Your message dated Wed, 03 Jun 2009 21:09:59 -0400
with message-id <[email protected]>
and subject line Re: Bug#531013: coreutils: chmod not resetting setuid/setgid
has caused the Debian Bug report #531013,
regarding coreutils: chmod not resetting setuid/setgid
to be marked as done.
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--- Begin Message ---
Package: coreutils
Version: 7.3-1
using chmod (0)0775 isn't clearing setuid/setgid. I'm sure it used
to, same on lenny and unstable boxes.
$ mkdir foo; ls -l
drwxr-xr-x 2 root root 4096 2009-05-29 09:14 foo
$ chmod 2775 foo; ls -l
drwxrwsr-x 2 root root 4096 2009-05-29 09:14 foo
$ chmod 0775 foo; ls -l
drwxrwsr-x 2 root root 4096 2009-05-29 09:14 foo
$ chmod 00775 foo; ls -l
drwxrwsr-x 2 root root 4096 2009-05-29 09:14 foo
$ strace chmod 0775 foo; ls -l
....
fchmodat(AT_FDCWD, "foo", 02775) = 0
....
drwxrwsr-x 2 root root 4096 2009-05-29 09:14 foo
Adrian
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--- End Message ---
--- Begin Message ---
On Fri, May 29, 2009 at 09:25:04AM +0100, Adrian Bridgett wrote:
using chmod (0)0775 isn't clearing setuid/setgid. I'm sure it used
to,
From NEWS file, version 6.0:
chmod, install, and mkdir now preserve a directory's set-user-ID and
set-group-ID bits unless you explicitly request otherwise. E.g.,
`chmod 755 DIR' and `chmod u=rwx,go=rx DIR' now preserve DIR's
set-user-ID and set-group-ID bits instead of clearing them, and
similarly for `mkdir -m 755 DIR' and `mkdir -m u=rwx,go=rx DIR'. To
clear the bits, mention them explicitly in a symbolic mode, e.g.,
`mkdir -m u=rwx,go=rx,-s DIR'. To set them, mention them explicitly
in either a symbolic or a numeric mode, e.g., `mkdir -m 2755 DIR',
`mkdir -m u=rwx,go=rx,g+s' DIR. This change is for convenience on
systems where these bits inherit from parents. Unfortunately other
operating systems are not consistent here, and portable scripts
cannot assume the bits are set, cleared, or preserved, even when the
bits are explicitly mentioned. For example, OpenBSD 3.9 `mkdir -m
777 D' preserves D's setgid bit but `chmod 777 D' clears it.
Conversely, Solaris 10 `mkdir -m 777 D', `mkdir -m g-s D', and
`chmod 0777 D' all preserve D's setgid bit, and you must use
something like `chmod g-s D' to clear it.
Mike Stone
--- End Message ---
