00001 /*
00002     Socket example program
00003     AUP2, Sec. 8.01.1
00004 
00005     Copyright 2003 by Marc J. Rochkind. All rights reserved.
00006     May be copied only for purposes and under conditions described
00007     on the Web page www.basepath.com/aup/copyright.htm.
00008 
00009     The Example Files are provided "as is," without any warranty;
00010     without even the implied warranty of merchantability or fitness
00011     for a particular purpose. The author and his publisher are not
00012     responsible for any damages, direct or incidental, resulting
00013     from the use or non-use of these Example Files.
00014 
00015     The Example Files may contain defects, and some contain deliberate
00016     coding mistakes that were included for educational reasons.
00017     You are responsible for determining if and how the Example Files
00018     are to be used.
00019 
00020 */
00021 #include "defs.h"
00022 #include <sys/socket.h>
00023 #include <sys/un.h>
00024 /*[pgm]*/
00025 #define SOCKETNAME "MySocket"
00026 
00027 int main(void)
00028 {
00029     struct sockaddr_un sa;
00030 
00031     (void)unlink(SOCKETNAME);
00032     strcpy(sa.sun_path, SOCKETNAME);
00033     sa.sun_family = AF_UNIX;
00034     if (fork() == 0) { /* client */
00035         int fd_skt;
00036         char buf[100];
00037 
00038         ec_neg1( fd_skt = socket(AF_UNIX, SOCK_STREAM, 0) )
00039         while (connect(fd_skt, (struct sockaddr *)&sa, sizeof(sa)) == -1)
00040             if (errno == ENOENT) {
00041                 sleep(1);
00042                 continue;
00043             }
00044             else
00045                 EC_FAIL
00046         ec_neg1( write(fd_skt, "Hello!", 7 ) )
00047         ec_neg1( read(fd_skt, buf, sizeof(buf)) )
00048         printf("Client got \"%s\"\n", buf);
00049         ec_neg1( close(fd_skt) )
00050         exit(EXIT_SUCCESS);
00051     }
00052     else { /* server */
00053         int fd_skt, fd_client;
00054         char buf[100];
00055 
00056         ec_neg1( fd_skt = socket(AF_UNIX, SOCK_STREAM, 0) )
00057         ec_neg1( bind(fd_skt, (struct sockaddr *)&sa, sizeof(sa)) )
00058         ec_neg1( listen(fd_skt, SOMAXCONN) )
00059         ec_neg1( fd_client = accept(fd_skt, NULL, 0) )
00060         ec_neg1( read(fd_client, buf, sizeof(buf)) )
00061         printf("Server got \"%s\"\n", buf);
00062         ec_neg1( write(fd_client, "Goodbye!", 9 ) )
00063         ec_neg1( close(fd_skt) )
00064         ec_neg1( close(fd_client) )
00065         exit(EXIT_SUCCESS);
00066     }
00067 
00068 EC_CLEANUP_BGN
00069         exit(EXIT_FAILURE);
00070 EC_CLEANUP_END
00071 }
00072 /*[]*/
c8/sktex.c
