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From 77cef4ee39ee083838e5cf2137b0f344b49afb6a Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <praiskup@redhat.com>
Date: Tue, 29 Jan 2013 10:39:30 +0100
Subject: [PATCH 1/4] Fix bug in sparse file listing
List posix archives containing sparse files >8GB correctly and do not fail.
This fixes also bug in format of listing for sparse files >8GB - now the
real size is printed instead of the effective one (this is not strictly
posix format related).
* src/list.c: Remove redundant assignment.
* src/tar.h: Add new 'real_size' and 'real_size_set' fields in
tar_stat_info struct.
* src/xheader.c: Correctly handle (especially sparse) file sizes directly in
xheader_decode().
---
src/list.c | 1 -
src/tar.h | 4 ++++
src/xheader.c | 15 ++++++++++++++-
3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/src/list.c b/src/list.c
index dd501a9..6db36d1 100644
--- a/src/list.c
+++ b/src/list.c
@@ -670,7 +670,6 @@ decode_header (union block *header, struct tar_stat_info *stat_info,
}
}
- stat_info->archive_file_size = stat_info->stat.st_size;
xheader_decode (stat_info);
if (sparse_member_p (stat_info))
diff --git a/src/tar.h b/src/tar.h
index b181e58..690c146 100644
--- a/src/tar.h
+++ b/src/tar.h
@@ -327,6 +327,10 @@ struct tar_stat_info
size_t sparse_map_size; /* Size of the sparse map */
struct sp_array *sparse_map;
+ off_t real_size; /* The real size of sparse file */
+ int real_size_set; /* True when GNU.sparse.realsize is set in
+ archived file */
+
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 be793d4..708aece 100644
--- a/src/xheader.c
+++ b/src/xheader.c
@@ -764,6 +764,16 @@ xheader_decode (struct tar_stat_info *st)
continue;
}
run_override_list (keyword_override_list, st);
+
+ /* The archived (effective) file size is always set directly in tar header
+ field, possibly overridden by "size" extended header - in both cases,
+ result is now decoded in st->stat.st_size */
+ st->archive_file_size = st->stat.st_size;
+
+ /* The real file size (given by stat()) may be redefined for sparse
+ files in "GNU.sparse.realsize" extended header */
+ if (st->real_size_set)
+ st->stat.st_size = st->real_size;
}
static void
@@ -1438,7 +1435,10 @@ sparse_size_decoder (struct tar_stat_info *st,
{
uintmax_t u;
if (decode_num (&u, arg, TYPE_MAXIMUM (off_t), keyword))
- st->stat.st_size = u;
+ {
+ st->real_size_set = 1;
+ st->real_size = u;
+ }
}
static void
--
2.13.5
From 198d4621b2a367986c71cd2489c1465ec3be89dc Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org>
Date: Fri, 7 Nov 2014 11:47:44 +0200
Subject: [PATCH 2/4] Add testcase for the previous commit.
* tests/sparse05.at: New file.
* tests/Makefile.am: Add sparse05.at
* tests/testsuite.at: Include sparse05.at
---
tests/Makefile.am | 1 +
tests/sparse05.at | 46 ++++++++++++++++++++++++++++++++++++++++++++++
tests/testsuite.at | 1 +
3 files changed, 48 insertions(+)
create mode 100644 tests/sparse05.at
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8e1ef8d..094b71c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -171,6 +171,7 @@ TESTSUITE_AT = \
sparse02.at\
sparse03.at\
sparse04.at\
+ sparse05.at\
sparsemv.at\
sparsemvp.at\
spmvp00.at\
diff --git a/tests/sparse05.at b/tests/sparse05.at
new file mode 100644
index 0000000..72f3274
--- /dev/null
+++ b/tests/sparse05.at
@@ -0,0 +1,46 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+#
+# Test suite for GNU tar.
+# Copyright 2014 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([listing sparse files bigger than 2^33 B])
+AT_KEYWORDS([sparse sparse05])
+
+# Description: If an archive in POSIX.1-2001 archive contained a sparse file
+# member whose real size (excluding zero blocks) is bigger than 2^33 bytes,
+# tar 1.28 would incorrectly list the real member size.
+# Reported by: Pavel Raiskup <praiskup@redhat.com>
+# References: <1359119879.15037.4.camel@raiskup>,
+# http://lists.gnu.org/archive/html/bug-tar/2013-01/msg00001.html
+
+AT_TAR_CHECK([
+(echo 0 =2560
+for i in `seq 1 999`; do
+ echo 10M =2560
+done) | genfile --sparse --file BIGFILE --block-size 4K - || AT_SKIP_TEST
+tar -f - -c --sparse --posix BIGFILE | tar tvf - | awk '{ print $3, $(NF) }'
+],
+[0],
+[20961034240 BIGFILE
+],
+[],
+[],
+[],
+[pax])
+
+AT_CLEANUP
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 3eb0eee..f7f00ee 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -308,6 +308,7 @@ m4_include([sparse01.at])
m4_include([sparse02.at])
m4_include([sparse03.at])
m4_include([sparse04.at])
+m4_include([sparse05.at])
m4_include([sparsemv.at])
m4_include([spmvp00.at])
m4_include([spmvp01.at])
--
2.13.5
From 8a795036f08bca508c3f3425f41c566562573e5f Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org>
Date: Fri, 7 Nov 2014 11:37:33 +0200
Subject: [PATCH 3/4] genfile: improve sparse mode
Paxutils: 45af1632aa64a5ba1b108e248920e67c180e8485
* tests/genfile.c (generate_sparse_file): Handle '-' argument
(read from stdin);
If content strings starts with '=', treat it as fragment size and
use default pattern to fill it.
* doc/genfile.texi: Document changes to genfile.
---
doc/genfile.texi | 31 +++++++++++++++-------
tests/genfile.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++-------
2 files changed, 91 insertions(+), 19 deletions(-)
diff --git a/doc/genfile.texi b/doc/genfile.texi
index b37e26e..b993b9b 100644
--- a/doc/genfile.texi
+++ b/doc/genfile.texi
@@ -124,9 +124,8 @@ the rest of the command line specifies a so-called @dfn{file map}.
descriptors}. Each descriptor is composed of two values: a number,
specifying fragment offset from the end of the previous fragment or,
for the very first fragment, from the beginning of the file, and
-@dfn{contents string}, i.e., a string of characters, specifying the
-pattern to fill the fragment with. File offset can be suffixed with
-the following quantifiers:
+@dfn{contents string}, that specifies the pattern to fill the fragment
+with. File offset can be suffixed with the following quantifiers:
@table @samp
@item k
@@ -140,17 +139,29 @@ The number is expressed in megabytes.
The number is expressed in gigabytes.
@end table
- For each letter in contents string @command{genfile} will generate
-a @dfn{block} of data, filled with this letter and will write it to
-the fragment. The size of block is given by @option{--block-size}
-option. It defaults to 512. Thus, if the string consists of @var{n}
-characters, the resulting file fragment will contain
-@code{@var{n}*@var{block-size}} of data.
+ Contents string can be either a fragment size or a pattern.
+Fragment size is a decimal number, prefixed with an equals sign. It
+can be suffixed with a quantifier, as discussed above. If fragment
+size is given, the fragment of that size will be filled with the
+currently selected pattern (@pxref{Generate Mode, --pattern}) and
+written to the file.
- Last fragment descriptor can have only file offset part. In this
+ A pattern is a string of arbitrary ASCII characters. For each
+of them, @command{genfile} will generate a @dfn{block} of data,
+filled with that character and will write it to the fragment. The size
+of block is given by @option{--block-size} option. It defaults to 512.
+Thus, if pattern consists of @var{n} characters, the resulting file
+fragment will contain @code{@var{n}*@var{block-size}} bytes of data.
+
+ The last fragment descriptor can have only file offset part. In this
case @command{genfile} will create a hole at the end of the file up to
the given offset.
+ A dash appearing as a fragment descriptor instructs
+@command{genfile} to read file map from the standard input. Each line
+of input should consist of fragment offset and contents string,
+separated by any amount of whitespace.
+
For example, consider the following invocation:
@smallexample
diff --git a/tests/genfile.c b/tests/genfile.c
index fa480ef..d41336b 100644
--- a/tests/genfile.c
+++ b/tests/genfile.c
@@ -32,6 +32,7 @@
#include <inttostr.h>
#include <fcntl.h>
#include <sys/stat.h>
+#include <c-ctype.h>
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
#include <obstack.h>
@@ -506,6 +507,53 @@ mksparse (int fd, off_t displ, char *marks)
}
}
+static int
+make_fragment (int fd, char *offstr, char *mapstr)
+{
+ int i;
+ off_t displ = get_size (offstr, 1);
+
+ file_length += displ;
+
+ if (!mapstr || !*mapstr)
+ {
+ mkhole (fd, displ);
+ return 1;
+ }
+ else if (*mapstr == '=')
+ {
+ off_t n = get_size (mapstr + 1, 1);
+
+ switch (pattern)
+ {
+ case DEFAULT_PATTERN:
+ for (i = 0; i < block_size; i++)
+ buffer[i] = i & 255;
+ break;
+
+ case ZEROS_PATTERN:
+ memset (buffer, 0, block_size);
+ break;
+ }
+
+ if (lseek (fd, displ, SEEK_CUR) == -1)
+ error (EXIT_FAILURE, errno, "lseek");
+
+ for (; n; n--)
+ {
+ if (write (fd, buffer, block_size) != block_size)
+ error (EXIT_FAILURE, errno, "write");
+ file_length += block_size;
+ }
+ }
+ else
+ {
+ file_length += block_size * strlen (mapstr);
+ mksparse (fd, displ, mapstr);
+ }
+ return 0;
+}
+
static void
generate_sparse_file (int argc, char **argv)
{
@@ -526,20 +574,33 @@ generate_sparse_file (int argc, char **argv)
file_length = 0;
- for (i = 0; i < argc; i += 2)
+ while (argc)
{
- off_t displ = get_size (argv[i], 1);
- file_length += displ;
+ if (argv[0][0] == '-' && argv[0][1] == 0)
+ {
+ char buf[256];
+ while (fgets (buf, sizeof (buf), stdin))
+ {
+ size_t n = strlen (buf);
- if (i == argc-1)
- {
- mkhole (fd, displ);
- break;
+ while (n > 0 && c_isspace (buf[n-1]))
+ buf[--n] = 0;
+
+ n = strcspn (buf, " \t");
+ buf[n++] = 0;
+ while (buf[n] && c_isblank (buf[n]))
+ ++n;
+ make_fragment (fd, buf, buf + n);
+ }
+ ++argv;
+ --argc;
}
else
{
- file_length += block_size * strlen (argv[i+1]);
- mksparse (fd, displ, argv[i+1]);
+ if (make_fragment (fd, argv[0], argv[1]))
+ break;
+ argc -= 2;
+ argv += 2;
}
}
--
2.13.5
From 29e35df407d6c7b1e1ff57f7ef2030a253132a8a Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <praiskup@redhat.com>
Date: Fri, 4 Dec 2015 19:36:14 +0100
Subject: [PATCH 4/4] genfile: remove unused variable
paxutils: 58b8ac114790e2de7992db1a387ec14238783f39
* tests/genfile.c (generate_sparse_file): Remove unused 'i'.
---
tests/genfile.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/tests/genfile.c b/tests/genfile.c
index d41336b..4699d21 100644
--- a/tests/genfile.c
+++ b/tests/genfile.c
@@ -557,7 +557,6 @@ make_fragment (int fd, char *offstr, char *mapstr)
static void
generate_sparse_file (int argc, char **argv)
{
- int i;
int fd;
int flags = O_CREAT | O_RDWR | O_BINARY;
--
2.13.5