Re-attached with testcase.
Pavel
From 4f1de1f88a1c5e0c7482be02f40c5472368da792 Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <prais...@redhat.com>
Date: Thu, 30 Jun 2016 16:17:29 +0200
Subject: [PATCH] sparse: fix pax extraction for unicode filenames
Make sure that 'GNU.sparse.name' header has higher priority than
(for sparse-purposes artificially modified) 'path' pax header.
Historically, the 'GNU.sparse.name' header comes before 'path';
this caused that modified 'path' header won and that is not what
we want in sparse "capable" tar implementation.
* src/tar.h (tar_stat_info): New argument sparse_name_done.
* src/xheader.c (raw_path_decoder): Move here the unconditional
code from path_decoder.
(path_decoder): Apply raw_path_decoder only if sparse_path_decoder
was not yet called.
(sparse_path_decoder): New wrapper around raw_path_decoder.
* tests/sparse07.at: New testcase.
* tests/testsuite.at: Mention new testcase.
* tests/Makefile.am: Likewise.
---
src/tar.h | 4 ++++
src/xheader.c | 28 +++++++++++++++++++++++-----
tests/Makefile.am | 1 +
tests/sparse07.at | 35 +++++++++++++++++++++++++++++++++++
tests/testsuite.at | 1 +
5 files changed, 64 insertions(+), 5 deletions(-)
create mode 100644 tests/sparse07.at
diff --git a/src/tar.h b/src/tar.h
index 07b5bc1..f3e2c43 100644
--- a/src/tar.h
+++ b/src/tar.h
@@ -331,6 +331,10 @@ struct tar_stat_info
int real_size_set; /* True when GNU.sparse.realsize is set in
archived file */
+ bool sparse_name_done; /* Set to true if 'GNU.sparse.name' header was
+ processed pax header parsing. Following 'path'
+ header (lower priority) will be ignored. */
+
size_t xattr_map_size; /* Size of the xattr map */
struct xattr_array *xattr_map;
diff --git a/src/xheader.c b/src/xheader.c
index 8dda580..335ddaf 100644
--- a/src/xheader.c
+++ b/src/xheader.c
@@ -1291,16 +1291,34 @@ path_coder (struct tar_stat_info const *st, char const *keyword,
}
static void
-path_decoder (struct tar_stat_info *st,
- char const *keyword __attribute__((unused)),
- char const *arg,
- size_t size __attribute__((unused)))
+raw_path_decoder (struct tar_stat_info *st, char const *arg)
{
decode_string (&st->orig_file_name, arg);
decode_string (&st->file_name, arg);
st->had_trailing_slash = strip_trailing_slashes (st->file_name);
}
+
+static void
+path_decoder (struct tar_stat_info *st,
+ char const *keyword __attribute__((unused)),
+ char const *arg,
+ size_t size __attribute__((unused)))
+{
+ if (! st->sparse_name_done)
+ raw_path_decoder (st, arg);
+}
+
+static void
+sparse_path_decoder (struct tar_stat_info *st,
+ char const *keyword __attribute__((unused)),
+ char const *arg,
+ size_t size __attribute__((unused)))
+{
+ st->sparse_name_done = true;
+ raw_path_decoder (st, arg);
+}
+
static void
size_coder (struct tar_stat_info const *st, char const *keyword,
struct xheader *xhdr, void const *data __attribute__ ((unused)))
@@ -1730,7 +1748,7 @@ struct xhdr_tab const xhdr_tab[] = {
{ "uname", uname_coder, uname_decoder, 0, false },
/* Sparse file handling */
- { "GNU.sparse.name", path_coder, path_decoder,
+ { "GNU.sparse.name", path_coder, sparse_path_decoder,
XHDR_PROTECTED, false },
{ "GNU.sparse.major", sparse_major_coder, sparse_major_decoder,
XHDR_PROTECTED, false },
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 0ea6d17..5f68583 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -214,6 +214,7 @@ TESTSUITE_AT = \
sparse04.at\
sparse05.at\
sparse06.at\
+ sparse07.at\
sparsemv.at\
sparsemvp.at\
spmvp00.at\
diff --git a/tests/sparse07.at b/tests/sparse07.at
new file mode 100644
index 0000000..8191c00
--- /dev/null
+++ b/tests/sparse07.at
@@ -0,0 +1,35 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 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/>.
+
+AT_SETUP([sparse files with unicode names])
+AT_KEYWORDS([sparse sparse07 unicode])
+
+AT_TAR_CHECK([
+genfile --sparse --file žluť --block-size 512 0 ABCD 1M EFGH 2000K IJKL || AT_SKIP_TEST
+tar -c -f archive --sparse žluť || exit 1
+
+tar tf archive
+],
+[0],
+[\305\276lu\305\245
+],
+[],[],[],[posix, gnu, oldgnu])
+
+AT_CLEANUP
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 11c39c9..44afa34 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -386,6 +386,7 @@ m4_include([sparse03.at])
m4_include([sparse04.at])
m4_include([sparse05.at])
m4_include([sparse06.at])
+m4_include([sparse07.at])
m4_include([sparsemv.at])
m4_include([spmvp00.at])
m4_include([spmvp01.at])
--
2.7.4
