--- /dev/null
+/*
+ * Copyright (c) 2015-2016 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 <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_send
+# define __NR_send -1
+#endif
+#define SC_send 9
+
+#ifndef __NR_recv
+# define __NR_recv -1
+#endif
+#define SC_recv 10
+
+static int
+sys_send(int sockfd, const void *buf, size_t len, int flags)
+{
+ int rc = socketcall(__NR_send, SC_send,
+ sockfd, (long) buf, len, flags, 0);
+ if (rc < 0 && ENOSYS == errno)
+ perror_msg_and_skip("send");
+ return rc;
+}
+
+static int
+sys_recv(int sockfd, const void *buf, size_t len, int flags)
+{
+ int rc = socketcall(__NR_recv, SC_recv,
+ sockfd, (long) buf, len, flags, 0);
+ if (rc < 0 && ENOSYS == errno)
+ perror_msg_and_skip("recv");
+ return rc;
+}
+
+static void
+transpose(char *str, const size_t len)
+{
+ size_t i;
+
+ for (i = 0; i < len / 2; ++i) {
+ char c = str[i];
+ str[i] = str[len - 1 - i];
+ str[len - 1 - i] = c;
+ }
+}
+
+int
+main(int ac, char **av)
+{
+ assert(ac == 2);
+ const size_t len = strlen(av[1]);
+ assert(len);
+ char *const buf0 = tail_alloc(len);
+ char *const buf1 = tail_alloc(len);
+ memcpy(buf0, av[1], len);
+
+ (void) close(0);
+ (void) close(1);
+
+ int sv[2];
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
+ perror_msg_and_skip("socketpair");
+
+ assert(sys_send(0, buf0, len, MSG_DONTROUTE) == (int) len);
+ assert(sys_recv(1, buf1, len, MSG_WAITALL) == (int) len);
+
+ transpose(buf1, len);
+ assert(sys_send(1, buf1, len, MSG_DONTROUTE) == (int) len);
+ if (close(1))
+ perror_msg_and_fail("close(1)");
+
+ assert(sys_recv(0, buf0, len, MSG_WAITALL) == (int) len);
+ if (close(0))
+ perror_msg_and_fail("close(0)");
+ assert(sys_recv(0, NULL, len, MSG_DONTWAIT) == -1);
+
+ return 0;
+}
--- /dev/null
+send(0, "abcdefghijklmnopqrstuvwxyz", 26, MSG_DONTROUTE) = 26
+ | 00000 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70 abcdefghijklmnop |
+ | 00010 71 72 73 74 75 76 77 78 79 7a qrstuvwxyz |
+recv(1, "abcdefghijklmnopqrstuvwxyz", 26, MSG_WAITALL) = 26
+send(1, "zyxwvutsrqponmlkjihgfedcba", 26, MSG_DONTROUTE) = 26
+recv(0, "zyxwvutsrqponmlkjihgfedcba", 26, MSG_WAITALL) = 26
+ | 00000 7a 79 78 77 76 75 74 73 72 71 70 6f 6e 6d 6c 6b zyxwvutsrqponmlk |
+ | 00010 6a 69 68 67 66 65 64 63 62 61 jihgfedcba |
+recv(0, NULL, 26, MSG_DONTWAIT) = -1 EBADF (Bad file descriptor)
++++ exited with 0 +++
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