/* $NetBSD: svr4_signal.c,v 1.1 1994/10/24 17:37:44 deraadt Exp $ */ /* * Copyright (c) 1994 Christos Zoulas * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int svr4_signumcvt(sn) int sn; { switch (sn) { case SVR4_SIGHUP: return SIGHUP; case SVR4_SIGINT: return SIGINT; case SVR4_SIGQUIT: return SIGQUIT; case SVR4_SIGILL: return SIGILL; case SVR4_SIGTRAP: return SIGTRAP; case SVR4_SIGABRT: return SIGABRT; case SVR4_SIGEMT: return SIGEMT; case SVR4_SIGFPE: return SIGFPE; case SVR4_SIGKILL: return SIGKILL; case SVR4_SIGBUS: return SIGBUS; case SVR4_SIGSEGV: return SIGSEGV; case SVR4_SIGSYS: return SIGSYS; case SVR4_SIGPIPE: return SIGPIPE; case SVR4_SIGALRM: return SIGALRM; case SVR4_SIGTERM: return SIGTERM; case SVR4_SIGUSR1: return SIGUSR1; case SVR4_SIGUSR2: return SIGUSR2; case SVR4_SIGCHLD: return SIGCHLD; case SVR4_SIGPWR: return NSIG; case SVR4_SIGWINCH: return SIGWINCH; case SVR4_SIGURG: return SIGURG; case SVR4_SIGIO: return SIGIO; case SVR4_SIGSTOP: return SIGSTOP; case SVR4_SIGTSTP: return SIGTSTP; case SVR4_SIGCONT: return SIGCONT; case SVR4_SIGTTIN: return SIGTTIN; case SVR4_SIGTTOU: return SIGTTOU; case SVR4_SIGVTALRM:return SIGVTALRM; case SVR4_SIGPROF: return SIGPROF; case SVR4_SIGXCPU: return SIGXCPU; case SVR4_SIGXFSZ: return SIGXFSZ; default: return NSIG; } } /* * Stolen from the ibcs2 one */ int svr4_signal(p, uap, retval) register struct proc *p; register struct svr4_signal_args *uap; register_t *retval; { int nsig = svr4_signumcvt(SVR4_SIGNO(SCARG(uap, signum))); int error; if (nsig == NSIG) { if (SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGNAL_MASK || SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGDEFER_MASK) *retval = (int)SVR4_SIG_ERR; return EINVAL; } stackgap_init(); switch (SVR4_SIGCALL(SCARG(uap, signum))) { /* * sigset is identical to signal() except that SIG_HOLD is allowed as * an action and we don't set the bit in the ibcs_sigflags field. */ case SVR4_SIGDEFER_MASK: if (SCARG(uap, handler) == SVR4_SIG_HOLD) { struct sigprocmask_args sa; SCARG(&sa, how) = SIG_BLOCK; SCARG(&sa, mask) = sigmask(nsig); return sigprocmask(p, &sa, retval); } /*FALLTHROUGH*/ case SVR4_SIGNAL_MASK: { struct sigaction_args sa_args; struct sigaction *sap = stackgap_alloc(sizeof(struct sigaction)); struct sigaction *osap = stackgap_alloc(sizeof(struct sigaction)); struct sigaction sa; SCARG(&sa_args, signum) = nsig; SCARG(&sa_args, nsa) = sap; SCARG(&sa_args, osa) = osap; sa.sa_handler = SCARG(uap, handler); sa.sa_mask = (sigset_t)0; sa.sa_flags = 0; #if 0 if (nsig != SIGALRM) sa.sa_flags = SA_RESTART; #endif error = copyout(&sa, sap, sizeof(sa)); if (error) return error; error = sigaction(p, &sa_args, retval); if (error) { DPRINTF(("signal: sigaction failed: %d\n", error)); *retval = (int)SVR4_SIG_ERR; return error; } error = copyin(osap, &sa, sizeof(sa)); if (error) return error; *retval = (int)sa.sa_handler; if (SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGNAL_MASK) p->p_md.ibcs_sigflags |= sigmask(nsig); return 0; } case SVR4_SIGHOLD_MASK: { struct sigprocmask_args sa; SCARG(&sa, how) = SIG_BLOCK; SCARG(&sa, mask) = sigmask(nsig); return sigprocmask(p, &sa, retval); } case SVR4_SIGRELSE_MASK: { struct sigprocmask_args sa; SCARG(&sa, how) = SIG_UNBLOCK; SCARG(&sa, mask) = sigmask(nsig); return sigprocmask(p, &sa, retval); } case SVR4_SIGIGNORE_MASK: { struct sigaction *sap = stackgap_alloc(sizeof(struct sigaction)); struct sigaction sa; struct sigaction_args sa_args; SCARG(&sa_args, signum) = nsig; SCARG(&sa_args, nsa) = sap; SCARG(&sa_args, osa) = NULL; sa.sa_handler = SIG_IGN; sa.sa_mask = (sigset_t)0; sa.sa_flags = 0; error = copyout(&sa, sap, sizeof(sa)); if (error) return error; error = sigaction(p, &sa_args, retval); if (error) { DPRINTF(("sigignore: sigaction failed\n")); return error; } return 0; } case SVR4_SIGPAUSE_MASK: { struct sigsuspend_args sa; SCARG(&sa, mask) = p->p_sigmask &~ sigmask(nsig); return sigsuspend(p, &sa, retval); } default: return ENOSYS; } }