1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1991 Keith Muller. 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Keith Muller of the University of California, San Diego. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #if 0 41 #endif 42 43 #include <sys/cdefs.h> 44 #include <ctype.h> 45 #include <stdio.h> 46 #include <string.h> 47 48 #include "extern.h" 49 50 /* 51 * egetopt: get option letter from argument vector (an extended 52 * version of getopt). 53 * 54 * Non standard additions to the ostr specs are: 55 * 1) '?': immediate value following arg is optional (no white space 56 * between the arg and the value) 57 * 2) '#': +/- followed by a number (with an optional sign but 58 * no white space between the arg and the number). The - may be 59 * combined with other options, but the + cannot. 60 */ 61 62 int eopterr = 1; /* if error message should be printed */ 63 int eoptind = 1; /* index into parent argv vector */ 64 int eoptopt; /* character checked for validity */ 65 char *eoptarg; /* argument associated with option */ 66 67 #define BADCH (int)'?' 68 69 static char emsg[] = ""; 70 71 int 72 egetopt(int nargc, char * const *nargv, const char *ostr) 73 { 74 static char *place = emsg; /* option letter processing */ 75 char *oli; /* option letter list index */ 76 static int delim; /* which option delimiter */ 77 char *p; 78 static char savec = '\0'; 79 80 if (savec != '\0') { 81 *place = savec; 82 savec = '\0'; 83 } 84 85 if (!*place) { 86 /* 87 * update scanning pointer 88 */ 89 if ((eoptind >= nargc) || 90 ((*(place = nargv[eoptind]) != '-') && (*place != '+'))) { 91 place = emsg; 92 return (-1); 93 } 94 95 delim = (int)*place; 96 if (place[1] && *++place == '-' && !place[1]) { 97 /* 98 * found "--" 99 */ 100 ++eoptind; 101 place = emsg; 102 return (-1); 103 } 104 } 105 106 /* 107 * check option letter 108 */ 109 if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') || 110 !(oli = strchr(ostr, eoptopt))) { 111 /* 112 * if the user didn't specify '-' as an option, 113 * assume it means -1 when by itself. 114 */ 115 if ((eoptopt == (int)'-') && !*place) 116 return (-1); 117 if (strchr(ostr, '#') && (isdigit(eoptopt) || 118 (((eoptopt == (int)'-') || (eoptopt == (int)'+')) && 119 isdigit(*place)))) { 120 /* 121 * # option: +/- with a number is ok 122 */ 123 for (p = place; *p != '\0'; ++p) { 124 if (!isdigit(*p)) 125 break; 126 } 127 eoptarg = place-1; 128 129 if (*p == '\0') { 130 place = emsg; 131 ++eoptind; 132 } else { 133 place = p; 134 savec = *p; 135 *place = '\0'; 136 } 137 return (delim); 138 } 139 140 if (!*place) 141 ++eoptind; 142 if (eopterr) { 143 if (!(p = strrchr(*nargv, '/'))) 144 p = *nargv; 145 else 146 ++p; 147 (void)fprintf(stderr, "%s: illegal option -- %c\n", 148 p, eoptopt); 149 } 150 return (BADCH); 151 } 152 if (delim == (int)'+') { 153 /* 154 * '+' is only allowed with numbers 155 */ 156 if (!*place) 157 ++eoptind; 158 if (eopterr) { 159 if (!(p = strrchr(*nargv, '/'))) 160 p = *nargv; 161 else 162 ++p; 163 (void)fprintf(stderr, 164 "%s: illegal '+' delimiter with option -- %c\n", 165 p, eoptopt); 166 } 167 return (BADCH); 168 } 169 ++oli; 170 if ((*oli != ':') && (*oli != '?')) { 171 /* 172 * don't need argument 173 */ 174 eoptarg = NULL; 175 if (!*place) 176 ++eoptind; 177 return (eoptopt); 178 } 179 180 if (*place) { 181 /* 182 * no white space 183 */ 184 eoptarg = place; 185 } else if (*oli == '?') { 186 /* 187 * no arg, but NOT required 188 */ 189 eoptarg = NULL; 190 } else if (nargc <= ++eoptind) { 191 /* 192 * no arg, but IS required 193 */ 194 place = emsg; 195 if (eopterr) { 196 if (!(p = strrchr(*nargv, '/'))) 197 p = *nargv; 198 else 199 ++p; 200 (void)fprintf(stderr, 201 "%s: option requires an argument -- %c\n", p, 202 eoptopt); 203 } 204 return (BADCH); 205 } else { 206 /* 207 * arg has white space 208 */ 209 eoptarg = nargv[eoptind]; 210 } 211 place = emsg; 212 ++eoptind; 213 return (eoptopt); 214 } 215