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
34 /*#if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
36 #endif /* LIBC_SCCS and not lint
37 #include <sys/cdefs.h>
38 //__FBSDID("$FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.6 2002/03/29 22:43:42 markm Exp $");
39
40 #include "namespace.h"*/
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 /*#include "un-namespace.h"*/
45
46 /*#include "libc_private.h"*/
47
48 int opterr = 1, /* if error message should be printed */
49 optind = 1, /* index into parent argv vector */
50 optopt, /* character checked for validity */
51 optreset; /* reset getopt */
52 char *optarg; /* argument associated with option */
53
54 #define BADCH (int)'?'
55 #define BADARG (int)':'
56 #define EMSG ""
57
58 /*
59 * getopt --
60 * Parse argc/argv argument vector.
61 */
62 int
getopt(nargc,nargv,ostr)63 getopt(nargc, nargv, ostr)
64 int nargc;
65 char * const *nargv;
66 const char *ostr;
67 {
68 static char *place = EMSG; /* option letter processing */
69 char *oli; /* option letter list index */
70
71 if (optreset || !*place) { /* update scanning pointer */
72 optreset = 0;
73 if (optind >= nargc || *(place = nargv[optind]) != '-') {
74 place = EMSG;
75 return (-1);
76 }
77 if (place[1] && *++place == '-') { /* found "--" */
78 ++optind;
79 place = EMSG;
80 return (-1);
81 }
82 } /* option letter okay? */
83 if ((optopt = (int)*place++) == (int)':' ||
84 !(oli = strchr(ostr, optopt))) {
85 /*
86 * if the user didn't specify '-' as an option,
87 * assume it means -1.
88 */
89 if (optopt == (int)'-')
90 return (-1);
91 if (!*place)
92 ++optind;
93 if (opterr && *ostr != ':' && optopt != BADCH)
94 (void)fprintf(stderr, "%s: illegal option -- %c\n",
95 "progname", optopt);
96 return (BADCH);
97 }
98 if (*++oli != ':') { /* don't need argument */
99 optarg = NULL;
100 if (!*place)
101 ++optind;
102 } else { /* need an argument */
103 if (*place) /* no white space */
104 optarg = place;
105 else if (nargc <= ++optind) { /* no arg */
106 place = EMSG;
107 if (*ostr == ':')
108 return (BADARG);
109 if (opterr)
110 (void)fprintf(stderr,
111 "%s: option requires an argument -- %c\n",
112 "progname", optopt);
113 return (BADCH);
114 } else /* white space */
115 optarg = nargv[optind];
116 place = EMSG;
117 ++optind;
118 }
119 return (optopt); /* dump back option letter */
120 }
121