From 5597d425e94ac19c13e8954f9df6e8720e70de1b Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Fri, 1 Mar 2013 10:51:13 +0100
Subject: [PATCH] pid_namespaces.7: Explain use for readlink() from /proc/self

Reported-by: Rob Landley <rob@landley.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man7/pid_namespaces.7 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/man7/pid_namespaces.7 b/man7/pid_namespaces.7
index 5ef19a926..294bad56b 100644
--- a/man7/pid_namespaces.7
+++ b/man7/pid_namespaces.7
@@ -270,6 +270,8 @@ on the path
 .I /proc/self
 yields the process ID of the caller in the PID namespace of the procfs mount
 (i.e., the PID namespace of the process that mounted the procfs).
+This can be useful for introspection purposes,
+when a process wants to discover its PID in other namespaces.
 .\"
 .\" ============================================================
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