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TECO for Ultrix			Matt Fichtenbaum  3/27/86  revised 7/25/86

     These notes describe briefly what it is and how to make it.

     Ultrix TECO is an editor that is mostly compatible with DEC
Standard TECO.  It is written in C to run under Ultrix (and other
Unix (tm) implementations, e.g., it has compiled and run on a Sun
workstation).  It implements all the editor functions of DEC TECO
and it has some additional features suited to the Unix environment,
such as the ability to execute Unix commands or to pass text from
TECO's buffer through a Unix process and incorporate the result
into the text buffer.  It lacks some of the display support features
of Standard TECO, but includes the split-screen "window" mode
suitable for using "raw" TECO.

     Note that TECO's CRT routines are hard-coded for a VT100-type
terminal.  Using another type of terminal requires changing these
routines.

     Ultrix TECO consists of twelve source files:

	te_defs.h	definitions file #include'd by the .c files
	te_data.c	"common" data
	te_main.c	main program
	te_rdcmd.c	read commands and build the command string
	te_exec0.c	exec commands 1 (initial dispatch & expressions)
	te_exec1.c	exec commands 2 (most commands)
	te_exec2.c	exec commands 3 (E, F commands, file I/O, Unix extensions)
	te_srch.c	search operations
	te_window.c	CRT display routines
	te_chario.c	terminal I/O, interaction with tty driver, signals
	te_subs.c	higher level subroutines
	te_utils.c	lower level subroutines

TECO is built as follows:

	1. Compile all the .c files with cc -c -O <file>.c

	2. Link all the object files with cc -o te *.o

Note that TECO catches the "interrupt" (^C) signal; this may cause problems when
using dbx.  This can be circumvented by compiling te_chario.c with the symbol
DEBUG defined, i.e.,

	cc -c -g -DDEBUG te_chario.c

(naturally, the -g flag should be specified to all the cc commands
if dbx is to be used).


There are two 'makefiles.'  'makefile' makes 'te' as above; 'makefile.x'
makes 'te' and 'tex' for use with dbx.  'tex' compiles te_chario.c with
the DEBUG flag set.  Because 'makefile.x' compiles with -g and 'makefile'
doesn't, the two ought not to share the same directory.

NOTE: makefile.x is set up to make the -DDEBUG version of te_chario.o
under the name te_chx.o.  The source directory should contain te_chx.c
as a symbolic link to te_chario.c.

	The file .tecorc illustrates one possible startup.  It implements
'te file' to mean

	%te
	*ebfile$y5,7:w$$