about summary refs log tree commit diff
path: root/misc/tst-preadvwritev-common.c
blob: 5540dfb04d0f42d4c59492c46cb8633151a2e742 (plain) (blame)
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
/* Common definitions for preadv and pwritev.
   Copyright (C) 2016-2017 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
   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/uio.h>
#include <sys/stat.h>

#include <support/check.h>
#include <support/temp_file.h>

static char *temp_filename;
static int temp_fd;

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");
}
#define PREPARE do_prepare

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>