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1 | .\" Copyright (c) 1990 The Regents of the University of California. |
2 | .\" All rights reserved. | |
3 | .\" | |
4 | .\" This code is derived from software contributed to Berkeley by | |
5 | .\" Michael Rendell. | |
6 | .\" | |
7 | .\" Redistribution and use in source and binary forms, with or without | |
8 | .\" modification, are permitted provided that the following conditions | |
9 | .\" are met: | |
10 | .\" 1. Redistributions of source code must retain the above copyright | |
11 | .\" notice, this list of conditions and the following disclaimer. | |
12 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
13 | .\" notice, this list of conditions and the following disclaimer in the | |
14 | .\" documentation and/or other materials provided with the distribution. | |
15 | .\" 3. All advertising materials mentioning features or use of this software | |
16 | .\" must display the following acknowledgement: | |
17 | .\" This product includes software developed by the University of | |
18 | .\" California, Berkeley and its contributors. | |
19 | .\" 4. Neither the name of the University nor the names of its contributors | |
20 | .\" may be used to endorse or promote products derived from this software | |
21 | .\" without specific prior written permission. | |
22 | .\" | |
23 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
24 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
25 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
26 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
28 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
29 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
30 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
31 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
32 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
33 | .\" SUCH DAMAGE. | |
34 | .\" | |
35 | .\" @(#)col.1 6.8 (Berkeley) 6/17/91 | |
36 | .\" | |
37 | .Dd June 17, 1991 | |
38 | .Dt COL 1 | |
39 | .Os | |
40 | .Sh NAME | |
41 | .Nm col | |
42 | .Nd filter reverse line feeds from input | |
43 | .Sh SYNOPSIS | |
44 | .Nm col | |
45 | .Op Fl bfx | |
46 | .Op Fl l Ar num | |
47 | .Sh DESCRIPTION | |
48 | .Nm Col | |
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 | |
53 | .Xr nroff 1 | |
54 | and | |
55 | .Xr tbl 1 . | |
56 | .Pp | |
57 | .Nm Col | |
58 | reads from standard input and writes to standard output. | |
59 | .Pp | |
60 | The options are as follows: | |
61 | .Bl -tag -width "-lnum" | |
62 | .It Fl b | |
63 | Do not output any backspaces, printing only the last character | |
64 | written to each column position. | |
65 | .It Fl f | |
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. | |
69 | .It Fl x | |
70 | Output multiple spaces instead of tabs. | |
71 | .It Fl l Ns Ar num | |
72 | Buffer at least | |
73 | .Ar num | |
74 | lines in memory. | |
75 | By default, 128 lines are buffered. | |
76 | .El | |
77 | .Pp | |
78 | The control sequences for carriage motion that | |
79 | .Nm col | |
80 | understands and their decimal values are listed in the following | |
81 | table: | |
82 | .Pp | |
83 | .Bl -tag -width "carriage return" -compact | |
84 | .It ESC\-7 | |
85 | reverse line feed (escape then 7) | |
86 | .It ESC\-8 | |
87 | half reverse line feed (escape then 8) | |
88 | .It ESC\-9 | |
89 | half forward line feed (escape then 9) | |
90 | .It backspace | |
91 | moves back one column (8); ignored in the first column | |
92 | .It carriage return | |
93 | (13) | |
94 | .It newline | |
95 | forward line feed (10); also does carriage return | |
96 | .It shift in | |
97 | shift to normal character set (15) | |
98 | .It shift out | |
99 | shift to alternate character set (14) | |
100 | .It space | |
101 | moves forward one column (32) | |
102 | .It tab | |
103 | moves forward to next tab stop (9) | |
104 | .It vertical tab | |
105 | reverse line feed (11) | |
106 | .El | |
107 | .Pp | |
108 | All unrecognized control characters and escape sequences are | |
109 | discarded. | |
110 | .Pp | |
111 | .Nm Col | |
112 | keeps track of the character set as characters are read and makes | |
113 | sure the character set is correct when they are output. | |
114 | .Pp | |
115 | If the input attempts to back up to the last flushed line, | |
116 | .Nm col | |
117 | will display a warning message. | |
118 | .Sh SEE ALSO | |
119 | .Xr expand 1 , | |
120 | .Xr nroff 1 , | |
121 | .Xr tbl 1 | |
122 | .Sh HISTORY | |
123 | A | |
124 | .Nm col | |
125 | command | |
126 | appeared in Version 6 AT&T UNIX. |