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/*
* Check decoding of recvfrom MSG_TRUNC.
*
* Copyright (c) 2019-2021 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <stdio.h>
#include <sys/socket.h>
int
main(void)
{
static const char sbuf[2] = "AB";
int sv[2];
TAIL_ALLOC_OBJECT_CONST_PTR(char, rbuf);
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, sv))
perror_msg_and_skip("socketpair");
if (send(sv[1], sbuf + 1, 1, 0) != 1)
perror_msg_and_skip("send");
if (recvfrom(sv[0], rbuf - 1, 2, MSG_PEEK, NULL, NULL) != 1)
perror_msg_and_fail("recvfrom");
printf("recvfrom(%d, \"B\", 2, MSG_PEEK, NULL, NULL) = 1\n", sv[0]);
if (recvfrom(sv[0], rbuf, 1, MSG_TRUNC, NULL, NULL) != 1)
perror_msg_and_skip("recvfrom");
printf("recvfrom(%d, \"B\", 1, MSG_TRUNC, NULL, NULL) = 1\n", sv[0]);
if (send(sv[1], sbuf, 2, 0) != 2)
perror_msg_and_skip("send");
if (recvfrom(sv[0], rbuf, 1, MSG_TRUNC, NULL, NULL) != 2)
perror_msg_and_skip("recvfrom");
printf("recvfrom(%d, \"A\", 1, MSG_TRUNC, NULL, NULL) = 2\n", sv[0]);
puts("+++ exited with 0 +++");
return 0;
}
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