ftok
ftok is a function found in some Unix-like operating systems. Its primary purpose is to generate a unique key identifier based on a file path and a project identifier. This key is then used to access shared memory segments. Shared memory is a mechanism for inter-process communication (IPC) where multiple processes can access the same region of memory.
The function takes two arguments: a string representing the file path and an integer representing the project
ftok combines these two inputs using a specific algorithm to produce a unique 32-bit integer. This integer,