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Annotation of 43BSDTahoe/man/man1/col.1, revision 1.1

1.1     ! root        1: .\"    @(#)col.1       6.2 (Berkeley) 5/16/86
        !             2: .\"
        !             3: .TH COL 1 "May 16, 1986"
        !             4: .AT 3
        !             5: .SH NAME
        !             6: col \- filter reverse line feeds
        !             7: .SH SYNOPSIS
        !             8: .B col
        !             9: [
        !            10: .B \-bfh
        !            11: ]
        !            12: .SH DESCRIPTION
        !            13: .I Col
        !            14: reads the standard input and writes the standard output.
        !            15: It performs the line overlays implied by reverse line
        !            16: feeds (ESC-7 in ASCII)
        !            17: and by forward and reverse half line feeds (ESC-9 and ESC-8).
        !            18: .I Col
        !            19: is particularly useful for filtering multicolumn
        !            20: output made with the `.rt' command of
        !            21: .I nroff
        !            22: and output resulting from use of the
        !            23: .IR tbl (1)
        !            24: preprocessor.
        !            25: .PP
        !            26: Although
        !            27: .I col
        !            28: accepts half line motions in its input, it normally does not
        !            29: emit them on output.
        !            30: Instead, text that would appear between lines is moved to the next lower
        !            31: full line boundary.
        !            32: This treatment can be suppressed by the
        !            33: .B \-f
        !            34: (fine) option; in this case
        !            35: the output from
        !            36: .I col
        !            37: may contain forward half line feeds (ESC-9), but will still never contain
        !            38: either kind of reverse line motion.
        !            39: .PP
        !            40: If the
        !            41: .B \-b
        !            42: option is given,
        !            43: .I col
        !            44: assumes that the output device in use is not capable of backspacing.
        !            45: In this case, if several characters are to appear in the same place,
        !            46: only the last one read will be taken.
        !            47: .PP
        !            48: The control characters SO (ASCII code 017),
        !            49: and SI (016) are assumed
        !            50: to start and end text in an alternate character set.
        !            51: The character set (primary or alternate) associated with each printing
        !            52: character read is remembered; on output, SO and SI characters are generated
        !            53: where necessary to maintain the correct treatment of each character.
        !            54: .PP
        !            55: If the
        !            56: .B \-h
        !            57: option is given,
        !            58: .I col
        !            59: converts white space to tabs to shorten printing time.
        !            60: .PP
        !            61: All control characters are removed from the input except space,
        !            62: backspace,
        !            63: tab, return, newline, ESC (033) followed by one of 7, 8, 9, SI, SO, and VT
        !            64: (013).
        !            65: This last character is an alternate form of full reverse line feed, for
        !            66: compatibility with some other hardware conventions.
        !            67: All other non-printing characters are ignored.
        !            68: .SH "SEE ALSO"
        !            69: troff(1), tbl(1)
        !            70: .SH BUGS
        !            71: Can't back up more than 128 lines.
        !            72: .br
        !            73: No more than 800 characters, including backspaces, on a line.

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