In what way is /cygdrive special WRT to permissions?
Andy Hall
fixpertise-consulting@comcast.net
Wed Oct 6 20:20:00 GMT 2010
Corinna -
Thanks for the reply and clarification. I have made the obvious change in
my mounts to get around this problem. However, there has been a change in
behavior between 1.5 and 1.7. I have 1.7.7 installed on Windows Server
2003 SP2.
The mount table shows
$ mount
//vega/repository on /repos type smbfs (binary,noacl)
C:/cygwin/bin on /usr/bin type ntfs (binary,auto)
C:/cygwin/lib on /usr/lib type ntfs (binary,auto)
C:/cygwin on / type ntfs (binary,auto)
C: on /cygdrive/c type ntfs (binary,posix=0,user,noumount,auto)
D: on /cygdrive/d type iso9660 (binary,posix=0,user,noumount,auto)
F: on /cygdrive/f type smbfs (binary,posix=0,user,noumount,auto)
H: on /cygdrive/h type smbfs (binary,posix=0,user,noumount,auto)
F: also happens to be mapped to //vega/repository via the normal Windows
mechanisms.
When signed on to the Administrator account you have:
Administrator@taurus ~
$ ls -l /repos
total 2048
drwxr-xr-x 36 Administrator None 0 2010-10-04 19:30 builds
drwxr-xr-x 17 Administrator None 0 2010-10-04 18:23 releases
Administrator@taurus ~
$ test -w /repos/builds && echo writeable
writeable
Administrator@taurus ~
$ ls -l /cygdrive/f
total 2048
drwxrwxr-x 36 ???????? ???????? 0 2010-10-04 19:30 builds
drwxrwxr-x 17 ???????? ???????? 0 2010-10-04 18:23 releases
Administrator@taurus ~
$ test -w /repos/builds && echo writeable
Writeable
When logged on as the non-admistrative user build you have:
build@taurus ~
$ ls -l /repos
total 2048
drwxr-xr-x 36 build None 0 2010-10-04 19:30 builds
drwxr-xr-x 17 build None 0 2010-10-04 18:23 releases
build@taurus ~
$ test -w /repos/builds && echo writeable
writeable
build@taurus ~
$ ls -l /cygdrive/f
total 2048
drwxrwxr-x 36 ???????? ???????? 0 2010-10-04 19:30 builds
drwxrwxr-x 17 ???????? ???????? 0 2010-10-04 18:23 releases
build@taurus ~
$ test -w /cygdrive/f/builds && echo writeable
build@taurus ~
$ echo test >/cygdrive/f/builds/zap
build@taurus ~
$ ls -l /cygdrive/f/builds/zap
-rwxrwxr-x 1 ???????? ???????? 5 2010-10-06 16:11 /cygdrive/f/builds/zap
Notice that the test -w /cygdrive/f/builds reports that /cygdrive/f/builds
is not writeable, yet you can create and write files in /cygdrive/f/builds!
THIS IS INCONSTENT BEHAVIOR. Cygwin 1.5 did not have this behavior.
Regarding the mount of drive letters via /etc/fstab. I am not sure what the
documentation should say about this. Overriding the default mount of a
single drive letter in fstab actually seems to work, although it simply
reproduces the same behavior as the default.
Even if I understood the actual behavior, I regret that am not familiar with
the ways of Cygwin source maintenance to make the documentation changes. I
have to leave this to somebody else more qualified.
Cheers, Andy
> On Oct 6 1:48 Corinna Vischen wrote:
>
>
> On Oct 5 15:40, Andy Hall wrote:
> > If instead, I map F: to /cygdrive/c with the following entry in
> /etc/fstab
> >
> > F: /cygdrive/f smbfs binary,noacl 0 0
> >
> > mount shows
> >
> > $ mount
> > C:/cygwin/bin on /usr/bin type ntfs (binary,auto)
> > C:/cygwin/lib on /usr/lib type ntfs (binary,auto)
> > C:/cygwin on / type ntfs (binary,auto)
> > F: on /cygdrive/f type smbfs (binary,noacl)
> > C: on /cygdrive/c type ntfs (binary,posix=0,user,noumount,auto)
> >
> > And ls -l of /cygdrive/f shows
> >
> > $ ls -l /cygdrive/f
> > total 2048
> > drwxrwxr-x 36 ???????? ???????? 0 2010-10-04 16:30 builds
> > drwxrwxr-x 17 ???????? ???????? 0 2010-10-04 15:23 releases
> > [...]
> > Why am I getting -1 for the uid and gid when I mount to /cygdrive/f but
> not
> > to /repos1?
>
> That's a restriction of the cygdrive prefix handling. You can't
> override the cygdrive mount options for a single drive. It's an
> all or nothing thingy. I guess it would help to refuse such paths
> in /etc/fstab or mount(1), or at least improve the documentation,
> but, well, http://cygwin.com/acronyms/#SHTDI.
>
>
> Corinna
>
> --
> Corinna Vinschen Please, send mails regarding Cygwin to
> Cygwin Project Co-Leader cygwin AT cygwin DOT com
> Red Hat
>
> --
> Problem reports: http://cygwin.com/problems.html
> FAQ: http://cygwin.com/faq/
> Documentation: http://cygwin.com/docs.html
> Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
More information about the Cygwin
mailing list