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35 .\" @(#)col.1 6.8 (Berkeley) 6/17/91
42 .Nd filter reverse line feeds from input
49 filters out reverse (and half reverse) line feeds so the output is
50 in the correct order with only forward and half forward line
51 feeds, and replaces white-space characters with tabs where possible.
52 This can be useful in processing the output of
58 reads from standard input and writes to standard output.
60 The options are as follows:
61 .Bl -tag -width "-lnum"
62 .It Fl b, Fl Fl no-backspaces
63 Do not output any backspaces, printing only the last character
64 written to each column position.
66 Forward half line feeds are permitted (``fine'' mode).
67 Normally characters printed on a half line boundary are printed
68 on the following line.
70 Force unknown control sequences to be passed through unchanged.
73 will filter out any control sequences from the input other than those
74 recognized and interpreted by itself, which are listed below.
76 Output tabs instead of multiple spaces.
77 .It Fl x, Fl Fl spaces
78 Output multiple spaces instead of tabs.
79 .It Fl l, Fl Fl lines Ar num
83 By default, 128 lines are buffered.
84 .It Fl V, Fl Fl version
85 Output version information and exit.
90 The control sequences for carriage motion that
92 understands and their decimal values are listed in the following
95 .Bl -tag -width "carriage return" -compact
97 reverse line feed (escape then 7)
99 half reverse line feed (escape then 8)
101 half forward line feed (escape then 9)
103 moves back one column (8); ignored in the first column
107 forward line feed (10); also does carriage return
109 shift to normal character set (15)
111 shift to alternate character set (14)
113 moves forward one column (32)
115 moves forward to next tab stop (9)
117 reverse line feed (11)
120 All unrecognized control characters and escape sequences are
124 keeps track of the character set as characters are read and makes
125 sure the character set is correct when they are output.
127 If the input attempts to back up to the last flushed line,
129 will display a warning message.
137 utility conforms to the Single UNIX Specification, Version 2. The
139 option is an extension to the standard.
144 appeared in Version 6 AT&T UNIX.
146 The col command is part of the util-linux package and is available from
147 ftp://ftp.kernel.org/pub/linux/utils/util-linux/.