blob: f3d02e53d463de54e0150fa73282d4f9a38abd9a [file] [log] [blame]
/*
* Copyright (c) 2014-2016 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"
#ifdef HAVE_PREADV
# include <fcntl.h>
# include <stdio.h>
# include <sys/uio.h>
# include <unistd.h>
# define LEN 8
static void
print_iov(const struct iovec *iov)
{
unsigned int i;
unsigned char *buf = iov->iov_base;
fputs("{\"", stdout);
for (i = 0; i < iov->iov_len; ++i)
printf("\\%d", (int) buf[i]);
printf("\", %u}", (unsigned) iov->iov_len);
}
static void
print_iovec(const struct iovec *iov, unsigned int cnt)
{
unsigned int i;
putchar('[');
for (i = 0; i < cnt; ++i) {
if (i)
fputs(", ", stdout);
print_iov(&iov[i]);
}
putchar(']');
}
int
main(void)
{
const off_t offset = 0xdefaceddeadbeefLL;
char *buf = tail_alloc(LEN);
struct iovec *iov = tail_alloc(sizeof(*iov));
iov->iov_base = buf;
iov->iov_len = LEN;
(void) close(0);
if (open("/dev/zero", O_RDONLY))
perror_msg_and_fail("open");
if (preadv(0, iov, 1, offset) != LEN)
perror_msg_and_fail("preadv");
printf("preadv(0, ");
print_iovec(iov, 1);
printf(", 1, %lld) = %u\n", (long long) offset, LEN);
if (preadv(0, iov, 1, -1) != -1)
perror_msg_and_fail("preadv");
printf("preadv(0, %p, 1, -1) = -1 EINVAL (%m)\n", iov);
if (preadv(0, NULL, 1, -2) != -1)
perror_msg_and_fail("preadv");
printf("preadv(0, NULL, 1, -2) = -1 EINVAL (%m)\n");
if (preadv(0, iov, 0, -3) != -1)
perror_msg_and_fail("preadv");
printf("preadv(0, [], 0, -3) = -1 EINVAL (%m)\n");
static const char tmp[] = "preadv-tmpfile";
int fd = open(tmp, O_RDWR | O_CREAT | O_TRUNC, 0600);
if (fd < 0)
perror_msg_and_fail("open");
if (unlink(tmp))
perror_msg_and_fail("unlink");
static const char w[] = "0123456789abcde";
if (write(fd, w, LENGTH_OF(w)) != LENGTH_OF(w))
perror_msg_and_fail("write");
static const char r0_c[] = "01234567";
static const char r1_c[] = "89abcde";
const unsigned int r_len = (LENGTH_OF(w) + 1) / 2;
void *r0 = tail_alloc(r_len);
const struct iovec r0_iov_[] = {
{
.iov_base = r0,
.iov_len = r_len
}
};
const struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_));
long rc;
rc = preadv(fd, r_iov, ARRAY_SIZE(r0_iov_), 0);
if (rc != (int) r_len)
perror_msg_and_fail("preadv: expected %u, returned %ld",
r_len, rc);
printf("preadv(%d, [{\"%s\", %u}], %u, 0) = %u\n",
fd, r0_c, r_len, ARRAY_SIZE(r0_iov_), r_len);
void *r1 = tail_alloc(r_len);
void *r2 = tail_alloc(LENGTH_OF(w));
const struct iovec r1_iov_[] = {
{
.iov_base = r1,
.iov_len = r_len
},
{
.iov_base = r2,
.iov_len = LENGTH_OF(w)
}
};
r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_));
rc = preadv(fd, r_iov, ARRAY_SIZE(r1_iov_), r_len);
if (rc != (int) LENGTH_OF(w) - r_len)
perror_msg_and_fail("preadv: expected %d, returned %ld",
(int) LENGTH_OF(w) - r_len, rc);
printf("preadv(%d, [{\"%s\", %u}, {\"\", %u}], %u, %u) = %u\n",
fd, r1_c, r_len, LENGTH_OF(w), ARRAY_SIZE(r1_iov_),
r_len, LENGTH_OF(w) - r_len);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_PREADV")
#endif