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1.5 ! millert 1: /* $OpenBSD: egetopt.c,v 1.4 2001/11/19 19:02:15 mpech Exp $ */
1.2 deraadt 2:
1.1 deraadt 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.
1.5 ! millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: /* from: static char sccsid[] = "@(#)egetopt.c 8.1 (Berkeley) 6/6/93"; */
1.5 ! millert 38: static char *rcsid = "$OpenBSD: egetopt.c,v 1.4 2001/11/19 19:02:15 mpech Exp $";
1.1 deraadt 39: #endif /* not lint */
40:
41: #include <ctype.h>
42: #include <stdio.h>
43: #include <stdlib.h>
44: #include <string.h>
45:
46: #include "extern.h"
47:
48: /*
49: * egetopt: get option letter from argument vector (an extended
50: * version of getopt).
51: *
52: * Non standard additions to the ostr specs are:
53: * 1) '?': immediate value following arg is optional (no white space
54: * between the arg and the value)
55: * 2) '#': +/- followed by a number (with an optional sign but
56: * no white space between the arg and the number). The - may be
57: * combined with other options, but the + cannot.
58: */
59:
60: int eopterr = 1; /* if error message should be printed */
61: int eoptind = 1; /* index into parent argv vector */
62: int eoptopt; /* character checked for validity */
63: char *eoptarg; /* argument associated with option */
64:
65: #define BADCH (int)'?'
66: #define EMSG ""
67:
68: int
69: egetopt(nargc, nargv, ostr)
70: int nargc;
71: char * const *nargv;
72: const char *ostr;
73: {
74: static char *place = EMSG; /* option letter processing */
1.4 mpech 75: char *oli; /* option letter list index */
1.1 deraadt 76: static int delim; /* which option delimeter */
1.4 mpech 77: char *p;
1.1 deraadt 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;
1.3 millert 92: return (-1);
1.1 deraadt 93: }
94:
95: delim = (int)*place;
96: if (place[1] && *++place == '-' && !place[1]) {
97: /*
98: * found "--"
99: */
100: ++eoptind;
101: place = EMSG;
1.3 millert 102: return (-1);
1.1 deraadt 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 EOF when by itself.
114: */
115: if ((eoptopt == (int)'-') && !*place)
1.3 millert 116: return (-1);
1.1 deraadt 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: }