thr_kill(3c) [x11r4 man page]

thr_kill(3C)                                                                                                                          thr_kill(3C)

NAME

       thr_kill - send a signal to a thread

SYNOPSIS

       cc -mt [ flag... ] file... [ library... ]

       #include <signal.h>
       #include <thread.h>

       int thr_kill(thread_t thread, int sig);

       The  thr_kill()  function sends the sig signal to the thread designated by thread. The thread argument must be a member of the same process
       as the calling thread. The sig argument must be one of the signals listed  in  signal.h(3HEAD),  with  the  exception  of  SIGCANCEL  being
       reserved and off limits to thr_kill(). If sig is 0, a validity check is done for the existence of the target thread; no signal is sent.

       Upon successful completion, thr_kill() returns 0. Otherwise,  an error number is returned. In the event of failure, no signal is sent.

       The thr_kill() function will fail if:

       EINVAL          The sig argument value is not zero and is an invalid or an  unsupported signal number.

       ESRCH           No thread was found that corresponded to the thread designated by thread ID.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |MT-Level                     |Async-Signal-Safe            |
       +-----------------------------+-----------------------------+

       kill(2), sigaction(2), raise(3C), signal.h(3HEAD), thr_self(3C), attributes(5), standards(5)

                                                                    23 Mar 2005                                                       thr_kill(3C)

TKILL(2)						     Linux Programmer's Manual							  TKILL(2)

NAME

       tkill, tgkill - send a signal to a thread

SYNOPSIS

       int tkill(int tid, int sig);

       int tgkill(int tgid, int tid, int sig);

DESCRIPTION

       tgkill()  sends	the  signal  sig to the thread with the thread ID tid in the thread group tgid.  (By contrast, 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.)

       tkill() is an obsolete predecessor to 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 tgid is specified as -1, tgkill() is equivalent to tkill().

       These are the raw system call interfaces, meant for internal thread library use.

RETURN VALUE

       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS

       EINVAL An invalid thread ID, thread group ID, or signal was specified.

       EPERM  Permission denied.  For the required permissions, see kill(2).

       ESRCH  No process with the specified thread ID (and thread group ID) exists.

VERSIONS

       tkill() is supported since Linux 2.4.19 / 2.5.4.  tgkill() was added in Linux 2.5.75.

CONFORMING TO

       tkill() and tgkill() are Linux-specific and should not be used in programs that are intended to be portable.

NOTES

       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).

SEE ALSO

       clone(2), gettid(2), kill(2)

COLOPHON

       This  page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-10-01								  TKILL(2)