/usr/lib/ruby/vendor_ruby/ohai/plugins/linux/filesystem2.rb is in ohai 8.21.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Author:: Phil Dibowitz <phil@ipom.com>
# Author:: Adam Jacob <adam@chef.io>
# Copyright:: Copyright (c) 2008-2016 Chef Software, Inc.
# Copyright:: Copyright (c) 2015 Facebook, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
Ohai.plugin(:Filesystem2) do
provides "filesystem2"
def find_device(name)
%w{/dev /dev/mapper}.each do |dir|
path = File.join(dir, name)
return path if File.exist?(path)
end
name
end
def parse_line(line, have_lsblk)
if have_lsblk
regex = /NAME="(\S+).*?" UUID="(\S*)" LABEL="(\S*)" FSTYPE="(\S*)"/
if line =~ regex
dev = $1
dev = find_device(dev) unless dev.start_with?("/")
uuid = $2
label = $3
fs_type = $4
return { :dev => dev, :uuid => uuid, :label => label, :fs_type => fs_type }
end
else
bits = line.split
dev = bits.shift.split(":")[0]
f = { :dev => dev }
bits.each do |keyval|
if keyval =~ /(\S+)="(\S+)"/
key = $1.downcase.to_sym
key = :fs_type if key == :type
f[key] = $2
end
end
return f
end
return nil
end
def generate_device_view(fs)
view = {}
fs.each_value do |entry|
view[entry[:device]] = Mash.new unless view[entry[:device]]
entry.each do |key, val|
next if %w{device mount}.include?(key)
view[entry[:device]][key] = val
end
view[entry[:device]][:mounts] ||= []
if entry[:mount]
view[entry[:device]][:mounts] << entry[:mount]
end
end
view
end
def generate_mountpoint_view(fs)
view = {}
fs.each_value do |entry|
next unless entry[:mount]
view[entry[:mount]] = Mash.new unless view[entry[:mount]]
entry.each do |key, val|
next if %w{mount device}.include?(key)
view[entry[:mount]][key] = val
end
view[entry[:mount]][:devices] ||= []
if entry[:device]
view[entry[:mount]][:devices] << entry[:device]
end
end
view
end
collect_data(:linux) do
fs = Mash.new
# Grab filesystem data from df
so = shell_out("df -P")
so.stdout.each_line do |line|
case line
when /^Filesystem\s+1024-blocks/
next
when /^(.+?)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+\%)\s+(.+)$/
key = "#{$1},#{$6}"
fs[key] = Mash.new
fs[key][:device] = $1
fs[key][:kb_size] = $2
fs[key][:kb_used] = $3
fs[key][:kb_available] = $4
fs[key][:percent_used] = $5
fs[key][:mount] = $6
end
end
# Grab filesystem inode data from df
so = shell_out("df -iP")
so.stdout.each_line do |line|
case line
when /^Filesystem\s+Inodes/
next
when /^(.+?)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+\%)\s+(.+)$/
key = "#{$1},#{$6}"
fs[key] ||= Mash.new
fs[key][:device] = $1
fs[key][:total_inodes] = $2
fs[key][:inodes_used] = $3
fs[key][:inodes_available] = $4
fs[key][:inodes_percent_used] = $5
fs[key][:mount] = $6
end
end
# Grab mount information from /bin/mount
so = shell_out("mount")
so.stdout.each_line do |line|
if line =~ /^(.+?) on (.+?) type (.+?) \((.+?)\)$/
key = "#{$1},#{$2}"
fs[key] = Mash.new unless fs.has_key?(key)
fs[key][:device] = $1
fs[key][:mount] = $2
fs[key][:fs_type] = $3
fs[key][:mount_options] = $4.split(",")
end
end
have_lsblk = File.exist?("/bin/lsblk")
if have_lsblk
cmd = "lsblk -n -P -o NAME,UUID,LABEL,FSTYPE"
else
# CentOS5 and other platforms don't have lsblk
cmd = "blkid"
end
so = shell_out(cmd)
so.stdout.each_line do |line|
parsed = parse_line(line, have_lsblk)
next if parsed.nil?
# lsblk lists each device once, so we need to update all entries
# in the hash that are related to this device
keys_to_update = []
fs.each_key do |key|
keys_to_update << key if key.start_with?("#{parsed[:dev]},")
end
if keys_to_update.empty?
key = "#{parsed[:dev]},"
fs[key] = Mash.new
fs[key][:device] = parsed[:dev]
keys_to_update << key
end
keys_to_update.each do |key|
[:fs_type, :uuid, :label].each do |subkey|
if parsed[subkey] && !parsed[subkey].empty?
fs[key][subkey] = parsed[subkey]
end
end
end
end
# Grab any missing mount information from /proc/mounts
if File.exist?("/proc/mounts")
mounts = ""
# Due to https://tickets.opscode.com/browse/OHAI-196
# we have to non-block read dev files. Ew.
f = File.open("/proc/mounts")
loop do
begin
data = f.read_nonblock(4096)
mounts << data
# We should just catch EOFError, but the kernel had a period of
# bugginess with reading virtual files, so we're being extra
# cautious here, catching all exceptions, and then we'll read
# whatever data we might have
rescue Exception
break
end
end
f.close
mounts.each_line do |line|
if line =~ /^(\S+) (\S+) (\S+) (\S+) \S+ \S+$/
key = "#{$1},#{$2}"
next if fs.has_key?(key)
fs[key] = Mash.new
fs[key][:device] = $1
fs[key][:mount] = $2
fs[key][:fs_type] = $3
fs[key][:mount_options] = $4.split(",")
end
end
end
by_pair = fs
by_device = generate_device_view(fs)
by_mountpoint = generate_mountpoint_view(fs)
fs2 = Mash.new
fs2["by_device"] = by_device
fs2["by_mountpoint"] = by_mountpoint
fs2["by_pair"] = by_pair
# Set the filesystem data
filesystem2 fs2
end
end
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