Replace the assertion check with graceful failure when the socket path
is too long. Programs should not crash on invalid input. Print an
error message and exit properly.
Cc: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>