Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!labrea!csli!gandalf
From: gandalf@csli.STANFORD.EDU (Juergen Wagner)
Newsgroups: comp.unix.wizards
Subject: Re:  Writing to A NON-Existing File in \"C\"
Message-ID: <3381@csli.STANFORD.EDU>
Date: 8 Apr 88 00:17:50 GMT
References: <12860@brl-adm.ARPA>
Reply-To: gandalf@csli.stanford.edu (Juergen Wagner)
Organization: Center for the Study of Language and Information, Stanford U.
Lines: 34

Why all these lengthy solutions? As I tried to e-mail (host unreachable),
you could just do
	
# define do_output_p(file)	(!access((file),02))

and assign the result to a variable, say

static int do_output_flag;

main(...)
...
{
	char *file;
	...

	...
	do_output_flag = do_output_p(file);
	...
}

Then, to access the file use

# define Fopen      if (do_output_flag) fopen
# define Printf     if (do_output_flag) printf
# define Fclose     if (do_output_flag) fclose

Of course, another alternative would be just to open "/dev/null" instead of
the file specified.

Juergen "Gandalf" Wagner,		   gandalf@csli.stanford.edu
Center for the Study of Language and Information (CSLI), Stanford CA
-- 
Juergen "Gandalf" Wagner,		   gandalf@csli.stanford.edu
Center for the Study of Language and Information (CSLI), Stanford CA