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copied!<p>It turns out that when you specify the <code>core.sharedrepository</code> config, git does <code>chmod()</code>s on the files it creates. That way, the result is correct despite filesystem types and mount options, <em>except</em> in your one case where the repository owner isn't a member of the group it's shared with.</p> <p>That bad result happens because git's <code>chmod()</code> appears to succeed -- you can see it in an strace -- but ignores anything the issuing user isn't authorized to ask for.</p> <p>So to avoid that weirdity, the thing to do is</p> <pre><code>git config --unset core.sharedrepository </code></pre> <p>(or not specify --shared at all on the init) so git doesn't touch the filesystem's default permissions at all. Amusingly enough that makes everything work:</p> <pre><code>~/sandbox/75276/s$ find ../s.git -ls 12193569 4 drwxrws--- 4 jthill mail 4096 Apr 9 13:52 ../s.git 12193571 4 -rw-rw---- 1 jthill mail 73 Apr 8 20:40 ../s.git/description 12193572 4 -rw-rw---- 1 jthill mail 23 Apr 8 20:40 ../s.git/HEAD 12721086 4 drwxrws--- 2 jthill mail 4096 Apr 9 13:52 ../s.git/objects 12193570 4 drwxrws--- 2 jthill mail 4096 Apr 9 13:52 ../s.git/refs 12193578 4 -rw-rw---- 1 jthill mail 104 Apr 9 13:37 ../s.git/config ~/sandbox/75276/s$ cat ../s.git/config [core] repositoryformatversion = 0 filemode = true bare = true [receive] denyNonFastforwards = true ~/sandbox/75276/s$ git push origin master Counting objects: 3, done. Writing objects: 100% (3/3), 198 bytes, done. Total 3 (delta 0), reused 0 (delta 0) To /home/jthill/sandbox/75276/s.git * [new branch] master -> master ~/sandbox/75276/s$ find ../s.git -ls 12193569 4 drwxrws--- 4 jthill mail 4096 Apr 9 13:52 ../s.git 12193571 4 -rw-rw---- 1 jthill mail 73 Apr 8 20:40 ../s.git/description 12193572 4 -rw-rw---- 1 jthill mail 23 Apr 8 20:40 ../s.git/HEAD 12721086 4 drwxrws--- 5 jthill mail 4096 Apr 9 13:53 ../s.git/objects 16777964 4 drwxrwsr-x 2 jthill mail 4096 Apr 9 13:53 ../s.git/objects/58 16777965 4 -r--r--r-- 1 jthill mail 17 Apr 9 13:53 ../s.git/objects/58/7be6b4c3f93f93c489c0111bba5596147a26cb 16777962 4 drwxrwsr-x 2 jthill mail 4096 Apr 9 13:53 ../s.git/objects/ab 16777963 4 -r--r--r-- 1 jthill mail 46 Apr 9 13:53 ../s.git/objects/ab/69b4abf3bb84d4e268bd42d84e4a9a5e242bd3 16777960 4 drwxrwsr-x 2 jthill mail 4096 Apr 9 13:53 ../s.git/objects/81 16777961 4 -r--r--r-- 1 jthill mail 120 Apr 9 13:53 ../s.git/objects/81/210f2df9629e5df5f6dfa0923a2cf72369314d 12193570 4 drwxrws--- 3 jthill mail 4096 Apr 9 13:53 ../s.git/refs 12193573 4 drwxrwsr-x 2 jthill mail 4096 Apr 9 13:53 ../s.git/refs/heads 12193574 4 -rw-rw-r-- 1 jthill mail 41 Apr 9 13:53 ../s.git/refs/heads/master 12193578 4 -rw-rw---- 1 jthill mail 104 Apr 9 13:37 ../s.git/config ~/sandbox/75276/s$ </code></pre>

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