набор текста и форматирование документов GNU roff (GNU roff typesetter and document formatter)
Окружение (Environment)
GROFF_FONT_PATH and GROFF_TMAC_PATH each accept a search path of
directories; that is, a list of directory names separated by the
system's path component separator character. On Unix systems,
this character is a colon (:); on Windows systems, it is a
semicolon (;).
GROFF_FONT_PATH
A list of directories in which to seek the selected output
device's directory of device and font description files.
troff will scan directories given as arguments to any
specified -F options before these, then in a site-specific
directory (/usr/local/share/groff/site-font), a standard
location (/usr/local/share/groff/1.23.0/font), and a
compatibility directory (/usr/lib/font) after them.
GROFF_TMAC_PATH
A list of directories in which to search for macro files.
troff will scan directories given as arguments to any
specified -M options before these, then the current
directory (only if in unsafe mode), the user's home
directory, a platform-specific directory (/usr/local/lib/
groff/site-tmac), a site-specific directory (/usr/local/
share/groff/site-tmac), and a standard location (/usr/
local/share/groff/1.23.0/tmac) after them.
GROFF_TYPESETTER
Set the default output device. If empty or not set, 'ps'
is used. The -T option overrides GROFF_TYPESETTER.
SOURCE_DATE_EPOCH
A timestamp (expressed as seconds since the Unix epoch) to
use as the creation timestamp in place of the current
time. The time is converted to human-readable form using
ctime(3) when the formatter starts up and stored in
registers usable by documents and macro packages.
TZ The timezone to use when converting the current time (or
value of SOURCE_DATE_EPOCH) to human-readable form; see
tzset(3).
