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[[!meta copyright="Copyright © 2009, 2010 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
The GNU Hurd uses a similar concept to [[UNIX processes|unix/process]].
As a [[Mach task|microkernel/mach/task]] only implements a part of a UNIX
process, there is additional work to be done, for example for [[signal]]s,
[[environment_variable]]s, [[file_descriptor]]s.
# Controlling TTY
Hurd controlling tty behavior is generally consistent with BSD's, including
`TIOCSCTTY`. Linux also has `TIOCSCTTY` and it is harmless to use it there.
But BSD and Hurd never do an implicit `TIOCSCTTY` (hence our `O_NOCTTY` is
zero).
C.f. <http://lists.gnu.org/archive/html/bug-hurd/2009-10/msg00030.html> and the
following messages.
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