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view tests/test-convert-cvsnt-mergepoints.rlog @ 31209:dd2364f5180a
localrepo: handle rename with hardlinks properly
In "aftertrans", we rename "journal.*" to "undo.*". We expect "journal.*"
files to disappear after renaming.
However, if "journal.foo" and "undo.foo" refer to a same file (hardlink),
rename may be a no-op, leaving both files on disk, according to Linux
manpage [1]:
If oldpath and newpath are existing hard links referring to the same
file, then rename() does nothing, and returns a suc‐ cess status.
The POSIX specification [2] is not very clear about what to do.
To be safe, remove "undo.*" before the rename so "journal.*" cannot be left
on disk.
[1]: http://man7.org/linux/man-pages/man2/rename.2.html
[2]: http://pubs.opengroup.org/onlinepubs/9699919799/
author | Jun Wu <quark@fb.com> |
---|---|
date | Thu, 02 Mar 2017 21:49:30 -0800 |
parents | 727f7aaefaab |
children |
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head: 1.2 branch: locks: strict access list: symbolic names: MYBRANCH1_2: 1.1.2.2.0.2 MYBRANCH1_1: 1.1.0.4 MYBRANCH1: 1.1.0.2 keyword substitution: kv total revisions: 8; selected revisions: 8 description: ---------------------------- revision 1.2 date: 2009/04/02 07:00:32; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: 14d449d462903487; mergepoint: 1.1.2.2.2.1; filename: foo.txt; merge ---------------------------- revision 1.1 date: 2009/04/02 06:50:43; author: user; state: Exp; kopt: kv; commitid: 17ac49d460432d04; filename: foo.txt; branches: 1.1.2; 1.1.4; foo.txt ---------------------------- revision 1.1.4.2 date: 2009/04/02 07:02:51; author: user; state: Exp; lines: +1 -0; kopt: kv; commitid: 170049d4631b364d; mergepoint: 1.1.2.2; filename: foo.txt; merge ---------------------------- revision 1.1.4.1 date: 2009/04/02 06:53:42; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: dc849d460f52f49; filename: foo.txt; quux ---------------------------- revision 1.1.2.2 date: 2009/04/02 06:53:20; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: 8ec49d460e02f04; filename: foo.txt; branches: 1.1.2.2.2; baz ---------------------------- revision 1.1.2.1 date: 2009/04/02 06:52:38; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: d5049d460b62e7b; filename: foo.txt; bar ---------------------------- revision 1.1.2.2.2.1 date: 2009/04/02 06:55:42; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: 11c849d4616d30d1; filename: foo.txt; bazzie =============================================================================