Name
SYSCALL_DEFINE3 —
send signal to one specific thread
Synopsis
SYSCALL_DEFINE3 (
tgkill, pid_t, tgid, pid_t, pid, int, sig)
;
Arguments
tgkill
pid_t
tgid
the thread group ID of the thread
pid_t
pid
the PID of the thread
int
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.