TKILL(2) Linux Programmer's Manual TKILL(2)NAMEtkill - send a signal to a single process
SYNOPSIS
#include <sys/types.h>
#include <linux/unistd.h>
#include <errno.h>
_syscall2(int, tkill, int, tid, int, sig)
/* Using syscall(2) may be preferable; see intro(2) */
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). Since all the processes in a
thread group have the same PID, they cannot be individually signalled
with kill(). 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.
CONFORMING TOtkill() is Linux specific and should not be used in programs that are
intended to be portable.
VERSIONStkill() is supported since Linux 2.4.19 / 2.5.4.
SEE ALSOgettid(2), kill(2), tgkill(2)Linux 2.6.6 2004-05-31 TKILL(2)
