# Synchronized FFI access to POSIX environment variable functions

**URL:** <https://internals.rust-lang.org/t/synchronized-ffi-access-to-posix-environment-variable-functions/15475>\
**Category:** Unsafe Code Guidelines\
**Created:** [October 21, 2021, 2:35pm UTC](https://internals.rust-lang.org/t/synchronized-ffi-access-to-posix-environment-variable-functions/15475 "2021-10-21T14:35:49Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![jhpratt](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/jhpratt/32/11640_2.png) [@jhpratt](https://internals.rust-lang.org/u/jhpratt)\
**Post date:** [October 21, 2021, 4:00pm UTC](https://internals.rust-lang.org/t/synchronized-ffi-access-to-posix-environment-variable-functions/15475/4 "2021-10-21T16:00:23Z")

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Previous: [Function to hold lock on execution environment (for FFI)](https://internals.rust-lang.org/t/function-to-hold-lock-on-execution-environment-for-ffi/13702)

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