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.Dd July 19, 2003 27.Dt VM_MAP_INHERIT 9 28.Os 29.Sh NAME 30.Nm vm_map_inherit 31.Nd set fork inheritance flags for a range within a map 32.Sh SYNOPSIS 33.In sys/param.h 34.In vm/vm.h 35.In vm/vm_map.h 36.Ft int 37.Fo vm_map_inherit 38.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" 39.Fa "vm_inherit_t new_inheritance" 40.Fc 41.Sh DESCRIPTION 42The 43.Fn vm_map_inherit 44function sets the inheritance flags for the range 45.Fa start 46to 47.Fa end 48within the target 49.Fa map 50to the value 51.Fa new_inheritance . 52.Pp 53The 54.Fa new_inheritance 55flag must have one of the values 56.Dv VM_INHERIT_NONE , 57.Dv VM_INHERIT_COPY , 58or 59.Dv VM_INHERIT_SHARE . 60This affects how the map will be shared with child maps when the 61associated process forks. 62.Sh IMPLEMENTATION NOTES 63The 64.Fn vm_map_inherit 65function obtains a lock on the 66.Fa map 67using 68.Xr vm_map_lock 9 69for the duration of the function. 70.Sh RETURN VALUES 71The 72.Fn vm_map_inherit 73function returns 74.Dv KERN_SUCCESS 75if the inheritance flags could be set. 76Otherwise, if the provided flags were invalid, 77.Dv KERN_INVALID_ARGUMENT 78will be returned. 79.Sh SEE ALSO 80.Xr fork 2 81.Sh AUTHORS 82This manual page was written by 83.An Bruce M Simpson Aq Mt bms@spc.org . 84