From: "ko1 (Koichi Sasada)" <redmine@...>
Date: 2013-02-20T09:03:25+09:00
Subject: [ruby-core:52543] [ruby-trunk - Bug #7886][Feedback] Not recognizing unix group permissions for Mac OS X (Mountain Lion) Active Directory (AD) mobile accounts


Issue #7886 has been updated by ko1 (Koichi Sasada).

Category set to core
Status changed from Open to Feedback
Assignee set to nobu (Nobuyoshi Nakada)
Target version set to next minor

afazio,
Could you try in C using access(2)?

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Bug #7886: Not recognizing unix group permissions for Mac OS X (Mountain Lion) Active Directory (AD) mobile accounts
https://bugs.ruby-lang.org/issues/7886#change-36631

Author: afazio (Alfred Fazio)
Status: Feedback
Priority: High
Assignee: nobu (Nobuyoshi Nakada)
Category: core
Target version: next minor
ruby -v: ruby 1.9.3p374 (2013-01-15 revision 38858) [x86_64-darwin12.2.1]


The following bug occurs in 1.9.3 p374 and also in 1.8.7 p371

When using a Active Directory mobile account in Mac OS X (only tested thus far with Mountain Lion), Ruby does not honor Unix group membership when testing file permissions.

Let me give an example:

% whoami
afazio

# I am in the "rvm" group:

% groups
<snip> rvm <snip>

# Let's create a simple file:
% touch test-file
% sudo chown root:rvm test-file
% sudo chmod 660 test-file

% ls -l test-file
-rw-rw----  1 root  rvm  4 Feb 19 11:43 test-file

# At this moment only root and members of "rvm" group can modify test-file
# OS recognizes I have correct permissions:
% echo "test data" >> test-file
% cat test-file
test data

# However, Ruby does not:
% irb
1.9.3-p374 :001 > File.exists?("test-file")
 => true
1.9.3-p374 :002 > File.writable?("test-file")
 => false

# To further illustrate, I **can** write to this file in Ruby:

pry(main)> File.open("test-file", "w") do |f|
pry(main)*   f.write("wee")  
pry(main)* end  
3
pry(main)> quit

% cat test-file
wee



-- 
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