Suppose I have a shell or perl script which is running /bioctl/ to create a new softraid device, e.g., which is executing something like
bioctl -c C -r 123456 -l /dev/sd0a softraid0 If everything works correctly, this will create a new softraid crypto disk /sdN/. My question is, what's the best way for my script to find out the newly-created /sdN/ device (so that it can do error-checking, and if all is well, do an appropriate /mount/ command on that device)? The /sdN/ information is printed by the kernel, but that's not readily accessible to my script. I can see two options: * execute /sysctl hw.disknames/ before and after the /bioctl/, parse each of these for the set of disks in use, and see what changed. * execute /dmesg | tail -2/ after the /bioctl/, parse this to check that it shows a new /sdN/ of the appropriate type/, and use that /sdN/ (Either option has a race condition with other system activity, but for my use cases I think I can probably ignore this.) Is there an easier/cleaner way? Thanks, -- -- "Jonathan Thornburg [remove -color to reply]" <[email protected]> (he/him; currently on the west coast of Canada) "Totalitarianism in power invariably replaces all first-rate talents, regardless of their sympathies, with those crackpots and fools whose lack of intelligence and creativity is still the best guarantee of their loyalty." -- Hannah Arendt, "The Origins of Totalitarianism"
