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