Hi, Hm.. I am puzzled then. I clearly see that "mount --fake" works on ubuntu precise with linux-util package version 2.20.1. I checked ubuntu-specific changes http://packages.ubuntu.com/precise/util-linux and I do not see anything related to the flags handling. But your change be9adec40ffc8 is merged to project in v2.17.... The only diff between 2.20 vs 2.22 is expression for "restricted": v2.20 /* if we're really root and aren't running setuid */ if (((uid_t)0 == ruid) && (ruid == euid)) { restricted = 0; } v2.22 cxt->restricted = (uid_t) 0 == ruid && ruid == euid ? 0 : 1; My first though was that something wrong with operators precedence in v2.22, but no - expressions evaluated the same way as in v2.20 I keep trying to understand the behavior change between Ubuntu (v2.20.1) and Arch (v2.22) On Sun, Feb 3, 2013 at 7:28 AM, Karel Zak <kzak@xxxxxxxxxx> wrote: > On Sun, Feb 03, 2013 at 01:39:50AM -0800, Anatol Pomozov wrote: >> I am trying to compile and use libfuse. Libfuse utilises 'mount' and >> 'umount' tools. One of few things it uses are "--fake" and >> "--no-canonicalize" command options run as regular user. It worked >> fine with previous versions of util-linux (2.20 from Ubuntu Precise). >> But in the latest version (2.22 from Arch) it fails to run as a >> regular user: > > The original (now deprecated) mount code: > > # git blame --date=short -L 2572,+11 mount-deprecated/mount.c > > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2572) if (restricted && > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2573) (types || options || readwrite || nomtab || mount_all || > be9adec4 mount/mount.c (Karel Zak 2009-12-17 2574) nocanonicalize || fake || mounttype || > be9adec4 mount/mount.c (Karel Zak 2009-12-17 2575) (argc + specseen) != 1)) { > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2576) > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2577) if (ruid == 0 && euid != 0) > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2578) /* user is root, but setuid to non-root */ > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2579) die (EX_USAGE, _("mount: only root can do that " > b7481d6f mount/mount.c (Karel Zak 2010-06-14 2580) "(effective UID is %u)"), euid); > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2581) > 3d1b35b6 mount/mount.c (Karel Zak 2009-09-30 2582) die (EX_USAGE, _("mount: only root can do that")); > > for example: > > commit be9adec40ffc81b28cbb051d0aa1f46f596f7b81 > Author: Karel Zak <kzak@xxxxxxxxxx> > Date: Thu Dec 17 12:27:16 2009 +0100 > > mount: disable --no-canonicalize for non-root users > > Signed-off-by: Karel Zak <kzak@xxxxxxxxxx> > > >> $ mount --version >> mount from util-linux 2.22.2 (libmount 2.22.0: debug) >> $ mount --fake >> mount: only root can use "--fake" option > > fake was always disable for non root users > >> $ mount --no-canonicalize >> mount: only root can use "--no-canonicalize" option >> >> Should it be removed from the list of "restricted" options like it >> happened with other options recently? This would restore the same >> behavior that "mount" had before. > > I don't see a change... > > Karel > > -- > Karel Zak <kzak@xxxxxxxxxx> > http://karelzak.blogspot.com -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
