Tag Archives: programming

Statically compile redis 3.0.2 on CentOS 5 (RHEL 5)

2015-06-30How to, Linux, Programmingcentos, compile, programming, rhel, rhel5Max Chinni

How to statically compile redis 3.0.2 on CentOS 5 (RHEL 5)

wget http://download.redis.io/releases/redis-3.0.2.tar.gz
wget http://prdownloads.sourceforge.net/tcl/tcl8.5.18-src.tar.gz

Install tcl8.5

tar xfz tcl8.5.18-src.tar.gz
cd tcl8.5.18/unix
./configure
make
make test
make install

Compile redis

Statically linked binaries

make CFLAGS="-static" EXEEXT="-static" LDFLAGS="-I/usr/local/include/"

Dynamically linked binaries

make LDFLAGS="-I/usr/local/include/"

How to manually install redis

cd src/
cp redis-{server,cli} /usr/local/bin/
chown root: /usr/local/bin/redis-{server,cli}
chmod 755 /usr/local/bin/redis-{server,cli}
mkdir /{var,etc}/redis /var/redis/6379
chmod 775 /{var,etc}/redis
cp redis.conf /etc/redis/6379.conf
sed -i 's/daemonize no/daemonize yes/' /etc/redis/6379.conf
sed -i 's,pidfile /var/run/redis.pid,pidfile /var/run/redis_6379.pid,' /etc/redis/6379.conf
sed -i 's/^# bind 127.0.0.1/bind 127.0.0.1/' /etc/redis/6379.conf
sed -i 's,logfile "",logfile "/var/log/redis_6379.log",' /etc/redis/6379.conf
sed -i 's,dir ./,dir /var/redis/6379,' /etc/redis/6379.conf

How to compile rsync for Android in Ubuntu

2014-06-10Android, How to, Linux, Programmingandroid, arm, binary, compile, development, linux, programming, rsync, ubuntuMax Chinni

My situation

My machine

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04 LTS
Release:    14.04
Codename:   trusty

The latest rsync version to compile (for me it was rsync-3.1.0.tar.gz)

$ curl -s http://rsync.samba.org/ftp/rsync/ \
    | sed -r 's/^.*href="([^"]*)".*$/\1/' | grep 'rsync-[0-9].*\.tar\.gz$'

Procedure

save the tarball name in a variable
```
$ RSYNCTGZ="rsync-3.1.0.tar.gz"
```

install needed software

$ sudo aptitude install gcc-arm-linux-gnueabi

download sources

$ wget http://rsync.samba.org/ftp/rsync/$RSYNCTGZ
$ tar xzf $RSYNCTGZ
$ cd rsync-[0-9]*

compile

$ ./configure --host=arm-linux-gnueabi CFLAGS=-static
$ make

install on the device

$ adb push rsync /data/local/tmp && adb shell chmod 775 /data/local/tmp/rsync

test execution
```
$ adb shell /data/local/tmp/rsync
```

References

stackoverflow

Override DNS for KitKat – first release

2014-06-05Android, Override DNS, Programmingandroid, app, dns, overridedns, programmingMax Chinni

Override DNS for KitKat has been released

Override DNS is the easiest way to force your rooted phone to use custom nameservers on mobile networks.

Many things dealing with name resolution have changed in Android 4.4 KitKat and so all the current Play Store apps stopped working.

The problem I found with this release of Android (4.4) is that, apparently for caching reasons, the system behaviour has been changed to redirect all DNS queries to a system daemon called netd (here’s a link to a presentation related to Android networking before 4.4 which, however, covers part of this topics).

The getprop/setprop method used by all the DNS changer apps does not work anymore. Those values, when changed, get simply ignored by the netd daemon.

It’s necessary to communicate directly to the daemon via the /dev/socket/netd socket.

The app automatically guesses the network device name and applies the right commands each time a mobile network gets activated.