1 files changed, 69 insertions, 0 deletions
diff --git a/bin/pax/getoldopt.c b/bin/pax/getoldopt.c
new file mode 100644
index 0000000..8ceb189
--- /dev/null
+++ b/bin/pax/getoldopt.c
@@ -0,0 +1,69 @@
+/*	$OpenBSD: getoldopt.c,v 1.9 2009/10/27 23:59:22 deraadt Exp $	*/
+/*	$NetBSD: getoldopt.c,v 1.3 1995/03/21 09:07:28 cgd Exp $	*/
+
+/*
+ * Plug-compatible replacement for getopt() for parsing tar-like
+ * arguments.  If the first argument begins with "-", it uses getopt;
+ * otherwise, it uses the old rules used by tar, dump, and ps.
+ *
+ * Written 25 August 1985 by John Gilmore (ihnp4!hoptoad!gnu) and placed
+ * in the Public Domain for your edification and enjoyment.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "pax.h"
+#include "extern.h"
+
+int
+getoldopt(int argc, char **argv, const char *optstring)
+{
+	static char	*key;		/* Points to next keyletter */
+	static char	use_getopt;	/* !=0 if argv[1][0] was '-' */
+	char		c;
+	char		*place;
+
+	optarg = NULL;
+
+	if (key == NULL) {		/* First time */
+		if (argc < 2)
+			return (-1);
+		key = argv[1];
+		if (*key == '-')
+			use_getopt++;
+		else
+			optind = 2;
+	}
+
+	if (use_getopt)
+		return (getopt(argc, argv, optstring));
+
+	c = *key++;
+	if (c == '\0') {
+		key--;
+		return (-1);
+	}
+	place = strchr(optstring, c);
+
+	if (place == NULL || c == ':') {
+		fprintf(stderr, "%s: unknown option %c\n", argv[0], c);
+		return ('?');
+	}
+
+	place++;
+	if (*place == ':') {
+		if (optind < argc) {
+			optarg = argv[optind];
+			optind++;
+		} else {
+			fprintf(stderr, "%s: %c argument missing\n",
+				argv[0], c);
+			return ('?');
+		}
+	}
+
+	return (c);
+}