Complete initial import from mySQL 3.22.4 (mit-pthreads/).

Lots of dross to move and remove yet.

At minimum:
o	remove GNU config and GNU Makefiles
o	build arch directory and migrate away machdep/
o	rebuild BSD Makefiles
o	move notes etc. into doc/

1 files changed, 168 insertions, 0 deletions

diff --git a/lib/libpthread/net/res_search.c b/lib/libpthread/net/res_search.c
new file mode 100644
index 00000000000..64cddea20d4
--- /dev/null
+++ b/lib/libpthread/net/res_search.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 1985, 1988 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. All advertising materials mentioning features or use of this software
+ *	  must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+/*static char *sccsid = "from: @(#)res_search.c	6.45 (Berkeley) 2/24/91";*/
+static char *rcsid = "$Id: res_search.c,v 1.1 1998/07/21 13:19:47 peter Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <pthread.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <resolv.h>
+#include <netdb.h>
+#include "res_internal.h"
+
+static char *search_aliases(const char *name, char *buf, int bufsize);
+
+int res_search(const char *name, int class, int type, unsigned char *answer,
+			   int anslen)
+{
+	struct res_data *data;
+	const char *p;
+	int num_dots, len, result, no_data = 0, error;
+	char buf[2 * MAXDNAME + 2], *domain, **dptr, *alias;
+
+	data = _res_init();
+	if (!data)
+		return -1;
+
+	/* Count the dots in name, and get a pointer to the end of name. */
+	num_dots = 0;
+	for (p = name; *p; p++) {
+		if (*p == '.')
+			num_dots++;
+	}
+	len = p - name;
+
+	/* If there aren't any dots, check to see if name is an alias for
+	 * another host.  If so, try the resolved alias as a fully-qualified
+	 * name. */
+	alias = search_aliases(name, buf, sizeof(buf));
+	if (alias != NULL)
+		return res_query(alias, class, type, answer, anslen);
+
+	/* If there's a trailing dot, try to strip it off and query the name. */
+	if (len > 0 && p[-1] == '.') {
+		if (len > sizeof(buf)) {
+			/* It's too long; just query the original name. */
+			return res_query(name, class, type, answer, anslen);
+		} else {
+			/* Copy the name without the trailing dot and query. */
+			memcpy(buf, name, len - 1);
+			buf[len] = 0;
+			return res_query(buf, class, type, answer, anslen);
+		}
+	}
+
+	if (data->state.options & RES_DNSRCH) {
+		/* If RES_DNSRCH is set, query all the domains until we get a
+		 * definitive answer. */
+		for (dptr = data->state.dnsrch; *dptr; dptr++) {
+			domain = *dptr;
+			sprintf(buf, "%.*s.%.*s", MAXDNAME, name, MAXDNAME, domain);
+			result = res_query(buf, class, type, answer, anslen);
+			if (result > 0)
+				return result;
+			if (data->errval == NO_DATA)
+				no_data = 1;
+			else if (data->errval != HOST_NOT_FOUND)
+				break;
+		}
+	} else if (num_dots == 0 && data->state.options & RES_DEFNAMES) {
+		/* If RES_DEFNAMES is set and there is no dot, query the default
+		 * domain. */
+		domain = data->state.defdname;
+		sprintf(buf, "%.*s.%.%s", MAXDNAME, name, MAXDNAME, domain);
+		result = res_query(buf, class, type, answer, anslen);
+		if (result > 0)
+			return result;
+		if (data->errval == NO_DATA)
+			no_data = 1;
+	}
+
+	/* If all the domain queries failed, try the name as fully-qualified.
+	 * Only do this if there is at least one dot in the name. */
+	if (num_dots > 0) {
+		result = res_query(name, class, type, answer, anslen);
+		if (result > 0)
+			return result;
+	}
+
+	if (no_data)
+		data->errval = NO_DATA;
+
+	return -1;
+}
+
+static char *search_aliases(const char *name, char *buf, int bufsize)
+{
+	FILE *fp;
+	char *filename, *p;
+	int len;
+
+	filename = getenv("HOSTALIASES");
+	if (filename == NULL)
+		return NULL;
+
+	fp = fopen(filename, "r");
+	if (fp == NULL)
+		return NULL;
+
+	len = strlen(name);
+	while (fgets(buf, bufsize, fp)) {
+
+		/* Get the first word from the buffer. */
+		p = buf;
+		while (*p && !isspace(*p))
+			p++;
+		if (!*p)
+			break;
+
+		/* Null-terminate the first word and compare it with the name. */
+		*p = 0;
+		if (strcasecmp(buf, name) != 0)
+			continue;
+
+		p++;
+		while (isspace(*p))
+			p++;
+		fclose(fp);
+		return (*p) ? p : NULL;
+	}
+
+	fclose(fp);
+	return NULL;
+}
+