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Don, The functionality you need is "/dev/null". Indeed, the function of /dev/zero is to provide a file which you can read indefinitely. You should use it like this : dd if=/dev/zero of=<whatever> bs=1024 count=number_of_blocks Regards, Jurgen Don Sharp <dwsharp@iee.org> Sent by: cygwin-owner@cygwin.com 09/25/2003 11:25 AM To: gnuwin32 <cygwin@cygwin.com> cc: (bcc: Jurgen Defurne/BRG/CE/PHILIPS) Subject: cp /dev/zero filename creates large files Classification: Hi I carried out the following sequence of commands $ for i in `cat /tmp/d`; do if [ -f $i.idx ]; then ls -l ${i}*; fi; done -rw-r--r-- 1 don None 0 Jun 17 1998 dtaq -rw-r--r-- 1 don None 3072 Jun 17 1998 dtaq.idx $ cp /dev/zero dtaq.idx The cp appeared to be hanging and the disc was rattling away, so in another window I typed in $ ls -l dtaq* -rw-r--r-- 1 don None 0 Jun 17 1998 dtaq -rw-r--r-- 1 don None 65307648 Jun 17 1998 dtaq.idx and you can see that the reported size of the target of the 'cp /dev/zero' has grown to a considerable size in a short time. Can anyone else reproduce this? Attaching cygcheck.log Cheers Don Sharp-- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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