--- mc-4.6.1/src/subshell.c.1	2005-06-07 13:19:19.000000000 +0400
+++ mc-4.6.1/src/subshell.c	2006-05-01 15:04:51.000000000 +0400
@@ -91,6 +91,9 @@
 TRUE;
 #endif
 
+/* Don't allow ctrl+o (panels ON) if shell already dunning a command: */
+int subshell_blocks_ctrlo=1;
+
 /* File descriptor of the pseudoterminal used by the subshell */
 int subshell_pty = 0;
 
@@ -894,7 +897,7 @@
     fd_set read_set;		/* For `select' */
     int maxfdp;
     int bytes;			/* For the return value from `read' */
-    int i;			/* Loop counter */
+    int i,j;			/* Loop counter */
 
     struct timeval wtime;	/* Maximum time we wait for the subshell */
     struct timeval *wptr;
@@ -992,6 +995,18 @@
 		exit (1);
 	    }
 
+	    if (subshell_blocks_ctrlo) {
+		if (pty_buffer[0] == subshell_switch_key &&
+		    subshell_ready == TRUE) {
+		    	    subshell_state = INACTIVE;
+		    	    return TRUE;
+                	}
+		    // remove ctrl+o codes from buffer:
+		    for (i = 0,j = 0; i < bytes; ++i)
+			if (pty_buffer[i] != subshell_switch_key)
+                    	    pty_buffer[j++] = pty_buffer[i];
+		    bytes = j;
+            } else {
 	    for (i = 0; i < bytes; ++i)
 		if (pty_buffer[i] == subshell_switch_key) {
 		    write (subshell_pty, pty_buffer, i);
@@ -1000,6 +1015,7 @@
 		    return TRUE;
 		}
 
+	    }
 	    write (subshell_pty, pty_buffer, bytes);
 	    subshell_ready = FALSE;
 	} else {