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/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)filedesc.h 8.1 (Berkeley) 6/2/93
* $FreeBSD: release/9.1.0/sys/sys/sigio.h 139825 2005-01-07 02:29:27Z imp $
*/
#ifndef _SYS_SIGIO_H_
#define _SYS_SIGIO_H_
/*
* This structure holds the information needed to send a SIGIO or
* a SIGURG signal to a process or process group when new data arrives
* on a device or socket. The structure is placed on an SLIST belonging
* to the proc or pgrp so that the entire list may be revoked when the
* process exits or the process group disappears.
*
* (c) const
* (pg) locked by either the process or process group lock
*/
struct sigio {
union {
struct proc *siu_proc; /* (c) process to receive SIGIO/SIGURG */
struct pgrp *siu_pgrp; /* (c) process group to receive ... */
} sio_u;
SLIST_ENTRY(sigio) sio_pgsigio; /* (pg) sigio's for process or group */
struct sigio **sio_myref; /* (c) location of the pointer that holds
* the reference to this structure */
struct ucred *sio_ucred; /* (c) current credentials */
pid_t sio_pgid; /* (c) pgid for signals */
};
#define sio_proc sio_u.siu_proc
#define sio_pgrp sio_u.siu_pgrp
SLIST_HEAD(sigiolst, sigio);
pid_t fgetown(struct sigio **sigiop);
int fsetown(pid_t pgid, struct sigio **sigiop);
void funsetown(struct sigio **sigiop);
void funsetownlst(struct sigiolst *sigiolst);
#endif /* _SYS_SIGIO_H_ */