sys/compat/freebsd/freebsd_fork.c

   1 /*      $NetBSD: freebsd_fork.c,v 1.6 2007/12/20 23:02:47 dsl Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD: freebsd_fork.c,v 1.6 2007/12/20 23:02:47 dsl Exp $");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/proc.h>
  35 #include <sys/errno.h>
  36 #include <sys/uio.h>
  37 #include <sys/signal.h>
  38 #include <sys/mount.h>
  39 #include <sys/syscallargs.h>
  40
  41 #include <compat/sys/signal.h>
  42 #include <compat/sys/signalvar.h>
  43
  44 #include <compat/freebsd/freebsd_syscallargs.h>
  45 #include <compat/freebsd/freebsd_fork.h>
  46
  47 #include <machine/freebsd_machdep.h>
  48
  49 /*
  50  * rfork()
  51  */
  52 int
  53 freebsd_sys_rfork(struct lwp *l, const struct freebsd_sys_rfork_args *uap, register_t *retval)
  54 {
  55         /* {
  56                 syscallargs(int) flags;
  57         } */
  58         int flags;
  59
  60         flags = 0;
  61
  62         if ((SCARG(uap, flags)
  63             & (FREEBSD_RFFDG | FREEBSD_RFCFDG))
  64             == (FREEBSD_RFFDG | FREEBSD_RFCFDG))
  65                 return (EINVAL);
  66
  67         if ((SCARG(uap, flags) & FREEBSD_RFPROC) == 0)
  68                 return (EINVAL);
  69
  70         if (SCARG(uap, flags) & FREEBSD_RFNOWAIT)
  71                 flags |= FORK_NOWAIT;
  72         if (SCARG(uap, flags) & FREEBSD_RFMEM)
  73                 flags |= FORK_SHAREVM;
  74         if (SCARG(uap, flags) & FREEBSD_RFSIGSHARE)
  75                 flags |= FORK_SHARESIGS;
  76
  77         if (SCARG(uap, flags) & FREEBSD_RFCFDG)
  78                 flags |= FORK_CLEANFILES;
  79         else if ((SCARG(uap, flags) & FREEBSD_RFFDG) == 0)
  80                 flags |= FORK_SHAREFILES;
  81
  82         return (fork1(l, flags,
  83             SCARG(uap, flags) & FREEBSD_RFLINUXTHPN ? SIGUSR1 : SIGCHLD,
  84             NULL, 0, NULL, NULL, retval, NULL));
  85 }