Contents of /trunk/mkinitrd-magellan/busybox/networking/udhcp/dumpleases.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
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File size: 2711 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
File MIME type: text/plain
File size: 2711 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
4 | */ |
5 | |
6 | #include "common.h" |
7 | #include "dhcpd.h" |
8 | #include "unicode.h" |
9 | |
10 | #if BB_LITTLE_ENDIAN |
11 | static inline uint64_t hton64(uint64_t v) |
12 | { |
13 | return (((uint64_t)htonl(v)) << 32) | htonl(v >> 32); |
14 | } |
15 | #else |
16 | #define hton64(v) (v) |
17 | #endif |
18 | #define ntoh64(v) hton64(v) |
19 | |
20 | |
21 | int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
22 | int dumpleases_main(int argc UNUSED_PARAM, char **argv) |
23 | { |
24 | int fd; |
25 | int i; |
26 | unsigned opt; |
27 | int64_t written_at, curr, expires_abs; |
28 | const char *file = LEASES_FILE; |
29 | struct dyn_lease lease; |
30 | struct in_addr addr; |
31 | |
32 | enum { |
33 | OPT_a = 0x1, // -a |
34 | OPT_r = 0x2, // -r |
35 | OPT_f = 0x4, // -f |
36 | }; |
37 | #if ENABLE_LONG_OPTS |
38 | static const char dumpleases_longopts[] ALIGN1 = |
39 | "absolute\0" No_argument "a" |
40 | "remaining\0" No_argument "r" |
41 | "file\0" Required_argument "f" |
42 | ; |
43 | |
44 | applet_long_options = dumpleases_longopts; |
45 | #endif |
46 | init_unicode(); |
47 | |
48 | opt_complementary = "=0:a--r:r--a"; |
49 | opt = getopt32(argv, "arf:", &file); |
50 | |
51 | fd = xopen(file, O_RDONLY); |
52 | |
53 | printf("Mac Address IP Address Host Name Expires %s\n", (opt & OPT_a) ? "at" : "in"); |
54 | /* "00:00:00:00:00:00 255.255.255.255 ABCDEFGHIJKLMNOPQRS Wed Jun 30 21:49:08 1993" */ |
55 | /* "123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 */ |
56 | |
57 | if (full_read(fd, &written_at, sizeof(written_at)) != sizeof(written_at)) |
58 | return 0; |
59 | written_at = ntoh64(written_at); |
60 | curr = time(NULL); |
61 | if (curr < written_at) |
62 | written_at = curr; /* lease file from future! :) */ |
63 | |
64 | while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) { |
65 | const char *fmt = ":%02x" + 1; |
66 | for (i = 0; i < 6; i++) { |
67 | printf(fmt, lease.lease_mac[i]); |
68 | fmt = ":%02x"; |
69 | } |
70 | addr.s_addr = lease.lease_nip; |
71 | /* actually, 15+1 and 19+1, +1 is a space between columns */ |
72 | /* lease.hostname is char[20] and is always NUL terminated */ |
73 | #if ENABLE_FEATURE_ASSUME_UNICODE |
74 | printf(" %-16s%s%*s", inet_ntoa(addr), lease.hostname, |
75 | 20 - (int)unicode_strlen(lease.hostname), ""); |
76 | #else |
77 | printf(" %-16s%-20s", inet_ntoa(addr), lease.hostname); |
78 | #endif |
79 | expires_abs = ntohl(lease.expires) + written_at; |
80 | if (expires_abs <= curr) { |
81 | puts("expired"); |
82 | continue; |
83 | } |
84 | if (!(opt & OPT_a)) { /* no -a */ |
85 | unsigned d, h, m; |
86 | unsigned expires = expires_abs - curr; |
87 | d = expires / (24*60*60); expires %= (24*60*60); |
88 | h = expires / (60*60); expires %= (60*60); |
89 | m = expires / 60; expires %= 60; |
90 | if (d) |
91 | printf("%u days ", d); |
92 | printf("%02u:%02u:%02u\n", h, m, (unsigned)expires); |
93 | } else { /* -a */ |
94 | time_t t = expires_abs; |
95 | fputs(ctime(&t), stdout); |
96 | } |
97 | } |
98 | /* close(fd); */ |
99 | |
100 | return 0; |
101 | } |