/* Tests for copy_file_range.
Copyright (C) 2017-2018 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 <array_length.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libgen.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/namespace.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/test-driver.h>
#include <support/xunistd.h>
#ifdef CLONE_NEWNS
# include <sys/mount.h>
#endif
/* Boolean flags which indicate whether to use pointers with explicit
output flags. */
static int do_inoff;
static int do_outoff;
/* Name and descriptors of the input files. Files are truncated and
reopened (with O_RDWR) between tests. */
static char *infile;
static int infd;
static char *outfile;
static int outfd;
/* Like the above, but on a different file system. xdevfile can be
NULL if no suitable file system has been found. */
static char *xdevfile;
/* Input and output offsets. Set according to do_inoff and do_outoff
before the test. The offsets themselves are always set to
zero. */
static off64_t inoff;
static off64_t *pinoff;
static off64_t outoff;
static off64_t *poutoff;
/* These are a collection of copy sizes used in tests. The selection
takes into account that the fallback implementation uses an
internal buffer of 8192 bytes. */
enum { maximum_size = 99999 };
static const int typical_sizes[] =
{ 0, 1, 2, 3, 1024, 2048, 4096, 8191, 8192, 8193, 16383, 16384, 16385,
maximum_size };
/* The random contents of this array can be used as a pattern to check
for correct write operations. */
static unsigned char random_data[maximum_size];
/* The size chosen by the test harness. */
static int current_size;
/* Maximum writable file offset. Updated by find_maximum_offset
below. */
static off64_t maximum_offset;
/* Error code when crossing the offset. */
static int maximum_offset_errno;
/* If true: Writes which cross the limit will fail. If false: Writes
which cross the limit will result in a partial write. */
static bool maximum_offset_hard_limit;
/* Fills maximum_offset etc. above. Truncates outfd as a side
effect. */
static void
find_maximum_offset (void)
{
xftruncate (outfd, 0);
if (maximum_offset != 0)
return;
uint64_t upper = -1;
upper >>= 1; /* Maximum of off64_t. */
TEST_VERIFY ((off64_t) upper > 0);
TEST_VERIFY ((off64_t) (upper + 1) < 0);
if (lseek64 (outfd, upper, SEEK_SET) >= 0)
{
if (write (outfd, "", 1) == 1)
FAIL_EXIT1 ("created a file larger than the off64_t range");
}
uint64_t lower = 1024 * 1024; /* A reasonable minimum file size. */
/* Loop invariant: writing at lower succeeds, writing at upper fails. */
while (lower + 1 < upper)
{
uint64_t middle = (lower + upper) / 2;
if (test_verbose > 0)
printf ("info: %s: remaining test range %" PRIu64 " .. %" PRIu64
", probe at %" PRIu64 "\n", __func__, lower, upper, middle);
xftruncate (outfd, 0);
if (lseek64 (outfd, middle, SEEK_SET) >= 0
&& write (outfd, "", 1) == 1)
lower = middle;
else
upper = middle;
}
TEST_VERIFY (lower + 1 == upper);
maximum_offset = lower;
printf ("info: maximum writable file offset: %" PRIu64 " (%" PRIx64 ")\n",
lower, lower);
/* Check that writing at the valid offset actually works. */
xftruncate (outfd, 0);
xlseek (outfd, lower, SEEK_SET);
TEST_COMPARE (write (outfd, "", 1), 1);
/* Cross the boundary with a two-byte write. This can either result
in a short write, or a failure. */
xlseek (outfd, lower, SEEK_SET);
ssize_t ret = write (outfd, " ", 2);
if (ret < 0)
{
maximum_offset_errno = errno;
maximum_offset_hard_limit = true;
}
else
maximum_offset_hard_limit = false;
/* Check that writing at the next offset actually fails. This also
obtains the expected errno value. */
xftruncate (outfd, 0);
const char *action;
if (lseek64 (outfd, lower + 1, SEEK_SET) != 0)
{
if (write (outfd, "", 1) != -1)
FAIL_EXIT1 ("write to impossible offset %" PRIu64 " succeeded",
lower + 1);
action = "writing";
int errno_copy = errno;
if (maximum_offset_hard_limit)
TEST_COMPARE (errno_copy, maximum_offset_errno);
else
maximum_offset_errno = errno_copy;
}
else
{
action = "seeking";
maximum_offset_errno = errno;
}
printf ("info: %s out of range fails with %m (%d)\n",
action, maximum_offset_errno);
xftruncate (outfd, 0);
xlseek (outfd, 0, SEEK_SET);
}
/* Perform a copy of a file. */
static void
simple_file_copy (void)
{
xwrite (infd, random_data, current_size);
int length;
int in_skipped; /* Expected skipped bytes in input. */
if (do_inoff)
{
xlseek (infd, 1, SEEK_SET);
inoff = 2;
length = current_size - 3;
in_skipped = 2;
}
else
{
xlseek (infd, 3, SEEK_SET);
length = current_size - 5;
in_skipped = 3;
}
int out_skipped; /* Expected skipped bytes before the written data. */
if (do_outoff)
{
xlseek (outfd, 4, SEEK_SET);
outoff = 5;
out_skipped = 5;
}
else
{
xlseek (outfd, 6, SEEK_SET);
length = current_size - 6;
out_skipped = 6;
}
if (length < 0)
length = 0;
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
length, 0), length);
if (do_inoff)
{
TEST_COMPARE (inoff, 2 + length);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 3 + length);
if (do_outoff)
{
TEST_COMPARE (outoff, 5 + length);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 4);
}
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 6 + length);
struct stat64 st;
xfstat (outfd, &st);
if (length > 0)
TEST_COMPARE (st.st_size, out_skipped + length);
else
{
/* If we did not write anything, we also did not add any
padding. */
TEST_COMPARE (st.st_size, 0);
return;
}
xlseek (outfd, 0, SEEK_SET);
char *bytes = xmalloc (st.st_size);
TEST_COMPARE (read (outfd, bytes, st.st_size), st.st_size);
for (int i = 0; i < out_skipped; ++i)
TEST_COMPARE (bytes[i], 0);
TEST_VERIFY (memcmp (bytes + out_skipped, random_data + in_skipped,
length) == 0);
free (bytes);
}
/* Test that reading from a pipe willfails. */
static void
pipe_as_source (void)
{
int pipefds[2];
xpipe (pipefds);
for (int length = 0; length < 2; ++length)
{
if (test_verbose > 0)
printf ("info: %s: length=%d\n", __func__, length);
/* Make sure that there is something to copy in the pipe. */
xwrite (pipefds[1], "@", 1);
TEST_COMPARE (copy_file_range (pipefds[0], pinoff, outfd, poutoff,
length, 0), -1);
/* Linux 4.10 and later return EINVAL. Older kernels return
EXDEV. */
TEST_VERIFY (errno == EINVAL || errno == EXDEV);
TEST_COMPARE (inoff, 0);
TEST_COMPARE (outoff, 0);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
/* Make sure that nothing was read. */
char buf = 'A';
TEST_COMPARE (read (pipefds[0], &buf, 1), 1);
TEST_COMPARE (buf, '@');
}
xclose (pipefds[0]);
xclose (pipefds[1]);
}
/* Test that writing to a pipe fails. */
static void
pipe_as_destination (void)
{
/* Make sure that there is something to read in the input file. */
xwrite (infd, "abc", 3);
xlseek (infd, 0, SEEK_SET);
int pipefds[2];
xpipe (pipefds);
for (int length = 0; length < 2; ++length)
{
if (test_verbose > 0)
printf ("info: %s: length=%d\n", __func__, length);
TEST_COMPARE (copy_file_range (infd, pinoff, pipefds[1], poutoff,
length, 0), -1);
/* Linux 4.10 and later return EINVAL. Older kernels return
EXDEV. */
TEST_VERIFY (errno == EINVAL || errno == EXDEV);
TEST_COMPARE (inoff, 0);
TEST_COMPARE (outoff, 0);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
/* Make sure that nothing was written. */
struct pollfd pollfd = { .fd = pipefds[0], .events = POLLIN, };
TEST_COMPARE (poll (&pollfd, 1, 0), 0);
}
xclose (pipefds[0]);
xclose (pipefds[1]);
}
/* Test a write failure after (potentially) writing some bytes.
Failure occurs near the start of the buffer. */
static void
delayed_write_failure_beginning (void)
{
/* We need to write something to provoke the error. */
if (current_size == 0)
return;
xwrite (infd, random_data, sizeof (random_data));
xlseek (infd, 0, SEEK_SET);
/* Write failure near the start. The actual error code varies among
file systems. */
find_maximum_offset ();
off64_t where = maximum_offset;
if (current_size == 1)
++where;
outoff = where;
if (do_outoff)
xlseek (outfd, 1, SEEK_SET);
else
xlseek (outfd, where, SEEK_SET);
if (maximum_offset_hard_limit || where > maximum_offset)
{
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0), -1);
TEST_COMPARE (errno, maximum_offset_errno);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
TEST_COMPARE (inoff, 0);
if (do_outoff)
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 1);
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), where);
TEST_COMPARE (outoff, where);
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, 0);
}
else
{
/* The offset is not a hard limit. This means we write one
byte. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0), 1);
if (do_inoff)
{
TEST_COMPARE (inoff, 1);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
}
else
{
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1);
TEST_COMPARE (inoff, 0);
}
if (do_outoff)
{
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 1);
TEST_COMPARE (outoff, where + 1);
}
else
{
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), where + 1);
TEST_COMPARE (outoff, where);
}
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, where + 1);
}
}
/* Test a write failure after (potentially) writing some bytes.
Failure occurs near the end of the buffer. */
static void
delayed_write_failure_end (void)
{
if (current_size <= 1)
/* This would be same as the first test because there is not
enough data to write to make a difference. */
return;
xwrite (infd, random_data, sizeof (random_data));
xlseek (infd, 0, SEEK_SET);
find_maximum_offset ();
off64_t where = maximum_offset - current_size + 1;
if (current_size == sizeof (random_data))
/* Otherwise we do not reach the non-writable byte. */
++where;
outoff = where;
if (do_outoff)
xlseek (outfd, 1, SEEK_SET);
else
xlseek (outfd, where, SEEK_SET);
ssize_t ret = copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0);
if (ret < 0)
{
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, maximum_offset_errno);
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, 0);
}
else
{
/* The first copy succeeded. This happens in the emulation
because the internal buffer of limited size does not
necessarily cross the off64_t boundary on the first write
operation. */
if (test_verbose > 0)
printf ("info: copy_file_range (%zu) returned %zd\n",
sizeof (random_data), ret);
TEST_VERIFY (ret > 0);
TEST_VERIFY (ret < maximum_size);
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, where + ret);
if (do_inoff)
{
TEST_COMPARE (inoff, ret);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), ret);
char *buffer = xmalloc (ret);
TEST_COMPARE (pread64 (outfd, buffer, ret, where), ret);
TEST_VERIFY (memcmp (buffer, random_data, ret) == 0);
free (buffer);
/* The second copy fails. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0), -1);
TEST_COMPARE (errno, maximum_offset_errno);
}
}
/* Test a write failure across devices. */
static void
cross_device_failure (void)
{
if (xdevfile == NULL)
/* Subtest not supported due to missing cross-device file. */
return;
/* We need something to write. */
xwrite (infd, random_data, sizeof (random_data));
xlseek (infd, 0, SEEK_SET);
int xdevfd = xopen (xdevfile, O_RDWR | O_LARGEFILE, 0);
TEST_COMPARE (copy_file_range (infd, pinoff, xdevfd, poutoff,
current_size, 0), -1);
TEST_COMPARE (errno, EXDEV);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
struct stat64 st;
xfstat (xdevfd, &st);
TEST_COMPARE (st.st_size, 0);
xclose (xdevfd);
}
/* Try to exercise ENOSPC behavior with a tempfs file system (so that
we do not have to fill up a regular file system to get the error).
This function runs in a subprocess, so that we do not change the
mount namespace of the actual test process. */
static void
enospc_failure_1 (void *closure)
{
#ifdef CLONE_NEWNS
support_become_root ();
/* Make sure that we do not alter the file system mounts of the
parents. */
if (! support_enter_mount_namespace ())
{
printf ("warning: ENOSPC test skipped\n");
return;
}
char *mountpoint = closure;
if (mount ("none", mountpoint, "tmpfs", MS_NODEV | MS_NOEXEC,
"size=500k") != 0)
{
printf ("warning: could not mount tmpfs at %s: %m\n", mountpoint);
return;
}
/* The source file must reside on the same file system. */
char *intmpfsfile = xasprintf ("%s/%s", mountpoint, "in");
int intmpfsfd = xopen (intmpfsfile, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
xwrite (intmpfsfd, random_data, sizeof (random_data));
xlseek (intmpfsfd, 1, SEEK_SET);
inoff = 1;
char *outtmpfsfile = xasprintf ("%s/%s", mountpoint, "out");
int outtmpfsfd = xopen (outtmpfsfile, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
/* Fill the file with data until ENOSPC is reached. */
while (true)
{
ssize_t ret = write (outtmpfsfd, random_data, sizeof (random_data));
if (ret < 0 && errno != ENOSPC)
FAIL_EXIT1 ("write to %s: %m", outtmpfsfile);
if (ret < sizeof (random_data))
break;
}
TEST_COMPARE (write (outtmpfsfd, "", 1), -1);
TEST_COMPARE (errno, ENOSPC);
off64_t maxsize = xlseek (outtmpfsfd, 0, SEEK_CUR);
TEST_VERIFY_EXIT (maxsize > sizeof (random_data));
/* Constructed the expected file contents. */
char *expected = xmalloc (maxsize);
TEST_COMPARE (pread64 (outtmpfsfd, expected, maxsize, 0), maxsize);
/* Go back a little, so some bytes can be written. */
enum { offset = 20000 };
TEST_VERIFY_EXIT (offset < maxsize);
TEST_VERIFY_EXIT (offset < sizeof (random_data));
memcpy (expected + maxsize - offset, random_data + 1, offset);
if (do_outoff)
{
outoff = maxsize - offset;
xlseek (outtmpfsfd, 2, SEEK_SET);
}
else
xlseek (outtmpfsfd, -offset, SEEK_CUR);
/* First call is expected to succeed because we made room for some
bytes. */
TEST_COMPARE (copy_file_range (intmpfsfd, pinoff, outtmpfsfd, poutoff,
maximum_size, 0), offset);
if (do_inoff)
{
TEST_COMPARE (inoff, 1 + offset);
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1);
}
else
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1 + offset);
if (do_outoff)
{
TEST_COMPARE (outoff, maxsize);
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), maxsize);
struct stat64 st;
xfstat (outtmpfsfd, &st);
TEST_COMPARE (st.st_size, maxsize);
char *actual = xmalloc (st.st_size);
TEST_COMPARE (pread64 (outtmpfsfd, actual, st.st_size, 0), st.st_size);
TEST_VERIFY (memcmp (expected, actual, maxsize) == 0);
/* Second call should fail with ENOSPC. */
TEST_COMPARE (copy_file_range (intmpfsfd, pinoff, outtmpfsfd, poutoff,
maximum_size, 0), -1);
TEST_COMPARE (errno, ENOSPC);
/* Offsets should be unchanged. */
if (do_inoff)
{
TEST_COMPARE (inoff, 1 + offset);
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1);
}
else
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1 + offset);
if (do_outoff)
{
TEST_COMPARE (outoff, maxsize);
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), maxsize);
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_END), maxsize);
TEST_COMPARE (pread64 (outtmpfsfd, actual, maxsize, 0), maxsize);
TEST_VERIFY (memcmp (expected, actual, maxsize) == 0);
free (actual);
free (expected);
xclose (intmpfsfd);
xclose (outtmpfsfd);
free (intmpfsfile);
free (outtmpfsfile);
#else /* !CLONE_NEWNS */
puts ("warning: ENOSPC test skipped (no mount namespaces)");
#endif
}
/* Call enospc_failure_1 in a subprocess. */
static void
enospc_failure (void)
{
char *mountpoint
= support_create_temp_directory ("tst-copy_file_range-enospc-");
support_isolate_in_subprocess (enospc_failure_1, mountpoint);
free (mountpoint);
}
/* The target file descriptor must have O_APPEND enabled. */
static void
oappend_failure (void)
{
/* Add data, to make sure we do not fail because there is
insufficient input data. */
xwrite (infd, random_data, current_size);
xlseek (infd, 0, SEEK_SET);
xclose (outfd);
outfd = xopen (outfile, O_RDWR | O_APPEND, 0);
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
current_size, 0), -1);
TEST_COMPARE (errno, EBADF);
}
/* Test that a short input file results in a shortened copy. */
static void
short_copy (void)
{
if (current_size == 0)
/* Nothing to shorten. */
return;
/* Two subtests, one with offset 0 and current_size - 1 bytes, and
another one with current_size bytes, but offset 1. */
for (int shift = 0; shift < 2; ++shift)
{
if (test_verbose > 0)
printf ("info: shift=%d\n", shift);
xftruncate (infd, 0);
xlseek (infd, 0, SEEK_SET);
xwrite (infd, random_data, current_size - !shift);
if (do_inoff)
{
inoff = shift;
xlseek (infd, 2, SEEK_SET);
}
else
{
inoff = 3;
xlseek (infd, shift, SEEK_SET);
}
ftruncate (outfd, 0);
xlseek (outfd, 0, SEEK_SET);
outoff = 0;
/* First call copies current_size - 1 bytes. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
current_size, 0), current_size - 1);
char *buffer = xmalloc (current_size);
TEST_COMPARE (pread64 (outfd, buffer, current_size, 0),
current_size - 1);
TEST_VERIFY (memcmp (buffer, random_data + shift, current_size - 1)
== 0);
free (buffer);
if (do_inoff)
{
TEST_COMPARE (inoff, current_size - 1 + shift);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), current_size - 1 + shift);
if (do_outoff)
{
TEST_COMPARE (outoff, current_size - 1);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
}
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), current_size - 1);
/* First call copies zero bytes. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
current_size, 0), 0);
/* And the offsets are unchanged. */
if (do_inoff)
{
TEST_COMPARE (inoff, current_size - 1 + shift);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), current_size - 1 + shift);
if (do_outoff)
{
TEST_COMPARE (outoff, current_size - 1);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
}
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), current_size - 1);
}
}
/* A named test function. */
struct test_case
{
const char *name;
void (*func) (void);
bool sizes; /* If true, call the test with different current_size values. */
};
/* The available test cases. */
static struct test_case tests[] =
{
{ "simple_file_copy", simple_file_copy, .sizes = true },
{ "pipe_as_source", pipe_as_source, },
{ "pipe_as_destination", pipe_as_destination, },
{ "delayed_write_failure_beginning", delayed_write_failure_beginning,
.sizes = true },
{ "delayed_write_failure_end", delayed_write_failure_end, .sizes = true },
{ "cross_device_failure", cross_device_failure, .sizes = true },
{ "enospc_failure", enospc_failure, },
{ "oappend_failure", oappend_failure, .sizes = true },
{ "short_copy", short_copy, .sizes = true },
};
static int
do_test (void)
{
for (unsigned char *p = random_data; p < array_end (random_data); ++p)
*p = rand () >> 24;
infd = create_temp_file ("tst-copy_file_range-in-", &infile);
xclose (create_temp_file ("tst-copy_file_range-out-", &outfile));
/* Try to find a different directory from the default input/output
file. */
{
struct stat64 instat;
xfstat (infd, &instat);
static const char *const candidates[] =
{ NULL, "/var/tmp", "/dev/shm" };
for (const char *const *c = candidates; c < array_end (candidates); ++c)
{
const char *path = *c;
char *to_free = NULL;
if (path == NULL)
{
to_free = xreadlink ("/proc/self/exe");
path = dirname (to_free);
}
struct stat64 cstat;
xstat (path, &cstat);
if (cstat.st_dev == instat.st_dev)
{
free (to_free);
continue;
}
printf ("info: using alternate temporary files directory: %s\n", path);
xdevfile = xasprintf ("%s/tst-copy_file_range-xdev-XXXXXX", path);
free (to_free);
break;
}
if (xdevfile != NULL)
{
int xdevfd = mkstemp (xdevfile);
if (xdevfd < 0)
FAIL_EXIT1 ("mkstemp (\"%s\"): %m", xdevfile);
struct stat64 xdevst;
xfstat (xdevfd, &xdevst);
TEST_VERIFY (xdevst.st_dev != instat.st_dev);
add_temp_file (xdevfile);
xclose (xdevfd);
}
else
puts ("warning: no alternate directory on different file system found");
}
xclose (infd);
for (do_inoff = 0; do_inoff < 2; ++do_inoff)
for (do_outoff = 0; do_outoff < 2; ++do_outoff)
for (struct test_case *test = tests; test < array_end (tests); ++test)
for (const int *size = typical_sizes;
size < array_end (typical_sizes); ++size)
{
current_size = *size;
if (test_verbose > 0)
printf ("info: %s do_inoff=%d do_outoff=%d current_size=%d\n",
test->name, do_inoff, do_outoff, current_size);
inoff = 0;
if (do_inoff)
pinoff = &inoff;
else
pinoff = NULL;
outoff = 0;
if (do_outoff)
poutoff = &outoff;
else
poutoff = NULL;
infd = xopen (infile, O_RDWR | O_LARGEFILE, 0);
xftruncate (infd, 0);
outfd = xopen (outfile, O_RDWR | O_LARGEFILE, 0);
xftruncate (outfd, 0);
test->func ();
xclose (infd);
xclose (outfd);
if (!test->sizes)
/* Skip the other sizes unless they have been
requested. */
break;
}
free (infile);
free (outfile);
free (xdevfile);
return 0;
}
#include <support/test-driver.c>