/usr/lib/ruby/vendor_ruby/ohai/plugins/linux/filesystem.rb is in ohai 8.4.0-1.
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:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 Opscode, 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(:Filesystem) do
provides "filesystem"
def get_blk_cmd(attr, have_lsblk)
if have_lsblk
attr = 'FSTYPE' if attr == 'TYPE'
"lsblk -r -n -o NAME,#{attr}"
else
"blkid -s #{attr}"
end
end
def get_blk_regex(attr, have_lsblk)
have_lsblk ? /^(\S+) (\S+)/ : /^(\S+): #{attr}="(\S+)"/
end
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
collect_data(:linux) do
fs = Mash.new
have_lsblk = File.executable?('/bin/lsblk')
# Grab filesystem data from df
so = shell_out("df -P")
so.stdout.lines do |line|
case line
when /^Filesystem\s+1024-blocks/
next
when /^(.+?)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+\%)\s+(.+)$/
filesystem = $1
fs[filesystem] = Mash.new
fs[filesystem][:kb_size] = $2
fs[filesystem][:kb_used] = $3
fs[filesystem][:kb_available] = $4
fs[filesystem][:percent_used] = $5
fs[filesystem][:mount] = $6
end
end
# Grab filesystem inode data from df
so = shell_out("df -iP")
so.stdout.lines do |line|
case line
when /^Filesystem\s+Inodes/
next
when /^(.+?)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+\%)\s+(.+)$/
filesystem = $1
fs[filesystem] ||= Mash.new
fs[filesystem][:total_inodes] = $2
fs[filesystem][:inodes_used] = $3
fs[filesystem][:inodes_available] = $4
fs[filesystem][:inodes_percent_used] = $5
fs[filesystem][:mount] = $6
end
end
# Grab mount information from /bin/mount
so = shell_out("mount")
so.stdout.lines do |line|
if line =~ /^(.+?) on (.+?) type (.+?) \((.+?)\)$/
filesystem = $1
fs[filesystem] = Mash.new unless fs.has_key?(filesystem)
fs[filesystem][:mount] = $2
fs[filesystem][:fs_type] = $3
fs[filesystem][:mount_options] = $4.split(",")
end
end
have_lsblk = File.exist?('/bin/lsblk')
# Gather more filesystem types via libuuid, even devices that's aren't mounted
cmd = get_blk_cmd('TYPE', have_lsblk)
regex = get_blk_regex('TYPE', have_lsblk)
so = shell_out(cmd)
so.stdout.lines do |line|
if line =~ regex
filesystem = $1
type = $2
filesystem = find_device(filesystem) unless filesystem.start_with?('/')
fs[filesystem] = Mash.new unless fs.has_key?(filesystem)
fs[filesystem][:fs_type] = type
end
end
# Gather device UUIDs via libuuid
cmd = get_blk_cmd('UUID', have_lsblk)
regex = get_blk_regex('UUID', have_lsblk)
so = shell_out(cmd)
so.stdout.lines do |line|
if line =~ regex
filesystem = $1
uuid = $2
filesystem = find_device(filesystem) unless filesystem.start_with?('/')
fs[filesystem] = Mash.new unless fs.has_key?(filesystem)
fs[filesystem][:uuid] = uuid
end
end
# Gather device labels via libuuid
cmd = get_blk_cmd('LABEL', have_lsblk)
regex = get_blk_regex('LABEL', have_lsblk)
so = shell_out(cmd)
so.stdout.lines do |line|
if line =~ regex
filesystem = $1
label = $2
filesystem = find_device(filesystem) unless filesystem.start_with?('/')
fs[filesystem] = Mash.new unless fs.has_key?(filesystem)
fs[filesystem][:label] = label
end
end
# Grab any missing mount information from /proc/mounts
if File.exist?('/proc/mounts')
mounts = ''
# Due to https://tickets.opscode.com/browse/OHAI-196
# we have to non-block read dev files. Ew.
f = File.open('/proc/mounts')
loop do
begin
data = f.read_nonblock(4096)
mounts << data
# We should just catch EOFError, but the kernel had a period of
# bugginess with reading virtual files, so we're being extra
# cautious here, catching all exceptions, and then we'll read
# whatever data we might have
rescue Exception
break
end
end
f.close
mounts.each_line do |line|
if line =~ /^(\S+) (\S+) (\S+) (\S+) \S+ \S+$/
filesystem = $1
next if fs.has_key?(filesystem)
fs[filesystem] = Mash.new
fs[filesystem][:mount] = $2
fs[filesystem][:fs_type] = $3
fs[filesystem][:mount_options] = $4.split(",")
end
end
end
# Set the filesystem data
filesystem fs
end
end
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