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, 5 deletions

diff --git a/sysdeps/mach/hurd/getlogin_r.c b/sysdeps/mach/hurd/getlogin_r.c
index 2e43225182..c1a2f14e5e 100644
--- a/sysdeps/mach/hurd/getlogin_r.c
+++ b/sysdeps/mach/hurd/getlogin_r.c
@@ -31,14 +31,11 @@ __getlogin_r (char *name, size_t name_len)
   error_t err;
 
   if (err = __USEPORT (PROC, __proc_getlogin (port, login)))
-    return errno = err;
+    return __hurd_fail (err), err;
 
   size_t len = __strnlen (login, sizeof login - 1) + 1;
   if (len > name_len)
-    {
-      errno = ERANGE;
-      return errno;
-    }
+    return __hurd_fail (ERANGE), ERANGE;
 
   memcpy (name, login, len);
   return 0;