D-SP-Ch8b-Process_Creation_and_Termination

Process Creation & Termination

flowchart LR
    fork["fork()"]
    wait["wait"]
    resumes["resumes"]
    exec["exec()"]
    exit["exit()"]
    
    fork -->|parent| wait
    wait --> resumes
    fork -->|child| exec
    exec --> exit
    exit -.-> wait
    
    style exit stroke:#ff9999,stroke-width:3px

很重要的一張圖

fork

• D-SP-Ch8ba-fork
• D-SP-Ch8bb-Deadlock

Termination

Normal Termination

• Return from main()
• D-SP-Ch8bc-exit

Abnormal Termination

• call abort() (這就是跟 kernel 説：「我要自殺了」，然後 kernel 説：「我準了」)
• terminated by signal

wait

• D-SP-Ch8bd-wait_waitpid_waitid
• D-SP-Ch8be-wait3_wait4
• D-SP-Ch8bf-zombie_orphan
• D-SP-Ch8bg-race_condition

exec

• D-SP-Ch8bh-exec