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You are right. POSIX specifies one thing, the standard library in Rust and some other libraries specifies something different. 'Safe to use unless there are oth

You are right. POSIX specifies one thing, the standard library in Rust and some other libraries specifies something different. 'Safe to use unless there are other threads' is not really something you can or want to encode in a type system. But libraries and users are caught in the middle.

eptcyka 3y ago
It is safe to use the Rust standard library interface.
- pitdicker 3y ago
  Unless the environment is also touched by a part of the program written in Go, Julia, I don't know... The lock is not shared across languages.
  - the_mitsuhiko 3y ago
    > The lock is not shared across languages. Which just to be clear: it cannot without changing the standard. There is really nothing anyone can do without a change in the standard.
  - bbatha 3y ago
    However, to access any of those languages from rust you need to use unsafe.
    - eptcyka 3y ago
      There is no safe way to access the environment, even if you mark this API unsafe, what are you going to do?
      - bbatha 3y ago
        You can safely access the environment so long as you use the rust apis and don't have unsafe code that calls `setenv` without synchronization.