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28f540f4 | 1 | #include <stdio.h> |
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2 | #include <stdlib.h> |
3 | #include <getopt.h> | |
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4 | |
5 | /* Flag set by @samp{--verbose}. */ | |
6 | static int verbose_flag; | |
7 | ||
8 | int | |
9 | main (argc, argv) | |
10 | int argc; | |
11 | char **argv; | |
12 | { | |
13 | int c; | |
14 | ||
15 | while (1) | |
16 | { | |
17 | static struct option long_options[] = | |
18 | { | |
19 | /* These options set a flag. */ | |
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20 | {"verbose", no_argument, &verbose_flag, 1}, |
21 | {"brief", no_argument, &verbose_flag, 0}, | |
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22 | /* These options don't set a flag. |
23 | We distinguish them by their indices. */ | |
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24 | {"add", required_argument, 0, 'a'}, |
25 | {"append", no_argument, 0, 'b'}, | |
26 | {"delete", required_argument, 0, 'd'}, | |
27 | {"create", no_argument, 0, 'c'}, | |
28 | {"file", required_argument, 0, 'f'}, | |
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29 | {0, 0, 0, 0} |
30 | }; | |
31 | /* @code{getopt_long} stores the option index here. */ | |
32 | int option_index = 0; | |
33 | ||
9495793d | 34 | c = getopt_long (argc, argv, "abc:d:f:", |
28f540f4 RM |
35 | long_options, &option_index); |
36 | ||
37 | /* Detect the end of the options. */ | |
38 | if (c == -1) | |
39 | break; | |
40 | ||
41 | switch (c) | |
42 | { | |
43 | case 0: | |
44 | /* If this option set a flag, do nothing else now. */ | |
45 | if (long_options[option_index].flag != 0) | |
46 | break; | |
47 | printf ("option %s", long_options[option_index].name); | |
48 | if (optarg) | |
49 | printf (" with arg %s", optarg); | |
50 | printf ("\n"); | |
51 | break; | |
52 | ||
53 | case 'a': | |
54 | puts ("option -a\n"); | |
55 | break; | |
56 | ||
57 | case 'b': | |
58 | puts ("option -b\n"); | |
59 | break; | |
60 | ||
61 | case 'c': | |
62 | printf ("option -c with value `%s'\n", optarg); | |
63 | break; | |
64 | ||
65 | case 'd': | |
66 | printf ("option -d with value `%s'\n", optarg); | |
67 | break; | |
68 | ||
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69 | case 'f': |
70 | printf ("option -f with value `%s'\n", optarg); | |
71 | break; | |
72 | ||
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73 | case '?': |
74 | /* @code{getopt_long} already printed an error message. */ | |
75 | break; | |
76 | ||
77 | default: | |
78 | abort (); | |
79 | } | |
80 | } | |
81 | ||
82 | /* Instead of reporting @samp{--verbose} | |
83 | and @samp{--brief} as they are encountered, | |
84 | we report the final status resulting from them. */ | |
85 | if (verbose_flag) | |
86 | puts ("verbose flag is set"); | |
87 | ||
88 | /* Print any remaining command line arguments (not options). */ | |
89 | if (optind < argc) | |
90 | { | |
91 | printf ("non-option ARGV-elements: "); | |
92 | while (optind < argc) | |
93 | printf ("%s ", argv[optind++]); | |
94 | putchar ('\n'); | |
95 | } | |
96 | ||
97 | exit (0); | |
98 | } |