.\" Copyright (c) 2022 by Alejandro Colomar <alx@kernel.org>
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.\"
.TH iovec 3type 2023-10-31 "Linux man-pages 6.7"
.SH NAME
iovec \- Vector I/O data structure
.SH LIBRARY
Standard C library
.RI ( libc )
.SH SYNOPSIS
.EX
.B #include <sys/uio.h>
.P
.B struct iovec {
.BR "    void   *iov_base;" "  /* Starting address */"
.BR "    size_t  iov_len;" "   /* Size of the memory pointed to by "\c
.IR iov_base ". */"
.B };
.EE
.SH DESCRIPTION
Describes a region of memory, beginning at
.I iov_base
address and with the size of
.I iov_len
bytes.
System calls use arrays of this structure,
where each element of the array represents a memory region,
and the whole array represents a vector of memory regions.
The maximum number of
.I iovec
structures in that array
is limited by
.B IOV_MAX
(defined in
.IR <limits.h> ,
or accessible via the call
.IR sysconf(_SC_IOV_MAX) ).
.SH STANDARDS
POSIX.1-2008.
.SH HISTORY
POSIX.1-2001.
.SH NOTES
The following header also provides this type:
.IR <sys/socket.h> .
.SH SEE ALSO
.BR process_madvise (2),
.BR readv (2)