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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /* OPENBSD ORIGINAL: lib/libc/stdlib/getopt.c */
31
32 #include "includes.h"
33 #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)
34
35 #if defined(LIBC_SCCS) && !defined(lint)
36 static char *rcsid = "$OpenBSD: getopt.c,v 1.5 2003/06/02 20:18:37 millert Exp $";
37 #endif /* LIBC_SCCS and not lint */
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42
43 int BSDopterr = 1, /* if error message should be printed */
44 BSDoptind = 1, /* index into parent argv vector */
45 BSDoptopt, /* character checked for validity */
46 BSDoptreset; /* reset getopt */
47 char *BSDoptarg; /* 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
BSDgetopt(nargc,nargv,ostr)58 BSDgetopt(nargc, nargv, ostr)
59 int nargc;
60 char * const *nargv;
61 const char *ostr;
62 {
63 extern char *__progname;
64 static char *place = EMSG; /* option letter processing */
65 char *oli; /* option letter list index */
66
67 if (ostr == NULL)
68 return (-1);
69
70 if (BSDoptreset || !*place) { /* update scanning pointer */
71 BSDoptreset = 0;
72 if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') {
73 place = EMSG;
74 return (-1);
75 }
76 if (place[1] && *++place == '-') { /* found "--" */
77 ++BSDoptind;
78 place = EMSG;
79 return (-1);
80 }
81 } /* option letter okay? */
82 if ((BSDoptopt = (int)*place++) == (int)':' ||
83 !(oli = strchr(ostr, BSDoptopt))) {
84 /*
85 * if the user didn't specify '-' as an option,
86 * assume it means -1.
87 */
88 if (BSDoptopt == (int)'-')
89 return (-1);
90 if (!*place)
91 ++BSDoptind;
92 if (BSDopterr && *ostr != ':')
93 (void)fprintf(stderr,
94 "%s: illegal option -- %c\n", __progname, BSDoptopt);
95 return (BADCH);
96 }
97 if (*++oli != ':') { /* don't need argument */
98 BSDoptarg = NULL;
99 if (!*place)
100 ++BSDoptind;
101 }
102 else { /* need an argument */
103 if (*place) /* no white space */
104 BSDoptarg = place;
105 else if (nargc <= ++BSDoptind) { /* no arg */
106 place = EMSG;
107 if (*ostr == ':')
108 return (BADARG);
109 if (BSDopterr)
110 (void)fprintf(stderr,
111 "%s: option requires an argument -- %c\n",
112 __progname, BSDoptopt);
113 return (BADCH);
114 }
115 else /* white space */
116 BSDoptarg = nargv[BSDoptind];
117 place = EMSG;
118 ++BSDoptind;
119 }
120 return (BSDoptopt); /* dump back option letter */
121 }
122
123 #endif /* !defined(HAVE_GETOPT) || !defined(HAVE_OPTRESET) */
124