1.\" 2.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd July 19, 2003 29.Dt vm_map_inherit 9 30.Sh NAME 31.Nm vm_map_inherit 32.Nd set fork inheritance flags for a range within a map 33.Sh SYNOPSIS 34.In sys/param.h 35.In vm/vm.h 36.In vm/vm_map.h 37.Ft int 38.Fn vm_map_inherit "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_inherit_t new_inheritance" 39.Sh DESCRIPTION 40The 41.Fn vm_map_inherit 42function sets the inheritance flags for the range 43.Fa start 44to 45.Fa end 46within the target 47.Fa map 48to the value 49.Fa new_inheritance . 50.Pp 51The 52.Fa new_inheritance 53flag must have one of the values 54.Dv VM_INHERIT_NONE , 55.Dv VM_INHERIT_COPY , 56or 57.Dv VM_INHERIT_SHARE . 58This affects how the map will be shared with child maps when the 59associated process forks. 60.Sh IMPLEMENTATION NOTES 61The 62.Fn 63function obtains a lock on the 64.Fa map 65using 66.Xr vm_map_lock 9 67for the duration of the function. 68.Sh RETURN VALUES 69The 70.Fn vm_map_inherit 71function returns 72.Dv KERN_SUCCESS 73if the inheritance flags could be set. 74Otherwise, if the provided flags were invalid, 75.Dv KERN_INVALID_ARGUMENT 76will be returned. 77.Sh SEE ALSO 78.Xr fork 2 79.Sh AUTHORS 80This man page was written by 81.An Bruce M Simpson Aq bms@spc.org . 82