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iovec(3type) — Linux manual page

iovec(3type)iovec(3type)

NAME        top

       iovec - Vector I/O data structure

LIBRARY        top

       Standard C library (libc)

SYNOPSIS        top

#include <sys/uio.h>struct iovec {void   *iov_base;/* Starting address */size_t  iov_len;/* Size of the memory pointed to byiov_base. */};

DESCRIPTION        top

       Describes a region of memory, beginning atiov_base address and       with the size ofiov_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 ofiovec structures in that array is limited byIOV_MAX(defined in<limits.h>, or accessible via the callsysconf(_SC_IOV_MAX)).

STANDARDS        top

       POSIX.1-2008.

HISTORY        top

       POSIX.1-2001.

NOTES        top

       The following header also provides this type:<sys/socket.h>.

SEE ALSO        top

process_madvise(2),readv(2)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17iovec(3type)

Pages that refer to this page:KEYCTL_INSTANTIATE(2const), process_madvise(2), process_vm_readv(2), readv(2), vmsplice(2)

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