Rollup merge of #151072 - fix-pidfd-ioctl, r=jhpratt

also handle ENOTTY ioctl errors when checking pidfd -> pid support

Otherwise the std testsuite fails on older kernels.

Reported in #150412 (comment)

Author: JonathanBrouwer

library/std/src/sys/pal/unix/linux/pidfd.rs

@@ -33,7 +33,7 @@ impl PidFd {
         match cvt(unsafe { libc::ioctl(self.0.as_raw_fd(), libc::PIDFD_GET_INFO, &mut pidfd_info) })
         {
             Ok(_) => {}
-            Err(e) if e.raw_os_error() == Some(libc::EINVAL) => {
+            Err(e) if matches!(e.raw_os_error(), Some(libc::EINVAL | libc::ENOTTY)) => {
                 // kernel doesn't support that ioctl, try the glibc helper that looks at procfs
                 weak!(
                     fn pidfd_getpid(pidfd: RawFd) -> libc::pid_t;

library/std/src/sys/pal/unix/linux/pidfd/tests.rs

@@ -1,6 +1,5 @@
 use super::PidFd as InternalPidFd;
 use crate::assert_matches::assert_matches;
-use crate::io::ErrorKind;
 use crate::os::fd::AsRawFd;
 use crate::os::linux::process::{ChildExt, CommandExt as _};
 use crate::os::unix::process::{CommandExt as _, ExitStatusExt};
@@ -62,7 +61,9 @@ fn test_command_pidfd() {
     if let Ok(pidfd) = child.pidfd() {
         match pidfd.as_inner().pid() {
             Ok(pid) => assert_eq!(pid, id),
-            Err(e) if e.kind() == ErrorKind::InvalidInput => { /* older kernel */ }
+            Err(e) if matches!(e.raw_os_error(), Some(libc::EINVAL | libc::ENOTTY)) => {
+                /* older kernel */
+            }
             Err(e) => panic!("unexpected error getting pid from pidfd: {}", e),
         }
     }