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45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
#ifdef SG_KERNEL_INCLUDES
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#define __user
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typedef unsigned char u8;
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#include "/usr/src/linux/include/scsi/sg.h"
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#include "/usr/src/linux/include/scsi/scsi.h"
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#else
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#ifdef SG_TRICK_GNU_INCLUDES
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#include <linux/../scsi/sg.h>
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#include <linux/../scsi/scsi.h>
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#else
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#include <scsi/sg.h>
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#include <scsi/scsi.h>
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#endif
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#endif
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/*
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Getting the correct include files for the sg interface can be an ordeal.
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In a perfect world, one would just write:
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#include <scsi/sg.h>
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#include <scsi/scsi.h>
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This would include the files found in the /usr/include/scsi directory.
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Those files are maintained with the GNU library which may or may not
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agree with the kernel and version of sg driver that is running. Any
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many cases this will not matter. However in some it might, for example
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glibc 2.1's include files match the sg driver found in the lk 2.2
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series. Hence if glibc 2.1 is used with lk 2.4 then the additional
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sg v3 interface will not be visible.
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If this is a problem then defining SG_KERNEL_INCLUDES will access the
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kernel supplied header files (assuming they are in the normal place).
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The GNU library maintainers and various kernel people don't like
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this approach (but it does work).
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The technique selected by defining SG_TRICK_GNU_INCLUDES worked (and
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was used) prior to glibc 2.2 . Prior to that version /usr/include/linux
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was a symbolic link to /usr/src/linux/include/linux .
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There are other approaches if this include "mixup" causes pain. These
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would involve include files being copied or symbolic links being
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introduced.
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Sorry about the inconvenience. Typically neither SG_KERNEL_INCLUDES
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nor SG_TRICK_GNU_INCLUDES is defined.
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dpg 20010415, 20030522
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*/
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