Re: Check existence of a directory?

[James Rich <james@xxxxxxxxxxx>]

On Fri, 9 Jul 2004, Scott Klement wrote:

> > Lots of people have responded to this one.  Surprisingly, none have
> > suggested what I think is the easiest solution by far.  With QSH:
>
> True, you could do it in QShell, but there's a lot of overhead there if
> you're calling it from a CL program.  Still, it's hard to make it easier
> than:
>
>   STRQSH CMD('test -d /OINK')

Another brilliant example of why QSH rocks!  Remember, you have to check
the return status of STRQSH to see if the directory actually exists or
not.  If it does exist, STRQSH will end with an exit status of 0.  If it
doesn't, STRQSH ends with an exit status of 1.

Using the same STRQSH command you can use the if syntax I posted
previously like this:

STRQSH CMD('if [ -d /tmp ] ; then echo "the directory exists"; fi')

Mind you, the "echo" command is probably not what you want since it starts
up a QSH terminal session.  But you can replace it with any command you
want.  Even multiple commands, separated with semicolons, will work.  You
can also use an else clause:

STRQSH CMD('if [ -d /asd ] ; then echo "the directory exists"; else echo
"it does not exist"; fi')

All that is one line.  There's lots you can do.  And there are plenty of
books all about shell programming.  But for just finding out if a
directory exists, nothing beats QSH's 'test -d'.

James Rich

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