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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1988 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 /*
     33  * getsubopt - parse suboptions from a flag argument.
     34  */
     35 #pragma weak _getsubopt = getsubopt
     36 
     37 #include "lint.h"
     38 #include <sys/types.h>
     39 #include <string.h>
     40 #include <stdlib.h>
     41 #include <stdio.h>
     42 
     43 int
     44 getsubopt(char **optionsp, char * const *tokens, char **valuep)
     45 {
     46 	char *s = *optionsp, *p;
     47 	int i;
     48 	size_t optlen;
     49 
     50 	*valuep = NULL;
     51 	if (*s == '\0')
     52 		return (-1);
     53 	p = strchr(s, ',');		/* find next option */
     54 	if (p == NULL) {
     55 		p = s + strlen(s);
     56 	} else {
     57 		*p++ = '\0';		/* mark end and point to next */
     58 	}
     59 	*optionsp = p;			/* point to next option */
     60 	p = strchr(s, '=');		/* find value */
     61 	if (p == NULL) {
     62 		optlen = strlen(s);
     63 		*valuep = NULL;
     64 	} else {
     65 		optlen = p - s;
     66 		*valuep = ++p;
     67 	}
     68 	for (i = 0; tokens[i] != NULL; i++) {
     69 		if ((optlen == strlen(tokens[i])) &&
     70 		    (strncmp(s, tokens[i], optlen) == 0))
     71 			return (i);
     72 	}
     73 	/* no match, point value at option and return error */
     74 	*valuep = s;
     75 	return (-1);
     76 }
     77