>Number:         1437
>Category:       kern
>Synopsis:       process with a pty still lives after the parent got killed
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Sep  5 12:50:00 1995
>Last-Modified:
>Originator:     & van der Linden
>Organization:
	
>Release:        Sep 2nd
>Environment:
	
System: NetBSD sheep 1.0A NetBSD 1.0A (SHEEP) #28: Sat Sep 2 21:59:52 MET DST 1995 root@sheep:/usr/src/sys/arch/i386/compile/SHEEP i386


>Description:
Both window(1) and screen (from ftp.uni-erlangen.de/pub/utilities/screen)
still have processes running on pty's after you've ended the utility.
	
>How-To-Repeat:
Output of ps lx before the start of window(1):
  UID   PID  PPID CPU PRI NI   VSZ  RSS WCHAN  STAT TT       TIME COMMAND
   10   106     1   0  18  0   624  572 pause  Ss   v1    0:00.65 -tcsh (tcsh)
   10   343   106   5  29  0   260  176 -      R+   v1    0:00.04 ps -lx 

Output of ps x while using window(1):
  UID   PID  PPID CPU PRI NI   VSZ  RSS WCHAN  STAT TT       TIME COMMAND
   10   345   344   3   3  0   612  500 ttyin  Ss+  p0    0:00.19 -csh (tcsh)
   10   346   344   0  18  0   612  500 pause  Ss   p1    0:00.24 -csh (tcsh)
   10   349   346   0  28  0   264  176 -      R+   p1    0:00.04 ps -lx 
   10   106     1   0  18  0   624  576 pause  Ss   v1    0:00.67 -tcsh (tcsh)
   10   344   106   0   2  0   252  496 select S+   v1    0:00.17 window 

Output of ps x after quiting window(1):
  UID   PID  PPID CPU PRI NI   VSZ  RSS WCHAN  STAT TT       TIME COMMAND
-> 10   345     1   3   3  0   612  500 ttyin  Ss+  p0    0:00.19 -csh (tcsh)
-> 10   346     1   0   3  0   612  512 ttyin  Ss+  p1    0:00.24 -csh (tcsh)
   10   106     1   1  18  0   624  568 pause  Ss   v1    0:00.69 -tcsh (tcsh)
   10   350   106   4  29  0   260  176 -      R+   v1    0:00.03 ps -lx 

Note the processes preceded by "->": their parent (344) got killed but
345 and 346 are still alive.
	
>Fix:
 Dunno yet, will look into it.
	
>Audit-Trail:
>Unformatted: