47 lines
850 B
Perl
47 lines
850 B
Perl
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# Open in their package.
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sub cacheout'open {
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open($_[0], $_[1]);
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}
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# Close as well
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sub cacheout'close {
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close($_[0]);
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}
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# But only this sub name is visible to them.
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sub cacheout {
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package cacheout;
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($file) = @_;
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if (!$isopen{$file}) {
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if (++$numopen > $maxopen) {
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local(@lru) = sort {$isopen{$a} <=> $isopen{$b};} keys(%isopen);
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splice(@lru, $maxopen / 3);
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$numopen -= @lru;
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for (@lru) { &close($_); delete $isopen{$_}; }
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}
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&open($file, ($saw{$file}++ ? '>>' : '>') . $file)
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|| die "Can't create $file: $!\n";
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}
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$isopen{$file} = ++$seq;
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}
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package cacheout;
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$seq = 0;
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$numopen = 0;
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if (open(PARAM,'/usr/include/sys/param.h')) {
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local($_, $.);
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while (<PARAM>) {
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$maxopen = $1 - 4 if /^\s*#\s*define\s+NOFILE\s+(\d+)/;
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}
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close PARAM;
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}
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$maxopen = 16 unless $maxopen;
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1;
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