From: Niraj Kumar <niraj17@gmail.com>
To: util-linux-ng@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: hch@lst.de, nick.couchman@seakr.com
Subject: [PATCH] unrestricted_chown : userspace part
Date: Tue, 9 Dec 2008 10:02:52 +0530 [thread overview]
Message-ID: <20081209043252.GB31729@niraj-laptop> (raw)
Unrestricted chown: Userspace patch for mount program
This patch adds "unrestricted_chown" option to
mount program. This option is used to disable
the Posix _POSIX_CHOWN_RESTRICTED chown option on a given
filesystem which forbids non-privilegued users to give away files.
This is currently implemented by XFS as a sysctl, but making it per
filesystem and available not just for XFS makes more sense. This has
also been requested in http://oss.sgi.com/bugzilla/show_bug.cgi?id=768.
See http://www.opengroup.org/onlinepubs/009695399/functions/chown.html
for details.
Another patch for kernel changes is also being posted.
Signed-off-by: Niraj Kumar <niraj17@gmail.com>
diff -Naurp util-linux-ng-2.14.1.orig/mount/mount.c util-linux-ng-2.14.1/mount/mount.c
--- util-linux-ng-2.14.1.orig/mount/mount.c 2008-09-10 14:32:43.000000000 +0530
+++ util-linux-ng-2.14.1/mount/mount.c 2008-12-09 09:37:19.000000000 +0530
@@ -132,6 +132,7 @@ static const struct opt_map opt_map[] =
{ "sync", 0, 0, MS_SYNCHRONOUS}, /* synchronous I/O */
{ "async", 0, 1, MS_SYNCHRONOUS}, /* asynchronous I/O */
{ "dirsync", 0, 0, MS_DIRSYNC}, /* synchronous directory modifications */
+ { "unrestricted_chown", 0, 0, MS_UNRESTRICTED_CHOWN},/* Unrestricted Chown */
{ "remount", 0, 0, MS_REMOUNT}, /* Alter flags of mounted FS */
{ "bind", 0, 0, MS_BIND }, /* Remount part of tree elsewhere */
{ "rbind", 0, 0, MS_BIND|MS_REC }, /* Idem, plus mounted subtrees */
diff -Naurp util-linux-ng-2.14.1.orig/mount/mount_constants.h util-linux-ng-2.14.1/mount/mount_constants.h
--- util-linux-ng-2.14.1.orig/mount/mount_constants.h 2008-05-29 04:31:02.000000000 +0530
+++ util-linux-ng-2.14.1/mount/mount_constants.h 2008-12-09 09:37:19.000000000 +0530
@@ -22,6 +22,9 @@
#ifndef MS_DIRSYNC
#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
#endif
+#ifndef MS_UNRESTRICTED_CHOWN
+#define MS_UNRESTRICTED_CHOWN 256 /* Unrestricted chown */
+#endif
#ifndef MS_NOATIME
#define MS_NOATIME 0x400 /* 1024: Do not update access times. */
#endif
next reply other threads:[~2008-12-09 4:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-09 4:32 Niraj Kumar [this message]
2008-12-09 9:36 ` [PATCH] unrestricted_chown : userspace part James Youngman
[not found] ` <c5df85930812090136v7a3bdce8o7a8b70c25ab2827b-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-12-09 10:56 ` Karel Zak
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