mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-02 08:42:48 +00:00
8269e7673c
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
138 lines
3.5 KiB
Groff
138 lines
3.5 KiB
Groff
.\" Copyright (c) 2016 The FreeBSD Foundation, Inc.
|
|
.\"
|
|
.\" This documentation was written by
|
|
.\" Konstantin Belousov <kib@FreeBSD.org> under sponsorship
|
|
.\" from the FreeBSD Foundation.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.Dd May 5, 2020
|
|
.Dt THR_kill 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm thr_kill
|
|
.Nd send signal to thread
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/thr.h
|
|
.Ft int
|
|
.Fn thr_kill "long id" "int sig"
|
|
.Ft int
|
|
.Fn thr_kill2 "pid_t pid" "long id" "int sig"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn thr_kill
|
|
and
|
|
.Fn thr_kill2
|
|
system calls allow sending a signal, specified by the
|
|
.Fa sig
|
|
argument, to some threads in a process.
|
|
For the
|
|
.Fn thr_kill
|
|
function, signalled threads are always limited to the current process.
|
|
For the
|
|
.Fn thr_kill2
|
|
function, the
|
|
.Fa pid
|
|
argument specifies the process with threads to be signalled.
|
|
.Pp
|
|
The
|
|
.Fa id
|
|
argument specifies which threads get the signal.
|
|
If
|
|
.Fa id
|
|
is equal to \-1, all threads in the specified process are signalled.
|
|
Otherwise, only the thread with the thread identifier equal to the
|
|
argument is signalled.
|
|
.Pp
|
|
The
|
|
.Fa sig
|
|
argument defines the delivered signal.
|
|
It must be a valid signal number or zero.
|
|
In the latter case no signal is actually sent, and the call is used to
|
|
verify the liveness of the thread.
|
|
.Pp
|
|
The signal is delivered with
|
|
.Dv siginfo
|
|
.Dv si_code
|
|
set to
|
|
.Dv SI_LWP .
|
|
.Sh RETURN VALUES
|
|
If successful,
|
|
.Fn thr_kill
|
|
and
|
|
.Fn thr_kill2
|
|
will return zero, otherwise \-1 is returned, and
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
The
|
|
.Fn thr_kill
|
|
and
|
|
.Fn thr_kill2
|
|
operations return the following errors:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa sig
|
|
argument is not zero and does not specify valid signal.
|
|
.It Bq Er ESRCH
|
|
The specified process or thread was not found.
|
|
.El
|
|
.Pp
|
|
Additionally, the
|
|
.Fn thr_kill2
|
|
may return the following errors:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EPERM
|
|
The current process does not have sufficient privilege to check existence or
|
|
send a signal to the specified process.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr kill 2 ,
|
|
.Xr thr_exit 2 ,
|
|
.Xr thr_new 2 ,
|
|
.Xr thr_self 2 ,
|
|
.Xr thr_set_name 2 ,
|
|
.Xr _umtx_op 2 ,
|
|
.Xr pthread_kill 3 ,
|
|
.Xr signal 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn thr_kill
|
|
and
|
|
.Fn thr_kill2
|
|
system calls are non-standard and are used by the
|
|
.Lb libthr
|
|
to implement
|
|
.St -p1003.1-2001
|
|
.Xr pthread 3
|
|
functionality.
|
|
.Sh HISTORY
|
|
The
|
|
.Fn thr_kill
|
|
and
|
|
.Fn thr_kill2
|
|
system calls first appeared in
|
|
.Fx 5.2 .
|