execve called from non main thread result in error.

[Anarchos]

I encounter this one while using the ocaml package manager to install some package:

strace -a ~/.opam/4.14.2+trunk/bin/dune exec -p lwt src/unix/config/discover.exe -- --save --use-libev true

==> [ 82079] exec = 0x8000000f Operation not allowed (22 us) Error: execve(./_build/default/src/unix/config/discover.exe): Operation not allowed

It seems exec_team() is called from non main thread.

I tried to submit a patch to that effect ​https://review.haiku-os.org/c/haiku/+/7105, but after discussion with waddlesplash, the best solution would be to change the main thread , and not steal its id. This is way before my head.

[korli]

Linux does the following: the main (leader) thread is terminated, and the non-main thread assumes its identity: ​https://elixir.bootlin.com/linux/v6.6/source/fs/exec.c#L1081

[Anarchos]

Can be closed as invalid.

[pulkomandy]

Wether this is really needed or not by an application, POSIX does not disallow to call execve from a thread, so we should implement it

[Anarchos]

Source code involved : ​https://github.com/haiku/haiku/blob/master/src/system/kernel/team.cpp#L1988