Fix early exit from Apple II connect and install permissions

src/a2tty.c

@@ -0,0 +1,106 @@
+#include "a2lib.c"
+#include <termios.h>
+#define	RUN	0
+#define	STOP	1
+
+int a2cin(int fd, char cin)
+{
+    unsigned char cinpkt[2];
+    cinpkt[0] = 0x96; // keyboard input
+    cinpkt[1] = cin;
+    return (write(fd, cinpkt, 2));
+}
+int main(int argc, char **argv)
+{
+    struct termios oldtio,newtio;
+    fd_set readset, openset;
+    unsigned char iopkt[2];
+    int state = RUN, echochr = 0;
+    int pifd = a2open(argc > 1 ? argv[1] : "127.0.0.1");
+    if (pifd < 0)
+    {
+	perror("Unable to connect to Apple II Pi");
+	exit(EXIT_FAILURE);
+    }
+    /*
+     * Are we running interactively?
+     */
+    if (isatty(STDIN_FILENO))
+    {
+	/*
+	 * Change input setting to work better as a terminal.
+	 */
+	tcgetattr(STDIN_FILENO, &oldtio); /* save current port settings */
+	bzero(&newtio, sizeof(newtio));
+	newtio.c_cflag     = /*BAUDRATE | CRTSCTS |*/ CS8 | CLOCAL | CREAD;
+	newtio.c_iflag     = IGNPAR;
+	newtio.c_oflag     = 0;
+	newtio.c_lflag     = 0; /* set input mode (non-canonical, no echo,...) */
+	newtio.c_cc[VTIME] = 0; /* inter-character timer unused */
+	newtio.c_cc[VMIN]  = 1; /* blocking read until 1 char received */
+	tcsetattr(STDIN_FILENO, TCSANOW, &newtio);
+	/*
+	 * Prepare for select().
+	 */
+	echofd = 0;
+	FD_ZERO(&openset);
+	FD_SET(pifd,  &openset);
+	FD_SET(STDIN_FILENO, &openset);
+	/*
+	 * Event loop
+	 */
+	while (state == RUN)
+	{
+	    memcpy(&readset, &openset, sizeof(openset));
+	    if (select(pifd + 1, &readset, NULL, NULL, NULL) > 0)
+	    {
+		/*
+		 * Apple II character output.
+		 */
+		if (FD_ISSET(pifd, &readset))
+		{
+		    if (read(pifd, iopkt, 2) == 2)
+		    {
+			/*
+			 * Acknowledgement.
+			 */
+		    }
+		    else
+			/*
+			 * Some kind of client/server error.
+			 */
+			state = STOP;
+		}
+		if (FD_ISSET(STDIN_FILENO, &readset))
+		{
+		    if (read(STDIN_FILENO, iopkt, 1) == 1)
+		    {
+			/*
+			 * Chain input character to child.
+			 */
+		    }
+		    else
+			/*
+			 * stdin probably closed.
+			 */
+			state = STOP;
+		}
+		if (FD_ISSET(fdecho, &readset))
+		{
+		    if (read(STDIN_FILENO, iopkt, 1) == 1)
+		    {
+			/*
+			 * Send stdout as cin to Apple II.
+			 */
+			if (opkt[0] == 0x04) // Ctrl-D
+			    state = STOP;
+			a2cin(pifd, iopkt[0] | 0x80);
+		    }
+		}
+	    }
+	}
+    }
+    tcsetattr(STDIN_FILENO, TCSANOW, &oldtio);
+    a2close(pifd);
+    return EXIT_SUCCESS;
+}

src/install.sh

@@ -22,5 +22,6 @@ if [ -f /etc/rc.local ] ; then
 	if ! grep a2pid /etc/rc.local > /dev/null ; then
 		mv /etc/rc.local /etc/rc.local.bak
 		sed -e '/^exit/i\# Start Apple II Pi' -e '/^exit/i\/usr/local/bin/a2serclk' -e '/^exit/i\/usr/local/bin/a2pid --daemon' /etc/rc.local.bak > /etc/rc.local
+		chmod +x /etc/rc.local
 	fi
 fi