Re: Substring search in dash [ _NOT_ bash ] shell

[Richard Owlett <rowlett@cloud85.net>]

On 9/26/2016 10:42 AM, Greg Wooledge wrote:
> On Mon, Sep 26, 2016 at 10:39:59AM -0500, Richard Owlett wrote:
> > #      string if [ "`hostname`" = bob ]; then echo bob.cfg; fi
> >
> > I need for the case when evaluates to marybobsam .
> > I can find examples in bash shell, but I need dash.
>
> Are you asking how to check for the substring "bob" in your input,
> in POSIX sh?  Use case, and a glob:
>
> case $input in
>    *bob*) echo "Bob found." ;;
> esac
>
> case $(hostname) in
>    *bob*) echo "I must be a Bob." ;;
> esac

Thank you. I was expecting an if...fi construct.
Is dash documented anywhere?
All I've found are pages saying that some "bashisms" do not work 
in dash :<

I've no experience with bash (or any shell) and in any case I'm 
constrained to using dash as I'm working with preseed.cfg .