Implement a simple, consistent user interface for error handling.

We now have sufficient practical experience to know what we want,
so this is intended to be final:
- provide -Wlevel (warning, error or fatal) to select what you care about
- provide -Wstop to stop after parsing a file with warnings you care about
- provide consistent exit status codes for those warnings you care about
- fully document what warnings, errors and fatal errors mean
- remove all other cruft from the user interface, less is more:
- remove all -f knobs along with the whole -f option
- remove the old -Werror because calling warnings "fatal" is silly
- always finish parsing each file, unless fatal errors prevent that
This commit also includes a couple of related simplifications behind
the scenes regarding error handling.
Feedback and OK  kristaps@;  Joerg Sonnenberger (NetBSD) and
Sascha Wildner (DragonFly BSD) agree with the general direction.

1 files changed, 3 insertions, 3 deletions

diff --git a/term.c b/term.c
index c0507cda..41c6c655 100644
--- a/term.c
+++ b/term.c
@@ -1,4 +1,4 @@
-/*	$Id: term.c,v 1.166 2010/07/26 22:26:05 kristaps Exp $ */
+/*	$Id: term.c,v 1.167 2010/08/20 01:02:07 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
@@ -83,7 +83,7 @@ term_alloc(enum termenc enc)
 	p = calloc(1, sizeof(struct termp));
 	if (NULL == p) {
 		perror(NULL);
-		exit(EXIT_FAILURE);
+		exit(MANDOCLEVEL_SYSERR);
 	}
 
 	p->enc = enc;
@@ -577,7 +577,7 @@ adjbuf(struct termp *p, size_t sz)
 	p->buf = realloc(p->buf, p->maxcols);
 	if (NULL == p->buf) {
 		perror(NULL);
-		exit(EXIT_FAILURE);
+		exit(MANDOCLEVEL_SYSERR);
 	}
 }