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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:22 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:22 +0000 |
| commit | 3d08cd331c1adcf0d917392f7e527b3f00511748 (patch) | |
| tree | 312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man/man2/ioctl_pipe.2 | |
| parent | Adding debian version 6.7-2. (diff) | |
| download | manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip | |
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man/man2/ioctl_pipe.2')
| -rw-r--r-- | man/man2/ioctl_pipe.2 | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/man/man2/ioctl_pipe.2 b/man/man2/ioctl_pipe.2 new file mode 100644 index 0000000..f895142 --- /dev/null +++ b/man/man2/ioctl_pipe.2 @@ -0,0 +1,64 @@ +.\" Copyright (c) 2022 by Cyril Hrubis <chrubi@suse.cz> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH ioctl_pipe 2 2024-05-02 "Linux man-pages (unreleased)" +.SH NAME +ioctl_pipe \- ioctl() operations for General notification mechanism +.SH SYNOPSIS +.nf +.BR "#include <linux/watch_queue.h>" " /* Definition of " IOC_WATCH_QUEUE_ "* */" +.B #include <sys/ioctl.h> +.P +.BI "int ioctl(int " pipefd "[1], IOC_WATCH_QUEUE_SET_SIZE, int " size ); +.BI "int ioctl(int " pipefd "[1], IOC_WATCH_QUEUE_SET_FILTER," +.BI " struct watch_notification_filter *" filter ); +.fi +.SH DESCRIPTION +The following +.BR ioctl (2) +operations are provided to set up general notification queue parameters. +The notification queue is built on the top of a +.BR pipe (2) +opened with the +.B O_NOTIFICATION_PIPE +flag. +.TP +.BR IOC_WATCH_QUEUE_SET_SIZE " (since Linux 5.8)" +.\" commit c73be61cede5882f9605a852414db559c0ebedfd +Preallocates the pipe buffer memory so that +it can fit +.I size +notification messages. +Currently, +.I size +must be between 1 and 512. +.TP +.BR IOC_WATCH_QUEUE_SET_FILTER " (since Linux 5.8)" +.\" commit c73be61cede5882f9605a852414db559c0ebedfd +Watch queue filter can limit events that are received. +Filters are passed in a +.I struct watch_notification_filter +and each filter is described by a +.I struct watch_notification_type_filter +structure. +.IP +.in +4n +.EX +struct watch_notification_filter { + __u32 nr_filters; + __u32 __reserved; + struct watch_notification_type_filter filters[]; +}; +\& +struct watch_notification_type_filter { + __u32 type; + __u32 info_filter; + __u32 info_mask; + __u32 subtype_filter[8]; +}; +.EE +.in +.SH SEE ALSO +.BR pipe (2), +.BR ioctl (2) |