linux-kernel - [PATCH 1/2] proc.5: Document /proc/[pid]/setgroups

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Date:	Fri, 12 Dec 2014 15:54:01 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Michael Kerrisk-manpages <mtk.manpages@...il.com>
Cc:	Linux Containers <containers@...ts.linux-foundation.org>,
	Josh Triplett <josh@...htriplett.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	Linux API <linux-api@...r.kernel.org>,
	linux-man <linux-man@...r.kernel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	LSM <linux-security-module@...r.kernel.org>,
	Casey Schaufler <casey@...aufler-ca.com>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Richard Weinberger <richard@....at>,
	Kenton Varda <kenton@...dstorm.io>,
	stable <stable@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>
Subject: [PATCH 1/2] proc.5: Document /proc/[pid]/setgroups


Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
---
 man5/proc.5 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/man5/proc.5 b/man5/proc.5
index 96077d0dd195..d661e8cfeac9 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -1097,6 +1097,21 @@ are not available if the main thread has already terminated
 .\"       Added in 2.6.9
 .\"       CONFIG_SCHEDSTATS
 .TP
+.IR /proc/[pid]/setgroups " (since Linux 3.19-rc1)"
+This file reports
+.BR allow
+if the setgroups system call is allowed in the current user namespace.
+This file reports
+.BR deny
+if the setgroups system call is not allowed in the current user namespace.
+This file may be written to with values of
+.BR allow
+and
+.BR deny
+before
+.IR /proc/[pid]/gid_map
+is written to (enabling setgroups) in a user namespace.
+.TP
 .IR /proc/[pid]/smaps " (since Linux 2.6.14)"
 This file shows memory consumption for each of the process's mappings.
 (The
-- 
1.9.1

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