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: