bump 0.34

Merge pull request #417 from PartialVolume/Fix_zero_length_strings
Fixes a compiler warning -Wformat-zero-length string
2026-02-21 22:42:29 +00:00 · 2022-07-08 13:18:18 +02:00 · 2022-07-02 19:52:22 +01:00 · 2022-07-02 19:43:56 +01:00 · 2022-05-29 17:01:45 +01:00 · 2022-05-29 11:15:33 +01:00
31 changed files with 2024 additions and 589 deletions
--- a/.clang-format
+++ b/.clang-format
@@ -77,4 +77,3 @@ Standard:        Cpp11
 TabWidth:        4
 UseTab:          Never
 ...
-
--- a/.codespellrc
+++ b/.codespellrc
@@ -0,0 +1,2 @@
+[codespell]
+skip = ./.git
--- a/.github/workflows/ci_ubuntu_18.04.yml
+++ b/.github/workflows/ci_ubuntu_18.04.yml
@@ -1,11 +1,11 @@
-name: ci_ubuntu_16.04
+name: ci_ubuntu_18.04

 on: [push, pull_request]

 jobs:
  build:

-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04

    steps:
    - uses: actions/checkout@v1
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,52 @@
 RELEASE NOTES
 =============

+v0.34
+-----------------------
+- Fix a compiler warning -Wformat-zero-length string 
+
+
+v0.33
+-----------------------
+- Fixes a slight screen corruption on 80 column display. When highlighting the verify ones option the first two digits of DoD 5220.20-M disappear. This patch fixes that issue.@PartialVolume #348 
+- For some controllers/drivers the readlink method of obtaining the bus type for GUI display does not work. If we haven't already resolved the bus type, we then also check smartctl for the transport protocol for SAS. @PartialVolume #350 
+- Check smartctl for unresolved bus types SATA  @PartialVolume #358 
+- Changed message from (No ATA pass-thru) to (S/N: unknown) as the reason the serial number is unknown is because there is no ATA pass through for the chipset being used by the USB to SATA adapter, basically we are making the message more meaningful for the end user rather than for the engineer/programmer that may understand the previous terminology used. @PartialVolume @Firminator #356 
+- Add drive temperature monitoring and display temperature in degrees Celsius in the GUI. Requires the kernel drivetemp module and makes use of the hwmon sub system in the kernel to extract drive temperatures. Nwipe will automatically load the drivetemp module if it's available. @PartialVolume #360 #361 #364
+- Remove /dev/ from gui for long device names. This fixes column alignment issues in the gui with nvme drives i.e. nvme0n1 etc. If the drive name including path exceeds 8 characters the /dev/ is removed and prefixed with spaces to a total max length of 8 characters. @PartialVolume #365 
+- Add -q --quiet option - anonymize serial numbers and SMBIOS-DMI data. This anonymizes serial numbers and related identifiable information for drives and hardware but does not remove model information in both the GUI and the log displayed by stdout at the end of a wipe and also in the log file if enabled in options. This feature is useful for uploading logs when submitting bug reports. @PartialVolume #366 #367 #371 #379 #383 
+- Fixes a intermittent FAILED message that is displayed in the summary table when the message should have been UABORTED. The incorrect FAILED message only occurred when using control-C to abort a wipe. @PartialVolume #373 
+- When many verification or pass errors are detected the status line can wrap on a 80 column display. This patch makes the error message more succinct which will free up about 10 characters & prevents the line wrapping. @PartialVolume #374 
+- Fixes a problem that occurs with a unresponsive drive that causes the ETA to grow to an enormous value. We now do not calculate an individual drives ETA  when the throughput of the drive is zero so avoiding the overall ETA being incorrect for drives that are working correctly when multiple drives are being simultaneously wiped. While a individual drives ETA is calculated it is not displayed but only used to determine the overall ETA when all drives have completed. @PartialVolume #375 
+- Add temperature monitoring and display with NVMe drives. @PartialVolume #377 #380 #381 
+- When one of the two verify only methods are selected change the drive selected text from WIPE to VRFY to indicate the drive is not being wiped, but is only being verified. @PartialVolume  #378 
+- Fixes a incorrect sector, block and device sizes in 32 bit builds only as displayed in the nwipe log. This problem had no affect on the wipe as the issue was caused by a incorrect format specifier that affected the log text only. @PartialVolume #387 #388 
+- Fixes a issue where temperatures may not have been available on Debian systems due to the location of modprobe. Particularly relevant to Debian which when logged in as root doesn't put /sbin in the $PATH environment setting. This issue was not necessarily relevant for Linux distros based on Debian, for instance, Ubuntu where nwipe would have found the modprobe command. @PartialVolume #390 #391 
+- Improve wipe thread cancellation error checking. @PartialVolume #392 
+- Improve GUI thread messaging if a pthread_join fails. @PartialVolume #393 
+- Fixed a missing serial number on SAS drive.@PartialVolume  #394 
+- Added ISAAC-64 for 64 bit systems. Thanks @chkboom #398 #401 
+- Fixes a problem with the Gutmann wipe where the random passes at the beginning and end were being re-arranged when only the inner passes should be rearranged. Thanks @chkboom #399
+- Fixes a obscure incorrect summary table status, while the log text correctly reports the failure. If the drive becomes non responsive during the wipe, the MB/s throughput will slowly drop towards 0MB/s and will display a FAILURE -1 error. The logs will correctly display errors and nwipe's return status will be non zero, however the summary table may display erased rather than FAILURE, this is because
+the wipe thread exited prematurely without setting the pass error. This fixes the error by checking the context's result status, i.e non zero on failure and if pass equals zero it makes pass equal to one. This is then picked up by the summary table log code which then marks the status
+correctly as FAILURE in the summary table. @PartialVolume #400 
+- Fixes a spurious message on abort before wipe.This patch fixes a minor display issue that occurs when a user aborts a wipe before a wipe has started. It only occurs if the user had selected one or more drives for wipe and then aborted before starting the wipe. The spurious message only occurs in a virtual terminal, i.e. /dev/tty1, /dev/tty2, /dev/console It does not occur in terminal applications such as konsole, xterm, terminator etc. The spurious message that appears in the main window, states that "/dev/sdxyz 100% complete" along with garbage values in the statistics window. The message appears for a fraction of a second before being replaced with the textual log information that correctly states that the user aborted and no wipe was started. Basically the gui status information update function tries to update the data when the wipe hasn't even started. The fix is to only update the statistics information only if a wipe has started by checking the 'global_wipe_status' value which indicates whether any wipe started. '1' indicates that a wipe has started, else '0' if no wipe has started. @PartialVolume #406 
+- Fixes temperature update in drive selection window. This fixes a problem where the drive temperature is not updated
+automatically in only the drive selection window. The temperature is however updated correctly every 60 seconds during a wipe in the wipe status window. This bug would probably never be noticed by most people as usually the drive temperature changes slowly and only rises once a wipe has started. The only time I imagine it would have been noticed would have been if the drive temperature was already high and you were trying to reduce the temperature by cooling before starting a wipe. This has now been corrected so that the temperature in the drive
+selection window is updated every 60 seconds. @PartialVolume #407 
+- Fixes a zombie nwipe process running at 100% CPU on one core but only on a Konsole based terminal. This only occurred when the Konsole terminal is exited while nwipe is sitting at the drive selection screen but nwipe did not exit when the konsole terminal was closed. If nwipe is exited normally on completion of a wipe or aborted by using control C then this problem would not be seen. Also occurs during a wipe if the konsole terminal is closed without exiting nwipe first, again only on Konsole based terminals. @PartialVolume #408 #409 
+- Fixes a obscure segfault when --logfile option used with a non writable directory. @PartialVolume #410 
+
+
+v0.32
+-----------------------
+- Add ones (0xFF) wipe to the methods. Renamed Zero Fill to Fill with Zeros and the new ones wipe, is called Fill with Ones.
+- Add ones verication to the methods. Renamed Verify Blank to Verify Zeros (0x00) and the new verification is called Verify Ones (0xFF).
+- Move method information from below the list of methods to the right of the method list. This allows better use of the screen space by allowing more methods to be added to the list, especially relevant to nwipe running as a standalone application on small distros such as shredos 2020 in frame buffer mode.
+- Removed the old DBAN syslinux.cfg configuration hints as not relevant to nwipe. See nwipe --help or man nwipe for command line options.
+- Add fdatasync errors to the error summary table.
+- During a wipe, you can now toggle between dark screen, blank screen and default blue screen by repeatedly pressing the b key. Dark screen, which is grey text on black background has been introduced to prevent TFT/LCD image persistence on monitors that are sensitive to that issue.
+
 v0.31
 -----------------------
 - Blanking disabled in GUI for OPS2 (mandatory requirement of standard). [#326](https://github.com/martijnvanbrummelen/nwipe/pull/326)
--- a/README.md
+++ b/README.md
@@ -3,46 +3,51 @@
 ![GitHub CI badge](https://github.com/martijnvanbrummelen/nwipe/workflows/ci_ubuntu_16.04/badge.svg)
 [![GitHub release](https://img.shields.io/github/release/martijnvanbrummelen/nwipe)](https://github.com/martijnvanbrummelen/nwipe/releases/)

-nwipe is a program that will securely erase the entire contents of disks. It can operate as both a command line
-tool without a GUI or with a ncurses GUI as shown in the example below. It can wipe a single drive or multiple
-disks simultaneously. Nwipe can be found in many Linux distro repositories and the latest version of nwipe is available as a Bootable USB flash image from [here](https://github.com/PartialVolume/shredos.2020.02/blob/master/README.md#obtaining-and-writing-shredos-to-a-usb-flash-drive-the-easy-way-). This can be written to a USB flash drive in seconds, allowing you to boot straight into nwipe.
+nwipe is a fork of the dwipe command originally used by Darik's Boot and Nuke (DBAN). nwipe was created out of a need to run the DBAN dwipe command outside of DBAN, in order to allow its use with any host distribution, thus giving better hardware support.
+
+nwipe is a program that will securely erase the entire contents of disks. It can wipe a single drive or multiple disks simultaneously. It can operate as both a command line tool without a GUI or with a ncurses GUI as shown in the example below:
+
+> **Warning**
+>  Nwipe does not currently support HDA (hidden disc area) detection. You will need to run hdparm to detect and if necessary correct the reported size of the disc prior to using nwipe.
+
+![Example wipe](/images/example_wipe.gif)
+
+<i>GIF showing six drives being simultaneously erased. It skips to the completion of all six wipes and shows five drives that were successfully erased and one drive that failed due to an I/O error. The drive that failed would then normally be physically destroyed. The five drives that were successfully wiped with zero errors or failures can then be redeployed.</i>

 The user can select from a variety of recognised secure erase methods which include:

-* Zero Fill          - Fills the device with zeros, one round only.
+* Fill With Zeros    - Fills the device with zeros (0x00), one round only.
+* Fill With Ones     - Fills the device with ones  (0xFF), one round only.
 * RCMP TSSIT OPS-II  - Royal Candian Mounted Police Technical Security Standard, OPS-II
 * DoD Short          - The American Department of Defense 5220.22-M short 3 pass wipe (passes 1, 2 & 7).
 * DoD 5220.22M       - The American Department of Defense 5220.22-M full 7 pass wipe.
 * Gutmann Wipe       - Peter Gutmann's method (Secure Deletion of Data from Magnetic and Solid-State Memory).
 * PRNG Stream        - Fills the device with a stream from the PRNG.
-* Verify only        - This method only reads the device and checks that it is all zero.
+* Verify Zeros       - This method only reads the device and checks that it is filled with zeros (0x00).
+* Verify Ones        - This method only reads the device and checks that it is filled with ones (0xFF).
 * HMG IS5 enhanced   - Secure Sanitisation of Protectively Marked Information or Sensitive Information

-It also includes the following pseudo random number generators:
+nwipe also includes the following pseudo random number generators:
 * Mersenne Twister
 * ISAAC

-It is a fork of the dwipe command used by
-Darik's Boot and Nuke (dban).  nwipe is included with [partedmagic](https://partedmagic.com), [SystemRescueCD](https://www.system-rescue.org), [gparted live](https://sourceforge.net/projects/gparted/files/gparted-live-testing/1.2.0-2/) and
-[ShredOS](https://github.com/nadenislamarre/shredos)/[ShredOS 2020](https://github.com/PartialVolume/shredos.2020.02) if you want a quick and easy, bootable CD or USB version. If you want a bootable version of the very latest nwipe master that you can write to a USB stick, see [quick and easy bootable version of nwipe master](https://github.com/martijnvanbrummelen/nwipe#quick--easy-usb-bootable-version-of-nwipe-master-for-x86_64-systems)
+These can be used to overwrite a drive with a stream of randomly generated characters.

-Nwipe was created out of a need to run the DBAN dwipe command outside
-of DBAN, in order to allow its use with any host distribution, thus
-giving better hardware support.
+nwipe can be found in many [Linux distro repositories](#which-linux-distro-uses-the-latest-nwipe).

-The example below shows six drives being simultaneously erased. The video skips to the completion of all six wipes and shows five drives that were successfully erased and one drive that failed due to a I/O error. The drive that failed would then normally be physically destroyed. The five drives that were successfully wiped with zero errors or failures can then be redeployed.
-
-![Example wipe](/images/example_wipe.gif)
+nwipe is also included in [ShredOS](https://github.com/PartialVolume/shredos.x86_64) which was developed in particular to showcase nwipe as a fast-to-boot standalone method similar to DBAN. ShredOS always contains the latest nwipe version.

 ## Compiling & Installing

+For a development setup, see the [Hacking section](#hacking) below. For a bootable version of the very latest nwipe master that you can write to an USB flash drive or CD/DVD, see the [Quick and easy bootable version of nwipe master section](#quick--easy-usb-bootable-version-of-nwipe-master-for-x86_64-systems) below.
+
 `nwipe` requires the following libraries to be installed:

 * ncurses
 * pthreads
 * parted

-and optionally, but recommended!, the following programs:
+and optionally, but recommended, the following programs:

 * dmidecode
 * readlink
@@ -83,19 +88,16 @@ Note. The following programs are optionally installed although recommended. 1. d
 #### dmidecode
 dmidecode provides SMBIOS/DMI host data to stdout or the log file. If you don't install it you won't see the SMBIOS/DMI host data at the beginning of nwipes log.

-#### coreutils (provides readlink) 
+#### coreutils (provides readlink)
 readlink determines the bus type, i.e. ATA, USB etc. Without it the --nousb option won't work and bus type information will be missing from nwipes selection and wipe windows. The coreutils package is often automatically installed as default in most if not all distros.

 #### smartmontools
 smartmontools obtains serial number information for supported USB to IDE/SATA adapters. Without it, drives plugged into USB ports will not show serial number information.

-
-If you want a quick and easy way to keep your copy of nwipe running the latest master release of nwipe see this section [automating the download and compilation](https://github.com/martijnvanbrummelen/nwipe#automating-the-download-and-compilation-process-for-debian-based-distros)
+If you want a quick and easy way to keep your copy of nwipe running the latest master release of nwipe see the [automating the download and compilation](#automating-the-download-and-compilation-process-for-debian-based-distros) section.

 ### Compilation

-For a development setup, see [the hacking section below](#Hacking).
-
 First create all the autoconf files:
 ```
 ./autogen.sh
@@ -131,10 +133,7 @@ make
 make install
 ```

-The `-O0 -g` flags disable optimisations. This is required if you're debugging with
-`gdb` in an IDE such as Kdevelop. With these optimisations enabled you won't be
-able to see the values of many variables in nwipe, not to mention the IDE won't step
-through the code properly.
+The `-O0 -g` flags disable optimisations. This is required if you're debugging with `gdb` in an IDE such as Kdevelop. With these optimisations enabled you won't be able to see the values of many variables in nwipe, not to mention the IDE won't step through the code properly.

 The `-Wall` and `-Wextra` flags enable all compiler warnings. Please submit code with zero warnings.

@@ -144,19 +143,18 @@ make format
 ```
 You will need `clang-format` installed to use the `format` command.

-
-Once done with your coding then the released/patch/fixed code can be compiled,
-with all the normal optimisations, using:
+Once done with your coding then the released/patch/fixed code can be compiled, with all the normal optimisations, using:
 ```
 ./configure --prefix=/usr && make && make install
 ```
+
 ## Automating the download and compilation process for Debian based distros.

-Here's a script that will do just that!. It will create a directory in your home folder called 'nwipe_master'. It installs all the libraries required to compile the software (build-essential) and all the libraries that nwipe requires (libparted etc). It downloads the latest master copy of nwipe from github. It then compiles the software and then runs the latest nwipe. It doesn't write over the version of nwipe that's installed in the repository (If you had nwipe already installed). To run the latest master version of nwipe manually you would run it like this `sudo ~/nwipe_master/nwipe/src/nwipe`
+Here's a script that will do just that! It will create a directory in your home folder called 'nwipe_master'. It installs all the libraries required to compile the software (build-essential) and all the libraries that nwipe requires (libparted etc). It downloads the latest master copy of nwipe from github. It then compiles the software and then runs the latest nwipe. It doesn't write over the version of nwipe that's installed in the repository (If you had nwipe already installed). To run the latest master version of nwipe manually you would run it like this `sudo ~/nwipe_master/nwipe/src/nwipe`

-You can run the script multiple times, the first time it's run it will install all the libraries, subsequent times it will just say the the libraries are upto date. As it always downloads a fresh copy of the nwipe master from Github, you can always stay up to date. Just run it to get the latest version of nwipe. It takes all of 11 seconds on my I7.
+You can run the script multiple times; the first time it's run it will install all the libraries; subsequent times it will just say the libraries are up to date. As it always downloads a fresh copy of the nwipe master from Github, you can always stay up to date. Just run it to get the latest version of nwipe. It only takes 11 seconds to compile on my i7.

-If you already have nwipe installed from the repository, you need to take care which version you are running. If you typed `nwipe` from any directory it will always run the original repository copy of nwipe. To run the latest nwipe you have to explicitly tell it where the new copy is, e.g in the directory `~/nwipe_master/nwipe/src` . That's why you would run it by typing `sudo ~/nwipe_master/nwipe/src/nwipe` alternatively you could cd to the directory and run it like this:
+If you already have nwipe installed from the repository, you need to take care which version you are running. If you typed `nwipe` from any directory it will always run the original repository copy of nwipe. To run the latest nwipe you have to explicitly tell it where the new copy is, e.g in the directory `~/nwipe_master/nwipe/src`. That's why you would run it by typing `sudo ~/nwipe_master/nwipe/src/nwipe` alternatively you could cd to the directory and run it like this:

 ```
 cd ~/nwipe_master/nwipe/src
@@ -165,7 +163,7 @@ cd ~/nwipe_master/nwipe/src

 Note the ./, that means only look in the current directory for nwipe. if you forgot to type ./ the computer would run the older repository version of nwipe.

-Once you have copied the script below into a file called  buildnwipe, you need to give the file execute permissions `chmod +x buildnwipe` before you can run it. [Download script](
+Once you have copied the script below into a file called buildnwipe, you need to give the file execute permissions `chmod +x buildnwipe` before you can run it. [Download script](
 https://drive.google.com/file/d/1BsQDlMqtEycAgfk9FpG1sxv3jFz5dzNO/view?usp=sharing)
 ```
 #!/bin/bash
@@ -183,12 +181,23 @@ make
 cd "src"
 sudo ./nwipe
 ```
-## Quick & Easy, USB bootable version of Nwipe Master for x86_64 systems.
-If you want to just try out a bootable version of nwipe you can download the ShredOS image that's using the latest version of nwipe master and burn it to a USB stick. Instructions and download can be found [here](https://github.com/PartialVolume/shredos.2020.02/blob/master/README.md#obtaining-and-writing-shredos-to-a-usb-flash-drive-the-easy-way-)

-## Which Linux distro uses the latest Nwipe?
+## Quick & Easy, USB bootable version of nwipe master for x86_64 systems.
+If you want to just try out a bootable version of nwipe you can download [ShredOS](https://github.com/PartialVolume/shredos.x86_64). The ShredOS image is around 60MB and can be written to an USB flash drive in seconds, allowing you to boot straight into the latest version of nwipe. ShredOS is available for x86_64 (64-bit) and i686 (32-bit) CPU architectures and will boot both legacy BIOS and UEFI devices. It comes as .IMG (bootable USB flash drive image) or .ISO (for CD-R/DVD-R). Instructions and download can be found [here](https://github.com/PartialVolume/shredos.x86_64#obtaining-and-writing-shredos-to-a-usb-flash-drive-the-easy-way-).
+
+## Which Linux distro uses the latest nwipe?
 See [Repology](https://repology.org/project/nwipe/versions)

+And in addition checkout the following distros that all include nwipe:
+
+- [ShredOS](https://github.com/PartialVolume/shredos.x86_64) Always has the latest nwipe release.
+- [netboot.xyz](https://github.com/netbootxyz/netboot.xyz) Can network-boot ShredOS.
+- [partedmagic](https://partedmagic.com)
+- [SystemRescueCD](https://www.system-rescue.org)
+- [gparted live](https://sourceforge.net/projects/gparted/files/gparted-live-testing/1.2.0-2/)
+
+Know of other distros that include nwipe? Then please let us know or issue a PR on this README.md. Thanks.
+
 ## Bugs

 Bugs can be reported on GitHub:
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.

 AC_PREREQ([2.64])
-AC_INIT([nwipe], [0.31], [git@brumit.nl])
+AC_INIT([nwipe], [0.34], [git@brumit.nl])
 AM_INIT_AUTOMAKE(foreign subdir-objects)
 AC_OUTPUT(Makefile src/Makefile man/Makefile)
 AC_CONFIG_SRCDIR([src/nwipe.c])
--- a/man/nwipe.1
+++ b/man/nwipe.1
@@ -1,4 +1,4 @@
-.TH NWIPE "1" "June 2021" "nwipe version 0.31" "User Commands"
+.TH NWIPE "1" "March 2022" "nwipe version 0.34" "User Commands"
 .SH NAME
 nwipe \- securely erase disks
 .SH SYNOPSIS
@@ -39,7 +39,7 @@ Power off system on completion of wipe delayed for for one minute. During
 this one minute delay you can abort the shutdown by typing sudo shutdown -c
 .TP
 \fB\-\-sync\fR=\fINUM\fR
-Will perform a syn after NUM writes (default: 10000)
+Will perform a syn after NUM writes (default: 100000)
 .IP
 0    \- fdatasync after the disk is completely written
       fdatasync errors not detected until completion.
@@ -98,9 +98,13 @@ ops2                   \- RCMP TSSIT OPS\-II
 .IP
 random / prng / stream \- PRNG Stream
 .IP
-zero / quick           \- Overwrite with zeros
+zero / quick           \- Overwrite with zeros 0x00
 .IP
-verify                 \- Verifies disk is zero filled
+one                    \- Overwrite with ones 0xFF
+.IP
+verify_zero            \- Verifies disk is zero filled
+.IP
+verify_one             \- Verifies disk is 0xFF filled
 .IP
 is5enh                 \- HMG IS5 enhanced
 .TP
@@ -108,7 +112,12 @@ is5enh                 \- HMG IS5 enhanced
 Filename to log to. Default is STDOUT
 .TP
 \fB\-p\fR, \fB\-\-prng\fR=\fIMETHOD\fR
-PRNG option (mersenne|twister|isaac)
+PRNG option (mersenne|twister|isaac|isaac64)
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+Anonymize serial numbers, Gui & logs display:
+ XXXXXXXX = S/N obtained & anonymized.
+ ???????? = S/N not available.
 .TP
 \fB\-r\fR, \fB\-\-rounds\fR=\fINUM\fR
 Number of times to wipe the device using the selected method (default: 1)
@@ -128,4 +137,3 @@ Nwipe is developed by Martijn van Brummelen <github@brumit.nl>
 .BR dd (1),
 .BR dcfldd (1),
 .BR dc3dd (1)
-
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -6,6 +6,5 @@ AM_LDFLAGS =
 # this lists the binaries to produce, the (non-PHONY, binary) targets in
 # the previous manual Makefile
 bin_PROGRAMS = nwipe
-nwipe_SOURCES = context.h isaac_rand/isaac_rand.c logging.h options.h prng.h nwipe.c gui.c isaac_rand/isaac_rand.h method.h pass.c device.c gui.h isaac_rand/isaac_standard.h mt19937ar-cok/mt19937ar-cok.c nwipe.h mt19937ar-cok/mt19937ar-cok.h pass.h device.h logging.c method.c options.c prng.c version.c version.h
-nwipe_CFLAGS = $(PARTED_CFLAGS)
+nwipe_SOURCES = context.h logging.h options.h prng.h version.h temperature.h nwipe.c gui.c method.h pass.c device.c gui.h isaac_rand/isaac_standard.h isaac_rand/isaac_rand.h isaac_rand/isaac_rand.c isaac_rand/isaac64.h isaac_rand/isaac64.c mt19937ar-cok/mt19937ar-cok.c nwipe.h mt19937ar-cok/mt19937ar-cok.h pass.h device.h logging.c method.c options.c prng.c version.c temperature.c
 nwipe_LDADD = $(PARTED_LIBS)
--- a/src/context.h
+++ b/src/context.h
@@ -34,7 +34,8 @@ typedef enum nwipe_device_t_ {
    NWIPE_DEVICE_IEEE1394,  // Unimplemented.
    NWIPE_DEVICE_ATA,
    NWIPE_DEVICE_NVME,
-    NWIPE_DEVICE_VIRT
+    NWIPE_DEVICE_VIRT,
+    NWIPE_DEVICE_SAS
 } nwipe_device_t;

 typedef enum nwipe_pass_t_ {
@@ -71,6 +72,9 @@ typedef struct nwipe_speedring_t_
 #define NWIPE_DEVICE_LABEL_LENGTH 200
 #define NWIPE_DEVICE_SIZE_TXT_LENGTH 7

+// Arbitary length, so far most paths don't exceed about 25 characters
+#define MAX_HWMON_PATH_LENGTH 100
+
 typedef struct nwipe_context_t_
 {
    /*
@@ -87,7 +91,9 @@ typedef struct nwipe_context_t_
    int device_minor;  // The minor device number.
    int device_part;  // The device partition or slice number.
    char* device_name;  // The device file name.
-    long long device_size;  // The device size in bytes.
+    char device_name_without_path[100];
+    char gui_device_name[100];
+    unsigned long long device_size;  // The device size in bytes.
    char* device_size_text;  // The device size in a more (human)readable format.
    char device_size_txt[NWIPE_DEVICE_SIZE_TXT_LENGTH];  // The device size in a more (human)readable format.
    char* device_model;  // The model of the device.
@@ -123,12 +129,28 @@ typedef struct nwipe_context_t_
    pthread_t thread;  // The ID of the thread.
    u64 throughput;  // Average throughput in bytes per second.
    u64 verify_errors;  // The number of verification errors across all passes.
+    char temp1_path[MAX_HWMON_PATH_LENGTH];  // path to temperature variables /sys/class/hwmon/hwmonX/ etc.
+    int temp1_crit;  // Critical high drive temperature, 1000000=unitialised, millidegree celsius.
+    int temp1_highest;  // Historical highest temperature reached, 1000000=unitialised, millidegree celsius.
+    int temp1_input;  // drive temperature, -1=unitialised. 1000000=unitialised, millidegree celsius.
+    int temp1_lcrit;  // Critical low drive temperature, 1000000=unitialised, millidegree celsius.
+    int temp1_lowest;  // Historically lowest temperature, 1000000=unitialised, millidegree celsius.
+    int temp1_max;  // Maximum allowed temperature, 1000000=unitialised, millidegree celsius.
+    int temp1_min;  // Miniumum allowed temperature, 1000000=unitialised, millidegree celsius.
+    int temp1_monitored_wipe_max;
+    int temp1_monitored_wipe_min;
+    int temp1_monitored_wipe_avg;
+    int temp1_flash_rate;  // number relates to one tenth of a second, so 2 means a flash on and off = 0.4s
+    int temp1_flash_rate_counter;  // used by the gui for timing the flash rate
+    int temp1_flash_rate_status;  // 0=blank 1=visible
+    time_t temp1_time;  // The time when temperature was last checked, seconds since epoch
    int wipe_status;  // Wipe finished = 0, wipe in progress = 1, wipe yet to start = -1.
    int spinner_idx;  // Index into the spinner character array
    char spinner_character[1];  // The current spinner character
    double duration;  // Duration of the wipe in seconds
    time_t start_time;  // Start time of wipe
    time_t end_time;  // End time of wipe
+    u64 fsyncdata_errors;  // The number of fsyncdata errors across all passes.
    /*
     * Identity contains the raw serial number of the drive
     * (where applicable), however, for use within nwipe use the
--- a/src/device.c
+++ b/src/device.c
@@ -207,13 +207,34 @@ int check_device( nwipe_context_t*** c, PedDevice* dev, int dcount )
    /* Get device information */
    next_device->device_model = dev->model;
    remove_ATA_prefix( next_device->device_model );
+
+    /* full device name, i.e. /dev/sda */
    next_device->device_name = dev->path;
+
+    /* remove /dev/ from device, right justify and prefix name so string length is eight characters */
+    nwipe_strip_path( next_device->device_name_without_path, next_device->device_name );
+
+    /* To maintain column alignment in the gui we have to remove /dev/ from device names that
+     * exceed eight characters including the /dev/ path.
+     */
+    if( strlen( next_device->device_name ) > MAX_LENGTH_OF_DEVICE_STRING )
+    {
+        strcpy( next_device->gui_device_name, next_device->device_name_without_path );
+    }
+    else
+    {
+        strcpy( next_device->gui_device_name, next_device->device_name );
+    }
+
    next_device->device_size = dev->length * dev->sector_size;
    Determine_C_B_nomenclature( next_device->device_size, next_device->device_size_txt, NWIPE_DEVICE_SIZE_TXT_LENGTH );
    next_device->device_size_text = next_device->device_size_txt;
    next_device->result = -2;

-    /* Attempt to get serial number of device. */
+    /* Attempt to get serial number of device.
+     */
+    next_device->device_serial_no[0] = 0; /* initialise the serial number */
+
    if( ( fd = open( next_device->device_name = dev->path, O_RDONLY ) ) == ERR )
    {
        nwipe_log( NWIPE_LOG_WARNING, "Unable to open device %s to obtain serial number", next_device->device_name );
@@ -251,6 +272,19 @@ int check_device( nwipe_context_t*** c, PedDevice* dev, int dcount )
        }
    }

+    /* Does the user want to anonymize serial numbers ? */
+    if( nwipe_options.quiet )
+    {
+        if( next_device->device_serial_no[0] == 0 )
+        {
+            strcpy( next_device->device_serial_no, "???????????????" );
+        }
+        else
+        {
+            strcpy( next_device->device_serial_no, "XXXXXXXXXXXXXXX" );
+        }
+    }
+
    /* All device strings should be 4 characters, prefix with space if under 4 characters */
    switch( next_device->device_type )
    {
@@ -289,13 +323,17 @@ int check_device( nwipe_context_t*** c, PedDevice* dev, int dcount )
        case NWIPE_DEVICE_VIRT:
            strcpy( next_device->device_type_str, "VIRT" );
            break;
+
+        case NWIPE_DEVICE_SAS:
+            strcpy( next_device->device_type_str, " SAS" );
+            break;
    }

    if( strlen( (const char*) next_device->device_serial_no ) )
    {
        snprintf( next_device->device_label,
                  NWIPE_DEVICE_LABEL_LENGTH,
-                  "%s %s (%s) %s/%s",
+                  "%s %s [%s] %s/%s",
                  next_device->device_name,
                  next_device->device_type_str,
                  next_device->device_size_text,
@@ -306,7 +344,7 @@ int check_device( nwipe_context_t*** c, PedDevice* dev, int dcount )
    {
        snprintf( next_device->device_label,
                  NWIPE_DEVICE_LABEL_LENGTH,
-                  "%s %s (%s) %s",
+                  "%s %s [%s] %s",
                  next_device->device_name,
                  next_device->device_type_str,
                  next_device->device_size_text,
@@ -325,7 +363,7 @@ int check_device( nwipe_context_t*** c, PedDevice* dev, int dcount )
    return 1;
 }

-/* Remove leading/training whitespace from a string and left justify result */
+/* Remove leading/trailing whitespace from a string and left justify result */
 char* trim( char* str )
 {
    size_t len = 0;
@@ -393,7 +431,7 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, c
     * 2 = readlink exit code not 0, see nwipe logs
     * 3 = popen failed to create stream for smartctl
     * 4 = smartctl command not found, install smartmontools
-     * 5 = smartctl detected un supported USB to IDE/SATA adapter
+     * 5 = smartctl detected unsupported USB to IDE/SATA adapter
     * 6 = All other errors !
     *
     */
@@ -406,6 +444,8 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, c
    int device_len;
    int set_return_value;
    int exit_status;
+    int idx;
+    int idx2;

    char readlink_command[] = "readlink /sys/block/%s";
    char readlink_command2[] = "/usr/bin/readlink /sys/block/%s";
@@ -417,6 +457,10 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, c
    char result[512];
    char final_cmd_readlink[sizeof( readlink_command ) + sizeof( device_shortform )];
    char final_cmd_smartctl[sizeof( smartctl_command ) + 256];
+    char* pResult;
+    char smartctl_labels_to_anonymize[][18] = {
+        "serial number:", "lu wwn device id:", "logical unit id:", "" /* Don't remove this empty string !, important */
+    };

    /* Initialise return value */
    set_return_value = 0;
@@ -464,7 +508,7 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, c
                nwipe_log( NWIPE_LOG_WARNING, "Command not found. Install readlink !" );
                set_return_value = 2;

-                /* Return immediatley if --nousb specified. Readlink is a requirment for this option. */
+                /* Return immediately if --nousb specified. Readlink is a requirement for this option. */
                if( nwipe_options.nousb )
                {
                    return set_return_value;
@@ -616,19 +660,100 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, c
            /* Read the output a line at a time - output it. */
            while( fgets( result, sizeof( result ) - 1, fp ) != NULL )
            {
+                /* Convert the label, i.e everything before the ':' to lower case, it's required to
+                 * convert to lower case as smartctl seems to use inconsistent case when labeling
+                 * for serial number, i.e mostly it produces labels "Serial Number:" but occasionaly
+                 * it produces a label "Serial number:" */
+
+                idx = 0;
+                while( result[idx] != 0 && result[idx] != ':' )
+                {
+                    /* If upper case alpha character, change to lower case */
+                    if( result[idx] >= 'A' && result[idx] <= 'Z' )
+                    {
+                        result[idx] += 32;
+                    }
+
+                    idx++;
+                }
+
                if( nwipe_options.verbose && result[0] != 0x0A )
                {
                    strip_CR_LF( result );
+
+                    /* Remove serial number if -q option specified */
+                    if( nwipe_options.quiet )
+                    {
+                        /* initialise index into string array */
+                        idx2 = 0;
+
+                        while( smartctl_labels_to_anonymize[idx2][0] != 0 )
+                        {
+                            if( ( pResult = strstr( result, &smartctl_labels_to_anonymize[idx2][0] ) ) != 0 )
+                            {
+                                /* set index to character after end of label string */
+                                idx = strlen( &smartctl_labels_to_anonymize[idx2][0] );
+
+                                /* Ignore spaces, overwrite other characters */
+                                while( *( pResult + idx ) != 0x0A && *( pResult + idx ) != 0x0D
+                                       && *( pResult + idx ) != 0 && idx <= sizeof( result ) - 1 )
+                                {
+                                    if( *( pResult + idx ) == ' ' )
+                                    {
+                                        idx++;
+                                        continue;
+                                    }
+                                    else
+                                    {
+                                        /* ignore if the serial number has been written over with '?' */
+                                        if( *( pResult + idx ) != '?' )
+                                        {
+                                            *( pResult + idx ) = 'X';
+                                        }
+                                        idx++;
+                                    }
+                                }
+                            }
+                            idx2++;
+                        }
+                    }
+
                    nwipe_log( NWIPE_LOG_DEBUG, "smartctl: %s", result );
                }

-                if( strstr( result, "Serial Number:" ) != 0 )
+                if( strstr( result, "serial number:" ) != 0 )
                {
                    /* strip any leading or trailing spaces and left justify, +15 is the length of "Serial Number:" */
                    trim( &result[15] );

                    strncpy( serialnumber, &result[15], 20 );
                }
+
+                if( *bus == 0 )
+                {
+                    if( strstr( result, "transport protocol:" ) != 0 )
+                    {
+                        /* strip any leading or trailing spaces and left justify, +4 is the length of "bus type:" */
+                        trim( &result[19] );
+
+                        if( strncmp( &result[19], "sas", 3 ) == 0 )
+                        {
+                            *bus = NWIPE_DEVICE_SAS;
+                        }
+                    }
+
+                    if( strstr( result, "sata version is:" ) != 0 )
+                    {
+
+                        /* strip any leading or trailing spaces and left justify, +4 is the length of "bus type:" */
+                        trim( &result[16] );
+
+                        if( strncmp( &result[16], "sata", 4 ) == 0 )
+                        {
+                            *bus = NWIPE_DEVICE_ATA;
+                        }
+                    }
+                }
            }

            /* close */
@@ -655,11 +780,11 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, c

                if( exit_status == 1 )
                {
-                    nwipe_log( NWIPE_LOG_WARNING, "%s USB bridge, no passthru support", device );
+                    nwipe_log( NWIPE_LOG_WARNING, "%s USB bridge, no pass-through support", device );

                    if( *bus == NWIPE_DEVICE_USB )
                    {
-                        strcpy( serialnumber, "(no ATA pass thru)" );
+                        strcpy( serialnumber, "(S/N: unknown)" );
                        set_return_value = 5;
                    }
                }
@@ -687,7 +812,7 @@ void strip_CR_LF( char* str )

 void remove_ATA_prefix( char* str )
 {
-    /* Remove "ATA " prefix if present in the model no. string, left justifing string */
+    /* Remove "ATA" prefix if present in the model no. string, left justifing string */

    int idx_pre = 4;
    int idx_post = 0;
--- a/src/device.h
+++ b/src/device.h
@@ -23,6 +23,8 @@
 #ifndef DEVICE_H_
 #define DEVICE_H_

+#define MAX_LENGTH_OF_DEVICE_STRING 8
+
 void nwipe_device_identify( nwipe_context_t* c );  // Get hardware information about the device.
 int nwipe_device_scan( nwipe_context_t*** c );  // Find devices that we can wipe.
 int nwipe_device_get( nwipe_context_t*** c, char** devnamelist, int ndevnames );  // Get info about devices to wipe.
@@ -30,5 +32,6 @@ int nwipe_get_device_bus_type_and_serialno( char*, nwipe_device_t*, char* );
 void strip_CR_LF( char* );
 void determine_disk_capacity_nomenclature( u64, char* );
 void remove_ATA_prefix( char* );
+char* trim( char* );

 #endif /* DEVICE_H_ */
--- a/src/gui.c
+++ b/src/gui.c
--- a/src/gui.h
+++ b/src/gui.h
@@ -31,6 +31,7 @@ void nwipe_gui_create_footer_window( const char* );  // Create the footer window
 void nwipe_gui_create_options_window( void );  // Create the options window
 void nwipe_gui_create_stats_window( void );  // Create the stats window
 void nwipe_gui_create_all_windows_on_terminal_resize(
+    int force_creation,
    const char* footer_text );  // If terminal is resized recreate all windows
 void nwipe_gui_select( int count, nwipe_context_t** c );  // Select devices to wipe.
 void* nwipe_gui_status( void* ptr );  // Update operation progress.
@@ -41,10 +42,21 @@ void nwipe_gui_rounds( void );  // Change the rounds option.
 void nwipe_gui_verify( void );  // Change the verify option.
 void nwipe_gui_noblank( void );  // Change the noblank option.
 int spinner( nwipe_context_t** ptr, int );  // Return the next spinner character
+void temp1_flash( nwipe_context_t* );  // toggles term1_flash_status, which flashes the temperature
+void wprintw_temperature( nwipe_context_t* );

 int compute_stats( void* ptr );
 void nwipe_update_speedring( nwipe_speedring_t* speedring, u64 speedring_done, time_t speedring_now );

 #define NOMENCLATURE_RESULT_STR_SIZE 8

+/* Note Do not change unless you understand how this value affects keyboard response and screen refresh when
+ * the drive selection screen is displayed. (prior to wipe starting). */
+#define GETCH_BLOCK_MS 250 /* millisecond block time for getch() */
+
+/* Note The value of 1 (100ms) is the ideal speed for screen refresh during a wipe, a value of 2 is noticably slower,
+ * don't change unless you understand how this value affects keyboard responsiveness and speed of screen stats/spinner
+ * updating */
+#define GETCH_GUI_STATS_UPDATE_MS 1 /* 1 * 100 = 1/10/sec = millisecond block time for gui stats screen updates */
+
 #endif /* GUI_H_ */
--- a/src/isaac_rand/isaac64.c
+++ b/src/isaac_rand/isaac64.c
@@ -0,0 +1,119 @@
+/*
+------------------------------------------------------------------------------
+isaac64.c: My random number generator for 64-bit machines.
+By Bob Jenkins, 1996.  Public Domain.
+------------------------------------------------------------------------------
+*/
+#ifndef STANDARD
+#include "isaac_standard.h"
+#endif
+#ifndef ISAAC64
+#include "isaac64.h"
+#endif
+
+
+#define ind(mm,x)  (*(ub8 *)((ub1 *)(mm) + ((x) & ((RANDSIZ-1)<<3))))
+#define rngstep(mix,a,b,mm,m,m2,r,x) \
+{ \
+  x = *m;  \
+  a = (mix) + *(m2++); \
+  *(m++) = y = ind(mm,x) + a + b; \
+  *(r++) = b = ind(mm,y>>RANDSIZL) + x; \
+}
+
+void isaac64(rand64ctx *ctx)
+{
+  register ub8 a,b,x,y,*m,*mm,*m2,*r,*mend;
+  mm=ctx->mm; r=ctx->randrsl;
+  a = ctx->aa; b = ctx->bb + (++ctx->cc);
+  for (m = mm, mend = m2 = m+(RANDSIZ/2); m<mend; )
+  {
+    rngstep(~(a^(a<<21)), a, b, mm, m, m2, r, x);
+    rngstep(  a^(a>>5)  , a, b, mm, m, m2, r, x);
+    rngstep(  a^(a<<12) , a, b, mm, m, m2, r, x);
+    rngstep(  a^(a>>33) , a, b, mm, m, m2, r, x);
+  }
+  for (m2 = mm; m2<mend; )
+  {
+    rngstep(~(a^(a<<21)), a, b, mm, m, m2, r, x);
+    rngstep(  a^(a>>5)  , a, b, mm, m, m2, r, x);
+    rngstep(  a^(a<<12) , a, b, mm, m, m2, r, x);
+    rngstep(  a^(a>>33) , a, b, mm, m, m2, r, x);
+  }
+  ctx->bb = b; ctx->aa = a;
+}
+
+#define mix(a,b,c,d,e,f,g,h) \
+{ \
+   a-=e; f^=h>>9;  h+=a; \
+   b-=f; g^=a<<9;  a+=b; \
+   c-=g; h^=b>>23; b+=c; \
+   d-=h; a^=c<<15; c+=d; \
+   e-=a; b^=d>>14; d+=e; \
+   f-=b; c^=e<<20; e+=f; \
+   g-=c; d^=f>>17; f+=g; \
+   h-=d; e^=g<<14; g+=h; \
+}
+
+void rand64init(rand64ctx *ctx, word flag)
+{
+   word i;
+   ub8 a,b,c,d,e,f,g,h;
+   ub8 *mm, *randrsl;
+   ctx->aa = ctx->bb = ctx->cc = (ub8)0;
+   mm=ctx->mm;
+   randrsl=ctx->randrsl;
+   a=b=c=d=e=f=g=h=0x9e3779b97f4a7c13LL;  /* the golden ratio */
+
+   for (i=0; i<4; ++i)                    /* scramble it */
+   {
+     mix(a,b,c,d,e,f,g,h);
+   }
+
+   for (i=0; i<RANDSIZ; i+=8)   /* fill in mm[] with messy stuff */
+   {
+     if (flag)                  /* use all the information in the seed */
+     {
+       a+=randrsl[i  ]; b+=randrsl[i+1]; c+=randrsl[i+2]; d+=randrsl[i+3];
+       e+=randrsl[i+4]; f+=randrsl[i+5]; g+=randrsl[i+6]; h+=randrsl[i+7];
+     }
+     mix(a,b,c,d,e,f,g,h);
+     mm[i  ]=a; mm[i+1]=b; mm[i+2]=c; mm[i+3]=d;
+     mm[i+4]=e; mm[i+5]=f; mm[i+6]=g; mm[i+7]=h;
+   }
+
+   if (flag) 
+   {        /* do a second pass to make all of the seed affect all of mm */
+     for (i=0; i<RANDSIZ; i+=8)
+     {
+       a+=mm[i  ]; b+=mm[i+1]; c+=mm[i+2]; d+=mm[i+3];
+       e+=mm[i+4]; f+=mm[i+5]; g+=mm[i+6]; h+=mm[i+7];
+       mix(a,b,c,d,e,f,g,h);
+       mm[i  ]=a; mm[i+1]=b; mm[i+2]=c; mm[i+3]=d;
+       mm[i+4]=e; mm[i+5]=f; mm[i+6]=g; mm[i+7]=h;
+     }
+   }
+
+   isaac64(ctx);          /* fill in the first set of results */
+   ctx->randcnt=RANDSIZ;  /* prepare to use the first set of results */
+}
+
+#ifdef NEVER
+int main()
+{
+  ub8 i,j;
+  rand64ctx ctx;
+  ctx.aa=ctx.bb=ctx.cc=(ub8)0;
+  for (i=0; i<RANDSIZ; ++i) ctx.mm[i]=(ub8)0;
+  rand64init(&ctx, TRUE);
+  for (i=0; i<2; ++i)
+  {
+    isaac64(&ctx);
+    for (j=0; j<RANDSIZ; ++j)
+    {
+      printf("%.8lx%.8lx",(ub4)(ctx.randrsl[j]>>32),(ub4)ctx.randrsl[j]);
+      if ((j&3)==3) printf("\n");
+    }
+  }
+}
+#endif
--- a/src/isaac_rand/isaac64.h
+++ b/src/isaac_rand/isaac64.h
@@ -0,0 +1,41 @@
+/*
+------------------------------------------------------------------------------
+isaac64.h: definitions for a random number generator
+Bob Jenkins, 1996, Public Domain
+------------------------------------------------------------------------------
+*/
+#ifndef ISAAC64
+#define ISAAC64
+
+#include "isaac_standard.h"
+
+struct rand64ctx
+{
+ ub8 randrsl[RANDSIZ], randcnt;
+ ub8 mm[RANDSIZ];
+ ub8 aa, bb, cc;
+};
+typedef struct rand64ctx rand64ctx;
+
+/*
+------------------------------------------------------------------------------
+ If (flag==TRUE), then use the contents of randrsl[0..255] as the seed.
+------------------------------------------------------------------------------
+*/
+void rand64init(rand64ctx *r, word flag);
+
+void isaac64(rand64ctx *ctx);
+
+
+/*
+------------------------------------------------------------------------------
+ Call rand64() to retrieve a single 64-bit random value
+------------------------------------------------------------------------------
+*/
+#define isaac64_rand() \
+   (!(r)->randcnt-- ? \
+     (isaac64(r), (r)->randcnt=RANDSIZ-1, (r)->randrsl[(r)->>randcnt]) : \
+     (r)->randrsl[(r)->randcnt])
+
+#endif  /* ISAAC64 */
+
--- a/src/isaac_rand/isaac_rand.h
+++ b/src/isaac_rand/isaac_rand.h
@@ -10,14 +10,10 @@ MODIFIED:
  010626: note this is public domain
 ------------------------------------------------------------------------------
 */
-#ifndef STANDARD
-#include "isaac_standard.h"
-#endif
-
 #ifndef RAND
 #define RAND
-#define RANDSIZL   (4)  /* I recommend 8 for crypto, 4 for simulations */
-#define RANDSIZ    (1<<RANDSIZL)
+
+#include "isaac_standard.h"

 /* context of random number generator */
 struct randctx
--- a/src/isaac_rand/isaac_standard.h
+++ b/src/isaac_rand/isaac_standard.h
@@ -54,4 +54,7 @@ typedef                 int  word;  /* fastest type available */
 #define FALSE 0
 #define SUCCESS 0  /* 1 on VAX */

+#define RANDSIZL   (8)  /* I recommend 8 for crypto, 4 for simulations */
+#define RANDSIZ    (1<<RANDSIZL)
+
 #endif /* STANDARD */
--- a/src/logging.c
+++ b/src/logging.c
@@ -51,6 +51,9 @@ void nwipe_log( nwipe_log_t level, const char* format, ... )
     *
     */

+    extern int terminate_signal;
+    extern int user_abort;
+
    char** result;
    char* malloc_result;
    char message_buffer[MAX_LOG_LINE_CHARS * sizeof( char )];
@@ -326,57 +329,64 @@ void nwipe_log( nwipe_log_t level, const char* format, ... )
        /* Open the log file for appending. */
        fp = fopen( nwipe_options.logfile, "a" );

-        if( fp == NULL )
+        if( fp != NULL )
        {
-            fprintf( stderr, "nwipe_log: Unable to open '%s' for logging.\n", nwipe_options.logfile );
+
+            /* Get the file descriptor of the log file. */
+            fd = fileno( fp );
+
+            /* Block and lock. */
+            r = flock( fd, LOCK_EX );
+
+            if( r != 0 )
+            {
+                perror( "nwipe_log: flock:" );
+                fprintf( stderr, "nwipe_log: Unable to lock '%s' for logging.\n", nwipe_options.logfile );
+                r = pthread_mutex_unlock( &mutex1 );
+                if( r != 0 )
+                {
+                    fprintf( stderr, "nwipe_log: pthread_mutex_unlock failed. Code %i \n", r );
+
+                    /* Unlock the file. */
+                    r = flock( fd, LOCK_UN );
+                    fclose( fp );
+                    return;
+                }
+            }
+
+            fprintf( fp, "%s\n", log_lines[log_current_element] );
+
+            /* Unlock the file. */
+            r = flock( fd, LOCK_UN );
+
+            if( r != 0 )
+            {
+                perror( "nwipe_log: flock:" );
+                fprintf( stderr, "Error: Unable to unlock '%s' after logging.\n", nwipe_options.logfile );
+            }
+
+            /* Close the stream. */
+            r = fclose( fp );
+
+            if( r != 0 )
+            {
+                perror( "nwipe_log: fclose:" );
+                fprintf( stderr, "Error: Unable to close '%s' after logging.\n", nwipe_options.logfile );
+            }
+        }
+        else
+        {
+            /* Tell user we can't create/open the log and terminate nwipe */
+            fprintf(
+                stderr, "\nERROR:Unable to create/open '%s' for logging, permissions?\n\n", nwipe_options.logfile );
            r = pthread_mutex_unlock( &mutex1 );
            if( r != 0 )
            {
                fprintf( stderr, "nwipe_log: pthread_mutex_unlock failed. Code %i \n", r );
-                return;
            }
-        }
-
-        /* Get the file descriptor of the log file. */
-        fd = fileno( fp );
-
-        /* Block and lock. */
-        r = flock( fd, LOCK_EX );
-
-        if( r != 0 )
-        {
-            perror( "nwipe_log: flock:" );
-            fprintf( stderr, "nwipe_log: Unable to lock '%s' for logging.\n", nwipe_options.logfile );
-            r = pthread_mutex_unlock( &mutex1 );
-            if( r != 0 )
-            {
-                fprintf( stderr, "nwipe_log: pthread_mutex_unlock failed. Code %i \n", r );
-
-                /* Unlock the file. */
-                r = flock( fd, LOCK_UN );
-                fclose( fp );
-                return;
-            }
-        }
-
-        fprintf( fp, "%s\n", log_lines[log_current_element] );
-
-        /* Unlock the file. */
-        r = flock( fd, LOCK_UN );
-
-        if( r != 0 )
-        {
-            perror( "nwipe_log: flock:" );
-            fprintf( stderr, "Error: Unable to unlock '%s' after logging.\n", nwipe_options.logfile );
-        }
-
-        /* Close the stream. */
-        r = fclose( fp );
-
-        if( r != 0 )
-        {
-            perror( "nwipe_log: fclose:" );
-            fprintf( stderr, "Error: Unable to close '%s' after logging.\n", nwipe_options.logfile );
+            user_abort = 1;
+            terminate_signal = 1;
+            return;
        }
    }

@@ -498,29 +508,36 @@ int nwipe_log_sysinfo()
     * be logged, making sure the last entry in the array is a NULL string. To remove
     * an entry simply comment out the keyword with //
     */
-    char dmidecode_keywords[][24] = {
-        "bios-version",
-        "bios-release-date",
-        "system-manufacturer",
-        "system-product-name",
-        "system-version",
-        "system-serial-number",
-        "system-uuid",
-        "baseboard-manufacturer",
-        "baseboard-product-name",
-        "baseboard-version",
-        "baseboard-serial-number",
-        "baseboard-asset-tag",
-        "chassis-manufacturer",
-        "chassis-type",
-        "chassis-version",
-        "chassis-serial-number",
-        "chassis-asset-tag",
-        "processor-family",
-        "processor-manufacturer",
-        "processor-version",
-        "processor-frequency",
-        ""  // terminates the keyword array. DO NOT REMOVE
+
+    /* The 0/1 after the keyword determines whether the data for this
+     * keyword is displayed when -q (anonymize) has been specified
+     * by the user. An quick reminder about multi dimensional arrays, the first
+     * []=the keyword (0-21) including the empty string. The second [] is the
+     * 1 or 0 value (0 or 1). The third [] is the index value into either string.
+     */
+    char dmidecode_keywords[][2][24] = {
+        { "bios-version", "1" },
+        { "bios-release-date", "1" },
+        { "system-manufacturer", "1" },
+        { "system-product-name", "1" },
+        { "system-version", "1" },
+        { "system-serial-number", "0" },
+        { "system-uuid", "0" },
+        { "baseboard-manufacturer", "1" },
+        { "baseboard-product-name", "1" },
+        { "baseboard-version", "1" },
+        { "baseboard-serial-number", "0" },
+        { "baseboard-asset-tag", "0" },
+        { "chassis-manufacturer", "1" },
+        { "chassis-type", "1" },
+        { "chassis-version", "1" },
+        { "chassis-serial-number", "0" },
+        { "chassis-asset-tag", "0" },
+        { "processor-family", "1" },
+        { "processor-manufacturer", "1" },
+        { "processor-version", "1" },
+        { "processor-frequency", "1" },
+        { "", "" }  // terminates the keyword array. DO NOT REMOVE
    };

    char dmidecode_command[] = "dmidecode -s %s";
@@ -563,9 +580,9 @@ int nwipe_log_sysinfo()
    {

        /* Run the dmidecode command to retrieve each dmidecode keyword, one at a time */
-        while( dmidecode_keywords[keywords_idx][0] != 0 )
+        while( dmidecode_keywords[keywords_idx][0][0] != 0 )
        {
-            sprintf( cmd, p_dmidecode_command, &dmidecode_keywords[keywords_idx][0] );
+            sprintf( cmd, p_dmidecode_command, &dmidecode_keywords[keywords_idx][0][0] );
            fp = popen( cmd, "r" );
            if( fp == NULL )
            {
@@ -581,7 +598,22 @@ int nwipe_log_sysinfo()
                {
                    path[len - 1] = 0;
                }
-                nwipe_log( NWIPE_LOG_NOTICE, "%s = %s", &dmidecode_keywords[keywords_idx][0], path );
+                if( nwipe_options.quiet )
+                {
+                    if( *( &dmidecode_keywords[keywords_idx][1][0] ) == '0' )
+                    {
+                        nwipe_log(
+                            NWIPE_LOG_NOTICE, "%s = %s", &dmidecode_keywords[keywords_idx][0][0], "XXXXXXXXXXXXXXX" );
+                    }
+                    else
+                    {
+                        nwipe_log( NWIPE_LOG_NOTICE, "%s = %s", &dmidecode_keywords[keywords_idx][0][0], path );
+                    }
+                }
+                else
+                {
+                    nwipe_log( NWIPE_LOG_NOTICE, "%s = %s", &dmidecode_keywords[keywords_idx][0][0], path );
+                }
            }
            /* close */
            r = pclose( fp );
@@ -607,7 +639,7 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
    int i;
    int idx_src;
    int idx_dest;
-    char device[7];
+    char device[18];
    char status[9];
    char throughput[13];
    char total_throughput_string[13];
@@ -662,24 +694,21 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
    nwipe_log( NWIPE_LOG_NOTIMESTAMP, "" );
    nwipe_log( NWIPE_LOG_NOTIMESTAMP,
               "******************************** Error Summary *********************************" );
-    nwipe_log( NWIPE_LOG_NOTIMESTAMP, "! Device | Pass Errors | Verifications Errors |" );
+    nwipe_log( NWIPE_LOG_NOTIMESTAMP, "!   Device | Pass Errors | Verifications Errors | Fdatasync I\\O Errors" );
    nwipe_log( NWIPE_LOG_NOTIMESTAMP,
               "--------------------------------------------------------------------------------" );

    for( i = 0; i < nwipe_selected; i++ )
    {
-        if( c[i]->pass_errors != 0 || c[i]->verify_errors != 0 )
+        if( c[i]->pass_errors != 0 || c[i]->verify_errors != 0 || c[i]->fsyncdata_errors != 0 )
        {
            strncpy( exclamation_flag, "!", 1 );
            exclamation_flag[1] = 0;
        }
        else
        {
-            if( c[i]->wipe_status == 0 )
-            {
-                strncpy( exclamation_flag, " ", 1 );
-                exclamation_flag[1] = 0;
-            }
+            strncpy( exclamation_flag, " ", 1 );
+            exclamation_flag[1] = 0;
        }

        /* Device name, strip any prefixed /dev/.. leaving up to 6 right justified
@@ -691,25 +720,15 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
        idx_src = strlen( c[i]->device_name );
        idx_src--;

-        while( idx_dest >= 0 )
-        {
-            /* if the device name contains a / start prefixing spaces */
-            if( c[i]->device_name[idx_src] == '/' )
-            {
-                device[idx_dest--] = ' ';
-                continue;
-            }
-            if( idx_src >= 0 )
-            {
-                device[idx_dest--] = c[i]->device_name[idx_src--];
-            }
-        }
+        nwipe_strip_path( device, c[i]->device_name );
+
        nwipe_log( NWIPE_LOG_NOTIMESTAMP,
-                   "%s %s |  %10llu |           %10llu |",
+                   "%s %s |  %10llu |           %10llu |           %10llu",
                   exclamation_flag,
                   device,
                   c[i]->pass_errors,
-                   c[i]->verify_errors );
+                   c[i]->verify_errors,
+                   c[i]->fsyncdata_errors );
    }

    nwipe_log( NWIPE_LOG_NOTIMESTAMP,
@@ -728,44 +747,28 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
    nwipe_log( NWIPE_LOG_NOTIMESTAMP, "" );
    nwipe_log( NWIPE_LOG_NOTIMESTAMP,
               "********************************* Drive Status *********************************" );
-    nwipe_log( NWIPE_LOG_NOTIMESTAMP, "! Device | Status | Thru-put | HH:MM:SS | Model/Serial Number" );
+    nwipe_log( NWIPE_LOG_NOTIMESTAMP, "!   Device | Status | Thru-put | HH:MM:SS | Model/Serial Number" );
    nwipe_log( NWIPE_LOG_NOTIMESTAMP,
               "--------------------------------------------------------------------------------" );
    /* Example layout:
-     *                                "!    sdv |--FAIL--|  120MB/s | 01:22:01 | WD6788.8488YNHj/ZX677888388-N       "
-     * ); "     sdv | Erased |  120MB/s | 01:25:04 | WD6784.8488JKGG/ZX677888388-N       " ); "     sdv | Erased |
+     *    "!     sdb |--FAIL--|  120MB/s | 01:22:01 | WD6788.8488YNHj/ZX677888388-N       "
+     * ); "      sdc | Erased |  120MB/s | 01:25:04 | WD6784.8488JKGG/ZX677888388-N       " ); "     sdv | Erased |
     * 120MB/s | 01:19:07 | WD6788.848HHDDR/ZX677888388-N       " ); End of Example layout */

    for( i = 0; i < nwipe_selected; i++ )
    {
-        /* Device name, strip any prefixed /dev/.. leaving up to 6 right justified
-         * characters eg "   sda", prefixed with space to 6 characters, note that
+        /* Device name, strip any prefixed /dev/.. leaving up to 8 right justified
+         * characters eg "   sda", prefixed with space to 8 characters, note that
         * we are processing the strings right to left */

-        idx_dest = 6;
-        device[idx_dest--] = 0;
-        idx_src = strlen( c[i]->device_name );
-        idx_src--;
+        nwipe_strip_path( device, c[i]->device_name );

-        while( idx_dest >= 0 )
-        {
-            /* if the device name contains a / start prefixing spaces */
-            if( c[i]->device_name[idx_src] == '/' )
-            {
-                device[idx_dest--] = ' ';
-                continue;
-            }
-            if( idx_src >= 0 )
-            {
-                device[idx_dest--] = c[i]->device_name[idx_src--];
-            }
-        }
        extern int user_abort;

        /* Any errors ? if so set the exclamation_flag and fail message,
         * All status messages should be eight characters EXACTLY !
         */
-        if( c[i]->result < 0 )
+        if( c[i]->pass_errors != 0 || c[i]->verify_errors != 0 || c[i]->fsyncdata_errors != 0 )
        {
            strncpy( exclamation_flag, "!", 1 );
            exclamation_flag[1] = 0;
@@ -775,44 +778,32 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
        }
        else
        {
-
-            if( c[i]->pass_errors != 0 || c[i]->verify_errors != 0 )
+            if( c[i]->wipe_status == 0 )
            {
-                strncpy( exclamation_flag, "!", 1 );
+                strncpy( exclamation_flag, " ", 1 );
                exclamation_flag[1] = 0;

-                strncpy( status, "-FAILED-", 8 );
+                strncpy( status, " Erased ", 8 );
                status[8] = 0;
            }
            else
            {
-                if( c[i]->wipe_status == 0 )
+                if( user_abort == 1 )
                {
-                    strncpy( exclamation_flag, " ", 1 );
+                    strncpy( exclamation_flag, "!", 1 );
                    exclamation_flag[1] = 0;

-                    strncpy( status, " Erased ", 8 );
+                    strncpy( status, "UABORTED", 8 );
                    status[8] = 0;
                }
                else
                {
-                    if( user_abort == 1 )
-                    {
-                        strncpy( exclamation_flag, "!", 1 );
-                        exclamation_flag[1] = 0;
+                    /* If this ever happens, there is a bug ! */
+                    strncpy( exclamation_flag, " ", 1 );
+                    exclamation_flag[1] = 0;

-                        strncpy( status, "UABORTED", 8 );
-                        status[8] = 0;
-                    }
-                    else
-                    {
-                        /* If this ever happens, there is a bug ! */
-                        strncpy( exclamation_flag, " ", 1 );
-                        exclamation_flag[1] = 0;
-
-                        strncpy( status, "INSANITY", 8 );
-                        status[8] = 0;
-                    }
+                    strncpy( status, "INSANITY", 8 );
+                    status[8] = 0;
                }
            }
        }
@@ -868,7 +859,7 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
    /* Determine the size of throughput so that the correct nomenclature can be used */
    Determine_C_B_nomenclature( total_throughput, total_throughput_string, 13 );

-    /* Blank abreviations used in summary table B=blank, NB=no blank */
+    /* Blank abbreviations used in summary table B=blank, NB=no blank */
    if( nwipe_options.noblank )
    {
        strcpy( blank, "NB" );
@@ -878,7 +869,7 @@ void nwipe_log_summary( nwipe_context_t** ptr, int nwipe_selected )
        strcpy( blank, "B" );
    }

-    /* Verify abreviations used in summary table */
+    /* Verify abbreviations used in summary table */
    switch( nwipe_options.verify )
    {
        case NWIPE_VERIFY_NONE:
@@ -985,3 +976,32 @@ void convert_seconds_to_hours_minutes_seconds( u64 total_seconds, int* hours, in
        }
    }
 }
+
+int nwipe_strip_path( char* output, char* input )
+{
+    /* Take the input string, say "/dev/sda" and remove the "/dev/", prefix the result
+     * with 'length' spaces. So if length=8 and input=/dev/sda, output will
+     * be "     sda", a string 8 characters long right justified with spaces.
+     */
+    int idx_dest;
+    int idx_src;
+    idx_dest = 8;
+    // idx_dest = length;
+    output[idx_dest--] = 0;
+    idx_src = strlen( input );
+    idx_src--;
+
+    while( idx_dest >= 0 )
+    {
+        /* if the device name contains a / start prefixing spaces */
+        if( input[idx_src] == '/' )
+        {
+            output[idx_dest--] = ' ';
+            continue;
+        }
+        if( idx_src >= 0 )
+        {
+            output[idx_dest--] = input[idx_src--];
+        }
+    }
+}
--- a/src/logging.h
+++ b/src/logging.h
@@ -47,5 +47,6 @@ int nwipe_log_sysinfo();
 void nwipe_log_summary( nwipe_context_t**, int );  // This produces the wipe status table on exit
 void Determine_C_B_nomenclature( u64, char*, int );
 void convert_seconds_to_hours_minutes_seconds( u64, int*, int*, int* );
+int nwipe_strip_path( char*, char* );

 #endif /* LOGGING_H_ */
--- a/src/method.c
+++ b/src/method.c
@@ -63,8 +63,10 @@ const char* nwipe_dodshort_label = "DoD Short";
 const char* nwipe_gutmann_label = "Gutmann Wipe";
 const char* nwipe_ops2_label = "RCMP TSSIT OPS-II";
 const char* nwipe_random_label = "PRNG Stream";
-const char* nwipe_zero_label = "Zero Fill";
-const char* nwipe_verify_label = "Verify Blank";
+const char* nwipe_zero_label = "Fill With Zeros";
+const char* nwipe_one_label = "Fill With Ones";
+const char* nwipe_verify_zero_label = "Verify Zeros (0x00)";
+const char* nwipe_verify_one_label = "Verify Ones  (0xFF)";
 const char* nwipe_is5enh_label = "HMG IS5 Enhanced";

 const char* nwipe_unknown_label = "Unknown Method (FIXME)";
@@ -100,9 +102,17 @@ const char* nwipe_method_label( void* method )
    {
        return nwipe_zero_label;
    }
-    if( method == &nwipe_verify )
+    if( method == &nwipe_one )
    {
-        return nwipe_verify_label;
+        return nwipe_one_label;
+    }
+    if( method == &nwipe_verify_zero )
+    {
+        return nwipe_verify_zero_label;
+    }
+    if( method == &nwipe_verify_one )
+    {
+        return nwipe_verify_one_label;
    }
    if( method == &nwipe_is5enh )
    {
@@ -147,10 +157,73 @@ void* nwipe_zero( void* ptr )
    return NULL;
 } /* nwipe_zero */

-void* nwipe_verify( void* ptr )
+void* nwipe_one( void* ptr )
 {
    /**
-     * Fill the device with zeroes.
+     * Fill the device with ones.
+     */
+
+    nwipe_context_t* c;
+    c = (nwipe_context_t*) ptr;
+
+    /* get current time at the start of the wipe  */
+    time( &c->start_time );
+
+    /* set wipe in progress flag for GUI */
+    c->wipe_status = 1;
+
+    /* setup for a zero-fill. */
+
+    char onefill[1] = { '\xFF' };
+    nwipe_pattern_t patterns[] = { { 1, &onefill[0] },  // pass 1: 1s
+                                   { 0, NULL } };
+
+    /* Run the method. */
+    c->result = nwipe_runmethod( c, patterns );
+
+    /* Finished. Set the wipe_status flag so that the GUI knows */
+    c->wipe_status = 0;
+
+    /* get current time at the end of the wipe  */
+    time( &c->end_time );
+
+    return NULL;
+} /* nwipe_one */
+
+void* nwipe_verify_zero( void* ptr )
+{
+    /**
+     * Verify the device is full of zeros.
+     */
+
+    nwipe_context_t* c;
+    c = (nwipe_context_t*) ptr;
+
+    /* get current time at the start of the wipe  */
+    time( &c->start_time );
+
+    /* set wipe in progress flag for GUI */
+    c->wipe_status = 1;
+
+    /* Do nothing because nwipe_runmethod appends a zero-fill. */
+    nwipe_pattern_t patterns[] = { { 0, NULL } };
+
+    /* Run the method. */
+    c->result = nwipe_runmethod( c, patterns );
+
+    /* Finished. Set the wipe_status flag so that the GUI knows */
+    c->wipe_status = 0;
+
+    /* get current time at the end of the wipe  */
+    time( &c->end_time );
+
+    return NULL;
+} /* nwipe_verify zeros */
+
+void* nwipe_verify_one( void* ptr )
+{
+    /**
+     * Verify the device is full of ones.
     */

    nwipe_context_t* c;
@@ -335,18 +408,6 @@ void* nwipe_gutmann( void* ptr )
    /* set wipe in progress flag for GUI */
    c->wipe_status = 1;

-    /* A result buffer. */
-    int r;
-
-    /* The number of patterns in the Guttman Wipe, also used to index the 'patterns' array. */
-    int i = 35;
-
-    /* An index into the 'book' array. */
-    int j;
-
-    /* The N-th element that has not been used. */
-    int n;
-
    /* Define the Gutmann method. */
    nwipe_pattern_t book[] = { { -1, "" },  // Random pass.
                               { -1, "" },  // Random pass.
@@ -389,11 +450,10 @@ void* nwipe_gutmann( void* ptr )
    nwipe_pattern_t patterns[36];

    /* An entropy buffer. */
-    u16 s[i];
+    u16 s[27];

    /* Load the array with random characters. */
-    r = read( c->entropy_fd, &s, sizeof( s ) );
-
+    ssize_t r = read( c->entropy_fd, &s, sizeof( s ) );
    if( r != sizeof( s ) )
    {
        r = errno;
@@ -413,14 +473,19 @@ void* nwipe_gutmann( void* ptr )
        }
    }

-    while( --i >= 0 )
+    // First 4 random passes
+    for( int i = 0; i <= 3; ++i )
+    {
+        patterns[i] = book[i];
+    }
+    // Middle 27 passes in random order
+    for( int i = 26; i >= 0; --i )
    {
-
        /* Get a random integer that is less than the first index 'i'. */
-        n = (int) ( (double) ( s[i] ) / (double) ( 0x0000FFFF + 1 ) * (double) ( i + 1 ) );
+        int n = (int) ( (double) ( s[i] ) / (double) ( 0x0000FFFF + 1 ) * (double) ( i + 1 ) );

        /* Initialize the secondary index. */
-        j = -1;
+        int j = 3;

        while( n-- >= 0 )
        {
@@ -435,11 +500,16 @@ void* nwipe_gutmann( void* ptr )
        }

        /* Copy the element. */
-        patterns[i] = book[j];
+        patterns[i + 4] = book[j];

        /* Mark this element as having been used. */
        book[j].length = 0;
    }
+    // Last 4 random passes
+    for( int i = 31; i <= 34; ++i )
+    {
+        patterns[i] = book[i];
+    }

    /* Ensure that the array is terminated. */
    patterns[35].length = 0;
@@ -701,6 +771,9 @@ int nwipe_runmethod( nwipe_context_t* c, nwipe_pattern_t* patterns )
    /* The zero-fill pattern for the final pass of most methods. */
    nwipe_pattern_t pattern_zero = { 1, "\x00" };

+    /* The one-fill pattern for verification of the ones fill */
+    nwipe_pattern_t pattern_one = { 1, "\xFF" };
+
    /* Create the PRNG state buffer. */
    c->prng_seed.length = NWIPE_KNOB_PRNG_STATE_LENGTH;
    c->prng_seed.s = malloc( c->prng_seed.length );
@@ -728,10 +801,8 @@ int nwipe_runmethod( nwipe_context_t* c, nwipe_pattern_t* patterns )
    /* For the selected method, calculate the correct round_size value (for correct percentage calculation) */
    calculate_round_size( c );

-    c->result = c->round_size;
-
-    /* If only verifing then the round size is the device size */
-    if( nwipe_options.method == &nwipe_verify )
+    /* If only verifying then the round size is the device size */
+    if( nwipe_options.method == &nwipe_verify_zero || nwipe_options.method == &nwipe_verify_one )
    {
        c->round_size = c->device_size;
    }
@@ -994,9 +1065,9 @@ int nwipe_runmethod( nwipe_context_t* c, nwipe_pattern_t* patterns )

    } /* final ops2 */

-    else if( nwipe_options.method == &nwipe_verify )
+    else if( nwipe_options.method == &nwipe_verify_zero )
    {
-        nwipe_log( NWIPE_LOG_NOTICE, "Verifying that %s is empty", c->device_name );
+        nwipe_log( NWIPE_LOG_NOTICE, "Verifying that %s is zeroed", c->device_name );

        /* Verify the final zero pass. */
        c->pass_type = NWIPE_PASS_VERIFY;
@@ -1010,11 +1081,36 @@ int nwipe_runmethod( nwipe_context_t* c, nwipe_pattern_t* patterns )
        }
        if( c->verify_errors == 0 )
        {
-            nwipe_log( NWIPE_LOG_NOTICE, "[SUCCESS] Verified that %s is empty.", c->device_name );
+            nwipe_log( NWIPE_LOG_NOTICE, "[SUCCESS] Verified that %s is Zeroed.", c->device_name );
        }
        else
        {
-            nwipe_log( NWIPE_LOG_ERROR, "[FAILURE] %s is not empty .", c->device_name );
+            nwipe_log( NWIPE_LOG_ERROR, "[FAILURE] %s has not been Zeroed .", c->device_name );
+        }
+
+    } /* verify */
+
+    else if( nwipe_options.method == &nwipe_verify_one )
+    {
+        nwipe_log( NWIPE_LOG_NOTICE, "Verifying that %s is Ones (0xFF)", c->device_name );
+
+        /* Verify the final ones pass. */
+        c->pass_type = NWIPE_PASS_VERIFY;
+        r = nwipe_static_verify( c, &pattern_one );
+        c->pass_type = NWIPE_PASS_NONE;
+
+        /* Check for a fatal error. */
+        if( r < 0 )
+        {
+            return r;
+        }
+        if( c->verify_errors == 0 )
+        {
+            nwipe_log( NWIPE_LOG_NOTICE, "[SUCCESS] Verified that %s is full of ones (0xFF).", c->device_name );
+        }
+        else
+        {
+            nwipe_log( NWIPE_LOG_ERROR, "[FAILURE] %s is not full of ones (0xFF).", c->device_name );
        }

    } /* verify */
@@ -1206,7 +1302,7 @@ void calculate_round_size( nwipe_context_t* c )
                c->round_size += c->device_size;
            }

-            /* As no final zero blanking pass is permitted by this standard reduce round size if it's seelected */
+            /* As no final zero blanking pass is permitted by this standard reduce round size if it's selected */
            if( nwipe_options.noblank == 0 )
            {
                /* Reduce for blanking pass */
--- a/src/method.h
+++ b/src/method.h
@@ -51,7 +51,9 @@ void* nwipe_ops2( void* ptr );
 void* nwipe_is5enh( void* ptr );
 void* nwipe_random( void* ptr );
 void* nwipe_zero( void* ptr );
-void* nwipe_verify( void* ptr );
+void* nwipe_one( void* ptr );
+void* nwipe_verify_zero( void* ptr );
+void* nwipe_verify_one( void* ptr );

 void calculate_round_size( nwipe_context_t* );

--- a/src/nwipe.c
+++ b/src/nwipe.c
@@ -41,6 +41,7 @@
 #include "device.h"
 #include "logging.h"
 #include "gui.h"
+#include "temperature.h"

 #include <sys/ioctl.h> /* FIXME: Twice Included */
 #include <sys/shm.h>
@@ -60,9 +61,17 @@ int main( int argc, char** argv )
    int nwipe_enumerated;  // The number of contexts that have been enumerated.
    int nwipe_error = 0;  // An error counter.
    int nwipe_selected = 0;  // The number of contexts that have been selected.
+    int any_threads_still_running;  // used in wipe thread cancellation wait loop
+    int thread_timeout_counter;  // timeout thread cancellation after THREAD_CANCELLATION_TIMEOUT seconds
    pthread_t nwipe_gui_thread = 0;  // The thread ID of the GUI thread.
    pthread_t nwipe_sigint_thread;  // The thread ID of the sigint handler.

+    char modprobe_command[] = "modprobe %s";
+    char modprobe_command2[] = "/sbin/modprobe %s";
+    char modprobe_command3[] = "/usr/sbin/modprobe %s";
+    char module_shortform[50];
+    char final_cmd_modprobe[sizeof( modprobe_command ) + sizeof( module_shortform )];
+
    /* The entropy source file handle. */
    int nwipe_entropy;

@@ -91,7 +100,7 @@ int main( int argc, char** argv )
    /* Initialise, flag indicating whether a wipe has actually started or not 0=no, 1=yes */
    global_wipe_status = 0;

-    /* Initialise flags that indicates whether a fatal or non fatal error occured on ANY drive */
+    /* Initialise flags that indicate whether a fatal or non fatal error occurred on ANY drive */
    int fatal_errors_flag = 0;
    int non_fatal_errors_flag = 0;

@@ -107,11 +116,18 @@ int main( int argc, char** argv )

    /* Parse command line options. */
    nwipe_optind = nwipe_options_parse( argc, argv );
+
    if( nwipe_optind == argc )
    {
        /* File names were not given by the user.  Scan for devices. */
        nwipe_enumerated = nwipe_device_scan( &c1 );

+        if( terminate_signal == 1 )
+        {
+            cleanup();
+            exit( 1 );
+        }
+
        if( nwipe_enumerated == 0 )
        {
            nwipe_log( NWIPE_LOG_INFO,
@@ -202,6 +218,53 @@ int main( int argc, char** argv )
        pthread_create( &nwipe_sigint_thread, &pthread_attr, signal_hand, &nwipe_thread_data_ptr );
    }

+    /* Makesure the drivetemp module is loaded, else drives hwmon entries won't appear in /sys/class/hwmon */
+    final_cmd_modprobe[0] = 0;
+
+    /* The kernel module we are going to load */
+    strcpy( module_shortform, "drivetemp" );
+
+    /* Determine whether we can access modprobe, required if the PATH environment is not setup ! (Debian sid 'su' as
+     * opposed to 'su -' */
+
+    if( system( "which modprobe > /dev/null 2>&1" ) )
+    {
+        if( system( "which /sbin/modprobe > /dev/null 2>&1" ) )
+        {
+            if( system( "which /usr/sbin/modprobe > /dev/null 2>&1" ) )
+            {
+                nwipe_log( NWIPE_LOG_WARNING, "modprobe command not found. Install kmod package (modprobe)) !" );
+                nwipe_log( NWIPE_LOG_WARNING, "Most temperature monitoring may be unavailable as module drivetemp" );
+                nwipe_log( NWIPE_LOG_WARNING, "could not be loaded. drivetemp is not available on kernels < v5.5" );
+            }
+            else
+            {
+                sprintf( final_cmd_modprobe, modprobe_command3, module_shortform );
+            }
+        }
+        else
+        {
+            sprintf( final_cmd_modprobe, modprobe_command2, module_shortform );
+        }
+    }
+    else
+    {
+        sprintf( final_cmd_modprobe, modprobe_command, module_shortform );
+    }
+
+    /* load the drivetemp module */
+    if( system( final_cmd_modprobe ) != 0 )
+    {
+        nwipe_log( NWIPE_LOG_WARNING, "hwmon: Unable to load module drivetemp, temperatures may be unavilable." );
+        nwipe_log( NWIPE_LOG_WARNING, "hwmon: It's possible the drivetemp software isn't modular but built-in" );
+        nwipe_log( NWIPE_LOG_WARNING, "hwmon: to the kernel, as is the case with ShredOS.x86_64 in which case" );
+        nwipe_log( NWIPE_LOG_WARNING, "hwmon: the temperatures will actually be available despite this issue." );
+    }
+    else
+    {
+        nwipe_log( NWIPE_LOG_NOTICE, "hwmon: Module drivetemp loaded, drive temperatures available" );
+    }
+
    /* A context struct for each device has already been created. */
    /* Now set specific nwipe options */
    for( i = 0; i < nwipe_enumerated; i++ )
@@ -223,12 +286,21 @@ int main( int argc, char** argv )
            /* The user must manually select devices. */
            c1[i]->select = NWIPE_SELECT_FALSE;
        }
+
+        /* Initialise temperature variables for device */
+        nwipe_init_temperature( c1[i] );
+        if( nwipe_options.verbose )
+        {
+            nwipe_log( NWIPE_LOG_NOTICE, "hwmon: Device %s hwmon path = %s", c1[i]->device_name, c1[i]->temp1_path );
+        }
+
+        nwipe_update_temperature( c1[i] );
    }

    /* Check for initialization errors. */
    if( nwipe_error )
    {
-        nwipe_log( NWIPE_LOG_ERROR, "Initialization eror %i\n", nwipe_error );
+        nwipe_log( NWIPE_LOG_ERROR, "Initialization error %i\n", nwipe_error );
        cleanup();
        return -1;
    }
@@ -271,6 +343,9 @@ int main( int argc, char** argv )
        {
            nwipe_selected += 1;
        }
+
+        /* Initialise the wipe result value */
+        c1[i]->result = 0;
    }

    /* Pass the number selected to the struct for other threads */
@@ -422,7 +497,7 @@ int main( int argc, char** argv )
            if( c2[i]->device_size == 0 )
            {
                nwipe_log( NWIPE_LOG_ERROR,
-                           "%s, sect/blk/dev %llu/%i/%llu",
+                           "%s, sect/blk/dev %i/%i/%llu",
                           c2[i]->device_name,
                           c2[i]->device_sector_size,
                           c2[i]->device_block_size,
@@ -433,7 +508,7 @@ int main( int argc, char** argv )
            else
            {
                nwipe_log( NWIPE_LOG_NOTICE,
-                           "%s, sect/blk/dev %llu/%i/%llu",
+                           "%s, sect/blk/dev %i/%i/%llu",
                           c2[i]->device_name,
                           c2[i]->device_sector_size,
                           c2[i]->device_block_size,
@@ -521,7 +596,6 @@ int main( int argc, char** argv )
            if( nwipe_options.verbose )
            {
                nwipe_log( NWIPE_LOG_INFO, "Requesting wipe thread cancellation for %s", c2[i]->device_name );
-                nwipe_log( NWIPE_LOG_INFO, "Please wait.." );
            }
            pthread_cancel( c2[i]->thread );
        }
@@ -543,9 +617,12 @@ int main( int argc, char** argv )
        {
            nwipe_log( NWIPE_LOG_WARNING, "main()>pthread_join():Error when waiting for GUI thread to cancel." );
        }
-        if( nwipe_options.verbose )
+        else
        {
-            nwipe_log( NWIPE_LOG_INFO, "GUI compute_stats thread has been cancelled" );
+            if( nwipe_options.verbose )
+            {
+                nwipe_log( NWIPE_LOG_INFO, "GUI compute_stats thread has been cancelled" );
+            }
        }
    }

@@ -556,26 +633,86 @@ int main( int argc, char** argv )
    }

    /* Now join the wipe threads and wait until they have terminated */
-    for( i = 0; i < nwipe_selected; i++ )
+    any_threads_still_running = 1;
+    thread_timeout_counter = THREAD_CANCELLATION_TIMEOUT;
+    while( any_threads_still_running )
    {
-
-        if( c2[i]->thread )
+        /* quit waiting if we've tried 'thread_timeout_counter' times */
+        if( thread_timeout_counter == 0 )
        {
-            /* Joins the thread and waits for completion before continuing */
-            r = pthread_join( c2[i]->thread, NULL );
-            if( r != 0 )
-            {
-                nwipe_log( NWIPE_LOG_WARNING, "main()>pthread_join():Error when waiting for wipe thread to cancel." );
-            }
-            c2[i]->thread = 0; /* Zero the thread so we know it's been cancelled */
+            break;
+        }

-            if( nwipe_options.verbose )
+        any_threads_still_running = 0;
+        for( i = 0; i < nwipe_selected; i++ )
+        {
+            if( c2[i]->thread )
            {
-                nwipe_log( NWIPE_LOG_INFO, "Wipe thread for device %s has been cancelled", c2[i]->device_name );
-            }
+                printf( "\nWaiting for wipe thread to cancel for %s\n", c2[i]->device_name );

-            /* Close the device file descriptor. */
-            close( c2[i]->device_fd );
+                /* Joins the thread and waits for completion before continuing */
+                r = pthread_join( c2[i]->thread, NULL );
+                if( r != 0 )
+                {
+                    nwipe_log( NWIPE_LOG_ERROR,
+                               "Error joining the wipe thread when waiting for thread to cancel.",
+                               c2[i]->device_name );
+
+                    if( r == EDEADLK )
+                    {
+                        nwipe_log( NWIPE_LOG_ERROR,
+                                   "Error joining the wipe thread: EDEADLK: Deadlock detected.",
+                                   c2[i]->device_name );
+                    }
+                    else
+                    {
+                        if( r == EINVAL )
+                        {
+                            nwipe_log( NWIPE_LOG_ERROR,
+                                       "Error joining the wipe thread: %s EINVAL: thread is not joinable.",
+                                       c2[i]->device_name );
+                        }
+                        else
+                        {
+                            if( r == ESRCH )
+                            {
+                                nwipe_log( NWIPE_LOG_ERROR,
+                                           "Error joining the wipe thread: %s ESRCH: no matching thread found",
+                                           c2[i]->device_name );
+                            }
+                        }
+                    }
+
+                    any_threads_still_running = 1;
+                }
+                else
+                {
+                    c2[i]->thread = 0; /* Zero the thread so we know it's been cancelled */
+
+                    if( nwipe_options.verbose )
+                    {
+                        nwipe_log( NWIPE_LOG_INFO, "Wipe thread for device %s has terminated", c2[i]->device_name );
+                    }
+
+                    /* Close the device file descriptor. */
+                    close( c2[i]->device_fd );
+                }
+            }
+        }
+        thread_timeout_counter--;
+        sleep( 1 );
+    }
+    if( nwipe_options.verbose )
+    {
+        for( i = 0; i < nwipe_selected; i++ )
+        {
+            nwipe_log( NWIPE_LOG_DEBUG,
+                       "Status: %s, result=%d, pass_errors=%llu, verify_errors=%llu, fsync_errors=%llu",
+                       c2[i]->device_name,
+                       c2[i]->result,
+                       c2[i]->pass_errors,
+                       c2[i]->verify_errors,
+                       c2[i]->fsyncdata_errors );
        }
    }

@@ -592,25 +729,35 @@ int main( int argc, char** argv )
    {
        for( i = 0; i < nwipe_selected; i++ )
        {
-            /* Check for non-fatal errors. */
-            if( c2[i]->result > 0 )
+            /* Check for errors. */
+            if( c2[i]->result != 0 || c2[i]->pass_errors != 0 || c2[i]->verify_errors != 0
+                || c2[i]->fsyncdata_errors != 0 )
            {
-                nwipe_log( NWIPE_LOG_FATAL, "Nwipe exited with non fatal errors on device = %s\n", c2[i]->device_name );
+                /* If the run_method ever returns anything other than zero then makesure there is at least one pass
+                 * error This is so that the log summary tables correctly show a failure when one occurs as it only
+                 * shows pass, verification and fdatasync errors. */
+                if( c2[i]->result != 0 )
+                {
+                    if( c2[i]->pass_errors == 0 )
+                    {
+                        c2[i]->pass_errors = 1;
+                    }
+                }
+
+                nwipe_log( NWIPE_LOG_FATAL,
+                           "Nwipe exited with errors on device = %s, see log for specific error\n",
+                           c2[i]->device_name );
+                nwipe_log( NWIPE_LOG_DEBUG,
+                           "Status: %s, result=%d, pass_errors=%llu, verify_errors=%llu, fsync_errors=%llu",
+                           c2[i]->device_name,
+                           c2[i]->result,
+                           c2[i]->pass_errors,
+                           c2[i]->verify_errors,
+                           c2[i]->fsyncdata_errors );
                non_fatal_errors_flag = 1;
                return_status = 1;
            }
        }
-
-        for( i = 0; i < nwipe_selected; i++ )
-        {
-            /* Check for fatal errors. */
-            if( c2[i]->result < 0 )
-            {
-                nwipe_log( NWIPE_LOG_ERROR, "Nwipe exited with fatal errors on device = %s\n", c2[i]->device_name );
-                fatal_errors_flag = 1;
-                return_status = -1;
-            }
-        }
    }

    /* Generate and send the drive status summary to the log */
--- a/src/nwipe.h
+++ b/src/nwipe.h
@@ -76,13 +76,6 @@ extern int errno;
 /* 0=wipe not yet started, 1=wipe has been started by the user */
 extern int global_wipe_status;

-/* Global array to hold log values to print when logging to STDOUT */
-/* char **log_lines;
-int log_current_element = 0;
-int log_elements_allocated = 0;
-int log_elements_displayed = 0;
-pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER; */
-
 /* Ncurses headers. */
 #ifdef NCURSES_IN_SUBDIR
 #include <ncurses/ncurses.h>
@@ -113,6 +106,8 @@ typedef unsigned char u8;
 #define BLKBSZSET _IOW( 0x12, 113, size_t )
 #define BLKGETSIZE64 _IOR( 0x12, 114, sizeof( u64 ) )

+#define THREAD_CANCELLATION_TIMEOUT 10
+
 /* This is required for ioctl FDFLUSH. */
 #include <linux/fd.h>

--- a/src/options.c
+++ b/src/options.c
@@ -40,6 +40,7 @@ int nwipe_options_parse( int argc, char** argv )

    extern nwipe_prng_t nwipe_twister;
    extern nwipe_prng_t nwipe_isaac;
+    extern nwipe_prng_t nwipe_isaac64;

    /* The getopt() result holder. */
    int nwipe_opt;
@@ -53,7 +54,7 @@ int nwipe_options_parse( int argc, char** argv )
    int i;

    /* The list of acceptable short options. */
-    char nwipe_options_short[] = "Vvhl:m:p:r:e:";
+    char nwipe_options_short[] = "Vvhl:m:p:qr:e:";

    /* The list of acceptable long options. */
    static struct option nwipe_options_long[] = {
@@ -93,10 +94,13 @@ int nwipe_options_parse( int argc, char** argv )
        /* Whether to allow signals to interrupt a wipe. */
        { "nosignals", no_argument, 0, 0 },

-        /* Whether to exit after wiping or wait for a keypress. */
+        /* Whether to display the gui. */
        { "nogui", no_argument, 0, 0 },

-        /* A flag to indicate whether the devices whould be opened in sync mode. */
+        /* Whether to anonymize the serial numbers. */
+        { "quiet", no_argument, 0, 'q' },
+
+        /* A flag to indicate whether the devices would be opened in sync mode. */
        { "sync", required_argument, 0, 0 },

        /* Verify that wipe patterns are being written to the device. */
@@ -115,13 +119,14 @@ int nwipe_options_parse( int argc, char** argv )
    nwipe_options.autonuke = 0;
    nwipe_options.autopoweroff = 0;
    nwipe_options.method = &nwipe_dodshort;
-    nwipe_options.prng = &nwipe_twister;
+    nwipe_options.prng = ( sizeof( unsigned long int ) >= 8 ) ? &nwipe_isaac64 : &nwipe_isaac;
    nwipe_options.rounds = 1;
    nwipe_options.noblank = 0;
    nwipe_options.nousb = 0;
    nwipe_options.nowait = 0;
    nwipe_options.nosignals = 0;
    nwipe_options.nogui = 0;
+    nwipe_options.quiet = 0;
    nwipe_options.sync = DEFAULT_SYNC_RATE;
    nwipe_options.verbose = 0;
    nwipe_options.verify = NWIPE_VERIFY_LAST;
@@ -276,9 +281,21 @@ int nwipe_options_parse( int argc, char** argv )
                    break;
                }

-                if( strcmp( optarg, "verify" ) == 0 )
+                if( strcmp( optarg, "one" ) == 0 )
                {
-                    nwipe_options.method = &nwipe_verify;
+                    nwipe_options.method = &nwipe_one;
+                    break;
+                }
+
+                if( strcmp( optarg, "verify_zero" ) == 0 )
+                {
+                    nwipe_options.method = &nwipe_verify_zero;
+                    break;
+                }
+
+                if( strcmp( optarg, "verify_one" ) == 0 )
+                {
+                    nwipe_options.method = &nwipe_verify_one;
                    break;
                }

@@ -359,10 +376,21 @@ int nwipe_options_parse( int argc, char** argv )
                    break;
                }

+                if( strcmp( optarg, "isaac64" ) == 0 )
+                {
+                    nwipe_options.prng = &nwipe_isaac64;
+                    break;
+                }
+
                /* Else we do not know this PRNG. */
                fprintf( stderr, "Error: Unknown prng '%s'.\n", optarg );
                exit( EINVAL );

+            case 'q': /* Anonymize serial numbers */
+
+                nwipe_options.quiet = 1;
+                break;
+
            case 'r': /* Rounds option. */

                if( sscanf( optarg, " %i", &nwipe_options.rounds ) != 1 || nwipe_options.rounds < 1 )
@@ -401,6 +429,7 @@ void nwipe_options_log( void )
 {
    extern nwipe_prng_t nwipe_twister;
    extern nwipe_prng_t nwipe_isaac;
+    extern nwipe_prng_t nwipe_isaac64;

    /**
     *  Prints a manifest of options to the log.
@@ -460,11 +489,19 @@ void nwipe_options_log( void )
        }
        else
        {
-            nwipe_log( NWIPE_LOG_NOTICE, "  prng     = Undefined" );
+            if( nwipe_options.prng == &nwipe_isaac64 )
+            {
+                nwipe_log( NWIPE_LOG_NOTICE, "  prng     = Isaac64" );
+            }
+            else
+            {
+                nwipe_log( NWIPE_LOG_NOTICE, "  prng     = Undefined" );
+            }
        }
    }

    nwipe_log( NWIPE_LOG_NOTICE, "  method   = %s", nwipe_method_label( nwipe_options.method ) );
+    nwipe_log( NWIPE_LOG_NOTICE, "  quiet    = %i", nwipe_options.quiet );
    nwipe_log( NWIPE_LOG_NOTICE, "  rounds   = %i", nwipe_options.rounds );
    nwipe_log( NWIPE_LOG_NOTICE, "  sync     = %i", nwipe_options.sync );

@@ -529,9 +566,14 @@ void display_help()
    puts( "                          ops2                   - RCMP TSSIT OPS-II" );
    puts( "                          random / prng / stream - PRNG Stream" );
    puts( "                          zero / quick           - Overwrite with zeros" );
-    puts( "                          verify                 - Verifies disk is zero filled\n" );
+    puts( "                          one                    - Overwrite with ones (0xFF)" );
+    puts( "                          verify_zero            - Verifies disk is zero filled" );
+    puts( "                          verify_one             - Verifies disk is 0xFF filled\n" );
    puts( "  -l, --logfile=FILE      Filename to log to. Default is STDOUT\n" );
-    puts( "  -p, --prng=METHOD       PRNG option (mersenne|twister|isaac)\n" );
+    puts( "  -p, --prng=METHOD       PRNG option (mersenne|twister|isaac|isaac64)\n" );
+    puts( "  -q, --quiet             Anonymize logs and the GUI by removing unique data, i.e." );
+    puts( "                          serial numbers, LU WWN Device ID, and SMBIOS/DMI data" );
+    puts( "                          XXXXXX = S/N exists, ????? = S/N not obtainable\n" );
    puts( "  -r, --rounds=NUM        Number of times to wipe the device using the selected" );
    puts( "                          method (default: 1)\n" );
    puts( "      --noblank           Do NOT blank disk after wipe" );
--- a/src/options.h
+++ b/src/options.h
@@ -60,6 +60,7 @@ typedef struct
    char logfile[FILENAME_MAX];  // The filename to log the output to.
    char exclude[MAX_NUMBER_EXCLUDED_DRIVES][MAX_DRIVE_PATH_LENGTH];  // Drives excluded from the search.
    nwipe_prng_t* prng;  // The pseudo random number generator implementation.
+    int quiet;  // Anonymize serial numbers
    int rounds;  // The number of times that the wipe method should be called.
    int sync;  // A flag to indicate whether and how often writes should be sync'd.
    int verbose;  // Make log more verbose
--- a/src/pass.c
+++ b/src/pass.c
@@ -130,6 +130,7 @@ int nwipe_random_verify( nwipe_context_t* c )
        /* FIXME: Is there a better way to handle this? */
        nwipe_perror( errno, __FUNCTION__, "fdatasync" );
        nwipe_log( NWIPE_LOG_WARNING, "Buffer flush failure on '%s'.", c->device_name );
+        c->fsyncdata_errors++;
    }

    /* Reseed the PRNG. */
@@ -264,7 +265,7 @@ int nwipe_random_pass( NWIPE_METHOD_SIGNATURE )
    }

    /* Create the initialised output buffer. Initialised because we don't want memory leaks
-     * to disk in the event of some future undetected bug in a prng or it's implementation ) */
+     * to disk in the event of some future undetected bug in a prng or its implementation. */
    b = calloc( c->device_stat.st_blksize, sizeof( char ) );

    /* Check the memory allocation. */
@@ -406,6 +407,7 @@ int nwipe_random_pass( NWIPE_METHOD_SIGNATURE )
                    nwipe_perror( errno, __FUNCTION__, "fdatasync" );
                    nwipe_log( NWIPE_LOG_WARNING, "Buffer flush failure on '%s'.", c->device_name );
                    nwipe_log( NWIPE_LOG_WARNING, "Wrote %llu bytes on '%s'.", c->pass_done, c->device_name );
+                    c->fsyncdata_errors++;
                    free( b );
                    return -1;
                }
@@ -435,6 +437,7 @@ int nwipe_random_pass( NWIPE_METHOD_SIGNATURE )
        /* FIXME: Is there a better way to handle this? */
        nwipe_perror( errno, __FUNCTION__, "fdatasync" );
        nwipe_log( NWIPE_LOG_WARNING, "Buffer flush failure on '%s'.", c->device_name );
+        c->fsyncdata_errors++;
    }

    /* We're done. */
@@ -529,6 +532,7 @@ int nwipe_static_verify( NWIPE_METHOD_SIGNATURE, nwipe_pattern_t* pattern )
        /* FIXME: Is there a better way to handle this? */
        nwipe_perror( errno, __FUNCTION__, "fdatasync" );
        nwipe_log( NWIPE_LOG_WARNING, "Buffer flush failure on '%s'.", c->device_name );
+        c->fsyncdata_errors++;
    }

    /* Reset the file pointer. */
@@ -823,6 +827,7 @@ int nwipe_static_pass( NWIPE_METHOD_SIGNATURE, nwipe_pattern_t* pattern )
                    nwipe_perror( errno, __FUNCTION__, "fdatasync" );
                    nwipe_log( NWIPE_LOG_WARNING, "Buffer flush failure on '%s'.", c->device_name );
                    nwipe_log( NWIPE_LOG_WARNING, "Wrote %llu bytes on '%s'.", c->pass_done, c->device_name );
+                    c->fsyncdata_errors++;
                    free( b );
                    return -1;
                }
@@ -849,6 +854,7 @@ int nwipe_static_pass( NWIPE_METHOD_SIGNATURE, nwipe_pattern_t* pattern )
        /* FIXME: Is there a better way to handle this? */
        nwipe_perror( errno, __FUNCTION__, "fdatasync" );
        nwipe_log( NWIPE_LOG_WARNING, "Buffer flush failure on '%s'.", c->device_name );
+        c->fsyncdata_errors++;
    }

    /* Release the output buffer. */
--- a/src/prng.c
+++ b/src/prng.c
@@ -24,31 +24,49 @@

 #include "mt19937ar-cok/mt19937ar-cok.h"
 #include "isaac_rand/isaac_rand.h"
+#include "isaac_rand/isaac64.h"

 nwipe_prng_t nwipe_twister = { "Mersenne Twister (mt19937ar-cok)", nwipe_twister_init, nwipe_twister_read };

 nwipe_prng_t nwipe_isaac = { "ISAAC (rand.c 20010626)", nwipe_isaac_init, nwipe_isaac_read };
+nwipe_prng_t nwipe_isaac64 = { "ISAAC-64 (isaac64.c)", nwipe_isaac64_init, nwipe_isaac64_read };

-int nwipe_u32tobuffer( u8* buffer, u32 rand, int len )
+/* Print given number of bytes from unsigned integer number to a byte stream buffer starting with low-endian. */
+static inline void u32_to_buffer( u8* restrict buffer, u32 val, const int len )
 {
-    /*
-     * Print given number of bytes from unsigned integer number to a byte stream buffer starting with low-endian.
-     */
-    int i;
-    u8 c;  // single char
-    if( len > sizeof( u32 ) )
+    for( int i = 0; i < len; ++i )
    {
-        nwipe_log( NWIPE_LOG_FATAL, "Tried to print longer number than the value passed." );
-        len = sizeof( u32 );
+        buffer[i] = ( u8 )( val & 0xFFUL );
+        val >>= 8;
    }
-
-    for( i = 0; i < len; i++ )
+}
+static inline void u64_to_buffer( u8* restrict buffer, u64 val, const int len )
+{
+    for( int i = 0; i < len; ++i )
    {
-        c = rand & 0xFFUL;
-        rand = rand >> 8;
-        buffer[i] = c;
+        buffer[i] = ( u8 )( val & 0xFFULL );
+        val >>= 8;
    }
-    return 0;
+}
+static inline u32 isaac_nextval( randctx* restrict ctx )
+{
+    if( ctx->randcnt == 0 )
+    {
+        isaac( ctx );
+        ctx->randcnt = RANDSIZ;
+    }
+    ctx->randcnt--;
+    return ctx->randrsl[ctx->randcnt];
+}
+static inline u64 isaac64_nextval( rand64ctx* restrict ctx )
+{
+    if( ctx->randcnt == 0 )
+    {
+        isaac64( ctx );
+        ctx->randcnt = RANDSIZ;
+    }
+    ctx->randcnt--;
+    return ctx->randrsl[ctx->randcnt];
 }

 int nwipe_twister_init( NWIPE_PRNG_INIT_SIGNATURE )
@@ -66,23 +84,22 @@ int nwipe_twister_init( NWIPE_PRNG_INIT_SIGNATURE )

 int nwipe_twister_read( NWIPE_PRNG_READ_SIGNATURE )
 {
-    u32 i = 0;
-    u32 ii;
-    u32 words = count / SIZE_OF_TWISTER;  // the values of twister_genrand_int32 is strictly 4 bytes
-    u32 remain = count % SIZE_OF_TWISTER;  // the values of twister_genrand_int32 is strictly 4 bytes
+    u8* restrict bufpos = buffer;
+    size_t words = count / SIZE_OF_TWISTER;  // the values of twister_genrand_int32 is strictly 4 bytes

    /* Twister returns 4-bytes per call, so progress by 4 bytes. */
-    for( ii = 0; ii < words; ++ii )
+    for( size_t ii = 0; ii < words; ++ii )
    {
-        nwipe_u32tobuffer( (u8*) ( buffer + i ), twister_genrand_int32( (twister_state_t*) *state ), SIZE_OF_TWISTER );
-        i = i + SIZE_OF_TWISTER;
+        u32_to_buffer( bufpos, twister_genrand_int32( (twister_state_t*) *state ), SIZE_OF_TWISTER );
+        bufpos += SIZE_OF_TWISTER;
    }

    /* If there is some remainder copy only relevant number of bytes to not
     * overflow the buffer. */
+    const size_t remain = count % SIZE_OF_TWISTER;  // SIZE_OF_TWISTER is strictly 4 bytes
    if( remain > 0 )
    {
-        nwipe_u32tobuffer( (u8*) ( buffer + i ), twister_genrand_int32( (twister_state_t*) *state ), remain );
+        u32_to_buffer( bufpos, twister_genrand_int32( (twister_state_t*) *state ), remain );
    }

    return 0;
@@ -140,30 +157,95 @@ int nwipe_isaac_init( NWIPE_PRNG_INIT_SIGNATURE )

 int nwipe_isaac_read( NWIPE_PRNG_READ_SIGNATURE )
 {
-    u32 i = 0;
-    u32 ii;
-    u32 words = count / SIZE_OF_ISAAC;  // the values of isaac is strictly 4 bytes
-    u32 remain = count % SIZE_OF_ISAAC;  // the values of isaac is strictly 4 bytes
-
    randctx* isaac_state = *state;
+    u8* restrict bufpos = buffer;
+    size_t words = count / SIZE_OF_ISAAC;  // the values of isaac is strictly 4 bytes

    /* Isaac returns 4-bytes per call, so progress by 4 bytes. */
-    for( ii = 0; ii < words; ++ii )
+    for( size_t ii = 0; ii < words; ++ii )
    {
        /* get the next 32bit random number */
-        isaac( isaac_state );
-
-        nwipe_u32tobuffer( (u8*) ( buffer + i ), isaac_state->randrsl[0], SIZE_OF_ISAAC );
-        i = i + SIZE_OF_ISAAC;
+        u32_to_buffer( bufpos, isaac_nextval( isaac_state ), SIZE_OF_ISAAC );
+        bufpos += SIZE_OF_ISAAC;
    }

    /* If there is some remainder copy only relevant number of bytes to not overflow the buffer. */
+    const size_t remain = count % SIZE_OF_ISAAC;  // SIZE_OF_ISAAC is strictly 4 bytes
    if( remain > 0 )
    {
-        /* get the next 32bit random number */
-        isaac( isaac_state );
-
-        nwipe_u32tobuffer( (u8*) ( buffer + i ), isaac_state->randrsl[0], SIZE_OF_ISAAC );
+        u32_to_buffer( bufpos, isaac_nextval( isaac_state ), remain );
+    }
+
+    return 0;
+}
+
+int nwipe_isaac64_init( NWIPE_PRNG_INIT_SIGNATURE )
+{
+    int count;
+    rand64ctx* isaac_state = *state;
+
+    nwipe_log( NWIPE_LOG_NOTICE, "Initialising ISAAC-64 prng" );
+
+    if( *state == NULL )
+    {
+        /* This is the first time that we have been called. */
+        *state = malloc( sizeof( rand64ctx ) );
+        isaac_state = *state;
+
+        /* Check the memory allocation. */
+        if( isaac_state == 0 )
+        {
+            nwipe_perror( errno, __FUNCTION__, "malloc" );
+            nwipe_log( NWIPE_LOG_FATAL, "Unable to allocate memory for the isaac state." );
+            return -1;
+        }
+    }
+
+    /* Take the minimum of the isaac seed size and available entropy. */
+    if( sizeof( isaac_state->randrsl ) < seed->length )
+    {
+        count = sizeof( isaac_state->randrsl );
+    }
+    else
+    {
+        memset( isaac_state->randrsl, 0, sizeof( isaac_state->randrsl ) );
+        count = seed->length;
+    }
+
+    if( count == 0 )
+    {
+        /* Start ISACC without a seed. */
+        rand64init( isaac_state, 0 );
+    }
+    else
+    {
+        /* Seed the ISAAC state with entropy. */
+        memcpy( isaac_state->randrsl, seed->s, count );
+
+        /* The second parameter indicates that randrsl is non-empty. */
+        rand64init( isaac_state, 1 );
+    }
+
+    return 0;
+}
+
+int nwipe_isaac64_read( NWIPE_PRNG_READ_SIGNATURE )
+{
+    rand64ctx* isaac_state = *state;
+    u8* restrict bufpos = buffer;
+    size_t words = count / SIZE_OF_ISAAC64;  // the values of ISAAC-64 is strictly 8 bytes
+
+    for( size_t ii = 0; ii < words; ++ii )
+    {
+        u64_to_buffer( bufpos, isaac64_nextval( isaac_state ), SIZE_OF_ISAAC64 );
+        bufpos += SIZE_OF_ISAAC64;
+    }
+
+    /* If there is some remainder copy only relevant number of bytes to not overflow the buffer. */
+    const size_t remain = count % SIZE_OF_ISAAC64;  // SIZE_OF_ISAAC64 is strictly 8 bytes
+    if( remain > 0 )
+    {
+        u64_to_buffer( bufpos, isaac64_nextval( isaac_state ), remain );
    }

    return 0;
--- a/src/prng.h
+++ b/src/prng.h
@@ -21,6 +21,8 @@
 #ifndef PRNG_H_
 #define PRNG_H_

+#include <sys/types.h>
+
 /* A chunk of random data. */
 typedef struct
 {
@@ -50,11 +52,14 @@ int nwipe_twister_read( NWIPE_PRNG_READ_SIGNATURE );
 /* ISAAC prototypes. */
 int nwipe_isaac_init( NWIPE_PRNG_INIT_SIGNATURE );
 int nwipe_isaac_read( NWIPE_PRNG_READ_SIGNATURE );
+int nwipe_isaac64_init( NWIPE_PRNG_INIT_SIGNATURE );
+int nwipe_isaac64_read( NWIPE_PRNG_READ_SIGNATURE );

 /* Size of the twister is not derived from the architecture, but it is strictly 4 bytes */
 #define SIZE_OF_TWISTER 4

-/* Size of the isaac is not derived from the architecture, but it is strictly 4 bytes */
+/* Size of the isaac/isaac64 is not derived from the architecture, but it is strictly 4 or 8 bytes */
 #define SIZE_OF_ISAAC 4
+#define SIZE_OF_ISAAC64 8

 #endif /* PRNG_H_ */
--- a/src/temperature.c
+++ b/src/temperature.c
@@ -0,0 +1,270 @@
+/*
+ *  temperature.c: functions that populate the drive temperature variables
+ *  in each drives context structure.
+ *
+ *  This program is free software; you can redistribute it and/or modify it under
+ *  the terms of the GNU General Public License as published by the Free Software
+ *  Foundation, version 2.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ *  FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ *  details.
+ *
+ *  You should have received a copy of the GNU General Public License along with
+ *  this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+//#define _LARGEFILE64_SOURCE
+//#define _FILE_OFFSET_BITS 64
+#define _BSD_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <dirent.h>
+
+#include "nwipe.h"
+#include "context.h"
+#include "method.h"
+#include "device.h"
+#include "prng.h"
+#include "options.h"
+#include "device.h"
+#include "logging.h"
+#include "temperature.h"
+
+int nwipe_init_temperature( nwipe_context_t* c )
+{
+    /* This function is called after each nwipe_context_t has been created.
+     * It initialises the temperature variables in each context and then
+     * constructs a path that is placed in the context that points to the
+     * appropriate /sys/class/hwmon/hwmonX directory that corresponds with
+     * the particular drive represented in the context structure.
+     */
+    DIR* dir;
+    DIR* dir2;
+    const char dirpath[] = "/sys/class/hwmon";
+    char dirpath_tmp[256];
+    char dirpath_tmp2[256];
+    char dirpath_hwmonX[256];
+    char device[256];
+    char device_context_name[256];
+    // const char dirpath[] = "/home/nick/mouse/hwmon1";
+    struct dirent* dp;
+    struct dirent* dp2;
+
+    /* Why Initialise with 1000000? Because the GUI needs to know whether data
+     * has been obtained so it can display appropriate information when a
+     * device is unable to provide temperature data */
+
+    c->temp1_crit = 1000000;
+    c->temp1_highest = 1000000;
+    c->temp1_input = 1000000;
+    c->temp1_lcrit = 1000000;
+    c->temp1_lowest = 1000000;
+    c->temp1_max = 1000000;
+    c->temp1_min = 1000000;
+    c->temp1_monitored_wipe_max = 1000000;
+    c->temp1_monitored_wipe_min = 1000000;
+    c->temp1_monitored_wipe_avg = 1000000;
+    c->temp1_flash_rate = 2;
+    c->temp1_flash_rate_counter = 0;
+    c->temp1_path[0] = 0;
+    c->temp1_time = 0;
+
+    /* Each hwmonX directory is processed in turn and once a hwmonX directory has been
+     * found that is a block device and the block device name matches the drive
+     * name in the current context then the path to ../hwmonX is constructed and written
+     * to the drive context structure '* c'. This path is used in the nwipe_update_temperature
+     * function to retrieve temperature data and store it in the device context
+     */
+
+    if( ( dir = opendir( dirpath ) ) != NULL )
+    {
+        /* Process each hwmonX sub directory  in turn */
+        while( ( dp = readdir( dir ) ) != NULL )
+        {
+            /* Does the directory start with 'hwmon' */
+            if( strstr( dp->d_name, "hwmon" ) != NULL )
+            {
+                if( nwipe_options.verbose )
+                {
+                    /* print a empty line to separate the different hwmon sensors */
+                    nwipe_log( NWIPE_LOG_DEBUG, "hwmon:" );
+                }
+                strcpy( dirpath_tmp, dirpath );
+                strcat( dirpath_tmp, "/" );
+                strcat( dirpath_tmp, dp->d_name );
+                strcpy( dirpath_hwmonX, dirpath_tmp );
+                strcat( dirpath_tmp, "/device/block" );
+
+                /* Depending on the class of block device, the device name may
+                 * appear in different sub-directories. So we try to open each
+                 * directory that are known to contain block devices. These are
+                 * /sys/class/hwmon/hwmonX/device/block
+                 * /sys/class/hwmon/hwmonX/device/nvme/nvme0
+                 * /sys/class/hwmon/hwmonX/device/
+                 */
+
+                if( ( dir2 = opendir( dirpath_tmp ) ) == NULL )
+                {
+                    if( nwipe_options.verbose )
+                    {
+                        nwipe_log( NWIPE_LOG_DEBUG, "hwmon: %s doesn't exist, trying next path", dirpath_tmp );
+                    }
+                    strcpy( dirpath_tmp2, dirpath_hwmonX );
+                    strcat( dirpath_tmp2, "/device/nvme/nvme0" );
+                    strcpy( dirpath_tmp, dirpath_tmp2 );
+
+                    if( ( dir2 = opendir( dirpath_tmp ) ) == NULL )
+                    {
+                        if( nwipe_options.verbose )
+                        {
+                            nwipe_log( NWIPE_LOG_DEBUG, "hwmon: %s doesn't exist, trying next path", dirpath_tmp );
+                        }
+
+                        strcpy( dirpath_tmp2, dirpath_hwmonX );
+                        strcat( dirpath_tmp2, "/device" );
+                        strcpy( dirpath_tmp, dirpath_tmp2 );
+
+                        if( ( dir2 = opendir( dirpath_tmp ) ) == NULL )
+                        {
+                            if( nwipe_options.verbose )
+                            {
+                                nwipe_log(
+                                    NWIPE_LOG_DEBUG, "hwmon: %s doesn't exist, no more paths to try", dirpath_tmp );
+                            }
+                            continue;
+                        }
+                    }
+                }
+
+                if( dir2 != NULL )
+                {
+                    if( nwipe_options.verbose )
+                    {
+                        nwipe_log( NWIPE_LOG_DEBUG, "hwmon: Found %s", dirpath_tmp );
+                    }
+
+                    /* Read the device name */
+                    while( ( dp2 = readdir( dir2 ) ) != NULL )
+                    {
+                        if( nwipe_options.verbose )
+                        {
+                            nwipe_log( NWIPE_LOG_DEBUG, "hwmon: dirpath_tmp=%s/%s", dirpath_tmp, &dp2->d_name[0] );
+                        }
+
+                        /* Skip the '.' and '..' directories */
+                        if( dp2->d_name[0] == '.' )
+                        {
+                            continue;
+                        }
+                        strcpy( device, dp2->d_name );
+
+                        /* Create a copy of the device name from the context but strip the path from it, right justify
+                         * device name, prefix with spaces so length is 8. */
+                        nwipe_strip_path( device_context_name, c->device_name );
+
+                        /* Remove leading/training whitespace from a string and left justify result */
+                        trim( device_context_name );
+
+                        /* Does the hwmon device match the device for this drive context */
+                        if( strcmp( device, device_context_name ) != 0 )
+                        {
+                            /* No, so try next hwmon device */
+                            continue;
+                        }
+                        else
+                        {
+                            /* Match ! This hwmon device matches this context, so write the hwmonX path to the context
+                             */
+                            nwipe_log( NWIPE_LOG_NOTICE, "hwmon: %s has temperature monitoring", device, dirpath_tmp );
+                            if( nwipe_options.verbose )
+                            {
+                                nwipe_log( NWIPE_LOG_DEBUG, "hwmon: %s found in %s", device, dirpath_tmp );
+                            }
+                            /* Copy the hwmon path to the drive context structure */
+                            strcpy( c->temp1_path, dirpath_hwmonX );
+                        }
+                    }
+                    closedir( dir2 );
+                }
+            }
+        }
+        closedir( dir );
+    }
+
+    return 0;
+}
+
+void nwipe_update_temperature( nwipe_context_t* c )
+{
+    /* For the given drive context obtain the path to it's hwmon temperature settings
+     * and read then write the temperature values back to the context. A numeric ascii to integer conversion is
+     * performed. The temperaures should be updated no more frequently than every 60 seconds
+     */
+
+    char temperature_label[NUMBER_OF_FILES][20] = {
+        "temp1_crit", "temp1_highest", "temp1_input", "temp1_lcrit", "temp1_lowest", "temp1_max", "temp1_min" };
+    int* temperature_pcontext[NUMBER_OF_FILES] = {
+
+        &( c->temp1_crit ),
+        &( c->temp1_highest ),
+        &( c->temp1_input ),
+        &( c->temp1_lcrit ),
+        &( c->temp1_lowest ),
+        &( c->temp1_max ),
+        &( c->temp1_min ) };
+
+    char path[256];
+    char temperature[256];
+    FILE* fptr;
+    int idx;
+    int result;
+
+    for( idx = 0; idx < NUMBER_OF_FILES; idx++ )
+    {
+        /* Construct the full path including filename */
+        strcpy( path, c->temp1_path );
+        strcat( path, "/" );
+        strcat( path, &( temperature_label[idx][0] ) );
+
+        /* Open the file */
+        if( ( fptr = fopen( path, "r" ) ) != NULL )
+        {
+            /* Acquire data until we reach a newline */
+            result = fscanf( fptr, "%[^\n]", temperature );
+
+            /* Convert numeric ascii to binary integer */
+            *( temperature_pcontext[idx] ) = atoi( temperature );
+
+            /* Divide by 1000 to get degrees celcius */
+            *( temperature_pcontext[idx] ) = *( temperature_pcontext[idx] ) / 1000;
+
+            if( nwipe_options.verbose )
+            {
+                nwipe_log( NWIPE_LOG_NOTICE, "hwmon: %s %dC", path, *( temperature_pcontext[idx] ) );
+            }
+
+            fclose( fptr );
+        }
+        else
+        {
+            if( nwipe_options.verbose )
+            {
+                nwipe_log( NWIPE_LOG_NOTICE, "hwmon: Unable to  open %s", path );
+            }
+        }
+    }
+
+    /* Update the time stamp that records when we checked the temperature,
+     * this is used by the GUI to check temperatures periodically, typically
+     * every 60 seconds */
+    c->temp1_time = time( NULL );
+
+    return;
+}
--- a/src/temperature.h
+++ b/src/temperature.h
@@ -0,0 +1,30 @@
+/*.
+ *  temperature.h: The header file for disk drive temperature sensing
+ *
+ *  This program is free software; you can redistribute it and/or modify it under
+ *  the terms of the GNU General Public License as published by the Free Software
+ *  Foundation, version 2.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ *  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ *  details.
+ *
+ *  You should have received a copy of the GNU General Public License along with
+ *  this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef TEMPERATURE_H_
+#define TEMPERATURE_H_
+
+#include <sys/types.h>
+#include "context.h"
+
+int nwipe_init_temperature( nwipe_context_t* );
+void nwipe_update_temperature( nwipe_context_t* );
+
+#define NUMBER_OF_FILES 7
+
+#endif /* TEMPERATURE_H_ */
--- a/src/version.c
+++ b/src/version.c
@@ -4,14 +4,14 @@
 * used by configure to dynamically assign those values
 * to documentation files.
 */
-const char* version_string = "0.31";
+const char* version_string = "0.34";
 const char* program_name = "nwipe";
 const char* author_name = "Martijn van Brummelen";
 const char* email_address = "git@brumit.nl";
-const char* years = "2021";
+const char* years = "2022";
 const char* copyright = "Copyright Darik Horn <dajhorn-dban@vanadac.com>\n\
 Modifications to original dwipe Copyright Andy Beverley <andy@andybev.com>\n\
 This is free software; see the source for copying conditions.\n\
 There is NO warranty; not even for MERCHANTABILITY or FITNESS\n\
 FOR A PARTICULAR PURPOSE.\n";
-const char* banner = "nwipe 0.31";
+const char* banner = "nwipe 0.34";