msyslog.c revision 290001 
1#include "config.h"
2
3#include "ntp_stdlib.h"
4
5#include "unity.h"
6
7#ifndef VSNPRINTF_PERCENT_M
8// format_errmsg() is normally private to msyslog.c
9void format_errmsg(char *, size_t, const char *, int);
10#endif
11
12
13void test_msnprintf(void);
14void test_msnprintfLiteralPercentm(void);
15void test_msnprintfBackslashLiteralPercentm(void);
16void test_msnprintfBackslashPercent(void);
17void test_msnprintfHangingPercent(void);
18void test_format_errmsgHangingPercent(void);
19void test_msnprintfNullTarget(void);
20void test_msnprintfTruncate(void);
21
22
23void
24test_msnprintf(void) {
25#define FMT_PREFIX "msyslog.cpp ENOENT: "
26	char	exp_buf[512];
27	char	act_buf[512];
28	int	exp_cnt;
29	int	act_cnt;
30
31	exp_cnt = snprintf(exp_buf, sizeof(exp_buf), FMT_PREFIX "%s",
32			   strerror(ENOENT));
33	errno = ENOENT;
34	act_cnt = msnprintf(act_buf, sizeof(act_buf), FMT_PREFIX "%m");
35
36	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
37	TEST_ASSERT_EQUAL_STRING(exp_buf, act_buf);
38}
39
40void
41test_msnprintfLiteralPercentm(void)
42{
43	char	exp_buf[32];
44	char	act_buf[32];
45	int	exp_cnt;
46	int	act_cnt;
47
48	exp_cnt = snprintf(exp_buf, sizeof(exp_buf), "%%m");
49	errno = ENOENT;
50	act_cnt = msnprintf(act_buf, sizeof(act_buf), "%%m");
51
52	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
53	TEST_ASSERT_EQUAL_STRING(exp_buf, act_buf);
54}
55
56void
57test_msnprintfBackslashLiteralPercentm(void) {
58	char	exp_buf[32];
59	char	act_buf[32];
60	int	exp_cnt;
61	int	act_cnt;
62
63	exp_cnt = snprintf(exp_buf, sizeof(exp_buf), "\%%m");
64	errno = ENOENT;
65	act_cnt = msnprintf(act_buf, sizeof(act_buf), "\%%m");
66
67	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
68	TEST_ASSERT_EQUAL_STRING(exp_buf, act_buf);
69}
70
71void
72test_msnprintfBackslashPercent(void) {
73	char	exp_buf[32];
74	char	act_buf[32];
75	int	exp_cnt;
76	int	act_cnt;
77
78	exp_cnt = snprintf(exp_buf, sizeof(exp_buf), "\%s",
79			   strerror(ENOENT));
80	errno = ENOENT;
81	act_cnt = msnprintf(act_buf, sizeof(act_buf), "\%m");
82
83	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
84	TEST_ASSERT_EQUAL_STRING(exp_buf, act_buf);
85}
86
87void
88test_msnprintfHangingPercent(void) {
89	static char fmt[] = "percent then nul term then non-nul %\0oops!";
90	char exp_buf[64];
91	char act_buf[64];
92	int	exp_cnt;
93	int	act_cnt;
94
95	ZERO(exp_buf);
96	ZERO(act_buf);
97	exp_cnt = snprintf(exp_buf, sizeof(exp_buf), "%s", fmt);
98	act_cnt = msnprintf(act_buf, sizeof(act_buf), "%s", fmt);
99
100	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
101	TEST_ASSERT_EQUAL_STRING(exp_buf, act_buf);
102	TEST_ASSERT_EQUAL_STRING("", act_buf + 1 + strlen(act_buf));
103}
104
105void
106test_format_errmsgHangingPercent(void) {
107#ifndef VSNPRINTF_PERCENT_M
108	static char fmt[] = "percent then nul term then non-nul %\0oops!";
109	char act_buf[64];
110
111	ZERO(act_buf);
112	format_errmsg(act_buf, sizeof(act_buf), fmt, ENOENT);
113
114	TEST_ASSERT_EQUAL_STRING(fmt, act_buf);
115	TEST_ASSERT_EQUAL_STRING("", act_buf + 1 + strlen(act_buf));
116#else
117	TEST_IGNORE_MESSAGE("VSNPRINTF_PERCENT_M is defined")
118#endif
119}
120
121void
122test_msnprintfNullTarget(void) {
123	int	exp_cnt;
124	int	act_cnt;
125
126	exp_cnt = snprintf(NULL, 0, "%d", 123);
127	errno = ENOENT;
128	act_cnt = msnprintf(NULL, 0, "%d", 123);
129
130	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
131}
132
133void
134test_msnprintfTruncate(void) {
135	char	undist[] = "undisturbed";
136	char	exp_buf[512];
137	char	act_buf[512];
138	int	exp_cnt;
139	int	act_cnt;
140
141	memcpy(exp_buf + 3, undist, sizeof(undist));
142	memcpy(act_buf + 3, undist, sizeof(undist));
143	exp_cnt = snprintf(exp_buf, 3, "%s", strerror(ENOENT));
144	errno = ENOENT;
145	act_cnt = msnprintf(act_buf, 3, "%m");
146
147	TEST_ASSERT_EQUAL('\0', exp_buf[2]);
148	TEST_ASSERT_EQUAL('\0', act_buf[2]);
149	TEST_ASSERT_TRUE(act_cnt > 0);
150	TEST_ASSERT_EQUAL(exp_cnt, act_cnt);
151	TEST_ASSERT_EQUAL_STRING(exp_buf, act_buf);
152	TEST_ASSERT_EQUAL_STRING(exp_buf + 3, undist);
153	TEST_ASSERT_EQUAL_STRING(act_buf + 3, undist);
154}
155