Added code to read physical block size on Linux.
diff --git a/diskio-unix.cc b/diskio-unix.cc
index af71cdb..a7c4724 100644
--- a/diskio-unix.cc
+++ b/diskio-unix.cc
@@ -177,6 +177,27 @@
return (blockSize);
} // DiskIO::GetBlockSize()
+// Returns the physical block size of the device, if possible. If this is
+// not supported, or if an error occurs, this function returns 0.
+// TODO: Get this working in more OSes than Linux.
+int DiskIO::GetPhysBlockSize(void) {
+ int err = -1, physBlockSize = 0;
+
+ // If disk isn't open, try to open it....
+ if (!isOpen) {
+ OpenForRead();
+ } // if
+
+ if (isOpen) {
+#if defined __linux__ && !defined(EFI)
+ err = ioctl(fd, BLKPBSZGET, &physBlockSize);
+#endif
+ } // if (isOpen)
+ if (err == -1)
+ physBlockSize = 0;
+ return (physBlockSize);
+} // DiskIO::GetPhysBlockSize(void)
+
// Returns the number of heads, according to the kernel, or 255 if the
// correct value can't be determined.
uint32_t DiskIO::GetNumHeads(void) {