* anaconda: Record the PID of the forked process that handles

   spawning the shell when you are using the VNC mode.
   * iutil.py (execWithRedirect):  If we see /tmp/vncshell.pid,
   record the PID of whatever we just spawned.
   * exception.py (handleException):  If we see /tmp/vncshell.pid,
   open it and kill everything listed.  Attempt to reclaim std IO.
   Drop to pdb after we have made sure the shell and spawning loop
   are dead.

   Generic comment:  Statements like "if not child:" are misleading
   because that test would be true if it actually was the child.  I
   have changed a few to "if child == 0:" to make it more readable.

1 files changed, 24 insertions, 0 deletions

diff --git a/exception.py b/exception.py
index 292f826dc..31f8b0835 100644
--- a/exception.py
+++ b/exception.py
@@ -367,6 +367,30 @@ def handleException(dispatch, intf, (type, value, tb)):
         elif rc == 1:
             intf.__del__ ()
             print text
+
+            pidfl = "/tmp/vncshell.pid"
+            if os.path.exists(pidfl) and os.path.isfile(pidfl):
+                pf = open(pidfl, "r")
+                for pid in pf.readlines():
+                    if not int(pid) == os.getpid():
+                        os.kill(int(pid), signal.SIGKILL)
+                pf.close()
+
+            os.open("/dev/console", os.O_RDWR)   # reclaim stdin
+            os.dup2(0, 1)                        # reclaim stdout
+            os.dup2(0, 2)                        # reclaim stderr
+            #   ^
+            #   |
+            #   +------ dup2 is magic, I tells ya!
+
+            # bring back the echo
+            import termios
+            si = sys.stdin.fileno()
+            attr = termios.tcgetattr(si)
+            attr[3] = attr[3] & termios.ECHO
+            termios.tcsetattr(si, termios.TCSADRAIN, attr)
+
+            print "\nEntering debugger..."
             import pdb
             pdb.post_mortem (tb)
             os.kill(os.getpid(), signal.SIGKILL)