-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Jan Engelhardt on 5/12/2007 8:50 AM: > Cc'ed bug-coreutils. > The following bug affects at least: > coreutils 6.4 (used in opensuse 10.2 - open a bug report here) > coreutils 6.9
> > $ mkdir /dev/shm/me > $ strace -e chmod chmod 0755 me > chmod("me", 02755) = 0 Not a bug, and this is becoming a FAQ. POSIX explicitly leaves the special mode bits undefined when using octal permissions. And the NEWS for coreutils 6.0 is quite explicit: 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. - -- Don't work too hard, make some time for fun as well! Eric Blake [EMAIL PROTECTED] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGReWU84KuGfSFAYARAhgoAKDL8wVkTUL6Zi7ELaYjmEUDacHzugCgyEvA BKStpzgOAzhv9o9bZmCHJeU= =oEzs -----END PGP SIGNATURE----- _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils