+/*
+ * 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 2007 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+
+#include <string.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <limits.h>
+
+const char *
+getexecname(void)
+{
+ static char execname[PATH_MAX + 1] = "";
+ static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
+ char *ptr = NULL;
+ ssize_t rc;
+
+ pthread_mutex_lock(&mtx);
+
+ if (strlen(execname) == 0) {
+ rc = readlink("/proc/self/exe", execname, sizeof(execname) - 1);
+ if (rc == -1) {
+ execname[0] = '\0';
+ } else {
+ execname[rc] = '\0';
+ ptr = execname;
+ }
+ } else {
+ ptr = execname;
+ }
+
+ pthread_mutex_unlock(&mtx);
+ return ptr;
+}