rt_names: stop allocating 5k in rwdata

[oweals/busybox.git] / networking / udhcp / dumpleases.c

diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
index 2b19d976829353a1c95714d5c692794ca84f7f60..a0e81bb1306038bed003dfc85f9c93acfe8ffad2 100644 (file)
--- a/networking/udhcp/dumpleases.c
+++ b/networking/udhcp/dumpleases.c
@@ -1,112 +1,74 @@
-#include <fcntl.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <signal.h>
-#include <errno.h>
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
 #include <getopt.h>
-#include <time.h>
 
-#include "libbb_udhcp.h"
+#include "common.h"
+#include "dhcpd.h"
+
 
 #define REMAINING 0
 #define ABSOLUTE 1
 
-struct lease_t {
-       unsigned char chaddr[16];
-       u_int32_t yiaddr;
-       u_int32_t expires;
-};
-
-#ifdef BB_VER
 int dumpleases_main(int argc, char *argv[])
-#else
-int main(int argc, char *argv[])
-#endif
 {
-       FILE *fp;
+       int fp;
        int i, c, mode = REMAINING;
-       long expires;
-       char file[255] = "/var/lib/misc/udhcpd.leases";
-       struct lease_t lease;
+       unsigned long expires;
+       const char *file = LEASES_FILE;
+       struct dhcpOfferedAddr lease;
        struct in_addr addr;
-       
-       static struct option options[] = {
+
+       static const struct option options[] = {
                {"absolute", 0, 0, 'a'},
                {"remaining", 0, 0, 'r'},
                {"file", 1, 0, 'f'},
-               {"help", 0, 0, 'h'},
                {0, 0, 0, 0}
        };
 
        while (1) {
                int option_index = 0;
-               c = getopt_long(argc, argv, "arf:h", options, &option_index);
+               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':
-                       strncpy(file, optarg, 255);
-                       file[254] = '\0';
-                       break;
-               case 'h':
-                       printf("Usage: dumpleases -f <file> -[r|a]\n\n");
-                       printf("  -f, --file=FILENAME             Leases file to load\n");
-                       printf("  -r, --remaining                 Interepret lease times as time remaing\n");
-                       printf("  -a, --absolute                  Interepret lease times as expire time\n");
+                       file = optarg;
                        break;
+               default:
+                       bb_show_usage();
                }
        }
-                       
-       if (!(fp = fopen(file, "r"))) {
-               perror("could not open input file");
-               return 0;
-       }
 
-       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)) {
+       fp = xopen(file, O_RDONLY);
 
-               for (i = 0; i < 6; i++) {
-                       printf("%02x", lease.chaddr[i]);
-                       if (i != 5) printf(":");
+       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 (full_read(fp, &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));
+               printf(" %-15s ", inet_ntoa(addr));
                expires = ntohl(lease.expires);
-               printf(" ");
                if (mode == REMAINING) {
-                       if (!expires) printf("expired\n");
+                       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);
+                               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 printf("%s", ctime(&expires));
+               } else fputs(ctime(&expires), stdout);
        }
-       fclose(fp);
-       
+       /* close(fp); */
+
        return 0;
 }