Write and test a C program to check the processor status suc

Write and test a C program   to check the processor status such as processes running on the system.   

Solution

#include <sys/types.h>
#include <sys/wait.h>

int status;
pid_t return_pid = waitpid(process_id, &status, WNOHANG);
if (return_pid == -1) {
   printf(\"error in getting process\");
} else if (return_pid == 0) {
   printf(\"process is still running\");
} else if (return_pid == process_id) {
   printf(\"process finished\")
}