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- package Term::Cap;
-
- # Since the debugger uses Term::ReadLine which uses Term::Cap, we want
- # to load as few modules as possible. This includes Carp.pm.
- sub carp
- {
- require Carp;
- goto &Carp::carp;
- }
-
- sub croak
- {
- require Carp;
- goto &Carp::croak;
- }
-
- use strict;
-
- use vars qw($VERSION $VMS_TERMCAP);
- use vars qw($termpat $state $first $entry);
-
- $VERSION = '1.12';
-
- # Version undef: Thu Dec 14 20:02:42 CST 1995 by sanders@bsdi.com
- # Version 1.00: Thu Nov 30 23:34:29 EST 2000 by schwern@pobox.com
- # [PATCH] $VERSION crusade, strict, tests, etc... all over lib/
- # Version 1.01: Wed May 23 00:00:00 CST 2001 by d-lewart@uiuc.edu
- # Avoid warnings in Tgetent and Tputs
- # Version 1.02: Sat Nov 17 13:50:39 GMT 2001 by jns@gellyfish.com
- # Altered layout of the POD
- # Added Test::More to PREREQ_PM in Makefile.PL
- # Fixed no argument Tgetent()
- # Version 1.03: Wed Nov 28 10:09:38 GMT 2001
- # VMS Support from Charles Lane <lane@DUPHY4.Physics.Drexel.Edu>
- # Version 1.04: Thu Nov 29 16:22:03 GMT 2001
- # Fixed warnings in test
- # Version 1.05: Mon Dec 3 15:33:49 GMT 2001
- # Don't try to fall back on infocmp if it's not there. From chromatic.
- # Version 1.06: Thu Dec 6 18:43:22 GMT 2001
- # Preload the default VMS termcap from Charles Lane
- # Don't carp at setting OSPEED unless warnings are on.
- # Version 1.07: Wed Jan 2 21:35:09 GMT 2002
- # Sanity check on infocmp output from Norton Allen
- # Repaired INSTALLDIRS thanks to Michael Schwern
- # Version 1.08: Sat Sep 28 11:33:15 BST 2002
- # Late loading of 'Carp' as per Michael Schwern
- # Version 1.09: Tue Apr 20 12:06:51 BST 2004
- # Merged in changes from and to Core
- # Core (Fri Aug 30 14:15:55 CEST 2002):
- # Cope with comments lines from 'infocmp' from Brendan O'Dea
- # Allow for EBCDIC in Tgoto magic test.
- # Version 1.10: Thu Oct 18 16:52:20 BST 2007
- # Don't use try to use $ENV{HOME} if it doesn't exist
- # Give Win32 'dumb' if TERM isn't set
- # Provide fallback 'dumb' termcap entry as last resort
- # Version 1.11: Thu Oct 25 09:33:07 BST 2007
- # EBDIC fixes from Chun Bing Ge <gecb@cn.ibm.com>
- # Version 1.12: Sat Dec 8 00:10:21 GMT 2007
- # QNX test fix from Matt Kraai <kraai@ftbfs.org>
- #
- # TODO:
- # support Berkeley DB termcaps
- # force $FH into callers package?
- # keep $FH in object at Tgetent time?
-
- =head1 NAME
-
- Term::Cap - Perl termcap interface
-
- =head1 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, $FH);
-
- =head1 DESCRIPTION
-
- These are low-level functions to extract and use capabilities from
- a terminal capability (termcap) database.
-
- More information on the terminal capabilities will be found in the
- termcap manpage on most Unix-like systems.
-
- =head2 METHODS
-
- =over 4
-
- The output strings for B<Tputs> are cached for counts of 1 for performance.
- B<Tgoto> and B<Tpad> do not cache. C<$self-E<gt>{_xx}> is the raw termcap
- data and C<$self-E<gt>{xx}> is the cached version.
-
- print $terminal->Tpad($self->{_xx}, 1);
-
- B<Tgoto>, B<Tputs>, and B<Tpad> return the string and will also
- output the string to $FH if specified.
-
-
- =cut
-
- # Preload the default VMS termcap.
- # If a different termcap is required then the text of one can be supplied
- # in $Term::Cap::VMS_TERMCAP before Tgetent is called.
-
- if ( $^O eq 'VMS' )
- {
- chomp( my @entry = <DATA> );
- $VMS_TERMCAP = join '', @entry;
- }
-
- # Returns a list of termcap files to check.
-
- sub termcap_path
- { ## private
- my @termcap_path;
-
- # $TERMCAP, if it's a filespec
- push( @termcap_path, $ENV{TERMCAP} )
- if (
- ( exists $ENV{TERMCAP} )
- && (
- ( $^O eq 'os2' || $^O eq 'MSWin32' || $^O eq 'dos' )
- ? $ENV{TERMCAP} =~ /^[a-z]:[\\\/]/is
- : $ENV{TERMCAP} =~ /^\//s
- )
- );
- if ( ( exists $ENV{TERMPATH} ) && ( $ENV{TERMPATH} ) )
- {
-
- # Add the users $TERMPATH
- push( @termcap_path, split( /(:|\s+)/, $ENV{TERMPATH} ) );
- }
- else
- {
-
- # Defaults
- push( @termcap_path,
- exists $ENV{'HOME'} ? $ENV{'HOME'} . '/.termcap' : undef,
- '/etc/termcap', '/usr/share/misc/termcap', );
- }
-
- # return the list of those termcaps that exist
- return grep { defined $_ && -f $_ } @termcap_path;
- }
-
- =item B<Tgetent>
-
- Returns a blessed object reference which the user can
- then use to send the control strings to the terminal using B<Tputs>
- and B<Tgoto>.
-
- The function extracts the entry of the specified terminal
- type I<TERM> (defaults to the environment variable I<TERM>) from the
- database.
-
- It will look in the environment for a I<TERMCAP> variable. If
- found, and the value does not begin with a slash, and the terminal
- type name is the same as the environment string I<TERM>, the
- I<TERMCAP> string is used instead of reading a termcap file. If
- it does begin with a slash, the string is used as a path name of
- the termcap file to search. If I<TERMCAP> does not begin with a
- slash and name is different from I<TERM>, B<Tgetent> searches the
- files F<$HOME/.termcap>, F</etc/termcap>, and F</usr/share/misc/termcap>,
- in that order, unless the environment variable I<TERMPATH> exists,
- in which case it specifies a list of file pathnames (separated by
- spaces or colons) to be searched B<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 C<:tc=...:> in the I<TERMCAP>
- environment variable string it will continue the search in the
- files as above.
-
- The extracted termcap entry is available in the object
- as C<$self-E<gt>{TERMCAP}>.
-
- It takes a hash reference as an argument with two optional keys:
-
- =over 2
-
- =item 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. I<OSPEED> can be be specified as
- either a POSIX termios/SYSV termio speeds (where 9600 equals 9600) or
- an old DSD-style speed ( where 13 equals 9600).
-
-
- =item 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 B<Tgetent> will croak.
-
- =back
-
- It calls C<croak> on failure.
-
- =cut
-
- sub Tgetent
- { ## public -- static method
- my $class = shift;
- my ($self) = @_;
-
- $self = {} unless defined $self;
- bless $self, $class;
-
- my ( $term, $cap, $search, $field, $max, $tmp_term, $TERMCAP );
- local ( $termpat, $state, $first, $entry ); # used inside eval
- local $_;
-
- # Compute PADDING factor from OSPEED (to be used by Tpad)
- if ( !$self->{OSPEED} )
- {
- if ($^W)
- {
- carp "OSPEED was not set, defaulting to 9600";
- }
- $self->{OSPEED} = 9600;
- }
- if ( $self->{OSPEED} < 16 )
- {
-
- # delays for old style speeds
- my @pad = (
- 0, 200, 133.3, 90.9, 74.3, 66.7, 50, 33.3,
- 16.7, 8.3, 5.5, 4.1, 2, 1, .5, .2
- );
- $self->{PADDING} = $pad[ $self->{OSPEED} ];
- }
- else
- {
- $self->{PADDING} = 10000 / $self->{OSPEED};
- }
-
- unless ( $self->{TERM} )
- {
- if ( $ENV{TERM} )
- {
- $self->{TERM} = $ENV{TERM} ;
- }
- else
- {
- if ( $^O eq 'Win32' )
- {
- $self->{TERM} = 'dumb';
- }
- else
- {
- croak "TERM not set";
- }
- }
- }
-
- $term = $self->{TERM}; # $term is the term type we are looking for
-
- # $tmp_term is always the next term (possibly :tc=...:) we are looking for
- $tmp_term = $self->{TERM};
-
- # protect any pattern metacharacters in $tmp_term
- $termpat = $tmp_term;
- $termpat =~ s/(\W)/\\$1/g;
-
- my $foo = ( exists $ENV{TERMCAP} ? $ENV{TERMCAP} : '' );
-
- # $entry is the extracted termcap entry
- if ( ( $foo !~ m:^/:s ) && ( $foo =~ m/(^|\|)${termpat}[:|]/s ) )
- {
- $entry = $foo;
- }
-
- my @termcap_path = termcap_path();
-
- unless ( @termcap_path || $entry )
- {
-
- # last resort--fake up a termcap from terminfo
- local $ENV{TERM} = $term;
-
- if ( $^O eq 'VMS' )
- {
- $entry = $VMS_TERMCAP;
- }
- else
- {
- if ( grep { -x "$_/infocmp" } split /:/, $ENV{PATH} )
- {
- eval {
- my $tmp = `infocmp -C 2>/dev/null`;
- $tmp =~ s/^#.*\n//gm; # remove comments
- if ( ( $tmp !~ m%^/%s )
- && ( $tmp =~ /(^|\|)${termpat}[:|]/s ) )
- {
- $entry = $tmp;
- }
- };
- }
- else
- {
- # this is getting desperate now
- if ( $self->{TERM} eq 'dumb' )
- {
- $entry = 'dumb|80-column dumb tty::am::co#80::bl=^G:cr=^M:do=^J:sf=^J:';
- }
- }
- }
- }
-
- croak "Can't find a valid termcap file" unless @termcap_path || $entry;
-
- $state = 1; # 0 == finished
- # 1 == next file
- # 2 == search again
-
- $first = 0; # first entry (keeps term name)
-
- $max = 32; # max :tc=...:'s
-
- if ($entry)
- {
-
- # ok, we're starting with $TERMCAP
- $first++; # we're the first entry
- # do we need to continue?
- if ( $entry =~ s/:tc=([^:]+):/:/ )
- {
- $tmp_term = $1;
-
- # protect any pattern metacharacters in $tmp_term
- $termpat = $tmp_term;
- $termpat =~ s/(\W)/\\$1/g;
- }
- else
- {
- $state = 0; # we're already finished
- }
- }
-
- # This is eval'ed inside the while loop for each file
- $search = q{
- while (<TERMCAP>) {
- next if /^\\t/ || /^#/;
- if ($_ =~ m/(^|\\|)${termpat}[:|]/o) {
- chomp;
- s/^[^:]*:// if $first++;
- $state = 0;
- while ($_ =~ s/\\\\$//) {
- defined(my $x = <TERMCAP>) or last;
- $_ .= $x; chomp;
- }
- last;
- }
- }
- defined $entry or $entry = '';
- $entry .= $_ if $_;
- };
-
- while ( $state != 0 )
- {
- if ( $state == 1 )
- {
-
- # get the next TERMCAP
- $TERMCAP = shift @termcap_path
- || croak "failed termcap lookup on $tmp_term";
- }
- else
- {
-
- # do the same file again
- # prevent endless recursion
- $max-- || croak "failed termcap loop at $tmp_term";
- $state = 1; # ok, maybe do a new file next time
- }
-
- open( TERMCAP, "< $TERMCAP\0" ) || croak "open $TERMCAP: $!";
- eval $search;
- die $@ if $@;
- close TERMCAP;
-
- # If :tc=...: found then search this file again
- $entry =~ s/:tc=([^:]+):/:/ && ( $tmp_term = $1, $state = 2 );
-
- # protect any pattern metacharacters in $tmp_term
- $termpat = $tmp_term;
- $termpat =~ s/(\W)/\\$1/g;
- }
-
- croak "Can't find $term" if $entry eq '';
- $entry =~ s/:+\s*:+/:/g; # cleanup $entry
- $entry =~ s/:+/:/g; # cleanup $entry
- $self->{TERMCAP} = $entry; # save it
- # print STDERR "DEBUG: $entry = ", $entry, "\n";
-
- # Precompile $entry into the object
- $entry =~ s/^[^:]*://;
- foreach $field ( split( /:[\s:\\]*/, $entry ) )
- {
- if ( defined $field && $field =~ /^(\w\w)$/ )
- {
- $self->{ '_' . $field } = 1 unless defined $self->{ '_' . $1 };
-
- # print STDERR "DEBUG: flag $1\n";
- }
- elsif ( defined $field && $field =~ /^(\w\w)\@/ )
- {
- $self->{ '_' . $1 } = "";
-
- # print STDERR "DEBUG: unset $1\n";
- }
- elsif ( defined $field && $field =~ /^(\w\w)#(.*)/ )
- {
- $self->{ '_' . $1 } = $2 unless defined $self->{ '_' . $1 };
-
- # print STDERR "DEBUG: numeric $1 = $2\n";
- }
- elsif ( defined $field && $field =~ /^(\w\w)=(.*)/ )
- {
-
- # print STDERR "DEBUG: string $1 = $2\n";
- next if defined $self->{ '_' . ( $cap = $1 ) };
- $_ = $2;
- if ( ord('A') == 193 )
- {
- s/\\E/\047/g;
- s/\\(\d\d\d)/pack('c',oct($1) & 0177)/eg;
- s/\\n/\n/g;
- s/\\r/\r/g;
- s/\\t/\t/g;
- s/\\b/\b/g;
- s/\\f/\f/g;
- s/\\\^/\337/g;
- s/\^\?/\007/g;
- s/\^(.)/pack('c',ord($1) & 31)/eg;
- s/\\(.)/$1/g;
- s/\337/^/g;
- }
- else
- {
- s/\\E/\033/g;
- s/\\(\d\d\d)/pack('c',oct($1) & 0177)/eg;
- s/\\n/\n/g;
- s/\\r/\r/g;
- s/\\t/\t/g;
- s/\\b/\b/g;
- s/\\f/\f/g;
- s/\\\^/\377/g;
- s/\^\?/\177/g;
- s/\^(.)/pack('c',ord($1) & 31)/eg;
- s/\\(.)/$1/g;
- s/\377/^/g;
- }
- $self->{ '_' . $cap } = $_;
- }
-
- # else { carp "junk in $term ignored: $field"; }
- }
- $self->{'_pc'} = "\0" unless defined $self->{'_pc'};
- $self->{'_bc'} = "\b" unless defined $self->{'_bc'};
- $self;
- }
-
- # $terminal->Tpad($string, $cnt, $FH);
-
- =item B<Tpad>
-
- Outputs a literal string with appropriate padding for the current terminal.
-
- It takes three arguments:
-
- =over 2
-
- =item B<$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 me multiplied by $cnt. This part
- of $string is removed before output/
-
- =item B<$cnt>
-
- Will be used to modify the padding applied to string as described above.
-
- =item B<$FH>
-
- An optional filehandle (or IO::Handle ) that output will be printed to.
-
- =back
-
- The padded $string is returned.
-
- =cut
-
- sub Tpad
- { ## public
- my $self = shift;
- my ( $string, $cnt, $FH ) = @_;
- my ( $decr, $ms );
-
- if ( defined $string && $string =~ /(^[\d.]+)(\*?)(.*)$/ )
- {
- $ms = $1;
- $ms *= $cnt if $2;
- $string = $3;
- $decr = $self->{PADDING};
- if ( $decr > .1 )
- {
- $ms += $decr / 2;
- $string .= $self->{'_pc'} x ( $ms / $decr );
- }
- }
- print $FH $string if $FH;
- $string;
- }
-
- # $terminal->Tputs($cap, $cnt, $FH);
-
- =item B<Tputs>
-
- Output the string for the given capability padded as appropriate without
- any parameter substitution.
-
- It takes three arguments:
-
- =over 2
-
- =item B<$cap>
-
- The capability whose string is to be output.
-
- =item B<$cnt>
-
- A count passed to Tpad to modify the padding applied to the output string.
- If $cnt is zero or one then the resulting string will be cached.
-
- =item B<$FH>
-
- An optional filehandle (or IO::Handle ) that output will be printed to.
-
- =back
-
- The appropriate string for the capability will be returned.
-
- =cut
-
- sub Tputs
- { ## public
- my $self = shift;
- my ( $cap, $cnt, $FH ) = @_;
- my $string;
-
- $cnt = 0 unless $cnt;
-
- if ( $cnt > 1 )
- {
- $string = Tpad( $self, $self->{ '_' . $cap }, $cnt );
- }
- else
- {
-
- # cache result because Tpad can be slow
- unless ( exists $self->{$cap} )
- {
- $self->{$cap} =
- exists $self->{"_$cap"}
- ? Tpad( $self, $self->{"_$cap"}, 1 )
- : undef;
- }
- $string = $self->{$cap};
- }
- print $FH $string if $FH;
- $string;
- }
-
- # $terminal->Tgoto($cap, $col, $row, $FH);
-
- =item B<Tgoto>
-
- B<Tgoto> decodes a cursor addressing string with the given parameters.
-
- There are four arguments:
-
- =over 2
-
- =item B<$cap>
-
- The name of the capability to be output.
-
- =item B<$col>
-
- The first value to be substituted in the output string ( usually the column
- in a cursor addressing capability )
-
- =item B<$row>
-
- The second value to be substituted in the output string (usually the row
- in cursor addressing capabilities)
-
- =item B<$FH>
-
- An optional filehandle (or IO::Handle ) to which the output string will be
- printed.
-
- =back
-
- 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.
-
- =cut
-
- sub Tgoto
- { ## public
- my $self = shift;
- my ( $cap, $code, $tmp, $FH ) = @_;
- my $string = $self->{ '_' . $cap };
- my $result = '';
- my $after = '';
- my $online = 0;
- my @tmp = ( $tmp, $code );
- my $cnt = $code;
-
- while ( $string =~ /^([^%]*)%(.)(.*)/ )
- {
- $result .= $1;
- $code = $2;
- $string = $3;
- if ( $code eq 'd' )
- {
- $result .= sprintf( "%d", shift(@tmp) );
- }
- elsif ( $code eq '.' )
- {
- $tmp = shift(@tmp);
- if ( $tmp == 0 || $tmp == 4 || $tmp == 10 )
- {
- if ($online)
- {
- ++$tmp, $after .= $self->{'_up'} if $self->{'_up'};
- }
- else
- {
- ++$tmp, $after .= $self->{'_bc'};
- }
- }
- $result .= sprintf( "%c", $tmp );
- $online = !$online;
- }
- elsif ( $code eq '+' )
- {
- $result .= sprintf( "%c", shift(@tmp) + ord($string) );
- $string = substr( $string, 1, 99 );
- $online = !$online;
- }
- elsif ( $code eq 'r' )
- {
- ( $code, $tmp ) = @tmp;
- @tmp = ( $tmp, $code );
- $online = !$online;
- }
- elsif ( $code eq '>' )
- {
- ( $code, $tmp, $string ) = unpack( "CCa99", $string );
- if ( $tmp[$[] > $code )
- {
- $tmp[$[] += $tmp;
- }
- }
- elsif ( $code eq '2' )
- {
- $result .= sprintf( "%02d", shift(@tmp) );
- $online = !$online;
- }
- elsif ( $code eq '3' )
- {
- $result .= sprintf( "%03d", shift(@tmp) );
- $online = !$online;
- }
- elsif ( $code eq 'i' )
- {
- ( $code, $tmp ) = @tmp;
- @tmp = ( $code + 1, $tmp + 1 );
- }
- else
- {
- return "OOPS";
- }
- }
- $string = Tpad( $self, $result . $string . $after, $cnt );
- print $FH $string if $FH;
- $string;
- }
-
- # $terminal->Trequire(qw/ce ku kd/);
-
- =item B<Trequire>
-
- Takes a list of capabilities as an argument and will croak if one is not
- found.
-
- =cut
-
- sub Trequire
- { ## public
- my $self = shift;
- my ( $cap, @undefined );
- foreach $cap (@_)
- {
- push( @undefined, $cap )
- unless defined $self->{ '_' . $cap } && $self->{ '_' . $cap };
- }
- croak "Terminal does not support: (@undefined)" if @undefined;
- }
-
- =back
-
- =head1 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);
-
- =head1 COPYRIGHT AND LICENSE
-
- Please see the README file in distribution.
-
- =head1 AUTHOR
-
- This module is part of the core Perl distribution and is also maintained
- for CPAN by Jonathan Stowe <jns@gellyfish.com>.
-
- =head1 SEE ALSO
-
- termcap(5)
-
- =cut
-
- # Below is a default entry for systems where there are terminals but no
- # termcap
- 1;
- __DATA__
- vt220|vt200|DEC VT220 in vt100 emulation mode:
- am:mi:xn:xo:
- co#80:li#24:
- RA=\E[?7l:SA=\E[?7h:
- ac=kkllmmjjnnwwqquuttvvxx:ae=\E(B:al=\E[L:as=\E(0:
- bl=^G:cd=\E[J:ce=\E[K:cl=\E[H\E[2J:cm=\E[%i%d;%dH:
- cr=^M:cs=\E[%i%d;%dr:dc=\E[P:dl=\E[M:do=\E[B:
- ei=\E[4l:ho=\E[H:im=\E[4h:
- is=\E[1;24r\E[24;1H:
- nd=\E[C:
- kd=\E[B::kl=\E[D:kr=\E[C:ku=\E[A:le=^H:
- mb=\E[5m:md=\E[1m:me=\E[m:mr=\E[7m:
- kb=\0177:
- r2=\E>\E[24;1H\E[?3l\E[?4l\E[?5l\E[?7h\E[?8h\E=:rc=\E8:
- sc=\E7:se=\E[27m:sf=\ED:so=\E[7m:sr=\EM:ta=^I:
- ue=\E[24m:up=\E[A:us=\E[4m:ve=\E[?25h:vi=\E[?25l:
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