# elatex

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 complete documen-
tation 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 perpet-
uate 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.

--file-line-error-style
Print error messages in the form file:line:error which is  simi-
lar to the way many compilers format them.

--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  errorstopmode.   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.

--jobname name
Use  name for the job name, instead of deriving it from the name
of the input file.

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.

--parse-first-line
If the first line of the main input file begins with %& parse it
to look for a dump name or a --translate-file option.

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

--recorder
Enable  the filename recorder.  This leaves a trace of the files
opened for input and output in a file with extension .fls.

--shell-escape
Enable the \write18{command} construct.  The command can be  any
Bourne shell command.  This construct 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  specifications’
node)  for  precise  details of how the environment 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 current  directory.
If  any  output file cannot be opened there, it tries to open it
in the directory specified in the environment variable TEXMFOUT-
PUT.  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
files.   An empty path component will be replaced with the paths
defined in the texmf.cnf file.  For example,  set  TEXINPUTS  to
".:/home/usr/tex:"   to   prepend   the   current  direcory  and
‘‘/home/user/tex’’ to the standard search path.

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 system 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 implements a number of optional  extensions.   In
fact,  many  of these extensions conflict to a greater or lesser extent
with the definition of e-TeX.  When such extensions  are  enabled,  the
banner  printed when e-TeX starts is changed to print e-TeXk instead of
e-TeX.

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.