mdocml: Ignore invalid directories in man.conf(5) and MANPATH, even if

[schwarze@mdocml.bsd.lv]

Log Message:
-----------
Ignore invalid directories in man.conf(5) and MANPATH, even if their
parent directories exist, but complain about invalid directories
given on the command line.
Intended to fix an oddity reported by sthen@.

Modified Files:
--------------
    mdocml:
        manpath.c

Revision Data
-------------
Index: manpath.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/manpath.c,v
retrieving revision 1.17
retrieving revision 1.18
diff -Lmanpath.c -Lmanpath.c -u -p -r1.17 -r1.18
--- manpath.c
+++ manpath.c
@@ -1,6 +1,6 @@
 /*	$Id$ */
 /*
- * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2011, 2014 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -18,6 +18,7 @@
 #include "config.h"
 
 #include <sys/types.h>
+#include <sys/stat.h>
 
 #include <assert.h>
 #include <ctype.h>
@@ -32,8 +33,8 @@
 #define MAN_CONF_FILE	"/etc/man.conf"
 #define MAN_CONF_KEY	"_whatdb"
 
-static	void	 manpath_add(struct manpaths *, const char *);
-static	void	 manpath_parseline(struct manpaths *, char *);
+static	void	 manpath_add(struct manpaths *, const char *, int);
+static	void	 manpath_parseline(struct manpaths *, char *, int);
 
 void
 manpath_parse(struct manpaths *dirs, const char *file,
@@ -88,11 +89,11 @@ manpath_parse(struct manpaths *dirs, con
 	char		*insert;
 
 	/* Always prepend -m. */
-	manpath_parseline(dirs, auxp);
+	manpath_parseline(dirs, auxp, 1);
 
 	/* If -M is given, it overrides everything else. */
 	if (NULL != defp) {
-		manpath_parseline(dirs, defp);
+		manpath_parseline(dirs, defp, 1);
 		return;
 	}
 
@@ -110,13 +111,13 @@ manpath_parse(struct manpaths *dirs, con
 	/* Prepend man.conf(5) to MANPATH. */
 	if (':' == defp[0]) {
 		manpath_manconf(dirs, file);
-		manpath_parseline(dirs, defp);
+		manpath_parseline(dirs, defp, 0);
 		return;
 	}
 
 	/* Append man.conf(5) to MANPATH. */
 	if (':' == defp[strlen(defp) - 1]) {
-		manpath_parseline(dirs, defp);
+		manpath_parseline(dirs, defp, 0);
 		manpath_manconf(dirs, file);
 		return;
 	}
@@ -125,14 +126,14 @@ manpath_parse(struct manpaths *dirs, con
 	insert = strstr(defp, "::");
 	if (NULL != insert) {
 		*insert++ = '\0';
-		manpath_parseline(dirs, defp);
+		manpath_parseline(dirs, defp, 0);
 		manpath_manconf(dirs, file);
-		manpath_parseline(dirs, insert + 1);
+		manpath_parseline(dirs, insert + 1, 0);
 		return;
 	}
 
 	/* MANPATH overrides man.conf(5) completely. */
-	manpath_parseline(dirs, defp);
+	manpath_parseline(dirs, defp, 0);
 #endif
 }
 
@@ -140,7 +141,7 @@ manpath_parse(struct manpaths *dirs, con
  * Parse a FULL pathname from a colon-separated list of arrays.
  */
 static void
-manpath_parseline(struct manpaths *dirs, char *path)
+manpath_parseline(struct manpaths *dirs, char *path, int complain)
 {
 	char	*dir;
 
@@ -148,7 +149,7 @@ manpath_parseline(struct manpaths *dirs,
 		return;
 
 	for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
-		manpath_add(dirs, dir);
+		manpath_add(dirs, dir, complain);
 }
 
 /*
@@ -156,19 +157,33 @@ manpath_parseline(struct manpaths *dirs,
  * Grow the array one-by-one for simplicity's sake.
  */
 static void
-manpath_add(struct manpaths *dirs, const char *dir)
+manpath_add(struct manpaths *dirs, const char *dir, int complain)
 {
 	char		 buf[PATH_MAX];
+	struct stat	 sb;
 	char		*cp;
 	size_t		 i;
 
-	if (NULL == (cp = realpath(dir, buf)))
+	if (NULL == (cp = realpath(dir, buf))) {
+		if (complain) {
+			fputs("manpath: ", stderr);
+			perror(dir);
+		}
 		return;
+	}
 
 	for (i = 0; i < dirs->sz; i++)
 		if (0 == strcmp(dirs->paths[i], dir))
 			return;
 
+	if (stat(cp, &sb) == -1) {
+		if (complain) {
+			fputs("manpath: ", stderr);
+			perror(dir);
+		}
+		return;
+	}
+
 	dirs->paths = mandoc_reallocarray(dirs->paths,
 	    dirs->sz + 1, sizeof(char *));
 
@@ -215,7 +230,7 @@ manpath_manconf(struct manpaths *dirs, c
 		if (NULL == (q = strrchr(p, '/')))
 			continue;
 		*q = '\0';
-		manpath_add(dirs, p);
+		manpath_add(dirs, p, 0);
 	}
 
 	fclose(stream);
--
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