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
freebsd_sys_rfork(struct lwp * l,const struct freebsd_sys_rfork_args * uap,register_t * retval)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