--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/cmd/lvm/metassist/controller/getopt_ext.c	Tue Jun 02 18:56:50 2009 +0900
@@ -0,0 +1,151 @@
+/*
+ * 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 2003 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"@(#)getopt_ext.c	1.2	05/06/08 SMI"
+
+#include <stdio.h>
+#include <string.h>
+#include "volume_error.h"
+#include "getopt_ext.h"
+
+/*
+ * Functions
+ */
+
+/*
+ * Identical to getopt(3), except that
+ *
+ * 1. If "-" is the first character of optstring, each non-option argv
+ *    element is handled as if it were the argument of an option with
+ *    character code GETOPT_NON_OPTION_ARG.  The result is that
+ *    GETOPT_DONE_PARSING will not be returned until the end of the
+ *    argument list has been reached.
+ *
+ *    This mirrors the functionality provided by GNU getopt.
+ *
+ * 2. GETOPT_ERR_INVALID_OPT or GETOPT_ERR_MISSING_ARG is returned
+ *    instead of '?'.  Subsequently "-?" can be used as a valid
+ *    option.
+ *
+ * 3. GETOPT_DONE_PARSING, GETOPT_ERR_INVALID_ARG, or
+ *    GETOPT_NON_OPTION_ARG is returned instead of -1.
+ *
+ * @param       argc
+ *              The number of arguments in the array
+ *
+ * @param       argv
+ *              The argument array
+ *
+ * @param       optstring
+ *              The option letters, with ':' following options with
+ *              required arguments.  See note about "-" as the first
+ *              character.
+ *
+ * @return      GETOPT_ERR_INVALID_OPT
+ *              if the option is not found in optstring
+ *
+ *              GETOPT_ERR_MISSING_ARG
+ *              if the option requires an argument which is missing
+ *
+ *              GETOPT_ERR_INVALID_ARG
+ *              if "-" is not the first character in optstring and a
+ *              non-option argument is encountered
+ *
+ *              GETOPT_NON_OPTION_ARG
+ *              if "-" is the first character in optstring and a
+ *              non-option argument is encountered
+ *
+ *              GETOPT_DONE_PARSING
+ *              if the end of the argument list is reached
+ *
+ *              <optopt>
+ *              the option character itself, if none of the above
+ *              scenarios applies.
+ */
+extern int
+getopt_ext(
+    int argc,
+    char * const argv[],
+    const char *optstring)
+{
+	int c;
+	int handle_non_options = (*optstring == '-');
+
+	/* Is "-" the first character of optstring? */
+	if (handle_non_options) {
+	    /* getopt(3) doesn't understand "-" */
+	    optstring++;
+	}
+
+	switch (c = getopt(argc, argv, optstring)) {
+
+		/*
+		 * getopt(3) returns -1 when 1) it encounters a non-option
+		 * argument or 2) reaches the end of the argument list.
+		 * Distinguish from the two possibilities.
+		 */
+	    case -1:
+		if (optind < argc) {
+		    optarg = argv[optind];
+
+		    /* Non-option argument found */
+		    if (handle_non_options) {
+			/* Non-option arguments are valid */
+			c = GETOPT_NON_OPTION_ARG;
+			optind++;
+		    } else {
+			/* Non-option arguments are invalid */
+			c = GETOPT_ERR_INVALID_ARG;
+		    }
+		} else {
+		    /* End of the argument list reached */
+		    c = GETOPT_DONE_PARSING;
+		}
+	    break;
+
+		/*
+		 * getopt(3) returns '?' when 1) the "-?" option is
+		 * encountered, 2) an invalid option is given or 3) a
+		 * valid option requiring an argument is found but no
+		 * argument is specified.  Distinguish from the three
+		 * possibilities.
+		 */
+	    case '?':
+		/* Is this an error or was -? encountered? */
+		if (optopt != '?') {
+		    if (strchr(optstring, optopt) == NULL) {
+			/* Invalid option */
+			c = GETOPT_ERR_INVALID_OPT;
+			optarg = argv[optind-1];
+		    } else {
+			/* Valid option without required argument */
+			c = GETOPT_ERR_MISSING_ARG;
+		    }
+		}
+	}
+
+	return (c);
+}