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