1 /*
2  * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
15  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
16  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
17  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <getopt.h>
29 
30 /*
31  * Simple getopt_long() and getopt_long_only() excerciser.
32  * ENVIRONMENT:
33  *	LONG_ONLY	: use getopt_long_only() (default is getopt_long())
34  *	POSIXLY_CORRECT	: don't permute args
35  */
36 
37 int
38 main(int argc, char **argv)
39 {
40 	int ch, idx, goggles;
41 	int (*gl)(int, char * const *, const char *, const struct option *, int *);
42 	struct option longopts[] = {
43 		{ "force", no_argument, 0, 0 },
44 		{ "fast", no_argument, 0, '1' },
45 		{ "best", no_argument, 0, '9' },
46 		{ "input", required_argument, 0, 'i' },
47 		{ "illiterate", no_argument, 0, 0 },
48 		{ "drinking", required_argument, &goggles, 42 },
49 		{ "help", no_argument, 0, 'h' },
50 		{ 0, 0, 0, 0 },
51 	};
52 
53 	if (getenv("LONG_ONLY")) {
54 		gl = getopt_long_only;
55 		printf("getopt_long_only");
56 	} else {
57 		gl = getopt_long;
58 		printf("getopt_long");
59 	}
60 	if (getenv("POSIXLY_CORRECT"))
61 		printf(" (POSIXLY_CORRECT)");
62 	printf(": ");
63 	for (idx = 1; idx < argc; idx++)
64 		printf("%s ", argv[idx]);
65 	printf("\n");
66 
67 	goggles = 0;
68 	for (;;) {
69 		idx = -1;
70 		ch = gl(argc, argv, "19bf:i:hW;-", longopts, &idx);
71 		if (ch == -1)
72 			break;
73 		switch (ch) {
74 		case 0:
75 		case '1':
76 		case '9':
77 		case 'h':
78 		case 'b':
79 		case '-':
80 			if (idx != -1) {
81 				if (goggles == 42)
82 					printf("option %s, arg %s\n",
83 					    longopts[idx].name, optarg);
84 				else
85 					printf("option %s\n",
86 					    longopts[idx].name);
87 			} else
88 				printf("option %c\n", ch);
89 			break;
90 		case 'f':
91 		case 'i':
92 			if (idx != -1)
93 				printf("option %s, arg %s\n",
94 				    longopts[idx].name, optarg);
95 			else
96 				printf("option %c, arg %s\n", ch, optarg);
97 			break;
98 
99 		case '?':
100 			break;
101 
102 		default:
103 			printf("unexpected return value: %c\n", ch);
104 			break;
105 		}
106 	}
107 	argc -= optind;
108 	argv += optind;
109 
110 	if (argc > 0) {
111 		printf("remaining ARGV: ");
112 		while (argc--)
113 			printf("%s ", *argv++);
114 		printf("\n");
115 	}
116 	printf("\n");
117 
118 	exit (0);
119 }
120