source: MondoRescue/branches/2.2.5/mindi-busybox/networking/udhcp/dumpleases.c@ 1765

/* vi: set sw=4 ts=4: */
/*
 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 */
#include <getopt.h>

#include "common.h"
#include "dhcpd.h"

int dumpleases_main(int argc, char **argv);
int dumpleases_main(int argc, 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;
}