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NAME

       Term::Cap - Perl termcap interface

SYNOPSIS

           require Term::Cap;
           $terminal = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed };
           $terminal->Trequire(qw/ce ku kd/);
           $terminal->Tgoto('cm', $col, $row, $FH);
           $terminal->Tputs('dl', $count, $FH);
           $terminal->Tpad($string, $count, $FH);

DESCRIPTION

       These are low-level functions to extract and use capabilities from a terminal capability
       (termcap) database.

       More information on the terminal capabilities will be found in the termcap manpage on most
       Unix-like systems.

   METHODS
       The output strings for Tputs are cached for counts of 1 for performance.  Tgoto and Tpad
       do not cache.  "$self->{_xx}" is the raw termcap data and "$self->{xx}" is the cached
       version.

           print $terminal->Tpad($self->{_xx}, 1);

       Tgoto, Tputs, and Tpad return the string and will also output the string to $FH if
       specified.

       Tgetent
           Returns a blessed object reference which the user can then use to send the control
           strings to the terminal using Tputs and Tgoto.

           The function extracts the entry of the specified terminal type TERM (defaults to the
           environment variable TERM) from the database.

           It will look in the environment for a TERMCAP variable.  If found, and the value does
           not begin with a slash, and the terminal type name is the same as the environment
           string TERM, the TERMCAP string is used instead of reading a termcap file.  If it does
           begin with a slash, the string is used as a path name of the termcap file to search.
           If TERMCAP does not begin with a slash and name is different from TERM, Tgetent
           searches the files $HOME/.termcap, /etc/termcap, and /usr/share/misc/termcap, in that
           order, unless the environment variable TERMPATH exists, in which case it specifies a
           list of file pathnames (separated by spaces or colons) to be searched instead.
           Whenever multiple files are searched and a tc field occurs in the requested entry, the
           entry it names must be found in the same file or one of the succeeding files.  If
           there is a ":tc=...:" in the TERMCAP environment variable string it will continue the
           search in the files as above.

           The extracted termcap entry is available in the object as "$self->{TERMCAP}".

           It takes a hash reference as an argument with two optional keys:

           OSPEED
             The terminal output bit rate (often mistakenly called the baud rate) for this
             terminal - if not set a warning will be generated and it will be defaulted to 9600.
             OSPEED can be specified as either a POSIX termios/SYSV termio speeds (where 9600
             equals 9600) or an old DSD-style speed ( where 13 equals 9600).

           TERM
             The terminal type whose termcap entry will be used - if not supplied it will default
             to $ENV{TERM}: if that is not set then Tgetent will croak.

           It calls "croak" on failure.

       Tpad
           Outputs a literal string with appropriate padding for the current terminal.

           It takes three arguments:

           $string
             The literal string to be output.  If it starts with a number and an optional '*'
             then the padding will be increased by an amount relative to this number, if the '*'
             is present then this amount will be multiplied by $cnt.  This part of $string is
             removed before output/

           $cnt
             Will be used to modify the padding applied to string as described above.

           $FH
             An optional filehandle (or IO::Handle ) that output will be printed to.

           The padded $string is returned.

       Tputs
           Output the string for the given capability padded as appropriate without any parameter
           substitution.

           It takes three arguments:

           $cap
             The capability whose string is to be output.

           $cnt
             A count passed to Tpad to modify the padding applied to the output string.  If $cnt
             is zero or one then the resulting string will be cached.

           $FH
             An optional filehandle (or IO::Handle ) that output will be printed to.

           The appropriate string for the capability will be returned.

       Tgoto
           Tgoto decodes a cursor addressing string with the given parameters.

           There are four arguments:

           $cap
             The name of the capability to be output.

           $col
             The first value to be substituted in the output string ( usually the column in a
             cursor addressing capability )

           $row
             The second value to be substituted in the output string (usually the row in cursor
             addressing capabilities)

           $FH
             An optional filehandle (or IO::Handle ) to which the output string will be printed.

           Substitutions are made with $col and $row in the output string with the following
           sprintf() line formats:

            %%   output `%'
            %d   output value as in printf %d
            %2   output value as in printf %2d
            %3   output value as in printf %3d
            %.   output value as in printf %c
            %+x  add x to value, then do %.

            %>xy if value > x then add y, no output
            %r   reverse order of two parameters, no output
            %i   increment by one, no output
            %B   BCD (16*(value/10)) + (value%10), no output

            %n   exclusive-or all parameters with 0140 (Datamedia 2500)
            %D   Reverse coding (value - 2*(value%16)), no output (Delta Data)

           The output string will be returned.

       Trequire
           Takes a list of capabilities as an argument and will croak if one is not found.

EXAMPLES

           use Term::Cap;

           # Get terminal output speed
           require POSIX;
           my $termios = new POSIX::Termios;
           $termios->getattr;
           my $ospeed = $termios->getospeed;

           # Old-style ioctl code to get ospeed:
           #     require 'ioctl.pl';
           #     ioctl(TTY,$TIOCGETP,$sgtty);
           #     ($ispeed,$ospeed) = unpack('cc',$sgtty);

           # allocate and initialize a terminal structure
           $terminal = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed };

           # require certain capabilities to be available
           $terminal->Trequire(qw/ce ku kd/);

           # Output Routines, if $FH is undefined these just return the string

           # Tgoto does the % expansion stuff with the given args
           $terminal->Tgoto('cm', $col, $row, $FH);

           # Tputs doesn't do any % expansion.
           $terminal->Tputs('dl', $count = 1, $FH);

COPYRIGHT AND LICENSE

       Copyright 1995-2015 (c) perl5 porters.

       This software is free software and can be modified and distributed under the same terms as
       Perl itself.

       Please see the file README in the Perl source distribution for details of the Perl
       license.

AUTHOR

       This module is part of the core Perl distribution and is also maintained for CPAN by
       Jonathan Stowe <jns@gellyfish.co.uk>.

       The code is hosted on Github: https://github.com/jonathanstowe/Term-Cap please feel free
       to fork, submit patches etc, etc there.

SEE ALSO

       termcap(5)