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https://bugzilla.novell.com/show_bug.cgi?id=447289

User werner@xxxxxxxxxx added comment
https://bugzilla.novell.com/show_bug.cgi?id=447289#c17





--- Comment #17 from Dr. Werner Fink <werner@xxxxxxxxxx>  2009-01-23 05:34:41 
MST ---
IMHo this kernel is broken ... it could be OK to fail TIOCGSID for with
ENOTTY if the terminal is not a master pseudo-terminal and not our controlling
terminal. In this case the TIOCSCTTY should succeed, from the manual page
tty_ioctl(4):

   Controlling terminal
       TIOCSCTTY int arg
              Make the given terminal the controlling terminal of the calling
              process.  The calling process must be a session  leader  and not
              have a controlling terminal already.  If this terminal is already
              the controlling terminal of a different session group then the
              ioctl fails with EPERM, unless the caller  is  root (more
              precisely:  has  the  CAP_SYS_ADMIN  capability) and arg equals
1,
              in which case the terminal is stolen, and all processes that had
              it as controlling terminal lose it.

...

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