nl(1)                          DG/UX R4.11MU05                         nl(1)


NAME
       nl - line numbering filter

SYNOPSIS
       nl [-btype] [-ftype] [-htype] [-vstart#] [-iincr] [-p] [-lnum]
       [-ssep] [-wwidth] [-nformat] [-ddelim] [file]

DESCRIPTION
       nl reads lines from the named file, or the standard input if no file
       is named, and reproduces the lines on the standard output.  Lines are
       numbered on the left in accordance with the command options in
       effect.

       nl views the text it reads in terms of logical pages.  Line numbering
       is reset at the start of each logical page.  A logical page consists
       of a header, a body, and a footer section.  Empty sections are valid.
       Different line numbering options are independently available for
       header, body, and footer.  For example, -bt (the default) numbers
       non-blank lines in the body section and does not number any lines in
       the header and footer sections.

       The start of logical page sections are signaled by input lines
       containing nothing but the following delimiter character(s):

                 Line contents  Start of

                 \:\:\:         header

                 \:\:           body

                 \:             footer

       Unless optioned otherwise, nl assumes the text being read is in a
       single logical page body.

       Command options may appear in any order and may be intermingled with
       an optional file name.  Only one file may be named.  The options are:

       -btype    Specifies which logical page body lines are to be numbered.
                 Recognized types and their meanings are:

                 a    number all lines
                 t    number lines with printable text only
                 n    no line numbering
                 pexp number only lines that contain the regular expression
                      specified in exp (see ed(1))

                 Default type for logical page body is t (text lines
                 numbered).  All characters from supplementary code sets are
                 considered printable.

       -ftype    Same as -btype except for footer.  Default type for logical
                 page footer is n (no lines numbered).

       -htype    Same as -btype except for header.  Default type for logical
                 page header is n (no lines numbered).  All characters from
                 supplementary code sets are considered printable.

       -vstart#  start# is the initial value used to number logical page
                 lines.  Default start# is 1.

       -iincr    incr is the increment value used to number logical page
                 lines.  Default incr is 1.

       -p        Do not restart numbering at logical page delimiters.

       -lnum     num is the number of blank lines to be considered as one.
                 For example, -l2 results in only the second adjacent blank
                 being numbered (if the appropriate -ha, -ba, and/or -fa
                 option is set).  Default num is 1.

       -ssep     sep is the character(s) used in separating the line number
                 and the corresponding text line.  Default sep is a tab.
                 Characters used for sep must be single-byte characters.

       -wwidth   width is the number of characters to be used for the line
                 number.  Default width is 6.

       -nformat  format is the line numbering format.  Recognized values
                 are: ln, left justified, leading zeroes suppressed; rn,
                 right justified, leading zeroes suppressed; rz, right
                 justified, leading zeroes kept.  Default format is rn
                 (right justified).

       -ddelim   The two delimiter characters specifying the start of a
                 logical page section may be changed from the default
                 characters (\:) to two user-specified characters.  If only
                 one character is entered, the second character remains the
                 default character (:).  No space should appear between the
                 -d and the delimiter characters.  To enter a backslash, use
                 two backslashes.  Characters used for delim must be single-
                 byte characters.

   International Features
       nl can process files containing characters from supplementary code
       sets.  Searches are performed on characters, not on bytes.

EXAMPLE
       The command:

                 nl -v10 -i10 -d!+ file1

       will cause the first line of the page body to be numbered 10, the
       second line of the page body to be numbered 20, the third 30, and so
       forth.  The logical page delimiters are !+.

SEE ALSO
       pr(1), ed(1).


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