, is there an accepted way to detect you're running
Windows, so you can make necessary adjustments?

One day, I'd like all the hundreds of scripts that we've written locally
and which are still in use, to work as-is under Cygwin.
Attached is the klunky script I use to help with that.  (These days, it
seems I don't need DEVNULL and DEVTTY, so I confess I've stopped using
them ...)

luke

Attachment: portshell
Description: portshell

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