Mercurial > hg
view tests/test-revlog.t @ 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 | d9179856d732 |
children | 151cc3b3d799 |
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Test for CVE-2016-3630 $ hg init >>> open("a.i", "w").write( ... """eJxjYGZgZIAAYQYGxhgom+k/FMx8YKx9ZUaKSOyqo4cnuKb8mbqHV5cBCVTMWb1Cwqkhe4Gsg9AD ... Joa3dYtcYYYBAQ8Qr4OqZAYRICPTSr5WKd/42rV36d+8/VmrNpv7NP1jQAXrQE4BqQUARngwVA==""" ... .decode("base64").decode("zlib")) $ hg debugindex a.i rev offset length delta linkrev nodeid p1 p2 0 0 19 -1 2 99e0332bd498 000000000000 000000000000 1 19 12 0 3 6674f57a23d8 99e0332bd498 000000000000 $ hg debugdata a.i 1 2>&1 | egrep 'Error:.*decoded' (mercurial.mpatch.)?mpatchError: patch cannot be decoded (re)