1 /*- 2 * Copyright (c) 1991 Keith Muller. 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Keith Muller of the University of California, San Diego. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)egetopt.c 8.1 (Berkeley) 6/6/93 38 * 39 * $DragonFly: src/usr.bin/pr/egetopt.c,v 1.4 2008/10/16 01:52:32 swildner Exp $ 40 */ 41 42 #include <ctype.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include "extern.h" 48 49 /* 50 * egetopt: get option letter from argument vector (an extended 51 * version of getopt). 52 * 53 * Non standard additions to the ostr specs are: 54 * 1) '?': immediate value following arg is optional (no white space 55 * between the arg and the value) 56 * 2) '#': +/- followed by a number (with an optional sign but 57 * no white space between the arg and the number). The - may be 58 * combined with other options, but the + cannot. 59 */ 60 61 int eopterr = 1; /* if error message should be printed */ 62 int eoptind = 1; /* index into parent argv vector */ 63 int eoptopt; /* character checked for validity */ 64 char *eoptarg; /* argument associated with option */ 65 66 #define BADCH (int)'?' 67 #define EMSG "" 68 69 int 70 egetopt(int nargc, char * const *nargv, const char *ostr) 71 { 72 static char *place = EMSG; /* option letter processing */ 73 char *oli; /* option letter list index */ 74 static int delim; /* which option delimeter */ 75 char *p; 76 static char savec = '\0'; 77 78 if (savec != '\0') { 79 *place = savec; 80 savec = '\0'; 81 } 82 83 if (!*place) { 84 /* 85 * update scanning pointer 86 */ 87 if ((eoptind >= nargc) || 88 ((*(place = nargv[eoptind]) != '-') && (*place != '+'))) { 89 place = EMSG; 90 return (EOF); 91 } 92 93 delim = (int)*place; 94 if (place[1] && *++place == '-' && !place[1]) { 95 /* 96 * found "--" 97 */ 98 ++eoptind; 99 place = EMSG; 100 return (EOF); 101 } 102 } 103 104 /* 105 * check option letter 106 */ 107 if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') || 108 !(oli = strchr(ostr, eoptopt))) { 109 /* 110 * if the user didn't specify '-' as an option, 111 * assume it means EOF when by itself. 112 */ 113 if ((eoptopt == (int)'-') && !*place) 114 return (EOF); 115 if (strchr(ostr, '#') && (isdigit(eoptopt) || 116 (((eoptopt == (int)'-') || (eoptopt == (int)'+')) && 117 isdigit(*place)))) { 118 /* 119 * # option: +/- with a number is ok 120 */ 121 for (p = place; *p != '\0'; ++p) { 122 if (!isdigit(*p)) 123 break; 124 } 125 eoptarg = place-1; 126 127 if (*p == '\0') { 128 place = EMSG; 129 ++eoptind; 130 } else { 131 place = p; 132 savec = *p; 133 *place = '\0'; 134 } 135 return (delim); 136 } 137 138 if (!*place) 139 ++eoptind; 140 if (eopterr) { 141 if (!(p = strrchr(*nargv, '/'))) 142 p = *nargv; 143 else 144 ++p; 145 (void)fprintf(stderr, "%s: illegal option -- %c\n", 146 p, eoptopt); 147 } 148 return (BADCH); 149 } 150 if (delim == (int)'+') { 151 /* 152 * '+' is only allowed with numbers 153 */ 154 if (!*place) 155 ++eoptind; 156 if (eopterr) { 157 if (!(p = strrchr(*nargv, '/'))) 158 p = *nargv; 159 else 160 ++p; 161 (void)fprintf(stderr, 162 "%s: illegal '+' delimiter with option -- %c\n", 163 p, eoptopt); 164 } 165 return (BADCH); 166 } 167 ++oli; 168 if ((*oli != ':') && (*oli != '?')) { 169 /* 170 * don't need argument 171 */ 172 eoptarg = NULL; 173 if (!*place) 174 ++eoptind; 175 return (eoptopt); 176 } 177 178 if (*place) { 179 /* 180 * no white space 181 */ 182 eoptarg = place; 183 } else if (*oli == '?') { 184 /* 185 * no arg, but NOT required 186 */ 187 eoptarg = NULL; 188 } else if (nargc <= ++eoptind) { 189 /* 190 * no arg, but IS required 191 */ 192 place = EMSG; 193 if (eopterr) { 194 if (!(p = strrchr(*nargv, '/'))) 195 p = *nargv; 196 else 197 ++p; 198 (void)fprintf(stderr, 199 "%s: option requires an argument -- %c\n", p, 200 eoptopt); 201 } 202 return (BADCH); 203 } else { 204 /* 205 * arg has white space 206 */ 207 eoptarg = nargv[eoptind]; 208 } 209 place = EMSG; 210 ++eoptind; 211 return (eoptopt); 212 } 213