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tests/chmod: protect umask with a mutex

`test_chmod_ugoa` and `test_chmod_many_options` both change umask, which
is global state. Since tests run concurrently, this might lead to
a situation where one of the tests changes umask to a value that screws
another test's checks. To prevent this, we introduce a mutex that should
be held by any test that changes umask.

Unfortunately, there's no way to hide umask behind this mutex and
enforce its usage: programmers will have to maintain the discipline
themselves.
This commit is contained in:
Alexander Batischev 2016-12-19 13:02:58 +03:00
parent 60f6f61ac9
commit 655804cff4
4 changed files with 13 additions and 0 deletions

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Cargo.lock generated
View file

@ -35,6 +35,7 @@ dependencies = [
"id 0.0.1",
"install 0.0.1",
"kill 0.0.1",
"lazy_static 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
"link 0.0.1",
"ln 0.0.1",