Re: Is there a "make hole" (truncate in middle) syscall?

[Måns Rullgård]

Mike Fedyk <mfedyk@xxxxxxxxxxxxx> writes:

>> I found this paragraph in the man page of GNU cp:
>> 
>>        --sparse=WHEN
>>               always Always make the output file sparse.  This is
>>                      useful when the  input  file  resides  on  a
>>                      filesystem  that  does  not  support  sparse
>>                      files, but the output file is on a  filesys-
>>                      tem that does.
>
> So with this, you can create sparse files for an entire set of files
> by just cping them? :)

Yes.  It won't query the system for where any potential holes in the
source files might be, though, so if there are large holes, cp will
spend unnecessary time crunching through them.

-- 
Måns Rullgård
mru@xxxxxx

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