erts: Re-Implement shell using nif

This commit re-implements the entire tty driver for both Unix
and Windows to use a common nif instead of two seperate drivers.

The Unix implementation works pretty much as it did before only that
a lot more of the terminal logic has been moved from Erlang to C.

The windows implementation now uses Windows Terminal Sequences, i.e.
the same sequences as most Unixes to control the terminal. This means
that werl.exe is no longer needed and erl.exe will have the "newshell"
with all the features normally only found on Unix.

The new implementation also uses dirty I/O threads for all I/O which
means that it can leave the FDs in blocking mode. This fixes problems
when the Erlang tty is interacting with other systems such as bash.

Closes #3150
Closes #3390
Closes #4343

HOWTO/INSTALL-WIN32.md

@@ -68,7 +68,7 @@ This is the short story though, for the experienced and impatient:
         <http://www.erlang.org/download.html>) and unpack with `tar`
         to the windows disk for example to: /mnt/c/src/
 
-    *   Install mingw-gcc, and make: `sudo apt install g++-mingw-w64 gcc-mingw-w64 make`
+    *   Install mingw-gcc, and make: `sudo apt update && sudo apt install g++-mingw-w64 gcc-mingw-w64 make`
 
     *   `$ cd UNPACK_DIR`
 
@@ -150,7 +150,7 @@ the different tools:
     Install into `C:/OpenSSL-Win64` (or `C:/OpenSSL-Win32`)
 
 *   wxWidgets (optional)
-    You need this to build wx and use gui's in debugger and observer.
+    You need this to build wx to use gui's in debugger and observer.
 
     We recommend v3.1.4 or later.
     Unpack into `c:/opt/local64/pgm/wxWidgets-3.1.4`

erts/Makefile

@@ -86,10 +86,8 @@ local_setup:
 		cp $(ERL_TOP)/bin/$(TARGET)/erlc.exe $(ERL_TOP)/bin/erlc.exe; \
 		cp $(ERL_TOP)/bin/$(TARGET)/erl.exe $(ERL_TOP)/bin/erl.exe; \
 		cp $(ERL_TOP)/bin/$(TARGET)/erl_call.exe $(ERL_TOP)/bin/erl_call.exe; \
-		cp $(ERL_TOP)/bin/$(TARGET)/werl.exe $(ERL_TOP)/bin/werl.exe; \
 		cp $(ERL_TOP)/bin/$(TARGET)/escript.exe $(ERL_TOP)/bin/escript.exe; \
-	 	chmod 755 $(ERL_TOP)/bin/erl.exe $(ERL_TOP)/bin/erlc.exe \
-			 $(ERL_TOP)/bin/werl.exe; \
+	 	chmod 755 $(ERL_TOP)/bin/erl.exe $(ERL_TOP)/bin/erlc.exe; \
 		make_local_ini.sh $(ERL_TOP); \
 		cp $(ERL_TOP)/bin/erl.ini $(ERL_TOP)/bin/$(TARGET)/erl.ini; \
 	else \

erts/doc/src/erlsrv_cmd.xml

@@ -112,8 +112,7 @@
       <item>
         <p>The location of the Erlang emulator.
           The default is the <c><![CDATA[erl.exe]]></c> located in the same
-          directory as <c>erlsrv.exe</c>. Do not specify
-          <c><![CDATA[werl.exe]]></c> as this emulator, it will not work.</p>
+          directory as <c>erlsrv.exe</c>.</p>
         <p>If the system uses release handling, this is to be set to a
           program similar to <c><![CDATA[start_erl.exe]]></c>.</p>
       </item>

erts/emulator/Makefile.in

@@ -1129,6 +1129,7 @@ RUN_OBJS += \
 LTTNG_OBJS = $(OBJDIR)/erlang_lttng.o
 
 NIF_OBJS = \
+	$(OBJDIR)/prim_tty_nif.o \
 	$(OBJDIR)/erl_tracer_nif.o \
 	$(OBJDIR)/prim_buffer_nif.o \
 	$(OBJDIR)/prim_file_nif.o \
@@ -1139,10 +1140,8 @@ ifeq ($(TARGET),win32)
 DRV_OBJS = \
 	$(OBJDIR)/registry_drv.o \
 	$(OBJDIR)/inet_drv.o \
-	$(OBJDIR)/ram_file_drv.o \
-	$(OBJDIR)/ttsl_drv.o
+	$(OBJDIR)/ram_file_drv.o
 OS_OBJS = \
-	$(OBJDIR)/win_con.o \
 	$(OBJDIR)/dll_sys.o \
 	$(OBJDIR)/driver_tab.o \
 	$(OBJDIR)/sys_float.o \
@@ -1166,8 +1165,7 @@ OS_OBJS = \
 
 DRV_OBJS = \
 	$(OBJDIR)/inet_drv.o \
-	$(OBJDIR)/ram_file_drv.o \
-	$(OBJDIR)/ttsl_drv.o
+	$(OBJDIR)/ram_file_drv.o
 endif
 
 ifneq ($(STATIC_NIFS),no)

erts/emulator/beam/break.c

@@ -581,7 +581,7 @@ do_break(void)
     /* check if we're in console mode and, if so,
        halt immediately if break is called */
     mode = erts_read_env("ERL_CONSOLE_MODE");
-    if (mode && sys_strcmp(mode, "window") != 0)
+    if (mode && sys_strcmp(mode, "detached") == 0)
 	erts_exit(0, "");
     erts_free_read_env(mode);
 #endif /* __WIN32__ */