From: "F. Senault" <fred@...>
Date: 2010-11-18T20:56:38+09:00
Subject: Stange behaviour with files permissions on a windows mounted share

Hi.

I have a windows share mounted on a FreeBSD box, and I see the 
following :

| 12:39 fred@ardbeg:~/glenmorangie/misc/temp% uname -a
| FreeBSD ardbeg.lacave.local 8.1-STABLE FreeBSD 8.1-STABLE #1: Wed Oct 20 18:56:00 CEST 2010     root@ardbeg.lacave.net:/usr/obj/usr/src/sys/ARDBEG  amd64

| 12:39 fred@ardbeg:~/glenmorangie/misc/temp% mount
...
| //FRED@GLENMORANGIE/E$ on /data/glenmorangie/misc (smbfs)

| 12:39 fred@ardbeg:~/glenmorangie/misc/temp% touch test.txt
| 12:40 fred@ardbeg:~/glenmorangie/misc/temp% ls -la
| total 32
| drwxr-xr-x  1 fred  wheel  16384 18 nov 12:40 .
| drwxr-xr-x  1 fred  wheel  16384  1 jan  1970 ..
| -rwxr-xr-x  1 fred  wheel      0 18 nov 12:40 test.txt

| 12:40 fred@ardbeg:~/glenmorangie/misc/temp% chmod a-w test.txt
| 12:40 fred@ardbeg:~/glenmorangie/misc/temp% ls -la
| total 32
| drwxr-xr-x  1 fred  wheel  16384 18 nov 12:40 .
| drwxr-xr-x  1 fred  wheel  16384  1 jan  1970 ..
| -r-xr-xr-x  1 fred  wheel      0 18 nov 12:40 test.txt

| 12:40 fred@ardbeg:~/glenmorangie/misc/temp% echo "abc" > test.txt
| zsh: permission denied: test.txt

All set.  (And Windows shows the file as read-only too, FWIW.)

| 12:40 fred@ardbeg:~/glenmorangie/misc/temp% ruby -v
| ruby 1.9.2p0 (2010-08-18 revision 29036) [amd64-freebsd8]

| 12:40 fred@ardbeg:~/glenmorangie/misc/temp% irb
| >> File.writable? "./test.txt"
| => true

Uh ?

| >> File.stat("./test.txt").writable?
| => false

Better.

| >> File.open("./test.txt", "w") {}
| Errno::EACCES: Permission denied - ./test.txt
|         from (irb):3:in `initialize'
|         from (irb):3:in `open'
|         from (irb):3
|         from /usr/local/bin/irb:12:in `<main>'

Ok.

And, from the Windows box itself :

| E:\temp>ruby -v
| ruby 1.9.1p429 (2010-07-02 revision 28523) [i386-mingw32]

| E:\temp>irb
| irb(main):001:0> File.writable?("./test.txt")
| => false

Good.

Is this to be expected ?  Is it a bug from FreeBSD or from Ruby ?

TIA,

Fred
-- 
I never really understood how there could be things that would drive you
insane just because you knew them until I ran into Windows.
                                             (Peter da Silva in the SDM)