xv6_chapter1 Operating system interfaces
XV6 实现的所有系统调用： int fork() //Create a process, return child’s PID. void exit(int status) //Terminate the current process; status reported to wait(). No return. int wait(int *status) //Wait for a child to exit; exit status in *status; returns child PID. int kill(int pid) //Terminate process PID. Returns 0, or -1 for error. int getpid() //Return the current process’s PID. int sleep(int n) //Pause for n clock ticks. int exec(char *file, char *argv[]) //Load a file and execute it with arguments; only returns if error....