1 | /* Example of Parsing Arguments with getopt. |
2 | Copyright (C) 1991-2022 Free Software Foundation, Inc. |
3 | |
4 | This program is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU General Public License |
6 | as published by the Free Software Foundation; either version 2 |
7 | of the License, or (at your option) any later version. |
8 | |
9 | This program is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU General Public License |
15 | along with this program; if not, see <https://www.gnu.org/licenses/>. |
16 | */ |
17 | |
18 | /*@group*/ |
19 | #include <ctype.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <unistd.h> |
23 | |
24 | int |
25 | main (int argc, char **argv) |
26 | { |
27 | int aflag = 0; |
28 | int bflag = 0; |
29 | char *cvalue = NULL; |
30 | int index; |
31 | int c; |
32 | |
33 | opterr = 0; |
34 | /*@end group*/ |
35 | |
36 | /*@group*/ |
37 | while ((c = getopt (argc: argc, argv: argv, shortopts: "abc:" )) != -1) |
38 | switch (c) |
39 | { |
40 | case 'a': |
41 | aflag = 1; |
42 | break; |
43 | case 'b': |
44 | bflag = 1; |
45 | break; |
46 | case 'c': |
47 | cvalue = optarg; |
48 | break; |
49 | case '?': |
50 | if (optopt == 'c') |
51 | fprintf (stderr, "Option -%c requires an argument.\n" , optopt); |
52 | else if (isprint (optopt)) |
53 | fprintf (stderr, "Unknown option `-%c'.\n" , optopt); |
54 | else |
55 | fprintf (stderr, |
56 | "Unknown option character `\\x%x'.\n" , |
57 | optopt); |
58 | return 1; |
59 | default: |
60 | abort (); |
61 | } |
62 | /*@end group*/ |
63 | |
64 | /*@group*/ |
65 | printf (format: "aflag = %d, bflag = %d, cvalue = %s\n" , |
66 | aflag, bflag, cvalue); |
67 | |
68 | for (index = optind; index < argc; index++) |
69 | printf (format: "Non-option argument %s\n" , argv[index]); |
70 | return 0; |
71 | } |
72 | /*@end group*/ |
73 | |