distrib/lib/getcwd.pl

# By Brandon S. Allbery
#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternative: Cwd
#
#
# Usage: $cwd = &getcwd;

sub getcwd
{
    local($dotdots, $cwd, @pst, @cst, $dir, @tst);

    unless (@cst = stat('.'))
    {
    warn "stat(.): $!";
    return '';
    }
    $cwd = '';
    do
    {
    $dotdots .= '/' if $dotdots;
    $dotdots .= '..';
    @pst = @cst;
    unless (opendir(getcwd'PARENT, $dotdots))           #'))
    {
        warn "opendir($dotdots): $!";
        return '';
    }
    unless (@cst = stat($dotdots))
    {
        warn "stat($dotdots): $!";
        closedir(getcwd'PARENT);                    #');
        return '';
    }
    if ($pst[$[] == $cst[$[] && $pst[$[ + 1] == $cst[$[ + 1])
    {
        $dir = '';
    }
    else
    {
        do
        {
        unless (defined ($dir = readdir(getcwd'PARENT)))        #'))
        {
            warn "readdir($dotdots): $!";
            closedir(getcwd'PARENT);                #');
            return '';
        }
        unless (@tst = lstat("$dotdots/$dir"))
        {
            # warn "lstat($dotdots/$dir): $!";
            # closedir(getcwd'PARENT);              #');
            # return '';
        }
        }
        while ($dir eq '.' || $dir eq '..' || $tst[$[] != $pst[$[] ||
           $tst[$[ + 1] != $pst[$[ + 1]);
    }
    $cwd = "$dir/$cwd";
    closedir(getcwd'PARENT);                    #');
    } while ($dir ne '');
    chop($cwd);
    $cwd;
}

1;