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/* Per-open information for channelio.
Copyright (C) 1995, 1996, 2007 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
Reworked for channelio by Carl Fredrik Hammar <hammy.lite@gmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef __OPEN_H__
#define __OPEN_H__
#include <pthread.h>
#include <hurd/channel.h>
/* Information about an open session. */
struct open
{
pthread_mutex_t lock;
struct channel *channel;
/* The current owner of the session. For terminals, this affects
controlling terminal behavior (see term_become_ctty). For all
objects this affects old-style async IO. Negative values represent
pgrps. This has nothing to do with the owner of a file (as returned
by io_stat, and as used for various permission checks by
filesystems). An owner of 0 indicates that there is no owner. */
pid_t owner;
};
/* Returns a new per-open structure in OPEN that wraps CHANNEL.
Propagates any error. */
error_t open_alloc (struct channel *channel, struct open **open);
/* Free OPEN and any resources it holds. */
void open_free (struct open *open);
#endif /* __OPEN_H__ */
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