62143d26b4
On Ubuntu 14.04, the lsblk doesn't have '-p' option, but
`scylla_setup` try to get block list by `lsblk -pnr` and
trigger error.
Current simple pattern will match all help content, it might
match wrong options.
scylla-test@amos-ubuntu-1404:~$ lsblk --help | grep -e -p
-m, --perms output info about permissions
-P, --pairs use key="value" output format
Let's use strict pattern to only match option at the head. Example:
scylla-test@amos-ubuntu-1404:~$ lsblk --help | grep -e '^\s*-D'
-D, --discard print discard capabilities
Signed-off-by: Amos Kong <amos@scylladb.com>
Message-Id: <4f0f318353a43664e27da8a66855f5831457f061.1489712867.git.amos@scylladb.com>
(cherry picked from commit 468df7dd5f)