'\" t
.\"     Title: sys_tgkill
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: Driver Basics
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "SYS_TGKILL" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Driver Basics"
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.SH "NAME"
sys_tgkill \- send signal to one specific thread
.SH "SYNOPSIS"
.HP \w'long\ sys_tgkill('u
.BI "long sys_tgkill(pid_t\ " "tgid" ", pid_t\ " "pid" ", int\ " "sig" ");"
.SH "ARGUMENTS"
.PP
\fItgid\fR
.RS 4
the thread group ID of the thread
.RE
.PP
\fIpid\fR
.RS 4
the PID of the thread
.RE
.PP
\fIsig\fR
.RS 4
signal to be sent
.RE
.SH "DESCRIPTION"
.PP
This syscall also checks the
\fItgid\fR
and returns \-ESRCH even if the PID exists but it\*(Aqs not belonging to the target process anymore\&. This method solves the problem of threads exiting and PIDs getting reused\&.
.SH "COPYRIGHT"
.br