1 /*
2 * Copyright (c) 1987, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * Lifted from FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.2.2.2
34 *
35 * $Id: getopt.c,v 1.1 2002/08/01 18:14:11 ejohnst Exp $
36 *
37 */
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42
43 int opterr = 1, /* if error message should be printed */
44 optind = 1, /* index into parent argv vector */
45 optopt, /* character checked for validity */
46 optreset; /* reset getopt */
47 char *optarg; /* argument associated with option */
48
49 #define BADCH (int)'?'
50 #define BADARG (int)':'
51 #define EMSG ""
52
53 /*
54 * getopt --
55 * Parse argc/argv argument vector.
56 */
57 int
getopt(nargc,nargv,ostr)58 getopt(nargc, nargv, ostr)
59 int nargc;
60 char * const *nargv;
61 const char *ostr;
62 {
63 extern const char *progname;
64 static char *place = EMSG; /* option letter processing */
65 char *oli; /* option letter list index */
66
67 if (optreset || !*place) { /* update scanning pointer */
68 optreset = 0;
69 if (optind >= nargc || *(place = nargv[optind]) != '-') {
70 place = EMSG;
71 return (-1);
72 }
73 if (place[1] && *++place == '-') { /* found "--" */
74 ++optind;
75 place = EMSG;
76 return (-1);
77 }
78 } /* option letter okay? */
79 if ((optopt = (int)*place++) == (int)':' ||
80 !(oli = strchr(ostr, optopt))) {
81 /*
82 * if the user didn't specify '-' as an option,
83 * assume it means -1.
84 */
85 if (optopt == (int)'-')
86 return (-1);
87 if (!*place)
88 ++optind;
89 if (opterr && *ostr != ':' && optopt != BADCH)
90 (void)fprintf(stderr,
91 "%s: illegal option -- %c\n", progname, optopt);
92 return (BADCH);
93 }
94 if (*++oli != ':') { /* don't need argument */
95 optarg = NULL;
96 if (!*place)
97 ++optind;
98 }
99 else { /* need an argument */
100 if (*place) /* no white space */
101 optarg = place;
102 else if (nargc <= ++optind) { /* no arg */
103 place = EMSG;
104 if (*ostr == ':')
105 return (BADARG);
106 if (opterr)
107 (void)fprintf(stderr,
108 "%s: option requires an argument -- %c\n",
109 progname, optopt);
110 return (BADCH);
111 }
112 else /* white space */
113 optarg = nargv[optind];
114 place = EMSG;
115 ++optind;
116 }
117 return (optopt); /* dump back option letter */
118 }
119