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.
57 lines
1.5 KiB
Plaintext
57 lines
1.5 KiB
Plaintext
# Process this file with autom4te to create testsuite. -*- Autotest -*-
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#
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# Test suite for GNU tar.
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# Copyright 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([storing sparse file using seek method])
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AT_KEYWORDS([sparse sparse06])
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m4_define([check_pattern],[
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rm -rf out archive.tar smallsparse && mkdir out
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genfile --sparse --file smallsparse $1
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tar -cSf archive.tar smallsparse
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tar -xf archive.tar -C out
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cmp smallsparse out/smallsparse
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])
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AT_TAR_CHECK([
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AT_SEEKHOLE_PREREQ
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AT_TIMEOUT_PREREQ
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TAR_OPTIONS="$TAR_OPTIONS --hole-detection=seek"
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genfile --sparse --file bigsparse 0 ABC 8G DEF
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timeout 2 tar -cSf a bigsparse
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test $? -eq 0 || exit 1
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check_pattern([0 ABC])
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check_pattern([0 ABC 10M])
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check_pattern([0 ABC 10M DEF])
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check_pattern([10M])
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check_pattern([10M ABC])
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check_pattern([10M ABC 20M])
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check_pattern([10M DEF 20M GHI 30M JKL 40M])
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],
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[0],,
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[genfile: created file is not sparse
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],,,[posix])
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AT_CLEANUP
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