[9fans] Help!

[bawei@yahoo.com]

This is a program for testing.

#include <u.h>
#include <libc.h>
  int dfd[1000];
  int num;
int echo_server(void)
{
  int pid;
  int i;
  char buf[256];
  int lcfd;
  int clnum;
   char adir[40], ldir[40];
   int n;
  num=0;
  if(announce("tcp!*!8888", adir) < 0) return -1;
  for(;;){
    lcfd = listen(adir, ldir);//listen for a call
    if(lcfd < 0) return -1;
        dfd[num] = accept(lcfd, ldir);
       if(dfd[num] < 0) return -1;
        print("num : %d\n",dfd[num]);

      clnum=num;
      num++;
    pid = rfork(RFPROC|RFMEM);
    switch(pid){// fork a process to echo
      case 0:
      print("%s\n",ldir);
        while((n = read(dfd[clnum], buf, sizeof(buf))) > 0)      {for (i=0;i<num;i++)write(dfd[i], buf, n);   }
        exits(0);
      case -1:
        perror("forking");
      default:
        close(lcfd);
        break;
    }
  }
}
void main(){
  echo_server();
}

And I try to connect from my Windows.

term% 8.out
num : 5
/net/tcp/2
num : 6
/net/tcp/3
..
num : 99
8.out 1497: warning: process exceeds 100 file descriptors
..
num : 110
/net/tcp/106
8.out 1497: suicide: sys: trap: fault read addr=0x0 pc=0x00000000

Some other time I retry it.
term% 8.out
num : 5
/net/tcp/2
..
num : 515
/net/tcp/511

And cannot connect.
What's wrong?

Thanks.