91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
/*
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* Copyright (c) 2015-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <asm/unistd.h>
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#ifndef __NR_send
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# define __NR_send -1
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#endif
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#define SC_send 9
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#ifndef __NR_recv
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# define __NR_recv -1
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#endif
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#define SC_recv 10
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static int
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sys_send(int sockfd, const void *buf, size_t len, int flags)
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{
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int rc = socketcall(__NR_send, SC_send,
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sockfd, (long) buf, len, flags, 0);
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if (rc < 0 && ENOSYS == errno)
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perror_msg_and_skip("send");
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return rc;
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}
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static int
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sys_recv(int sockfd, const void *buf, size_t len, int flags)
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{
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int rc = socketcall(__NR_recv, SC_recv,
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sockfd, (long) buf, len, flags, 0);
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if (rc < 0 && ENOSYS == errno)
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perror_msg_and_skip("recv");
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return rc;
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}
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static void
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transpose(char *str, const size_t len)
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{
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size_t i;
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for (i = 0; i < len / 2; ++i) {
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char c = str[i];
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str[i] = str[len - 1 - i];
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str[len - 1 - i] = c;
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}
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}
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int
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main(int ac, char **av)
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{
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assert(ac == 2);
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const size_t len = strlen(av[1]);
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assert(len);
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char *const buf0 = tail_alloc(len);
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char *const buf1 = tail_alloc(len);
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memcpy(buf0, av[1], len);
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(void) close(0);
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(void) close(1);
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int sv[2];
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
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perror_msg_and_skip("socketpair");
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assert(sys_send(0, buf0, len, MSG_DONTROUTE) == (int) len);
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assert(sys_recv(1, buf1, len, MSG_WAITALL) == (int) len);
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transpose(buf1, len);
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assert(sys_send(1, buf1, len, MSG_DONTROUTE) == (int) len);
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if (close(1))
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perror_msg_and_fail("close(1)");
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assert(sys_recv(0, buf0, len, MSG_WAITALL) == (int) len);
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if (close(0))
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perror_msg_and_fail("close(0)");
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assert(sys_recv(0, NULL, len, MSG_DONTWAIT) == -1);
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return 0;
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}
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