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package IO::Page; |
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3
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751
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use strict; |
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46
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4
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1
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1
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use vars qw( $VERSION ); |
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279
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6
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$VERSION = '0.02'; |
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8
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local( *PAGER, *STDOLD, ) ; |
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10
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BEGIN { |
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my( $try, $pager, ) ; |
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1
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50
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102
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if ( -t STDOUT ) { |
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# only bother to check if we're going to page |
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# other fallbacks could be `which less`, `which more`, etc |
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TRY: |
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0
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0
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foreach $try ( $ENV{PAGER}, |
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'/usr/local/bin/less', |
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'/usr/bin/less', |
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'/usr/bin/more', |
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) { |
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0
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0
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eval { chomp $try } ; |
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0
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0
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0
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if ( -x $try ) { |
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0
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0
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$pager = $try ; |
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0
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0
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last TRY ; |
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} |
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} |
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0
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0
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0
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die "Couldn't find a pager!\n" unless -x $pager ; |
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0
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0
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open PAGER, "| $pager" |
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or die "Can't pipe to $pager: $!" ; |
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0
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0
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open STDOLD, ">&STDOUT" |
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or die "Can't save STDOUT: $!" ; |
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0
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open STDOUT, ">&PAGER" |
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or die "Can't dup STDOUT to PAGER: $!" ; |
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} |
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} |
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40
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END { |
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1
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50
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1
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if ( fileno STDOLD ) { |
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0
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0
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open STDOUT, ">&STDOLD" |
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or die "Can't restore STDOUT: $!" ; |
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} |
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1
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close PAGER ; |
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} |
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48
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# module loaded OK! |
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1 ; |
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51
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__END__ |