mdocml: In update mode, when opening the database fails, probably

mdocml: In update mode, when opening the database fails, probably

[schwarze]

Log Message:
-----------
In update mode, when opening the database fails, probably because it is
missing or corrupt, just rebuild it from scratch.  This also helps when
installing the very first port on a freshly installed machine 
and is similar to what espie@'s classical makewhatis(8) did.

Issue reported by naddy@ via kili@.

Modified Files:
--------------
    mdocml:
        mandocdb.c

Revision Data
-------------
Index: mandocdb.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mandocdb.c,v
retrieving revision 1.137
retrieving revision 1.138
diff -Lmandocdb.c -Lmandocdb.c -u -p -r1.137 -r1.138
--- mandocdb.c
+++ mandocdb.c
@@ -442,15 +442,25 @@ main(int argc, char *argv[])
 		 */
 		if (0 == set_basedir(path_arg))
 			goto out;
-		for (i = 0; i < argc; i++)
-			filescan(argv[i]);
-		if (0 == dbopen(1))
-			goto out;
-		if (OP_TEST != op)
-			dbprune();
+		if (dbopen(1)) {
+			for (i = 0; i < argc; i++)
+				filescan(argv[i]);
+			if (OP_TEST != op)
+				dbprune();
+		} else {
+			/*
+			 * Database missing or corrupt.
+			 * Recreate from scratch.
+			 */
+			op = OP_DEFAULT;
+			if (0 == treescan())
+				goto out;
+			if (0 == dbopen(0))
+				goto out;
+		}
 		if (OP_DELETE != op)
 			mpages_merge(mc, mp);
-		dbclose(1);
+		dbclose(OP_DEFAULT == op ? 0 : 1);
 	} else {
 		/*
 		 * If we have arguments, use them as our manpaths.
--
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