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Versions: 5
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Contents
module LinuxStat
module Swap
class << self
# List all swap devices
def list
file = IO.readlines('/proc/swaps').drop(1)
file.reduce({}) do |h, x|
name, *stats = x.strip.split
h.merge!(name => stats.map! { |v| v.to_i.to_s == v ? v.to_i : v.to_sym })
end
end
# Show aggregated used and available swap
def stat
values_t = read_usage
total, used = values_t[0].sum, values_t[-1].sum
available = total - used
percent_used = total == 0 ? 0.0 : used.*(100).fdiv(total).round(2)
percent_available = total == 0.0 ? 0 : available.*(100).fdiv(total).round(2)
# We have all the methods, but each methods reads the same file
{
total: total,
used: used,
available: available,
percent_used: percent_used,
percent_available: percent_available
}
end
def total
read_usage[0].sum
end
def available
values_t = read_usage
values_t[0].sum - values_t[1].sum
end
def used
read_usage[-1].sum
end
def percent_used
values_t = read_usage
total = values_t[0].sum
return 0.0 if total == 0
values_t[-1].sum.*(100).fdiv(total).round(2)
end
def percent_available
values_t = read_usage
total = values_t[0].sum
return 0.0 if total == 0
total.-(values_t[-1].sum).*(100).fdiv(total).round(2)
end
private
def read_usage
return [[], []] unless swaps_readable?
IO.readlines('/proc/swaps').drop(1).map { |x|
x.strip.split.values_at(2, 3).map!(&:to_i)
}.transpose
end
def swaps_readable?
@@swaps_readable ||= File.readable?('/proc/swaps')
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems