summary refs log tree commit diff
path: root/posix/tstgetopt.c
blob: 2258b20770a953e9de08684a6b9c765155b39947 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
#include <unistd.h>
#include <stdio.h>
#include <getopt.h>

int
main (int argc, char **argv)
{
  static const struct option options[] =
    {
      {"required", required_argument, NULL, 'r'},
      {"optional", optional_argument, NULL, 'o'},
      {"none",     no_argument,       NULL, 'n'}
    };
   
  int aflag = 0;
  int bflag = 0;
  char *cvalue = NULL;
  int index;
  int c;

  while ((c = getopt_long (argc, argv, "abc:", options, NULL)) >= 0)
    switch (c)
      {
      case 'a':
	aflag = 1;
	break;
      case 'b':
	bflag = 1;
	break;
      case 'c':
	cvalue = optarg;
	break;
      case '?':
	fputs ("Unknown option.\n", stderr);
	return 1;
      default:
	fprintf (stderr, "This should never happen!\n");
	return 1;

      case 'r':
	printf ("--required %s\n", optarg);
	break;
      case 'o':
	printf ("--optional %s\n", optarg);
	break;
      case 'n':
	puts ("--none");
	break;
      }

  printf ("aflag = %d, bflag = %d, cvalue = %s\n", aflag, bflag, cvalue);

  for (index = optind; index < argc; index++)
    printf ("Non-option argument %s\n", argv[index]);

  return 0;
}