diff options
| -rw-r--r-- | library/std/src/lib.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs index 35ada678740..ad005833ad5 100644 --- a/library/std/src/lib.rs +++ b/library/std/src/lib.rs @@ -174,7 +174,9 @@ //! //! - after-main use of thread-locals, which also affects additional features: //! - [`thread::current()`] -//! - before-main stdio file descriptors are not guaranteed to be open on unix platforms +//! - under UNIX, before main, file descriptors 0, 1, and 2 may be unchanged +//! (they are guaranteed to be open during main, +//! and are opened to /dev/null O_RDWR if they weren't open on program start) //! //! //! [I/O]: io |