CHECKNR(1) General Commands Manual CHECKNR(1)
checknr – check nroff/troff files
checknr [-a.x1.y1.x2.y2. ... .xn.yn] [-c.x1.x2.x3 ... .xn] [-s] [-f] file
The checknr utility checks a list of nroff(1) or troff(1) input files for
certain kinds of errors involving mismatched opening and closing delimiters
and unknown commands. If no files are specified, checknr checks the
The following options are available:
-a Add additional pairs of macros to the list of known macros. This
must be followed by groups of six characters, each group defining a
pair of macros. The six characters are a period, the first macro
name, another period, and the second macro name. For example, to
define a pair .BS and .ES, use ‘-a.BS.ES’
-c Define commands which would otherwise be complained about as
-f Request checknr to ignore ‘\f’ font changes.
-s Ignore ‘\s’ size changes.
Delimiters checked are:
1. Font changes using \fx ... \fP.
2. Size changes using \sx ... \s0.
3. Macros that come in open ... close forms, for example, the .TS and .TE
macros which must always come in pairs.
The checknr utility is intended for use on documents that are prepared with
checknr in mind, much the same as lint(1). It expects a certain document
writing style for ‘\f’ and ‘\s’ commands, in that each ‘\fx’ must be
terminated with ‘\fP’ and each ‘\sx’ must be terminated with ‘\s0’. While
it will work to directly go into the next font or explicitly specify the
original font or point size, and many existing documents actually do this,
such a practice will produce complaints from checknr. Since it is probably
better to use the ‘\fP’ and ‘\s0’ forms anyway, you should think of this as
a contribution to your document preparation style.
The checknr utility knows about the ms(7) and me(7) macro packages.
nroff(1), troff(1), me(7), ms(7)
Complaints about unmatched delimiters. Complaints about unrecognized
commands. Various complaints about the syntax of commands.
There is no way to define a 1 character macro name using -a.
Does not correctly recognize certain reasonable constructs, such as
The checknr command appeared in 4.0BSD.
macOS 12.1 June 6, 1993 macOS 12.1