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tkill (2)
TKILL(2) Linux Programmer's Manual TKILL(2)
NAME
tkill - send a signal to a single process
SYNOPSIS
int tkill(int tid, int sig);
DESCRIPTION
The tkill() system call is analogous to kill(2), except when the speci-
fied process is part of a thread group (created by specifying the
CLONE_THREAD flag in the call to clone(2)). Since all the processes in
a thread group have the same PID, they cannot be individually signaled
with kill(2). With tkill(), however, one can address each process by
its unique TID.
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 TID 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.
CONFORMING TO
tkill() is Linux specific and should not be used in programs that are
intended to be portable.
NOTES
Glibc does not provide wrapper for these system calls; call them using
syscall(2).
SEE ALSO
gettid(2), kill(2)
Linux 2007-06-01 TKILL(2)
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