NAME

       pthread_kill - send a signal to a thread

SYNOPSIS

       #include <signal.h>

       int pthread_kill(pthread_t thread, int sig);

DESCRIPTION

       The  pthread_kill()  function  shall  request  that a signal be delivered to the specified
       thread.

       As in kill(), if sig is zero, error checking  shall  be  performed  but  no  signal  shall
       actually be sent.

RETURN VALUE

       Upon  successful  completion,  the  function shall return a value of zero.  Otherwise, the
       function shall return an error number. If the pthread_kill()  function  fails,  no  signal
       shall be sent.

ERRORS

       The pthread_kill() function shall fail if:

       ESRCH  No thread could be found corresponding to that specified by the given thread ID.

       EINVAL The value of the sig argument is an invalid or unsupported signal number.

       The pthread_kill() function shall not return an error code of [EINTR].

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The  pthread_kill() 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 threads.

       Note  that pthread_kill() 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.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       kill() , pthread_self() , raise() , the Base Definitions volume  of  IEEE Std 1003.1-2001,
       <signal.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  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 http://www.opengroup.org/unix/online.html .