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 nl 1 "28 Mar 1995" "SunOS 5.11" "User Commands"
 NAME
nl - line numbering filter

 SYNOPSIS


/usr/bin/nl [-p] [-b [type]] [-d [delim]] [-f [type]] 
 [-h [type]] [-i [incr]] [-l [num]] [-n [format]] 
 [-s [sep]] [-w [width]] [-v [startnum]] [file]






/usr/xpg4/bin/nl [-p] [-b type] [-d delim] [-f type] 
 [-h type] [-i incr] [-l num] [-n format] [-s sep] 
 [-w width] [-v startnum] [file]




 DESCRIPTION

The nl utility 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 contentsStart Of
\e:\e:\e:header
\e:\e:body
\e:footer




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

 OPTIONS

Command options may appear in any order and may be intermingled with an
optional file name. Only one file may be named. The specified default is used
when the option is not entered on the command line. /usr/xpg4/bin/nl
options require option arguments. A SPACE character may separate
options from option arguments. /usr/bin/nl options may have option
arguments. If option-arguments of /usr/bin/nl options are not specified,
these options result in the default. The supported 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 all non-empty lines.





n


no line numbering





pexp


number only lines that contain the regular expression specified in exp.
See NOTES below.



Default type for logical page body is t (text lines numbered).





-ftype


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





-ddelim


The two delimiter characters specifying the start of a logical page section may
be changed from the default characters (\e\|:\|) 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.





-htype


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





-iincr


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





-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.





-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).





-p


Do not restart numbering at logical page delimiters.





-ssep


sep is the character(s) used in separating the line number and the
corresponding text line. Default sep is a TAB.





-vstartnum


startnum is the initial value used to number logical page lines. Default
startnum is 1.





-wwidth


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




 OPERANDS

The following operand is supported:


file


A path name of a text file to be line-numbered.




 EXAMPLES

Example 1 An example of the nl command


The command:


example% nl -v10 -i10 -d!+ filename1





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 !+.


 ENVIRONMENT VARIABLES

See environ(5) for descriptions of the following environment variables
that affect the execution of nl: LANG, LC_ALL,
LC_COLLATE, LC_CTYPE, LC_MESSAGES, and NLSPATH.

 EXIT STATUS

The following exit values are returned:


0


Successful completion.





>0


An error occurred.




 FILES

/usr/lib/locale/locale/LC_COLLATE/CollTable


Collation table generated by localedef





/usr/lib/locale/locale/LC_COLLATE/coll.so


Shared object containing string transformation library routines




 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

 "/usr/xpg4/bin/nl"







ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityStandard



 SEE ALSO

pr(1), attributes(5), environ(5), regex(5),
regexp(5), standards(5)

 NOTES

Internationalized Regular Expressions are used in the POSIX and "C" locales. In
other locales, Internationalized Regular Expressions are used if the following
two conditions are met:




/usr/lib/locale/locale/LC_COLLATE/CollTable is present.






/usr/lib/locale/locale/LC_COLLATE/coll.so is not present.




Otherwise, Simple Regular Expressions are used.


Internationalized Regular Expressions are explained on regex(5). Simple
Regular Expressions are explained on regexp(5).