#13446: POSIX: add posix_spawnp(), posix_spawn()
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Reporter: korli | Owner: nobody
Type: enhancement | Status: closed
Priority: normal | Milestone: Unscheduled
Component: System/POSIX | Version: R1/Development
Resolution: fixed | Keywords:
Blocked By: | Blocking:
Has a Patch: 1 | Platform: All
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Comment (by pulkomandy):
The idea in Linux is to implement fork with copy-on-write, so no need to
actually copy any of the data when forking (just the memory mapping needs
to be copied and made read-only). However this would conflict with our
"don't overcommit memory" management.
So, a vfork-style syscall to be used inside posix_spawn may be useful. But
it seems one can get in a lot of trouble when multiple threads are
involved, for example (in principle, vfork should block all of them in the
parent until the child is done with its exec or exit). This is why making
fork() as quick as possible may actually be a better idea.
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Ticket URL: <https://dev.haiku-os.org/ticket/13446#comment:7>
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