63 lines
1.1 KiB
Perl
63 lines
1.1 KiB
Perl
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# By Brandon S. Allbery
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#
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# Usage: $cwd = &getcwd;
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sub getcwd
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{
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local($dotdots, $cwd, @pst, @cst, $dir, @tst);
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unless (@cst = stat('.'))
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{
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warn "stat(.): $!";
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return '';
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}
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$cwd = '';
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do
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{
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$dotdots .= '/' if $dotdots;
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$dotdots .= '..';
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@pst = @cst;
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unless (opendir(getcwd'PARENT, $dotdots)) #'))
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{
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warn "opendir($dotdots): $!";
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return '';
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}
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unless (@cst = stat($dotdots))
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{
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warn "stat($dotdots): $!";
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closedir(getcwd'PARENT); #');
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return '';
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}
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if ($pst[$[] == $cst[$[] && $pst[$[ + 1] == $cst[$[ + 1])
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{
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$dir = '';
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}
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else
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{
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do
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{
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unless (defined ($dir = readdir(getcwd'PARENT))) #'))
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{
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warn "readdir($dotdots): $!";
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closedir(getcwd'PARENT); #');
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return '';
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}
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unless (@tst = lstat("$dotdots/$dir"))
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{
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# warn "lstat($dotdots/$dir): $!";
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# closedir(getcwd'PARENT); #');
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# return '';
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}
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}
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while ($dir eq '.' || $dir eq '..' || $tst[$[] != $pst[$[] ||
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$tst[$[ + 1] != $pst[$[ + 1]);
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}
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$cwd = "$dir/$cwd";
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closedir(getcwd'PARENT); #');
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} while ($dir ne '');
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chop($cwd);
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$cwd;
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}
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1;
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