1 files changed, 66 insertions, 0 deletions
diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
new file mode 100644
index 0000000..3e19390
--- /dev/null
+++ b/networking/udhcp/dumpleases.c
@@ -0,0 +1,66 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+
+#include "common.h"
+#include "dhcpd.h"
+
+int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dumpleases_main(int argc UNUSED_PARAM, char **argv)
+{
+	int fd;
+	int i;
+	unsigned opt;
+	time_t expires;
+	const char *file = LEASES_FILE;
+	struct dhcpOfferedAddr lease;
+	struct in_addr addr;
+
+	enum {
+		OPT_a	= 0x1,	// -a
+		OPT_r	= 0x2,	// -r
+		OPT_f	= 0x4,	// -f
+	};
+#if ENABLE_GETOPT_LONG
+	static const char dumpleases_longopts[] ALIGN1 =
+		"absolute\0"  No_argument       "a"
+		"remaining\0" No_argument       "r"
+		"file\0"      Required_argument "f"
+		;
+
+	applet_long_options = dumpleases_longopts;
+#endif
+	opt_complementary = "=0:a--r:r--a";
+	opt = getopt32(argv, "arf:", &file);
+
+	fd = xopen(file, O_RDONLY);
+
+	printf("Mac Address       IP-Address      Expires %s\n", (opt & OPT_a) ? "at" : "in");
+	/*     "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
+	while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
+		printf(":%02x"+1, lease.chaddr[0]);
+		for (i = 1; i < 6; i++) {
+			printf(":%02x", lease.chaddr[i]);
+		}
+		addr.s_addr = lease.yiaddr;
+		printf(" %-15s ", inet_ntoa(addr));
+		expires = ntohl(lease.expires);
+		if (!(opt & OPT_a)) { /* no -a */
+			if (!expires)
+				puts("expired");
+			else {
+				unsigned d, h, m;
+				d = expires / (24*60*60); expires %= (24*60*60);
+				h = expires / (60*60); expires %= (60*60);
+				m = expires / 60; expires %= 60;
+				if (d) printf("%u days ", d);
+				printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
+			}
+		} else /* -a */
+			fputs(ctime(&expires), stdout);
+	}
+	/* close(fd); */
+
+	return 0;
+}