signalmap.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1996 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.2 */
#include "signalmap.h"
#include <sys/signal.h>
#include <sys/errno.h>
extern int errno;
void (*handlers[32])(); /* XXX - 32??? NSIG, maybe? */
void maphandler(sig, code, scp, addr)
int sig, code;
struct sigcontext *scp;
char *addr;
{
switch (sig) {
case SIGBUS:
case SIGSEGV:
switch (FC_CODE(code)) {
case 3: /* 5.x value for FC_OBJERR */
code = FC_MAKE_ERR(FC_ERRNO(code));
break;
case 5: /* 5.x value for FC_NOMAP */
code = FC_NOMAP;
break;
}
break;
}
__sendsig(maptooldsig(sig), code, scp, addr, handlers[sig]);
}
void (*signal(sig, a))()
int sig;
void (*a)();
{
int newsig;
struct sigvec osv, sv;
sv.sv_handler = a;
sv.sv_mask = 0;
#ifdef S5EMUL
sv.sv_flags = SV_INTERRUPT|SV_RESETHAND;
#else
sv.sv_flags = 0;
#endif
if (sigvec(sig, &sv, &osv) < 0)
return (BADSIG);
return (osv.sv_handler);
}
sigvec(sig, nvec, ovec)
int sig;
struct sigvec *nvec, *ovec;
{
int newsig;
struct sigvec tvec, *tvecp;
void (*oldhand)();
if ((int)nvec == -1 || (int)ovec == -1) {
errno = EFAULT;
return (-1);
}
newsig = maptonewsig(sig);
oldhand = handlers[newsig];
if ((tvecp = nvec) != 0) {
tvec = *nvec;
tvecp = &tvec;
/*
* To be compatible with the behavior of SunOS 4.x:
* If the new signal handler is SIG_IGN or SIG_DFL,
* do not change the signal's entry in the handler array.
* This allows a child of vfork(2) to set signal handlers
* to SIG_IGN or SIG_DFL without affecting the parent.
*/
if (tvecp->sv_handler != SIG_DFL &&
tvecp->sv_handler != SIG_IGN) {
handlers[newsig] = tvecp->sv_handler;
tvecp->sv_handler = maphandler;
}
}
if (ucbsigvec(newsig, tvecp, ovec) == -1) {
handlers[newsig] = oldhand;
return (-1);
}
if (ovec && ovec->sv_handler != SIG_DFL && ovec->sv_handler != SIG_IGN)
ovec->sv_handler = oldhand;
return (0);
}
sigsetmask(mask)
int mask;
{
int ret;
ret = ucbsigsetmask(maptonewmask(mask));
return(maptooldmask(ret));
}
sigblock(mask)
int mask;
{
int ret;
ret = ucbsigblock(maptonewmask(mask));
return(maptooldmask(ret));
}
int sigpause(mask)
int mask;
{
int ret;
return(ucbsigpause(maptonewmask(mask)));
}
siginterrupt(sig, flag)
int sig, flag;
{
return(ucbsiginterrupt(maptonewsig(sig), flag));
}
maptonewsig(sig)
int sig;
{
switch (sig) {
case SIGURG: /* urgent condition on IO channel */
return(XSIGURG);
case SIGSTOP: /* sendable stop signal not from tty */
return(XSIGSTOP);
case SIGTSTP: /* stop signal from tty */
return(XSIGTSTP);
case SIGCONT: /* continue a stopped process */
return(XSIGCONT);
case SIGCLD: /* System V name for SIGCHLD */
return(XSIGCLD);
case SIGTTIN: /* to readers pgrp upon background tty read */
return(XSIGTTIN);
case SIGTTOU: /* like TTIN for output */
return(XSIGTTOU);
case SIGIO: /* input/output possible signal */
return(XSIGIO);
case SIGXCPU: /* exceeded CPU time limit */
return(XSIGXCPU);
case SIGXFSZ: /* exceeded file size limit */
return(XSIGXFSZ);
case SIGVTALRM: /* virtual time alarm */
return(XSIGVTALRM);
case SIGPROF: /* profiling time alarm */
return(XSIGPROF);
case SIGWINCH: /* window changed */
return(XSIGWINCH);
case SIGLOST: /* resource lost, not supported */
return(-1);
case SIGUSR1:
return(XSIGUSR1);
case SIGUSR2: /* user defined signal 2 */
return(XSIGUSR2);
default:
return(sig);
}
}
maptooldsig(sig)
int sig;
{
switch (sig) {
case XSIGURG: /* urgent condition on IO channel */
return(SIGURG);
case XSIGSTOP: /* sendable stop signal not from tty */
return(SIGSTOP);
case XSIGTSTP: /* stop signal from tty */
return(SIGTSTP);
case XSIGCONT: /* continue a stopped process */
return(SIGCONT);
case XSIGCLD: /* System V name for SIGCHLD */
return(SIGCLD);
case XSIGTTIN: /* to readers pgrp upon background tty read */
return(SIGTTIN);
case XSIGTTOU: /* like TTIN for output */
return(SIGTTOU);
case XSIGIO: /* input/output possible signal */
return(SIGIO);
case XSIGXCPU: /* exceeded CPU time limit */
return(SIGXCPU);
case XSIGXFSZ: /* exceeded file size limit */
return(SIGXFSZ);
case XSIGVTALRM: /* virtual time alarm */
return(SIGVTALRM);
case XSIGPROF: /* profiling time alarm */
return(SIGPROF);
case XSIGWINCH: /* window changed */
return(SIGWINCH);
case XSIGUSR1:
return(SIGUSR1);
case XSIGUSR2: /* user defined signal 2 */
return(SIGUSR2);
case XSIGPWR: /* user defined signal 2 */
return(-1);
default:
return(sig);
}
}
int maptooldmask(mask)
int mask;
{
int omask;
omask = mask & 0x7FFF; /* these signo are same */
if (mask & sigmask(XSIGURG))
omask |= sigmask(SIGURG);
if (mask & sigmask(XSIGSTOP))
omask |= sigmask(SIGSTOP);
if (mask & sigmask(XSIGTSTP))
omask |= sigmask(SIGTSTP);
if (mask & sigmask(XSIGCONT))
omask |= sigmask(SIGCONT);
if (mask & sigmask(XSIGCLD))
omask |= sigmask(SIGCLD);
if (mask & sigmask(XSIGTTIN))
omask |= sigmask(SIGTTIN);
if (mask & sigmask(XSIGTTOU))
omask |= sigmask(SIGTTOU);
if (mask & sigmask(XSIGIO))
omask |= sigmask(SIGIO);
if (mask & sigmask(XSIGXCPU))
omask |= sigmask(SIGXCPU);
if (mask & sigmask(XSIGXFSZ))
omask |= sigmask(SIGXFSZ);
if (mask & sigmask(XSIGVTALRM))
omask |= sigmask(SIGVTALRM);
if (mask & sigmask(XSIGPROF))
omask |= sigmask(SIGPROF);
if (mask & sigmask(XSIGWINCH))
omask |= sigmask(SIGWINCH);
if (mask & sigmask(XSIGUSR1))
omask |= sigmask(SIGUSR1);
if (mask & sigmask(XSIGUSR2))
omask |= sigmask(SIGUSR2);
return(omask);
}
int maptonewmask(omask)
int omask;
{
int mask;
if (omask == -1) {
return(-1);
}
mask = omask & 0x7FFF; /* these signo are the same */
if (omask & sigmask(SIGURG))
mask |= sigmask(XSIGURG);
if (omask & sigmask(SIGSTOP))
mask |= sigmask(XSIGSTOP);
if (omask & sigmask(SIGTSTP))
mask |= sigmask(XSIGTSTP);
if (omask & sigmask(SIGCONT))
mask |= sigmask(XSIGCONT);
if (omask & sigmask(SIGCLD))
mask |= sigmask(XSIGCLD);
if (omask & sigmask(SIGTTIN))
mask |= sigmask(XSIGTTIN);
if (omask & sigmask(SIGTTOU))
mask |= sigmask(XSIGTTOU);
if (omask & sigmask(SIGIO))
mask |= sigmask(XSIGIO);
if (omask & sigmask(SIGXCPU))
mask |= sigmask(XSIGXCPU);
if (omask & sigmask(SIGXFSZ))
mask |= sigmask(XSIGXFSZ);
if (omask & sigmask(SIGVTALRM))
mask |= sigmask(XSIGVTALRM);
if (omask & sigmask(SIGPROF))
mask |= sigmask(XSIGPROF);
if (omask & sigmask(SIGWINCH))
mask |= sigmask(XSIGWINCH);
if (omask & sigmask(SIGUSR1))
mask |= sigmask(XSIGUSR1);
if (omask & sigmask(SIGUSR2))
mask |= sigmask(XSIGUSR2);
return(mask);
}