dis.cpp

dos下禁止或允许访问一个驱动器的例子。

//禁止与打开驱动器 2003-4-29
#include "dos.h"
#include "ctype.h"
#include "stdio.h"


int dis_drv(char drive)
{
    char drv=toupper(drive);

    REGS regs;
    SREGS sregs;
	regs.h.dl = drv-'A';

	regs.x.ax = 0x5F08;
	int86x (0x21,&regs,&regs,&sregs);

	return regs.x.ax;
}

int ena_drv(char drive)
{
    char drv=toupper(drive);

    REGS regs;
    SREGS sregs;
	regs.h.dl = drv-'A';

	regs.x.ax = 0x5F07;
	int86x (0x21,&regs,&regs,&sregs);

	return regs.x.ax;
}
void main(int argc,char **argv)
{
   if(argc!=3)
   {
       printf("This programe to demo disable  or enable a drvie\n");
       return;
   }

   switch(toupper(argv[1][0]))
   {
     case 'E': printf("enable drive result=%d\n",ena_drv(argv[2][0]));
	       break;
     case 'D': printf("disable drive result=%d\n",dis_drv(argv[2][0]));
	       break;
     default :printf("Invaild paramstr\n");
   }

}