1 /* -*- mode: c; c-file-style: "bsd"; indent-tabs-mode: t -*- */
2 /* $NetBSD: getopt.c,v 1.16 1999/12/02 13:15:56 kleink Exp $ */
3
4 /*
5 * Copyright (c) 1987, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #if !defined(HAVE_GETOPT) || !defined(HAVE_UNISTD_H)
38 #if 0
39 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
40 #endif
41
42 #define K5_GETOPT_C
43
44 #include <assert.h>
45 #include <errno.h>
46 #include <stdio.h>
47 #include <string.h>
48 #include "k5-platform.h"
49
50 #define __P(x) x
51 #define _DIAGASSERT(x) assert(x)
52
53 int opterr = 1, /* if error message should be printed */
54 optind = 1, /* index into parent argv vector */
55 optopt; /* character checked for validity */
56 char *optarg; /* argument associated with option */
57
58 static char * _progname __P((char *));
59 int getopt_internal __P((int, char * const *, const char *));
60
61 static char *
_progname(nargv0)62 _progname(nargv0)
63 char * nargv0;
64 {
65 char * tmp;
66
67 _DIAGASSERT(nargv0 != NULL);
68
69 tmp = strrchr(nargv0, '/');
70 if (tmp)
71 tmp++;
72 else
73 tmp = nargv0;
74 return(tmp);
75 }
76
77 #define BADCH (int)'?'
78 #define BADARG (int)':'
79 #define EMSG ""
80
81 /*
82 * getopt --
83 * Parse argc/argv argument vector.
84 */
85 int
getopt(nargc,nargv,ostr)86 getopt(nargc, nargv, ostr)
87 int nargc;
88 char * const nargv[];
89 const char *ostr;
90 {
91 static char *__progname = 0;
92 static char *place = EMSG; /* option letter processing */
93 char *oli; /* option letter list index */
94 __progname = __progname?__progname:_progname(*nargv);
95
96 _DIAGASSERT(nargv != NULL);
97 _DIAGASSERT(ostr != NULL);
98
99 if (!*place) { /* update scanning pointer */
100 if (optind >= nargc || *(place = nargv[optind]) != '-') {
101 place = EMSG;
102 return (-1);
103 }
104 if (place[1] && *++place == '-' /* found "--" */
105 && place[1] == '\0') {
106 ++optind;
107 place = EMSG;
108 return (-1);
109 }
110 } /* option letter okay? */
111 if ((optopt = (int)*place++) == (int)':' ||
112 !(oli = strchr(ostr, optopt))) {
113 /*
114 * if the user didn't specify '-' as an option,
115 * assume it means -1.
116 */
117 if (optopt == (int)'-')
118 return (-1);
119 if (!*place)
120 ++optind;
121 if (opterr && *ostr != ':')
122 (void)fprintf(stderr,
123 "%s: illegal option -- %c\n", __progname, optopt);
124 return (BADCH);
125 }
126 if (*++oli != ':') { /* don't need argument */
127 optarg = NULL;
128 if (!*place)
129 ++optind;
130 }
131 else { /* need an argument */
132 if (*place) /* no white space */
133 optarg = place;
134 else if (nargc <= ++optind) { /* no arg */
135 place = EMSG;
136 if (*ostr == ':')
137 return (BADARG);
138 if (opterr)
139 (void)fprintf(stderr,
140 "%s: option requires an argument -- %c\n",
141 __progname, optopt);
142 return (BADCH);
143 }
144 else /* white space */
145 optarg = nargv[optind];
146 place = EMSG;
147 ++optind;
148 }
149 return (optopt); /* dump back option letter */
150 }
151 #endif /* !defined(HAVE_GETOPT) || !defined(HAVE_UNISTD_H) */
152