1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate /* 31*7c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 32*7c478bd9Sstevel@tonic-gate * The Regents of the University of California 33*7c478bd9Sstevel@tonic-gate * All Rights Reserved 34*7c478bd9Sstevel@tonic-gate * 35*7c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 36*7c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 37*7c478bd9Sstevel@tonic-gate * contributors. 38*7c478bd9Sstevel@tonic-gate */ 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate /* 43*7c478bd9Sstevel@tonic-gate * This function waits for timo clock ticks for something to arrive on 44*7c478bd9Sstevel@tonic-gate * the specified stream. If more than one client is hanging off of a 45*7c478bd9Sstevel@tonic-gate * single endpoint, and at least one has specified a non-zero timeout, 46*7c478bd9Sstevel@tonic-gate * then all will be woken. 47*7c478bd9Sstevel@tonic-gate * 48*7c478bd9Sstevel@tonic-gate * Returns: 49*7c478bd9Sstevel@tonic-gate * 0 on success or positive error code. On 50*7c478bd9Sstevel@tonic-gate * success, "events" is set to 51*7c478bd9Sstevel@tonic-gate * 0 on timeout or no events(timout = 0), 52*7c478bd9Sstevel@tonic-gate * 1 if desired event has occurred 53*7c478bd9Sstevel@tonic-gate * 54*7c478bd9Sstevel@tonic-gate * Most of the code is from strwaitq(). 55*7c478bd9Sstevel@tonic-gate */ 56*7c478bd9Sstevel@tonic-gate 57*7c478bd9Sstevel@tonic-gate #include <sys/param.h> 58*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 59*7c478bd9Sstevel@tonic-gate #include <sys/proc.h> 60*7c478bd9Sstevel@tonic-gate #include <sys/file.h> 61*7c478bd9Sstevel@tonic-gate #include <sys/user.h> 62*7c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 63*7c478bd9Sstevel@tonic-gate #include <sys/errno.h> 64*7c478bd9Sstevel@tonic-gate #include <sys/stream.h> 65*7c478bd9Sstevel@tonic-gate #include <sys/ioctl.h> 66*7c478bd9Sstevel@tonic-gate #include <sys/stropts.h> 67*7c478bd9Sstevel@tonic-gate #include <sys/strsubr.h> 68*7c478bd9Sstevel@tonic-gate #include <sys/tihdr.h> 69*7c478bd9Sstevel@tonic-gate #include <sys/timod.h> 70*7c478bd9Sstevel@tonic-gate #include <sys/tiuser.h> 71*7c478bd9Sstevel@tonic-gate #include <sys/t_kuser.h> 72*7c478bd9Sstevel@tonic-gate #include <sys/signal.h> 73*7c478bd9Sstevel@tonic-gate #include <sys/siginfo.h> 74*7c478bd9Sstevel@tonic-gate #include <sys/time.h> 75*7c478bd9Sstevel@tonic-gate #include <sys/debug.h> 76*7c478bd9Sstevel@tonic-gate 77*7c478bd9Sstevel@tonic-gate /* 78*7c478bd9Sstevel@tonic-gate * Poll for an input event. 79*7c478bd9Sstevel@tonic-gate * 80*7c478bd9Sstevel@tonic-gate * timo is measured in ticks 81*7c478bd9Sstevel@tonic-gate */ 82*7c478bd9Sstevel@tonic-gate int 83*7c478bd9Sstevel@tonic-gate t_kspoll(TIUSER *tiptr, int timo, int waitflg, int *events) 84*7c478bd9Sstevel@tonic-gate { 85*7c478bd9Sstevel@tonic-gate file_t *fp; 86*7c478bd9Sstevel@tonic-gate vnode_t *vp; 87*7c478bd9Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 88*7c478bd9Sstevel@tonic-gate clock_t timout; /* milliseconds */ 89*7c478bd9Sstevel@tonic-gate int error; 90*7c478bd9Sstevel@tonic-gate u_char pri; 91*7c478bd9Sstevel@tonic-gate int pflag; 92*7c478bd9Sstevel@tonic-gate rval_t rval; 93*7c478bd9Sstevel@tonic-gate 94*7c478bd9Sstevel@tonic-gate fp = tiptr->fp; 95*7c478bd9Sstevel@tonic-gate vp = fp->f_vnode; 96*7c478bd9Sstevel@tonic-gate 97*7c478bd9Sstevel@tonic-gate if (events == NULL || ((waitflg & READWAIT) == 0)) 98*7c478bd9Sstevel@tonic-gate return (EINVAL); 99*7c478bd9Sstevel@tonic-gate 100*7c478bd9Sstevel@tonic-gate /* Convert from ticks to milliseconds */ 101*7c478bd9Sstevel@tonic-gate if (timo < 0) 102*7c478bd9Sstevel@tonic-gate timout = -1; 103*7c478bd9Sstevel@tonic-gate else 104*7c478bd9Sstevel@tonic-gate timout = TICK_TO_MSEC(timo); 105*7c478bd9Sstevel@tonic-gate 106*7c478bd9Sstevel@tonic-gate /* 107*7c478bd9Sstevel@tonic-gate * Indicate that the lwp is not to be stopped while doing 108*7c478bd9Sstevel@tonic-gate * this network traffic. This is to avoid deadlock while 109*7c478bd9Sstevel@tonic-gate * debugging a process via /proc. 110*7c478bd9Sstevel@tonic-gate */ 111*7c478bd9Sstevel@tonic-gate if (lwp != NULL) 112*7c478bd9Sstevel@tonic-gate lwp->lwp_nostop++; 113*7c478bd9Sstevel@tonic-gate 114*7c478bd9Sstevel@tonic-gate if (waitflg & NOINTR) 115*7c478bd9Sstevel@tonic-gate pflag = MSG_ANY | MSG_HOLDSIG; 116*7c478bd9Sstevel@tonic-gate else 117*7c478bd9Sstevel@tonic-gate pflag = MSG_ANY; 118*7c478bd9Sstevel@tonic-gate pri = 0; 119*7c478bd9Sstevel@tonic-gate error = kstrgetmsg(vp, NULL, NULL, &pri, &pflag, timout, &rval); 120*7c478bd9Sstevel@tonic-gate 121*7c478bd9Sstevel@tonic-gate if (lwp != NULL) 122*7c478bd9Sstevel@tonic-gate lwp->lwp_nostop--; 123*7c478bd9Sstevel@tonic-gate 124*7c478bd9Sstevel@tonic-gate /* Set the return *events. */ 125*7c478bd9Sstevel@tonic-gate if (error != 0) { 126*7c478bd9Sstevel@tonic-gate if (error == ETIME) { 127*7c478bd9Sstevel@tonic-gate *events = 0; 128*7c478bd9Sstevel@tonic-gate error = 0; 129*7c478bd9Sstevel@tonic-gate } 130*7c478bd9Sstevel@tonic-gate return (error); 131*7c478bd9Sstevel@tonic-gate } 132*7c478bd9Sstevel@tonic-gate *events = 1; 133*7c478bd9Sstevel@tonic-gate return (0); 134*7c478bd9Sstevel@tonic-gate } 135