Copyright (c) 2008 The NetBSD Foundation, Inc.
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by Roy Marples.
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.Dd December 9, 2008 .Dt TABS 1 .Os .Sh NAME .Nm tabs .Nd set terminal tabs .Sh SYNOPSIS .Nm .Op Fl n Ns | Ns Fl a Ns | Ns Fl a2 Ns | Ns Fl c Ns | Ns Fl c2 \ Ns | Ns Fl c3 Ns | Ns Fl f Ns | Ns Fl p Ns | Ns Fl s Ns | Ns Fl u .Op +m Ns Op n .Op Fl T Ar type .Nm .Op Fl T Ar type .Op + Ns Op n .Ar n1 Ns Op , Ns Ar n2 Ns , Ns Ar ... .Sh DESCRIPTION The .Nm utility displays a series of characters that first clears the hardware terminal tab settings and then initializes the tab stops at the specified positions and optionally adjusts the margin.
p The phrase "tab-stop position N" means that, from the start of a line of output, tabbing to position N shall cause the next character output to be in the (N+1)th column on that line.
p The following options are supported: l -tag -width Fl t Fl Ar n Specifies repetitive tab stops separated by a uniform number of columns, .Ar n , where .Ar n is a single digit decimal number. The default usage of .Nm with no arguments is equivalent to .Nm .Fl 8 . When .Fl 0 is used, the tab stops are cleared and no new ones set. t Fl a Assembler, applicable to some mainframes. Equivalent to .Nm 1,10,16,36,72 . t Fl a2 Assembler, applicable to some mainframes. Equivalent to .Nm 1,10,16,40,72 t Fl c .Tn COBOL , normal format. Equivalent to .Nm 1,8,12,16,20,55 t Fl c2 .Tn COBOL , compact format (columns 1 to 6 omitted). Equivalent to .Nm 1,6,10,14,49 t Fl c3 .Tn COBOL , compact format (columns 1 to 6 omitted), with more tabs than .Fl c2 . Equivalent to .Nm 1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67 t Fl f .Tn FORTRAN . Equivalent to .Nm 1,7,11,15,19,23 t Fl p .Tn PL/1 . Equivalent to .Nm 1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61 t Fl s .Tn SNOBOL . Equivalent to .Nm 1,10,55 t Fl T Ar type Indicates the type of terminal. t Fl u Assembler, applicable to some mainframes. Equivalent to .Nm 1,12,20,44 .El .Sh EXIT STATUS .Ex -std .Sh ENVIRONMENT The .Ev COLUMNS and .Ev TERM environment variables affect the execution of .Nm as described in .Xr environ 7 .
p The .Fl T option overrides .Ev TERM . If neither .Ev TERM nor the .Fl T option are present, .Nm will fail. .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 . .Sh HISTORY A .Nm utility first appeared in PWB UNIX. This implementation was introduced in .Nx 6.0 . .Sh AUTHORS .An Roy Marples Aq roy@NetBSD.org .Sh BUGS The current .Xr termcap 5 database does not define the set left soft margin .Ql ML capability for any terminals.