Wednesday 5 August 2015

CYNOGENMOD

CyanogenMod, usually abbreviated to CM, is an open-source operating system for smartphones and tablet computers, based on the Android mobile platform. It is developed as free and open source software based on the official releases of Android by Google, with extended original and third-party code. It is based on a rolling release development model.

CyanogenMod offers features and options which are not found in the official firmware distributed by mobile device vendors. Features supported by CyanogenMod include native theming support,FLAC audio codec support, a large Access Point Name list, an OpenVPN client, Privacy Guard,support for tethering over common interfaces, CPU overclocking and other performance enhancements, unlockablebootloader and root access, soft buttons and other "tablet tweaks", toggles in the notification pull-down (such as Wi-Fi, Bluetooth and GPS), and other interface enhancements. CyanogenMod does not contain spyware or bloatware, according to its developers.CyanogenMod is also stated to increase performance and reliability compared with official firmware releases.

Soon after the introduction of the HTC Dream  mobile phone in September 2008, a method was discovered to attain privileged control (termed "root access") within Android's Linux-based subsystem.Having root access, combined with the open source nature of the Android operating system, allowed the phone's stock firmware to be modified and re-installed onto the phone.

In the following year, modified firmwares for the Dream were developed and distributed by Android enthusiasts. One, maintained by a developer named JesusFreke, became popular among Dream owners. In August 2009, JesusFreke stopped work on his firmware, and suggested users switch to a version of his ROM that had been further enhanced by developer Cyanogen (Steve Kondik) called "CyanogenMod".

Google has gone to great lengths to avoid the GPL by building their own low level components such as Dalvik and Bionic. In CM, the only GPL component that currently comes to mind that we’ve added is our Torch app (originally called Nexus One Torch) The Apache license specifically ALLOWS precisely what you suggest it doesn’t. A dual-license would do the same, but also protect contributors by forcing unaffiliated entities to contribute back if they use the software in a commercial context. It’s not so that CM can close the source and still ship it to our users. Again, we don’t have any plans to change licenses.

Focal is a special case- it has to be GPL because Focal uses a number of GPL components under the hood,this proposed the dual-license extension as a way to work around some of the inherent problems with the GPL and give a greater degree of freedom to both him and CM as an organization. This is a very common licensing model in the open-source world.

But none of this matters. We’re not closing the source or changing the license of any code that has been contributed to the project.

Benchmark has a long history of supporting open source projects intent on becoming successful enterprises. Our open source history includes Red Hat, MySQL,SpringSource, JBoss, Eucalyptus, Zimbra, Elasticsearch, HortonWorks, and now Cyanogen. We’ve been behind many of the most successful open source software companies in the world. We have a deep respect for the special needs of these businesses, and how to build companies while preserving the transparency and vigor of the open source communities.

Several versions of Cyanogenmod are as follows:


CyanogenMod
main version

Android version
Last or major
release

3
Android 1.5(Cupcake)
3.6.8.1
3.9.3
4
Android1.5/1.6
(Cupcake/Donut)
4.1.4
4.2.15.1
5
Android 2.0/2.1
(Eclair)

5.0.8
6
Android 2.2.x
(Froyo)
6.0.0
6.1.3
7
Android 2.3.x
(Gingerbread)
7.0.3
7.1.0
7.2.0
8
Android 3.x
(Honeycomb)
N/A
9
Android 4.0.x
(Ice Cream Sandwich)
9.1
10
Android 4.1.x
(Jelly Bean)
10.0.0
Android 4.2.x
(Jelly Bean)
10.1.3
Android 4.3.x
(Jelly Bean)

10.2.1
11
Android 4.4.x
(KitKat)
11.0 M12
12
Android 5.0.x
(Lollipop)
12.0 (Nightly)

12.1
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Article By:
G.VINEETH KUMAR,
CSE DEPARTMENT,
SPHOORTHY ENGINEERING COLLEGE
Sphoorthy Engineering College




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