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- #include <proto/socket.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/time.h>
- #include <netinet/in.h>
- #include <netdb.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <math.h>
- #include <fcntl.h>
- #include <sys/wait.h>
- #include <errno.h>
- #define TRUE 1
-
- /*
- * This program uses select() to check that someone is trying to connect
- * before calling accept().
- */
-
- int
- main(void)
- {
- int sock;
- long length;
- struct sockaddr_in server;
- int msgsock;
- char buf[1024];
- int rval;
- fd_set ready;
- struct timeval to;
- int pid;
- int fifo_ok = 1;
- int std_in[2];
- int std_out[2];
- char *argv[2];
-
- if (pipe(std_in) != 0 || pipe(std_out) != 0) {
- printf("Cannot get a pipe.\n");
- exit(1);
- }
- fcntl(std_out[0], F_SETFL, O_NONBLOCK);
- argv[0] = "getaline";
- argv[1] = NULL;
- pid = exec(argv[0], argv, std_in[0], std_out[1], NULL, 4096);
- if (pid < 0) {
- printf("Cannot exec %s.\n", argv[0]);
- exit(1);
- }
-
- /* Create socket */
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock < 0) {
- perror("opening stream socket");
- exit(1);
- }
- /* Name socket using wildcards */
- server.sin_family = AF_INET;
- server.sin_addr.s_addr = INADDR_ANY;
- server.sin_port = 0;
- if (bind(sock, (struct sockaddr *)&server, sizeof(server))) {
- perror("binding stream socket");
- exit(1);
- }
- /* Find out assigned port number and print it out */
- length = sizeof(server);
- if (getsockname(sock, (struct sockaddr *)&server, &length)) {
- perror("getting socket name");
- exit(1);
- }
- printf("Socket has port #%d\n", ntohs(server.sin_port));
-
- /* Start accepting connections */
- listen(sock, 5);
- do {
- FD_ZERO(&ready);
- FD_SET(sock, &ready);
- if (fifo_ok)
- FD_SET(std_out[0], &ready);
- to.tv_sec = 5;
- to.tv_usec = 0;
- if (select(max(sock,std_out[0]) + 1, &ready, 0, 0, &to) < 0) {
- perror("select");
- continue;
- }
- if (FD_ISSET(sock, &ready)) {
- msgsock = accept(sock, (struct sockaddr *)0, (long *)0);
- if (msgsock == -1)
- perror("accept");
- else do {
- bzero(buf, sizeof(buf));
- if ((rval = read(msgsock, buf, 1024)) < 0)
- perror("reading stream message");
- else if (rval == 0)
- printf("Ending connection\n");
- else
- printf("-->%s\n", buf);
- } while (rval > 0);
- close(msgsock);
- } else if (fifo_ok && FD_ISSET(std_out[0], &ready)) {
- bzero(buf, sizeof(buf));
- if ((rval = read(std_out[0], buf, 1024)) > 1)
- printf("-->%s", buf);
- else if (errno != EAGAIN || rval == 1) {
- printf("Child exited\n");
- wait(0);
- close(std_out[0]);
- close(std_in[1]);
- fifo_ok = 0;
- }
- } else
- printf("Do something else\n");
- } while (TRUE);
- }
-