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compat_getsubopt.c revision 1.1.1.2 
      1 #ifdef HAVE_CONFIG_H
      2 #include "config.h"
      3 #endif
      4 
      5 #ifdef HAVE_GETSUBOPT
      6 
      7 int dummy;
      8 
      9 #else
     10 
     11 /*	$OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $	*/
     12 
     13 /*-
     14  * Copyright (c) 1990, 1993
     15  *	The Regents of the University of California.  All rights reserved.
     16  *
     17  * Redistribution and use in source and binary forms, with or without
     18  * modification, are permitted provided that the following conditions
     19  * are met:
     20  * 1. Redistributions of source code must retain the above copyright
     21  *    notice, this list of conditions and the following disclaimer.
     22  * 2. Redistributions in binary form must reproduce the above copyright
     23  *    notice, this list of conditions and the following disclaimer in the
     24  *    documentation and/or other materials provided with the distribution.
     25  * 3. Neither the name of the University nor the names of its contributors
     26  *    may be used to endorse or promote products derived from this software
     27  *    without specific prior written permission.
     28  *
     29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     39  * SUCH DAMAGE.
     40  */
     41 
     42 #include <unistd.h>
     43 #include <stdlib.h>
     44 #include <string.h>
     45 
     46 /*
     47  * The SVID interface to getsubopt provides no way of figuring out which
     48  * part of the suboptions list wasn't matched.  This makes error messages
     49  * tricky...  The extern variable suboptarg is a pointer to the token
     50  * which didn't match.
     51  */
     52 char *suboptarg;
     53 
     54 int
     55 getsubopt(char **optionp, char * const *tokens, char **valuep)
     56 {
     57 	int cnt;
     58 	char *p;
     59 
     60 	suboptarg = *valuep = NULL;
     61 
     62 	if (!optionp || !*optionp)
     63 		return(-1);
     64 
     65 	/* skip leading white-space, commas */
     66 	for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
     67 
     68 	if (!*p) {
     69 		*optionp = p;
     70 		return(-1);
     71 	}
     72 
     73 	/* save the start of the token, and skip the rest of the token. */
     74 	for (suboptarg = p;
     75 	    *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
     76 
     77 	if (*p) {
     78 		/*
     79 		 * If there's an equals sign, set the value pointer, and
     80 		 * skip over the value part of the token.  Terminate the
     81 		 * token.
     82 		 */
     83 		if (*p == '=') {
     84 			*p = '\0';
     85 			for (*valuep = ++p;
     86 			    *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
     87 			if (*p)
     88 				*p++ = '\0';
     89 		} else
     90 			*p++ = '\0';
     91 		/* Skip any whitespace or commas after this token. */
     92 		for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
     93 	}
     94 
     95 	/* set optionp for next round. */
     96 	*optionp = p;
     97 
     98 	for (cnt = 0; *tokens; ++tokens, ++cnt)
     99 		if (!strcmp(suboptarg, *tokens))
    100 			return(cnt);
    101 	return(-1);
    102 }
    103 
    104 #endif
    105