1 files changed, 96 insertions, 0 deletions
diff --git a/src/util/support/strerror_r.c b/src/util/support/strerror_r.c
new file mode 100644
index 000000000000..e1ca5651078d
--- /dev/null
+++ b/src/util/support/strerror_r.c
@@ -0,0 +1,96 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* util/support/strerror_r.c - strerror_r compatibility shim */
+/*
+ * Copyright (C) 2014 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <k5-platform.h>
+#undef strerror_r
+
+#if defined(_WIN32)
+
+/* Implement strerror_r in terms of strerror_s. */
+int
+k5_strerror_r(int errnum, char *buf, size_t buflen)
+{
+    int st;
+
+    st = strerror_s(buf, buflen, errnum);
+    if (st != 0) {
+        errno = st;
+        return -1;
+    }
+}
+
+#elif !defined(HAVE_STRERROR_R)
+
+/* Implement strerror_r in terms of strerror (not thread-safe). */
+int
+k5_strerror_r(int errnum, char *buf, size_t buflen)
+{
+    if (strlcpy(buf, strerror(errnum), buflen) >= buflen) {
+        errno = ERANGE;
+        return -1;
+    }
+    return 0;
+}
+
+#elif defined(STRERROR_R_CHAR_P)
+
+/*
+ * Implement the POSIX strerror_r API in terms of the GNU strerror_r, which
+ * returns a pointer to either the caller buffer or a constant string.  This is
+ * the default version on glibc systems when _GNU_SOURCE is defined.
+ */
+int
+k5_strerror_r(int errnum, char *buf, size_t buflen)
+{
+    const char *str;
+
+    str = strerror_r(errnum, buf, buflen);
+    if (str != buf) {
+        if (strlcpy(buf, str, buflen) >= buflen) {
+            errno = ERANGE;
+            return -1;
+        }
+    }
+    return 0;
+}
+
+#else
+
+/* Define a stub in terms of the real strerror_r, just to simplify the library
+ * export list.  This shouldn't get used. */
+int
+k5_strerror_r(int errnum, char *buf, size_t buflen)
+{
+    return strerror_r(errnum, buf, buflen);
+}
+
+#endif