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-'\" t
-.\" Copyright (c) 2009 Linux Foundation, written by Michael Kerrisk
-.\" <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH pthread_kill 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-pthread_kill \- send a signal to a thread
-.SH LIBRARY
-POSIX threads library
-.RI ( libpthread ", " \-lpthread )
-.SH SYNOPSIS
-.nf
-.B #include <signal.h>
-.P
-.BI "int pthread_kill(pthread_t " thread ", int " sig );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR pthread_kill ():
-.nf
- _POSIX_C_SOURCE >= 199506L || _XOPEN_SOURCE >= 500
-.fi
-.SH DESCRIPTION
-The
-.BR pthread_kill ()
-function sends the signal
-.I sig
-to
-.IR thread ,
-a thread in the same process as the caller.
-The signal is asynchronously directed to
-.IR thread .
-.P
-If
-.I sig
-is 0, then no signal is sent, but error checking is still performed.
-.SH RETURN VALUE
-On success,
-.BR pthread_kill ()
-returns 0;
-on error, it returns an error number, and no signal is sent.
-.SH ERRORS
-.TP
-.B EINVAL
-An invalid signal was specified.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR pthread_kill ()
-T} Thread safety MT-Safe
-.TE
-.SH VERSIONS
-The glibc implementation of
-.BR pthread_kill ()
-gives an error
-.RB ( EINVAL )
-on attempts to send either of the real-time signals
-used internally by the NPTL threading implementation.
-See
-.BR nptl (7)
-for details.
-.P
-POSIX.1-2008 recommends that if an implementation detects the use
-of a thread ID after the end of its lifetime,
-.BR pthread_kill ()
-should return the error
-.BR ESRCH .
-The glibc implementation returns this error in the cases where
-an invalid thread ID can be detected.
-But note also that POSIX says that an attempt to use a thread ID whose
-lifetime has ended produces undefined behavior,
-and an attempt to use an invalid thread ID in a call to
-.BR pthread_kill ()
-can, for example, cause a segmentation fault.
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001.
-.SH NOTES
-Signal dispositions are process-wide:
-if a signal handler is installed,
-the handler will be invoked in the thread
-.IR thread ,
-but if the disposition of the signal is "stop", "continue", or "terminate",
-this action will affect the whole process.
-.SH SEE ALSO
-.BR kill (2),
-.BR sigaction (2),
-.BR sigpending (2),
-.BR pthread_self (3),
-.BR pthread_sigmask (3),
-.BR raise (3),
-.BR pthreads (7),
-.BR signal (7)