基于 C 的用户提权

#include
#include
#include
#include

int main()
{
    uid_t uid ,euid;
    uid = getuid() ;
    euid = geteuid();
    if(setreuid(euid, uid))
        perror("setreuid");
    system("/space/web_sync/script/cgi_exec.sh $QUERY_STRING");
    return 0;
}