Check the cygpath command. It'll help you translate between the cygwin and Win/DOS paths.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

Is there a env variable which I can set on the cmd window so that all the paths are WIN paths?

The point of cygwin is to be able to compile and run applications designed for unix with minimal change. Unix applications aren't designed to handle absolute paths to start with something other than "/" and they don't have a concept of a work directory per drive. Nearly every application would have to be changed to support this switch you describe, so I doubt its existence.

Something like

#!/usr/bin/perl --

use strict;
use warnings;

Main( @ARGV );
exit( 0 );

sub Main {
    print Plath(
        join ':',
            '.',
            '/usr/local/bin',
            '/mingw/bin',
            '/bin',
            '/c/WINDOWS/system32',
            '/c/WINDOWS',
            '/local/bin',
            '/mingw/bin',
    ),"\n";
    print Plath( '.:/bin:/cygdrive/e/8660_qnx/1014/HY/data/install' ),
+"\n";
}

BEGIN {
    my $CygwinPaths = eval { require Filesys::CygwinPaths; 1; };
    my $Stat = qx!stat.exe -c %n /!;
    
    sub Plath {
        my( $path ) = @_;
        my @path;

        for my $p ( split ':', $path ) {
            if( $CygwinPaths ){
                push @path, Filesys::CygwinPaths::fullwin32path($p);
            } elsif( $Stat) {
                push @path, qx!stat -c %n $p!;
            } else {
                push @path, $p if $p =~ s!^/([a-z]{1,2})/!$1:/!;
                push @path, $p if $p =~ s!^/cygdrive/([a-z]{1,2})/!$1:
+/!;
            }
        }
        
        return join ';', @path;
    }
}
__END__
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