kqueue.2: Fix reference to unexisting kevent1()

kqueue1() was meant.

While here, make the wording in the AUTHORS section more clear.

PR: 291908
Fixes: 9b1585384d53 ("kqueue.2: Editorial pass")
R

kqueue.2: Fix reference to unexisting kevent1()

kqueue1() was meant.

While here, make the wording in the AUTHORS section more clear.

PR: 291908
Fixes: 9b1585384d53 ("kqueue.2: Editorial pass")
Reviewed by: kib, dab
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D54858

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kqueue.2: document KQUEUE_CPONFORK

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D52045

jaildesc: add kevent support

Give jail descriptors the same kevent flags as jails. Also fix the
event reporting in jails, where it was including data for events the
user didn't ask for.

MFC after:

jaildesc: add kevent support

Give jail descriptors the same kevent flags as jails. Also fix the
event reporting in jails, where it was including data for events the
user didn't ask for.

MFC after: 3 days

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jail: simplify EVFILT_JAIL events

Instead of using the EVFILT_PROC model of attempting to automatically
register new events when a child jail is created, just give a single
event when a child jail i

jail: simplify EVFILT_JAIL events

Instead of using the EVFILT_PROC model of attempting to automatically
register new events when a child jail is created, just give a single
event when a child jail is created. As was already done with jail
attach events, make a best-effort report of the added jail's id in
kn_data. If the are multiple NOTE_JAIL_CHILD and/or NOTE_JAIL_ATTACH
events, set the NOTE_JAIL_MULTI flag, and don't report anything in
data, indicating that the caller will need to query the system state
on their own.

MFC after: 3 days

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jail: add kqueue(2) support for jails

Add kqueue tracking to jails, inspired by how it's done with processes.
EVFILT_JAIL takes a jail ID, and tracks with NOTE_JAIL_SET,
NOTE_JAIL_ATTACH, NOTE_JAIL_

jail: add kqueue(2) support for jails

Add kqueue tracking to jails, inspired by how it's done with processes.
EVFILT_JAIL takes a jail ID, and tracks with NOTE_JAIL_SET,
NOTE_JAIL_ATTACH, NOTE_JAIL_REMOVE, and NOTE_JAIL_CHILD. It also uses
the NOTE_TRACK mechanism that EVFILT_PROC uses, using the same result
flags (NOTE_CHILD and NOTE_TRACKERR).

Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D51940

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kqueue.2: Editorial pass

- Use consistent language to describe user values unchanged by the
kernel.

- Replace passive language with active in a few places.

- Add a history note for kqueuex() and

kqueue.2: Editorial pass

- Use consistent language to describe user values unchanged by the
kernel.

- Replace passive language with active in a few places.

- Add a history note for kqueuex() and kqueue1().

- Add an MLINK and synopsis for kqueue1().

- Various wording and markup tweaks.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D48203

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libsys: relocate implementations and manpages

Remove core system call implementations and documentation to lib/libsys
and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>.
Update paths

libsys: relocate implementations and manpages

Remove core system call implementations and documentation to lib/libsys
and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>.
Update paths to allow libc to find them in their new home.

Reviewed by: kib, emaste, imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/908

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Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

Change kqueue1() to be compatible with NetBSD

by making it accept some open(2) flags. More precisely, only
O_CLOEXEC is supported, the flag is translated into the KQUEUE_CLOEXEC flag
for kqueuex(2)

Change kqueue1() to be compatible with NetBSD

by making it accept some open(2) flags. More precisely, only
O_CLOEXEC is supported, the flag is translated into the KQUEUE_CLOEXEC flag
for kqueuex(2), and O_NONBLOCK is silently ignored.

Reported and tested by: vishwin
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39377

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kqueue: add close() calls to man page example

There is no real need to close descriptors before a process exits, but
these close calls demonstrate by example that kqueue descriptors occupy
the same

kqueue: add close() calls to man page example

There is no real need to close descriptors before a process exits, but
these close calls demonstrate by example that kqueue descriptors occupy
the same namespace as other file descriptors.

Reviewed by: fernape, markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39376

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Rename kqueue1(2) to kqueuex(2) to avoid compat issues with NetBSD

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39377

kqueue: tidy up indentation in man page example

Fixes: e07b0c12ba64 ("[patch][doc] Fix EXAMPLE in kqueue(2)")
Sponsored by: The FreeBSD Foundation

kqueue1(2): document

Reviewed by: emaste, jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39271

kevent.2: Add an xref to listen.2

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

kqueue: Fix kqueue(2) man page.

Remove bogus BUGS note about timeout limit to 24 hours, that's not true
since callouting project import.

Reviewed by: mav
Differential revision: https://reviews.fre

kqueue: Fix kqueue(2) man page.

Remove bogus BUGS note about timeout limit to 24 hours, that's not true
since callouting project import.

Reviewed by: mav
Differential revision: https://reviews.freebsd.org/D35206
MFC after: 2 weeks

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[patch][doc] Fix EXAMPLE in kqueue(2)

The error control was not properly implemented. "changelist" is const, hence
event.flags is never changed by the syscall.

PR: 196844
Reported by: eugen@
Review

[patch][doc] Fix EXAMPLE in kqueue(2)

The error control was not properly implemented. "changelist" is const, hence
event.flags is never changed by the syscall.

PR: 196844
Reported by: eugen@
Reviewed by: PauAmma <pauamma@gundo.com>
Approved by: eugen@
Fixes: 8c231786f01b9f8614e2fe5b47196db1caa7a772

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kqueue(2): Add note about format of the data for NOTE_EXIT

Noted by: Dave Baukus <daveb@spectralogic.com>
PR: 261346
MFC after: 3 days
Sponsored by: The FreeBSD Foundation

bpf: Fix the write filter for detached descriptors

A BPF descriptor only has an associated interface descriptor once it is
attached to an interface, e.g., with BIOCSETIF. Avoid dereferencing a
NULL

bpf: Fix the write filter for detached descriptors

A BPF descriptor only has an associated interface descriptor once it is
attached to an interface, e.g., with BIOCSETIF. Avoid dereferencing a
NULL pointer in filt_bpfwrite() if the BPF descriptor is not attached.

Reviewed by: ae
Reported by: syzbot+ae45d5166afe15a5a21d@syzkaller.appspotmail.com
Fixes: ded77e0237a8 ("Allow the BPF to be select for write.")
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D32561

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Allow the BPF to be select for write. This is needed for boost:asio
which otherwise fails to handle BPFs.
Reviewed by: ae
Differential Revision: https://reviews.freebsd.org/D31967

kqueue: clean up some igor and mandoc -Tlint warnings

kqueue: document how timers with low/past timeouts are handled

Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D32237

kqueue: Add EV_KEEPUDATA flag

When this flag is set, operations that update an existing kevent will
not change the udata field. This can be used to NOTE_TRIGGER or
EV_{EN,DIS}ABLE events without ov

kqueue: Add EV_KEEPUDATA flag

When this flag is set, operations that update an existing kevent will
not change the udata field. This can be used to NOTE_TRIGGER or
EV_{EN,DIS}ABLE events without overwriting the stashed pointer.

Reviewed by: Domagoj Stolfa <domagoj.stolfa@gmail.com>
Obtained from: CheriBSD
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D30286

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kqueue.2: Document the fact that EVFILT_READ can be used on kqueues

Reviewed by: bcr, kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3

kqueue.2: Document the fact that EVFILT_READ can be used on kqueues

Reviewed by: bcr, kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31864

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kevent: Prohibit negative change and event list lengths

Previously, a negative change list length would be treated the same as
an empty change list. A negative event list length would result in
bog

kevent: Prohibit negative change and event list lengths

Previously, a negative change list length would be treated the same as
an empty change list. A negative event list length would result in
bogus copyouts. Make kevent(2) return EINVAL for both cases so that
application bugs are more easily found, and to be more robust against
future changes to kevent internals.

Reviewed by: imp, kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30480

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Document eventfd().

Submitted by: greg@unrelenting.technology
Reviewed by: bcr, markj (previous version)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D26668