Is there a generic way for a program to detect that is it being run
inside the linux-user emulation?

The purpose for that would be to work around limitations of the
emulation, like CLONE_VFORK being unsupported.  For example, python >=
3.13 needs to avoid using posix_spawn in that case, because the
emulation of CLONE_VFORK as a true fork makes it impossible for it to
report errors back to the parent process.

-- 
Andreas Schwab, SUSE Labs, sch...@suse.de
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