Section: POSIX Programmer's Manual (3P)
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
--- send a signal to a thread
int pthread_kill(pthread_t thread, int sig);
function shall request that a signal be delivered to the specified
is zero, error checking shall be performed but no signal shall
actually be sent.
Upon successful completion, the function shall return a value of zero.
Otherwise, the function shall return an error number. If the
function fails, no signal shall be sent.
function shall fail if:
The value of the
argument is an invalid or unsupported signal number.
function shall not return an error code of
The following sections are informative.
function provides a mechanism for asynchronously directing a signal at
a thread in the calling process. This could be used, for example, by
one thread to affect broadcast delivery of a signal to a set of
only causes the signal to be handled in the context of the given
thread; the signal action (termination or stopping) affects the
process as a whole.
If an implementation detects use of a thread ID after the end of its
lifetime, it is recommended that the function should fail and report an
The Base Definitions volume of POSIX.1-2008,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
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