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[Qemu-devel] [PATCH] block/raw-posix.c: Fixes raw_getlength() on Mac OS
From: |
Programmingkid |
Subject: |
[Qemu-devel] [PATCH] block/raw-posix.c: Fixes raw_getlength() on Mac OS X so that it reports the correct length of a real CD |
Date: |
Sat, 27 Dec 2014 19:36:16 -0500 |
The raw_getlength() function under Mac OS X incorrectly returned a constant
value instead of calculating the size of a real CD-ROM disc. This patch fixes
this problem and makes booting from a real CD-ROM disc possible again under Mac
OS X.
signed-off-by: John Arbuckle <address@hidden>
---
block/raw-posix.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index e51293a..d723133 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1312,7 +1312,16 @@ again:
if (size == 0)
#endif
#if defined(__APPLE__) && defined(__MACH__)
- size = LLONG_MAX;
+ // Query the number of sectors on the disk
+ uint64_t sectors = 0;
+ ioctl(fd, DKIOCGETBLOCKCOUNT, §ors);
+
+ // Query the size of each sector
+ uint32_t sectorSize = 0;
+ ioctl(fd, DKIOCGETBLOCKSIZE, §orSize);
+
+ size = sectors * sectorSize;
+ //printf("size of disc = %d MB\n", size/(1024*1024));
#else
size = lseek(fd, 0LL, SEEK_END);
if (size < 0) {
--
1.7.5.4
- [Qemu-devel] [PATCH] block/raw-posix.c: Fixes raw_getlength() on Mac OS X so that it reports the correct length of a real CD,
Programmingkid <=