1 #include <getopt.h>
2 #include <stdio.h>
3 #include <string.h>
4 #include <unistd.h>
5
6 int
main(int argc,char ** argv)7 main (int argc, char **argv)
8 {
9 static const struct option options[] =
10 {
11 {"required", required_argument, NULL, 'r'},
12 {"optional", optional_argument, NULL, 'o'},
13 {"none", no_argument, NULL, 'n'},
14 {"color", no_argument, NULL, 'C'},
15 {"colour", no_argument, NULL, 'C'},
16 {NULL, 0, NULL, 0 }
17 };
18
19 int aflag = 0;
20 int bflag = 0;
21 char *cvalue = NULL;
22 int Cflag = 0;
23 int nflag = 0;
24 int index;
25 int c;
26 int result = 0;
27
28 while ((c = getopt_long (argc, argv, "abc:", options, NULL)) >= 0)
29 switch (c)
30 {
31 case 'a':
32 aflag = 1;
33 break;
34 case 'b':
35 bflag = 1;
36 break;
37 case 'c':
38 cvalue = optarg;
39 break;
40 case 'C':
41 ++Cflag;
42 break;
43 case '?':
44 fputs ("Unknown option.\n", stderr);
45 return 1;
46 default:
47 fprintf (stderr, "This should never happen!\n");
48 return 1;
49
50 case 'r':
51 printf ("--required %s\n", optarg);
52 result |= strcmp (optarg, "foobar") != 0;
53 break;
54 case 'o':
55 printf ("--optional %s\n", optarg);
56 result |= optarg == NULL || strcmp (optarg, "bazbug") != 0;
57 break;
58 case 'n':
59 puts ("--none");
60 nflag = 1;
61 break;
62 }
63
64 printf ("aflag = %d, bflag = %d, cvalue = %s, Cflags = %d, nflag = %d\n",
65 aflag, bflag, cvalue, Cflag, nflag);
66
67 result |= (aflag != 1 || bflag != 1 || cvalue == NULL
68 || strcmp (cvalue, "foobar") != 0 || Cflag != 3 || nflag != 1);
69
70 for (index = optind; index < argc; index++)
71 printf ("Non-option argument %s\n", argv[index]);
72
73 result |= optind + 1 != argc || strcmp (argv[optind], "random") != 0;
74
75 return result;
76 }
77