# etex

ETEX(1)                                                                ETEX(1)

## NAME

etex, einitex, evirtex - extended TeX

## SYNOPSIS

etex [options] [& format ] [ file | \ commands ]

## DESCRIPTION

Run  the  e-TeX  typesetter on file, usually creating file.dvi.  If the
file argument has no extension, ".tex" will be appended to it.  Instead
of a filename, a set of e-TeX commands can be given, the first of which
must start with a backslash.  With a &format argument e-TeX uses a dif-
ferent set of precompiled commands, contained in format.fmt; it is usu-
ally better to use the -fmt format option instead.

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 symbolic links  to
the etex executable.  These symbolic links may not exist at all.

e-TeX’s  handling  of  its command-line arguments is similar to that of
the other TeX programs in the web2c implementation.

## OPTIONS

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

-fmt 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.

-enc   Enable  the encTeX extensions.  This option is only effective in
combination with -ini.  For documentation of the  encTeX  exten-
sions see http://www.olsak.net/enctex.html.

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

-no-file-line-error
Disable printing error messages in the file:line:error style.

-file-line-error-style
This is the old name of the -file-line-error option.

-halt-on-error
Exit with an error code when an error is encountered during pro-
cessing.

-help  Print help message and exit.

-ini   Start  in INI mode, which is used to dump formats.  The INI mode
can be used for typesetting, but no  format  is  preloaded,  and
basic initializations like setting catcodes may be required.

-interaction mode
Sets  the  interaction  mode.  The mode can be either 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.

-mktex fmt
Enable mktexfmt, where fmt must be either tex or tfm.

-mltex Enable MLTeX extensions.  Only  effective  in  combination  with
-ini.

-no-mktex fmt
Disable mktexfmt, where fmt must be either tex or tfm.

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

-output-directory directory
directory instead of the current directory.  Look up input files
in directory first, the along the normal search path.

-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.

-no-parse-first-line
Disable parsing of the first line of the main input file.

-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
shell command.  This construct is normally disallowed for  secu-
rity reasons.

-no-shell-escape
Disable  the  \write18{command} construct, even if it is enabled
in the texmf.cnf file.

-src-specials
Insert source specials into the DVI file.

-src-specials where
Insert source specials in certain placed of the DVI file.  where
is  a  comma-separated value list: cr, display, hbox, math, par,
parent, or vbox.

-translate-file tcxname
Use the tcxname translation table to set the  mapping  of  input
characters and re-mapping of output characters.

-default-translate-file tcxname
Like  -translate-file  except  that  a %& line can overrule this
setting.

-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 etex 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.

TEXFORMATS
Search path for format files.

TEXPOOL
search path for etex internal strings.

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

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

## FILES

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

etex.pool
Text file containing e-TeX’s internal strings.

texfonts.map
Filename mapping definitions.

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

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

## NOTES

This manual page is not meant to be exhaustive.  The complete  documen-
tation for this version of e-TeX can be found in the info manual Web2C:
A TeX implementation.

## 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.

tex(1), mf(1).

## AUTHORS

e-TeX was developed by Peter Breitenlohner (and the NTS team).

TeX was designed by Donald E. Knuth, who implemented it using his  sys-
tem  for  Pascal programs.  It was ported to Unix at Stanford by Howard
Trickey, and at Cornell by Pavel Curtis.  The version now offered  with
the  Unix  TeX  distribution  is  that  generated  by  the  to C system
(web2c), originally written by Tomas Rokicki and Tim Morgan.

The encTeX extensions were written by Petr Olsak.

Web2C 7.5.4                     21 August 2004                         ETEX(1)

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