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-rw-r--r--tests/perror.c49
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+/* Print a message describing error code.
+ Copyright (C) 2008-2022 Free Software Foundation, Inc.
+ Written by Bruno Haible and Simon Josefsson.
+
+ This file 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.
+
+ This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include <stdio.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "strerror-override.h"
+
+/* Use the system functions, not the gnulib overrides in this file. */
+#undef fprintf
+
+void
+perror (const char *string)
+{
+ char stackbuf[STACKBUF_LEN];
+ int ret;
+
+ /* Our implementation guarantees that this will be a non-empty
+ string, even if it returns EINVAL; and stackbuf should be sized
+ large enough to avoid ERANGE. */
+ ret = strerror_r (errno, stackbuf, sizeof stackbuf);
+ if (ret == ERANGE)
+ abort ();
+
+ if (string != NULL && *string != '\0')
+ fprintf (stderr, "%s: %s\n", string, stackbuf);
+ else
+ fprintf (stderr, "%s\n", stackbuf);
+}