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$FreeBSD: releng/10.3/usr.bin/tabs/tabs.1 140368 2005-01-17 07:44:44Z ru $
.Dd May 20, 2002 .Dt TABS 1 .Os .Sh NAME .Nm tabs .Nd set terminal tabs .Sh SYNOPSIS .Nm .Op Fl Ar n | Fl a | a2 | c | c2 | c3 | f | p | s | u .Op Cm +m Ns Op Ar n .Op Fl T Ar type .Nm .Op Fl T Ar type .Op Cm + Ns Op Ar n .Ar n1 Ns Op Ns , Ns Ar n2 , Ns ... .Sh DESCRIPTION The .Nm 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.
p 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.
p In the second synopsis form, tab stops are set at positions .Ar n1 , n2 , etc. If a position is preceded by a .Ql + , it is relative to the previous position set. No more than 20 positions may be specified.
p If no tab stops are specified, the .Dq standard x tab width of 8 is used.
p The options are as follows: l -tag -width indent t Fl Ar n Set a tab stop every .Ar n columns. If .Ar n is 0, the tab stops are cleared but no new ones are set. t Fl a Assembler format (columns 1, 10, 16, 36, 72). t Fl a2 Assembler format (columns 1, 10, 16, 40, 72). t Fl c .Tn COBOL normal format (columns 1, 8, 12, 16, 20, 55) t Fl c2 .Tn COBOL compact format (columns 1, 6, 10, 14, 49) t Fl c3 .Tn COBOL compact format (columns 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 67). t Fl f .Tn FORTRAN format (columns 1, 7, 11, 15, 19, 23). t Fl p .Tn PL/1 format (columns 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61). t Fl s .Tn SNOBOL format (columns 1, 10, 55). t Fl u Assembler format (columns 1, 12, 20, 44). t Xo .Cm +m Ns Op Ar n , .Cm + Ns Op Ar n .Xc Set an .Ar n character left margin, or 10 if .Ar n is omitted. t Fl T Ar type Output escape sequence for the terminal type .Ar type . .El .Sh ENVIRONMENT The .Ev LANG , LC_ALL , LC_CTYPE and .Ev TERM environment variables affect the execution of .Nm as described in .Xr environ 7 .
p The .Fl T option overrides the setting of the .Ev TERM environment variable. If neither .Ev TERM nor the .Fl T option are present, .Nm will fail. .Sh EXIT STATUS .Ex -std .Sh SEE ALSO .Xr expand 1 , .Xr stty 1 , .Xr tput 1 , .Xr unexpand 1 , .Xr termcap 5 .Sh STANDARDS The .Nm utility conforms to .St -p1003.1-2001 . .Sh HISTORY A .Nm utility appeared in PWB UNIX. This implementation was introduced in .Fx 5.0 . .Sh BUGS The current .Xr termcap 5 database does not define the .Ql ML (set left soft margin) capability for any terminals.