From:	Eric Backus <ericb AT lsid DOT hp DOT com>
Subject:	Re: How to obtain full path name
To:	kunst AT prl DOT philips DOT nl
Date:	Tue, 9 Mar 93 16:46:38 PST
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu (djgpp)
Mailer:	Elm [revision: 66.25]

> Does anyone know how to obtain the full path name of the current
> directory which works on (every) --> UNIX <-- (POSIX preferably) 
> and therefore also on DJGPP ?

I believe that the POSIX answer is:

	#include <unistd.h>

	char *getcwd(char *buf, size_t size);

You pass it a buffer <buf> of size <size> bytes, and getcwd() fills in
the buffer with the current working directory, and then returns <buf>.
If something fails (like <size> is too small) the function returns
NULL and sets errno.  I believe that PATH_MAX bytes should always be
big enough to hold the path.  Or maybe you need PATH_MAX+1 for the
null.  I can't remember.

Offhand, I don't recall if DJGPP supports this, but I'd bet it does.
(If not, please write a getcwd() and send it to the mailing list so it
gets into the next release of DJGPP.)

Unfortunately, I believe that this is one of those areas where every
UNIX system before POSIX did things slightly differently.
--
				Eric Backus
				ericb AT lsid DOT hp DOT com
				(206) 335-2495

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