begin simple child process interface

cli/main.c

@@ -1,7 +1,8 @@
-#include <stdio.h>
+#include <fcntl.h>
 #include <stdlib.h>
+#include <unistd.h>
 
-#include "mkpty.h"
+#include "child.h"
 
 // struct d_window {
 //   int ptmx; // fd
@@ -14,17 +15,7 @@
 // }
 
 int main(int argc, char **argv) {
-  pid_t pid;
-  switch (pid = forkmkpty()) {
-  case -1:
-    perror("forkmkpty");
-    break;
-  case 0:
-    printf("fork: children\n");
-    break;
-  default:
-    printf("fork: parent\n");
-    break;
-  }
+  struct d_child child;
+  spawnchild(&child);
   return EXIT_SUCCESS;
 }