Home | History | Annotate | Line # | Download | only in freebsd
freebsd_fork.c revision 1.9 
      1 /*	$NetBSD: freebsd_fork.c,v 1.9 2018/04/16 14:51:59 kamil 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 1.9 2018/04/16 14:51:59 kamil 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 <compat/freebsd/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));
     85 }
     86