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shutdown
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Makefile
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shutdown.c
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Editing: shutdown.c
/*- * Copyright (C) 2005 The FreeBSD Project. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. * * $FreeBSD$ */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <err.h> #include <errno.h> #include <stdio.h> #include <string.h> #include <unistd.h> int main(void) { struct sockaddr_in sock; socklen_t len; int listen_sock, connect_sock; u_short port; listen_sock = -1; /* Shutdown(2) on an invalid file descriptor has to return EBADF. */ if ((shutdown(listen_sock, SHUT_RDWR) != -1) && (errno != EBADF)) errx(-1, "shutdown() for invalid file descriptor does not " "return EBADF"); listen_sock = socket(PF_INET, SOCK_STREAM, 0); if (listen_sock == -1) errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for listen socket: %s", strerror(errno)); bzero(&sock, sizeof(sock)); sock.sin_len = sizeof(sock); sock.sin_family = AF_INET; sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK); sock.sin_port = 0; if (bind(listen_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0) errx(-1, "bind(%s, %d) for listen socket: %s", inet_ntoa(sock.sin_addr), sock.sin_port, strerror(errno)); len = sizeof(sock); if (getsockname(listen_sock, (struct sockaddr *)&sock, &len) < 0) errx(-1, "getsockname() for listen socket: %s", strerror(errno)); port = sock.sin_port; if (listen(listen_sock, -1) < 0) errx(-1, "listen() for listen socket: %s", strerror(errno)); connect_sock = socket(PF_INET, SOCK_STREAM, 0); if (connect_sock == -1) errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect " "socket: %s", strerror(errno)); bzero(&sock, sizeof(sock)); sock.sin_len = sizeof(sock); sock.sin_family = AF_INET; sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK); sock.sin_port = port; if (connect(connect_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0) errx(-1, "connect() for connect socket: %s", strerror(errno)); /* Try to pass an invalid flags. */ if ((shutdown(connect_sock, SHUT_RD - 1) != -1) && (errno != EINVAL)) errx(-1, "shutdown(SHUT_RD - 1) does not return EINVAL"); if ((shutdown(connect_sock, SHUT_RDWR + 1) != -1) && (errno != EINVAL)) errx(-1, "shutdown(SHUT_RDWR + 1) does not return EINVAL"); if (shutdown(connect_sock, SHUT_RD) < 0) errx(-1, "shutdown(SHUT_RD) for connect socket: %s", strerror(errno)); if (shutdown(connect_sock, SHUT_WR) < 0) errx(-1, "shutdown(SHUT_WR) for connect socket: %s", strerror(errno)); close(connect_sock); close(listen_sock); return (0); }
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