UIO.H(3HEAD) Headers UIO.H(3HEAD)
NAME
uio.h, uio - definitions for vector I/O operations
SYNOPSIS
#include <
sys/uio.h>
DESCRIPTION
The <
sys/uio.h> header defines the
iovec structure, which includes
the following members:
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 */
The <
sys/uio.h> header uses the
iovec structure for scatter/gather
I/O.
The
ssize_t and
size_t types are defined as described in
<
sys/types.h>.
USAGE
The symbol {
IOV_MAX} defined in <
limits.h> 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.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
SEE ALSO
read(2),
write(2),
limits.h(3HEAD),
types.h(3HEAD),
attributes(7),
standards(7) September 10, 2004 UIO.H(3HEAD)
