screen areas invalidation

1 files changed, 30 insertions, 23 deletions

diff --git a/userspace/xterm/xterm.c b/userspace/xterm/xterm.c
index b333794..5540ac9 100644
--- a/userspace/xterm/xterm.c
+++ b/userspace/xterm/xterm.c
@@ -8,49 +8,56 @@ char *argv1[]={"xterm","/bin/fsh",0};
 
 int main(int argc, char **argv)
 {
+    // we need a window
     _gui_win();
 
+    // basically loads font and sets a few constants
     vesa_init(NULL);
+
+    // init tty and set vesa output funcs
     void *tty=terminal_init_vesa();
 
     //int xterm_in[2];
     int xterm_out[2];
 
     //_pipe(xterm_in);
-    _pipe(xterm_out);
+    pipe(xterm_out);
 
-    int pid=_fork();
+    int pid=fork();
 
-    if(!pid)
+    if(!pid) // child
     {
             int tty_fd=_open("/dev/tty");
 
             //_close(xterm_in[1]);
-            _close(xterm_out[0]);
+            close(xterm_out[0]);
 
-            _dup2(tty_fd,0);// stdin
-            _dup2(xterm_out[1],1);// stdout
-            _dup2(xterm_out[1],2);// stderr
+            dup2(tty_fd,0);// stdin
+            dup2(xterm_out[1],1);// stdout
+            dup2(xterm_out[1],2);// stderr
 
              // replace process with our foolshell or whatever
             if(argc==1)_execve(argv1[1],argv1,environ); 
-            _execve(argv[1],argv,environ);
+            execve(argv[1],argv,environ);
             
-            while(1);
+            printf("unable to execve %s",argv[1]); // never reached
     }
-
-    //_close(xterm_in[0]);
-    _close(xterm_out[1]);
-
-    //_dup2(xterm_in[1],0); // compositor writes here.
-    //_close(xterm_in[1]);
-
-    while(1)
-    {
-        char buf[1];
-
-        _read(xterm_out[0],buf,1); // show what foolshell writes to its stdout/stderr
-        terminal_put(tty,buf[0]);
-        _gui_rect(); 
+    else{
+
+        //_close(xterm_in[0]);
+        close(xterm_out[1]);
+
+        //_dup2(xterm_in[1],0); // compositor writes here.
+        //_close(xterm_in[1]);
+        
+        // TODO quit if execve fails or child exits...
+        while(1)
+        {
+            char buf[1];
+
+            read(xterm_out[0],buf,1); // show what foolshell writes to its stdout/stderr
+            terminal_put(tty,buf[0]);
+        }
     }
+
 }