11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 13251069Semaste * 3. Neither the name of the University nor the names of its contributors 141573Srgrimes * may be used to endorse or promote products derived from this software 151573Srgrimes * without specific prior written permission. 161573Srgrimes * 171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271573Srgrimes * SUCH DAMAGE. 281573Srgrimes */ 291573Srgrimes 3092889Sobrien#if defined(LIBC_SCCS) && !defined(lint) 311573Srgrimesstatic char sccsid[] = "@(#)getsubopt.c 8.1 (Berkeley) 6/4/93"; 3292889Sobrien#endif /* LIBC_SCCS and not lint */ 3392889Sobrien#include <sys/cdefs.h> 3492889Sobrien__FBSDID("$FreeBSD$"); 351573Srgrimes 36108623Stjr#include <stdlib.h> 37108623Stjr#include <string.h> 381573Srgrimes 391573Srgrimes/* 401573Srgrimes * The SVID interface to getsubopt provides no way of figuring out which 411573Srgrimes * part of the suboptions list wasn't matched. This makes error messages 421573Srgrimes * tricky... The extern variable suboptarg is a pointer to the token 431573Srgrimes * which didn't match. 441573Srgrimes */ 451573Srgrimeschar *suboptarg; 461573Srgrimes 4717141Sjkhint 481573Srgrimesgetsubopt(optionp, tokens, valuep) 4992889Sobrien char **optionp, **valuep; 5092889Sobrien char * const *tokens; 511573Srgrimes{ 5292889Sobrien int cnt; 5392889Sobrien char *p; 541573Srgrimes 551573Srgrimes suboptarg = *valuep = NULL; 561573Srgrimes 571573Srgrimes if (!optionp || !*optionp) 581573Srgrimes return(-1); 591573Srgrimes 601573Srgrimes /* skip leading white-space, commas */ 611573Srgrimes for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); 621573Srgrimes 631573Srgrimes if (!*p) { 641573Srgrimes *optionp = p; 651573Srgrimes return(-1); 661573Srgrimes } 671573Srgrimes 681573Srgrimes /* save the start of the token, and skip the rest of the token. */ 691573Srgrimes for (suboptarg = p; 701573Srgrimes *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';); 711573Srgrimes 721573Srgrimes if (*p) { 731573Srgrimes /* 741573Srgrimes * If there's an equals sign, set the value pointer, and 751573Srgrimes * skip over the value part of the token. Terminate the 761573Srgrimes * token. 771573Srgrimes */ 781573Srgrimes if (*p == '=') { 791573Srgrimes *p = '\0'; 801573Srgrimes for (*valuep = ++p; 811573Srgrimes *p && *p != ',' && *p != ' ' && *p != '\t'; ++p); 828870Srgrimes if (*p) 831573Srgrimes *p++ = '\0'; 841573Srgrimes } else 851573Srgrimes *p++ = '\0'; 861573Srgrimes /* Skip any whitespace or commas after this token. */ 871573Srgrimes for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); 881573Srgrimes } 891573Srgrimes 901573Srgrimes /* set optionp for next round. */ 911573Srgrimes *optionp = p; 921573Srgrimes 931573Srgrimes for (cnt = 0; *tokens; ++tokens, ++cnt) 941573Srgrimes if (!strcmp(suboptarg, *tokens)) 951573Srgrimes return(cnt); 961573Srgrimes return(-1); 971573Srgrimes} 98