warn about invalid output options

and error out if they occur on the command line;
missing feature found in the TODO file

3 files changed, 80 insertions, 35 deletions

diff --git a/usr.bin/mandoc/main.c b/usr.bin/mandoc/main.c
index a5eacd713e9..b0a3a6d756a 100644
--- a/usr.bin/mandoc/main.c
+++ b/usr.bin/mandoc/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.182 2017/01/09 17:49:55 schwarze Exp $ */
+/*	$OpenBSD: main.c,v 1.183 2017/01/27 13:47:17 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2012, 2014-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -117,6 +117,7 @@ main(int argc, char *argv[])
 	struct manpage	*res, *resp;
 	char		*conf_file, *defpaths;
 	const char	*sec;
+	const char	*thisarg;
 	size_t		 i, sz;
 	int		 prio, best_prio;
 	enum outmode	 outmode;
@@ -223,9 +224,14 @@ main(int argc, char *argv[])
 			break;
 		case 'O':
 			search.outkey = optarg;
-			while (optarg != NULL)
-				manconf_output(&conf.output,
-				    strsep(&optarg, ","));
+			while (optarg != NULL) {
+				thisarg = optarg;
+				if (manconf_output(&conf.output,
+				    strsep(&optarg, ","), 0) == 0)
+					continue;
+				warnx("-O %s: Bad argument", thisarg);
+				return (int)MANDOCLEVEL_BADARG;
+			}
 			break;
 		case 'S':
 			search.arch = optarg;
diff --git a/usr.bin/mandoc/manconf.h b/usr.bin/mandoc/manconf.h
index 8cdb071a691..64f04b3b55d 100644
--- a/usr.bin/mandoc/manconf.h
+++ b/usr.bin/mandoc/manconf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: manconf.h,v 1.2 2015/11/07 13:57:55 schwarze Exp $	*/
+/*	$OpenBSD: manconf.h,v 1.3 2017/01/27 13:47:17 schwarze Exp $	*/
 /*
  * Copyright (c) 2011, 2015 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
@@ -44,5 +44,5 @@ struct	manconf {
 
 
 void	 manconf_parse(struct manconf *, const char *, char *, char *);
-void	 manconf_output(struct manoutput *, const char *);
+int	 manconf_output(struct manoutput *, const char *, int);
 void	 manconf_free(struct manconf *);
diff --git a/usr.bin/mandoc/manpath.c b/usr.bin/mandoc/manpath.c
index 908bdd06b49..718f8d945b9 100644
--- a/usr.bin/mandoc/manpath.c
+++ b/usr.bin/mandoc/manpath.c
@@ -1,6 +1,6 @@
-/*	$OpenBSD: manpath.c,v 1.18 2016/05/23 18:59:00 millert Exp $	*/
+/*	$OpenBSD: manpath.c,v 1.19 2017/01/27 13:47:17 schwarze Exp $	*/
 /*
- * Copyright (c) 2011, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -206,7 +206,7 @@ manconf_file(struct manconf *conf, const char *file)
 			*manpath_default = '\0';
 			break;
 		case 1:  /* output */
-			manconf_output(&conf->output, cp);
+			manconf_output(&conf->output, cp, 1);
 			break;
 		default:
 			break;
@@ -220,15 +220,17 @@ out:
 		manpath_parseline(&conf->manpath, manpath_default, 0);
 }
 
-void
-manconf_output(struct manoutput *conf, const char *cp)
+int
+manconf_output(struct manoutput *conf, const char *cp, int fromfile)
 {
 	const char *const toks[] = {
 	    "includes", "man", "paper", "style",
 	    "indent", "width", "fragment", "mdoc"
 	};
 
-	size_t	 len, tok;
+	const char	*errstr;
+	char		*oldval;
+	size_t		 len, tok;
 
 	for (tok = 0; tok < sizeof(toks)/sizeof(toks[0]); tok++) {
 		len = strlen(toks[tok]);
@@ -243,41 +245,78 @@ manconf_output(struct manoutput *conf, const char *cp)
 		}
 	}
 
-	if (tok < 6 && *cp == '\0')
-		return;
+	if (tok < 6 && *cp == '\0') {
+		warnx("-O %s=?: Missing argument value", toks[tok]);
+		return -1;
+	}
+	if ((tok == 6 || tok == 7) && *cp != '\0') {
+		warnx("-O %s: Does not take a value: %s", toks[tok], cp);
+		return -1;
+	}
 
 	switch (tok) {
 	case 0:
-		if (conf->includes == NULL)
-			conf->includes = mandoc_strdup(cp);
-		break;
+		if (conf->includes != NULL) {
+			oldval = mandoc_strdup(conf->includes);
+			break;
+		}
+		conf->includes = mandoc_strdup(cp);
+		return 0;
 	case 1:
-		if (conf->man == NULL)
-			conf->man = mandoc_strdup(cp);
-		break;
+		if (conf->man != NULL) {
+			oldval = mandoc_strdup(conf->man);
+			break;
+		}
+		conf->man = mandoc_strdup(cp);
+		return 0;
 	case 2:
-		if (conf->paper == NULL)
-			conf->paper = mandoc_strdup(cp);
-		break;
+		if (conf->paper != NULL) {
+			oldval = mandoc_strdup(conf->paper);
+			break;
+		}
+		conf->paper = mandoc_strdup(cp);
+		return 0;
 	case 3:
-		if (conf->style == NULL)
-			conf->style = mandoc_strdup(cp);
-		break;
+		if (conf->style != NULL) {
+			oldval = mandoc_strdup(conf->style);
+			break;
+		}
+		conf->style = mandoc_strdup(cp);
+		return 0;
 	case 4:
-		if (conf->indent == 0)
-			conf->indent = strtonum(cp, 0, 1000, NULL);
-		break;
+		if (conf->indent) {
+			mandoc_asprintf(&oldval, "%zu", conf->indent);
+			break;
+		}
+		conf->indent = strtonum(cp, 0, 1000, &errstr);
+		if (errstr == NULL)
+			return 0;
+		warnx("-O indent=%s is %s", cp, errstr);
+		return -1;
 	case 5:
-		if (conf->width == 0)
-			conf->width = strtonum(cp, 58, 1000, NULL);
-		break;
+		if (conf->width) {
+			mandoc_asprintf(&oldval, "%zu", conf->width);
+			break;
+		}
+		conf->width = strtonum(cp, 58, 1000, &errstr);
+		if (errstr == NULL)
+			return 0;
+		warnx("-O width=%s is %s", cp, errstr);
+		return -1;
 	case 6:
 		conf->fragment = 1;
-		break;
+		return 0;
 	case 7:
 		conf->mdoc = 1;
-		break;
+		return 0;
 	default:
-		break;
+		if (fromfile)
+			warnx("-O %s: Bad argument", cp);
+		return -1;
 	}
+	if (fromfile == 0)
+		warnx("-O %s=%s: Option already set to %s",
+		    toks[tok], cp, oldval);
+	free(oldval);
+	return -1;
 }