[cmdline] Add standalone "nslookup" command

Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/hci/commands/nslookup_cmd.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2012 Patrick Plenefisch <phplenefisch@wpi.edu>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdio.h>
+#include <getopt.h>
+#include <ipxe/command.h>
+#include <ipxe/parseopt.h>
+#include <usr/nslookup.h>
+
+/** @file
+ *
+ * nslookup command
+ *
+ */
+
+/** "nslookup" options */
+struct nslookup_options {};
+
+/** "nslookup" option list */
+static struct option_descriptor nslookup_opts[] = {};
+
+/** "nslookup" command descriptor */
+static struct command_descriptor nslookup_cmd =
+	COMMAND_DESC ( struct nslookup_options, nslookup_opts, 2, 2,
+		       "<setting> <name>" );
+
+/**
+ * The "nslookup" command
+ *
+ * @v argc		Argument count
+ * @v argv		Argument list
+ * @ret rc		Return status code
+ */
+static int nslookup_exec ( int argc, char **argv ) {
+	struct nslookup_options opts;
+	const char *name;
+	const char *setting_name;
+	int rc;
+
+	/* Parse options */
+	if ( ( rc = parse_options ( argc, argv, &nslookup_cmd, &opts ) ) != 0 )
+		return rc;
+
+	/* Parse setting name */
+	setting_name = argv[optind];
+
+	/* Parse name to be resolved */
+	name = argv[ optind + 1 ];
+
+	/* Look up name */
+	if ( ( rc = nslookup ( name, setting_name ) ) != 0 )
+		return rc;
+
+	return 0;
+}
+
+/** The "nslookup" command */
+struct command nslookup_command __command = {
+	.name = "nslookup",
+	.exec = nslookup_exec,
+};