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  18 .Dd July 9, 2018
  19 .Dt IOVEC 9S
  20 .Os
  21 .Sh NAME
  22 .Nm iovec
  23 .Nd data storage structure for I/O using uio
  24 .Sh SYNOPSIS
  25 .In sys/uio.h
  26 .Sh INTERFACE LEVEL
  27 Architecture independent level 1 (DDI/DKI).
  28 .Sh DESCRIPTION
  29 An
  30 .Vt iovec
  31 structure describes a data storage area for transfer in a
  32 .Xr uio 9S
  33 structure.
  34 Conceptually, it can be thought of as a base address
  35 and length specification.
  36 .Sh STRUCTURE MEMBERS
  37 .Bd -literal -offset 2n
  38 caddr_t    iov_base;  /* base address of the data storage area */
  39                       /* represented by the iovec structure */
  40 int        iov_len;   /* size of the data storage area in bytes */
  41 .Ed
  42 .Sh SEE ALSO
  43 .Xr uio 9S
  44 .Rs
  45 .%T Writing Device Drivers
  46 .Re