vm_map_inherit (9)

Leading comments

Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
All rights reserved.

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(The comments found at the beginning of the groff file "man9/vm_map_inherit.9freebsd".)

NAME

vm_map_inherit - set fork inheritance flags for a range within a map

SYNOPSIS

In sys/param.h In vm/vm.h In vm/vm_map.h Ft int Fo vm_map_inherit Fa vm_map_t map vm_offset_t start vm_offset_t end Fa vm_inherit_t new_inheritance Fc

DESCRIPTION

The Fn vm_map_inherit function sets the inheritance flags for the range Fa start to Fa end within the target Fa map to the value Fa new_inheritance .

The Fa new_inheritance flag must have one of the values VM_INHERIT_NONE VM_INHERIT_COPY or VM_INHERIT_SHARE This affects how the map will be shared with child maps when the associated process forks.

IMPLEMENTATION NOTES

The Fn vm_map_inherit function obtains a lock on the Fa map using vm_map_lock9 for the duration of the function.

RETURN VALUES

The Fn vm_map_inherit function returns KERN_SUCCESS if the inheritance flags could be set. Otherwise, if the provided flags were invalid, KERN_INVALID_ARGUMENT will be returned.

SEE ALSO

fork(2)

AUTHORS

This manual page was written by An Bruce M Simpson Aq bms@spc.org .