The behavior of the DVI translators can be influenced by
definition of logical names on and , or
environment variables in and . Compiled-in
internal defaults will be provided for any of these which are not
defined. They must be entirely in upper-case, since that
is conventional on systems. The names currently recognized
are as follows:
- DVIHELP
- This variable defines an alternate help string which is
typed when the user makes an input error. It should
direct the user to additional documentation. For
example, on , it might be try HELP
DVI or XINFO DVI.
- FONTLIST
- Normally, the drivers are prepared to search
first for .pk, then .gf, then .pxl font files. This variable can be used to
change this search order, or remove one or more
of the possibilities. It is expected to contain
at least one of the strings PK, GF,
or PXL, possibly separated by arbitrary
punctuation and other text. Letter case is not significant. Some acceptable
strings are PXL-then-PK-then-GF, PK-GF, PXL, and PXL/GF/PK.
- TERM
- This variable is used only for DVIBIT; if it does
not evaluate to either bitgraph or bg, DVIBIT will refuse to run. On , this
is the conventional way of defining terminal
types with the TERMCAP or TERMINFO systems. This
variable is ignored on , since the
C library sets it to a value which can
never be bitgraph or bg.
- TEXFONTS
- This defines the directory path for finding font files.
Its value is prepended to the name of a
TEX font to get
a full file specification. For example, font
cmr10 on a 300-dot/inch device might
correspond on to the files
texfonts:cmr10.300gf,
texfonts:cmr10.300pk, or
texfonts:cmr10.300pxl.
- TEXINPUTS
- This defines the directory path for finding files which
are not in the current working directory.
It is prepended to file names.