[PATCH] Enable -f in ndp(8)

[Dimitris Papastamos]

Hi,

I noticed -f in ndp(8) did nothing at all so I've enabled it and
documented the file syntax in the man page.

===================================================================
RCS file: /cvs/src/usr.sbin/ndp/ndp.8,v
retrieving revision 1.33
diff -u -p -r1.33 ndp.8
--- ndp.8       3 Sep 2014 10:39:41 -0000       1.33
+++ ndp.8       13 Jul 2015 13:02:49 -0000
@@ -122,6 +122,12 @@ Delete the specified NDP entry.
 .It Fl f Ar filename
 Parse the file specified by
 .Ar filename .
+Entries in the file should be of the form:
+.Bd -ragged -offset indent -compact
+.Ar nodename etheraddr
+.Op Ar temp
+.Op Ar proxy
+.Ed
 .It Fl H
 Harmonize consistency between the routing table and the default router
 list; install the top entry of the list into the kernel routing table.
Index: ndp.c
===================================================================
RCS file: /cvs/src/usr.sbin/ndp/ndp.c,v
retrieving revision 1.61
diff -u -p -r1.61 ndp.c
--- ndp.c       3 Jun 2015 08:10:53 -0000       1.61
+++ ndp.c       13 Jul 2015 13:02:49 -0000
@@ -241,6 +241,8 @@ main(int argc, char *argv[])
                }
                delete(arg);
                break;
+       case 'f':
+               exit(file(arg) ? 1 : 0);
        case 'p':
                if (argc != 0) {
                        usage();