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std: don't reference libc::O_NOFOLLOW on VxWorks in set_perm_nofollow #162065

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Merged
rust-bors merged 1 commit into from
Sep 3, 2026
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std: don't reference libc::O_NOFOLLOW on VxWorks in set_perm_nofollow #162065

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9 changes: 8 additions & 1 deletion library/std/src/sys/fs/unix.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1884,6 +1884,13 @@ pub fn set_perm(p: &CStr, perm: FilePermissions) -> io::Result<()> {
cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) }).map(|_| ())
}

#[cfg(target_os = "vxworks")]
pub fn set_perm_nofollow(_p: &CStr, _perm: FilePermissions) -> io::Result<()> {
// VxWorks has no `O_NOFOLLOW`, and its `fchmodat` rejects
// `AT_SYMLINK_NOFOLLOW` with `ENOTSUP`, so a no-follow chmod is unsupported.
Err(crate::io::ErrorKind::Unsupported.into())
}

#[cfg(target_os = "android")]
pub fn set_perm_nofollow(_p: &CStr, _perm: FilePermissions) -> io::Result<()> {
// Currently Android seems to be having inconsistent behavior with fchmodat
Expand All @@ -1896,7 +1903,7 @@ pub fn set_perm_nofollow(_p: &CStr, _perm: FilePermissions) -> io::Result<()> {
Err(crate::io::ErrorKind::Unsupported.into())
}

#[cfg(not(target_os = "android"))]
#[cfg(not(any(target_os = "android", target_os = "vxworks")))]
pub fn set_perm_nofollow(p: &CStr, perm: FilePermissions) -> io::Result<()> {
#[inline]
/// Helper function for fallback open with `O_NOFOLLOW` + `fchmod` behavior
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