ETEX(1)                                                   ETEX(1)

NAME
etex, einitex, evirtex - extended TeX

SYNOPSIS
etex [options] [commands]

DESCRIPTION
This  manual page is not meant to be exhaustive.  The com-
plete documentation for this version of TeX can  be  found
in the info file or manual Web2C: A TeX implementation.

e-TeX  is  the  first  concrete result of an international
research & development project, the NTS Project, which was
established under the aegis of DANTE e.V. during 1992. The
aims of the project are  to  perpetuate  and  develop  the
spirit  and  philosophy  of TeX, whilst respecting Knuth's
wish that TeX should remain frozen.

e-TeX can be used in two different modes: in compatibility
mode  it  is supposed to be completely interchangable with
standard TeX.  In extended mode several new primitives are
added  that  facilitate (among other things) bidirectional
typesetting.

An extended mode format is generated by prefixing the name
of  the  source  file for the format with an asterisk (*).
Such formats are often prefixed with an `e', hence etex as
the  extended  version  of  tex and elatex as the extended
version of latex.  However, eplain is an exception to this
rule.

The  einitex and evirtex commands are e-TeX's analogues to
the initex and virtex  commands.   In  this  installation,
they are symlinks to the etex executable.

e-TeX's  handling of its command-line arguments is similar
to that of TeX.

OPTIONS
This version of e-TeX understands  the  following  command
line options.

--efmt format
Use  format  as  the name of the format to be used,
instead of the name by which e-TeX was called or  a
%& line.

--help Print help message and exit.

--ini  Be einitex, for dumping formats; this is implicitly
true if the program is called as einitex.

--interaction mode
Sets the interaction mode.  The mode can be one  of
batchmode,  nonstopmode, scrollmode, and errorstop-
mode.  The meaning of these modes is  the  same  as
that of the corresponding \commands.

--ipc  Send  DVI  output  to a socket as well as the usual
output file.  Whether this option is  available  is
the choice of the installer.

--ipc-start
As --ipc, and starts the server at the other end as
well.  Whether this  option  is  available  is  the
choice of the installer.

Sets  path  searching  debugging flags according to
the bitmask.  See the Kpathsea manual for  details.

--maketex fmt
Enable  mktexfmt,  where  fmt must be one of tex or
tfm.

--mltex
Enable MLTeX extensions.

--no-maketex fmt
Disable mktexfmt, where fmt must be one of  tex  or
tfm.

--output-comment string
Use  string for the DVI file comment instead of the
date.

--progname name
Pretend to be program name.  This affects both  the
format used and the search paths.

--shell-escape
Enable  the  \write18{command} construct.  The com-
mand can be any Bourne shell  command.   This  con-
struct is normally disallowed for security reasons.

--translate-file tcxname
Use the tcxname translation table.

--version
Print version information and exit.

ENVIRONMENT
See the Kpathsearch library documentation (the `Path spec-
ifications'  node) for precise details of how the environ-
ment variables are used.  The  kpsewhich  utility  can  be
used to query the values of the variables.

One  caveat:  In most e-TeX formats, you cannot use ~ in a
filename you give directly  to  e-TeX,  because  ~  is  an
active character, and hence is expanded, not taken as part
of the filename.  Other programs, such as Metafont, do not
have this problem.

TEXMFOUTPUT
Normally,  e-TeX  puts its output files in the cur-
rent directory.   If  any  output  file  cannot  be
opened  there, it tries to open it in the directory
specified in the environment variable  TEXMFOUTPUT.
There  is  no default value for that variable.  For
example, if you  say  tex  paper  and  the  current
directory  is  not writable, if TEXMFOUTPUT has the
value /tmp, e-TeX attempts to create /tmp/paper.log
(and /tmp/paper.dvi, if any output is produced.)

TEXINPUTS
Search  path  for  \input  and \openin files.  This
should probably start  with  ``.'',  so  that  user
files are found before system files.

TEXFONTS
Search path for font metric (.tfm) files.

TEXFORMATS
Search path for format files.

TEXPOOL
search path for einitex internal strings.

TEXEDIT
Command  template  for  switching  to  editor.  The
default, usually vi, is set when e-TeX is compiled.

FILES
The location of the files mentioned below varies from sys-
tem to system.  Use the kpsewhich utility  to  find  their
locations.

etex.pool
Encoded text of e-TeX's messages.

texfonts.map
Filename mapping definitions.

*.tfm  Metric files for e-TeX's fonts.

*.efmt Predigested e-TeX format (.efmt) files.

BUGS
This  version  of  e-TeX fails to trap arithmetic overflow
when dimensions are added or subtracted.  Cases where this
occurs  are  rare, but when it does the generated DVI file
will be invalid.