On a CentOS6 system I have
/dev/block/sr0 (read only) and
/dev/block/sda (read/write). How can I find out programmatically which devices are read-only? There is a
ro file in there, but it's '0' for both devices.
There are some hacks I could use (compare names
^sd, look for
cdrom ownership of device node), but I'd like to have a generic solution.