/src/tmux/compat/getopt.c
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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 | 0 | #define BADCH (int)'?' |
45 | 0 | #define BADARG (int)':' |
46 | 0 | #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 | 0 | { |
55 | 0 | static const char *place = EMSG; /* option letter processing */ |
56 | 0 | char *oli; /* option letter list index */ |
57 | |
|
58 | 0 | if (ostr == NULL) |
59 | 0 | return (-1); |
60 | | |
61 | 0 | if (BSDoptreset || !*place) { /* update scanning pointer */ |
62 | 0 | BSDoptreset = 0; |
63 | 0 | if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') { |
64 | 0 | place = EMSG; |
65 | 0 | return (-1); |
66 | 0 | } |
67 | 0 | if (place[1] && *++place == '-') { /* found "--" */ |
68 | 0 | if (place[1]) |
69 | 0 | return (BADCH); |
70 | 0 | ++BSDoptind; |
71 | 0 | place = EMSG; |
72 | 0 | return (-1); |
73 | 0 | } |
74 | 0 | } /* option letter okay? */ |
75 | 0 | if ((BSDoptopt = (int)*place++) == (int)':' || |
76 | 0 | !(oli = strchr(ostr, BSDoptopt))) { |
77 | | /* |
78 | | * if the user didn't specify '-' as an option, |
79 | | * assume it means -1. |
80 | | */ |
81 | 0 | if (BSDoptopt == (int)'-') |
82 | 0 | return (-1); |
83 | 0 | if (!*place) |
84 | 0 | ++BSDoptind; |
85 | 0 | if (BSDopterr && *ostr != ':') |
86 | 0 | (void)fprintf(stderr, |
87 | 0 | "%s: unknown option -- %c\n", getprogname(), |
88 | 0 | BSDoptopt); |
89 | 0 | return (BADCH); |
90 | 0 | } |
91 | 0 | if (*++oli != ':') { /* don't need argument */ |
92 | 0 | BSDoptarg = NULL; |
93 | 0 | if (!*place) |
94 | 0 | ++BSDoptind; |
95 | 0 | } |
96 | 0 | else { /* need an argument */ |
97 | 0 | if (*place) /* no white space */ |
98 | 0 | BSDoptarg = (char *)place; |
99 | 0 | else if (nargc <= ++BSDoptind) { /* no arg */ |
100 | 0 | place = EMSG; |
101 | 0 | if (*ostr == ':') |
102 | 0 | return (BADARG); |
103 | 0 | if (BSDopterr) |
104 | 0 | (void)fprintf(stderr, |
105 | 0 | "%s: option requires an argument -- %c\n", |
106 | 0 | getprogname(), BSDoptopt); |
107 | 0 | return (BADCH); |
108 | 0 | } |
109 | 0 | else /* white space */ |
110 | 0 | BSDoptarg = nargv[BSDoptind]; |
111 | 0 | place = EMSG; |
112 | 0 | ++BSDoptind; |
113 | 0 | } |
114 | 0 | return (BSDoptopt); /* dump back option letter */ |
115 | 0 | } |