Made posix terminal IO avoid spin looping.

Using raw mode + delay in the right places to
allow tasks to work while also supporting key?

common/forth_namespace_tests.fs

@@ -458,6 +458,7 @@ e: check-ansi
 e: check-tasks
   out: start-task 
   out: task 
+  out: pause? 
   out: pause 
   out: tasks 
 ;e
@@ -566,13 +567,13 @@ e: test-windows-forth-namespace
 e: test-posix-forth-voclist
   internals ' sockets voclist-from
   out: sockets 
+  out: termios 
   out: internals 
   out: graphics 
   out: ansi 
   out: editor 
   out: streams 
   out: tasks 
-  out: termios 
   out: posix 
   out: structures 
   out: internalized 
@@ -589,11 +590,11 @@ e: test-posix-forth-namespace
   out: telnetd 
   out: sockets 
   out: x11 
+  out: form 
+  out: termios 
   check-desktop
   check-filetools
   check-phase2
-  out: form 
-  out: termios 
   check-allocation
   out: ok 
   out: pwd 

common/tasks.fs

@@ -28,6 +28,9 @@ forth definitions tasks also internals
   task-list @ cell+ @ sp! rp!
 ;
 
+( Check if there are other tasks. )
+: pause? ( -- f ) task-list @ dup @ <> ;
+
 : task ( xt dsz rsz "name" )
    create here >r 0 , 0 , ( link, sp )
    swap here cell+ r@ cell+ ! cells allot

posix/posix_boot.fs

@@ -15,10 +15,10 @@
 needs ../common/phase1.fs
 needs posix.fs
 needs allocation.fs
-needs termios.fs
 needs ../common/phase2.fs
 needs ../common/phase_filetools.fs
 needs ../common/phase_desktop.fs
+needs termios.fs
 needs x11.fs
 needs graphics.fs
 needs sockets.fs

posix/termios.fs

@@ -38,12 +38,14 @@ create new-termios sizeof(termios) allot
 : termios@ ( a -- ) stdin swap tcgetattr drop ;
 : termios! ( a -- ) stdin TCSAFLUSH rot tcsetattr throw ;
 old-termios termios@
-: raw-mode   new-termios termios@
+: raw-mode   stdin isatty 0= if exit then
+             new-termios termios@
              _ECHO ICANON or invert new-termios .c_lflag sl@ and new-termios .c_lflag l!
              0 VTIME new-termios .c_cc[] c!
              0 VMIN new-termios .c_cc[] c!
              new-termios termios! ;
-: normal-mode   old-termios termios! ;
+: normal-mode   stdin isatty 0= if exit then
+                old-termios termios! ;
 
 ( Screen Size )
 $5413 constant TIOCGWINSZ
@@ -53,12 +55,36 @@ create winsize sizeof(winsize) allot
                   winsize sl@ dup $ffff and swap $10000 / ;
 
 0 value pending
-: termios-key? ( -- f ) pending if -1 else stdin-key to pending pending 0<> then ;
+: termios-key? ( -- f )
-: termios-key ( -- n ) begin termios-key? 0= while repeat pending 0 to pending ;
+  pending if
+    -1
+  else
+    nodelay-mode
+    stdin-key to pending
+    pending 0<>
+  then
+;
+: termios-key ( -- n )
+  begin termios-key? 0= while
+    pause? if
+      pause
+    else
+      delay-mode
+      stdin-key to pending
+    then
+  repeat
+  pending 0 to pending
+;
+
+raw-mode
+: termios-terminate ( n -- )
+  normal-mode
+  sysexit
+;
 
-nodelay-mode
 ' termios-key is key
 ' termios-key? is key?
+' termios-terminate is terminate
 
 forth definitions