setuid_root.c

linux下的程序开发（C语言实现）：本程序主要实现linux下进程的管理

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
int main(int argc,char *argv[])
{

	printf("uid=%d\teuid=%d\n",getuid(),geteuid());
	printf("setreuid 0,500");
	setreuid(0,500);
	printf("uid=%d\teuid=%d\n",getuid(),geteuid());
	setuid(0);
	printf("uid=%d\teuid=%d\n",getuid(),geteuid());
	system("passwd");	
}