Very Computer

Thank you every much!

Jingyan

/*********** server.c ****************
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>

main(argc, argv)
int argc;
char *argv[];
{
 struct servent *servp;
 struct sockaddr_in server, remote;
 int request_sock, new_sock;
 int nfound, fd, maxfd, bytesread, addrlen;
 fd_set rmask,mask;
 static struct timeval timeout = {0,500000}; /* one half second */
 char buf[BUFSIZ];

 if (argc!=2) {
  (void) fprintf(stderr, "usage: %s service\n", argv[0] );
  exit(1);
 }
 if ((request_sock = socket(AF_INET, SOCK_STREAM, 0))<0) {
  perror("socket");
  exit(1);
 }
 if(isdigit(argv[1][0])) {
  static struct servent s;
  servp=&s;
  s.s_port=htons((u_short)atoi(argv[1]));
 }else if ((servp=getservbyname(argv[1],"tcp")) == 0) {
  fprintf(stderr,"%s: unknow service\n");
  exit(1);
 }
 bzero((void *) &server, sizeof server);
 server.sin_family=AF_INET;
 server.sin_addr.s_addr=INADDR_ANY;
 server.sin_port=servp->s_port;//htons(13)

 if (bind(request_sock,(struct sockaddr *) &server, sizeof server )<0) {
  perror("bind");
  exit(1);
 }

 if (listen(request_sock,SOMAXCONN)<0 ){
  perror("listen");
  exit(1);
 }

 FD_ZERO(&mask);
 FD_SET(request_sock, &mask);
 maxfd=request_sock;
 for(;;){
  rmask=mask;
  nfound=select(maxfd+1,&mask, (fd_set *)0, (fd_set *)0, &timeout);
  if(nfound<0) {
   if (errno==EINTR){
    printf("interrupted system call\n");
    continue;
   }
   perror("select");
   exit(1);
  }
  if(nfound==0) {
   printf("."); fflush(stdout);
   continue;
  }
  if(FD_ISSET(request_sock, &mask)){
   addrlen=sizeof(remote);
   new_sock=accept(request_sock, (struct sockaddr *)&remote, &addrlen);
   if(new_sock<0) {
    perror("accept");
    exit(1);
   }
   FD_SET(new_sock, &mask);
   if(new_sock>maxfd)
    maxfd=new_sock;
   FD_CLR( request_sock, &mask);
  }
  for (fd=0;fd<=maxfd;fd++) {

   if(FD_ISSET(fd, &mask)){

    bytesread=read(fd, buf, sizeof buf-1);

    if(bytesread<0){
    perror("read");
   }
   if(bytesread<=0){

    FD_CLR(fd, &mask);
    if (close(fd)) perror("close");
    continue;
   }
   buf[bytesread]='\0';
   printf("%s: %d ",argv[0],bytesread,fd,buf);
   }
  }
 }

Quote:};

this will include libsocket.a at /usr/lib/.

% gcc -o server server.o -lnet

This says to link in the library libnet.a   .. it might be what you
need.  Otherwise look at your documentation and find out what library
Sun put the functions: socket, accept, bind, getserverbyname, and listen
in.  

--

  http://www.tranquility.net/~kturvey/resume/resume.html
--------------------------------------------------------
  It would be an absurdity for jurors to be required to accept the judge's
  view of the law, against their own opinion, judgment, and conscience.
        -- John Adams

    Ian