[Bug 396] New: sshd orphans processes when no pty allocated

[bugzilla-daemon at mindrot.org]

http://bugzilla.mindrot.org/show_bug.cgi?id=396

           Summary: sshd orphans processes when no pty allocated
           Product: Portable OpenSSH
           Version: -current
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: sshd
        AssignedTo: openssh-unix-dev at mindrot.org
        ReportedBy: dtucker at zip.com.au


When using ssh to run a command that doesn't terminate, sshd will leave the 
process orphaned when it exits.  Using ssh -t to force a pty allocation allows 
the process to terminate when sshd does (presumably when the pty closes).  This 
has been observed on Solaris (7,8) and AIX, and probably occurs on others.

# ssh localhost nc localhost 22
SSH-2.0-OpenSSH_3.4p1
[kill ssh from another window]
# ps -eaf |grep nc
 dtucker  5919     1  0 21:05:08 ?        0:00 nc localhost 22

The following patch (against -cvs) sends a HUP to the child process(es) when 
sshd exits for protcols 1 and 2.  It assumes that there's only one session for 
v1. (Is that valid?)

It has been tested on Solaris 7 (including regression tests).



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