38a7f1e446
- Staticize variables as needed - Garbage collect argc/argv - Fix -Wsign-compare warnings by casting small sizeof to (int) MFC after: 1 week Sponsored by: EMC / Isilon Storage Division
319 lines
7.4 KiB
C
319 lines
7.4 KiB
C
/*-
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* Copyright (c) 2005 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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/*
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* Simple regression test to exercise some error cases relating to the use of
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* bind() and connect() on UNIX domain sockets. In particular, make sure
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* that when two sockets rendezvous using the file system name space, they
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* get the expected success/failure cases.
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*
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* TODO:
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* - Check that the resulting file mode/owner are right.
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* - Do the same tests with UNIX domain sockets.
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* - Check the results of getsockaddr() and getpeeraddr().
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*/
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#define SOCK_NAME_ONE "socket.1"
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#define SOCK_NAME_TWO "socket.2"
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#define UNWIND_MAX 1024
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static int unwind_len;
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static struct unwind {
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char u_path[PATH_MAX];
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} unwind_list[UNWIND_MAX];
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static void
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push_path(const char *path)
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{
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if (unwind_len >= UNWIND_MAX)
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err(-1, "push_path: one path too many (%s)", path);
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strlcpy(unwind_list[unwind_len].u_path, path, PATH_MAX);
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unwind_len++;
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}
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static void
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unwind(void)
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{
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int i;
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for (i = unwind_len - 1; i >= 0; i--) {
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unlink(unwind_list[i].u_path);
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rmdir(unwind_list[i].u_path);
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}
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}
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static int
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bind_test(const char *directory_path)
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{
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char socket_path[PATH_MAX];
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struct sockaddr_un sun;
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int sock1, sock2;
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sock1 = socket(PF_UNIX, SOCK_STREAM, 0);
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if (sock1 < 0) {
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warn("bind_test: socket(PF_UNIX, SOCK_STREAM, 0)");
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return (-1);
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}
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if (snprintf(socket_path, sizeof(socket_path), "%s/%s",
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directory_path, SOCK_NAME_ONE) >= PATH_MAX) {
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warn("bind_test: snprintf(socket_path)");
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close(sock1);
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return (-1);
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}
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bzero(&sun, sizeof(sun));
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sun.sun_len = sizeof(sun);
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sun.sun_family = AF_UNIX;
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if (snprintf(sun.sun_path, sizeof(sun.sun_path), "%s", socket_path)
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>= (int)sizeof(sun.sun_path)) {
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warn("bind_test: snprintf(sun.sun_path)");
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close(sock1);
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return (-1);
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}
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if (bind(sock1, (struct sockaddr *)&sun, sizeof(sun)) < 0) {
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warn("bind_test: bind(sun) #1");
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close(sock1);
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return (-1);
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}
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push_path(socket_path);
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/*
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* Once a STREAM UNIX domain socket has been bound, it can't be
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* rebound. Expected error is EINVAL.
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*/
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if (bind(sock1, (struct sockaddr *)&sun, sizeof(sun)) == 0) {
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warnx("bind_test: bind(sun) #2 succeeded");
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close(sock1);
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return (-1);
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}
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if (errno != EINVAL) {
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warn("bind_test: bind(sun) #2");
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close(sock1);
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return (-1);
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}
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sock2 = socket(PF_UNIX, SOCK_STREAM, 0);
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if (sock2 < 0) {
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warn("bind_test: socket(PF_UNIX, SOCK_STREAM, 0)");
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close(sock1);
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return (-1);
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}
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/*
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* Since a socket is already bound to the pathname, it can't be bound
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* to a second socket. Expected error is EADDRINUSE.
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*/
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if (bind(sock2, (struct sockaddr *)&sun, sizeof(sun)) == 0) {
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warnx("bind_test: bind(sun) #3 succeeded");
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close(sock1);
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close(sock2);
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return (-1);
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}
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if (errno != EADDRINUSE) {
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warn("bind_test: bind(sun) #2");
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close(sock1);
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close(sock2);
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return (-1);
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}
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close(sock1);
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/*
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* The socket bound to the pathname has been closed, but the pathname
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* can't be reused without first being unlinked. Expected error is
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* EADDRINUSE.
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*/
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if (bind(sock2, (struct sockaddr *)&sun, sizeof(sun)) == 0) {
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warnx("bind_test: bind(sun) #4 succeeded");
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close(sock2);
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return (-1);
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}
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if (errno != EADDRINUSE) {
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warn("bind_test: bind(sun) #4");
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close(sock2);
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return (-1);
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}
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unlink(socket_path);
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/*
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* The pathname is now free, so the socket should be able to bind to
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* it.
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*/
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if (bind(sock2, (struct sockaddr *)&sun, sizeof(sun)) < 0) {
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warn("bind_test: bind(sun) #5");
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close(sock2);
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return (-1);
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}
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close(sock2);
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return (0);
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}
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static int
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connect_test(const char *directory_path)
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{
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char socket_path[PATH_MAX];
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struct sockaddr_un sun;
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int sock1, sock2;
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sock1 = socket(PF_UNIX, SOCK_STREAM, 0);
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if (sock1 < 0) {
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warn("connect_test: socket(PF_UNIX, SOCK_STREAM, 0)");
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return (-1);
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}
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if (snprintf(socket_path, sizeof(socket_path), "%s/%s",
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directory_path, SOCK_NAME_TWO) >= PATH_MAX) {
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warn("connect_test: snprintf(socket_path)");
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close(sock1);
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return (-1);
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}
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bzero(&sun, sizeof(sun));
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sun.sun_len = sizeof(sun);
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sun.sun_family = AF_UNIX;
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if (snprintf(sun.sun_path, sizeof(sun.sun_path), "%s", socket_path)
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>= (int)sizeof(sun.sun_path)) {
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warn("connect_test: snprintf(sun.sun_path)");
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close(sock1);
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return (-1);
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}
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/*
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* Try connecting to a path that doesn't yet exist. Should fail with
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* ENOENT.
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*/
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if (connect(sock1, (struct sockaddr *)&sun, sizeof(sun)) == 0) {
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warnx("connect_test: connect(sun) #1 succeeded");
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close(sock1);
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return (-1);
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}
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if (errno != ENOENT) {
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warn("connect_test: connect(sun) #1");
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close(sock1);
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return (-1);
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}
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if (bind(sock1, (struct sockaddr *)&sun, sizeof(sun)) < 0) {
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warn("connect_test: bind(sun) #1");
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close(sock1);
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return (-1);
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}
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if (listen(sock1, 3) < 0) {
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warn("connect_test: listen(sock1)");
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close(sock1);
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return (-1);
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}
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push_path(socket_path);
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sock2 = socket(PF_UNIX, SOCK_STREAM, 0);
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if (sock2 < 0) {
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warn("socket(PF_UNIX, SOCK_STREAM, 0)");
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close(sock1);
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return (-1);
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}
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/*
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* Do a simple connect and make sure that works.
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*/
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if (connect(sock2, (struct sockaddr *)&sun, sizeof(sun)) < 0) {
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warn("connect(sun) #2");
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close(sock1);
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return (-1);
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}
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close(sock2);
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close(sock1);
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sock2 = socket(PF_UNIX, SOCK_STREAM, 0);
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if (sock2 < 0) {
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warn("socket(PF_UNIX, SOCK_STREAM, 0)");
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return (-1);
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}
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/*
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* Confirm that once the listen socket is closed, we get a
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* connection refused (ECONNREFUSED) when attempting to connect to
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* the pathname.
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*/
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if (connect(sock2, (struct sockaddr *)&sun, sizeof(sun)) == 0) {
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warnx("connect(sun) #3 succeeded");
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close(sock2);
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return (-1);
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}
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if (errno != ECONNREFUSED) {
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warn("connect(sun) #3");
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close(sock2);
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return (-1);
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}
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close(sock2);
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unlink(socket_path);
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return (0);
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}
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int
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main(void)
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{
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char directory_path[PATH_MAX];
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int error;
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strlcpy(directory_path, "/tmp/unix_bind.XXXXXXX", PATH_MAX);
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if (mkdtemp(directory_path) == NULL)
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err(-1, "mkdtemp");
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push_path(directory_path);
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error = bind_test(directory_path);
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if (error == 0)
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error = connect_test(directory_path);
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unwind();
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return (error);
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}
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