multicall: migrate execution options to common code

cmd/multicall-match-options.c

@@ -0,0 +1,57 @@
+/*
+ * cmd/multicall-match-options.c
+ * Purpose: multi-call binary frontend -- option handling
+ *
+ * Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * This software is provided 'as is' and without any warranty, express or
+ * implied.  In no event shall the authors be liable for any damages arising
+ * from the use of this software.
+ */
+
+#define _GNU_SOURCE
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include "cmd/multicall.h"
+
+struct match_options match_opts = {};
+
+static void handle_match(int short_opt, const struct if_option *opt, const char *opt_arg, const struct if_applet *applet)
+{
+	(void) opt;
+	(void) applet;
+
+	switch (short_opt)
+	{
+	case 'a':
+		match_opts.is_auto = true;
+		break;
+	case 'I':
+		match_opts.include_pattern = opt_arg;
+		break;
+	case 'X':
+		match_opts.exclude_pattern = opt_arg;
+		break;
+	default:
+		break;
+	}
+}
+
+static struct if_option match_options[] = {
+	{'a', "auto", NULL, "only match against interfaces hinted as 'auto'", false, handle_match},
+	{'I', "include", "include PATTERN", "only match against interfaces matching PATTERN", true, handle_match},
+	{'X', "exclude", "exclude PATTERN", "never match against interfaces matching PATTERN", true, handle_match},
+};
+
+struct if_option_group match_option_group = {
+	.desc = "Matching interfaces",
+	.group_size = ARRAY_SIZE(match_options),
+	.group = match_options
+};