Restore previously discarded (and incomplete) OS9 backend files.

src/os9.h

@@ -0,0 +1,10 @@
+/*  $Revision: 1.1 $
+**
+**  Editline system header file for OS-9 (on 68k).
+*/
+
+#define CRLF		"\r\l"
+#define FORWARD		extern
+
+#include <dir.h>
+typedef struct direct	DIRENTRY;

src/sysos9.c

@@ -0,0 +1,46 @@
+/*  $Revision: 1.1 $
+**
+**  OS-9 system-dependant routines for editline library.
+*/
+#include "editline.h"
+#include <sgstat.h>
+#include <modes.h>
+
+
+void
+rl_ttyset(Reset)
+    int			Reset;
+{
+    static struct sgbuf	old;
+    struct sgbuf	new;
+
+
+    if (Reset == 0) {
+        _gs_opt(0, &old);
+        _gs_opt(0, &new);
+        new.sg_backsp = 0;	new.sg_delete = 0;	new.sg_echo = 0;
+        new.sg_alf = 0;		new.sg_nulls = 0;	new.sg_pause = 0;
+        new.sg_page = 0;	new.sg_bspch = 0;	new.sg_dlnch = 0;
+        new.sg_eorch = 0;	new.sg_eofch = 0;	new.sg_rlnch = 0;
+        new.sg_dulnch = 0;	new.sg_psch = 0;	new.sg_kbich = 0;
+        new.sg_kbach = 0;	new.sg_bsech = 0;	new.sg_bellch = 0;
+        new.sg_xon = 0;		new.sg_xoff = 0;	new.sg_tabcr = 0;
+        new.sg_tabsiz = 0;
+        _ss_opt(0, &new);
+        rl_erase = old.sg_bspch;
+        rl_kill = old.sg_dlnch;
+        rl_eof = old.sg_eofch;
+        rl_intr = old.sg_kbich;
+        rl_quit = -1;
+    }
+    else
+        _ss_opt(0, &old);
+}
+
+void
+rl_add_slash(path, p)
+    char	*path;
+    char	*p;
+{
+    (void)strcat(p, access(path, S_IREAD | S_IFDIR) ? " " : "/");
+}