[Bug 3046] New: ControlPersist with -v causes stderr to be left open until the master times out

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Mon Jul 29 17:01:34 AEST 2019


https://bugzilla.mindrot.org/show_bug.cgi?id=3046

            Bug ID: 3046
           Summary: ControlPersist with -v causes stderr to be left open
                    until the master times out
           Product: Portable OpenSSH
           Version: 7.9p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: johannes at sipsolutions.net

In similar fashion as bug #1988 but with -v, the stderr file descriptor
is left open and a script reading from stderr will hang until the
master times out, so I guess the FD should be closed when detaching.

It's a little unfortunate that this would make debugging a bit more
difficult, but OTOH debugging would now get printed to an FD that
shouldn't really have much relation to the control process. So it's
better to debug the master with -y, in which case of course this cannot
happen.

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