--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/lib/libc/port/gen/getauxv.c	Tue Jun 14 00:00:00 2005 -0700
@@ -0,0 +1,123 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "lint.h"
+#include <libc.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/auxv.h>
+#include <mtlib.h>
+#include <thread.h>
+#include <synch.h>
+
+static mutex_t auxlock = DEFAULTMUTEX;
+
+/*
+ * Get auxiliary entry.
+ * Returns pointer to entry, or 0 if entry does not exist.
+ */
+static auxv_t *
+_getaux(int type)
+{
+	static auxv_t *auxb = NULL;
+	static size_t nauxv = 0;
+	ssize_t i;
+
+	/*
+	 * The first time through, read the initial aux vector that was
+	 * passed to the process at exec(2).  Only do this once.
+	 */
+	if (auxb == NULL) {
+		struct stat statb;
+		int fd;
+
+		lmutex_lock(&auxlock);
+
+		if (auxb == NULL) {
+			if ((fd = open("/proc/self/auxv", O_RDONLY)) != -1 &&
+			    fstat(fd, &statb) != -1)
+				auxb = libc_malloc(
+				    statb.st_size + sizeof (auxv_t));
+
+			if (auxb != NULL) {
+				i = read(fd, auxb, statb.st_size);
+				if (i != -1) {
+					nauxv = i / sizeof (auxv_t);
+					auxb[nauxv].a_type = AT_NULL;
+				} else {
+					libc_free(auxb);
+					auxb = NULL;
+				}
+			}
+
+			if (fd != -1)
+				(void) close(fd);
+		}
+
+		lmutex_unlock(&auxlock);
+	}
+
+	/*
+	 * Scan the auxiliary entries looking for the required type.
+	 */
+	for (i = 0; i < nauxv; i++)
+		if (auxb[i].a_type == type)
+			return (&auxb[i]);
+
+	/*
+	 * No auxiliary array (static executable) or entry not found.
+	 */
+	return ((auxv_t *)0);
+}
+
+/*
+ * These two routines are utilities exported to the rest of libc.
+ */
+
+long
+___getauxval(int type)
+{
+	auxv_t *auxp;
+
+	if ((auxp = _getaux(type)) != (auxv_t *)0)
+		return (auxp->a_un.a_val);
+	return (0);
+}
+
+void *
+___getauxptr(int type)
+{
+	auxv_t *auxp;
+
+	if ((auxp = _getaux(type)) != (auxv_t *)0)
+		return (auxp->a_un.a_ptr);
+	return (0);
+}