On 2008-04-22 18:13 +0200, Jordi Gutiérrez Hermoso wrote: > On 22/04/2008, Sven Joachim <[EMAIL PROTECTED]> wrote: >> No, you would only zero out the disk if you cat /dev/zero to it. >> Catting /dev/null immediately returns and does nothing. > > Hm at least catting /dev/null to a full file makes the file now be 0 > bytes long.
That's because the shell opens the file with the O_TRUNC flag. If you try the same with a device file, nothing happens because O_TRUNC is ignored then. See open(2). > I'm not going to test what it does to my hard drive, of > course. ;-) If you still have a floppy drive, you can test with that, this is what I did. Sven -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
