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    Contents of /trunk/mkinitrd-magellan/busybox/networking/udhcp/dumpleases.c

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    Revision 984 - (show annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months 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 }