/*
* Mini nslookup implementation for busybox
*
- *
- * Copyright (C) 2000 by Lineo, inc.
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
* Written by John Beppu <beppu@lineo.com>
*
* This program is free software; you can redistribute it and/or modify
*
*/
-#include "internal.h"
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
+#include <stdlib.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
+#include "busybox.h"
/*
| I'm only implementing non-interactive mode;
| + find out how the real nslookup gets the default name server
*/
-static const char nslookup_usage[] = "nslookup [HOST]\n\n";
-
-
/* I have to see how the real nslookup does this.
* I could dig through /etc/resolv.conf, but is there a
* better (programatic) way?
*/
-static void server_fprint(FILE * dst)
+static inline void server_print(void)
{
- fprintf(dst, "Server: %s\n", "something");
- fprintf(dst, "Address: %s\n\n", "something");
+ printf("Server: %s\n", "default");
+ printf("Address: %s\n\n", "default");
}
/* only works for IPv4 */
-static int addr_fprint(char *addr, FILE * dst)
+static int addr_fprint(char *addr)
{
- uint8_t split[4];
- uint32_t ip;
- uint32_t *x = (uint32_t *) addr;
+ u_int8_t split[4];
+ u_int32_t ip;
+ u_int32_t *x = (u_int32_t *) addr;
ip = ntohl(*x);
split[0] = (ip & 0xff000000) >> 24;
split[1] = (ip & 0x00ff0000) >> 16;
split[2] = (ip & 0x0000ff00) >> 8;
split[3] = (ip & 0x000000ff);
- fprintf(dst, "%d.%d.%d.%d", split[0], split[1], split[2], split[3]
- );
+ printf("%d.%d.%d.%d", split[0], split[1], split[2], split[3]);
return 0;
}
/* changes a c-string matching the perl regex \d+\.\d+\.\d+\.\d+
- * into a uint32_t
+ * into a u_int32_t
*/
-static uint32_t str_to_addr(const char *addr)
+static u_int32_t str_to_addr(const char *addr)
{
- uint32_t split[4];
- uint32_t ip;
+ u_int32_t split[4];
+ u_int32_t ip;
sscanf(addr, "%d.%d.%d.%d",
&split[0], &split[1], &split[2], &split[3]);
/* takes the NULL-terminated array h_addr_list, and
* prints its contents appropriately
*/
-static int addr_list_fprint(char **h_addr_list, FILE * dst)
+static int addr_list_fprint(char **h_addr_list)
{
int i, j;
char *addr_string = (h_addr_list[1])
- ? "Addresses" : "Address";
+ ? "Addresses: " : "Address: ";
- fprintf(dst, "%s: ", addr_string);
+ printf("%s ", addr_string);
for (i = 0, j = 0; h_addr_list[i]; i++, j++) {
- addr_fprint(h_addr_list[i], dst);
+ addr_fprint(h_addr_list[i]);
/* real nslookup does this */
if (j == 4) {
if (h_addr_list[i + 1]) {
- fprintf(dst, "\n ");
+ printf("\n ");
}
j = 0;
} else {
if (h_addr_list[i + 1]) {
- fprintf(dst, ", ");
+ printf(", ");
}
}
}
- fprintf(dst, "\n");
+ printf("\n");
return 0;
}
}
/* print the results as nslookup would */
-static struct hostent *hostent_fprint(struct hostent *host, FILE * dst)
+static struct hostent *hostent_fprint(struct hostent *host)
{
if (host) {
- fprintf(dst, "Name: %s\n", host->h_name);
- addr_list_fprint(host->h_addr_list, dst);
+ printf("Name: %s\n", host->h_name);
+ addr_list_fprint(host->h_addr_list);
} else {
- fprintf(dst, "*** %s\n", hstrerror(h_errno));
+ printf("*** Unknown host\n");
}
return host;
}
{
struct hostent *host;
- if (argc < 2) {
- usage(nslookup_usage);
+ if (argc < 2 || *argv[1]=='-') {
+ show_usage();
}
- server_fprint(stdout);
+ server_print();
if (is_ip_address(argv[1])) {
host = gethostbyaddr_wrapper(argv[1]);
} else {
host = gethostbyname(argv[1]);
}
- hostent_fprint(host, stdout);
- return 0;
+ hostent_fprint(host);
+ return EXIT_SUCCESS;
}
-/* $Id: nslookup.c,v 1.4 2000/02/08 19:58:47 erik Exp $ */
+/* $Id: nslookup.c,v 1.22 2001/02/20 06:14:08 andersen Exp $ */