started to implement a simple ifconfig

1 files changed, 46 insertions, 0 deletions

diff --git a/ifconfig.c b/ifconfig.c
new file mode 100644
index 0000000..2d3b8eb
--- /dev/null
+++ b/ifconfig.c
@@ -0,0 +1,46 @@
+/* See LICENSE file for copyright and license details. */
+#include <net/if.h>
+#include <stdio.h>
+
+#include "util.h"
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-a]\n", argv0);
+}
+
+static void
+print_interface(char *name)
+{
+	printf("%s\n", name);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int show_all = 0;
+	//~ struct ifreq ifr;
+	
+	ARGBEGIN {
+	case 'a':
+		show_all = 1;
+		break;
+	default:
+		usage();
+	} ARGEND
+	
+	if (show_all) {
+		struct if_nameindex *interfaces, *interface;
+		
+		interfaces = if_nameindex();
+		if (interfaces != NULL) {
+			for (interface = interfaces; (interface->if_index != 0 || interface->if_name != NULL); interface++) {
+				print_interface(interface->if_name);
+			}
+			if_freenameindex(interfaces);
+		}
+	}
+	
+	return 0;
+}