fallocate64

preallocate a file in the guest filesystem

This command preallocates a file (containing zero bytes) named path of size len bytes. If the file exists already, it is overwritten.

Note that this call allocates disk blocks for the file. To create a sparse file use truncate_size instead.

The deprecated call fallocate does the same, but owing to an oversight it only allowed 30 bit lengths to be specified, effectively limiting the maximum size of files created through that call to 1GB.

Do not confuse this with the guestfish-specific alloc and sparse commands which create a file in the host and attach it as a device.

Parameters:

this	A GuestfsSession object

Returns:

true on success, false on error