| /*- |
| * 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 |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _BSD_SYS_SIGIO_H_ |
| #define _BSD_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 /* _BSD_SYS_SIGIO_H_ */ |
