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

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    Revision 984 - (hide annotations) (download)
    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 niro 532 /* 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 niro 984 #include "unicode.h"
    9 niro 532
    10 niro 984 #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 niro 816 int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    22     int dumpleases_main(int argc UNUSED_PARAM, char **argv)
    23 niro 532 {
    24 niro 816 int fd;
    25     int i;
    26     unsigned opt;
    27 niro 984 int64_t written_at, curr, expires_abs;
    28 niro 532 const char *file = LEASES_FILE;
    29 niro 984 struct dyn_lease lease;
    30 niro 532 struct in_addr addr;
    31    
    32 niro 816 enum {
    33     OPT_a = 0x1, // -a
    34     OPT_r = 0x2, // -r
    35     OPT_f = 0x4, // -f
    36 niro 532 };
    37 niro 984 #if ENABLE_LONG_OPTS
    38 niro 816 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 niro 532
    44 niro 816 applet_long_options = dumpleases_longopts;
    45     #endif
    46 niro 984 init_unicode();
    47    
    48 niro 816 opt_complementary = "=0:a--r:r--a";
    49     opt = getopt32(argv, "arf:", &file);
    50 niro 532
    51 niro 816 fd = xopen(file, O_RDONLY);
    52 niro 532
    53 niro 984 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 niro 816 while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
    65 niro 984 const char *fmt = ":%02x" + 1;
    66     for (i = 0; i < 6; i++) {
    67     printf(fmt, lease.lease_mac[i]);
    68     fmt = ":%02x";
    69 niro 532 }
    70 niro 984 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 niro 816 if (!(opt & OPT_a)) { /* no -a */
    85 niro 984 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 niro 532 }
    98 niro 816 /* close(fd); */
    99 niro 532
    100     return 0;
    101     }