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, 3 insertions, 9 deletions

diff --git a/sysdeps/mach/hurd/getgid.c b/sysdeps/mach/hurd/getgid.c
index f49e592f79..62183074ea 100644
--- a/sysdeps/mach/hurd/getgid.c
+++ b/sysdeps/mach/hurd/getgid.c
@@ -32,18 +32,12 @@ retry:
   __mutex_lock (&_hurd_id.lock);
 
   if (err = _hurd_check_ids ())
-    {
-      errno = err;
-      gid = -1;
-    }
+    gid = __hurd_fail (err);
   else if (_hurd_id.aux.ngids >= 1)
     gid = _hurd_id.aux.gids[0];
   else
-    {
-      /* We do not even have a real gid.  */
-      errno = EGRATUITOUS;
-      gid = -1;
-    }
+    /* We do not even have a real gid.  */
+    gid = __hurd_fail (EGRATUITOUS);
 
   __mutex_unlock (&_hurd_id.lock);
   HURD_CRITICAL_END;