Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!mailrus!tut.cis.ohio-state.edu!mandrill!hal!ncoast!allbery
From: allbery@ncoast.UUCP (Brandon S. Allbery)
Newsgroups: comp.sources.d
Subject: Re: newgetty question
Message-ID: <8003@ncoast.UUCP>
Date: 15 Jun 88 21:31:45 GMT
References: <1259@percival.UUCP>
Reply-To: allbery@ncoast.UUCP (Brandon S. Allbery)
Followup-To: comp.sources.d
Organization: Cleveland Public Access UN*X, Cleveland, Oh
Lines: 37

As quoted from <1259@percival.UUCP> by nerd@percival.UUCP (Michael Galassi):
+---------------
| 	I just finished trying to compile the newgetty program recently
| posted.  I got _rdchk, _defread and _defopen as undefined by ld.  I
+---------------

rdchk() works on a Unix fd, not a stdio (FILE *).

The "newgetty" posting was specific to Tandy Xenix 3.2, and will need some
work to be ported elsewhere.  Be warned that it may not function correctly
on your system, depending on what BSD expects of a getty vs. what Tandy
Xenix expects.

defopen() and defread() comprise a simple global environment.  defopen()
opens the named file (Xenix convention is that defopen() files live in the
/etc/default directory) and saves the file descriptor for defread().  Any
open defopen() file is closed before the new file is opened.  defread()
looks for lines beginning with the string passed to it and returns a pointer
to the rest of the line.

An example (mirroring an actual use, although this better not be the actual
code!) follows:

/etc/default/mail:
SPOOLONLY=yes

mail.c:
	...
	defopen("/etc/default/mail");
	if ((cp = defread("SPOOLONLY=")) == (char *) 0 || strcmp(cp, "yes"))
		execl("/usr/lib/uucp/uucico", "UUCICO", "-r1", (char *) 0);

++Brandon
-- 
Brandon S. Allbery			  | "Given its constituency, the only
uunet!marque,sun!mandrill}!ncoast!allbery | thing I expect to be "open" about
Delphi: ALLBERY	       MCI Mail: BALLBERY | [the Open Software Foundation] is
comp.sources.misc: ncoast!sources-misc    | its mouth."  --John Gilmore