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d74671e4 | 1 | /* OPENBSD ORIGINAL: lib/libc/stdlib/getopt.c */ |
2 | ||
1812a662 | 3 | /* |
4 | * Copyright (c) 1987, 1993, 1994 | |
5 | * The Regents of the University of California. All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
3e67f7df | 15 | * 3. Neither the name of the University nor the names of its contributors |
1812a662 | 16 | * may be used to endorse or promote products derived from this software |
17 | * without specific prior written permission. | |
18 | * | |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
29 | * SUCH DAMAGE. | |
30 | */ | |
31 | ||
17962c40 | 32 | #include "includes.h" |
1812a662 | 33 | #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET) |
34 | ||
35 | #if defined(LIBC_SCCS) && !defined(lint) | |
3e67f7df | 36 | static char *rcsid = "$OpenBSD: getopt.c,v 1.5 2003/06/02 20:18:37 millert Exp $"; |
1812a662 | 37 | #endif /* LIBC_SCCS and not lint */ |
38 | ||
39 | #include <stdio.h> | |
40 | #include <stdlib.h> | |
41 | #include <string.h> | |
42 | ||
d76aa6fb | 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 */ | |
1812a662 | 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 | |
cb547f98 | 58 | BSDgetopt(nargc, nargv, ostr) |
1812a662 | 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 | ||
7bb526ce | 67 | if (ostr == NULL) |
68 | return (-1); | |
69 | ||
d76aa6fb | 70 | if (BSDoptreset || !*place) { /* update scanning pointer */ |
71 | BSDoptreset = 0; | |
72 | if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') { | |
1812a662 | 73 | place = EMSG; |
74 | return (-1); | |
75 | } | |
76 | if (place[1] && *++place == '-') { /* found "--" */ | |
d76aa6fb | 77 | ++BSDoptind; |
1812a662 | 78 | place = EMSG; |
79 | return (-1); | |
80 | } | |
81 | } /* option letter okay? */ | |
d76aa6fb | 82 | if ((BSDoptopt = (int)*place++) == (int)':' || |
83 | !(oli = strchr(ostr, BSDoptopt))) { | |
1812a662 | 84 | /* |
85 | * if the user didn't specify '-' as an option, | |
86 | * assume it means -1. | |
87 | */ | |
d76aa6fb | 88 | if (BSDoptopt == (int)'-') |
1812a662 | 89 | return (-1); |
90 | if (!*place) | |
d76aa6fb | 91 | ++BSDoptind; |
92 | if (BSDopterr && *ostr != ':') | |
1812a662 | 93 | (void)fprintf(stderr, |
d76aa6fb | 94 | "%s: illegal option -- %c\n", __progname, BSDoptopt); |
1812a662 | 95 | return (BADCH); |
96 | } | |
97 | if (*++oli != ':') { /* don't need argument */ | |
d76aa6fb | 98 | BSDoptarg = NULL; |
1812a662 | 99 | if (!*place) |
d76aa6fb | 100 | ++BSDoptind; |
1812a662 | 101 | } |
102 | else { /* need an argument */ | |
103 | if (*place) /* no white space */ | |
d76aa6fb | 104 | BSDoptarg = place; |
105 | else if (nargc <= ++BSDoptind) { /* no arg */ | |
1812a662 | 106 | place = EMSG; |
107 | if (*ostr == ':') | |
108 | return (BADARG); | |
d76aa6fb | 109 | if (BSDopterr) |
1812a662 | 110 | (void)fprintf(stderr, |
111 | "%s: option requires an argument -- %c\n", | |
d76aa6fb | 112 | __progname, BSDoptopt); |
1812a662 | 113 | return (BADCH); |
114 | } | |
115 | else /* white space */ | |
d76aa6fb | 116 | BSDoptarg = nargv[BSDoptind]; |
1812a662 | 117 | place = EMSG; |
d76aa6fb | 118 | ++BSDoptind; |
1812a662 | 119 | } |
d76aa6fb | 120 | return (BSDoptopt); /* dump back option letter */ |
1812a662 | 121 | } |
122 | ||
123 | #endif /* !defined(HAVE_GETOPT) || !defined(HAVE_OPTRESET) */ |