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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | COLOPHON |
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io_uring_prep_waitid(3) liburing Manual io_uring_prep_waitid(3)
io_uring_prep_waitid - prepare a waitid request
#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);
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.
None
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.
io_uring_get_sqe(3), io_uring_submit(3), waitid(2)
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-2.5 July 14, 2023 io_uring_prep_waitid(3)
Pages that refer to this page: io_uring_prep_waitid(3)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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