From d96a43d419f00e9e4cb1556e79ae86e126ce9dbf Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx.manpages@gmail.com>
Date: Sat, 12 Jun 2021 10:31:35 +0200
Subject: [PATCH] tkill.2: Use syscall(SYS_...); for system calls without a
 wrapper; fix includes too

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/tkill.2 | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/man2/tkill.2 b/man2/tkill.2
index a6752591b..6ff930e17 100644
--- a/man2/tkill.2
+++ b/man2/tkill.2
@@ -31,14 +31,22 @@
 tkill, tgkill \- send a signal to a thread
 .SH SYNOPSIS
 .nf
-.BI "int tkill(pid_t " tid ", int " sig );
-.BI "int tgkill(pid_t " tgid ", pid_t " tid ", int " sig );
+.BR "#include <signal.h>" "           /* Definition of " SIG* " constants */"
+.BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
+.B #include <unistd.h>
+.PP
+.BI "int syscall(SYS_tkill, pid_t " tid ", int " sig );
+.PP
+.B #include <signal.h>
+.PP
+.BI "int tgkill, pid_t " tgid ", pid_t " tid ", int " sig );
 .fi
 .PP
 .IR Note :
-There is no glibc wrapper for
-.BR tkill ();
-see NOTES.
+glibc provides no wrapper for
+.BR tkill (),
+necessitating the use of
+.BR syscall (2).
 .SH DESCRIPTION
 .BR tgkill ()
 sends the signal
@@ -138,10 +146,6 @@ in
 .BR clone (2)
 for an explanation of thread groups.
 .PP
-Glibc does not provide a wrapper for
-.BR tkill ();
-call it using
-.BR syscall (2).
 Before glibc 2.30, there was also no wrapper function for
 .BR tgkill ().
 .SH SEE ALSO