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std: use arc4random_buf from libc #159597

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Merged
rust-bors merged 1 commit into from
Jul 20, 2026
Merged

std: use arc4random_buf from libc #159597

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17 changes: 3 additions & 14 deletions library/std/src/sys/random/arc4random.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,22 +9,11 @@
//! wrapper for `getrandom`. Since we need to hook into `getrandom` directly for
//! `HashMap` keys anyway, we just keep our version).

#[cfg(not(any(
target_os = "haiku",
target_os = "illumos",
target_os = "solaris",
target_os = "vita",
)))]
#[cfg(not(target_os = "vita"))]
use libc::arc4random_buf;

// FIXME: move these to libc (except Haiku, that one needs to link to libbsd.so).
#[cfg(any(
target_os = "haiku", // See https://git.haiku-os.org/haiku/tree/headers/compatibility/bsd/stdlib.h
target_os = "illumos", // See https://www.illumos.org/man/3C/arc4random
target_os = "solaris", // See https://docs.oracle.com/cd/E88353_01/html/E37843/arc4random-3c.html
target_os = "vita", // See https://github.com/vitasdk/newlib/blob/b89e5bc183b516945f9ee07eef483ecb916e45ff/newlib/libc/include/stdlib.h#L74
))]
#[cfg_attr(target_os = "haiku", link(name = "bsd"))]
// FIXME: move this to libc
#[cfg(target_os = "vita")] // See https://github.com/vitasdk/newlib/blob/b89e5bc183b516945f9ee07eef483ecb916e45ff/newlib/libc/include/stdlib.h#L74
unsafe extern "C" {
fn arc4random_buf(buf: *mut core::ffi::c_void, nbytes: libc::size_t);
}
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