diff options
Diffstat (limited to 'library/std/src')
| -rw-r--r-- | library/std/src/os/unix/fs.rs | 5 | ||||
| -rw-r--r-- | library/std/src/sys/cmath.rs | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/library/std/src/os/unix/fs.rs b/library/std/src/os/unix/fs.rs index ba6481f052c..04a45fd035a 100644 --- a/library/std/src/os/unix/fs.rs +++ b/library/std/src/os/unix/fs.rs @@ -987,6 +987,11 @@ impl DirBuilderExt for fs::DirBuilder { /// Changing the group typically requires either being the owner and a member of the group, or /// having privileges. /// +/// Be aware that changing owner clears the `suid` and `sgid` permission bits in most cases +/// according to POSIX, usually even if the user is root. The sgid is not cleared when +/// the file is non-group-executable. See: <https://www.man7.org/linux/man-pages/man2/chown.2.html> +/// This call may also clear file capabilities, if there was any. +/// /// If called on a symbolic link, this will change the owner and group of the link target. To /// change the owner and group of the link itself, see [`lchown`]. /// diff --git a/library/std/src/sys/cmath.rs b/library/std/src/sys/cmath.rs index 2997e908fa1..ee36127cfdf 100644 --- a/library/std/src/sys/cmath.rs +++ b/library/std/src/sys/cmath.rs @@ -26,6 +26,7 @@ extern "C" { pub fn tgamma(n: f64) -> f64; pub fn tgammaf(n: f32) -> f32; pub fn lgamma_r(n: f64, s: &mut i32) -> f64; + #[cfg(not(target_os = "aix"))] pub fn lgammaf_r(n: f32, s: &mut i32) -> f32; pub fn acosf128(n: f128) -> f128; @@ -56,6 +57,13 @@ extern "C" { }} } +// On AIX, we don't have lgammaf_r only the f64 version, so we can +// use the f64 version lgamma_r +#[cfg(target_os = "aix")] +pub unsafe fn lgammaf_r(n: f32, s: &mut i32) -> f32 { + lgamma_r(n.into(), s) as f32 +} + // On 32-bit x86 MSVC these functions aren't defined, so we just define shims // which promote everything to f64, perform the calculation, and then demote // back to f32. While not precisely correct should be "correct enough" for now. |