1 /* $Id: compat_getsubopt.c,v 1.6 2020/06/15 01:37:15 schwarze Exp $ */ 2 /* $OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $ */ 3 4 /*- 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 #include "config.h" 33 34 #include <unistd.h> 35 #include <stdlib.h> 36 #include <string.h> 37 38 int 39 getsubopt(char **optionp, char * const *tokens, char **valuep) 40 { 41 int cnt; 42 char *suboptarg; 43 char *p; 44 45 suboptarg = *valuep = NULL; 46 47 if (!optionp || !*optionp) 48 return(-1); 49 50 /* skip leading white-space, commas */ 51 for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); 52 53 if (!*p) { 54 *optionp = p; 55 return(-1); 56 } 57 58 /* save the start of the token, and skip the rest of the token. */ 59 for (suboptarg = p; 60 *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';); 61 62 if (*p) { 63 /* 64 * If there's an equals sign, set the value pointer, and 65 * skip over the value part of the token. Terminate the 66 * token. 67 */ 68 if (*p == '=') { 69 *p = '\0'; 70 for (*valuep = ++p; 71 *p && *p != ',' && *p != ' ' && *p != '\t'; ++p); 72 if (*p) 73 *p++ = '\0'; 74 } else 75 *p++ = '\0'; 76 /* Skip any whitespace or commas after this token. */ 77 for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); 78 } 79 80 /* set optionp for next round. */ 81 *optionp = p; 82 83 for (cnt = 0; *tokens; ++tokens, ++cnt) 84 if (!strcmp(suboptarg, *tokens)) 85 return(cnt); 86 return(-1); 87 } 88