BIO_DELETE equivalent for file on FFS filesystem

[Wojciech Puchar]

>>
>> i could write simple program to find out what blocks are unused and
>> then...do nothing.
>
> Actually you can. Use dd if=infile of=outfile conv=sparse to convert a file to a
> sparse file. This obviously only works on filesystems supporting sparse files,
> such as UFS.

of course i can by copying. not really what i want

>
> Regards,
> Pieter
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