1 /* getopt_long and getopt_long_only entry points for GNU getopt.
2 Copyright (C) 1987-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library and is also part of gnulib.
4 Patches to this file should be submitted to both projects.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #ifndef _LIBC
21 # include <config.h>
22 #endif
23
24 #include "getopt.h"
25 #include "getopt_int.h"
26
27 int
28 getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
29 const struct option *long_options, int *opt_index)
30 {
31 return _getopt_internal (argc, (char **) argv, options, long_options,
32 opt_index, 0, 0);
33 }
34
35 int
36 _getopt_long_r (int argc, char **argv, const char *options,
37 const struct option *long_options, int *opt_index,
38 struct _getopt_data *d)
39 {
40 return _getopt_internal_r (argc, argv, options, long_options, opt_index,
41 0, d, 0);
42 }
43
44 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
45 If an option that starts with '-' (not '--') doesn't match a long option,
46 but does match a short option, it is parsed as a short option
47 instead. */
48
49 int
50 getopt_long_only (int argc, char *__getopt_argv_const *argv,
51 const char *options,
52 const struct option *long_options, int *opt_index)
53 {
54 return _getopt_internal (argc, (char **) argv, options, long_options,
55 opt_index, 1, 0);
56 }
57
58 int
59 _getopt_long_only_r (int argc, char **argv, const char *options,
60 const struct option *long_options, int *opt_index,
61 struct _getopt_data *d)
62 {
63 return _getopt_internal_r (argc, argv, options, long_options, opt_index,
64 1, d, 0);
65 }
66
67
68 #ifdef TEST
69
70 #include <stdio.h>
71 #include <stdlib.h>
72
73 int
74 main (int argc, char **argv)
75 {
76 int c;
77 int digit_optind = 0;
78
79 while (1)
80 {
81 int this_option_optind = optind ? optind : 1;
82 int option_index = 0;
83 static const struct option long_options[] =
84 {
85 {"add", 1, 0, 0},
86 {"append", 0, 0, 0},
87 {"delete", 1, 0, 0},
88 {"verbose", 0, 0, 0},
89 {"create", 0, 0, 0},
90 {"file", 1, 0, 0},
91 {0, 0, 0, 0}
92 };
93
94 c = getopt_long (argc, argv, "abc:d:0123456789",
95 long_options, &option_index);
96 if (c == -1)
97 break;
98
99 switch (c)
100 {
101 case 0:
102 printf ("option %s", long_options[option_index].name);
103 if (optarg)
104 printf (" with arg %s", optarg);
105 printf ("\n");
106 break;
107
108 case '0':
109 case '1':
110 case '2':
111 case '3':
112 case '4':
113 case '5':
114 case '6':
115 case '7':
116 case '8':
117 case '9':
118 if (digit_optind != 0 && digit_optind != this_option_optind)
119 printf ("digits occur in two different argv-elements.\n");
120 digit_optind = this_option_optind;
121 printf ("option %c\n", c);
122 break;
123
124 case 'a':
125 printf ("option a\n");
126 break;
127
128 case 'b':
129 printf ("option b\n");
130 break;
131
132 case 'c':
133 printf ("option c with value '%s'\n", optarg);
134 break;
135
136 case 'd':
137 printf ("option d with value '%s'\n", optarg);
138 break;
139
140 case '?':
141 break;
142
143 default:
144 printf ("?? getopt returned character code 0%o ??\n", c);
145 }
146 }
147
148 if (optind < argc)
149 {
150 printf ("non-option ARGV-elements: ");
151 while (optind < argc)
152 printf ("%s ", argv[optind++]);
153 printf ("\n");
154 }
155
156 exit (0);
157 }
158
159 #endif /* TEST */