New POSIX xlocale implementation written from scratch.

Complete in the sense that all POSIX *locale(3) and *_l(3) functions
are included, but in OpenBSD, we of course only really care about
LC_CTYPE and we only support ASCII and UTF-8.

With important help from kettenis@, guenther@, and jca@.
Repeated testing in ports bulk builds by naddy@.
Additional testing by jca@, sebastia@, dcoppa@, and others.
OK kettenis@ dcoppa@, and guenther@ on an earlier version.
Riding guenther@'s libc/librthread major bump.

1 files changed, 33 insertions, 0 deletions

diff --git a/lib/libc/string/strerror_l.c b/lib/libc/string/strerror_l.c
new file mode 100644
index 00000000000..c16be7a0cc2
--- /dev/null
+++ b/lib/libc/string/strerror_l.c
@@ -0,0 +1,33 @@
+/*	$OpenBSD: strerror_l.c,v 1.1 2017/09/05 03:16:13 schwarze Exp $ */
+/*
+ * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <limits.h>
+#include <string.h>
+
+#include "thread_private.h"
+
+char *
+strerror_l(int errnum, locale_t locale)
+{
+	static char sel_buf[NL_TEXTMAX];
+	_THREAD_PRIVATE_KEY(strerror_l);
+	char *p = _THREAD_PRIVATE(strerror_l, sel_buf, NULL);
+
+	return p == NULL ? "no buffer available in strerror_l" :
+	    strerror_r(errnum, p, sizeof(sel_buf)) ?
+	    "strerror_r failure" : p;
+}