让应用程序有root权限

#include
#include
#include
#include

/*
 *
 * chown root.root ./test-uid
 * chmod 4755 ./test-uid
 */


uid_t uid;

int main()
{
    uid = getuid();
    if(setuid(0))
            return -1;
      if(getuid())
        return -1;

    execl("/system/hoperun/pppon.sh","pppon.sh",(char *)0);

      if(setuid(uid))
    {
               return -1;
     }
    return 0;
}