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tabs(1) User Commands tabs(1)
NAME
tabs - set tabs on a terminal
SYNOPSIS
tabs [-n | --file
[[-code] | -a | -a2 | -c | -c2 | -c3 | -f | -p | -s | -u]]
q!! [+m [n]] [-T type]
tabs [-T type] [+ m [n]] n1 [, n2 ,...]
DESCRIPTION
The tabs utility sets the tab stops on the user's terminal according to a tab specifica-
tion, after clearing any previous settings. The user's terminal must have remotely set-
table hardware tabs.
OPTIONS
The following options are supported. If a given flag occurs more than once, the last value
given takes effect:
-T type tabs needs to know the type of terminal in order to set tabs and margins. type
is a name listed in term(5). If no -T flag is supplied, tabs uses the value of
the environment variable TERM. If the value of TERM is NULL or TERM is not
defined in the environment (see environ(5)), tabs uses ansi+tabs as the termi-
nal type to provide a sequence that will work for many terminals.
+m[n] The margin argument may be used for some terminals. It causes all tabs to be
moved over n columns by making column n+1 the left margin. If +m is given
without a value of n, the value assumed is 10. For a TermiNet, the first value
in the tab list should be 1, or the margin will move even further to the
right. The normal (leftmost) margin on most terminals is obtained by +m0. The
margin for most terminals is reset only when the +m flag is given explicitly.
Tab Specification
Four types of tab specification are accepted. They are described below: canned, repeti-
tive (-n), arbitrary (n1,n2,...), and file (-file).
If no tab specification is given, the default value is -8, that is, UNIX system ``stan-
dard'' tabs. The lowest column number is 1. Note: For tabs, column 1 always refers to the
leftmost column on a terminal, even one whose column markers begin at 0, for example, the
DASI 300, DASI 300s, and DASI 450.
Canned -code
Use one of the codes listed below to select a canned set of tabs. If more than one code is
specified, the last code option will be used. The legal codes and their meanings are as
follows:
-a 1,10,16,36,72 Assembler, IBM S/370, first format
-a2 1,10,16,40,72
Assembler, IBM S/370, second format
-c 1,8,12,16,20,55
COBOL, normal format
-c2 1,6,10,14,49
COBOL compact format (columns 1-6 omitted). Using this code, the first typed char-
acter corresponds to card column 7, one space gets you to column 8, and a tab
reaches column 12. Files using this tab setup should include a format specification
as follows (see fspec(4)):
<:t-c2 m6 s66 d:>
-c3 1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67
COBOL compact format (columns 1-6 omitted), with more tabs than -c2. This is the
recommended format for COBOL. The appropriate format specification is (see
fspec(4)):
<:t-c3 m6 s66 d:>
-f 1,7,11,15,19,23
FORTRAN
-p 1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61
PL/I
-s 1,10,55
SNOBOL
-u 1,12,20,44
UNIVAC 1100 Assembler
Repetitive
-n A repetitive specification requests tabs at columns 1+n, 1+2*n, etc., where n is a
single-digit decimal number. Of particular importance is the value 8: this repre-
sents the UNIX system ``standard'' tab setting, and is the most likely tab setting
to be found at a terminal. When -0 is used, the tab stops are cleared and no new
ones are set.
Arbitrary
See OPERANDS.
File
-file If the name of a file is given, tabs reads the first line of the file, searching
for a format specification (see fspec(4)). If it finds one there, it sets the tab
stops according to it, otherwise it sets them as -8. This type of specification
may be used to make sure that a tabbed file is printed with correct tab settings,
and would be used with the pr command:
example% tabs - file; pr file
Tab and margin setting is performed via the standard output.
OPERANDS
The following operand is supported:
n1[,n2,...] The arbitrary format consists of tab-stop values separated by commas
or spaces. The tab-stop values must be positive decimal integers in
ascending order. Up to 40 numbers are allowed. If any number (except
the first one) is preceded by a plus sign, it is taken as an incre-
ment to be added to the previous value. Thus, the formats
1,10,20,30, and 1,10,+10,+10 are considered identical.
EXAMPLES
Example 1 Using the tabs command
The following command is an example using -code ( canned specification) to set tabs to the
settings required by the IBM assembler: columns 1, 10, 16, 36, 72:
example% tabs -a
The next command is an example of using -n (repetitive specification), where n is 8,
causes tabs to be set every eighth position: 1+(1*8), 1+(2*8), ... which evaluate to col-
umns 9, 17, ...:
example% tabs -8
This command uses n1,n2,... (arbitrary specification) to set tabs at columns 1, 8, and 36:
example% tabs 1,8,36
The last command is an example of using -file (file specification) to indicate that tabs
should be set according to the first line of $HOME/fspec.list/att4425 (see fspec(4)).
example% tabs -$HOME/fspec.list/att4425
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the
execution of tabs: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.
TERM Determine the terminal type. If this variable is unset or null, and if the -T
option is not specified, terminal type ansi+tabs will be used.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
expand(1), newform(1), pr(1), stty(1), tput(1), fspec(4), terminfo(4), attributes(5), env-
iron(5), term(5), standards(5)
NOTES
There is no consistency among different terminals regarding ways of clearing tabs and set-
ting the left margin.
tabs clears only 20 tabs (on terminals requiring a long sequence), but is willing to set
64.
The tabspec used with the tabs command is different from the one used with the newform
command. For example, tabs -8 sets every eighth position; whereas newform -i-8 indicates
that tabs are set every eighth position.
SunOS 5.11 1 Feb 1995 tabs(1) |
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