Initial revision.

Tools/Construct/Parallel/Makefile.am

@@ -0,0 +1,17 @@
+bin_PROGRAMS = server client
+
+server_SOURCES = server.cxx
+
+server_LDADD = 
+
+client_SOURCES = client.cxx
+
+client_LDADD = \
+	$(top_builddir)/Lib/Bucket/libBucket.a \
+	$(top_builddir)/Lib/Misc/libMisc.a
+
+INCLUDES += \
+	-I$(top_builddir) \
+	-I$(top_builddir)/Lib \
+	-I$(top_builddir)/Tools/Lib \
+	-I$(top_builddir)/Tools/Construct

Tools/Construct/Parallel/client.cxx

@@ -0,0 +1,98 @@
+/* remote_exec.c -- Written by Curtis Olson */
+/*               -- for CSci 5502 */
+
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+#include <stdlib.h>  // atoi()
+#include <string.h>  // bcopy()
+
+#include "remote_exec.h"
+
+char *determine_port(char *host);
+
+
+int make_socket (char *host, unsigned short int port) {
+    int sock;
+    struct sockaddr_in name;
+    struct hostent *hp;
+     
+    // Create the socket.
+    sock = socket (PF_INET, SOCK_STREAM, 0);
+    if (sock < 0) {
+	perror ("socket");
+	exit (EXIT_FAILURE);
+    }
+     
+    // specify address family
+    name.sin_family = AF_INET;
+
+    // get the hosts official name/info
+    hp = gethostbyname(host);
+
+    // Connect this socket to the host and the port specified on the
+    // command line
+    bcopy(hp->h_addr, &(name.sin_addr.s_addr), hp->h_length);
+    name.sin_port = htons(port);
+
+    if ( connect(sock, (struct sockaddr *) &name, 
+		 sizeof(struct sockaddr_in)) < 0 )
+    {
+	close(sock);
+	perror("Cannot connect to stream socket");
+	exit(-1);
+    }
+
+    return sock;
+}
+
+
+main(int argc, char *argv[]) {
+    int sock, len;
+    fd_set ready;
+    int port;
+    char message[256];
+
+    /* Check usage */
+    if ( argc < 3 ) {
+	printf("Usage: %s remote_machine port\n", argv[0]);
+	exit(1);
+    }
+
+    port = atoi(argv[2]);
+    sock = make_socket(argv[1], port);
+
+    /* build a command string from the argv[]'s */
+    strcpy(message, "hello world!\n");
+
+    /* send command and arguments to remote server */
+    if ( write(sock, message, sizeof(message)) < 0 ) {
+	perror("Cannot write to stream socket");
+    }
+
+    for ( ;; ) {
+	/* loop until remote program finishes */
+
+        FD_ZERO(&ready);
+        FD_SET(sock, &ready);
+
+	/* block until input from sock or stdin */
+	select(32, &ready, 0, 0, NULL);
+
+	if ( FD_ISSET(sock, &ready) ) {
+	    /* input coming from socket */
+	    if ( (len = read(sock, message, 1024)) > 0 ) {
+		write(1, message, len);
+	    } else {
+		exit(0);
+	    }
+	}
+    }
+    close(sock);
+}

Tools/Construct/Parallel/server.cxx

@@ -0,0 +1,114 @@
+// remote_server.c -- Written by Curtis Olson
+//                 -- for CSci 5502
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <sys/socket.h>  // bind
+#include <netinet/in.h>
+
+#include <unistd.h>
+
+#include <iostream>
+
+// #include <netdb.h>
+// #include <fcntl.h>
+// #include <stdio.h>
+
+
+#define MAXBUF 1024
+
+int make_socket (unsigned short int* port) {
+    int sock;
+    struct sockaddr_in name;
+    socklen_t length;
+     
+    // Create the socket.
+    sock = socket (PF_INET, SOCK_STREAM, 0);
+    if (sock < 0) {
+	perror ("socket");
+	exit (EXIT_FAILURE);
+    }
+     
+    // Give the socket a name.
+    name.sin_family = AF_INET;
+    name.sin_addr.s_addr = INADDR_ANY;
+    name.sin_port = 0 /* htons (port) */;
+    name.sin_addr.s_addr = htonl (INADDR_ANY);
+    if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {
+	perror ("bind");
+	exit (EXIT_FAILURE);
+    }
+     
+    // Find the assigned port number
+    length = sizeof(struct sockaddr_in);
+    if ( getsockname(sock, (struct sockaddr *) &name, &length) ) {
+	perror("Cannot get socket's port number");
+    }
+    *port = ntohs(name.sin_port);
+
+    return sock;
+}
+
+
+main() {
+    int sock, msgsock, length, pid;
+    fd_set ready;
+    short unsigned int port;
+    char buf[MAXBUF];
+
+    sock = make_socket( &port );
+
+    // Save the port number
+    // set_port( port );
+    cout << "socket is connected to port = " << port << endl;
+
+    /* Specify the maximum length of the connection queue */
+    listen(sock, 3);
+
+    for ( ;; ) {
+	FD_ZERO(&ready);
+	FD_SET(sock, &ready);
+	
+	/* block until we get some input on sock */
+	select(32, &ready, 0, 0, NULL);
+
+	if ( FD_ISSET(sock, &ready) ) {
+	    /* printf("%d %d Incomming message --> ", getpid(), pid); */
+
+	    msgsock = accept(sock, 0, 0);
+
+	    /* spawn a child */
+	    pid = fork();
+
+	    if ( pid < 0 ) {
+		/* error */
+		perror("Cannot fork child process");
+		exit(-1);
+	    } else if ( pid > 0 ) {
+		/* This is the parent */
+		close(msgsock);
+	    } else {
+		/* This is the child */
+
+		cout << "new process started to handle new connection" << endl;
+		// Read client's message
+		while ( (length = read(msgsock, buf, MAXBUF)) > 0) {
+		    cout << "buffer length = " << length << endl;
+		    buf[length] = '\0';
+		    cout << "Incoming command -> " << buf;
+
+		    // reply to the client
+		    if ( write(sock, message, sizeof(message)) < 0 ) {
+			perror("Cannot write to stream socket");
+		    }
+
+		    
+		}
+		cout << "process ended" << endl;
+		exit(0);
+	    }
+	}
+    }
+}