source: MondoRescue/branches/stable/mindi-busybox/networking/udhcp/dumpleases.c@ 821

/* vi: set sw=4 ts=4: */
/*
 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 */
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include <getopt.h>
#include <time.h>

#include "dhcpd.h"
#include "leases.h"
#include "libbb_udhcp.h"

#define REMAINING 0
#define ABSOLUTE 1


#ifndef IN_BUSYBOX
static void ATTRIBUTE_NORETURN show_usage(void)
{
    printf(
"Usage: dumpleases -f <file> -[r|a]\n\n"
"  -f, --file=FILENAME             Leases file to load\n"
"  -r, --remaining                 Interepret lease times as time remaining\n"
"  -a, --absolute                  Interepret lease times as expire time\n");
    exit(0);
}
#else
#define show_usage bb_show_usage
#endif


#ifdef IN_BUSYBOX
int dumpleases_main(int argc, char *argv[])
#else
int main(int argc, char *argv[])
#endif
{
    FILE *fp;
    int i, c, mode = REMAINING;
    long expires;
    const char *file = LEASES_FILE;
    struct dhcpOfferedAddr lease;
    struct in_addr addr;

    static const struct option options[] = {
        {"absolute", 0, 0, 'a'},
        {"remaining", 0, 0, 'r'},
        {"file", 1, 0, 'f'},
        {0, 0, 0, 0}
    };

    while (1) {
        int option_index = 0;
        c = getopt_long(argc, argv, "arf:", options, &option_index);
        if (c == -1) break;

        switch (c) {
        case 'a': mode = ABSOLUTE; break;
        case 'r': mode = REMAINING; break;
        case 'f':
            file = optarg;
            break;
        default:
            show_usage();
        }
    }

    fp = xfopen(file, "r");

    printf("Mac Address       IP-Address      Expires %s\n", mode == REMAINING ? "in" : "at");
    /*     "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
    while (fread(&lease, sizeof(lease), 1, fp)) {

        for (i = 0; i < 6; i++) {
            printf("%02x", lease.chaddr[i]);
            if (i != 5) printf(":");
        }
        addr.s_addr = lease.yiaddr;
        printf(" %-15s", inet_ntoa(addr));
        expires = ntohl(lease.expires);
        printf(" ");
        if (mode == REMAINING) {
            if (!expires) printf("expired\n");
            else {
                if (expires > 60*60*24) {
                    printf("%ld days, ", expires / (60*60*24));
                    expires %= 60*60*24;
                }
                if (expires > 60*60) {
                    printf("%ld hours, ", expires / (60*60));
                    expires %= 60*60;
                }
                if (expires > 60) {
                    printf("%ld minutes, ", expires / 60);
                    expires %= 60;
                }
                printf("%ld seconds\n", expires);
            }
        } else printf("%s", ctime(&expires));
    }
    fclose(fp);

    return 0;
}