glibc/io/tst-copy_file_range.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

299 lines
8.4 KiB
C

/* Tests for copy_file_range.
Copyright (C) 2017-2022 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 <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/test-driver.h>
#include <support/xunistd.h>
/* 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;
/* 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. */
enum { maximum_size = 99999 };
static const int typical_sizes[] =
{ 0, 1, 2, 3, 1024, 2048, 4096, 8191, 8192, 8193, 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;
/* 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 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 },
{ "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);
outfd = create_temp_file ("tst-copy_file_range-out-", &outfile);
{
ssize_t ret = copy_file_range (infd, NULL, outfd, NULL, 0, 0);
if (ret != 0)
{
if (errno == ENOSYS)
FAIL_UNSUPPORTED ("copy_file_range is not support on this system");
FAIL_EXIT1 ("copy_file_range probing call: %m");
}
}
xclose (infd);
xclose (outfd);
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);
return 0;
}
#include <support/test-driver.c>