Spawn a terminal for the debugger when needed if we are not already attached to one

1 files changed, 44 insertions, 0 deletions

diff --git a/termhelper.c b/termhelper.c
new file mode 100644
index 0000000..a5cf17c
--- /dev/null
+++ b/termhelper.c
@@ -0,0 +1,44 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "terminal.h"
+
+char buf[4096];
+
+void copy_data(int to, int from)
+{
+	ssize_t bytes = read(from, buf, sizeof(buf));
+	while (bytes > 0)
+	{
+		ssize_t written = write(to, buf, bytes);
+		if (written == -1) {
+			exit(1);
+		}
+		bytes -= written;
+	}
+}
+
+int main(int argc, char **argv)
+{
+	//these will block so order is important
+	int input_fd = open(INPUT_PATH, O_WRONLY);
+	int output_fd = open(OUTPUT_PATH, O_RDONLY);
+	fd_set read_fds;
+	FD_ZERO(&read_fds);
+	for (;;)
+	{
+		FD_SET(STDIN_FILENO, &read_fds);
+		FD_SET(output_fd, &read_fds);
+		select(output_fd+1, &read_fds, NULL, NULL, NULL);
+		
+		if (FD_ISSET(STDIN_FILENO, &read_fds)) {
+			copy_data(input_fd, STDIN_FILENO);
+		}
+		if (FD_ISSET(output_fd, &read_fds)) {
+			copy_data(STDOUT_FILENO, output_fd);
+		}
+	}
+	return 0;
+}