Using one ups to follow a child

From: Rod Armstrong (rod_at_san-jose.tt.slb.com)
Date: Tue May 21 2002 - 20:22:45 BST

  • Next message: Bob Carragher: "Re: Using one ups to follow a child" 
    I forgot to add that one can follow the child using just one instance of
ups if you want:

1. ups parent &
   The parent code did this:
  if((child_pid = vfork()) == FALSE)
  {                            
    /* this is the child */
    ....
  }
  else
  {
    /* this is the parent */
    kill(child_pid, 23);       <<< insert this breakpoint code. 23 is SIGSTOP
    printf("child pid is %d\n", child_pid);  << breakpoint code to get pid
    ....
  }
  #stop;  <<<<<<<<< stop here to follow the child

2. At the #stop, edit the target name to the child name, press RET.

3. Attach to the <pid>.

4. From an xterm, continue the child:
   kill -CONT <pid>

5. In ups, put a break on main() or whatever, and continue.

Rod

    This archive was generated by hypermail 2.1.4 : Thu May 23 2002 - 15:54:15 BST