[Qemu-devel] [PATCH v3] block/raw-posix.c: Fixes raw_getlength() on Mac OS X so that it reports the correct length of a real CD

[Programmingkid]

This patch fixes the problem with raw_getlength() on Mac OS X so that it 
actually calculates the correct size of a volume. It has been updated to fix 
certain coding style issues. Booting and using a real CD in QEMU works again. 

signed-off-by: John Arbuckle <programmingk...@gmail.com>

---
 block/raw-posix.c |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/block/raw-posix.c b/block/raw-posix.c
index e51293a..a090c9c 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1312,7 +1312,24 @@ again:
         if (size == 0)
 #endif
 #if defined(__APPLE__) && defined(__MACH__)
-        size = LLONG_MAX;
+   {
+        uint64_t sectors = 0;
+        uint32_t sectorSize = 0;
+        int ret;
+
+        /* Query the number of sectors on the disk */
+        ret = ioctl(fd, DKIOCGETBLOCKCOUNT, &sectors);
+        if (ret == -1) {
+           return -errno;
+        }
+
+        /* Query the size of each sector */
+        ret = ioctl(fd, DKIOCGETBLOCKSIZE, &sectorSize);
+        if (ret == -1) {
+           return -errno;
+        }
+        size = sectors * sectorSize;
+   }
 #else
         size = lseek(fd, 0LL, SEEK_END);
         if (size < 0) {
-- 
1.7.5.4