io_uring_prep_waitid(3) — Linux manual page


io_uring_prep_waitid(3)      liburing Manual     io_uring_prep_waitid(3)

NAME         top

       io_uring_prep_waitid - prepare a waitid request

SYNOPSIS         top

       #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         top

       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         top


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

SEE ALSO         top

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

COLOPHON         top

       This page is part of the liburing (A library for io_uring)
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       was obtained from the project's upstream Git repository
       ⟨⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
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liburing-2.5                  July 14, 2023      io_uring_prep_waitid(3)

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