I can't reproduce this actually, but it seems clear that we do apply the umask
when --preserve=mode (-a) is
passed.
Curiously files get chmod()ed twice:
root@jak-t14-g3:~# rm -rf b && strace -e chmod coreutils cp -a a b && ls -lh a b
chmod("b/file", 0100700) = 0
chmod("b/file", 0100775) = 0
chmod("b/directory", 040775) = 0
chmod("b/", 040755) = 0
+++ exited with 0 +++
a:
total 0
drwxrwxr-x 1 root root 0 Jul 29 13:15 directory
-rwxrwxr-x 1 root root 0 Jul 29 13:11 file
b:
total 0
drwxrwxr-x 1 root root 0 Jul 29 13:15 directory
-rwxrwxr-x 1 root root 0 Jul 29 13:11 file
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https://bugs.launchpad.net/bugs/2118905
Title:
cp -a doesn't preserve subdirectories permissions
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