FreeBSD/Linux Kernel Cross Reference
sys/compat/common/kern_sig_43.c

     /*      $NetBSD: kern_sig_43.c,v 1.32 2008/04/28 20:23:41 martin Exp $  */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum.
      *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: kern_sig_43.c,v 1.32 2008/04/28 20:23:41 martin Exp $");
    
    #if defined(_KERNEL_OPT)
    #include "opt_compat_netbsd.h"
    #endif
    
    #include <sys/param.h>
    #include <sys/signalvar.h>
    #include <sys/resourcevar.h>
    #include <sys/namei.h>
    #include <sys/vnode.h>
    #include <sys/proc.h>
    #include <sys/systm.h>
    #include <sys/timeb.h>
    #include <sys/times.h>
    #include <sys/buf.h>
    #include <sys/acct.h>
    #include <sys/file.h>
    #include <sys/kernel.h>
    #include <sys/wait.h>
    #include <sys/ktrace.h>
    #include <sys/syslog.h>
    #include <sys/stat.h>
    #include <sys/core.h>
    #include <sys/kauth.h>
    
    #include <sys/mount.h>
    #include <sys/syscallargs.h>
    
    #include <sys/cpu.h>
    
    #include <sys/user.h>           /* for coredump */
    
    #include <compat/sys/signal.h>
    
    void compat_43_sigmask_to_sigset(const int *, sigset_t *);
    void compat_43_sigset_to_sigmask(const sigset_t *, int *);
    void compat_43_sigvec_to_sigaction(const struct sigvec *, struct sigaction *);
    void compat_43_sigaction_to_sigvec(const struct sigaction *, struct sigvec *);
    void compat_43_sigstack_to_sigaltstack(const struct sigstack *, struct sigaltstack *);
    void compat_43_sigaltstack_to_sigstack(const struct sigaltstack *, struct sigstack *);
    
    void
    compat_43_sigmask_to_sigset(const int *sm, sigset_t *ss)
    {
    
            ss->__bits[0] = *sm;
            ss->__bits[1] = 0;
            ss->__bits[2] = 0;
            ss->__bits[3] = 0;
    }
    
    void
    compat_43_sigset_to_sigmask(const sigset_t *ss, int *sm)
    {
    
            *sm = ss->__bits[0];
    }
    
    void
    compat_43_sigvec_to_sigaction(const struct sigvec *sv, struct sigaction *sa)
    {
            sa->sa_handler = sv->sv_handler;
            compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask);
            sa->sa_flags = sv->sv_flags ^ SA_RESTART;
    }
    
   void
   compat_43_sigaction_to_sigvec(const struct sigaction *sa, struct sigvec *sv)
   {
           sv->sv_handler = sa->sa_handler;
           compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask);
           sv->sv_flags = sa->sa_flags ^ SA_RESTART;
   }
   
   void
   compat_43_sigstack_to_sigaltstack(const struct sigstack *ss, struct sigaltstack *sa)
   {
           sa->ss_sp = ss->ss_sp;
           sa->ss_size = SIGSTKSZ; /* Use the recommended size */
           sa->ss_flags = 0;
           if (ss->ss_onstack)
                   sa->ss_flags |= SS_ONSTACK;
   }
   
   void
   compat_43_sigaltstack_to_sigstack(const struct sigaltstack *sa, struct sigstack *ss)
   {
           ss->ss_sp = sa->ss_sp;
           if (sa->ss_flags & SS_ONSTACK)
                   ss->ss_onstack = 1;
           else
                   ss->ss_onstack = 0;
   }
   
   int
   compat_43_sys_sigblock(struct lwp *l, const struct compat_43_sys_sigblock_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) mask;
           } */
           struct proc *p = l->l_proc;
           int nsm, osm;
           sigset_t nss, oss;
           int error;
   
           nsm = SCARG(uap, mask);
           compat_43_sigmask_to_sigset(&nsm, &nss);
           mutex_enter(p->p_lock);
           error = sigprocmask1(l, SIG_BLOCK, &nss, &oss);
           mutex_exit(p->p_lock);
           if (error)
                   return (error);
           compat_43_sigset_to_sigmask(&oss, &osm);
           *retval = osm;
           return (0);
   }
   
   int
   compat_43_sys_sigsetmask(struct lwp *l, const struct compat_43_sys_sigsetmask_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) mask;
           } */
           struct proc *p = l->l_proc;
           int nsm, osm;
           sigset_t nss, oss;
           int error;
   
           nsm = SCARG(uap, mask);
           compat_43_sigmask_to_sigset(&nsm, &nss);
           mutex_enter(p->p_lock);
           error = sigprocmask1(l, SIG_SETMASK, &nss, &oss);
           mutex_exit(p->p_lock);
           if (error)
                   return (error);
           compat_43_sigset_to_sigmask(&oss, &osm);
           *retval = osm;
           return (0);
   }
   
   /* ARGSUSED */
   int
   compat_43_sys_sigstack(struct lwp *l, const struct compat_43_sys_sigstack_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(struct sigstack *) nss;
                   syscallarg(struct sigstack *) oss;
           } */
           struct sigstack nss, oss;
           struct sigaltstack nsa, osa;
           int error;
   
           if (SCARG(uap, nss)) {
                   error = copyin(SCARG(uap, nss), &nss, sizeof(nss));
                   if (error)
                           return (error);
                   compat_43_sigstack_to_sigaltstack(&nss, &nsa);
           }
           error = sigaltstack1(l,
               SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0);
           if (error)
                   return (error);
           if (SCARG(uap, oss)) {
                   compat_43_sigaltstack_to_sigstack(&osa, &oss);
                   error = copyout(&oss, SCARG(uap, oss), sizeof(oss));
                   if (error)
                           return (error);
           }
           return (0);
   }
   
   /*
    * Generalized interface signal handler, 4.3-compatible.
    */
   /* ARGSUSED */
   int
   compat_43_sys_sigvec(struct lwp *l, const struct compat_43_sys_sigvec_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) signum;
                   syscallarg(const struct sigvec *) nsv;
                   syscallarg(struct sigvec *) osv;
           } */
           struct sigvec nsv, osv;
           struct sigaction nsa, osa;
           int error;
   
           if (SCARG(uap, nsv)) {
                   error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv));
                   if (error)
                           return (error);
                   compat_43_sigvec_to_sigaction(&nsv, &nsa);
           }
           error = sigaction1(l, SCARG(uap, signum),
               SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0,
               NULL, 0);
           if (error)
                   return (error);
           if (SCARG(uap, osv)) {
                   compat_43_sigaction_to_sigvec(&osa, &osv);
                   error = copyout(&osv, SCARG(uap, osv), sizeof(osv));
                   if (error)
                           return (error);
           }
           return (0);
   }
   
   
   /* ARGSUSED */
   int
   compat_43_sys_killpg(struct lwp *l, const struct compat_43_sys_killpg_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) pgid;
                   syscallarg(int) signum;
           } */
           ksiginfo_t ksi;
           int pgid = SCARG(uap, pgid);
   
   #ifdef COMPAT_09
           pgid &= 0xffff;
   #endif
   
           if ((u_int)SCARG(uap, signum) >= NSIG)
                   return (EINVAL);
           memset(&ksi, 0, sizeof(ksi));
           ksi.ksi_signo = SCARG(uap, signum);
           ksi.ksi_code = SI_USER;
           ksi.ksi_pid = l->l_proc->p_pid;
           ksi.ksi_uid = kauth_cred_geteuid(l->l_cred);
           return killpg1(l, &ksi, pgid, 0);
   }

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