ids.c

基于网络编程的例子

/*
 * ids.c - Print UIDs and GIDs
 */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int main(void)
{
    printf("Real user ID: %d\n", getuid());
    printf("Effective user ID: %d\n", geteuid());
    printf("Real group ID: %d\n", getgid());
    printf("Effective group ID: %d\n", getegid());
    exit(EXIT_SUCCESS);
}