diff --git a/ttar b/ttar
index c3472c1..b0171a1 100755
--- a/ttar
+++ b/ttar
@@ -1,11 +1,26 @@
 #!/usr/bin/env bash
+
 # Purpose: plain text tar format
 # Limitations: - only suitable for text files, directories, and symlinks
 #              - stores only filename, content, and mode
 #              - not designed for untrusted input
-
+#
 # Note: must work with bash version 3.2 (macOS)
 
+# Copyright 2017 Roger Luethi
+#
+# 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.
+
 set -o errexit -o nounset
 
 # Sanitize environment (for instance, standard sorting of glob matches)
@@ -13,7 +28,55 @@ export LC_ALL=C
 
 path=""
 CMD=""
-ARG_STRING="$@"
+ARG_STRING="$*"
+
+#------------------------------------------------------------------------------
+# Not all sed implementations can work on null bytes. In order to make ttar
+# work out of the box on macOS, use Python as a stream editor.
+
+USE_PYTHON=0
+
+PYTHON_CREATE_FILTER=$(cat << 'PCF'
+#!/usr/bin/env python
+
+import re
+import sys
+
+for line in sys.stdin:
+    line = re.sub(r'EOF', r'\EOF', line)
+    line = re.sub(r'NULLBYTE', r'\NULLBYTE', line)
+    line = re.sub('\x00', r'NULLBYTE', line)
+    sys.stdout.write(line)
+PCF
+)
+
+PYTHON_EXTRACT_FILTER=$(cat << 'PEF'
+#!/usr/bin/env python
+
+import re
+import sys
+
+for line in sys.stdin:
+    line = re.sub(r'(?<!\\)NULLBYTE', '\x00', line)
+    line = re.sub(r'\\NULLBYTE', 'NULLBYTE', line)
+    line = re.sub(r'([^\\])EOF', r'\1', line)
+    line = re.sub(r'\\EOF', 'EOF', line)
+    sys.stdout.write(line)
+PEF
+)
+
+function test_environment {
+    if [[ "$(echo "a" | sed 's/a/\x0/' | wc -c)" -ne 2 ]]; then
+        echo "WARNING sed unable to handle null bytes, using Python (slow)."
+        if ! which python >/dev/null; then
+            echo "ERROR Python not found. Aborting."
+            exit 2
+        fi
+        USE_PYTHON=1
+    fi
+}
+
+#------------------------------------------------------------------------------
 
 function usage {
     bname=$(basename "$0")
@@ -24,6 +87,7 @@ Usage:   $bname [-C <DIR>] -c -f <ARCHIVE> <FILE...> (create archive)
 
 Options:
          -C <DIR>                                    (change directory)
+         -v                                          (verbose)
 
 Example: Change to sysfs directory, create ttar file from fixtures directory
          $bname -C sysfs -c -f sysfs/fixtures.ttar fixtures/
@@ -46,6 +110,8 @@ function set_cmd {
     CMD=$1
 }
 
+unset VERBOSE
+
 while getopts :cf:htxvC: opt; do
     case $opt in
         c)
@@ -143,8 +209,37 @@ function extract {
     fi
     while IFS= read -r line; do
         line_no=$(( line_no + 1 ))
+        local eof_without_newline
         if [ "$size" -gt 0 ]; then
-            echo "$line" >> "$path"
+            if [[ "$line" =~ [^\\]EOF ]]; then
+                # An EOF not preceeded by a backslash indicates that the line
+                # does not end with a newline
+                eof_without_newline=1
+            else
+                eof_without_newline=0
+            fi
+            # Replace NULLBYTE with null byte if at beginning of line
+            # Replace NULLBYTE with null byte unless preceeded by backslash
+            # Remove one backslash in front of NULLBYTE (if any)
+            # Remove EOF unless preceeded by backslash
+            # Remove one backslash in front of EOF
+            if [ $USE_PYTHON -eq 1 ]; then
+                echo -n "$line" | python -c "$PYTHON_EXTRACT_FILTER" >> "$path"
+            else
+                # The repeated pattern makes up for sed's lack of negative
+                # lookbehind assertions (for consecutive null bytes).
+                echo -n "$line" | \
+                    sed -e 's/^NULLBYTE/\x0/g;
+                            s/\([^\\]\)NULLBYTE/\1\x0/g;
+                            s/\([^\\]\)NULLBYTE/\1\x0/g;
+                            s/\\NULLBYTE/NULLBYTE/g;
+                            s/\([^\\]\)EOF/\1/g;
+                            s/\\EOF/EOF/g;
+                    ' >> "$path"
+            fi
+            if [[ "$eof_without_newline" -eq 0 ]]; then
+                echo >> "$path"
+            fi
             size=$(( size - 1 ))
             continue
         fi
@@ -188,11 +283,14 @@ function get_mode {
     local mfile=$1
     if [ -z "${STAT_OPTION:-}" ]; then
         if stat -c '%a' "$mfile" >/dev/null 2>&1; then
+            # GNU stat
             STAT_OPTION='-c'
             STAT_FORMAT='%a'
         else
+            # BSD stat
             STAT_OPTION='-f'
-            STAT_FORMAT='%A'
+            # Octal output, user/group/other (omit file type, sticky bit)
+            STAT_FORMAT='%OLp'
         fi
     fi
     stat "${STAT_OPTION}" "${STAT_FORMAT}" "$mfile"
@@ -201,6 +299,7 @@ function get_mode {
 function _create {
     shopt -s nullglob
     local mode
+    local eof_without_newline
     while (( "$#" )); do
         file=$1
         if [ -L "$file" ]; then
@@ -224,8 +323,30 @@ function _create {
         elif [ -f "$file" ]; then
             echo "Path: $file"
             lines=$(wc -l "$file"|awk '{print $1}')
+            eof_without_newline=0
+            if [[ "$(wc -c "$file"|awk '{print $1}')" -gt 0 ]] && \
+                    [[ "$(tail -c 1 "$file" | wc -l)" -eq 0 ]]; then
+                eof_without_newline=1
+                lines=$((lines+1))
+            fi
             echo "Lines: $lines"
-            cat "$file"
+            # Add backslash in front of EOF
+            # Add backslash in front of NULLBYTE
+            # Replace null byte with NULLBYTE
+            if [ $USE_PYTHON -eq 1 ]; then
+                < "$file" python -c "$PYTHON_CREATE_FILTER"
+            else
+                < "$file" \
+                    sed 's/EOF/\\EOF/g;
+                         s/NULLBYTE/\\NULLBYTE/g;
+                         s/\x0/NULLBYTE/g;
+                    '
+            fi
+            if [[ "$eof_without_newline" -eq 1 ]]; then
+                # Finish line with EOF to indicate that the original line did
+                # not end with a linefeed
+                echo "EOF"
+            fi
             mode=$(get_mode "$file")
             echo "Mode: $mode"
             vecho "$mode $file"
@@ -254,6 +375,8 @@ function create {
     _create "$@"
 }
 
+test_environment
+
 if [ -n "${CDIR:-}" ]; then
     if [[ "$ARCHIVE" != /* ]]; then
         # Relative path: preserve the archive's location before changing
diff --git a/vendor/github.com/prometheus/procfs/Makefile b/vendor/github.com/prometheus/procfs/Makefile
index dd48afd..5c8f726 100644
--- a/vendor/github.com/prometheus/procfs/Makefile
+++ b/vendor/github.com/prometheus/procfs/Makefile
@@ -1,18 +1,71 @@
-ci: fmt lint test
+# Copyright 2018 The Prometheus Authors
+# 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.
 
-fmt:
-	! gofmt -l *.go | read nothing
-	go vet
+# Ensure GOBIN is not set during build so that promu is installed to the correct path
+unexport GOBIN
 
-lint:
-	go get github.com/golang/lint/golint
-	golint *.go
+GO           ?= go
+GOFMT        ?= $(GO)fmt
+FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH)))
+STATICCHECK  := $(FIRST_GOPATH)/bin/staticcheck
+pkgs          = $(shell $(GO) list ./... | grep -v /vendor/)
 
-test: sysfs/fixtures/.unpacked
-	go test -v ./...
+PREFIX                  ?= $(shell pwd)
+BIN_DIR                 ?= $(shell pwd)
 
-sysfs/fixtures/.unpacked: sysfs/fixtures.ttar
-	./ttar -C sysfs -x -f sysfs/fixtures.ttar
+ifdef DEBUG
+  bindata_flags = -debug
+endif
+
+STATICCHECK_IGNORE =
+
+all: format staticcheck build test
+
+style:
+	@echo ">> checking code style"
+	@! $(GOFMT) -d $(shell find . -path ./vendor -prune -o -name '*.go' -print) | grep '^'
+
+check_license:
+	@echo ">> checking license header"
+	@./scripts/check_license.sh
+
+test: fixtures/.unpacked sysfs/fixtures/.unpacked
+	@echo ">> running all tests"
+	@$(GO) test -race $(shell $(GO) list ./... | grep -v /vendor/ | grep -v examples)
+
+format:
+	@echo ">> formatting code"
+	@$(GO) fmt $(pkgs)
+
+vet:
+	@echo ">> vetting code"
+	@$(GO) vet $(pkgs)
+
+staticcheck: $(STATICCHECK)
+	@echo ">> running staticcheck"
+	@$(STATICCHECK) -ignore "$(STATICCHECK_IGNORE)" $(pkgs)
+
+%/.unpacked: %.ttar
+	./ttar -C $(dir $*) -x -f $*.ttar
 	touch $@
 
-.PHONY: fmt lint test ci
+$(FIRST_GOPATH)/bin/staticcheck:
+	@GOOS= GOARCH= $(GO) get -u honnef.co/go/tools/cmd/staticcheck
+
+.PHONY: all style check_license format test vet staticcheck
+
+# Declaring the binaries at their default locations as PHONY targets is a hack
+# to ensure the latest version is downloaded on every make execution.
+# If this is not desired, copy/symlink these binaries to a different path and
+# set the respective environment variables.
+.PHONY: $(GOPATH)/bin/staticcheck
diff --git a/vendor/github.com/prometheus/procfs/fixtures.ttar b/vendor/github.com/prometheus/procfs/fixtures.ttar
new file mode 100644
index 0000000..3ee8291
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/fixtures.ttar
@@ -0,0 +1,446 @@
+# Archive created by ttar -c -f fixtures.ttar fixtures/
+Directory: fixtures
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26231
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/cmdline
+Lines: 1
+vimNULLBYTEtest.goNULLBYTE+10NULLBYTEEOF
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/comm
+Lines: 1
+vim
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/exe
+SymlinkTo: /usr/bin/vim
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26231/fd
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/fd/0
+SymlinkTo: ../../symlinktargets/abc
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/fd/1
+SymlinkTo: ../../symlinktargets/def
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/fd/10
+SymlinkTo: ../../symlinktargets/xyz
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/fd/2
+SymlinkTo: ../../symlinktargets/ghi
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/fd/3
+SymlinkTo: ../../symlinktargets/uvw
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/io
+Lines: 7
+rchar: 750339
+wchar: 818609
+syscr: 7405
+syscw: 5245
+read_bytes: 1024
+write_bytes: 2048
+cancelled_write_bytes: -1024
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/limits
+Lines: 17
+Limit                     Soft Limit           Hard Limit           Units
+Max cpu time              unlimited            unlimited            seconds
+Max file size             unlimited            unlimited            bytes
+Max data size             unlimited            unlimited            bytes
+Max stack size            8388608              unlimited            bytes
+Max core file size        0                    unlimited            bytes
+Max resident set          unlimited            unlimited            bytes
+Max processes             62898                62898                processes
+Max open files            2048                 4096                 files
+Max locked memory         65536                65536                bytes
+Max address space         8589934592           unlimited            bytes
+Max file locks            unlimited            unlimited            locks
+Max pending signals       62898                62898                signals
+Max msgqueue size         819200               819200               bytes
+Max nice priority         0                    0
+Max realtime priority     0                    0
+Max realtime timeout      unlimited            unlimited            us
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/mountstats
+Lines: 19
+device rootfs mounted on / with fstype rootfs
+device sysfs mounted on /sys with fstype sysfs
+device proc mounted on /proc with fstype proc
+device /dev/sda1 mounted on / with fstype ext4
+device 192.168.1.1:/srv/test mounted on /mnt/nfs/test with fstype nfs4 statvers=1.1
+	opts:	rw,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,acregmin=3,acregmax=60,acdirmin=30,acdirmax=60,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.5,local_lock=none
+	age:	13968
+	caps:	caps=0xfff7,wtmult=512,dtsize=32768,bsize=0,namlen=255
+	nfsv4:	bm0=0xfdffafff,bm1=0xf9be3e,bm2=0x0,acl=0x0,pnfs=not configured
+	sec:	flavor=1,pseudoflavor=1
+	events:	52 226 0 0 1 13 398 0 0 331 0 47 0 0 77 0 0 77 0 0 0 0 0 0 0 0 0
+	bytes:	1207640230 0 0 0 1210214218 0 295483 0
+	RPC iostats version: 1.0  p/v: 100003/4 (nfs)
+	xprt:	tcp 832 0 1 0 11 6428 6428 0 12154 0 24 26 5726
+	per-op statistics
+	        NULL: 0 0 0 0 0 0 0 0
+	        READ: 1298 1298 0 207680 1210292152 6 79386 79407
+	       WRITE: 0 0 0 0 0 0 0 0
+
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26231/net
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/net/dev
+Lines: 4
+Inter-|   Receive                                                |  Transmit
+ face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
+    lo:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
+  eth0:     438       5    0    0    0     0          0         0      648       8    0    0    0     0       0          0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26231/ns
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/ns/mnt
+SymlinkTo: mnt:[4026531840]
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/ns/net
+SymlinkTo: net:[4026531993]
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26231/stat
+Lines: 1
+26231 (vim) R 5392 7446 5392 34835 7446 4218880 32533 309516 26 82 1677 44 158 99 20 0 1 0 82375 56274944 1981 18446744073709551615 4194304 6294284 140736914091744 140736914087944 139965136429984 0 0 12288 1870679807 0 0 0 17 0 0 0 31 0 0 8391624 8481048 16420864 140736914093252 140736914093279 140736914093279 140736914096107 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26232
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/cmdline
+Lines: 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/comm
+Lines: 1
+ata_sff
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26232/fd
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/fd/0
+SymlinkTo: ../../symlinktargets/abc
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/fd/1
+SymlinkTo: ../../symlinktargets/def
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/fd/2
+SymlinkTo: ../../symlinktargets/ghi
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/fd/3
+SymlinkTo: ../../symlinktargets/uvw
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/fd/4
+SymlinkTo: ../../symlinktargets/xyz
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/limits
+Lines: 17
+Limit                     Soft Limit           Hard Limit           Units     
+Max cpu time              unlimited            unlimited            seconds   
+Max file size             unlimited            unlimited            bytes     
+Max data size             unlimited            unlimited            bytes     
+Max stack size            8388608              unlimited            bytes     
+Max core file size        0                    unlimited            bytes     
+Max resident set          unlimited            unlimited            bytes     
+Max processes             29436                29436                processes 
+Max open files            1024                 4096                 files     
+Max locked memory         65536                65536                bytes     
+Max address space         unlimited            unlimited            bytes     
+Max file locks            unlimited            unlimited            locks     
+Max pending signals       29436                29436                signals   
+Max msgqueue size         819200               819200               bytes     
+Max nice priority         0                    0                    
+Max realtime priority     0                    0                    
+Max realtime timeout      unlimited            unlimited            us        
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26232/stat
+Lines: 1
+33 (ata_sff) S 2 0 0 0 -1 69238880 0 0 0 0 0 0 0 0 0 -20 1 0 5 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 1 0 0 0 0 0 0 0 0 0 0 0 0 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/26233
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/26233/cmdline
+Lines: 1
+com.github.uiautomatorNULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTENULLBYTEEOF
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/584
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/584/stat
+Lines: 2
+1020 ((a b ) ( c d) ) R 28378 1020 28378 34842 1020 4218880 286 0 0 0 0 0 0 0 20 0 1 0 10839175 10395648 155 18446744073709551615 4194304 4238788 140736466511168 140736466511168 140609271124624 0 0 0 0 0 0 0 17 5 0 0 0 0 0 6336016 6337300 25579520 140736466515030 140736466515061 140736466515061 140736466518002 0
+#!/bin/cat /proc/self/stat
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/buddyinfo
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/buddyinfo/short
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/buddyinfo/short/buddyinfo
+Lines: 3
+Node 0, zone
+Node 0, zone
+Node 0, zone
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/buddyinfo/sizemismatch
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/buddyinfo/sizemismatch/buddyinfo
+Lines: 3
+Node 0, zone      DMA      1      0      1      0      2      1      1      0      1      1      3 
+Node 0, zone    DMA32    759    572    791    475    194     45     12      0      0      0      0      0
+Node 0, zone   Normal   4381   1093    185   1530    567    102      4      0      0      0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/buddyinfo/valid
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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+      195310144 blocks [2/1] [U_]
+      [=>...................]  recovery =  8.5% (16775552/195310144) finish=17.0min speed=259783K/sec
+
+md8 : active raid1 sdb1[1] sda1[0]
+      195310144 blocks [2/2] [UU]
+      [=>...................]  resync =  8.5% (16775552/195310144) finish=17.0min speed=259783K/sec
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+Inter-|   Receive                                                |  Transmit
+ face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
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+FWM  10001000 wlc
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+Mode: 755
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+Directory: fixtures/symlinktargets
+Mode: 755
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+Path: fixtures/symlinktargets/README
+Lines: 2
+This directory contains some empty files that are the symlinks the files in the "fd" directory point to.
+They are otherwise ignored by the tests
+Mode: 644
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+Path: fixtures/symlinktargets/abc
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diff --git a/vendor/github.com/prometheus/procfs/fs.go b/vendor/github.com/prometheus/procfs/fs.go
index 65f0922..b6c6b2c 100644
--- a/vendor/github.com/prometheus/procfs/fs.go
+++ b/vendor/github.com/prometheus/procfs/fs.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/ipvs.go b/vendor/github.com/prometheus/procfs/ipvs.go
index 5761b45..e36d4a3 100644
--- a/vendor/github.com/prometheus/procfs/ipvs.go
+++ b/vendor/github.com/prometheus/procfs/ipvs.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/mdstat.go b/vendor/github.com/prometheus/procfs/mdstat.go
index d7a248c..9dc1958 100644
--- a/vendor/github.com/prometheus/procfs/mdstat.go
+++ b/vendor/github.com/prometheus/procfs/mdstat.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/mountstats.go b/vendor/github.com/prometheus/procfs/mountstats.go
index 6b2b0ba..e95ddbc 100644
--- a/vendor/github.com/prometheus/procfs/mountstats.go
+++ b/vendor/github.com/prometheus/procfs/mountstats.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 // While implementing parsing of /proc/[pid]/mountstats, this blog was used
diff --git a/vendor/github.com/prometheus/procfs/net_dev.go b/vendor/github.com/prometheus/procfs/net_dev.go
index f8c184e..6c17aff 100644
--- a/vendor/github.com/prometheus/procfs/net_dev.go
+++ b/vendor/github.com/prometheus/procfs/net_dev.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/proc.go b/vendor/github.com/prometheus/procfs/proc.go
index 8717e1f..7cf5b8a 100644
--- a/vendor/github.com/prometheus/procfs/proc.go
+++ b/vendor/github.com/prometheus/procfs/proc.go
@@ -1,6 +1,20 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
+	"bytes"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -113,7 +127,7 @@ func (p Proc) CmdLine() ([]string, error) {
 		return []string{}, nil
 	}
 
-	return strings.Split(string(data[:len(data)-1]), string(byte(0))), nil
+	return strings.Split(string(bytes.TrimRight(data, string("\x00"))), string(byte(0))), nil
 }
 
 // Comm returns the command name of a process.
diff --git a/vendor/github.com/prometheus/procfs/proc_io.go b/vendor/github.com/prometheus/procfs/proc_io.go
index e7f6674..0251c83 100644
--- a/vendor/github.com/prometheus/procfs/proc_io.go
+++ b/vendor/github.com/prometheus/procfs/proc_io.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/proc_limits.go b/vendor/github.com/prometheus/procfs/proc_limits.go
index b684a5b..f04ba6f 100644
--- a/vendor/github.com/prometheus/procfs/proc_limits.go
+++ b/vendor/github.com/prometheus/procfs/proc_limits.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/proc_ns.go b/vendor/github.com/prometheus/procfs/proc_ns.go
index befdd26..d06c26e 100644
--- a/vendor/github.com/prometheus/procfs/proc_ns.go
+++ b/vendor/github.com/prometheus/procfs/proc_ns.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/proc_stat.go b/vendor/github.com/prometheus/procfs/proc_stat.go
index 724e271..3cf2a9f 100644
--- a/vendor/github.com/prometheus/procfs/proc_stat.go
+++ b/vendor/github.com/prometheus/procfs/proc_stat.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/stat.go b/vendor/github.com/prometheus/procfs/stat.go
index 701f4df..61eb6b0 100644
--- a/vendor/github.com/prometheus/procfs/stat.go
+++ b/vendor/github.com/prometheus/procfs/stat.go
@@ -1,3 +1,16 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
 package procfs
 
 import (
diff --git a/vendor/github.com/prometheus/procfs/sysfs/fixtures.ttar b/vendor/github.com/prometheus/procfs/sysfs/fixtures.ttar
index 0045e7d..8e665ce 100644
--- a/vendor/github.com/prometheus/procfs/sysfs/fixtures.ttar
+++ b/vendor/github.com/prometheus/procfs/sysfs/fixtures.ttar
@@ -1,3 +1,4 @@
+# Archive created by ttar -c -f fixtures.ttar fixtures/
 Directory: fixtures
 Mode: 755
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -719,3 +720,132 @@ Lines: 1
 extent_alloc 2 0 0 0
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/class/net/eth0/
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/addr_assign_type
+Lines: 1
+3
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/addr_len
+Lines: 1
+6
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/address
+Lines: 1
+01:01:01:01:01:01
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/broadcast
+Lines: 1
+ff:ff:ff:ff:ff:ff
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/carrier
+Lines: 1
+1
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/carrier_changes
+Lines: 1
+2
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/carrier_down_count
+Lines: 1
+1
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/carrier_up_count
+Lines: 1
+1
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/dev_id
+Lines: 1
+0x20
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/dormant
+Lines: 1
+1
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/duplex
+Lines: 1
+full
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/flags
+Lines: 1
+0x1303
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/ifalias
+Lines: 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/ifindex
+Lines: 1
+2
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/iflink
+Lines: 1
+2
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/link_mode
+Lines: 1
+1
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/mtu
+Lines: 1
+1500
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/name_assign_type
+Lines: 1
+2
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/netdev_group
+Lines: 1
+0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/operstate
+Lines: 1
+up
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/phys_port_id
+Lines: 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/phys_port_name
+Lines: 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/phys_switch_id
+Lines: 0
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/speed
+Lines: 1
+1000
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/tx_queue_len
+Lines: 1
+1000
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/class/net/eth0/type
+Lines: 1
+1
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\ No newline at end of file
diff --git a/vendor/github.com/prometheus/procfs/sysfs/net_class.go b/vendor/github.com/prometheus/procfs/sysfs/net_class.go
new file mode 100644
index 0000000..46affd7
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/sysfs/net_class.go
@@ -0,0 +1,165 @@
+// Copyright 2018 The Prometheus Authors
+// 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.
+
+package sysfs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"reflect"
+	"strconv"
+	"strings"
+	"syscall"
+)
+
+// NetClassIface contains info from files in /sys/class/net/<iface>
+// for single interface (iface).
+type NetClassIface struct {
+	Name             string // Interface name
+	AddrAssignType   int64  `fileName:"addr_assign_type"`   // /sys/class/net/<iface>/addr_assign_type
+	AddrLen          int64  `fileName:"addr_len"`           // /sys/class/net/<iface>/addr_len
+	Address          string `fileName:"address"`            // /sys/class/net/<iface>/address
+	Broadcast        string `fileName:"broadcast"`          // /sys/class/net/<iface>/broadcast
+	Carrier          int64  `fileName:"carrier"`            // /sys/class/net/<iface>/carrier
+	CarrierChanges   int64  `fileName:"carrier_changes"`    // /sys/class/net/<iface>/carrier_changes
+	CarrierUpCount   int64  `fileName:"carrier_up_count"`   // /sys/class/net/<iface>/carrier_up_count
+	CarrierDownCount int64  `fileName:"carrier_down_count"` // /sys/class/net/<iface>/carrier_down_count
+	DevID            int64  `fileName:"dev_id"`             // /sys/class/net/<iface>/dev_id
+	Dormant          int64  `fileName:"dormant"`            // /sys/class/net/<iface>/dormant
+	Duplex           string `fileName:"duplex"`             // /sys/class/net/<iface>/duplex
+	Flags            int64  `fileName:"flags"`              // /sys/class/net/<iface>/flags
+	IfAlias          string `fileName:"ifalias"`            // /sys/class/net/<iface>/ifalias
+	IfIndex          int64  `fileName:"ifindex"`            // /sys/class/net/<iface>/ifindex
+	IfLink           int64  `fileName:"iflink"`             // /sys/class/net/<iface>/iflink
+	LinkMode         int64  `fileName:"link_mode"`          // /sys/class/net/<iface>/link_mode
+	MTU              int64  `fileName:"mtu"`                // /sys/class/net/<iface>/mtu
+	NameAssignType   int64  `fileName:"name_assign_type"`   // /sys/class/net/<iface>/name_assign_type
+	NetDevGroup      int64  `fileName:"netdev_group"`       // /sys/class/net/<iface>/netdev_group
+	OperState        string `fileName:"operstate"`          // /sys/class/net/<iface>/operstate
+	PhysPortID       string `fileName:"phys_port_id"`       // /sys/class/net/<iface>/phys_port_id
+	PhysPortName     string `fileName:"phys_port_name"`     // /sys/class/net/<iface>/phys_port_name
+	PhysSwitchID     string `fileName:"phys_switch_id"`     // /sys/class/net/<iface>/phys_switch_id
+	Speed            int64  `fileName:"speed"`              // /sys/class/net/<iface>/speed
+	TxQueueLen       int64  `fileName:"tx_queue_len"`       // /sys/class/net/<iface>/tx_queue_len
+	Type             int64  `fileName:"type"`               // /sys/class/net/<iface>/type
+}
+
+// NetClass is collection of info for every interface (iface) in /sys/class/net. The map keys
+// are interface (iface) names.
+type NetClass map[string]NetClassIface
+
+// NewNetClass returns info for all net interfaces (iface) read from /sys/class/net/<iface>.
+func NewNetClass() (NetClass, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return nil, err
+	}
+
+	return fs.NewNetClass()
+}
+
+// NewNetClass returns info for all net interfaces (iface) read from /sys/class/net/<iface>.
+func (fs FS) NewNetClass() (NetClass, error) {
+	path := fs.Path("class/net")
+
+	devices, err := ioutil.ReadDir(path)
+	if err != nil {
+		return NetClass{}, fmt.Errorf("cannot access %s dir %s", path, err)
+	}
+
+	netClass := NetClass{}
+	for _, deviceDir := range devices {
+		interfaceClass, err := netClass.parseNetClassIface(path + "/" + deviceDir.Name())
+		if err != nil {
+			return nil, err
+		}
+		interfaceClass.Name = deviceDir.Name()
+		netClass[deviceDir.Name()] = *interfaceClass
+	}
+	return netClass, nil
+}
+
+// parseNetClassIface scans predefined files in /sys/class/net/<iface>
+// directory and gets their contents.
+func (nc NetClass) parseNetClassIface(devicePath string) (*NetClassIface, error) {
+	interfaceClass := NetClassIface{}
+	interfaceElem := reflect.ValueOf(&interfaceClass).Elem()
+	interfaceType := reflect.TypeOf(interfaceClass)
+
+	//start from 1 - skip the Name field
+	for i := 1; i < interfaceElem.NumField(); i++ {
+		fieldType := interfaceType.Field(i)
+		fieldValue := interfaceElem.Field(i)
+
+		if fieldType.Tag.Get("fileName") == "" {
+			panic(fmt.Errorf("field %s does not have a filename tag", fieldType.Name))
+		}
+
+		fileContents, err := sysReadFile(devicePath + "/" + fieldType.Tag.Get("fileName"))
+
+		if err != nil {
+			if os.IsNotExist(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
+				continue
+			}
+			return nil, fmt.Errorf("could not access file %s: %s", fieldType.Tag.Get("fileName"), err)
+		}
+		value := strings.TrimSpace(string(fileContents))
+
+		switch fieldValue.Kind() {
+		case reflect.Int64:
+			if strings.HasPrefix(value, "0x") {
+				intValue, err := strconv.ParseInt(value[2:], 16, 64)
+				if err != nil {
+					return nil, fmt.Errorf("expected hex value for %s, got: %s", fieldType.Name, value)
+				}
+				fieldValue.SetInt(intValue)
+			} else {
+				intValue, err := strconv.ParseInt(value, 10, 64)
+				if err != nil {
+					return nil, fmt.Errorf("expected Uint64 value for %s, got: %s", fieldType.Name, value)
+				}
+				fieldValue.SetInt(intValue)
+			}
+		case reflect.String:
+			fieldValue.SetString(value)
+		default:
+			return nil, fmt.Errorf("unhandled type %q", fieldValue.Kind())
+		}
+	}
+
+	return &interfaceClass, nil
+}
+
+// sysReadFile is a simplified ioutil.ReadFile that invokes syscall.Read directly.
+// https://github.com/prometheus/node_exporter/pull/728/files
+func sysReadFile(file string) ([]byte, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	// On some machines, hwmon drivers are broken and return EAGAIN.  This causes
+	// Go's ioutil.ReadFile implementation to poll forever.
+	//
+	// Since we either want to read data or bail immediately, do the simplest
+	// possible read using syscall directly.
+	b := make([]byte, 128)
+	n, err := syscall.Read(int(f.Fd()), b)
+	if err != nil {
+		return nil, err
+	}
+
+	return b[:n], nil
+}
diff --git a/vendor/github.com/prometheus/procfs/ttar b/vendor/github.com/prometheus/procfs/ttar
index 8227a4a..b0171a1 100755
--- a/vendor/github.com/prometheus/procfs/ttar
+++ b/vendor/github.com/prometheus/procfs/ttar
@@ -1,11 +1,26 @@
 #!/usr/bin/env bash
+
 # Purpose: plain text tar format
 # Limitations: - only suitable for text files, directories, and symlinks
 #              - stores only filename, content, and mode
 #              - not designed for untrusted input
-
+#
 # Note: must work with bash version 3.2 (macOS)
 
+# Copyright 2017 Roger Luethi
+#
+# 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.
+
 set -o errexit -o nounset
 
 # Sanitize environment (for instance, standard sorting of glob matches)
@@ -13,6 +28,55 @@ export LC_ALL=C
 
 path=""
 CMD=""
+ARG_STRING="$*"
+
+#------------------------------------------------------------------------------
+# Not all sed implementations can work on null bytes. In order to make ttar
+# work out of the box on macOS, use Python as a stream editor.
+
+USE_PYTHON=0
+
+PYTHON_CREATE_FILTER=$(cat << 'PCF'
+#!/usr/bin/env python
+
+import re
+import sys
+
+for line in sys.stdin:
+    line = re.sub(r'EOF', r'\EOF', line)
+    line = re.sub(r'NULLBYTE', r'\NULLBYTE', line)
+    line = re.sub('\x00', r'NULLBYTE', line)
+    sys.stdout.write(line)
+PCF
+)
+
+PYTHON_EXTRACT_FILTER=$(cat << 'PEF'
+#!/usr/bin/env python
+
+import re
+import sys
+
+for line in sys.stdin:
+    line = re.sub(r'(?<!\\)NULLBYTE', '\x00', line)
+    line = re.sub(r'\\NULLBYTE', 'NULLBYTE', line)
+    line = re.sub(r'([^\\])EOF', r'\1', line)
+    line = re.sub(r'\\EOF', 'EOF', line)
+    sys.stdout.write(line)
+PEF
+)
+
+function test_environment {
+    if [[ "$(echo "a" | sed 's/a/\x0/' | wc -c)" -ne 2 ]]; then
+        echo "WARNING sed unable to handle null bytes, using Python (slow)."
+        if ! which python >/dev/null; then
+            echo "ERROR Python not found. Aborting."
+            exit 2
+        fi
+        USE_PYTHON=1
+    fi
+}
+
+#------------------------------------------------------------------------------
 
 function usage {
     bname=$(basename "$0")
@@ -23,6 +87,7 @@ Usage:   $bname [-C <DIR>] -c -f <ARCHIVE> <FILE...> (create archive)
 
 Options:
          -C <DIR>                                    (change directory)
+         -v                                          (verbose)
 
 Example: Change to sysfs directory, create ttar file from fixtures directory
          $bname -C sysfs -c -f sysfs/fixtures.ttar fixtures/
@@ -45,6 +110,8 @@ function set_cmd {
     CMD=$1
 }
 
+unset VERBOSE
+
 while getopts :cf:htxvC: opt; do
     case $opt in
         c)
@@ -142,8 +209,37 @@ function extract {
     fi
     while IFS= read -r line; do
         line_no=$(( line_no + 1 ))
+        local eof_without_newline
         if [ "$size" -gt 0 ]; then
-            echo "$line" >> "$path"
+            if [[ "$line" =~ [^\\]EOF ]]; then
+                # An EOF not preceeded by a backslash indicates that the line
+                # does not end with a newline
+                eof_without_newline=1
+            else
+                eof_without_newline=0
+            fi
+            # Replace NULLBYTE with null byte if at beginning of line
+            # Replace NULLBYTE with null byte unless preceeded by backslash
+            # Remove one backslash in front of NULLBYTE (if any)
+            # Remove EOF unless preceeded by backslash
+            # Remove one backslash in front of EOF
+            if [ $USE_PYTHON -eq 1 ]; then
+                echo -n "$line" | python -c "$PYTHON_EXTRACT_FILTER" >> "$path"
+            else
+                # The repeated pattern makes up for sed's lack of negative
+                # lookbehind assertions (for consecutive null bytes).
+                echo -n "$line" | \
+                    sed -e 's/^NULLBYTE/\x0/g;
+                            s/\([^\\]\)NULLBYTE/\1\x0/g;
+                            s/\([^\\]\)NULLBYTE/\1\x0/g;
+                            s/\\NULLBYTE/NULLBYTE/g;
+                            s/\([^\\]\)EOF/\1/g;
+                            s/\\EOF/EOF/g;
+                    ' >> "$path"
+            fi
+            if [[ "$eof_without_newline" -eq 0 ]]; then
+                echo >> "$path"
+            fi
             size=$(( size - 1 ))
             continue
         fi
@@ -187,11 +283,14 @@ function get_mode {
     local mfile=$1
     if [ -z "${STAT_OPTION:-}" ]; then
         if stat -c '%a' "$mfile" >/dev/null 2>&1; then
+            # GNU stat
             STAT_OPTION='-c'
             STAT_FORMAT='%a'
         else
+            # BSD stat
             STAT_OPTION='-f'
-            STAT_FORMAT='%A'
+            # Octal output, user/group/other (omit file type, sticky bit)
+            STAT_FORMAT='%OLp'
         fi
     fi
     stat "${STAT_OPTION}" "${STAT_FORMAT}" "$mfile"
@@ -200,6 +299,7 @@ function get_mode {
 function _create {
     shopt -s nullglob
     local mode
+    local eof_without_newline
     while (( "$#" )); do
         file=$1
         if [ -L "$file" ]; then
@@ -223,8 +323,30 @@ function _create {
         elif [ -f "$file" ]; then
             echo "Path: $file"
             lines=$(wc -l "$file"|awk '{print $1}')
+            eof_without_newline=0
+            if [[ "$(wc -c "$file"|awk '{print $1}')" -gt 0 ]] && \
+                    [[ "$(tail -c 1 "$file" | wc -l)" -eq 0 ]]; then
+                eof_without_newline=1
+                lines=$((lines+1))
+            fi
             echo "Lines: $lines"
-            cat "$file"
+            # Add backslash in front of EOF
+            # Add backslash in front of NULLBYTE
+            # Replace null byte with NULLBYTE
+            if [ $USE_PYTHON -eq 1 ]; then
+                < "$file" python -c "$PYTHON_CREATE_FILTER"
+            else
+                < "$file" \
+                    sed 's/EOF/\\EOF/g;
+                         s/NULLBYTE/\\NULLBYTE/g;
+                         s/\x0/NULLBYTE/g;
+                    '
+            fi
+            if [[ "$eof_without_newline" -eq 1 ]]; then
+                # Finish line with EOF to indicate that the original line did
+                # not end with a linefeed
+                echo "EOF"
+            fi
             mode=$(get_mode "$file")
             echo "Mode: $mode"
             vecho "$mode $file"
@@ -249,9 +371,12 @@ function create {
         rm "$ttar_file"
     fi
     exec > "$ttar_file"
+    echo "# Archive created by ttar $ARG_STRING"
     _create "$@"
 }
 
+test_environment
+
 if [ -n "${CDIR:-}" ]; then
     if [[ "$ARCHIVE" != /* ]]; then
         # Relative path: preserve the archive's location before changing
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 7ef8fab..3d8eec0 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -163,40 +163,40 @@
 			"revisionTime": "2018-01-10T21:49:58Z"
 		},
 		{
-			"checksumSHA1": "Qvc01kv3ttHV2P2+J68g9ioU4Qs=",
+			"checksumSHA1": "Etvt6mgzvD7ARf4Ux03LHfgSlzU=",
 			"path": "github.com/prometheus/procfs",
-			"revision": "282c8707aa210456a825798969cc27edda34992a",
-			"revisionTime": "2018-02-12T14:59:26Z"
+			"revision": "54d17b57dd7d4a3aa092476596b3f8a933bde349",
+			"revisionTime": "2018-03-10T14:15:09Z"
 		},
 		{
 			"checksumSHA1": "O64FotgWPYIpl3m2gvTEPIem+xg=",
 			"path": "github.com/prometheus/procfs/bcache",
-			"revision": "282c8707aa210456a825798969cc27edda34992a",
-			"revisionTime": "2018-02-12T14:59:26Z"
+			"revision": "54d17b57dd7d4a3aa092476596b3f8a933bde349",
+			"revisionTime": "2018-03-10T14:15:09Z"
 		},
 		{
 			"checksumSHA1": "lv9rIcjbVEGo8AT1UCUZXhXrfQc=",
 			"path": "github.com/prometheus/procfs/internal/util",
-			"revision": "282c8707aa210456a825798969cc27edda34992a",
-			"revisionTime": "2018-02-12T14:59:26Z"
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