Adding -N volume name to ubi utils
richard_titmuss at logitech.com
Mon Nov 24 12:07:53 EST 2008
I am trying to modify the ubi tools in mtd_utils to allow the ubi volume
name to be specified on the command line, the relevant commands are
ubinfo, ubirmvol and ubiupdatevol. The idea is that you could use any of
the following command arguments to specify a ubi volume:
ubirmvol /dev/ubi0 -N rootfs # ubi device node and volume name
ubirmvol /dev/ubi0 -n 1 # ubi device node and volume id
ubirmvol /dev/ubi0_1 # ubi volume node
Other than consistency the main feature this adds is support for using
-N to specify the volume by name to all the commands.
The problem is these commands need different information to work:
- ubinfo loads information from the /sys file system, it's easy to
support for all the above command arguments.
- ubirmvol needs a ubi device node and a volume id, how can this work if
a volume node is specified?
- ubiupdatevol needs a ubi volume node, how can this work if a device
node is specified?
So my questions is how can the appropriate device node be generated by
these commands if it is not specified on the command line. It would be
possible to use something like:
sprintf(node, "/dev/ubi%d_%d", args.devn, args.vol_id);
However I don't think that hard coding the /dev path is an acceptable
solution, and assume that's why the -d (device number) argument was
deprecated. Does anyone have any suggestions on a better solution?
More information about the linux-mtd