On Tue, Aug 21, 2018 at 10:49:28AM +0200, Marc Hartmayer wrote:
Truncate means that if a file exists it's length will be truncated to 0, but the mode and the owner shall be unchanged. The current behavior is that the original file is deleted and a new file is created. Let's fix this by using O_TRUNC.
This is just describing what you've changed, leaving out why you are trying todo this ?
The function virRotatingFileWriterDelete is now unused but may be used in the future and is therefore still defined.
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com> --- Note:
This change has the (potentially unwanted) security effect that the owner/group of the log file does not change. Before this patch the old log file was deleted and the newly created log file was owned by the virtlogd user. Now, if a user has created the log file before, he can read the logs. If we don't wanna have this effect we can either adjust/add a virtlogd API or do a chown within the calling driver (e.g. QEMU driver).
Pre-creating the log file and/or messing around with ownership are not things we ever intended to support. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|