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Diffstat (limited to 'share/doc/psd/20.ipctut/udgramread.c')
-rw-r--r-- | share/doc/psd/20.ipctut/udgramread.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/share/doc/psd/20.ipctut/udgramread.c b/share/doc/psd/20.ipctut/udgramread.c new file mode 100644 index 0000000..1b6aa3b --- /dev/null +++ b/share/doc/psd/20.ipctut/udgramread.c @@ -0,0 +1,80 @@ +.\" Copyright (c) 1986, 1993 +.\" The Regents of the University of California. 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" @(#)udgramread.c 8.1 (Berkeley) 6/8/93 +.\" +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/un.h> + +/* + * In the included file <sys/un.h> a sockaddr_un is defined as follows + * struct sockaddr_un { + * short sun_family; + * char sun_path[108]; + * }; + */ + +#include <stdio.h> + +#define NAME "socket" + +/* + * This program creates a UNIX domain datagram socket, binds a name to it, + * then reads from the socket. + */ +main() +{ + int sock, length; + struct sockaddr_un name; + char buf[1024]; + + /* Create socket from which to read. */ + sock = socket(AF_UNIX, SOCK_DGRAM, 0); + if (sock < 0) { + perror("opening datagram socket"); + exit(1); + } + /* Create name. */ + name.sun_family = AF_UNIX; + strcpy(name.sun_path, NAME); + if (bind(sock, &name, sizeof(struct sockaddr_un))) { + perror("binding name to datagram socket"); + exit(1); + } + printf("socket -->%s\en", NAME); + /* Read from the socket */ + if (read(sock, buf, 1024) < 0) + perror("receiving datagram packet"); + printf("-->%s\en", buf); + close(sock); + unlink(NAME); +} |