tkill, tgkill — send a signal to a thread
|There are no glibc wrappers for these system calls; see NOTES.|
tgkill() sends the signal
sig to the thread
with the thread ID
tid in the thread group
tgid. (By contrast,
kill(2) can be used to send
a signal only to a process (i.e., thread group) as a whole,
and the signal will be delivered to an arbitrary thread
within that process.)
tkill() is an obsolete
allows only 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
These are the raw system call interfaces, meant for internal thread library use.
On success, zero is returned. On error, −1 is
errno is set
An invalid thread ID, thread group ID, or signal was specified.
Permission denied. For the required permissions, see kill(2).
No process with the specified thread ID (and thread group ID) exists.
tgkill() are Linux-specific and should not
be used in programs that are intended to be portable.
See the description of
CLONE_THREAD in clone(2) for an explanation
of thread groups.
Glibc does not provide wrappers for these system calls; call them using syscall(2).
This page is part of release 4.07 of the Linux
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description of the project, information about reporting bugs,
and the latest version of this page, can be found at
Copyright (C) 2008 Michael Kerrisk <tmk.manpagesgmail.com>
and Copyright 2003 Abhijit Menon-Sen <amswiw.org>
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2004-05-31, added tgkill, ahu, aeb
2008-01-15 mtk -- rewrote DESCRIPTION