Messages in this thread | | | Date | Mon, 19 Feb 2001 08:45:19 -0600 (CST) | From | Jeff Garzik <> | Subject | Re: sendfile from char device? |
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On Mon, 19 Feb 2001, Matthew Kirkwood wrote: > I'm looking for a fast way to initialise a file to zeroes > (without holes) and reckoned that sendfile from /dev/zero > would be the way to go. > > But, unfortunately, sendfile (in 2.2 and 2.4) appears not > to support sendfile(2)ing a device:
Correct... sendfile(2) is only for sources/destinations that can be ripped through the page cache. I converted Lineo's BusyBox to use sendfile, only to see it die when used on anything but a normal file or a socket.
Jeff
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