1 files changed, 45 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/isnetdr.c b/reference/C/CONTRIB/SNIP/isnetdr.c
new file mode 100755
index 0000000..0e90e57
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/isnetdr.c
@@ -0,0 +1,45 @@
+/*----------------------------------------------------------------------*/
+/*  determine_drive_type -- Public Domain code from Bob Dolan           */
+/*                                                                      */
+/*  INPUT:  the drive number ( 0=current, 1=A:, 2=B:, etc. )            */
+/*  OUTPUT: drive type ( 0=physical drive, 1=Network drive, 2=RamDisk ) */
+/*----------------------------------------------------------------------*/
+ 
+#include <dos.h>
+ 
+drive_type(int dr)
+{
+      union REGS regs;
+ 
+      regs.x.ax = 0x4409;     /* IOCTL func 9 */
+      regs.h.bl = (unsigned char)dr;
+      int86(0x21, &regs, &regs);
+      if (!regs.x.cflag)
+      {
+            if (regs.x.dx & 0x1000)
+                  return 1;   /* Network drive */
+
+            else if (regs.x.dx == 0x0800)
+                  return 2;   /* RAMdisk */
+      }
+ 
+      return 0;   /* physical drive */
+}
+ 
+#ifdef TEST
+ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+ 
+int main(int argc, char *argv[])
+{
+      int dr = 0;
+ 
+      if (1 < argc)
+            dr = toupper(*argv[1]) - '@';
+      printf ("drive_type(%d) = %d\n", dr, drive_type(dr));
+      return 0;
+}
+ 
+#endif /* TEST */