open fun rxMkdirs(path: String): Single<Void>
Create the directory represented by path and any non existent parents, asynchronously.
The operation will fail if the directory already exists.
Return
open fun rxMkdirs(path: String, perms: String): Single<Void>
Create the directory represented by path and any non existent parents, asynchronously.
The new directory will be created with permissions as specified by perms.
The permission String takes the form rwxr-x--- as specified in here.
The operation will fail if the directory already exists.
perms - the permissions string
Return