Sleepd is one of the important daemons started when webOS boots. It is responsible for scheduling platform sleeps as soon as it is idle, so that we see optimum battery performance. To achieve this it keeps polling on the system to see if any of the other services or processes need the platform running, and if not it sends the suspend message to all these components (so that they can finish whatever they are doing ASAP and suspend). Sleepd then lets the kernel know that the platform is ready to sleep. Once an interrupt (such as key press) has woken the platform up, sleepd lets the entire system know that the platform is up and running so that all the activities can resume.
Sleepd also manages the RTC alarms on the system by maintaining a SQlite database for all the requested alarms.
Below are the tools and libraries (and their minimum versions) required to build sleepd:
- cmake 2.6
- gcc 4.3
- glib-2.0 2.16.6
- libxml2 2.7.2
- make (any version)
- openwebos/cjson 1.8.0
- openwebos/luna-service2 3.0.0
- openwebos/nyx-lib 2.0.0 RC 2
- openwebos/powerd 4.0.0
- pkg-config 0.22
- sqlite3 3.6.20
Once you have downloaded the source, execute the following to build it:
$ mkdir BUILD
$ cd BUILD
$ cmake ..
$ make
$ sudo make install
The daemon and utility script will be installed under
/usr/local/sbin
the default preferences file under
/usr/local/etc/default
and the upstart script under
/usr/local/etc/event.d
You can install it elsewhere by supplying a value for CMAKE_INSTALL_PREFIX when invoking cmake. For example:
$ cmake -D CMAKE_INSTALL_PREFIX:STRING=$HOME/projects/openwebos ..
$ make
$ make install
will install the files in subdirectories of $HOME/projects/openwebos instead of subdirectories of /usr/local.
Specifying CMAKE_INSTALL_PREFIX also causes the pkg-config files under it to be used to find headers and libraries. To have pkg-config look in a different tree, set the environment variable PKG_CONFIG_PATH to the path to its lib/pkgconfig subdirectory.
From the directory where you originally ran make install, invoke:
$ sudo xargs rm < install_manifest.txt
The tools required to generate the documentation are:
- doxygen 1.6.3
- graphviz 2.20.2
Once you have run cmake, execute the following to generate the documentation:
$ make docs
To view the generated HTML documentation, point your browser to
doc/html/index.html
All content, including all source code files and documentation files in this repository are:
Copyright (c) 2011-2012 Hewlett-Packard Development Company, L.P.
All content, including all source code files and documentation files in this repository are: Licensed under the Apache License, Version 2.0 (the "License"); you may not use this content except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.