1
2/*-
3 * SPDX-License-Identifier: BSD-3-Clause
4 *
5 * Copyright 2013 Google Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 *   notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 *   notice, this list of conditions and the following disclaimer in the
16 *   documentation and/or other materials provided with the distribution.
17 * * Neither the name of Google Inc. nor the names of its contributors
18 *   may be used to endorse or promote products derived from this software
19 *   without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
32
33/*
34 * INTRODUCTION
35 *
36 * This plain test program mimics the structure and contents of its
37 * ATF-based counterpart.  It attempts to represent various test cases
38 * in different separate functions and just calls them all from main().
39 *
40 * In reality, plain test programs can be much simpler.  All they have
41 * to do is return 0 on success and non-0 otherwise.
42 */
43
44#include <err.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48
49static void
50snprintf__two_formatters(void)
51{
52	char buffer[128];
53
54	if (snprintf(buffer, sizeof(buffer), "%s, %s!", "Hello",
55	    "tests") <= 0)
56		errx(EXIT_FAILURE, "snprintf with two formatters failed");
57
58	if (strcmp(buffer, "Hello, tests!") != 0)
59		errx(EXIT_FAILURE, "Bad formatting: got %s", buffer);
60}
61
62static void
63snprintf__overflow(void)
64{
65	char buffer[10];
66
67	if (snprintf(buffer, sizeof(buffer), "0123456789abcdef") != 16)
68		errx(EXIT_FAILURE, "snprintf did not return the expected "
69		    "number of characters");
70
71	if (strcmp(buffer, "012345678") != 0)
72		errx(EXIT_FAILURE, "Bad formatting: got %s", buffer);
73}
74
75static void
76fprintf__simple_string(void)
77{
78	FILE *file;
79	char buffer[128];
80	size_t length;
81	const char *contents = "This is a message\n";
82
83	file = fopen("test.txt", "w+");
84	if (fprintf(file, "%s", contents) <= 0)
85		err(EXIT_FAILURE, "fprintf failed to write to file");
86	rewind(file);
87	length = fread(buffer, 1, sizeof(buffer) - 1, file);
88	if (length != strlen(contents))
89		err(EXIT_FAILURE, "fread failed");
90	buffer[length] = '\0';
91	fclose(file);
92
93	if (strcmp(buffer, contents) != 0)
94		errx(EXIT_FAILURE, "Written and read data differ");
95
96	/* Of special note here is that we are NOT deleting the temporary
97	 * files we created in this test.  Kyua takes care of this cleanup
98	 * automatically and tests can (and should) rely on this behavior. */
99}
100
101int
102main(void)
103{
104	/* If you have read the printf_test.c counterpart in the atf/
105	 * directory, you may think that the sequencing of tests below and
106	 * the exposed behavior to the user is very similar.  But you'd be
107	 * wrong.
108	 *
109	 * There are two major differences with this and the ATF version.
110	 * The first is that the code below has no provisions to detect
111	 * failures in one test and continue running the other tests: the
112	 * first failure causes the whole test program to exit.  The second
113	 * is that this particular main() has no arguments: without ATF,
114	 * all test programs may expose a different command-line interface,
115	 * and this is an issue for consistency purposes. */
116	snprintf__two_formatters();
117	snprintf__overflow();
118	fprintf__simple_string();
119
120	return EXIT_SUCCESS;
121}
122