Unit Test: refentry.012 iovec 9S iovec data storage structure for I/O using uio #include <sys/uio.h> Interface Level Architecture independent level 1 (DDI/DKI). Description An iovec structure describes a data storage area for transfer in a uio9S structure. Conceptually, it may be thought of as a base address and length specification. Structure Members 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 */