Knowledge
Booting
Special Processes
Process Control Block (PCB)
Process State
Process Scheduling Queue
D-SP-Ch8ae-Process_Scheduling_Queue
Content: Virtual Memory
Process Control Function
#include <sys/types.h>
#include <unistd.h>
pid_t getpid(void) // get process id
pid_t getppid(void) // get parent process id
uid_t getuid(void) // get user id
uid_t geteuid(void) // get effective user id
gid_t getgid(void) // get group id
gid_t getegid(void) // get effective group id- 他們都不會回傳 error 因為他們回傳 error 代表這個 OS 沒救不能用了最好直接卸載