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.

       Available since kernel 6.7.

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)

liburing-2.5                                      July 14, 2023                          io_uring_prep_waitid(3)