troff(1) -- Linux man page



troff - the troff processor of the groff text formatting system  


troff [ -abcivzCERU ] [ -d cs ] [ -f fam ] [ -F dir ] [ -m name ] [ -M dir ] [ -n num ] [ -o list ] [ -r cn ] [ -T name ] [ -w name ] [ -W name ] [ files... ]
It is possible to have whitespace between a command line option and its parameter.  


This manual page describes the GNU version of troff. It is part of the groff document formatting system. It is functionally compatible with UNIX troff, but has many extensions, see groff_diff(7). Usually it should be invoked using the groff(1) command which will also run preprocessors and postprocessors in the appropriate order and with the appropriate options.  


Generate an ASCII approximation of the typeset output.
Print a backtrace with each warning or error message. This backtrace should help track down the cause of the error. The line numbers given in the backtrace may not always be correct, for troff's idea of line numbers gets confused by as or am requests.
Disable color output (always disabled in compatibility mode).
Enable compatibility mode.

Define c or name to be a string s; c must be a one letter name.
Inhibit all error messages of troff. Note that this doesn't affect messages output to standard error by macro packages using the tm or tm1 requests.
Use fam as the default font family.
Search in directory (or directory path) dir for subdirectories devname (name is the name of the device) and there for the DESC file and font files. dir is scanned before all other font directories.
Read the standard input after all the named input files have been processed.
Read in the file name.tmac. If it isn't found, try instead. It will be first searched for in directories given with the -M command line option, then in directories given in the GROFF_TMAC_PATH environment variable, then in the current directory (only if in unsafe mode), the home directory, /usr/lib/groff/site-tmac, /usr/share/groff/site-tmac, and /usr/share/groff/
Search directory (or directory path) dir for macro files. This is scanned before all other macro directories.
Number the first page num.
Output only pages in list, which is a comma-separated list of page ranges; n means print page n, m-n means print every page between m and n, -n means print every page up to n, n- means print every page from n. troff will exit after printing the last page in the list.

Set number register c or name to n; c must be a one character name; n can be any troff numeric expression.
Don't load troffrc and troffrc-end.
Prepare output for device name, rather than the default ps.
Unsafe mode. This will enable the following requests: open, opena, pso, sy, and pi. For security reasons, these potentially dangerous requests are disabled otherwise. It will also add the current directory to the macro search path.
Print the version number.
Enable warning name. Available warnings are described in the section WARNINGS below. For example, to enable all warnings, use -w all. Multiple -w options are allowed.
Inhibit warning name. Multiple -W options are allowed.
Suppress formatted output.


The warnings that can be given by troff are divided into the following categories. The name associated with each warning is used by the -w and -W options; the number is used by the warn request, and by the .warn register; it is always a power of 2 to allow bitwise composition.