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# In some steps below we allow some slack when verifying that the date
# was set appropriately because it may take time to send the `date`
# command over the remote shell and get the answer back, parsing and
# post-processing of the result, etc.
def max_time_drift
10
end
When /^I set the system time to "([^"]+)"$/ do |time|
$vm.execute_successfully("date -s '#{time}'")
new_time = DateTime.parse($vm.execute_successfully("date").stdout).to_time
expected_time_lower_bound = DateTime.parse(time).to_time
expected_time_upper_bound = expected_time_lower_bound + max_time_drift
assert(expected_time_lower_bound <= new_time &&
new_time <= expected_time_upper_bound,
"The guest's time was supposed to be set to " \
"'#{expected_time_lower_bound}' but is '#{new_time}'")
end
When /^I bump the (hardware clock's|system) time with "([^"]+)"$/ do |clock_type, timediff|
case clock_type
when "hardware clock's"
old_time = DateTime.parse($vm.execute_successfully("hwclock -r").stdout).to_time
$vm.execute_successfully("hwclock --set --date 'now #{timediff}'")
new_time = DateTime.parse($vm.execute_successfully("hwclock -r").stdout).to_time
when 'system'
old_time = DateTime.parse($vm.execute_successfully("date").stdout).to_time
$vm.execute_successfully("date -s 'now #{timediff}'")
new_time = DateTime.parse($vm.execute_successfully("date").stdout).to_time
end
expected_time_lower_bound = DateTime.parse(
cmd_helper(["date", "-d", "#{old_time} #{timediff}"])).to_time
expected_time_upper_bound = expected_time_lower_bound + max_time_drift
assert(expected_time_lower_bound <= new_time &&
new_time <= expected_time_upper_bound,
"The #{clock_type} time was supposed to be bumped to " \
"'#{expected_time_lower_bound}' but is '#{new_time}'")
end
Then /^Tails clock is less than (\d+) minutes incorrect$/ do |max_diff_mins|
guest_time_str = $vm.execute("date --rfc-2822").stdout.chomp
guest_time = Time.rfc2822(guest_time_str)
host_time = Time.now
diff = (host_time - guest_time).abs
assert(diff < max_diff_mins.to_i*60,
"The guest's clock is off by #{diff} seconds (#{guest_time})")
puts "Time was #{diff} seconds off"
end
Then /^the system clock is just past Tails' source date$/ do
system_time_str = $vm.execute_successfully('date').to_s
system_time = DateTime.parse(system_time_str).to_time
source_time_cmd = 'sed -n -e "1s/^.* - \([0-9]\+\)$/\1/p;q" ' +
'/etc/amnesia/version'
source_time_str = $vm.execute_successfully(source_time_cmd).to_s
source_time = DateTime.parse(source_time_str).to_time
diff = system_time - source_time # => in seconds
# Half an hour should be enough to boot Tails on any reasonable
# hardware and VM setup.
max_diff = 30*60
assert(diff > 0,
"The system time (#{system_time}) is before the Tails " +
"source date (#{source_time})")
assert(diff <= max_diff,
"The system time (#{system_time}) is more than #{max_diff} seconds " +
"past the source date (#{source_time})")
end
Then /^Tails' hardware clock is close to the host system's time$/ do
host_time = Time.now
hwclock_time_str = $vm.execute('hwclock -r').stdout.chomp
hwclock_time = DateTime.parse(hwclock_time_str).to_time
diff = (hwclock_time - host_time).abs
assert(diff <= max_time_drift)
end
Then /^the hardware clock is still off by "([^"]+)"$/ do |timediff|
hwclock = DateTime.parse($vm.execute_successfully("hwclock -r").stdout.chomp).to_time
expected_time_lower_bound = DateTime.parse(
cmd_helper(["date", "-d", "now #{timediff}"])).to_time - max_time_drift
expected_time_upper_bound = expected_time_lower_bound + max_time_drift
assert(expected_time_lower_bound <= hwclock &&
hwclock <= expected_time_upper_bound,
"The host's hwclock should be approximately " \
"'#{expected_time_lower_bound}' but is actually '#{hwclock}'")
end
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