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AIX system call kpread

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Operating Systems AIX AIX system call kpread
# 1  
Old 02-24-2014
AIX system call kpread
Hello all, I have been searching for days for the definition of a KPREAD with no success. I am using the truss command on AIX 6.1 to trace a process that I have to prove is not functioning properly. I would like to define what a KPREAD is in the description of the problem. Any help would be greatly appreciated. Thank you

excerpt of truss output ...
Code:
kpread(21, 0x070000000FEF9438, 4096, 0x0000000007E48000, 0x0FFFFFFFFFFFC764) = 4096
kpread(21, 0x070000000EE653A8, 4096, 0x0000000008067000, 0x0FFFFFFFFFFFC764) = 4096
kpread(21, 0x070000000FEFC440, 4096, 0x0000000008091000, 0x0FFFFFFFFFFFC764) = 4096
kpread(21, 0x070000000C2F7840, 4096, 0x000000000809A000, 0x0FFFFFFFFFFFC764) = 4096
kpread(21, 0x070000000B2F9840, 4096, 0x000000000809D000, 0x0FFFFFFFFFFFC764) = 4096
kpread(21, 0x070000000FF01440, 4096, 0x0000000008311000, 0x0FFFFFFFFFFFC764) = 4096

Last edited by Scott; 02-24-2014 at 01:56 PM.. Reason: Added code tags...
# 2  
Old 02-24-2014
I think it is a kernel function, not even a system call, which may be why you're having difficulty finding it.
# 3  
Old 02-24-2014
kpread is a classic read system call...look on the internet for source file
rdwr.c
# 4  
Old 02-25-2014
Thanks you for your responses. I was able to find a BaseSystemCalls.h on IBM's website which included kpread and kread. This and a few other search results leads me to believe kpread may be a system call regarding filesystem I/O while kread is physical I/O.

Code:
ssize_t kpread( int fd, void * buf, size_t len, ulong off1, ulong off2);

Code:
ssize_t kread(int fd,void * buf,size_t len);

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