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OpenSolaris 2009.06 - man page for pg (opensolaris section 1)

pg(1)					  User Commands 				    pg(1)

NAME
       pg - files perusal filter for CRTs

SYNOPSIS
       pg [-number] [-p string] [-cefnrs] [+ linenumber]
	    [+/ pattern /] [filename]...

DESCRIPTION
       The  pg	command  is  a filter that allows the examination of filenames one screenful at a
       time on a CRT. If the user types a RETURN, another page is displayed; other  possibilities
       are listed below.

       This  command  is  different from previous paginators in that it allows you to back up and
       review something that has already passed. The method for doing this is explained below.

       To determine terminal attributes, pg scans the terminfo(4) data base for the terminal type
       specified by the environment variable TERM. If TERM is not defined, the terminal type dumb
       is assumed.

OPTIONS
       -number	      An integer specifying the size (in lines) of the window that pg is  to  use
		      instead  of  the	default.  (On a terminal containing 24 lines, the default
		      window size is 23).

       -pstring       pg uses string as the prompt. If the prompt string contains a %d, the first
		      occurrence  of %d in the prompt will be replaced by the current page number
		      when the prompt is issued. The default prompt string is ``:''.

       -c	      Home the cursor and clear the screen  before  displaying	each  page.  This
		      option  is ignored if clear_screen is not defined for this terminal type in
		      the terminfo(4) data base.

       -e	      pg does not pause at the end of each file.

       -f	      Normally, pg splits lines longer than the screen width, but some	sequences
		      of  characters  in the text being displayed (for instance, escape sequences
		      for underlining) generate undesirable results. The -f  option  inhibits  pg
		      from splitting lines.

       -n	      Normally, commands must be terminated by a <newline> character. This option
		      causes an automatic end of command as soon as a command letter is entered.

       -r	      Restricted mode. The shell escape is disallowed. pg prints an error message
		      but does not exit.

       -s	      pg  prints  all  messages  and prompts in the standard output mode (usually
		      inverse video).

       +linenumber    Start up at linenumber.

       +/pattern/     Start up at the first line containing the regular expression pattern.

OPERANDS
       The following operands are supported:

       filename    A path name of a text file to be displayed. If no filename is given, or if  it
		   is -, the standard input is read.

USAGE
   Commands
       The responses that may be typed when pg pauses can be divided into three categories: those
       causing further perusal, those that search, and those that modify the perusal environment.

       Commands that cause further perusal normally  take  a  preceding  address,  an  optionally
       signed  number  indicating  the	point  from  which further text should be displayed. This
       address is interpreted in either pages or lines depending on the command. A signed address
       specifies  a point relative to the current page or line, and an unsigned address specifies
       an address relative to the beginning of the file. Each command has a default address  that
       is used if none is provided.

       The perusal commands and their defaults are as follows:

       (+1)<newline> or <blank>    This causes one page to be displayed. The address is specified
				   in pages.

       (+1) l			   With a relative address this causes pg to  simulate	scrolling
				   the	screen,  forward  or backward, the number of lines speci-
				   fied. With an absolute address this command prints a screenful
				   beginning at the specified line.

       (+1) d or ^D		   Simulates scrolling half a screen forward or backward.

       if			   Skip i screens of text.

       iz			   Same  as  <newline> except that i, if present, becomes the new
				   default number of lines per screenful.

       The following perusal commands take no address.

       . or ^L	    Typing a single period causes the current page of text to be redisplayed.

       $	    Displays the last full window in the file. Use with caution when the input is
		    a pipe.

       The following commands are available for searching for text patterns in the text. The reg-
       ular expressions are described on the regex(5) manual page. They must always be terminated
       by a <newline>, even if the -n option is specified.

       i/pattern/    Search  forward  for  the ith (default i=1) occurrence of pattern. Searching
		     begins immediately after the current page and continues to the  end  of  the
		     current file, without wrap-around.

       i^pattern^

       i?pattern?    Search  backwards for the ith (default i=1) occurrence of pattern. Searching
		     begins immediately before the current page and continues to the beginning of
		     the current file, without wrap-around. The ^ notation is useful for Adds 100
		     terminals which will not properly handle the ?.

       After searching, pg will normally display the line found at the top of  the  screen.  This
       can  be	modified by appending m or b to the search command to leave the line found in the
       middle or at the bottom of the window from now on. The suffix t can be used to restore the
       original situation.

       The user of pg can modify the environment of perusal with the following commands:

       in	     Begin  perusing  the ith next file in the command line. The i is an unsigned
		     number, default value is 1.

       ip	     Begin perusing the ith previous file in the command line. i is  an  unsigned
		     number, default is 1.

       iw	     Display another window of text. If i is present, set the window size to i.

       s filename    Save  the	input  in  the named file. Only the current file being perused is
		     saved. The white space between the s and filename is optional. This  command
		     must  always  be  terminated by a <newline>, even if the -n option is speci-
		     fied.

       h	     Help by displaying an abbreviated summary of available commands.

       q or Q	     Quit pg.

       !command      Command is passed to the shell, whose name is taken from the SHELL  environ-
		     ment  variable.  If  this	is not available, the default shell is used. This
		     command must always be terminated by a <newline>, even if the -n  option  is
		     specified.

       At any time when output is being sent to the terminal, the user can hit the quit key (nor-
       mally CTRL-\) or the interrupt (break) key. This causes pg to  stop  sending  output,  and
       display	the  prompt. The user may then enter one of the above commands in the normal man-
       ner. Unfortunately, some output is lost when this is done, because any characters  waiting
       in the terminal's output queue are flushed when the quit signal occurs.

       If  the	standard  output  is not a terminal, then pg acts just like cat(1), except that a
       header is printed before each file (if there is more than one).

   Large File Behavior
       See largefile(5) for the description of the behavior of pg when encountering files greater
       than or equal to 2 Gbyte ( 2^31 bytes).

EXAMPLES
       Example 1 An example of the pg command.

       The following command line uses pg to read the system news:

       example% news | pg -p "(Page %d):"

ENVIRONMENT VARIABLES
       See  environ(5)	for  descriptions  of the following environment variables that affect the
       execution of pg: LC_CTYPE, LC_MESSAGES, and NLSPATH.

       The following environment variables affect the execution of pg:

       COLUMNS	  Determine the horizontal screen size. If unset or NULL, use the value of  TERM,
		  the  window size, baud rate, or some combination of these, to indicate the ter-
		  minal type for the screen size calculation.

       LINES	  Determine the number of lines to be displayed on the screen. If unset or  NULL,
		  use  the  value  of  TERM,  the  window size, baud rate, or some combination of
		  these, to indicate the terminal type for the screen size calculation.

       SHELL	  Determine the name of the command interpreter executed for a !command.

       TERM	  Determine terminal attributes. Optionally attempt to search a  system-dependent
		  database,  keyed  on the value of the TERM environment variable. If no informa-
		  tion is available, a	terminal  incapable  of  cursor-addressable  movement  is
		  assumed.

EXIT STATUS
       The following exit values are returned:

       0     Successful completion.

       >0    An error occurred.

FILES
       /tmp/pg*

	   temporary file when input is from a pipe

       /usr/share/lib/terminfo/?/*

	   terminal information database

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

       +-----------------------------------------------------------+
       |      ATTRIBUTE TYPE		    ATTRIBUTE VALUE	   |
       |Availability		      SUNWcsu			   |
       |CSI			      Enabled			   |
       +-----------------------------------------------------------+

SEE ALSO
       cat(1), grep(1), more(1), terminfo(4), attributes(5), environ(5), largefile(5), regex(5)

NOTES
       While  waiting for terminal input, pg responds to BREAK, CTRL-C, and CTRL-\ by terminating
       execution. Between prompts, however, these signals interrupt pg's current task  and  place
       the user in prompt mode. These should be used with caution when input is being read from a
       pipe, since an interrupt is likely to terminate the other commands in the pipeline.

       The terminal /, ^, or ? may be omitted from the searching commands.

       If terminal tabs are not set every eight positions, undesirable results may occur.

       When using pg as a filter with another command that changes the terminal I/O options, ter-
       minal settings may not be restored correctly.

SunOS 5.11				   25 Feb 1996					    pg(1)


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