string: Add strerror, strerror_r, and strerror_l test

Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu,
and s390x-linux-gnu.

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

2 files changed, 78 insertions, 1 deletions

diff --git a/string/Makefile b/string/Makefile
index 5b67808..2725c86 100644
--- a/string/Makefile
+++ b/string/Makefile
@@ -61,7 +61,7 @@ tests		:= tester inl-tester noinl-tester testcopy test-ffs	\
 		   tst-strtok_r bug-strcoll2 tst-cmp tst-xbzero-opt	\
 		   test-endian-types test-endian-file-scope		\
 		   test-endian-sign-conversion tst-memmove-overflow	\
-		   tst-strsignal
+		   tst-strsignal tst-strerror
 
 # This test allocates a lot of memory and can run for a long time.
 xtests = tst-strcoll-overflow
@@ -117,5 +117,6 @@ $(objpfx)tst-strxfrm2.out: $(gen-locales)
 $(objpfx)bug-strcoll2.out: $(gen-locales)
 $(objpfx)tst-strcoll-overflow.out: $(gen-locales)
 $(objpfx)tst-strsignal.out: $(gen-locales)
+$(objpfx)tst-strerror.out: $(gen-locales)
 
 endif
diff --git a/string/tst-strerror.c b/string/tst-strerror.c
new file mode 100644
index 0000000..3af5123
--- /dev/null
+++ b/string/tst-strerror.c
@@ -0,0 +1,76 @@
+/* Test for strerror, strerror_r, and strerror_l.
+
+   Copyright (C) 2020 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 <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <locale.h>
+#include <array_length.h>
+
+#include <support/support.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  xsetlocale (LC_ALL, "C");
+
+  TEST_COMPARE_STRING (strerror (EINVAL), "Invalid argument");
+  TEST_COMPARE_STRING (strerror (-1),     "Unknown error -1");
+
+  {
+    char buffer[32];
+    TEST_COMPARE_STRING (strerror_r (EINVAL, buffer, 8),
+			 "Invalid argument");
+    TEST_COMPARE_STRING (strerror_r (-1, buffer, 8),
+			 "Unknown");
+    TEST_COMPARE_STRING (strerror_r (-1, buffer, 16),
+			 "Unknown error -");
+    TEST_COMPARE_STRING (strerror_r (-1, buffer, 32),
+			 "Unknown error -1");
+  }
+
+  locale_t l = xnewlocale (LC_ALL_MASK, "pt_BR.UTF-8", NULL);
+
+  TEST_COMPARE_STRING (strerror_l (EINVAL, l), "Argumento inv\303\241lido");
+  TEST_COMPARE_STRING (strerror_l (-1, l),     "Erro desconhecido -1");
+
+  xuselocale (l);
+
+  TEST_COMPARE_STRING (strerror (EINVAL), "Argumento inv\303\241lido");
+  TEST_COMPARE_STRING (strerror (-1),     "Erro desconhecido -1");
+
+  {
+    char buffer[32];
+    TEST_COMPARE_STRING (strerror_r (EINVAL, buffer, 8),
+			 "Argumento inv\303\241lido");
+    TEST_COMPARE_STRING (strerror_r (-1, buffer, 8),
+			 "Erro de");
+    TEST_COMPARE_STRING (strerror_r (-1, buffer, 16),
+			 "Erro desconheci");
+    TEST_COMPARE_STRING (strerror_r (-1, buffer, 32),
+			 "Erro desconhecido -1");
+  }
+
+  freelocale (l);
+
+  return 0;
+}
+
+#include <support/test-driver.c>