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utmpx: silence musl warnings

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Fixes https://github.com/uutils/coreutils/issues/7865

We are intentionally calling the stub utmpx functions of musl, in order
to achieve behavior parity with GNU coreutils, and in order to be able
to ship those utilities for musl libc. Silence those warnings.

See also https://github.com/uutils/coreutils/issues/1361 for details.

Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com>
This commit is contained in:
Etienne Cordonnier 2025-05-28 11:54:03 +02:00
parent 0f632f2fba
commit c14282209d
1 changed files with 13 additions and 0 deletions
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13
src/uucore/src/lib/features/utmpx.rs
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@ -40,11 +40,19 @@ use std::ptr;
use std::sync::{Mutex, MutexGuard};
pub use self::ut::*;
// See the FAQ at https://wiki.musl-libc.org/faq#Q:-Why-is-the-utmp/wtmp-functionality-only-implemented-as-stubs?
// Musl implements only stubs for the utmp functions, and the libc crate issues a deprecation warning about this.
// However, calling these stubs is the correct approach to maintain consistent behavior with GNU coreutils.
#[cfg_attr(target_env = "musl", allow(deprecated))]
pub use libc::endutxent;
#[cfg_attr(target_env = "musl", allow(deprecated))]
pub use libc::getutxent;
#[cfg_attr(target_env = "musl", allow(deprecated))]
pub use libc::setutxent;
use libc::utmpx;
#[cfg(any(target_vendor = "apple", target_os = "linux", target_os = "netbsd"))]
#[cfg_attr(target_env = "musl", allow(deprecated))]
pub use libc::utmpxname;
/// # Safety
@ -278,6 +286,7 @@ impl Utmpx {
// This can technically fail, and it would be nice to detect that,
// but it doesn't return anything so we'd have to do nasty things
// with errno.
#[cfg_attr(target_env = "musl", allow(deprecated))]
setutxent();
}
iter
@ -302,7 +311,9 @@ impl Utmpx {
// is specified, no warning or anything.
// So this function is pretty crazy and we don't try to detect errors.
// Not much we can do besides pray.
#[cfg_attr(target_env = "musl", allow(deprecated))]
utmpxname(path.as_ptr());
#[cfg_attr(target_env = "musl", allow(deprecated))]
setutxent();
}
iter
@ -342,6 +353,7 @@ impl Iterator for UtmpxIter {
type Item = Utmpx;
fn next(&mut self) -> Option<Self::Item> {
unsafe {
#[cfg_attr(target_env = "musl", allow(deprecated))]
let res = getutxent();
if res.is_null() {
None
@ -361,6 +373,7 @@ impl Iterator for UtmpxIter {
impl Drop for UtmpxIter {
fn drop(&mut self) {
unsafe {
#[cfg_attr(target_env = "musl", allow(deprecated))]
endutxent();
}
}