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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* Common definitions for preadv and pwritev.
Copyright (C) 2016-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <support/check.h>
#include <support/temp_file.h>
#include <support/support.h>
#include <support/xunistd.h>
static char *temp_filename;
static int temp_fd;
static bool temp_fd_supports_holes;
static int do_test (void);
static void
do_prepare (int argc, char **argv)
{
temp_fd = create_temp_file ("tst-preadvwritev.", &temp_filename);
if (temp_fd == -1)
FAIL_EXIT1 ("cannot create temporary file");
temp_fd_supports_holes = support_descriptor_supports_holes (temp_fd);
}
#define PREPARE do_prepare
#ifndef PREADV
# define PREADV(__fd, __iov, __iovcnt, __offset) \
preadv (__fd, __iov, __iovcnt, __offset)
#endif
#ifndef PWRITEV
# define PWRITEV(__fd, __iov, __iovcnt, __offset) \
pwritev (__fd, __iov, __iovcnt, __offset)
#endif
static __attribute__ ((unused)) void
do_test_without_offset (void)
{
xftruncate (temp_fd, 0);
xwrite (temp_fd, "123", 3);
xlseek (temp_fd, 2, SEEK_SET);
{
struct iovec iov[] =
{
{ (void *) "abc", 3 },
{ (void *) "xyzt", 4 },
};
TEST_COMPARE (PWRITEV (temp_fd, iov, array_length (iov), -1), 7);
}
TEST_COMPARE (xlseek (temp_fd, 0, SEEK_CUR), 9);
xlseek (temp_fd, 1, SEEK_SET);
char buf1[3];
char buf2[2];
{
struct iovec iov[] =
{
{ buf1, sizeof (buf1) },
{ buf2, sizeof (buf2) },
};
TEST_COMPARE (PREADV (temp_fd, iov, array_length (iov), -1),
sizeof (buf1) + sizeof (buf2));
TEST_COMPARE (memcmp ("2ab", buf1, sizeof (buf1)), 0);
TEST_COMPARE (memcmp ("cx", buf2, sizeof (buf2)), 0);
TEST_COMPARE (xlseek (temp_fd, 0, SEEK_CUR), 6);
}
xftruncate (temp_fd, 0);
}
static int
do_test_with_offset (off_t offset)
{
struct iovec iov[2];
ssize_t ret;
char buf1[32];
char buf2[64];
memset (buf1, 0xf0, sizeof buf1);
memset (buf2, 0x0f, sizeof buf2);
/* Write two buffer with 32 and 64 bytes respectively. */
memset (iov, 0, sizeof iov);
iov[0].iov_base = buf1;
iov[0].iov_len = sizeof buf1;
iov[1].iov_base = buf2;
iov[1].iov_len = sizeof buf2;
ret = PWRITEV (temp_fd, iov, 2, offset);
if (ret == -1)
FAIL_RET ("first pwritev returned -1");
if (ret != (sizeof buf1 + sizeof buf2))
FAIL_RET ("first pwritev returned an unexpected value");
ret = PWRITEV (temp_fd, iov, 2, sizeof buf1 + sizeof buf2 + offset);
if (ret == -1)
FAIL_RET ("second pwritev returned -1");
if (ret != (sizeof buf1 + sizeof buf2))
FAIL_RET ("second pwritev returned an unexpected value");
char buf3[32];
char buf4[64];
memset (buf3, 0x0f, sizeof buf3);
memset (buf4, 0xf0, sizeof buf4);
iov[0].iov_base = buf3;
iov[0].iov_len = sizeof buf3;
iov[1].iov_base = buf4;
iov[1].iov_len = sizeof buf4;
/* Now read two buffer with 32 and 64 bytes respectively. */
ret = PREADV (temp_fd, iov, 2, offset);
if (ret == -1)
FAIL_RET ("first preadv returned -1");
if (ret != (sizeof buf3 + sizeof buf4))
FAIL_RET ("first preadv returned an unexpected value");
if (memcmp (buf1, buf3, sizeof buf1) != 0)
FAIL_RET ("first buffer from first preadv different than expected");
if (memcmp (buf2, buf4, sizeof buf2) != 0)
FAIL_RET ("second buffer from first preadv different than expected");
ret = PREADV (temp_fd, iov, 2, sizeof buf3 + sizeof buf4 + offset);
if (ret == -1)
FAIL_RET ("second preadv returned -1");
if (ret != (sizeof buf3 + sizeof buf4))
FAIL_RET ("second preadv returned an unexpected value");
/* And compare the buffers read and written to check if there are equal. */
if (memcmp (buf1, buf3, sizeof buf1) != 0)
FAIL_RET ("first buffer from second preadv different than expected");
if (memcmp (buf2, buf4, sizeof buf2) != 0)
FAIL_RET ("second buffer from second preadv different than expected");
return 0;
}
#include <support/test-driver.c>
|
