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

Peter Chubb
2003-12-04T22:54:32Z

>>>>> "Rob" == Rob Landley <rob@landley.net> 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*