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 #include "includes.h"
35 #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)
36
37 #if defined(LIBC_SCCS) && !defined(lint)
38 static char *rcsid = "$OpenBSD: getopt.c,v 1.2 1996/08/19 08:33:32 tholo Exp $";
39 #endif /* LIBC_SCCS and not lint */
40
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44
45 int BSDopterr = 1, /* if error message should be printed */
46 BSDoptind = 1, /* index into parent argv vector */
47 BSDoptopt, /* character checked for validity */
48 BSDoptreset; /* reset getopt */
49 char *BSDoptarg; /* argument associated with option */
50
51 #define BADCH (int)'?'
52 #define BADARG (int)':'
53 #define EMSG ""
54
55 /*
56 * getopt --
57 * Parse argc/argv argument vector.
58 */
59 int
BSDgetopt(nargc,nargv,ostr)60 BSDgetopt(nargc, nargv, ostr)
61 int nargc;
62 char * const *nargv;
63 const char *ostr;
64 {
65 extern char *__progname;
66 static char *place = EMSG; /* option letter processing */
67 char *oli; /* option letter list index */
68
69 if (BSDoptreset || !*place) { /* update scanning pointer */
70 BSDoptreset = 0;
71 if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') {
72 place = EMSG;
73 return (-1);
74 }
75 if (place[1] && *++place == '-') { /* found "--" */
76 ++BSDoptind;
77 place = EMSG;
78 return (-1);
79 }
80 } /* option letter okay? */
81 if ((BSDoptopt = (int)*place++) == (int)':' ||
82 !(oli = strchr(ostr, BSDoptopt))) {
83 /*
84 * if the user didn't specify '-' as an option,
85 * assume it means -1.
86 */
87 if (BSDoptopt == (int)'-')
88 return (-1);
89 if (!*place)
90 ++BSDoptind;
91 if (BSDopterr && *ostr != ':')
92 (void) fprintf(stderr,
93 gettext("%s: illegal option -- %c\n"), __progname,
94 BSDoptopt);
95 return (BADCH);
96 }
97 if (*++oli != ':') { /* don't need argument */
98 BSDoptarg = NULL;
99 if (!*place)
100 ++BSDoptind;
101 } else { /* need an argument */
102 if (*place) /* no white space */
103 BSDoptarg = place;
104 else if (nargc <= ++BSDoptind) { /* no arg */
105 place = EMSG;
106 if (*ostr == ':')
107 return (BADARG);
108 if (BSDopterr)
109 (void) fprintf(stderr,
110 "%s: option requires an argument -- %c\n",
111 __progname, BSDoptopt);
112 return (BADCH);
113 /* white space */
114 } else
115 BSDoptarg = nargv[BSDoptind];
116
117 place = EMSG;
118 ++BSDoptind;
119 }
120 return (BSDoptopt); /* dump back option letter */
121 }
122
123 #endif /* !defined(HAVE_GETOPT) || !defined(HAVE_OPTRESET) */
124