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OMEGA(1)                                                              OMEGA(1)



NAME
       omega, iniomega, viromega - extended unicode TeX

SYNOPSIS
       omega [options] [& format ] [ file | \ commands ]

DESCRIPTION
       Run  the  Omega  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 Omega commands can be given, the first of  which  must
       start  with a backslash.  With a &format argument Omega uses a different set of precompiled commands, contained
       in format.fmt; it is usually better to use the -fmt format option instead.

       Omega is a version of the TeX program modified for multilingual typesetting.  It uses unicode,  and  has  addi-
       tional primitives for (among other things) bidirectional typesetting.

       The  iniomega and viromega commands are Omega's analogues to the initex and virtex commands.  In this installa-
       tion, they are symlinks to the omega executable.

       Omega's command line options are similar to those of TeX.

       Omega is experimental software.

OPTIONS
       This version of Omega understands the following command line options.

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

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

       --help Print help message and exit.

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

       --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.

       --kpathsea-debug bitmask
              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.

       --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.

       -output-directory directory
              directory instead of the current directory.  Look up input files in directory first, the along the  nor-
              mal search path.

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

       --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 .ofl.  (This option is always on.)

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

       --version
              Print version information and exit.

ENVIRONMENT
       See the Kpathsearch library documentation (the 'Path specifications' node) for precise details of how the envi-
       ronment variables are used.  The kpsewhich utility can be used to query the values of the variables.

       One caveat: In most Omega formats, you cannot use ~ in a filename you give directly to Omega, 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, Omega 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 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,  Omega  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.   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.

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

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

       omega.pool
              Encoded text of Omega's messages.

       *.oft  Predigested Omega format (.oft) files.

NOTES
       This manual page is not meant to be exhaustive.  The complete documentation for this version of  Omega  can  be
       found in the info manual Web2C: A TeX implementation.

BUGS
       This  version  of Omega implements a number of optional extensions.  In fact, many of these extensions conflict
       to a greater or lesser extent with the definition of Omega.  When  such  extensions  are  enabled,  the  banner
       printed when Omega starts is changed to print Omegak instead of Omega.

       This  version  of Omega 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.

       The DVI files produced by Omega may use extensions which make them incompatible with most software designed  to
       handle DVI files.  In order to print or preview them, you should use odvips to generate a PostScript file.

       Omega  is experimental software, and if you are an active user it is strongly recommended that you subscribe to
       the Omega mailing list.  Visit the Omega website http://omega.cse.unsw.edu.au for information on  how  to  sub-
       scribe.

SEE ALSO
       tex(1), mf(1), odvips(1),

AUTHORS
       The primary authors of Omega are John Plaice and Yannis Haralambous.



Web2C 7.5.6                    27 December 1997                       OMEGA(1)