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Annotation of src/usr.bin/col/col.1, Revision 1.1

1.1     ! deraadt     1: .\"    $NetBSD: col.1,v 1.4 1995/03/26 05:25:52 glass Exp $
        !             2: .\"
        !             3: .\" Copyright (c) 1990, 1993
        !             4: .\"    The Regents of the University of California.  All rights reserved.
        !             5: .\"
        !             6: .\" This code is derived from software contributed to Berkeley by
        !             7: .\" Michael Rendell.
        !             8: .\"
        !             9: .\" Redistribution and use in source and binary forms, with or without
        !            10: .\" modification, are permitted provided that the following conditions
        !            11: .\" are met:
        !            12: .\" 1. Redistributions of source code must retain the above copyright
        !            13: .\"    notice, this list of conditions and the following disclaimer.
        !            14: .\" 2. Redistributions in binary form must reproduce the above copyright
        !            15: .\"    notice, this list of conditions and the following disclaimer in the
        !            16: .\"    documentation and/or other materials provided with the distribution.
        !            17: .\" 3. All advertising materials mentioning features or use of this software
        !            18: .\"    must display the following acknowledgement:
        !            19: .\"    This product includes software developed by the University of
        !            20: .\"    California, Berkeley and its contributors.
        !            21: .\" 4. Neither the name of the University nor the names of its contributors
        !            22: .\"    may be used to endorse or promote products derived from this software
        !            23: .\"    without specific prior written permission.
        !            24: .\"
        !            25: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            26: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            27: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            28: .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            29: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            30: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            31: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            32: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            33: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            34: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            35: .\" SUCH DAMAGE.
        !            36: .\"
        !            37: .\"     @(#)col.1      8.1 (Berkeley) 6/29/93
        !            38: .\"
        !            39: .Dd June 29, 1993
        !            40: .Dt COL 1
        !            41: .Os
        !            42: .Sh NAME
        !            43: .Nm col
        !            44: .Nd filter reverse line feeds from input
        !            45: .Sh SYNOPSIS
        !            46: .Nm col
        !            47: .Op Fl bfx
        !            48: .Op Fl l Ar num
        !            49: .Sh DESCRIPTION
        !            50: .Nm Col
        !            51: filters out reverse (and half reverse) line feeds so that the output is
        !            52: in the correct order with only forward and half forward line
        !            53: feeds, and replaces white-space characters with tabs where possible.
        !            54: This can be useful in processing the output of
        !            55: .Xr nroff 1
        !            56: and
        !            57: .Xr tbl  1 .
        !            58: .Pp
        !            59: .Nm Col
        !            60: reads from the standard input and writes to the standard output.
        !            61: .Pp
        !            62: The options are as follows:
        !            63: .Bl -tag -width "-l num  "
        !            64: .It Fl b
        !            65: Do not output any backspaces, printing only the last character
        !            66: written to each column position.
        !            67: .It Fl f
        !            68: Forward half line feeds are permitted (``fine'' mode).
        !            69: Normally characters printed on a half line boundary are printed
        !            70: on the following line.
        !            71: .It Fl x
        !            72: Output multiple spaces instead of tabs.
        !            73: .It Fl l Ar num
        !            74: Buffer at least
        !            75: .Ar num
        !            76: lines in memory.
        !            77: By default, 128 lines are buffered.
        !            78: .El
        !            79: .Pp
        !            80: The control sequences for carriage motion that
        !            81: .Nm col
        !            82: understands and their decimal values are listed in the following
        !            83: table:
        !            84: .Pp
        !            85: .Bl -tag -width "carriage return" -compact
        !            86: .It ESC\-7
        !            87: reverse line feed (escape then 7)
        !            88: .It ESC\-8
        !            89: half reverse line feed (escape then 8)
        !            90: .It ESC\-9
        !            91: half forward line feed (escape then 9)
        !            92: .It backspace
        !            93: moves back one column (8); ignored in the first column
        !            94: .It carriage return
        !            95: (13)
        !            96: .It newline
        !            97: forward line feed (10); also does carriage return
        !            98: .It shift in
        !            99: shift to normal character set (15)
        !           100: .It shift out
        !           101: shift to alternate character set (14)
        !           102: .It space
        !           103: moves forward one column (32)
        !           104: .It tab
        !           105: moves forward to next tab stop (9)
        !           106: .It vertical tab
        !           107: reverse line feed (11)
        !           108: .El
        !           109: .Pp
        !           110: All unrecognized control characters and escape sequences are
        !           111: discarded.
        !           112: .Pp
        !           113: .Nm Col
        !           114: keeps track of the character set as characters are read and makes
        !           115: sure the character set is correct when they are output.
        !           116: .Pp
        !           117: If the input attempts to back up to the last flushed line,
        !           118: .Nm col
        !           119: will display a warning message.
        !           120: .Sh SEE ALSO
        !           121: .Xr expand 1 ,
        !           122: .Xr nroff 1 ,
        !           123: .Xr tbl 1
        !           124: .Sh HISTORY
        !           125: A
        !           126: .Nm col
        !           127: command appeared in
        !           128: .At v6 .