This is a great idea. ?
Tag: Programming
TSA’s Random Lane Picker
This is so moronic I almost fell off my chair laughing: it seems like the TSA spent $47,000 on a “random lane picker.” Please, you be the judge whether it was worth it:
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https://www.youtube.com/watch?v=P_KmFJ2gGzw
https://www.youtube.com/watch?v=P_KmFJ2gGzw
It needs to be operated manually … with hygienic gloves! ?
Ubuntu on Windows
I didn’t see that coming … I still remember a time where this was UNTHINKABLE!!! ?
Backup And Restore Your Android Phone With ADB (And rsync)
Based on my previous scripts and inspired by two blog posts that I stumbled upon I tackled the “backup all my apps, settings and data” problem for my Android devices again. The “new” solutions both use
rsync
instead of
adb pull
for file transfers. They both use ADB to start a rsync daemon on the device, forward its ports to localhost and run rsync against it from your host.
Simon’s solution assumes your phone has rsync already (e.g. because you run CyanogenMod) and can become root via
adb root
. It clones all files from the phone (minus
/dev
,
/sys
,
/proc
etc.). He also configures udev to start the backup automatically when the phone is plugged in.
pts solves the setup without necessarily becoming root. He also has a way of providing a rsync binary to phones that don’t have any (e.g. when running OxygenOS). He also has a few tricks on how to debug the rsync daemon setup on the phone.
I’ve tried to combine both methods. My approach doesn’t require adb or rsync to be run as root. It’ll use the the system’s rsync when available or temporarily upload and use a backup one extracted from Cyanogen OS (for my OnePlus One). Android won’t allow you to
chmod +x
a file uploaded to
/sdcard
, but in
/data/local/tmp
it works. ?
The scripts will currently only backup and restore all of your
/sdcard
directory. Assuming you’re also using something like Titanium Backup you’ll be able to backup and restore all your apps, settings and data. To reduce the amount of data to copy it uses rsync filters to exclude caches and other files that you definitely don’t want synced (
.DS_Store
files anyone?).
At the moment there’s one caveat: I had to disable restoring modification times (i.e. use
--no-times
) because of an obnoxious error (they will be backuped fine, only restoring is the problem): ?
mkstemp “…” (in root) failed: Operation not permitted (1)
Additionally if you’re on the paranoid side you can also build your own rsync for Android to use as the backup binary.
The code and a ton of documentation can be found on GitHub. Comments and suggestions are welcome. ?
Build Rsync for Android Yourself
To build rsync for Android you’ll need to have the Android NDK installed already.
Then clone the rsync for android source (e.g. from CyanogenMod LineageOS) …
git clone https://github.com/LineageOS/android_external_rsync.git cd android_external_rsync # checkout the most recent branch git checkout cm-14.1
… create the missing
jni/Application.mk
build file (e.g. from this Gist) and adapt it to your case …
… and start the build with
export NDK_PROJECT_PATH=pwd ndk-build -d rsync
You’ll find your self-build rsync in
obj/local/*/rsync
. ?
Update 2017-10-06:
- Updated sources from CyanogenMod to LineageOS.
- Added links to Gist and Andoid NDK docs
- Updated steps to work with up-to-date setups
If you get something like the following warnings and errors …
[...]
./flist.c:454:16: warning: implicit declaration of function 'major' is invalid in C99
[-Wimplicit-function-declaration]
if ((uint32)major(rdev) == rdev_major)
^
./flist.c:458:41: warning: implicit declaration of function 'minor' is invalid in C99
[-Wimplicit-function-declaration]
if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
^
./flist.c:467:11: warning: implicit declaration of function 'makedev' is invalid in C99
[-Wimplicit-function-declaration]
rdev = MAKEDEV(major(rdev), 0);
^
./rsync.h:446:36: note: expanded from macro 'MAKEDEV'
#define MAKEDEV(devmajor,devminor) makedev(devmajor,devminor)
^
3 warnings generated.
[...]
./flist.c:473: error: undefined reference to 'makedev'
./flist.c:454: error: undefined reference to 'major'
./flist.c:457: error: undefined reference to 'major'
./flist.c:458: error: undefined reference to 'minor'
./flist.c:467: error: undefined reference to 'major'
./flist.c:467: error: undefined reference to 'makedev'
./flist.c:617: error: undefined reference to 'major'
./flist.c:619: error: undefined reference to 'minor'
./flist.c:621: error: undefined reference to 'minor'
./flist.c:788: error: undefined reference to 'makedev'
./flist.c:869: error: undefined reference to 'makedev'
./flist.c:1027: error: undefined reference to 'minor'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [obj/local/armeabi-v7a/rsync] Error 1
… you probably need to update
config.h
and change
/* #undef MAJOR_IN_SYSMACROS */
to
#define MAJOR_IN_SYSMACROS 1
.
Maciej Cegłowski on Website Obesity
Maciej Cegłowski has a great and funny talk about The Website Obesity Crisis. ?
Oh, The Losses … All Those Losses
It seems pirates have found the ultimate weapon to kill the music industry: copying music to /dev/null … all the time! ?
Money Quote:
Last week, Sunde told TorrentFreak that he’d already made 120 million copies and “cost” the music industry $150 million in losses, at least by the music industry’s preferred accounting practices counting the dollar value of any copied song as lost revenue.
Ramen Code
The plaintiffs in Toyota’s Unintended Acceleration lawsuit had someone with knowledge in building embedded software had a look at Toyota’s source code:
possible bit flips, task deaths that would disable the failsafes, memory corruption, single-point failures, inadequate protections against stack overflow and buffer overflow, single-fault containment regions, thousands of global variables. The list of deficiencies in process and product was lengthy.
Most Awesome Script Collection
CFSSL FTW
After reading how CloudFlare handles their PKI and that LetsEncrypt will use it I wanted to give CFSSL a shot.
Reading the project’s documentation doesn’t really help in building your own CA, but searching the Internet I found Fernando Barillas’ blog explaining how to create your own root certificate and how to create intermediate certificates from this.
I took it a step further I wrote a script generating new certificates for several services with different intermediates and possibly different configurations (e.g. depending on your distro and services certain cyphers (e.g. using ECC) may not be supported).
I also streamlined generating service specific key, cert and chain files. 😀
Have a look at the full Gist or just the most interesting part:
You’ll still have to deploy them yourself.
Update 2016-10-04:
Fixed some issues with this Gist.
- Fixed a bug where intermediate CA certificates weren’t marked as CAs any more
- Updated the example CSRs and the script so it can now be run without errors
Update 2017-10-08:
- Cleaned up `renew-certs.sh` by extracting functions for generating root CA, intermediate CA and service keys.