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TKILL(2) Linux Programmer's Manual TKILL(2)
tkill - send a signal to a single process
int tkill(int tid, int sig);
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). Since all the processes in a
thread group have the same PID, they cannot be individually signalled
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
On success, zero is returned. On error, -1 is returned, and errno is
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)
tkill() is supported since Linux 2.4.19 / 2.5.4.
tkill() is Linux specific and should not be used in programs that are
intended to be portable.
Glibc does not provide wrapper for these system calls; call them using
Linux 2.6.6 2007-06-01 TKILL(2)
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