osx man page for geterror

geterror(9F)						   Kernel Functions for Drivers 					      geterror(9F)

NAME

       geterror - return I/O error

SYNOPSIS

       #include <sys/types.h>
       #include <sys/buf.h>
       #include <sys/ddi.h>

       int geterror(struct buf *bp);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       bp	Pointer to a buf(9S) structure.

DESCRIPTION

       geterror() returns the error number  from the error field of the  buffer header structure.

RETURN VALUES

       An error number indicating the error condition of the I/O request is  returned. If the I/O request completes successfully,  0 is returned.

CONTEXT

       geterror() can be called from user or interrupt context.

SEE ALSO

       buf(9S)

       Writing Device Drivers

SunOS 5.10							    11 Apr 1991 						      geterror(9F)