mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 00:01:12 +00:00
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* Common definitions for pread and pwrite.
|
|
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 <errno.h>
|
|
#include <error.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
static void do_prepare (void);
|
|
#define PREPARE(argc, argv) do_prepare ()
|
|
static int do_test (void);
|
|
#define TEST_FUNCTION do_test ()
|
|
|
|
/* We might need a bit longer timeout. */
|
|
#define TIMEOUT 20 /* sec */
|
|
|
|
/* This defines the `main' function and some more. */
|
|
#include <test-skeleton.c>
|
|
|
|
/* These are for the temporary file we generate. */
|
|
static char *name;
|
|
static int fd;
|
|
|
|
static void
|
|
do_prepare (void)
|
|
{
|
|
fd = create_temp_file ("tst-preadwrite.", &name);
|
|
if (fd == -1)
|
|
error (EXIT_FAILURE, errno, "cannot create temporary file");
|
|
}
|
|
|
|
|
|
static ssize_t
|
|
do_test_with_offset (off_t offset)
|
|
{
|
|
char buf[1000];
|
|
char res[1000];
|
|
int i;
|
|
ssize_t ret;
|
|
|
|
memset (buf, '\0', sizeof (buf));
|
|
memset (res, '\xff', sizeof (res));
|
|
|
|
if (write (fd, buf, sizeof (buf)) != sizeof (buf))
|
|
error (EXIT_FAILURE, errno, "during write");
|
|
|
|
for (i = 100; i < 200; ++i)
|
|
buf[i] = i;
|
|
ret = pwrite (fd, buf + 100, 100, offset + 100);
|
|
if (ret == -1)
|
|
error (EXIT_FAILURE, errno, "during pwrite");
|
|
|
|
for (i = 450; i < 600; ++i)
|
|
buf[i] = i;
|
|
ret = pwrite (fd, buf + 450, 150, offset + 450);
|
|
if (ret == -1)
|
|
error (EXIT_FAILURE, errno, "during pwrite");
|
|
|
|
ret = pread (fd, res, sizeof (buf) - 50, offset + 50);
|
|
if (ret == -1)
|
|
error (EXIT_FAILURE, errno, "during pread");
|
|
|
|
if (memcmp (buf + 50, res, ret) != 0)
|
|
{
|
|
printf ("error: read of pread != write of pwrite\n");
|
|
return -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|