home *** CD-ROM | disk | FTP | other *** search
- /*
- * ISDEVICE - Will invoke Ms-Dos IOCTL function to "get" the attributes of
- * the specified DOS handle.
- *
- * Result := True If the specified handle is a device. := False If the
- * specified handle is a file.
- *
- * Caution: A True return only indicates that the handle is assigned to a device
- * driver. These include the CON, PRN, AUX and any user installed device
- * drivers.
- *
- * A False return indicates that the handle is assigned to a file that may be on
- * a Floppy, Hard Disk or Ram Disk.
- */
-
- #include <stdio.h>
- #include <dos.h>
-
- int
- isdevice (int handle) {
- union REGS R;
-
- R.x.ax = 0x4400; /* MS-DOS IOCTL "Get" function */
- R.x.bx = handle; /* ... Handle for IOCTL "Get" */
- R.x.dx = 0;
- intdos(&R, &R); /* ... MS-DOS Entry Interrupt */
- if ((R.x.dx & 0x80) == 0) return (0);
- else return (1);
- }