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tar: don't hang with '-x --xattrs --skip-old-files'

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Resolves: rhbz#1399036
Version: 1.29-3
This commit is contained in:
Pavel Raiskup 2016-11-28 07:47:11 +01:00
parent 69df485d81
commit a63c5cbdf9
2 changed files with 217 additions and 0 deletions
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215
tar-1.29-xattrs-and-skip-old-files.patch Normal file
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@ -0,0 +1,215 @@
From 6bd6bf244fb1b6bc07eb9cd1cd0bfdfd76576219 Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <praiskup@redhat.com>
Date: Fri, 11 Nov 2016 12:30:35 +0200
Subject: [PATCH] don't set xattrs when --skip-old-files is used
* src/extract.c (set_xattr): Properly handle maybe_recoverable()
output. Throw warnings to not complicate caller.
(extract_file): Don't handle set_xattr's error.
* tests/xattr07.at: New testcase.
* tests/Makefile.am: Mention new testcase.
* tests/testsuite.at: Likewise.
* THANKS: Dawid.
Upstream commits 597b0ae509 and ca9399d4e.
---
THANKS | 1 +
src/extract.c | 41 +++++++++++++++++++-----------
tests/Makefile.am | 1 +
tests/testsuite.at | 1 +
tests/xattr07.at | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 102 insertions(+), 15 deletions(-)
create mode 100644 tests/xattr07.at
diff --git a/THANKS b/THANKS
index 3dda4cc..559f240 100644
--- a/THANKS
+++ b/THANKS
@@ -138,6 +138,7 @@ David Nugent davidn@blaze.net.au
David Shaw david.shaw@alcatel.com.au
David Steiner dsteiner@ispa.uni-osnabrueck.de
David Taylor taylor@think.com
+Dawid dpc@dpc.pw
Dean Gaudet dgaudet@watdragon.uwaterloo.ca
Demizu Noritoshi nori-d@is.aist-nara.ac.jp
Denis Excoffier denis.excoffier@free.fr
diff --git a/src/extract.c b/src/extract.c
index f982433..67885d7 100644
--- a/src/extract.c
+++ b/src/extract.c
@@ -795,13 +795,13 @@ maybe_recoverable (char *file_name, bool regular, bool *interdir_made)
in advance dramatically improves the following performance of reading and
writing a file). If not restoring permissions, invert the INVERT_PERMISSIONS
bits from the file's current permissions. TYPEFLAG specifies the type of the
- file. FILE_CREATED indicates set_xattr has created the file */
+ file. Returns non-zero when error occurs (while un-available xattrs is not
+ an error, rather no-op). Non-zero FILE_CREATED indicates set_xattr has
+ created the file. */
static int
set_xattr (char const *file_name, struct tar_stat_info const *st,
mode_t invert_permissions, char typeflag, int *file_created)
{
- int status = 0;
-
#ifdef HAVE_XATTRS
bool interdir_made = false;
@@ -809,17 +809,32 @@ set_xattr (char const *file_name, struct tar_stat_info const *st,
{
mode_t mode = current_stat_info.stat.st_mode & MODE_RWX & ~ current_umask;
- do
- status = mknodat (chdir_fd, file_name, mode ^ invert_permissions, 0);
- while (status && maybe_recoverable ((char *)file_name, false,
- &interdir_made));
+ for (;;)
+ {
+ if (!mknodat (chdir_fd, file_name, mode ^ invert_permissions, 0))
+ {
+ /* Successfully created file */
+ xattrs_xattrs_set (st, file_name, typeflag, 0);
+ *file_created = 1;
+ return 0;
+ }
- xattrs_xattrs_set (st, file_name, typeflag, 0);
- *file_created = 1;
+ switch (maybe_recoverable ((char *)file_name, false, &interdir_made))
+ {
+ case RECOVER_OK:
+ continue;
+ case RECOVER_NO:
+ skip_member ();
+ open_error (file_name);
+ return 1;
+ case RECOVER_SKIP:
+ return 0;
+ }
+ }
}
#endif
- return(status);
+ return 0;
}
/* Fix the statuses of all directories whose statuses need fixing, and
@@ -1136,11 +1151,7 @@ extract_file (char *file_name, int typeflag)
int file_created = 0;
if (set_xattr (file_name, &current_stat_info, invert_permissions,
typeflag, &file_created))
- {
- skip_member ();
- open_error (file_name);
- return 1;
- }
+ return 1;
while ((fd = open_output_file (file_name, typeflag, mode,
file_created, &current_mode,
diff --git a/tests/Makefile.am b/tests/Makefile.am
index abc17a4..4f3b918 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -243,6 +243,7 @@ TESTSUITE_AT = \
xattr04.at\
xattr05.at\
xattr06.at\
+ xattr07.at\
acls01.at\
acls02.at\
acls03.at\
diff --git a/tests/testsuite.at b/tests/testsuite.at
index db83c80..9493641 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -440,6 +440,7 @@ m4_include([xattr03.at])
m4_include([xattr04.at])
m4_include([xattr05.at])
m4_include([xattr06.at])
+m4_include([xattr07.at])
m4_include([acls01.at])
m4_include([acls02.at])
diff --git a/tests/xattr07.at b/tests/xattr07.at
new file mode 100644
index 0000000..a834981
--- /dev/null
+++ b/tests/xattr07.at
@@ -0,0 +1,73 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+#
+# Test suite for GNU tar.
+# Copyright 2011, 2013-2014, 2016 Free Software Foundation, Inc.
+
+# This file is part of GNU tar.
+
+# GNU tar is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU tar is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# Test description:
+# Test that --keep-old-files doesn't change xattrs of already existing file.
+# Per report:
+# https://lists.gnu.org/archive/html/bug-tar/2016-10/msg00001.html
+
+AT_SETUP([xattrs: xattrs and --skip-old-files])
+AT_KEYWORDS([xattrs xattr07])
+
+AT_TAR_CHECK([
+AT_XATTRS_PREREQ
+mkdir dir
+genfile --file dir/file
+genfile --file dir/file2
+
+setfattr -n user.test -v OurDirValue dir
+setfattr -n user.test -v OurFileValue dir/file
+setfattr -n user.test -v OurFileValue dir/file2
+
+tar --xattrs -cf archive.tar dir
+
+setfattr -n user.test -v OurDirValue2 dir
+setfattr -n user.test -v OurFileValue2 dir/file
+setfattr -n user.test -v OurFileValue2 dir/file2
+
+# Check that tar continues to file2 too!
+tar --xattrs -xvf archive.tar --skip-old-files
+tar --xattrs -xvf archive.tar --keep-old-files
+
+getfattr -h -d dir | grep -v -e '^#' -e ^$
+getfattr -h -d dir/file | grep -v -e '^#' -e ^$
+getfattr -h -d dir/file2 | grep -v -e '^#' -e ^$
+],
+[0],
+[dir/
+dir/file
+dir/file2
+dir/
+dir/file
+dir/file2
+user.test="OurDirValue2"
+user.test="OurFileValue2"
+user.test="OurFileValue2"
+], [tar: dir: skipping existing file
+tar: dir/file: skipping existing file
+tar: dir/file: skipping existing file
+tar: dir/file2: skipping existing file
+tar: dir/file2: skipping existing file
+tar: dir/file: Cannot open: File exists
+tar: dir/file2: Cannot open: File exists
+tar: Exiting with failure status due to previous errors
+])
+
+AT_CLEANUP
--
2.9.3

2
tar.spec
View File

@ -23,6 +23,7 @@ Patch5: tar-1.28-update-with-change-directory.patch
Patch9: tar-1.28-document-exclude-mistakes.patch
Patch11: tar-1.28-sparse-inf-loops.patch
Patch12: tar-1.29-create-and-xattrs-exclude.patch
Patch13: tar-1.29-xattrs-and-skip-old-files.patch
# run "make check" by default
%bcond_without check
@ -125,6 +126,7 @@ fi
* Mon Nov 28 2016 Pavel Raiskup <praiskup@redhat.com> - 1.29-3
- revert back some docs
- fix --create to use --xattrs-include/exclude (rhbz#1341787)
- don't hang with '-x --skip-old-files --xattrs' (rhbz#1399036)
* Mon Nov 7 2016 Peter Robinson <pbrobinson@fedoraproject.org> 1.29-2
- Drop large docs, minor specs cleanups