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https://github.com/sheumann/hush.git
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76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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#include <getopt.h>
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#include "common.h"
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#include "dhcpd.h"
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#define REMAINING 0
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#define ABSOLUTE 1
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int dumpleases_main(int argc, char *argv[]);
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int dumpleases_main(int argc, char *argv[])
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{
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int fp;
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int i, c, mode = REMAINING;
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unsigned long expires;
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const char *file = LEASES_FILE;
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struct dhcpOfferedAddr lease;
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struct in_addr addr;
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static const struct option options[] = {
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{"absolute", 0, 0, 'a'},
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{"remaining", 0, 0, 'r'},
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{"file", 1, 0, 'f'},
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{0, 0, 0, 0}
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};
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while (1) {
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int option_index = 0;
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c = getopt_long(argc, argv, "arf:", options, &option_index);
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if (c == -1) break;
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switch (c) {
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case 'a': mode = ABSOLUTE; break;
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case 'r': mode = REMAINING; break;
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case 'f':
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file = optarg;
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break;
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default:
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bb_show_usage();
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}
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}
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fp = xopen(file, O_RDONLY);
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printf("Mac Address IP-Address Expires %s\n", mode == REMAINING ? "in" : "at");
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/* "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
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while (full_read(fp, &lease, sizeof(lease)) == sizeof(lease)) {
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printf(":%02x"+1, lease.chaddr[0]);
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for (i = 1; i < 6; i++) {
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printf(":%02x", lease.chaddr[i]);
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}
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addr.s_addr = lease.yiaddr;
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printf(" %-15s ", inet_ntoa(addr));
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expires = ntohl(lease.expires);
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if (mode == REMAINING) {
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if (!expires)
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printf("expired\n");
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else {
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unsigned d, h, m;
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d = expires / (24*60*60); expires %= (24*60*60);
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h = expires / (60*60); expires %= (60*60);
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m = expires / 60; expires %= 60;
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if (d) printf("%u days ", d);
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printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
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}
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} else fputs(ctime(&expires), stdout);
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}
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/* close(fp); */
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return 0;
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}
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