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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/* Test of perror() function.
Copyright (C) 2011-2022 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
/* This test intentionally parses stderr. So, we arrange to have fd 10
(outside the range of interesting fd's during the test) set up to
duplicate the original stderr. */
#define BACKUP_STDERR_FILENO 10
#define ASSERT_STREAM myerr
#include "macros.h"
static FILE *myerr;
#define BASE "test-perror2"
int
main (void)
{
/* We change fd 2 later, so save it in fd 10. */
if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
|| (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
return 2;
ASSERT (freopen (BASE ".tmp", "w+", stderr) == stderr);
/* Test that perror does not clobber strerror buffer. */
{
const char *msg1;
const char *msg2;
const char *msg3;
const char *msg4;
char *str1;
char *str2;
char *str3;
char *str4;
msg1 = strerror (ENOENT);
ASSERT (msg1);
str1 = strdup (msg1);
ASSERT (str1);
msg2 = strerror (ERANGE);
ASSERT (msg2);
str2 = strdup (msg2);
ASSERT (str2);
msg3 = strerror (-4);
ASSERT (msg3);
str3 = strdup (msg3);
ASSERT (str3);
msg4 = strerror (1729576);
ASSERT (msg4);
str4 = strdup (msg4);
ASSERT (str4);
errno = EACCES;
perror ("");
errno = -5;
perror ("");
ASSERT (!ferror (stderr));
ASSERT (STREQ (msg4, str4));
free (str1);
free (str2);
free (str3);
free (str4);
}
/* Test that perror uses the same message as strerror. */
{
int errs[] = { EACCES, 0, -3, };
int i;
for (i = 0; i < SIZEOF (errs); i++)
{
char buf[256];
const char *err = strerror (errs[i]);
ASSERT (err);
ASSERT (strlen (err) < sizeof buf);
rewind (stderr);
ASSERT (ftruncate (fileno (stderr), 0) == 0);
errno = errs[i];
perror (NULL);
ASSERT (!ferror (stderr));
rewind (stderr);
ASSERT (fgets (buf, sizeof buf, stderr) == buf);
ASSERT (strstr (buf, err));
}
}
/* Test that perror reports write failure. */
{
ASSERT (freopen (BASE ".tmp", "r", stderr) == stderr);
ASSERT (setvbuf (stderr, NULL, _IONBF, BUFSIZ) == 0);
errno = -1;
ASSERT (!ferror (stderr));
perror (NULL);
#if 0
/* Commented out until cygwin behaves:
https://sourceware.org/ml/newlib/2011/msg00228.html */
ASSERT (errno > 0);
/* Commented out until glibc behaves:
https://sourceware.org/bugzilla/show_bug.cgi?id=12792 */
ASSERT (ferror (stderr));
#endif
}
ASSERT (fclose (stderr) == 0);
ASSERT (remove (BASE ".tmp") == 0);
return 0;
}
|
