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Mentioned in API description the impact of iso_write_opts_set_hfsplus()

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on System Area.
This commit is contained in:
Thomas Schmitt 2012-06-06 18:58:00 +02:00
parent cb3a6f8bb0
commit ad251e8c7d
1 changed files with 19 additions and 2 deletions
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21
libisofs/libisofs.h
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@ -1397,12 +1397,29 @@ int iso_write_opts_set_rockridge(IsoWriteOpts *opts, int enable);
int iso_write_opts_set_joliet(IsoWriteOpts *opts, int enable);
/**
* Whether to add the HFS+ to the image.
* Whether to add a HFS+ filesystem to the image which points to the same
* file content as the other directory trees.
* It will get marked by an Apple Partition Map in the System Area of the ISO
* image. This may collide with data submitted by
* iso_write_opts_set_system_area()
* and with settings made by
* el_torito_set_isolinux_options()
* The first 8 bytes of the System Area get overwritten by
* {0x45, 0x52, 0x08 0x00, 0xeb, 0x02, 0xff, 0xff}
* which can be executed as x86 machine code without negative effects.
* So if an MBR gets combined with this feature, then its first 8 bytes
* should contain no essential commands.
* The next blocks of 2 KiB in the System Area will be occupied by APM entries.
* The first one covers the part of the ISO image before the HFS+ filesystem
* metadata. The second one marks the range from HFS+ metadata to the end
* of file content data. If more ISO image data follow, then a third partition
* entry gets produced. Other features of libisofs might cause the need for
* more APM entries.
*
* @param opts
* The option set to be manipulated.
* @param enable
* 1 to enable HFS+ extension, 0 to not add them
* 1 to enable HFS+ extension, 0 to not add HFS+ metadata and APM
* @return
* 1 success, < 0 error
*