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.Os 31.Sh NAME 32.Nm vm_map_inherit 33.Nd set fork inheritance flags for a range within a map 34.Sh SYNOPSIS 35.In sys/param.h 36.In vm/vm.h 37.In vm/vm_map.h 38.Ft int 39.Fo vm_map_inherit 40.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" 41.Fa "vm_inherit_t new_inheritance" 42.Fc 43.Sh DESCRIPTION 44The 45.Fn vm_map_inherit 46function sets the inheritance flags for the range 47.Fa start 48to 49.Fa end 50within the target 51.Fa map 52to the value 53.Fa new_inheritance . 54.Pp 55The 56.Fa new_inheritance 57flag must have one of the values 58.Dv VM_INHERIT_NONE , 59.Dv VM_INHERIT_COPY , 60or 61.Dv VM_INHERIT_SHARE . 62This affects how the map will be shared with child maps when the 63associated process forks. 64.Sh IMPLEMENTATION NOTES 65The 66.Fn vm_map_inherit 67function obtains a lock on the 68.Fa map 69using 70.Xr vm_map_lock 9 71for the duration of the function. 72.Sh RETURN VALUES 73The 74.Fn vm_map_inherit 75function returns 76.Dv KERN_SUCCESS 77if the inheritance flags could be set. 78Otherwise, if the provided flags were invalid, 79.Dv KERN_INVALID_ARGUMENT 80will be returned. 81.Sh SEE ALSO 82.Xr fork 2 83.Sh AUTHORS 84This manual page was written by 85.An Bruce M Simpson Aq Mt bms@spc.org . 86