SUMMARY: C program....

  Tank's everybody.....


  i compile with

  gcc p.c -o p -lsocket.....

  :-)


On Wed, 13 Jun 2001, Mario Henley Becerril Geldis wrote:

> 
> 
> 
>  I have next code:
> 
> 
>  #include <stdio.h>
> #include <sys/types.h>
> #include <netdb.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> 
> main (argc, argv)
> int argc;
> char *argv;
> {
>  register char *ptr;
>  char *host_err_str();
>  register struct hostent *hostptr;
> 
>  while (--argc > 0)
>  {
>   ptr= *++argv;
>   if ( (hostptr = gethostbyname(ptr)) == NULL)
>   {
>    err_ret("gethostbyname error for host: %s %s", ptr, host_err_str());
>    continue;
>   }
>    printf ("official host name: %s\n", hostptr->h_name);
>   /* go through the list of aliases*/
>   while ( (ptr = *(hostptr->h_aliases)) != NULL)
>   {
>    printf("alias:%s\n", ptr);
>    hostptr->h_aliases++;
>   }
>   printf(" addr type= %d, addr length = %d\n", hostptr->h_addrtype,
> hostptr->h_length);
>   switch ( hostptr->h_addrtype )
>   {
>    case AF_INET: pr_inet(hostptr->h_addr_list, hostptr->h_length);
>                  break;
>    default: err_ret("unknown address type");
>             break;
>   }
>  }
> }
> 
> pr_inet(listptr, length)
> char **listptr;
> int length;
> {
>  struct in_addr *ptr;
>  while ( (ptr = struct in_addr *) *listptr++) != NULL) */
>  {
>   printf ("     Internet address: %s\n", inet_ntoa(*ptr));
>  }
> }
> 
> 
> 
> But send next errors, when i compile  
> 
> 
>  gcc p.c -o p
> 
> 
>  In function `main': 
>  18: warning: assignment makes pointer from integer without a cast
>  In function `pr_inet':
>  49: warning: assignment from incompatible pointer type
>  Undefined                       first referenced
>  symbol                             in file
> gethostbyname                       /var/tmp/ccIkvU0H.o
> inet_ntoa                           /var/tmp/ccIkvU0H.o
> host_err_str                        /var/tmp/ccIkvU0H.o
> err_ret                             /var/tmp/ccIkvU0H.o
> ld: fatal: Symbol referencing errors. No output written to p
> collect2: ld returned 1 exit status
> 
> 
> any ideas..?????
> 
> :-(
> 
> 
> 
> 
> 
> 
> 
> 
> 
>