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7b089094 WJ |
1 | .\" Copyright (c) 1980, 1990 The Regents of the University of California. |
2 | .\" All rights reserved. | |
3 | .\" | |
4 | .\" Redistribution and use in source and binary forms, with or without | |
5 | .\" modification, are permitted provided that the following conditions | |
6 | .\" are met: | |
7 | .\" 1. Redistributions of source code must retain the above copyright | |
8 | .\" notice, this list of conditions and the following disclaimer. | |
9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer in the | |
11 | .\" documentation and/or other materials provided with the distribution. | |
12 | .\" 3. All advertising materials mentioning features or use of this software | |
13 | .\" must display the following acknowledgement: | |
14 | .\" This product includes software developed by the University of | |
15 | .\" California, Berkeley and its contributors. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
17 | .\" may be used to endorse or promote products derived from this software | |
18 | .\" without specific prior written permission. | |
19 | .\" | |
20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | .\" SUCH DAMAGE. | |
31 | .\" | |
32 | .\" @(#)expand.1 6.7 (Berkeley) 7/26/91 | |
33 | .\" | |
34 | .Dd July 26, 1991 | |
35 | .Dt EXPAND 1 | |
36 | .Os BSD 4 | |
37 | .Sh NAME | |
38 | .Nm expand , | |
39 | .Nm unexpand | |
40 | .Nd expand tabs to spaces, and vice versa | |
41 | .Sh SYNOPSIS | |
42 | .Nm expand | |
43 | .Op Fl Ns Ar tabstop | |
44 | .Op Fl Ns Ar tab1,tab2,...,tabn | |
45 | .Ar | |
46 | .Nm unexpand | |
47 | .Op Fl a | |
48 | .Ar | |
49 | .Sh DESCRIPTION | |
50 | .Nm Expand | |
51 | processes the named files or the standard input writing | |
52 | the standard output with tabs changed into blanks. | |
53 | Backspace characters are preserved into the output and decrement | |
54 | the column count for tab calculations. | |
55 | .Nm Expand | |
56 | is useful for pre-processing character files | |
57 | (before sorting, looking at specific columns, etc.) that | |
58 | contain tabs. | |
59 | .Pp | |
60 | If a single | |
61 | .Ar tabstop | |
62 | argument is given, then tabs are set | |
63 | .Ar tabstop | |
64 | spaces apart instead of the default 8. | |
65 | If multiple tabstops are given then the tabs are set at those | |
66 | specific columns. | |
67 | .Pp | |
68 | .Nm Unexpand | |
69 | puts tabs back into the data from the standard input or the named | |
70 | files and writes the result on the standard output. | |
71 | .Pp | |
72 | Option (with | |
73 | .Nm unexpand | |
74 | only): | |
75 | .Bl -tag -width flag | |
76 | .It Fl a | |
77 | By default, only leading blanks and tabs | |
78 | are reconverted to maximal strings of tabs. If the | |
79 | .Fl a | |
80 | option is given, then tabs are inserted whenever they would compress the | |
81 | resultant file by replacing two or more characters. | |
82 | .El | |
83 | .Sh HISTORY | |
84 | The | |
85 | .Nm expand | |
86 | command appeared in | |
87 | .Bx 3.0 . |