1 files changed, 106 insertions, 0 deletions

diff --git a/src/lib/libc/net/herror.c b/src/lib/libc/net/herror.c
new file mode 100644
index 0000000000..7787115a9d
--- /dev/null
+++ b/src/lib/libc/net/herror.c
@@ -0,0 +1,106 @@
+/*      $OpenBSD: herror.c,v 1.8 2005/08/06 20:30:03 espie Exp $        */
+
+/*
+ * ++Copyright++ 1987, 1993
+ * -
+ * Copyright (c) 1987, 1993
+ *    The Regents of the University of California.  All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * 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, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION 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.
+ * -
+ * --Copyright--
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/uio.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <string.h>
+
+const char * const h_errlist[] = {
+        "Resolver Error 0 (no error)",
+        "Unknown host",                         /* 1 HOST_NOT_FOUND */
+        "Host name lookup failure",             /* 2 TRY_AGAIN */
+        "Unknown server error",                 /* 3 NO_RECOVERY */
+        "No address associated with name",      /* 4 NO_ADDRESS */
+};
+const int       h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
+
+extern int      h_errno;
+
+/*
+ * herror --
+ *      print the error indicated by the h_errno value.
+ */
+void
+herror(const char *s)
+{
+        struct iovec iov[4];
+        struct iovec *v = iov;
+
+        if (s && *s) {
+                v->iov_base = (char *)s;
+                v->iov_len = strlen(s);
+                v++;
+                v->iov_base = ": ";
+                v->iov_len = 2;
+                v++;
+        }
+        v->iov_base = (char *)hstrerror(h_errno);
+        v->iov_len = strlen(v->iov_base);
+        v++;
+        v->iov_base = "\n";
+        v->iov_len = 1;
+        writev(STDERR_FILENO, iov, (v - iov) + 1);
+}
+
+const char *
+hstrerror(int err)
+{
+        if (err < 0)
+                return ("Resolver internal error");
+        else if (err < h_nerr)
+                return (h_errlist[err]);
+        return ("Unknown resolver error");
+}