Unit Test: refentry.012
data storage structure for I/O using uio
Architecture independent level 1 (DDI/DKI).
iovec structure describes a data
storage area for transfer in a
structure. Conceptually, it may be thought of as
a base address and length specification.
caddr_t iov_base; /* base address of the data storage area */
/* represented by the iovec structure */
int iov_len; /* size of the data storage area in bytes */