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.\"
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.\" in the SunOS Reference Manual, from IEEE Std 1003.1, 2004 Edition,
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.\" Interface (POSIX), The Open Group Base Specifications Issue 6,
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.\"
.TH UIO.H 3HEAD "Sep 10, 2004"
.SH NAME
uio.h, uio \- definitions for vector I/O operations
.SH SYNOPSIS
.LP
.nf
#include <\fBsys/uio.h\fR>
.fi
.SH DESCRIPTION
.sp
.LP
The <\fBsys/uio.h\fR> header defines the \fBiovec\fR structure, which includes
the following members:
.sp
.in +2
.nf
void *iov_base /* base address of a memory region
for input or output */
size_t iov_len /* size of the memory pointed to by
iov_base */
.fi
.in -2
.sp
.LP
The <\fBsys/uio.h\fR> header uses the \fBiovec\fR structure for scatter/gather
I/O.
.sp
.LP
The \fBssize_t\fR and \fBsize_t\fR types are defined as described in
<\fBsys/types.h\fR>.
.SH USAGE
.sp
.LP
The symbol {\fBIOV_MAX\fR} defined in <\fBlimits.h\fR> should always be used to
learn about the limits on the number of scatter/gather elements that can be
processed in one call, instead of assuming a fixed value.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp
.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
_
Interface Stability Standard
.TE
.SH SEE ALSO
.sp
.LP
\fBread\fR(2), \fBwrite\fR(2), \fBlimits.h\fR(3HEAD), \fBtypes.h\fR(3HEAD),
\fBattributes\fR(5), \fBstandards\fR(5)
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