Hi,
There is no documentation saying that but you may freely interpret as those things are NOT partitions in apple speaking, they are ALWAYS called just drivers.
El 10/08/2011, a las 16:23, William Hahne escribió:
On Wed, Aug 10, 2011 at 5:48 AM, Mark Cave-Ayland mark.cave-ayland@siriusit.co.uk wrote: On 09/08/11 22:54, William Hahne wrote:
BootX will only check the first few partitions from mac-parts to find the Mac OS partition. So it must expect drivers and void partitions to be ignored. This patch makes it so that if you specify the partition cd:1 and partition 1 is a driver it will keep checking partitions until reaching the first non-driver and non-void partition.
Index: packages/mac-parts.c
--- packages/mac-parts.c (revision 1041) +++ packages/mac-parts.c (working copy) @@ -200,15 +203,26 @@ } else { /* Another partition was explicitly requested */
- SEEK( bs * parnum );
- READ( &par, sizeof(par) );
- /* We have to find the first valid partition corresponding to the
given number.
- This is because Apple sometimes includes a bunch of extra partitions
that
- BootX expects to be ignored */
- while (parnum < par.pmMapBlkCnt) {
- SEEK( bs * parnum );
- READ( &par, sizeof(par) );
- if( (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsValid) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsAllocated) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsReadable) ) {
- /* Check if valid, also device driver partitions are expected to be
ignored */
- if( (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsValid) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsAllocated) &&
- (__be32_to_cpu(par.pmPartStatus) & kPartitionAUXIsReadable) &&
- !(__be32_to_cpu(par.pmPartStatus) & kPartitionIsRealDeviceDriver)) {
- offs = (long long)__be32_to_cpu(par.pmPyPartStart) * bs;
- size = (long long)__be32_to_cpu(par.pmPartBlkCnt) * bs;
- offs = (long long)__be32_to_cpu(par.pmPyPartStart) * bs;
- size = (long long)__be32_to_cpu(par.pmPartBlkCnt) * bs;
- break;
- }
- parnum++;
} }
I remember last time I reworked this, I had to spend a lot of time reading the Apple HFS documentation with regard to this. Could you add a link to the documentation on the Apple site into the commit message, and confirm whether this is something I missed which is documented or it's new behaviour that you have discoverd through testing.
This is something I discovered through testing and carefully looking through the BootX source code. I don't know if there is documentation on this or not.
William Hahne
ATB,
Mark.
-- Mark Cave-Ayland - Senior Technical Architect PostgreSQL - PostGIS Sirius Corporation plc - control through freedom http://www.siriusit.co.uk t: +44 870 608 0063
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