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1.4 ! mpech 1: /* $OpenBSD: egetopt.c,v 1.3 1999/05/23 17:37:41 millert 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.
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: #ifndef lint
41: /* from: static char sccsid[] = "@(#)egetopt.c 8.1 (Berkeley) 6/6/93"; */
1.4 ! mpech 42: static char *rcsid = "$OpenBSD: egetopt.c,v 1.3 1999/05/23 17:37:41 millert Exp $";
1.1 deraadt 43: #endif /* not lint */
44:
45: #include <ctype.h>
46: #include <stdio.h>
47: #include <stdlib.h>
48: #include <string.h>
49:
50: #include "extern.h"
51:
52: /*
53: * egetopt: get option letter from argument vector (an extended
54: * version of getopt).
55: *
56: * Non standard additions to the ostr specs are:
57: * 1) '?': immediate value following arg is optional (no white space
58: * between the arg and the value)
59: * 2) '#': +/- followed by a number (with an optional sign but
60: * no white space between the arg and the number). The - may be
61: * combined with other options, but the + cannot.
62: */
63:
64: int eopterr = 1; /* if error message should be printed */
65: int eoptind = 1; /* index into parent argv vector */
66: int eoptopt; /* character checked for validity */
67: char *eoptarg; /* argument associated with option */
68:
69: #define BADCH (int)'?'
70: #define EMSG ""
71:
72: int
73: egetopt(nargc, nargv, ostr)
74: int nargc;
75: char * const *nargv;
76: const char *ostr;
77: {
78: static char *place = EMSG; /* option letter processing */
1.4 ! mpech 79: char *oli; /* option letter list index */
1.1 deraadt 80: static int delim; /* which option delimeter */
1.4 ! mpech 81: char *p;
1.1 deraadt 82: static char savec = '\0';
83:
84: if (savec != '\0') {
85: *place = savec;
86: savec = '\0';
87: }
88:
89: if (!*place) {
90: /*
91: * update scanning pointer
92: */
93: if ((eoptind >= nargc) ||
94: ((*(place = nargv[eoptind]) != '-') && (*place != '+'))) {
95: place = EMSG;
1.3 millert 96: return (-1);
1.1 deraadt 97: }
98:
99: delim = (int)*place;
100: if (place[1] && *++place == '-' && !place[1]) {
101: /*
102: * found "--"
103: */
104: ++eoptind;
105: place = EMSG;
1.3 millert 106: return (-1);
1.1 deraadt 107: }
108: }
109:
110: /*
111: * check option letter
112: */
113: if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') ||
114: !(oli = strchr(ostr, eoptopt))) {
115: /*
116: * if the user didn't specify '-' as an option,
117: * assume it means EOF when by itself.
118: */
119: if ((eoptopt == (int)'-') && !*place)
1.3 millert 120: return (-1);
1.1 deraadt 121: if (strchr(ostr, '#') && (isdigit(eoptopt) ||
122: (((eoptopt == (int)'-') || (eoptopt == (int)'+')) &&
123: isdigit(*place)))) {
124: /*
125: * # option: +/- with a number is ok
126: */
127: for (p = place; *p != '\0'; ++p) {
128: if (!isdigit(*p))
129: break;
130: }
131: eoptarg = place-1;
132:
133: if (*p == '\0') {
134: place = EMSG;
135: ++eoptind;
136: } else {
137: place = p;
138: savec = *p;
139: *place = '\0';
140: }
141: return (delim);
142: }
143:
144: if (!*place)
145: ++eoptind;
146: if (eopterr) {
147: if (!(p = strrchr(*nargv, '/')))
148: p = *nargv;
149: else
150: ++p;
151: (void)fprintf(stderr, "%s: illegal option -- %c\n",
152: p, eoptopt);
153: }
154: return (BADCH);
155: }
156: if (delim == (int)'+') {
157: /*
158: * '+' is only allowed with numbers
159: */
160: if (!*place)
161: ++eoptind;
162: if (eopterr) {
163: if (!(p = strrchr(*nargv, '/')))
164: p = *nargv;
165: else
166: ++p;
167: (void)fprintf(stderr,
168: "%s: illegal '+' delimiter with option -- %c\n",
169: p, eoptopt);
170: }
171: return (BADCH);
172: }
173: ++oli;
174: if ((*oli != ':') && (*oli != '?')) {
175: /*
176: * don't need argument
177: */
178: eoptarg = NULL;
179: if (!*place)
180: ++eoptind;
181: return (eoptopt);
182: }
183:
184: if (*place) {
185: /*
186: * no white space
187: */
188: eoptarg = place;
189: } else if (*oli == '?') {
190: /*
191: * no arg, but NOT required
192: */
193: eoptarg = NULL;
194: } else if (nargc <= ++eoptind) {
195: /*
196: * no arg, but IS required
197: */
198: place = EMSG;
199: if (eopterr) {
200: if (!(p = strrchr(*nargv, '/')))
201: p = *nargv;
202: else
203: ++p;
204: (void)fprintf(stderr,
205: "%s: option requires an argument -- %c\n", p,
206: eoptopt);
207: }
208: return (BADCH);
209: } else {
210: /*
211: * arg has white space
212: */
213: eoptarg = nargv[eoptind];
214: }
215: place = EMSG;
216: ++eoptind;
217: return (eoptopt);
218: }