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authorIndrajith K L2022-12-03 17:00:20 +0530
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tree2764fc62da58f2ba8da7ed341643fc359873142f /coreutils-5.3.0-bin/man/cat1p/pr.1p.txt
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+pr(P) pr(P)
+
+
+
+
+
+NAME
+ pr - print files
+
+SYNOPSIS
+ pr [+page][-column][-adFmrt][-e[char][ gap]][-h
+ header][-i[char][gap]]
+
+ [-l lines][-n[char][width]][-o off-
+ set][-s[char]][-w width][-fp]
+ [file...]
+
+DESCRIPTION
+ The pr utility is a printing and pagination filter. If
+ multiple input files are specified, each shall be read,
+ formatted, and written to standard output. By default,
+ the input shall be separated into 66-line pages, each
+ with:
+
+ A 5-line header that includes the page number,
+ date, time, and the pathname of the file
+
+ A 5-line trailer consisting of blank lines
+
+ If standard output is associated with a terminal, diag-
+ nostic messages shall be deferred until the pr utility
+ has completed processing.
+
+ When options specifying multi-column output are speci-
+ fied, output text columns shall be of equal width; input
+ lines that do not fit into a text column shall be trun-
+ cated. By default, text columns shall be separated with
+ at least one <blank>.
+
+OPTIONS
+ The pr utility shall conform to the Base Definitions
+ volume of IEEE Std 1003.1-2001, Section 12.2, Utility
+ Syntax Guidelines, except that: the page option has a
+ '+' delimiter; page and column can be multi-digit num-
+ bers; some of the option-arguments are optional; and
+ some of the option-arguments cannot be specified as sep-
+ arate arguments from the preceding option letter. In
+ particular, the -s option does not allow the option let-
+ ter to be separated from its argument, and the options
+ -e, -i, and -n require that both arguments, if present,
+ not be separated from the option letter.
+
+ The following options shall be supported. In the follow-
+ ing option descriptions, column, lines, offset, page,
+ and width are positive decimal integers; gap is a non-
+ negative decimal integer.
+
+ +page Begin output at page number page of the formatted
+ input.
+
+ -column
+ Produce multi-column output that is arranged in
+ column columns (the default shall be 1) and is
+ written down each column in the order in which
+ the text is received from the input file. This
+ option should not be used with -m. The options -e
+ and -i shall be assumed for multiple text-column
+ output. Whether or not text columns are produced
+ with identical vertical lengths is unspecified,
+ but a text column shall never exceed the length
+ of the page (see the -l option). When used with
+ -t, use the minimum number of lines to write the
+ output.
+
+ -a Modify the effect of the - column option so that
+ the columns are filled across the page in a
+ round-robin order (for example, when column is 2,
+ the first input line heads column 1, the second
+ heads column 2, the third is the second line in
+ column 1, and so on).
+
+ -d Produce output that is double-spaced; append an
+ extra <newline> following every <newline> found
+ in the input.
+
+ -e[char][gap]
+
+ Expand each input <tab> to the next greater col-
+ umn position specified by the formula n* gap+1,
+ where n is an integer > 0. If gap is zero or is
+ omitted, it shall default to 8. All <tab>s in the
+ input shall be expanded into the appropriate num-
+ ber of <space>s. If any non-digit character,
+ char, is specified, it shall be used as the input
+ <tab>.
+
+ -f Use a <form-feed> for new pages, instead of the
+ default behavior that uses a sequence of <new-
+ line>s. Pause before beginning the first page if
+ the standard output is associated with a termi-
+ nal.
+
+ -F Use a <form-feed> for new pages, instead of the
+ default behavior that uses a sequence of <new-
+ line>s.
+
+ -h header
+ Use the string header to replace the contents of
+ the file operand in the page header.
+
+ -i[char][gap]
+ In output, replace multiple <space>s with <tab>s
+ wherever two or more adjacent <space>s reach col-
+ umn positions gap+1, 2* gap+1, 3* gap+1, and so
+ on. If gap is zero or is omitted, default tab
+ settings at every eighth column position shall be
+ assumed. If any non-digit character, char, is
+ specified, it shall be used as the output <tab>.
+
+ -l lines
+ Override the 66-line default and reset the page
+ length to lines. If lines is not greater than
+ the sum of both the header and trailer depths (in
+ lines), the pr utility shall suppress both the
+ header and trailer, as if the -t option were in
+ effect.
+
+ -m Merge files. Standard output shall be formatted
+ so the pr utility writes one line from each file
+ specified by a file operand, side by side into
+ text columns of equal fixed widths, in terms of
+ the number of column positions. Implementations
+ shall support merging of at least nine file oper-
+ ands.
+
+ -n[char][width]
+
+ Provide width-digit line numbering (default for
+ width shall be 5). The number shall occupy the
+ first width column positions of each text column
+ of default output or each line of -m output. If
+ char (any non-digit character) is given, it shall
+ be appended to the line number to separate it
+ from whatever follows (default for char is a
+ <tab>).
+
+ -o offset
+ Each line of output shall be preceded by offset
+ <space>s. If the -o option is not specified, the
+ default offset shall be zero. The space taken is
+ in addition to the output line width (see the -w
+ option below).
+
+ -p Pause before beginning each page if the standard
+ output is directed to a terminal ( pr shall write
+ an <alert> to standard error and wait for a <car-
+ riage-return> to be read on /dev/tty).
+
+ -r Write no diagnostic reports on failure to open
+ files.
+
+ -s[char]
+ Separate text columns by the single character
+ char instead of by the appropriate number of
+ <space>s (default for char shall be <tab>).
+
+ -t Write neither the five-line identifying header
+ nor the five-line trailer usually supplied for
+ each page. Quit writing after the last line of
+ each file without spacing to the end of the page.
+
+ -w width
+ Set the width of the line to width column posi-
+ tions for multiple text-column output only. If
+ the -w option is not specified and the -s option
+ is not specified, the default width shall be 72.
+ If the -w option is not specified and the -s
+ option is specified, the default width shall be
+ 512.
+
+ For single column output, input lines shall not be trun-
+ cated.
+
+
+OPERANDS
+ The following operand shall be supported:
+
+ file A pathname of a file to be written. If no file
+ operands are specified, or if a file operand is
+ '-' , the standard input shall be used.
+
+
+STDIN
+ The standard input shall be used only if no file oper-
+ ands are specified, or if a file operand is '-' . See
+ the INPUT FILES section.
+
+INPUT FILES
+ The input files shall be text files.
+
+ The file /dev/tty shall be used to read responses
+ required by the -p option.
+
+ENVIRONMENT VARIABLES
+ The following environment variables shall affect the
+ execution of pr:
+
+ LANG Provide a default value for the internationaliza-
+ tion variables that are unset or null. (See the
+ Base Definitions volume of IEEE Std 1003.1-2001,
+ Section 8.2, Internationalization Variables for
+ the precedence of internationalization variables
+ used to determine the values of locale cate-
+ gories.)
+
+ LC_ALL If set to a non-empty string value, override the
+ values of all the other internationalization
+ variables.
+
+ LC_CTYPE
+ Determine the locale for the interpretation of
+ sequences of bytes of text data as characters
+ (for example, single-byte as opposed to multi-
+ byte characters in arguments and input files) and
+ which characters are defined as printable (char-
+ acter class print). Non-printable characters are
+ still written to standard output, but are not
+ counted for the purpose for column-width and
+ line-length calculations.
+
+ LC_MESSAGES
+ Determine the locale that should be used to
+ affect the format and contents of diagnostic mes-
+ sages written to standard error.
+
+ LC_TIME
+ Determine the format of the date and time for use
+ in writing header lines.
+
+ NLSPATH
+ Determine the location of message catalogs for
+ the processing of LC_MESSAGES .
+
+ TZ Determine the timezone used to calculate date and
+ time strings written in header lines. If TZ is
+ unset or null, an unspecified default timezone
+ shall be used.
+
+
+ASYNCHRONOUS EVENTS
+ If pr receives an interrupt while writing to a terminal,
+ it shall flush all accumulated error messages to the
+ screen before terminating.
+
+STDOUT
+ The pr utility output shall be a paginated version of
+ the original file (or files). This pagination shall be
+ accomplished using either <form-feed>s or a sequence of
+ <newline>s, as controlled by the -F or -f option.
+ Page headers shall be generated unless the -t option is
+ specified. The page headers shall be of the form:
+
+
+ "\n\n%s %s Page %d\n\n\n", <output of date>, <file>, <page number>
+
+ In the POSIX locale, the <output of date> field, repre-
+ senting the date and time of last modification of the
+ input file (or the current date and time if the input
+ file is standard input), shall be equivalent to the out-
+ put of the following command as it would appear if exe-
+ cuted at the given time:
+
+
+ date "+%b %e %H:%M %Y"
+
+ without the trailing <newline>, if the page being writ-
+ ten is from standard input. If the page being written is
+ not from standard input, in the POSIX locale, the same
+ format shall be used, but the time used shall be the
+ modification time of the file corresponding to file
+ instead of the current time. When the LC_TIME locale
+ category is not set to the POSIX locale, a different
+ format and order of presentation of this field may be
+ used.
+
+ If the standard input is used instead of a file operand,
+ the <file> field shall be replaced by a null string.
+
+ If the -h option is specified, the <file> field shall be
+ replaced by the header argument.
+
+STDERR
+ The standard error shall be used for diagnostic messages
+ and for alerting the terminal when -p is specified.
+
+OUTPUT FILES
+ None.
+
+EXTENDED DESCRIPTION
+ None.
+
+EXIT STATUS
+ The following exit values shall be returned:
+
+ 0 Successful completion.
+
+ >0 An error occurred.
+
+
+CONSEQUENCES OF ERRORS
+ Default.
+
+ The following sections are informative.
+
+APPLICATION USAGE
+ None.
+
+EXAMPLES
+ Print a numbered list of all files in the current direc-
+ tory:
+
+
+ ls -a | pr -n -h "Files in $(pwd)."
+
+ Print file1 and file2 as a double-spaced, three-column
+ listing headed by "file list'':
+
+
+ pr -3d -h "file list" file1 file2
+
+ Write file1 on file2, expanding tabs to columns 10, 19,
+ 28, ...:
+
+
+ pr -e9 -t <file1 >file2
+
+RATIONALE
+ This utility is one of those that does not follow the
+ Utility Syntax Guidelines because of its historical ori-
+ gins. The standard developers could have added new
+ options that obeyed the guidelines (and marked the old
+ options obsolescent) or devised an entirely new utility;
+ there are examples of both actions in this volume of
+ IEEE Std 1003.1-2001. Because of its widespread use by
+ historical applications, the standard developers decided
+ to exempt this version of pr from many of the guide-
+ lines.
+
+ Implementations are required to accept option-arguments
+ to the -h, -l, -o, and -w options whether presented as
+ part of the same argument or as a separate argument to
+ pr, as suggested by the Utility Syntax Guidelines. The
+ -n and -s options, however, are specified as in histori-
+ cal practice because they are frequently specified with-
+ out their optional arguments. If a <blank> were allowed
+ before the option-argument in these cases, a file oper-
+ and could mistakenly be interpreted as an option-argu-
+ ment in historical applications.
+
+ The text about the minimum number of lines in multi-col-
+ umn output was included to ensure that a best effort is
+ made in balancing the length of the columns. There are
+ known historical implementations in which, for example,
+ 60-line files are listed by pr -2 as one column of 56
+ lines and a second of 4. Although this is not a problem
+ when a full page with headers and trailers is produced,
+ it would be relatively useless when used with -t.
+
+ Historical implementations of the pr utility have dif-
+ fered in the action taken for the -f option. BSD uses it
+ as described here for the -F option; System V uses it to
+ change trailing <newline>s on each page to a <form-feed>
+ and, if standard output is a TTY device, sends an
+ <alert> to standard error and reads a line from /dev/tty
+ before the first page. There were strong arguments from
+ both sides of this issue concerning historical practice
+ and as a result the -F option was added. XSI-conformant
+ systems support the System V historical actions for the
+ -f option.
+
+ The <output of date> field in the -l format is specified
+ only for the POSIX locale. As noted, the format can be
+ different in other locales. No mechanism for defining
+ this is present in this volume of IEEE Std 1003.1-2001,
+ as the appropriate vehicle is a message catalog; that
+ is, the format should be specified as a "message".
+
+FUTURE DIRECTIONS
+ None.
+
+SEE ALSO
+ expand , lp
+
+COPYRIGHT
+ Portions of this text are reprinted and reproduced in
+ electronic form from IEEE Std 1003.1, 2003 Edition,
+ Standard for Information Technology -- Portable Operat-
+ ing System Interface (POSIX), The Open Group Base Speci-
+ fications Issue 6, Copyright (C) 2001-2003 by the Insti-
+ tute of Electrical and Electronics Engineers, Inc and
+ The Open Group. In the event of any discrepancy between
+ this version and the original IEEE and The Open Group
+ Standard, the original IEEE and The Open Group Standard
+ is the referee document. The original Standard can be
+ obtained online at http://www.open-
+ group.org/unix/online.html .
+
+
+
+POSIX 2003 pr(P)