1 files changed, 67 insertions, 0 deletions
diff --git a/localedata/tst-locale-loadlocale.c b/localedata/tst-locale-loadlocale.c
new file mode 100644
index 0000000000..64796e975d
--- /dev/null
+++ b/localedata/tst-locale-loadlocale.c
@@ -0,0 +1,67 @@
+/* Test for locale loading error handling (Bug 14247)
+   Copyright (C) 2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <errno.h>
+#include <locale.h>
+#include <support/check.h>
+#include <support/support.h>
+
+static int
+do_test (void)
+{
+  locale_t loc = NULL;
+
+  /* We must load an en_US-based locale for the final test to fail.
+     The locale loading code will find the en_US locale already loaded
+     but the codesets won't match.  */
+  xsetlocale (LC_ALL, "en_US.UTF-8");
+
+  /* Call newlocale with an invalid locale.  We expect the test system
+     does not have "invalidlocale" locale.  */
+  errno = 0;
+  loc = newlocale (LC_COLLATE_MASK | LC_CTYPE_MASK, "invalidlocale.utf8", 0);
+  TEST_VERIFY (loc == NULL && errno != 0);
+
+  /* Call newlocale again with the same name. This triggers bug 14247 where
+     the second call fails to set errno correctly.  */
+  errno = 0;
+  loc = newlocale (LC_COLLATE_MASK | LC_CTYPE_MASK, "invalidlocale.utf8", 0);
+  TEST_VERIFY (loc == NULL && errno != 0);
+
+  /* Next we attempt to load a locale that exists but whose codeset
+     does not match the codeset of the locale on the system.
+     This is more difficult to test but we rely on the fact that locale
+     processing will normalize the locale name and attempt to open
+     "en_US" with no codeset as a fallback and this will allow us to
+     compare a loaded "en_US" locale with a UTF-8 codeset to the
+     ficiticious "en_US.utf99" and get a codeset match failure.  */
+  errno = 0;
+  loc = newlocale (LC_COLLATE_MASK | LC_CTYPE_MASK, "en_US.utf99", 0);
+  TEST_VERIFY (loc == NULL && errno != 0);
+
+  /* Call newlocale again with the same name. This triggers bug 14247 where
+     the second call fails to set errno correctly.  */
+  errno = 0;
+  loc = newlocale (LC_COLLATE_MASK | LC_CTYPE_MASK, "en_US.utf99", 0);
+  TEST_VERIFY (loc == NULL && errno != 0);
+
+  return 0;
+}
+
+#include <support/test-driver.c>