VM_MAP_INHERIT(9)

💖 VM_MAP_INHERIT(9) 💖

okay so bestie, welcome to VM_MAP_INHERIT(9) — yep, the Kernel Developer's Manual page, and it's literally about setting fork inheritance flags for a range inside a map. Very main-character kernel energy. 🫶

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✨ NAME ✨

vm_map_inherit — set fork inheritance flags for a range within a map. no cap, that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_map.h>

int
vm_map_inherit(vm_map_t map, vm_offset_t start, vm_offset_t end,
    vm_inherit_t new_inheritance);

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🦋 DESCRIPTION 🦋

so the vm_map_inherit() function sets the inheritance flags for the range from start to end within the target map to the value new_inheritance. that's it, that's the assignment. 💖

the new_inheritance flag has to be one of these three icons 👑:

• VM_INHERIT_NONE
• VM_INHERIT_COPY
• VM_INHERIT_SHARE

and this is what affects how the map will be shared with child maps when the associated process forks. yes, fork(2) behavior, we're in it. 🔥

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🎀 IMPLEMENTATION NOTES 🎀

the vm_map_inherit() function obtains a lock on the map using vm_map_lock(9) for the duration of the function. she locks in, literally. 🔒✨

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🌈 RETURN VALUES 🌈

vm_map_inherit() returns KERN_SUCCESS if the inheritance flags could be set. slay. ✅

otherwise, if the provided flags were invalid, KERN_INVALID_ARGUMENT will be returned. not slay, but important. 💀

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🧚 SEE ALSO 🧚

• fork(2)

iykyk, go read that one too. 🍓

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💜 AUTHORS 💜

this manual page was written by Bruce M Simpson <bms@spc.org>. iconic behavior, honestly. 👑

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and that's the whole page, bestie. source/version: Debian. date: July 19, 2003. mwah, kisses from the manual footer 💋💖