Annotation of sys/compat/freebsd/freebsd_signal.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: freebsd_signal.c,v 1.3 2003/06/02 23:28:00 millert Exp $ */
! 2: /* $NetBSD: kern_sig.c,v 1.54 1996/04/22 01:38:32 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1997 Theo de Raadt. All rights reserved.
! 6: * Copyright (c) 1982, 1986, 1989, 1991, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: * (c) UNIX System Laboratories, Inc.
! 9: * All or some portions of this file are derived from material licensed
! 10: * to the University of California by American Telephone and Telegraph
! 11: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 12: * the permission of UNIX System Laboratories, Inc.
! 13: *
! 14: * Redistribution and use in source and binary forms, with or without
! 15: * modification, are permitted provided that the following conditions
! 16: * are met:
! 17: * 1. Redistributions of source code must retain the above copyright
! 18: * notice, this list of conditions and the following disclaimer.
! 19: * 2. Redistributions in binary form must reproduce the above copyright
! 20: * notice, this list of conditions and the following disclaimer in the
! 21: * documentation and/or other materials provided with the distribution.
! 22: * 3. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: *
! 38: * @(#)kern_sig.c 8.7 (Berkeley) 4/18/94
! 39: */
! 40:
! 41: #include <sys/param.h>
! 42: #include <sys/proc.h>
! 43: #include <sys/signalvar.h>
! 44: #include <sys/signal.h>
! 45: #include <sys/systm.h>
! 46: #include <sys/mount.h>
! 47:
! 48: #include <compat/freebsd/freebsd_signal.h>
! 49: #include <compat/freebsd/freebsd_syscallargs.h>
! 50:
! 51: static void freebsd_to_openbsd_sigaction(struct freebsd_sigaction *,
! 52: struct sigaction *);
! 53:
! 54: static void openbsd_to_freebsd_sigaction(struct sigaction *,
! 55: struct freebsd_sigaction *);
! 56:
! 57: static void
! 58: openbsd_to_freebsd_sigaction(obsa, fbsa)
! 59: struct sigaction *obsa;
! 60: struct freebsd_sigaction *fbsa;
! 61: {
! 62: bzero(fbsa, sizeof(struct freebsd_sigaction));
! 63: fbsa->freebsd_sa_handler = obsa->sa_handler;
! 64: bcopy(&obsa->sa_mask, &fbsa->freebsd_sa_mask.__bits[0],
! 65: sizeof(sigset_t));
! 66: fbsa->freebsd_sa_flags = obsa->sa_flags;
! 67: }
! 68:
! 69: static void
! 70: freebsd_to_openbsd_sigaction(fbsa, obsa)
! 71: struct freebsd_sigaction *fbsa;
! 72: struct sigaction *obsa;
! 73: {
! 74: obsa->sa_handler = fbsa->freebsd_sa_handler;
! 75: bcopy(&fbsa->freebsd_sa_mask.__bits[0], &obsa->sa_mask,
! 76: sizeof(sigset_t));
! 77: obsa->sa_flags = fbsa->freebsd_sa_flags;
! 78: }
! 79:
! 80: /* ARGSUSED */
! 81: int
! 82: freebsd_sys_sigaction40(p, v, retval)
! 83: struct proc *p;
! 84: void *v;
! 85: register_t *retval;
! 86: {
! 87: register struct freebsd_sys_sigaction40_args /* {
! 88: syscallarg(int) sig;
! 89: syscallarg(struct freebsd_sigaction *) act;
! 90: syscallarg(struct freebsd_sigaction *) oact;
! 91: } */ *uap = v;
! 92: struct sigaction vec;
! 93: register struct sigaction *sa;
! 94: struct freebsd_sigaction fbsa;
! 95: register struct sigacts *ps = p->p_sigacts;
! 96: register int signum;
! 97: int bit, error;
! 98:
! 99: signum = SCARG(uap, sig);
! 100: if (signum <= 0 || signum >= NSIG ||
! 101: (SCARG(uap, act) && (signum == SIGKILL || signum == SIGSTOP)))
! 102: return (EINVAL);
! 103: sa = &vec;
! 104: if (SCARG(uap, oact)) {
! 105: sa->sa_handler = ps->ps_sigact[signum];
! 106: sa->sa_mask = ps->ps_catchmask[signum];
! 107: bit = sigmask(signum);
! 108: sa->sa_flags = 0;
! 109: if ((ps->ps_sigonstack & bit) != 0)
! 110: sa->sa_flags |= SA_ONSTACK;
! 111: if ((ps->ps_sigintr & bit) == 0)
! 112: sa->sa_flags |= SA_RESTART;
! 113: if ((ps->ps_sigreset & bit) != 0)
! 114: sa->sa_flags |= SA_RESETHAND;
! 115: if ((ps->ps_siginfo & bit) != 0)
! 116: sa->sa_flags |= SA_SIGINFO;
! 117: if (signum == SIGCHLD) {
! 118: if ((p->p_flag & P_NOCLDSTOP) != 0)
! 119: sa->sa_flags |= SA_NOCLDSTOP;
! 120: if ((p->p_flag & P_NOCLDWAIT) != 0)
! 121: sa->sa_flags |= SA_NOCLDWAIT;
! 122: }
! 123: if ((sa->sa_mask & bit) == 0)
! 124: sa->sa_flags |= SA_NODEFER;
! 125: sa->sa_mask &= ~bit;
! 126: openbsd_to_freebsd_sigaction(sa, &fbsa);
! 127: error = copyout((caddr_t)&fbsa, (caddr_t)SCARG(uap, oact),
! 128: sizeof (struct freebsd_sigaction));
! 129: if (error)
! 130: return (error);
! 131: }
! 132: if (SCARG(uap, act)) {
! 133: error = copyin((caddr_t)SCARG(uap, act), (caddr_t)&fbsa,
! 134: sizeof (struct freebsd_sigaction));
! 135: if (error)
! 136: return (error);
! 137: freebsd_to_openbsd_sigaction(&fbsa, sa);
! 138: setsigvec(p, signum, sa);
! 139: }
! 140: return (0);
! 141: }
! 142:
! 143: /* ARGSUSED */
! 144: int
! 145: freebsd_sys_sigpending40(p, v, retval)
! 146: struct proc *p;
! 147: void *v;
! 148: register_t *retval;
! 149: {
! 150: register struct freebsd_sys_sigpending40_args /* {
! 151: freebsd_sigset_t *set;
! 152: } */ *uap = v;
! 153: freebsd_sigset_t fss;
! 154:
! 155: bcopy(&p->p_siglist, &fss.__bits[0], sizeof(sigset_t));
! 156: return (copyout((caddr_t)&fss, (caddr_t)SCARG(uap, set), sizeof(fss)));
! 157: }
! 158:
! 159: int
! 160: freebsd_sys_sigprocmask40(p, v, retval)
! 161: register struct proc *p;
! 162: void *v;
! 163: register_t *retval;
! 164: {
! 165: struct freebsd_sys_sigprocmask40_args /* {
! 166: syscallarg(int) how;
! 167: syscallarg(freebsd_sigset_t *) set;
! 168: syscallarg(freebsd_sigset_t *) oset;
! 169: } */ *uap = v;
! 170: freebsd_sigset_t nss, oss;
! 171: sigset_t obnss;
! 172: int error = 0;
! 173:
! 174: if (SCARG(uap, set)) {
! 175: error = copyin(SCARG(uap, set), &nss, sizeof(nss));
! 176: if (error)
! 177: return (error);
! 178: }
! 179: if (SCARG(uap, oset)) {
! 180: bzero(&oss, sizeof(freebsd_sigset_t));
! 181: bcopy(&p->p_sigmask, &oss.__bits[0], sizeof(sigset_t));
! 182: error = copyout((caddr_t)&oss, (caddr_t)SCARG(uap, oset),
! 183: sizeof(freebsd_sigset_t));
! 184: if (error)
! 185: return (error);
! 186: }
! 187: if (SCARG(uap, set)) {
! 188: bcopy(&nss.__bits[0], &obnss, sizeof(sigset_t));
! 189: (void)splhigh();
! 190: switch (SCARG(uap, how)) {
! 191: case SIG_BLOCK:
! 192: p->p_sigmask |= obnss &~ sigcantmask;
! 193: break;
! 194: case SIG_UNBLOCK:
! 195: p->p_sigmask &= ~obnss;
! 196: break;
! 197: case SIG_SETMASK:
! 198: p->p_sigmask = obnss &~ sigcantmask;
! 199: break;
! 200: default:
! 201: error = EINVAL;
! 202: break;
! 203: }
! 204: (void) spl0();
! 205: }
! 206: return (error);
! 207: }
! 208:
! 209: int
! 210: freebsd_sys_sigsuspend40(p, v, retval)
! 211: register struct proc *p;
! 212: void *v;
! 213: register_t *retval;
! 214: {
! 215: struct freebsd_sys_sigsuspend40_args /* {
! 216: syscallarg(freebsd_sigset_t *) sigmask;
! 217: } */ *uap = v;
! 218: register struct sigacts *ps = p->p_sigacts;
! 219: freebsd_sigset_t fbset;
! 220: sigset_t obset;
! 221:
! 222: copyin(SCARG(uap, sigmask), &fbset, sizeof(freebsd_sigset_t));
! 223: bcopy(&fbset.__bits[0], &obset, sizeof(sigset_t));
! 224: /*
! 225: * When returning from sigpause, we want
! 226: * the old mask to be restored after the
! 227: * signal handler has finished. Thus, we
! 228: * save it here and mark the sigacts structure
! 229: * to indicate this.
! 230: */
! 231: ps->ps_oldmask = p->p_sigmask;
! 232: ps->ps_flags |= SAS_OLDMASK;
! 233: p->p_sigmask = obset &~ sigcantmask;
! 234: while (tsleep((caddr_t) ps, PPAUSE|PCATCH, "pause", 0) == 0)
! 235: /* void */;
! 236: /* always return EINTR rather than ERESTART... */
! 237: return (EINTR);
! 238: }
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