1 /* vi: set sw=4 ts=4: */
3 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
10 static inline uint64_t hton64(uint64_t v)
12 return (((uint64_t)htonl(v)) << 32) | htonl(v >> 32);
17 #define ntoh64(v) hton64(v)
20 int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
21 int dumpleases_main(int argc UNUSED_PARAM, char **argv)
26 int64_t written_at, curr, expires_abs;
27 const char *file = LEASES_FILE;
28 struct dhcpOfferedAddr lease;
36 #if ENABLE_GETOPT_LONG
37 static const char dumpleases_longopts[] ALIGN1 =
38 "absolute\0" No_argument "a"
39 "remaining\0" No_argument "r"
40 "file\0" Required_argument "f"
43 applet_long_options = dumpleases_longopts;
45 opt_complementary = "=0:a--r:r--a";
46 opt = getopt32(argv, "arf:", &file);
48 fd = xopen(file, O_RDONLY);
50 printf("Mac Address IP-Address Expires %s\n", (opt & OPT_a) ? "at" : "in");
51 /* "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
53 if (full_read(fd, &written_at, sizeof(written_at)) != sizeof(written_at))
55 written_at = ntoh64(written_at);
57 if (curr < written_at)
58 written_at = curr; /* lease file from future! :) */
60 while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
61 const char *fmt = ":%02x" + 1;
62 for (i = 0; i < 6; i++) {
63 printf(fmt, lease.chaddr[i]);
66 addr.s_addr = lease.yiaddr;
67 printf(" %-15s ", inet_ntoa(addr));
68 expires_abs = ntohl(lease.expires) + written_at;
69 if (expires_abs <= curr) {
73 if (!(opt & OPT_a)) { /* no -a */
75 unsigned expires = expires_abs - curr;
76 d = expires / (24*60*60); expires %= (24*60*60);
77 h = expires / (60*60); expires %= (60*60);
78 m = expires / 60; expires %= 60;
80 printf("%u days ", d);
81 printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
83 time_t t = expires_abs;
84 fputs(ctime(&t), stdout);