io_uring_prep_waitid(3) — Linux manual page

io_uring_prep_waitid(3)      liburing Manual     io_uring_prep_waitid(3)

NAME

       io_uring_prep_waitid - prepare a waitid request

SYNOPSIS

       #include <sys/wait.h>
       #include <liburing.h>

       void io_uring_prep_waitid(struct io_uring_sqe *sqe,
                                 idtype_t idtype,
                                 id_t id,
                                 siginfo_t *infop,
                                 int options,
                                 unsigned int flags);

DESCRIPTION

       The io_uring_prep_waitid(3) function prepares a waitid request.
       The submission queue entry sqe is setup to use the idtype and id
       arguments select the child(ren), and options to specify the child
       state changes to wait for. Upon successful return, it fills infop
       with information of the child process, if any.  flags is io_uring
       specific modifier flags. They are currently unused, and hence 0
       should be passed.

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

RETURN VALUE

       None

ERRORS

       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

       io_uring_get_sqe(3), io_uring_submit(3), waitid(2)

COLOPHON

       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 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-03.)  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-2.5                  July 14, 2023      io_uring_prep_waitid(3)

Pages that refer to this page: io_uring_prep_waitid(3)

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