From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Mon, 23 Aug 2021 17:06:49 +0000 (+0200)
Subject: hurd: Fix errlist error mapping
X-Git-Tag: glibc-2.35~564
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5eb3e2c794c3fdd553833af5342740051221479c;p=thirdparty%2Fglibc.git

hurd: Fix errlist error mapping

On the Hurd, the errno values don't start at 0, so _sys_errlist_internal
needs index remapping. The _sys_errlist_internal definition already properly
uses ERR_MAP, but __get_errlist and __get_errname were not.
---

diff --git a/stdio-common/errlist.c b/stdio-common/errlist.c
index 928e966b589..d6f667e1aba 100644
--- a/stdio-common/errlist.c
+++ b/stdio-common/errlist.c
@@ -34,8 +34,9 @@ const char *const _sys_errlist_internal[] =
 const char *
 __get_errlist (int errnum)
 {
-  if (errnum >= 0 && errnum < array_length (_sys_errlist_internal))
-    return _sys_errlist_internal[errnum];
+  int mapped = ERR_MAP (errnum);
+  if (mapped >= 0 && mapped < array_length (_sys_errlist_internal))
+    return _sys_errlist_internal[mapped];
   return NULL;
 }
 
@@ -67,10 +68,11 @@ static const unsigned short _sys_errnameidx[] =
 const char *
 __get_errname (int errnum)
 {
-  if (errnum < 0 || errnum >= array_length (_sys_errnameidx)
-      || (errnum > 0 && _sys_errnameidx[errnum] == 0))
+  int mapped = ERR_MAP (errnum);
+  if (mapped < 0 || mapped >= array_length (_sys_errnameidx)
+      || (mapped > 0 && _sys_errnameidx[mapped] == 0))
     return NULL;
-  return _sys_errname.str + _sys_errnameidx[errnum];
+  return _sys_errname.str + _sys_errnameidx[mapped];
 }
 
 #include <errlist-compat.c>