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feat(unstable): allow specifing gid and uid for subprocess #11586
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3cee3c5
impl
crowlKats 5342bdc
fix
crowlKats 21b37b5
add test
crowlKats f8762ad
Merge branch 'main' into set_gid/uid
crowlKats 354a713
Merge branch 'main' into set_gid/uid
bartlomieju 03a33ff
add pre_exec hook and update docs
crowlKats cd1ef49
fmt and lint
bartlomieju 8cef2d8
Merge branch 'main' into set_gid/uid
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I don't think it's going to be clear to most users what this means. Can I suggest copying the description from libstd's
CommandExt
?And:
I'd argue changing uid/gid without being able to drop group membership is insecure (a mistake I made in libuv) but
.groups()
is experimental in libstd and tokio doesn't support it at all.There was a problem hiding this comment.
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@crowlKats please update doc with Ben's suggestion.
I'd argue changing uid/gid without being able to drop group membership is insecure (a mistake I made in libuv) but .groups() is experimental in libstd and tokio doesn't support it at all.
@bnoordhuis what would you suggest in this case?
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Either hold off on merging until Tokio grows the right APIs or add a really big warning to the documentation.
The problem with a warning is that it's not actionable. There's no way to detect an insecure situation and act on it.
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Thanks, as you point out the second option is not actionable. Let's hold off merging, and open an feature request to
tokio
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I looked at how libstd implements
Command::spawn()
(which tokio wraps) and it callssetgroups(0, null())
to drop group membership (barring bug rust-lang/rust#88716) so, on second thought, this is probably good to merge.If you wanted to be extra secure, you could add a Unix-ony
pre_exec
hook that callssetgroups(0, null())
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@crowlKats could you add that call to
pre_exec
that Ben pointed out?There was a problem hiding this comment.
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@bartlomieju done