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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"
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 multiple spaces instead of tabs.
81 By default, 128 lines are buffered.
84 The control sequences for carriage motion that
86 understands and their decimal values are listed in the following
89 .Bl -tag -width "carriage return" -compact
91 reverse line feed (escape then 7)
93 half reverse line feed (escape then 8)
95 half forward line feed (escape then 9)
97 moves back one column (8); ignored in the first column
101 forward line feed (10); also does carriage return
103 shift to normal character set (15)
105 shift to alternate character set (14)
107 moves forward one column (32)
109 moves forward to next tab stop (9)
111 reverse line feed (11)
114 All unrecognized control characters and escape sequences are
118 keeps track of the character set as characters are read and makes
119 sure the character set is correct when they are output.
121 If the input attempts to back up to the last flushed line,
123 will display a warning message.
131 utility conforms to the Single UNIX Specification, Version 2. The
133 option is an extension to the standard.
138 appeared in Version 6 AT&T UNIX.
140 The col command is part of the util-linux-ng package and is available from
141 ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.