blob: beac680fde56e2621156ff2673867b4781564ae4 [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_PWRITEV
# include <fcntl.h>
# include <stdio.h>
# include <sys/uio.h>
# include <unistd.h>
# define LEN 8
# define LIM (LEN - 1)
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) {
if (i < LIM)
printf("\\%d", (int) buf[i]);
}
printf("\"%s, %u}",
i > LIM ? "..." : "", (unsigned) iov->iov_len);
}
static void
print_iovec(const struct iovec *iov, unsigned int cnt, unsigned int size)
{
if (!size) {
printf("%p", iov);
return;
}
unsigned int i;
putchar('[');
for (i = 0; i < cnt; ++i) {
if (i)
fputs(", ", stdout);
if (i == LIM) {
fputs("...", stdout);
break;
}
if (i == size) {
printf("%p", &iov[i]);
break;
}
print_iov(&iov[i]);
}
putchar(']');
}
int
main(void)
{
(void) close(0);
if (open("/dev/null", O_WRONLY))
perror_msg_and_fail("open");
char *buf = tail_alloc(LEN);
unsigned i;
for (i = 0; i < LEN; ++i)
buf[i] = i;
struct iovec *iov = tail_alloc(sizeof(*iov) * LEN);
for (i = 0; i < LEN; ++i) {
buf[i] = i;
iov[i].iov_base = &buf[i];
iov[i].iov_len = LEN - i;
}
tail_alloc(1);
const off_t offset = 0xdefaceddeadbeefLL;
long rc;
int written = 0;
for (i = 0; i < LEN; ++i) {
written += iov[i].iov_len;
if (pwritev(0, iov, i + 1, offset + i) != written)
perror_msg_and_fail("pwritev");
fputs("pwritev(0, ", stdout);
print_iovec(iov, i + 1, LEN);
printf(", %u, %lld) = %d\n",
i + 1, (long long) offset + i, written);
}
for (i = 0; i <= LEN; ++i) {
unsigned int n = LEN + 1 - i;
fputs("pwritev(0, ", stdout);
print_iovec(iov + i, n, LEN - i);
rc = pwritev(0, iov + i, n, offset + LEN + i);
printf(", %u, %lld) = %ld %s (%m)\n",
n, (long long) offset + LEN + i, rc, errno2name());
}
iov->iov_base = iov + LEN * 2;
rc = pwritev(0, iov, 1, -1);
printf("pwritev(0, [{%p, %d}], 1, -1) = %ld %s (%m)\n",
iov->iov_base, LEN, rc, errno2name());
iov += LEN;
rc = pwritev(0, iov, 42, -2);
printf("pwritev(0, %p, 42, -2) = %ld %s (%m)\n",
iov, rc, errno2name());
rc = pwritev(0, NULL, 1, -3);
printf("pwritev(0, NULL, 1, -3) = %ld %s (%m)\n",
rc, errno2name());
rc = pwritev(0, NULL, 0, -4);
printf("pwritev(0, [], 0, -4) = %ld %s (%m)\n",
rc, errno2name());
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_PWRITEV")
#endif