SYS_TGKILL(9) Driver Basics SYS_TGKILL(9)NAMEsys_tgkill - send signal to one specific thread
SYNOPSIS
long sys_tgkill(pid_t tgid, pid_t pid, int sig);
ARGUMENTS
tgid
the thread group ID of the thread
pid
the PID of the thread
sig
signal to be sent
DESCRIPTION
This syscall also checks the tgid and returns -ESRCH even if the PID
exists but it´s not belonging to the target process anymore. This
method solves the problem of threads exiting and PIDs getting reused.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 SYS_TGKILL(9)