Refrain from throwing fatal errors for

* .br .sp .nf .fi .na with arguments - just skip the arguments
* .TH lacking arguments - use empty strings instead like groff
* .TH with excessive arguments - skip those
Reminded by Joerg Sonnenberger, ok kristaps@.

3 files changed, 30 insertions, 40 deletions

diff --git a/usr.bin/mandoc/man_html.c b/usr.bin/mandoc/man_html.c
index e4ec6dcc6e0..046e22af34d 100644
--- a/usr.bin/mandoc/man_html.c
+++ b/usr.bin/mandoc/man_html.c
@@ -1,4 +1,4 @@
-/*	$Id: man_html.c,v 1.33 2011/01/16 19:41:16 schwarze Exp $ */
+/*	$Id: man_html.c,v 1.34 2011/01/17 00:15:19 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -96,7 +96,7 @@ static	const struct htmlman mans[MAN_MAX] = {
 	{ man_I_pre, NULL }, /* I */
 	{ man_alt_pre, NULL }, /* IR */
 	{ man_alt_pre, NULL }, /* RI */
-	{ NULL, NULL }, /* na */
+	{ man_ign_pre, NULL }, /* na */
 	{ man_br_pre, NULL }, /* sp */
 	{ man_literal_pre, NULL }, /* nf */
 	{ man_literal_pre, NULL }, /* fi */
@@ -649,7 +649,7 @@ man_literal_pre(MAN_ARGS)
 	} else
 		mh->fl &= ~MANH_LITERAL;
 
-	return(1);
+	return(0);
 }
 
 
diff --git a/usr.bin/mandoc/man_term.c b/usr.bin/mandoc/man_term.c
index fc319fcbcdc..700a3e17381 100644
--- a/usr.bin/mandoc/man_term.c
+++ b/usr.bin/mandoc/man_term.c
@@ -1,4 +1,4 @@
-/*	$Id: man_term.c,v 1.61 2011/01/16 03:46:21 schwarze Exp $ */
+/*	$Id: man_term.c,v 1.62 2011/01/17 00:15:19 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
@@ -122,7 +122,7 @@ static	const struct termact termacts[MAN_MAX] = {
 	{ pre_I, NULL, 0 }, /* I */
 	{ pre_alternate, NULL, 0 }, /* IR */
 	{ pre_alternate, NULL, 0 }, /* RI */
-	{ NULL, NULL, MAN_NOTEXT }, /* na */
+	{ pre_ign, NULL, MAN_NOTEXT }, /* na */
 	{ pre_sp, NULL, MAN_NOTEXT }, /* sp */
 	{ pre_literal, NULL, 0 }, /* nf */
 	{ pre_literal, NULL, 0 }, /* fi */
@@ -251,7 +251,7 @@ pre_literal(DECL_ARGS)
 	else
 		mt->fl &= ~MANT_LITERAL;
 
-	return(1);
+	return(0);
 }
 
 /* ARGSUSED */
diff --git a/usr.bin/mandoc/man_validate.c b/usr.bin/mandoc/man_validate.c
index 77db6986725..3c1e91f809f 100644
--- a/usr.bin/mandoc/man_validate.c
+++ b/usr.bin/mandoc/man_validate.c
@@ -1,4 +1,4 @@
-/*	$Id: man_validate.c,v 1.39 2011/01/16 19:27:25 schwarze Exp $ */
+/*	$Id: man_validate.c,v 1.40 2011/01/17 00:15:19 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
@@ -50,7 +50,6 @@ static	int	  check_part(CHKARGS);
 static	int	  check_root(CHKARGS);
 static	int	  check_sec(CHKARGS);
 static	int	  check_text(CHKARGS);
-static	int	  check_title(CHKARGS);
 
 static	int	  post_AT(CHKARGS);
 static	int	  post_fi(CHKARGS);
@@ -67,7 +66,7 @@ static	v_check	  posts_nf[] = { check_eq0, post_nf, NULL };
 static	v_check	  posts_par[] = { check_par, NULL };
 static	v_check	  posts_part[] = { check_part, NULL };
 static	v_check	  posts_sec[] = { check_sec, NULL };
-static	v_check	  posts_th[] = { check_ge2, check_le5, check_title, post_TH, NULL };
+static	v_check	  posts_th[] = { check_ge2, check_le5, post_TH, NULL };
 static	v_check	  posts_uc[] = { post_UC, NULL };
 static	v_check	  pres_bline[] = { check_bline, NULL };
 
@@ -197,29 +196,6 @@ check_root(CHKARGS)
 
 
 static int
-check_title(CHKARGS) 
-{
-	const char	*p;
-
-	assert(n->child);
-	/* FIXME: is this sufficient? */
-	if ('\0' == *n->child->string) {
-		man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
-		return(0);
-	}
-
-	for (p = n->child->string; '\0' != *p; p++)
-		/* Only warn about this once... */
-		if (isalpha((u_char)*p) && ! isupper((u_char)*p)) {
-			man_nmsg(m, n, MANDOCERR_UPPERCASE);
-			break;
-		}
-
-	return(1);
-}
-
-
-static int
 check_text(CHKARGS) 
 {
 	char		*p;
@@ -263,10 +239,10 @@ check_##name(CHKARGS) \
 { \
 	if (n->nchild ineq (x)) \
 		return(1); \
-	man_vmsg(m, MANDOCERR_SYNTARGCOUNT, n->line, n->pos, \
+	man_vmsg(m, MANDOCERR_ARGCOUNT, n->line, n->pos, \
 			"line arguments %s %d (have %d)", \
 			#ineq, (x), n->nchild); \
-	return(0); \
+	return(1); \
 }
 
 INEQ_DEFINE(0, ==, eq0)
@@ -393,6 +369,7 @@ check_bline(CHKARGS)
 static int
 post_TH(CHKARGS)
 {
+	const char	*p;
 
 	if (m->meta.title)
 		free(m->meta.title);
@@ -412,14 +389,26 @@ post_TH(CHKARGS)
 	/* ->TITLE<- MSEC DATE SOURCE VOL */
 
 	n = n->child;
-	assert(n);
-	m->meta.title = mandoc_strdup(n->string);
+	if (n && n->string) {
+		for (p = n->string; '\0' != *p; p++) {
+			/* Only warn about this once... */
+			if (isalpha((u_char)*p) && ! isupper((u_char)*p)) {
+				man_nmsg(m, n, MANDOCERR_UPPERCASE);
+				break;
+			}
+		}
+		m->meta.title = mandoc_strdup(n->string);
+	} else
+		m->meta.title = mandoc_strdup("");
 
 	/* TITLE ->MSEC<- DATE SOURCE VOL */
 
-	n = n->next;
-	assert(n);
-	m->meta.msec = mandoc_strdup(n->string);
+	if (n)
+		n = n->next;
+	if (n && n->string)
+		m->meta.msec = mandoc_strdup(n->string);
+	else
+		m->meta.msec = mandoc_strdup("");
 
 	/* TITLE MSEC ->DATE<- SOURCE VOL */
 
@@ -430,7 +419,8 @@ post_TH(CHKARGS)
 	 * string, then use the current date.
 	 */
 
-	n = n->next;
+	if (n)
+		n = n->next;
 	if (n && n->string && *n->string) {
 		m->meta.date = mandoc_a2time
 			(MTIME_ISO_8601, n->string);