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CHECKNR(1)                   BSD Reference Manual                   CHECKNR(1)

NAME
     checknr - check nroff/troff files

SYNOPSIS
     checknr [-a.x1.y1.x2.y2. ... .xn.yn] [-c.x1.x2.x3 ... .xn] [-s] [-f] file

DESCRIPTION
     Checknr 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 standard
     input.

     Options:

     -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 exam-
             ple, to define a pair .BS and .ES, use `-a.BS.ES'

     -c      Define commands which would otherwise be complained about as un-
             defined.

     -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.

     Checknr 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 bet-
     ter to use the `\fP' and `\s0' forms anyway, you should think of this as
     a contribution to your document preparation style.

     Checknr knows about the ms(7) and me(7) macro packages.

SEE ALSO
     nroff(1),  troff(1),  checkeq(1),  ms(7),  me(7)

DIAGNOSTICS
     Complaints about unmatched delimiters.  Complaints about unrecognized
     commands.  Various complaints about the syntax of commands.

BUGS
     There is no way to define a 1 character macro name using -a.

     Does not correctly recognize certain reasonable constructs, such as con-
     ditionals.

HISTORY
     The checknr command appeared in 4.0BSD.