System Call

• It is a programmatic method in which a computer program requests a service from the kernel of the OS.

Types

1. Process Control:

2. This system calls perform the task of process creation, process termination, etc.

3. File Management:

4. File management system calls handle file manipulation jobs like creating a file, reading, and writing, etc.

5. Device Management:

6. Device management does the job of device manipulation like reading from device buffers, writing into device buffers, etc.

7. Information Maintenance:

8. It handles information and its transfer between the OS and the user program.

9. Communications:

10. These types of system calls are specially used for interprocess communications.

Important System Calls Used in OS

1. wait()
2. fork()
3. exec()
4. kill()
5. exit()