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Man Pages


Manual Reference Pages  -  TABS (1)

NAME

tabs - set terminal tabs

CONTENTS

Synopsis
Description
Environment
Exit Status
See Also
Standards
History
Bugs

SYNOPSIS

tabs [n |-a -| -a2 -| -c -| -c2 -| -c3 -| -f -| -p -| -s -| -u ] [+m [n]] [-T type] tabs [-T type] [+ [n]] n1 [,n2, ...]

DESCRIPTION

The tabs utility displays a series of characters that clear the hardware terminal tab settings then initialises tab stops at specified positions, and optionally adjusts the margin.

In the first synopsis form, the tab stops set depend on the command line options used, and may be one of the predefined formats or at regular intervals.

In the second synopsis form, tab stops are set at positions n1, n2, etc. If a position is preceded by a +’, it is relative to the previous position set. No more than 20 positions may be specified.

If no tab stops are specified, the "standard" Unix tab width of 8 is used.

The options are as follows:
n Set a tab stop every n columns. If n is 0, the tab stops are cleared but no new ones are set.
-a Assembler format (columns 1, 10, 16, 36, 72).
-a2 Assembler format (columns 1, 10, 16, 40, 72).
-c COBOL normal format (columns 1, 8, 12, 16, 20, 55)
-c2 COBOL compact format (columns 1, 6, 10, 14, 49)
-c3 COBOL compact format (columns 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 67).
-f FORTRAN format (columns 1, 7, 11, 15, 19, 23).
-p PL/1 format (columns 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61).
-s SNOBOL format (columns 1, 10, 55).
-u Assembler format (columns 1, 12, 20, 44).
+m [n], + [n]
  Set an n character left margin, or 10 if n is omitted.
-T type
  Output escape sequence for the terminal type type.

ENVIRONMENT

The LANG, LC_ALL, LC_CTYPE and TERM environment variables affect the execution of tabs as described in environ(7).

The -T option overrides the setting of the TERM environment variable. If neither TERM nor the -T option are present, tabs will fail.

EXIT STATUS


.Ex -std

SEE ALSO

expand(1), stty(1), tput(1), unexpand(1), termcap(5)

STANDARDS

The tabs utility conforms to -p1003.1-2001.

HISTORY

A tabs utility appeared in PWB UNIX. This implementation was introduced in
.Fx 5.0 .

BUGS

The current termcap(5) database does not define the ML’ (set left soft margin) capability for any terminals.
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