tests/pread64-pwrite64.c

/*
 * Check decoding of pread64 and pwrite64 syscalls.
 *
 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "tests.h"

#include <fcntl.h>
#include <stdio.h>
#include <sys/uio.h>
#include <unistd.h>

int
main(void)
{
	tprintf("%s", "");

	static char tmp[] = "pread64-pwrite64-tmpfile";
	if (open(tmp, O_CREAT|O_RDONLY|O_TRUNC, 0600) != 0)
		perror_msg_and_fail("creat: %s", tmp);
	if (open(tmp, O_WRONLY) != 1)
		perror_msg_and_fail("open: %s", tmp);

	char *nil = tail_alloc(1);
	*nil = '\0';

	static const char w_c[] = "0123456789abcde";
	const unsigned int w_len = LENGTH_OF(w_c);
	const char *w_d = hexdump_strdup(w_c);
	const void *w = tail_memdup(w_c, w_len);

	static const char r0_c[] = "01234567";
	const char *r0_d = hexdump_strdup(r0_c);
	const unsigned int r0_len = (w_len + 1) / 2;
	void *r0 = tail_alloc(r0_len);

	static const char r1_c[] = "89abcde";
	const char *r1_d = hexdump_strdup(r1_c);
	const unsigned int r1_len = w_len - r0_len;
	void *r1 = tail_alloc(w_len);

	void *efault = r1 - get_page_size();

	long rc;

	rc = pwrite(1, w, 0, 0);
	if (rc)
		perror_msg_and_fail("pwrite64: expected 0, returned %ld", rc);
	tprintf("pwrite64(1, \"\", 0, 0) = 0\n");

	rc = pwrite(1, w, w_len + 1, 0);
	if (rc != -1)
		perror_msg_and_fail("pwrite64: expected -1 EFAULT"
				    ", returned %ld", rc);
	tprintf("pwrite64(1, %p, %u, 0) = -1 EFAULT (%m)\n",
		w, w_len + 1);

	rc = pwrite(1, nil, 1, -3);
	if (rc != -1)
		perror_msg_and_fail("pwrite64: expected -1, returned %ld", rc);
	tprintf("pwrite64(1, \"\\0\", 1, -3) = -1 EINVAL (%m)\n");

	rc = pwrite(1, w, w_len, 0);
	if (rc != (int) w_len)
		perror_msg_and_fail("pwrite64: expected %u, returned %ld",
				    w_len, rc);
	tprintf("pwrite64(1, \"%s\", %u, 0) = %ld\n"
		" | 00000 %-49s  %-16s |\n",
		w_c, w_len, rc, w_d, w_c);
	close(1);

	rc = pread(0, efault, 1, 0);
	if (rc != -1)
		perror_msg_and_fail("pread64: expected -1, returned %ld", rc);
	tprintf("pread64(0, %p, 1, 0) = -1 EFAULT (%m)\n", efault);

	rc = pread(0, efault, 2, -7);
	if (rc != -1)
		perror_msg_and_fail("pread64: expected -1, returned %ld", rc);
	tprintf("pread64(0, %p, 2, -7) = -1 EINVAL (%m)\n", efault);

	rc = pread(0, r0, r0_len, 0);
	if (rc != (int) r0_len)
		perror_msg_and_fail("pread64: expected %u, returned %ld",
				    r0_len, rc);
	tprintf("pread64(0, \"%s\", %u, 0) = %ld\n"
		" | 00000 %-49s  %-16s |\n",
		r0_c, r0_len, rc, r0_d, r0_c);

	rc = pread(0, r1, w_len, r0_len);
	if (rc != (int) r1_len)
		perror_msg_and_fail("pread64: expected %u, returned %ld",
				    r1_len, rc);
	tprintf("pread64(0, \"%s\", %u, %u) = %ld\n"
		" | 00000 %-49s  %-16s |\n",
		r1_c, w_len, r0_len, rc, r1_d, r1_c);
	close(0);

	const off_t offset = 0xdefaceddeadbeefLL;
	const int rw_len = 8;
	char *rw_buf = tail_alloc(rw_len);

	if (open("/dev/zero", O_RDONLY))
		perror_msg_and_fail("open");

	rc = pread(0, rw_buf, rw_len, offset);
	if (rc != rw_len)
		perror_msg_and_fail("pread64: expected %d, returned %ld",
				    rw_len, rc);

	tprintf("%s(%d, \"%s\", %d, %lld) = %ld\n"
		" | 00000 %-49s  %-16s |\n",
		"pread64", 0, "\\0\\0\\0\\0\\0\\0\\0\\0",
		rw_len, (long long) offset, rc,
		" 00 00 00 00 00 00 00 00", "........");

	if (open("/dev/null", O_WRONLY) != 1)
		perror_msg_and_fail("open");

	rc = pwrite(1, rw_buf, rw_len, offset);
	if (rc != rw_len)
		perror_msg_and_fail("pwrite64: expected %d, returned %ld",
				    rw_len, rc);

	tprintf("%s(%d, \"%s\", %d, %lld) = %ld\n"
		" | 00000 %-49s  %-16s |\n",
		"pwrite64", 1, "\\0\\0\\0\\0\\0\\0\\0\\0",
		rw_len, (long long) offset, rc,
		" 00 00 00 00 00 00 00 00", "........");

	tprintf("+++ exited with 0 +++\n");
	return 0;
}