1 files changed, 57 insertions, 0 deletions

diff --git a/lib/libspl/getexecname.c b/lib/libspl/getexecname.c
new file mode 100644
index 000000000000..c564eed055d9
--- /dev/null
+++ b/lib/libspl/getexecname.c
@@ -0,0 +1,57 @@
+/*
+ * 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;
+}