io_uring_prep_send(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | COLOPHON

io_uring_prep_send(3)        liburing Manual       io_uring_prep_send(3)

NAME         top

       io_uring_prep_send - prepare a send request

SYNOPSIS         top

       #include <liburing.h>

       void io_uring_prep_send(struct io_uring_sqe *sqe,
                               int sockfd,
                               const void *buf,
                               size_t len,
                               int flags);

       void io_uring_prep_sendto(struct io_uring_sqe *sqe,
                                 int sockfd,
                                 const void *buf,
                                 size_t len,
                                 int flags,
                                 const struct sockaddr *addr,
                                 socklen_t addrlen);

DESCRIPTION         top

       The io_uring_prep_send(3) function prepares a send request. The
       submission queue entry sqe is setup to use the file descriptor
       sockfd to start sending the data from buf of size len bytes and
       with modifier flags flags.

       Note that using IOSQE_IO_LINK with this request type requires the
       setting of MSG_WAITALL in the flags argument, as a short send
       isn't a considered an error condition without that being set.

       This function prepares an async send(2) request. See that man
       page for details.

       The io_uring_prep_sendto(3) function prepares a sendto request.
       The submission queue entry sqe is setup to use the file
       descriptor sockfd to start sending the data from buf of size len
       bytes and with modifier flags flags.  The destination address is
       specified by addr and addrlen and must be a valid address for the
       socket type.

       This function prepares an async sendto(2) request. See that man
       page for details.

RETURN VALUE         top

       None

ERRORS         top

       The CQE res field will contain the result of the operation. See
       the related man page for details on possible values. Note that
       where synchronous system calls will return -1 on failure and set
       errno to the actual error value, io_uring never uses errno.
       Instead it returns the negated errno directly in the CQE res
       field.

SEE ALSO         top

       io_uring_get_sqe(3), io_uring_submit(3), send(2) sendto(2)

COLOPHON         top

       This page is part of the liburing (A library for io_uring)
       project.  Information about the project can be found at 
       ⟨https://github.com/axboe/liburing⟩.  If you have a bug report for
       this manual page, send it to io-uring@vger.kernel.org.  This page
       was obtained from the project's upstream Git repository
       ⟨https://github.com/axboe/liburing⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-12-19.)  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 is not part of the original manual page), send a mail to
       man-pages@man7.org

liburing-2.2                 March 12, 2022        io_uring_prep_send(3)

Pages that refer to this page: io_uring_prep_send(3)io_uring_prep_send_set_addr(3)io_uring_prep_sendto(3)io_uring_prep_send_zc(3)io_uring_prep_send_zc_fixed(3)