hurd: Use __hurd_fail () instead of assigning errno

The __hurd_fail () inline function is the dedicated, idiomatic way of
reporting errors in the Hurd part of glibc. Not only is it more concise
than '{ errno = err; return -1; }', it is since commit
6639cc10029e24e06b34e169712b21c31b8cf213
"hurd: Mark error functions as __COLD" marked with the cold attribute,
telling the compiler that this codepath is unlikely to be executed.

In one case, use __hurd_dfail () over the plain __hurd_fail ().

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-1-bugaevc@gmail.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/sysdeps/mach/hurd/dirfd.c b/sysdeps/mach/hurd/dirfd.c
index 9520f3ef89..2cf02c787a 100644
--- a/sysdeps/mach/hurd/dirfd.c
+++ b/sysdeps/mach/hurd/dirfd.c
@@ -18,6 +18,7 @@
 
 #include <dirent.h>
 #include <dirstream.h>
+#include <hurd.h>
 #include <hurd/fd.h>
 #include <errno.h>
 
@@ -32,10 +33,7 @@ __dirfd (DIR *dirp)
     if (_hurd_dtable[fd] == dirp->__fd)
       break;
   if (fd == _hurd_dtablesize)
-    {
-      errno = EINVAL;
-      fd = -1;
-    }
+    fd = __hurd_fail (EINVAL);
   __mutex_unlock (&_hurd_dtable_lock);
   HURD_CRITICAL_END;