2004-11-03 13:51:07 +00:00
|
|
|
.\" Hey Emacs! This file is -*- nroff -*- source.
|
|
|
|
|
.\"
|
2008-01-12 17:38:58 +00:00
|
|
|
.\" Copyright (C) 2008 Michael Kerrisk <tmk.manpages@gmail.com>
|
|
|
|
|
.\" and Copyright 2003 Abhijit Menon-Sen <ams@wiw.org>
|
|
|
|
|
.\"
|
2004-11-03 13:51:07 +00:00
|
|
|
.\" Permission is granted to make and distribute verbatim copies of this
|
|
|
|
|
.\" manual provided the copyright notice and this permission notice are
|
|
|
|
|
.\" preserved on all copies.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Permission is granted to copy and distribute modified versions of this
|
|
|
|
|
.\" manual under the conditions for verbatim copying, provided that the
|
|
|
|
|
.\" entire resulting derived work is distributed under the terms of a
|
|
|
|
|
.\" permission notice identical to this one.
|
2007-04-12 22:42:49 +00:00
|
|
|
.\"
|
2004-11-03 13:51:07 +00:00
|
|
|
.\" Since the Linux kernel and libraries are constantly changing, this
|
|
|
|
|
.\" manual page may be incorrect or out-of-date. The author(s) assume no
|
|
|
|
|
.\" responsibility for errors or omissions, or for damages resulting from
|
|
|
|
|
.\" the use of the information contained herein. The author(s) may not
|
|
|
|
|
.\" have taken the same level of care in the production of this manual,
|
|
|
|
|
.\" which is licensed free of charge, as they might when working
|
|
|
|
|
.\" professionally.
|
2007-04-12 22:42:49 +00:00
|
|
|
.\"
|
2004-11-03 13:51:07 +00:00
|
|
|
.\" Formatted or processed versions of this manual, if unaccompanied by
|
|
|
|
|
.\" the source, must acknowledge the copyright and authors of this work.
|
|
|
|
|
.\"
|
|
|
|
|
.\" 2004-05-31, added tgkill, ahu, aeb
|
2008-01-12 17:38:58 +00:00
|
|
|
.\" 2008-01-15 mtk -- rewote DESCRIPTION
|
2004-11-03 13:51:07 +00:00
|
|
|
.\"
|
2011-09-18 04:32:36 +00:00
|
|
|
.TH TKILL 2 2011-09-18 "Linux" "Linux Programmer's Manual"
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH NAME
|
2008-01-12 17:38:58 +00:00
|
|
|
tkill, tgkill \- send a signal to a thread
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH SYNOPSIS
|
|
|
|
|
.nf
|
2007-05-26 15:22:28 +00:00
|
|
|
.BI "int tkill(int " tid ", int " sig );
|
2004-11-03 13:51:07 +00:00
|
|
|
.sp
|
2007-05-26 15:22:28 +00:00
|
|
|
.BI "int tgkill(int " tgid ", int " tid ", int " sig );
|
2004-11-03 13:51:07 +00:00
|
|
|
.fi
|
|
|
|
|
.SH DESCRIPTION
|
2007-05-12 09:06:04 +00:00
|
|
|
.BR tgkill ()
|
2008-01-12 17:38:58 +00:00
|
|
|
sends the signal
|
|
|
|
|
.I sig
|
|
|
|
|
to the thread with the thread ID
|
|
|
|
|
.I tid
|
|
|
|
|
in the thread group
|
|
|
|
|
.IR tgid .
|
|
|
|
|
(By contrast,
|
|
|
|
|
.BR kill (2)
|
|
|
|
|
can only be used to send a signal to a process (i.e., thread group)
|
|
|
|
|
as a whole, and the signal will be delivered to an arbitrary
|
|
|
|
|
thread within that process.)
|
|
|
|
|
|
2007-05-12 09:06:04 +00:00
|
|
|
.BR tkill ()
|
2008-01-12 17:38:58 +00:00
|
|
|
is an obsolete predecessor to
|
|
|
|
|
.BR tgkill ().
|
|
|
|
|
It only allows the target thread ID to be specified,
|
|
|
|
|
which may result in the wrong thread being signaled if a thread
|
|
|
|
|
terminates and its thread ID is recycled.
|
|
|
|
|
Avoid using this system call.
|
|
|
|
|
|
|
|
|
|
If
|
|
|
|
|
.I tgid
|
|
|
|
|
is specified as \-1,
|
2007-05-12 09:06:04 +00:00
|
|
|
.BR tgkill ()
|
2008-01-12 17:38:58 +00:00
|
|
|
is equivalent to
|
2007-05-12 09:06:04 +00:00
|
|
|
.BR tkill ().
|
2008-01-12 17:38:58 +00:00
|
|
|
|
2004-11-03 13:51:07 +00:00
|
|
|
These are the raw system call interfaces, meant for internal
|
|
|
|
|
thread library use.
|
|
|
|
|
.SH "RETURN VALUE"
|
2007-04-12 22:42:49 +00:00
|
|
|
On success, zero is returned.
|
|
|
|
|
On error, \-1 is returned, and \fIerrno\fP
|
2004-11-03 13:51:07 +00:00
|
|
|
is set appropriately.
|
|
|
|
|
.SH ERRORS
|
|
|
|
|
.TP
|
|
|
|
|
.B EINVAL
|
2008-10-01 14:46:11 +00:00
|
|
|
An invalid thread ID, thread group ID, or signal was specified.
|
2004-11-03 13:51:07 +00:00
|
|
|
.TP
|
|
|
|
|
.B EPERM
|
2007-04-12 22:42:49 +00:00
|
|
|
Permission denied.
|
|
|
|
|
For the required permissions, see
|
2004-11-03 13:51:07 +00:00
|
|
|
.BR kill (2).
|
|
|
|
|
.TP
|
|
|
|
|
.B ESRCH
|
|
|
|
|
No process with the specified thread ID (and thread group ID) exists.
|
2007-05-18 16:30:46 +00:00
|
|
|
.SH VERSIONS
|
|
|
|
|
.BR tkill ()
|
|
|
|
|
is supported since Linux 2.4.19 / 2.5.4.
|
|
|
|
|
.BR tgkill ()
|
|
|
|
|
was added in Linux 2.5.75.
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH "CONFORMING TO"
|
2007-05-12 09:06:04 +00:00
|
|
|
.BR tkill ()
|
|
|
|
|
and
|
|
|
|
|
.BR tgkill ()
|
2007-12-25 21:28:09 +00:00
|
|
|
are Linux-specific and should not be used
|
2004-11-03 13:51:07 +00:00
|
|
|
in programs that are intended to be portable.
|
2007-05-26 15:22:28 +00:00
|
|
|
.SH NOTES
|
2008-01-12 17:38:58 +00:00
|
|
|
See the description of
|
|
|
|
|
.B CLONE_THREAD
|
|
|
|
|
in
|
|
|
|
|
.BR clone (2)
|
|
|
|
|
for an explanation of thread groups.
|
|
|
|
|
|
2008-01-12 16:30:12 +00:00
|
|
|
Glibc does not provide wrappers for these system calls; call them using
|
2007-05-26 15:22:28 +00:00
|
|
|
.BR syscall (2).
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH "SEE ALSO"
|
2008-01-12 17:38:58 +00:00
|
|
|
.BR clone (2),
|
|
|
|
|
.BR gettid (2),
|
2011-09-18 04:32:36 +00:00
|
|
|
.BR kill (2),
|
|
|
|
|
.BR rt_sigqueueinfo (2)
|
