If apropos(1) finds no match, print "nothing appropriate" to stderr

similar to what the old apropos did.
Requested by and OK deraadt@.

diff --git a/usr.bin/mandoc/main.c b/usr.bin/mandoc/main.c
index d5e561c..80d0fee 100644 (file)
--- a/usr.bin/mandoc/main.c
+++ b/usr.bin/mandoc/main.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: main.c,v 1.140 2015/04/18 16:34:03 schwarze Exp $ */
+/*     $OpenBSD: main.c,v 1.141 2015/04/19 15:10:04 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
@@ -336,6 +336,8 @@ main(int argc, char *argv[])
                            argc, argv, &res, &sz);
 
                if (sz == 0) {
+                       fprintf(stderr, "%s: nothing appropriate\n",
+                           progname);
                        rc = MANDOCLEVEL_BADARG;
                        goto out;
                }