[CentOS] screen detatch

Peter Kjellstrom cap at nsc.liu.se
Tue Jul 22 20:53:33 UTC 2008


On Tuesday 22 July 2008, William L. Maltby wrote:
> On Tue, 2008-07-22 at 18:07 +0100, Luciano Rocha wrote:
> > On Tue, Jul 22, 2008 at 01:02:07PM -0400, David Mackintosh wrote:
> > > The man page for screen says that I can create a detatched screen
> > > running with a set command in it by doing this:
> > >
> > > $ screen -dm $command
> > >
> > > However, it doesn't work.  Screen exits without creating the detached
> > > screen.
> >
> > screen -dm isn't the same as screen -d -m. Try the latter.
>
> Just an FYI...
>
> You *may* be right, however...
>
> "Standards" dictate that "flags" can be combined into a single
> parameter. This is "eased" (debatable IMO) by the "getopts" function in
> bash, getopt(1) command and getopt(3) function call for C et al.

You are right to the extent that posix getopt does indeed allow "-dn" as 
equivalent to "-d -n". But, _lots_ of programs use their own option parsing 
so assuming the above would be very foolish.

> Unfortunately, *some* few programs do not implement this correctly.

That I belive is a major understatement...

/Peter
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