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how does operating system interact with the applications softwares?
i want to know in detail about the entire process through which operating systems and applications softwares installed on any computer communicate with each other. what happens behind the scene from when we click on an icon of a program on our computer to the time that the computer actually loads that program and gets it ready to be used by us and then how does that application corresponds with the operating system as it takes input from the users.
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by: sunnycoderPosted on 2008-09-24 at 11:21:15ID: 22562470
Hello atif786,
To launch an application, OS would first do some housekeeping such as create a process control block and add it to scheduler queue, allocate some memory, initialize page tables, load executable in code segment, initialize environment and registers and finally transfer control to the program.
Further reading
http://computer.howstuffwo
http://en.wikipedia.org/wi
Once the program is running it needs to pass some requests such as I/O etc to the OS. Application cant directly perform these operations - OS should do them on behalf of the application. All such operations are done through a well defined interface called system calls. This requires switching from user mode to kernel mode - a context switch
Read details of system calls here
http://en.wikipedia.org/wi
http://www.tldp.org/LDP/kh
http://en.wikipedia.org/wi
Regards,
sunnycoder