Operations on process

A child process obtainits resources -> OS -> parent process

Case study: UNIX OS

• a new process is created by the fork() system call

• Both process (the parent and the client) continues execution at the instruction after the fork()

• fork() takes no parameters and returns an interger value

• Below are different values returned by fork()

1. successful

Zero: Returned to the newly created child process

Positive value: Returned to parent or caller. The value contains process ID of newly creaeted child process.

1. Unsuccessful

Negative value: creation of a child process was unsuccessful