Auto merge of rust-lang#128962 - devnexen:fs_get_mode_haiku, r=workingjubilee

std::fs: get_mode implementation for all unix

Author: bors

Diff for: std/src/sys/pal/unix/fs.rs

@@ -1552,17 +1552,6 @@ impl fmt::Debug for File {
             None
         }
 
-        #[cfg(any(
-            target_os = "linux",
-            target_os = "freebsd",
-            target_os = "hurd",
-            target_os = "netbsd",
-            target_os = "openbsd",
-            target_os = "vxworks",
-            target_os = "solaris",
-            target_os = "illumos",
-            target_vendor = "apple",
-        ))]
         fn get_mode(fd: c_int) -> Option<(bool, bool)> {
             let mode = unsafe { libc::fcntl(fd, libc::F_GETFL) };
             if mode == -1 {
@@ -1576,22 +1565,6 @@ impl fmt::Debug for File {
             }
         }
 
-        #[cfg(not(any(
-            target_os = "linux",
-            target_os = "freebsd",
-            target_os = "hurd",
-            target_os = "netbsd",
-            target_os = "openbsd",
-            target_os = "vxworks",
-            target_os = "solaris",
-            target_os = "illumos",
-            target_vendor = "apple",
-        )))]
-        fn get_mode(_fd: c_int) -> Option<(bool, bool)> {
-            // FIXME(#24570): implement this for other Unix platforms
-            None
-        }
-
         let fd = self.as_raw_fd();
         let mut b = f.debug_struct("File");
         b.field("fd", &fd);