tabs - set tabs on a terminal


     tabs [ -n  | --file [ [-code] | -a | -a2 | -c | -c2 | -c3  |
     -f | -p | -s | -u] ]  [ +m [n]] [-T type]

     tabs [-T type] [ + m [n]] n1 [ , n2 ,...]


     The tabs utility sets the tab stops on the  user's  terminal
     according  to a tab specification, after clearing any previ-
     ous settings. The user's terminal must have  remotely  sett-
     able hardware tabs.


     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 environ-
           ment (see environ(5)), tabs uses ansi+tabs as the ter-
           minal 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,   repetitive   (-n),  arbitrary
     (n1,n2,...), and file (-file).

     If no tab specification is given, the default value  is  -8,
     that  is,  UNIX  system ``standard'' 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

  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 character 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

                <: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

                <:t-c3 m6 s66 d:>

     -f    1,7,11,15,19,23


     -p    1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61


     -s    1,10,55


     -u    1,12,20,44

           UNIVAC 1100 Assembler

     -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
           represents  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.

     See OPERANDS.

     -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 set-
           tings, and would be used with the pr command:

           example% tabs - file; pr file

     Tab and margin setting is performed via the standard output.


     The following operand is supported:

                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 increment to be
                added to the previous value.  Thus,  the  formats
                1,10,20,30,   and   1,10,+10,+10  are  considered


     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
     columns 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 specifi-
     cation) 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


     See environ(5) for descriptions of the following environment
     variables  that  affect the execution of tabs: LANG, LC_ALL,

     TERM  Determine the terminal type. If this variable is unset
           or null, and if the -T option is not specified, termi-
           nal type ansi+tabs will be used.


     The following exit values are returned:

     0     Successful completion.

     >0    An error occurred.


     See attributes(5) for descriptions of the  following  attri-

    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    | Availability                | SUNWcsu                     |
    | CSI                         | enabled                     |
    | Interface Stability         | Standard                    |


     expand(1), newform(1), pr(1),  stty(1),  tput(1),  fspec(4),
     terminfo(4),   attributes(5),   environ(5),  term(5),  stan-


     There is no consistency among different terminals  regarding
     ways of clearing tabs and setting 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.

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