Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/freebsd/freebsd_fork.c
Version:
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1 /* $NetBSD: freebsd_fork.c,v 1.7 2008/04/28 20:23:41 martin 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 1.7 2008/04/28 20:23:41 martin 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 }
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