title: systemtap tcp connections script error
body: <p>i am trying to run this script , and it shows no tcp connections any ideas? OS: centos 6.3</p>
  
  <pre><code>#! /usr/bin/env stap
  
  probe begin {
    printf("%6s %16s %6s %6s %16s\n",
           "UID", "CMD", "PID", "PORT", "IP_SOURCE")
  }
  
  probe kernel.function("tcp_accept").return?,
        kernel.function("inet_csk_accept").return? {
    sock = $return
    if (sock != 0)
      printf("%6d %16s %6d %6d %16s\n", uid(), execname(), pid(),
             inet_get_local_port(sock), inet_get_ip_source(sock))
  }
  </code></pre>
  
  <p><strong>OUTPUT:</strong></p>
  
  <pre><code>[root@server src]# ./tcp_con.stp 
     Missing separate debuginfos, use: debuginfo-install kernel-2.6.32-279.1.1.el6.centos.plus.x86_64 
     UID              CMD    PID   PORT        IP_SOURCE
  </code></pre>