b684326e69
Based on patch by Pavel Raiskup. Use SEEK_HOLE/SEEK_DATA feature of lseek on systems that support it. This can make archiving of sparse files much faster. Implement the --hole-detection option to allow users to select hole-detection method. * src/common.h (hole_detection_method): New enum. (hole_detection): New global. * src/sparse.c (sparse_scan_file_wholesparse): New function as a method for detecting sparse files without any data. (sparse_scan_file_raw): Rename from sparse_scan_file; with edits. (sparse_scan_file_seek): New function. (sparse_scan_file): Reimplement function. * src/tar.c: New option --hole-detection * tests/checkseekhole.c: New file. * tests/.gitignore: Mention two test binaries. * tests/Makefile.am: Add new tests. * tests/testsuite.at (AT_SEEKHOLE_PREREQ): New macro. Include sparse06.at. * tests/sparse06.at: New test case. * tests/sparse02.at: Force raw hole-detection method. * tests/sparsemv.at: Likewise. * tests/sparsemvp.at: Likewise. * doc/tar.1: Document --hole-detection option. * doc/tar.texi: Document hole-detection algorithms and command-line options. * NEWS: Document hole-detection.
67 lines
2.2 KiB
Plaintext
67 lines
2.2 KiB
Plaintext
# Process this file with autom4te to create testsuite. -*- Autotest -*-
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# Test suite for GNU tar.
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# Copyright 2005-2008, 2013-2014 Free Software Foundation, Inc.
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# This file is part of GNU tar.
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# GNU tar is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# GNU tar is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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AT_SETUP([sparse files in MV archives])
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AT_KEYWORDS([sparse multiv sparsemv])
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# Check if sparse files are correctly split between GNU multi-volume
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# archives.
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# There are two cases: the file can be split within an empty (null) block,
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# or within a data block. Since null blocks are not archived, the first
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# case means the file is split between two consecutive data blocks.
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#
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AT_TAR_CHECK([
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exec <&-
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TAR_OPTIONS="$TAR_OPTIONS --hole-detection=raw"
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genfile --sparse --file sparsefile 0 ABCDEFGHIJK 1M ABCDEFGHI || AT_SKIP_TEST
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echo "Pass 1: Split between data blocks"
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echo "Create archive"
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tar --sparse -c --record-size=512 -M -L6 -f arc.1 -f arc.2 sparsefile || exit 1
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echo "Test archive"
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tar --record-size=512 -t -M -f arc.1 -f arc.2
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echo "Compare archive"
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tar --record-size=512 -d -M -f arc.1 -f arc.2
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echo "Pass 2: Split within a data block"
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genfile --sparse --file sparsefile 0 ABCDEFGHIJ 1M ABCDEFGHI || AT_SKIP_TEST
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echo "Create archive"
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tar --sparse -c --record-size=512 -M -L6 -f arc.1 -f arc.2 sparsefile || exit 1
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echo "Test archive"
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tar --record-size=512 -t -M -f arc.1 -f arc.2
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echo "Compare archive"
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tar --record-size=512 -d -M -f arc.1 -f arc.2
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],
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[0],
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[Pass 1: Split between data blocks
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Create archive
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Test archive
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sparsefile
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Compare archive
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Pass 2: Split within a data block
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Create archive
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Test archive
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sparsefile
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Compare archive
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],
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[],[],[],[gnu, oldgnu])
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AT_CLEANUP
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