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view tests/test-permissions.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 | 8fb6844a4ff1 |
children | 435f63d12475 |
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#require unix-permissions no-root $ hg init t $ cd t $ echo foo > a $ hg add a $ hg commit -m "1" $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 1 files, 1 changesets, 1 total revisions $ chmod -r .hg/store/data/a.i $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files abort: Permission denied: $TESTTMP/t/.hg/store/data/a.i [255] $ chmod +r .hg/store/data/a.i $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 1 files, 1 changesets, 1 total revisions $ chmod -w .hg/store/data/a.i $ echo barber > a $ hg commit -m "2" trouble committing a! abort: Permission denied: $TESTTMP/t/.hg/store/data/a.i [255] $ chmod -w . $ hg diff --nodates diff -r 2a18120dc1c9 a --- a/a +++ b/a @@ -1,1 +1,1 @@ -foo +barber $ chmod +w . $ chmod +w .hg/store/data/a.i $ mkdir dir $ touch dir/a $ hg status M a ? dir/a $ chmod -rx dir $ hg status dir: Permission denied M a Reenable perm to allow deletion: $ chmod +rx dir $ cd ..