On 6/8/22 20:31, mg wrote:
# Note: There is a typo in the online HTML manual; missing f after -c
Thanks for reporting that. I fixed it by installing the attached patch.
mkdir t &&
cd t &&
echo foo > bar &&
sudo chattr +i bar &&
echo Can make bar immutable &&
lsattr &&
# sudo tar cf j.tar --xattrs --xattrs-include=user.* bar &&
sudo tar --xattrs -cf j.tar bar &&
mkdir t1 &&
cd t1 &&
echo "Cannot restore. Try 4 ways." &&
sudo tar xf ../j.tar --xattrs --xattrs-include=user.* &&
lsattr &&
sudo tar xf ../j.tar --xattrs-include=user.* &&
lsattr &&
sudo tar xf ../j.tar --xattrs &&
lsattr &&
sudo tar xf ../j.tar &&
lsattr
I don't have easy access to a file system that supports attributes, so
the above is a bit cryptic to me. Perhaps you can help by running this
command:
sudo env LC_ALL=C strace -o /tmp/tar.trace tar xf ../j.tar --xattrs
and seeing which system calls fail in the trace. If it's not too large,
please gzip -9 /tmp/tar.trace and email it as an attachment.
As a general comment, I will note that if I do backup (-c) and restore (-x), I
would expect there would be no differences. Why wouldn't you make that strategy
the default?
There is an argument for the current default: when you unpack a random
tarball from someone you don't know, you don't get files with weird
attributes. At this point it might be a bit late to change the default
as people are most likely depending on it.From 4eb9d052b21eea93d9030f1d34416af68a1f14f0 Mon Sep 17 00:00:00 2001
From: Paul Eggert <[email protected]>
Date: Sun, 12 Jun 2022 20:33:09 -0700
Subject: [PATCH] Fix doc -c typo
https://lists.gnu.org/r/bug-tar/2022-06/msg00006.html
* doc/tar.texi (Extended File Attributes): Fix typo.
---
doc/tar.texi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/doc/tar.texi b/doc/tar.texi
index 95de6328..dd565448 100644
--- a/doc/tar.texi
+++ b/doc/tar.texi
@@ -5667,7 +5667,7 @@ Here, the @var{pattern} is a globbing pattern. For example, the
following command:
@example
-$ @kbd{tar --xattrs --xattrs-exclude='user.*' -c a.tar .}
+$ @kbd{tar --xattrs --xattrs-exclude='user.*' -cf a.tar .}
@end example
will include in the archive @file{a.tar} all attributes, except those
--
2.34.1
