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

[Peter Chubb]

>>>>> "Rob" == Rob Landley <rob@xxxxxxxxxxx> writes:

Rob> You can make a file with a hole by seeking past it and never
Rob> writing to that bit, but is there any way to punch a hole in a
Rob> file after the fact?  (I mean other with lseek and write.  Having
Rob> a sparse file as the result....)


SVr4 has fcntl(fd, F_FREESP, flock) that frees the space covered by
the struct flock in the file.  Linux doesn't have this, at least in
the baseline kernels.

--
Dr Peter Chubb  http://www.gelato.unsw.edu.au  peterc AT gelato.unsw.edu.au
The technical we do immediately,  the political takes *forever*
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