1 #ifndef SG_LINUX_INC_H 2 #define SG_LINUX_INC_H 3 4 #ifdef SG_KERNEL_INCLUDES 5 #define __user 6 typedef unsigned char u8; 7 #include "/usr/src/linux/include/scsi/sg.h" 8 #include "/usr/src/linux/include/scsi/scsi.h" 9 #else 10 #ifdef SG_TRICK_GNU_INCLUDES 11 #include <linux/../scsi/sg.h> 12 #include <linux/../scsi/scsi.h> 13 #else 14 #include <scsi/sg.h> 15 #include <scsi/scsi.h> 16 #endif 17 #endif 18 19 #ifdef BLKGETSIZE64 20 #ifndef u64 21 #include <stdint.h> /* C99 header for exact integer types */ 22 typedef uint64_t u64; /* problems with BLKGETSIZE64 ioctl in lk 2.4 */ 23 #endif 24 #endif 25 26 /* 27 Getting the correct include files for the sg interface can be an ordeal. 28 In a perfect world, one would just write: 29 #include <scsi/sg.h> 30 #include <scsi/scsi.h> 31 This would include the files found in the /usr/include/scsi directory. 32 Those files are maintained with the GNU library which may or may not 33 agree with the kernel and version of sg driver that is running. Any 34 many cases this will not matter. However in some it might, for example 35 glibc 2.1's include files match the sg driver found in the lk 2.2 36 series. Hence if glibc 2.1 is used with lk 2.4 then the additional 37 sg v3 interface will not be visible. 38 If this is a problem then defining SG_KERNEL_INCLUDES will access the 39 kernel supplied header files (assuming they are in the normal place). 40 The GNU library maintainers and various kernel people don't like 41 this approach (but it does work). 42 The technique selected by defining SG_TRICK_GNU_INCLUDES worked (and 43 was used) prior to glibc 2.2 . Prior to that version /usr/include/linux 44 was a symbolic link to /usr/src/linux/include/linux . 45 46 There are other approaches if this include "mixup" causes pain. These 47 would involve include files being copied or symbolic links being 48 introduced. 49 50 Sorry about the inconvenience. Typically neither SG_KERNEL_INCLUDES 51 nor SG_TRICK_GNU_INCLUDES is defined. 52 53 dpg 20010415, 20030522 54 */ 55 56 #endif 57
