syscall_define3(9)
NAME
SYSCALL_DEFINE3 - send signal to one specific thread
SYNOPSIS
SYSCALL_DEFINE3(tgkill, int, tgid, int, pid, int, sig);
ARGUMENTS
- tgkill
- -- undescribed -
- int
- -- undescribed -
- tgid
- the thread group ID of the thread
- int
- -- undescribed -
- pid
- the PID of the thread
- int
- -- undescribed -
- sig
- signal to be sent
DESCRIPTION
This syscall also checks the tgid and returns -ESRCH even if the PID
exists but itīs not belonging to the target process anymore. This
method solves the problem of threads exiting and PIDs getting reused.