Thanks for that and all the other replies.  Seems that the leading "./" will
fix it although I'll have to wait until tomorrow to try it out.

I'm slightly confused about where "access" or "fopen" are coming from.  I
explicitly linked with what I thought was the C run-time/library.  Hmmm - I
guess I must be linking with the ccxl library rather than the c89 one from
what you are saying.

It's a fairly small project so using peoples suggestions to prefix with "./"
if the first character isn't "/"  (it's defined by the user in this case so
I'll have to check) will be fine.  But if I had a lot of code I might want
to link with the c89 (POSIX only) library - is there a way to do that?  Just
curious now.  Maybe it's a matter of linking with /lib/libc.a or something
similar?

I fixed the problem with the code where access() didn't want to work on a
directory.  The real code was adding "/." at the end for some reason - not
sure why as it makes no difference to UNIX but the ccxl library must have
not liked it so I removed it.  So I've deleted a line adding "/." to the
directory name, now I've got to add some code to stick it at the start!
(well, "./" to be exact)

Thanks for all the replies - very helpfull.

I've been taken off the project to do other work so I'll be off for a while.

Cheers.

Peter.


>From: Gavin Scott <[log in to unmask]>
>Reply-To: Gavin Scott <[log in to unmask]>
>To: [log in to unmask]
>Subject: Re: [HP3000-L] HFS, C and COBOL
>Date: Tue, 13 Aug 2002 10:13:23 -0700
>
>Tom writes:
> > Actually, "TGAFORMS/FORMS1/FRED" is NOT a "relative" path --
>
>It is if you pass it to a Posix interface, i.e. a c89 compiled/linked
>program.
>
>It you pass it to an MPE Intrinsic or CCXL compiled/linked program then it
>will assume "MPE escaped" file naming and it will look like the MPE file
>TGAFORMS with a lockword of FORMS1.
>
>Ultimately all opens devolve to something like HPFOPEN which has an option
>to say how the filename should be interpreted.
>
>Most libraries use the MPE escaped option which says that if the name
>starts
>with a dot "." or a slash "/" then it is a Posix name, otherwise it's an
>MPE
>name.  The notable exception are the Posix libraries and by extension GCC
>and c89 programs *and* most programs compiled using them (Apache, Samba,
>etc.), which specify Posix-only which means that A/B will be treated as a
>Posix path rather than an MPE filename/lockword.
>
>There's also an option for MPE-only syntax, though offhand I can't think of
>anything that commonly uses this, since normal MPE names don't start with a
>. or a / and so you and almost always use MPE escaped syntax for any MPEish
>program but you generally have to use Posix-only for programs that
>originated on non-MPE platforms to keep from breaking them.
>
>The CCXL command and its related link variants are a little odd in that
>they
>predate the Posix subsystem and so do the best job they can of compiling C
>programs without any knowledge of the Posix world.  This means that CCXL
>generally leaves you with a pure MPE program using MPE semantics for
>everything.
>
>G.
>
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