testsuite/tar.tests - busybox - Git at Google

 #!/bin/sh
 # Copyright 2009 by Denys Vlasenko
 # Licensed under GPLv2, see file LICENSE in this source tree.

 . ./testing.sh

 unset LANG
 unset LANGUAGE
 unset LC_COLLATE
 unset LC_ALL
 umask 022

 # testing "test name" "script" "expected result" "file input" "stdin"

 testing "Empty file is not a tarball" '\
 tar xvf - 2>&1; echo $?
 ' "\
 tar: short read
 1
 " \
 "" ""
 SKIP=

 optional FEATURE_SEAMLESS_GZ GUNZIP
 # In NOMMU case, "invalid magic" message comes from gunzip child process.
 # Otherwise, it comes from tar.
 # Need to fix output up to avoid false positive.
 testing "Empty file is not a tarball.tar.gz" '\
 { tar xvzf - 2>&1; echo $?; } | grep -Fv "invalid magic"
 ' "\
 tar: short read
 1
 " \
 "" ""
 SKIP=

 testing "Two zeroed blocks is a ('truncated') empty tarball" '\
 dd if=/dev/zero bs=512 count=2 2>/dev/null | tar xvf - 2>&1; echo $?
 ' "\
 0
 " \
 "" ""
 SKIP=

 testing "Twenty zeroed blocks is an empty tarball" '\
 dd if=/dev/zero bs=512 count=20 2>/dev/null | tar xvf - 2>&1; echo $?
 ' "\
 0
 " \
 "" ""
 SKIP=

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 # "tar cf test.tar input input_dir/ input_hard1 input_hard2 input_hard1 input_dir/ input":
 # GNU tar 1.26 records as hardlinks:
 #  input_hard2 -> input_hard1
 #  input_hard1 -> input_hard1 (!!!)
 #  input_dir/file -> input_dir/file
 #  input -> input
 # As of 1.24.0, we don't record last two: for them, nlink==1
 # and we check for "hardlink"ness only files with nlink!=1
 # We also don't use "hrw-r--r--" notation for hardlinks in "tar tv" listing.
 optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
 testing "tar hardlinks and repeated files" '\
 >input_hard1
 ln input_hard1 input_hard2
 mkdir input_dir
 >input_dir/file
 chmod -R 644 *
 chmod    755 input_dir
 tar cf test.tar input input_dir/ input_hard1 input_hard2 input_hard1 input_dir/ input
 tar tvf test.tar | sed "s/.*[0-9] input/input/"
 rm -rf input_dir
 tar xf test.tar 2>&1
 echo Ok: $?
 ls -l . input_dir/* | grep input_ | sed "s/\\(^[^ ]*\\) .* input/\\1 input/"
 ' "\
 input
 input_dir/
 input_dir/file
 input_hard1
 input_hard2 -> input_hard1
 input_hard1 -> input_hard1
 input_dir/
 input_dir/file
 input
 Ok: 0
 -rw-r--r-- input_dir/file
 drwxr-xr-x input_dir
 -rw-r--r-- input_hard1
 -rw-r--r-- input_hard2
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
 testing "tar hardlinks mode" '\
 >input_hard1
 chmod 741 input_hard1
 ln input_hard1 input_hard2
 mkdir input_dir
 ln input_hard1 input_dir
 ln input_hard2 input_dir
 chmod 550 input_dir
 # On some filesystems, input_dir/input_hard2 is returned by readdir
 # BEFORE input_dir/input_hard1! Thats why we cant just "tar cf ... input_*":
 tar cf test.tar input_dir/input_hard* input_hard*
 tar tvf test.tar | sed "s/.*[0-9] input/input/"
 chmod 770 input_dir
 rm -rf input_*
 tar xf test.tar 2>&1
 echo Ok: $?
 ls -l . input_dir/* | grep "input.*hard" | sed "s/\\(^[^ ]*\\) .* input/\\1 input/"
 ' "\
 input_dir/input_hard1
 input_dir/input_hard2 -> input_dir/input_hard1
 input_hard1 -> input_dir/input_hard1
 input_hard2 -> input_dir/input_hard1
 Ok: 0
 -rwxr----x input_dir/input_hard1
 -rwxr----x input_dir/input_hard2
 -rwxr----x input_hard1
 -rwxr----x input_hard2
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
 testing "tar symlinks mode" '\
 >input_file
 chmod 741 input_file
 ln -s input_file input_soft
 mkdir input_dir
 ln input_file input_dir
 ln input_soft input_dir
 chmod 550 input_dir
 tar cf test.tar input_dir/* input_[fs]*
 tar tvf test.tar | sed "s/.*[0-9] input/input/" | sort
 chmod 770 input_dir
 rm -rf input_*
 tar xf test.tar 2>&1
 echo Ok: $?
 ls -l . input_dir/* | grep "input_[fs]" | sed "s/\\(^[^ ]*\\) .* input/\\1 input/"
 ' "\
 input_dir/input_file
 input_dir/input_soft -> input_file
 input_file -> input_dir/input_file
 input_soft -> input_dir/input_soft
 Ok: 0
 -rwxr----x input_dir/input_file
 lrwxrwxrwx input_file
 -rwxr----x input_file
 lrwxrwxrwx input_file
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 optional FEATURE_TAR_CREATE FEATURE_TAR_LONG_OPTIONS
 testing "tar --overwrite" "\
 ln input input_hard
 tar cf test.tar input_hard
 echo WRONG >input
 # --overwrite opens 'input_hard' without unlinking,
 # thus 'input_hard' still linked to 'input' and we write 'Ok' into it
 tar xf test.tar --overwrite 2>&1 && cat input
 " "\
 Ok
 " \
 "Ok\n" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 test x"$SKIP_KNOWN_BUGS" = x"" && {
 # Needs to be run under non-root for meaningful test
 optional FEATURE_TAR_CREATE
 testing "tar writing into read-only dir" '\
 mkdir input_dir
 >input_dir/input_file
 chmod 550 input_dir
 tar cf test.tar input_dir
 tar tvf test.tar | sed "s/.*[0-9] input/input/"
 chmod 770 input_dir
 rm -rf input_*
 tar xf test.tar 2>&1
 echo Ok: $?
 ls -l input_dir/* . | grep input_ | sed "s/\\(^[^ ]*\\) .* input/\\1 input/"
 chmod 770 input_dir
 ' "\
 input_dir/
 input_dir/input_file
 Ok: 0
 -rw-r--r-- input_dir/input_file
 dr-xr-x--- input_dir
 " \
 "" ""
 SKIP=
 }
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 # Had a bug where on extract autodetect first "switched off" -z
 # and then failed to recognize .tgz extension
 optional FEATURE_TAR_CREATE FEATURE_SEAMLESS_GZ GUNZIP
 testing "tar extract tgz" "\
 dd count=1 bs=1M if=/dev/zero of=F0 2>/dev/null
 tar -czf F0.tgz F0
 rm F0
 tar -xzvf F0.tgz && echo Ok
 rm F0 || echo BAD
 " "\
 F0
 Ok
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 # Do we detect XZ-compressed data (even w/o .tar.xz or txz extension)?
 # (the uuencoded hello_world.txz contains one empty file named "hello_world")
 optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_XZ
 testing "tar extract txz" "\
 uudecode -o input && tar tf input && echo Ok
 " "\
 hello_world
 Ok
 " \
 "" "\
 begin-base64 644 hello_world.txz
 /Td6WFoAAATm1rRGAgAhARYAAAB0L+Wj4AX/AEldADQZSe6ODIZQ3rSQ8kAJ
 SnMPTX+XWGKW3Yu/Rwqg4Ik5wqgQKgVH97J8yA8IvZ4ahaCQogUNHRkXibr2
 Q615wcb2G7fJU49AhWAAAAAAUA8gu9DyXfAAAWWADAAAAB5FXGCxxGf7AgAA
 AAAEWVo=
 ====
 "
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 # On extract, everything up to and including last ".." component is stripped
 optional FEATURE_TAR_CREATE
 testing "tar strips /../ on extract" "\
 rm -rf input_* test.tar 2>/dev/null
 mkdir input_dir
 echo Ok >input_dir/file
 tar cf test.tar ./../tar.tempdir/input_dir/../input_dir 2>&1
 rm -rf input_* 2>/dev/null
 tar -vxf test.tar 2>&1
 cat input_dir/file 2>&1
 " "\
 tar: removing leading './../tar.tempdir/input_dir/../' from member names
 input_dir/
 input_dir/file
 Ok
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 # attack.tar.bz2 has symlink pointing to a system file
 # followed by a regular file with the same name
 # containing "root::0:0::/root:/bin/sh":
 #  lrwxrwxrwx root/root passwd -> /tmp/passwd
 #  -rw-r--r-- root/root passwd
 # naive tar implementation may end up creating the symlink
 # and then writing into it.
 # The correct implementation unlinks target before
 # creating the second file.
 # We test that /tmp/passwd remains empty:
 optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_BZ2
 testing "tar does not extract into symlinks" "\
 >>/tmp/passwd && uudecode -o input && tar xf input 2>&1 && rm passwd; cat /tmp/passwd; echo \$?
 " "\
 tar: can't create symlink 'passwd' to '/tmp/passwd'
 0
 " \
 "" "\
 begin-base64 644 attack.tar.bz2
 QlpoOTFBWSZTWRVn/bIAAKt7hMqwAEBAAP2QAhB0Y96AAACACCAAlISgpqe0
 po0DIaDynqAkpDRP1ANAhiYNSPR8VchKhAz0AK59+DA6FcMKBggOARIJdVHL
 DGllrjs20ATUgR1HmccBX3EhoMnpMJaNyggmxgLDMz54lBnBTJO/1L1lbMS4
 l4/V8LDoe90yiWJhOJvIypgEfxdyRThQkBVn/bI=
 ====
 "
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 # And same with -k
 optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_BZ2
 testing "tar -k does not extract into symlinks" "\
 >>/tmp/passwd && uudecode -o input && tar xf input -k 2>&1 && rm passwd; cat /tmp/passwd; echo \$?
 " "\
 tar: can't create symlink 'passwd' to '/tmp/passwd'
 0
 " \
 "" "\
 begin-base64 644 attack.tar.bz2
 QlpoOTFBWSZTWRVn/bIAAKt7hMqwAEBAAP2QAhB0Y96AAACACCAAlISgpqe0
 po0DIaDynqAkpDRP1ANAhiYNSPR8VchKhAz0AK59+DA6FcMKBggOARIJdVHL
 DGllrjs20ATUgR1HmccBX3EhoMnpMJaNyggmxgLDMz54lBnBTJO/1L1lbMS4
 l4/V8LDoe90yiWJhOJvIypgEfxdyRThQkBVn/bI=
 ====
 "
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 optional UNICODE_SUPPORT FEATURE_TAR_GNU_EXTENSIONS FEATURE_SEAMLESS_BZ2 FEATURE_TAR_AUTODETECT
 testing "Pax-encoded UTF8 names and symlinks" '\
 tar xvf ../tar.utf8.tar.bz2 2>&1; echo $?
 export LANG=en_US.UTF-8
 ls -l etc/ssl/certs/* | sed "s:.*etc/:etc/:" | sort
 unset LANG
 rm -rf etc usr
 ' "\
 etc/ssl/certs/3b2716e5.0
 etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem
 etc/ssl/certs/f80cc7f6.0
 usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt
 0
 etc/ssl/certs/3b2716e5.0 -> EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem
 etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem -> /usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt
 etc/ssl/certs/f80cc7f6.0 -> EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 optional FEATURE_SEAMLESS_BZ2 FEATURE_TAR_AUTODETECT LS
 testing "Symlink attack: create symlink and then write through it" '\
 exec 2>&1
 uudecode -o input && tar xvf input; echo $?
 ls /tmp/bb_test_evilfile
 ls bb_test_evilfile
 ls symlink/bb_test_evilfile
 ' "\
 anything.txt
 symlink
 symlink/bb_test_evilfile
 tar: can't create symlink 'symlink' to '/tmp'
 1
 ls: /tmp/bb_test_evilfile: No such file or directory
 ls: bb_test_evilfile: No such file or directory
 symlink/bb_test_evilfile
 " \
 "" "\
 begin-base64 644 tar_symlink_attack.tar.bz2
 QlpoOTFBWSZTWZgs7bQAALT/hMmQAFBAAf+AEMAGJPPv32AAAIAIMAC5thlR
 omAjAmCMADQT1BqNE0AEwAAjAEwElTKeo9NTR6h6gaeoA0DQNLVdwZZ5iNTk
 AQwCAV6S00QFJYhrlfFkVCEDEGtgNVqYrI0uK3ggnt30gqk4e1TTQm5QIAKa
 SJqzRGSFLMmOloHSAcvLiFxxRiQtQZF+qPxbo173ZDISOAoNoPN4PQPhBhKS
 n8fYaKlioCTzL2oXYczyUUIP4u5IpwoSEwWdtoA=
 ====
 "
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 mkdir tar.tempdir && cd tar.tempdir || exit 1
 optional FEATURE_TAR_CREATE
 testing "Symlinks and hardlinks coexist" '\
 mkdir dir
 >dir/a
 ln -s ../dir/a dir/b
 ln dir/b dir/c
 mkdir new
 tar cf - dir/* | tar -C new -xvf - 2>&1
 ' "\
 dir/a
 dir/b
 dir/c
 " \
 "" ""
 SKIP=
 cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null

 exit $FAILCOUNT
	#!/bin/sh
	# Copyright 2009 by Denys Vlasenko
	# Licensed under GPLv2, see file LICENSE in this source tree.

	. ./testing.sh

	unset LANG
	unset LANGUAGE
	unset LC_COLLATE
	unset LC_ALL
	umask 022

	# testing "test name" "script" "expected result" "file input" "stdin"

	testing "Empty file is not a tarball" '\
	tar xvf - 2>&1; echo $?
	' "\
	tar: short read
	1
	" \
	"" ""
	SKIP=

	optional FEATURE_SEAMLESS_GZ GUNZIP
	# In NOMMU case, "invalid magic" message comes from gunzip child process.
	# Otherwise, it comes from tar.
	# Need to fix output up to avoid false positive.
	testing "Empty file is not a tarball.tar.gz" '\
	{ tar xvzf - 2>&1; echo $?; } \| grep -Fv "invalid magic"
	' "\
	tar: short read
	1
	" \
	"" ""
	SKIP=

	testing "Two zeroed blocks is a ('truncated') empty tarball" '\
	dd if=/dev/zero bs=512 count=2 2>/dev/null \| tar xvf - 2>&1; echo $?
	' "\
	0
	" \
	"" ""
	SKIP=

	testing "Twenty zeroed blocks is an empty tarball" '\
	dd if=/dev/zero bs=512 count=20 2>/dev/null \| tar xvf - 2>&1; echo $?
	' "\
	0
	" \
	"" ""
	SKIP=

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	# "tar cf test.tar input input_dir/ input_hard1 input_hard2 input_hard1 input_dir/ input":
	# GNU tar 1.26 records as hardlinks:
	# input_hard2 -> input_hard1
	# input_hard1 -> input_hard1 (!!!)
	# input_dir/file -> input_dir/file
	# input -> input
	# As of 1.24.0, we don't record last two: for them, nlink==1
	# and we check for "hardlink"ness only files with nlink!=1
	# We also don't use "hrw-r--r--" notation for hardlinks in "tar tv" listing.
	optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
	testing "tar hardlinks and repeated files" '\
	>input_hard1
	ln input_hard1 input_hard2
	mkdir input_dir
	>input_dir/file
	chmod -R 644 *
	chmod 755 input_dir
	tar cf test.tar input input_dir/ input_hard1 input_hard2 input_hard1 input_dir/ input
	tar tvf test.tar \| sed "s/.*[0-9] input/input/"
	rm -rf input_dir
	tar xf test.tar 2>&1
	echo Ok: $?
	ls -l . input_dir/* \| grep input_ \| sed "s/\\(^[^ ]\\) . input/\\1 input/"
	' "\
	input
	input_dir/
	input_dir/file
	input_hard1
	input_hard2 -> input_hard1
	input_hard1 -> input_hard1
	input_dir/
	input_dir/file
	input
	Ok: 0
	-rw-r--r-- input_dir/file
	drwxr-xr-x input_dir
	-rw-r--r-- input_hard1
	-rw-r--r-- input_hard2
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
	testing "tar hardlinks mode" '\
	>input_hard1
	chmod 741 input_hard1
	ln input_hard1 input_hard2
	mkdir input_dir
	ln input_hard1 input_dir
	ln input_hard2 input_dir
	chmod 550 input_dir
	# On some filesystems, input_dir/input_hard2 is returned by readdir
	# BEFORE input_dir/input_hard1! Thats why we cant just "tar cf ... input_*":
	tar cf test.tar input_dir/input_hard* input_hard*
	tar tvf test.tar \| sed "s/.*[0-9] input/input/"
	chmod 770 input_dir
	rm -rf input_*
	tar xf test.tar 2>&1
	echo Ok: $?
	ls -l . input_dir/* \| grep "input.hard" \| sed "s/\\(^[^ ]\\) .* input/\\1 input/"
	' "\
	input_dir/input_hard1
	input_dir/input_hard2 -> input_dir/input_hard1
	input_hard1 -> input_dir/input_hard1
	input_hard2 -> input_dir/input_hard1
	Ok: 0
	-rwxr----x input_dir/input_hard1
	-rwxr----x input_dir/input_hard2
	-rwxr----x input_hard1
	-rwxr----x input_hard2
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
	testing "tar symlinks mode" '\
	>input_file
	chmod 741 input_file
	ln -s input_file input_soft
	mkdir input_dir
	ln input_file input_dir
	ln input_soft input_dir
	chmod 550 input_dir
	tar cf test.tar input_dir/* input_[fs]*
	tar tvf test.tar \| sed "s/.*[0-9] input/input/" \| sort
	chmod 770 input_dir
	rm -rf input_*
	tar xf test.tar 2>&1
	echo Ok: $?
	ls -l . input_dir/* \| grep "input_[fs]" \| sed "s/\\(^[^ ]\\) . input/\\1 input/"
	' "\
	input_dir/input_file
	input_dir/input_soft -> input_file
	input_file -> input_dir/input_file
	input_soft -> input_dir/input_soft
	Ok: 0
	-rwxr----x input_dir/input_file
	lrwxrwxrwx input_file
	-rwxr----x input_file
	lrwxrwxrwx input_file
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	optional FEATURE_TAR_CREATE FEATURE_TAR_LONG_OPTIONS
	testing "tar --overwrite" "\
	ln input input_hard
	tar cf test.tar input_hard
	echo WRONG >input
	# --overwrite opens 'input_hard' without unlinking,
	# thus 'input_hard' still linked to 'input' and we write 'Ok' into it
	tar xf test.tar --overwrite 2>&1 && cat input
	" "\
	Ok
	" \
	"Ok\n" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	test x"$SKIP_KNOWN_BUGS" = x"" && {
	# Needs to be run under non-root for meaningful test
	optional FEATURE_TAR_CREATE
	testing "tar writing into read-only dir" '\
	mkdir input_dir
	>input_dir/input_file
	chmod 550 input_dir
	tar cf test.tar input_dir
	tar tvf test.tar \| sed "s/.*[0-9] input/input/"
	chmod 770 input_dir
	rm -rf input_*
	tar xf test.tar 2>&1
	echo Ok: $?
	ls -l input_dir/* . \| grep input_ \| sed "s/\\(^[^ ]\\) . input/\\1 input/"
	chmod 770 input_dir
	' "\
	input_dir/
	input_dir/input_file
	Ok: 0
	-rw-r--r-- input_dir/input_file
	dr-xr-x--- input_dir
	" \
	"" ""
	SKIP=
	}
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	# Had a bug where on extract autodetect first "switched off" -z
	# and then failed to recognize .tgz extension
	optional FEATURE_TAR_CREATE FEATURE_SEAMLESS_GZ GUNZIP
	testing "tar extract tgz" "\
	dd count=1 bs=1M if=/dev/zero of=F0 2>/dev/null
	tar -czf F0.tgz F0
	rm F0
	tar -xzvf F0.tgz && echo Ok
	rm F0 \|\| echo BAD
	" "\
	F0
	Ok
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	# Do we detect XZ-compressed data (even w/o .tar.xz or txz extension)?
	# (the uuencoded hello_world.txz contains one empty file named "hello_world")
	optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_XZ
	testing "tar extract txz" "\
	uudecode -o input && tar tf input && echo Ok
	" "\
	hello_world
	Ok
	" \
	"" "\
	begin-base64 644 hello_world.txz
	/Td6WFoAAATm1rRGAgAhARYAAAB0L+Wj4AX/AEldADQZSe6ODIZQ3rSQ8kAJ
	SnMPTX+XWGKW3Yu/Rwqg4Ik5wqgQKgVH97J8yA8IvZ4ahaCQogUNHRkXibr2
	Q615wcb2G7fJU49AhWAAAAAAUA8gu9DyXfAAAWWADAAAAB5FXGCxxGf7AgAA
	AAAEWVo=
	====
	"
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	# On extract, everything up to and including last ".." component is stripped
	optional FEATURE_TAR_CREATE
	testing "tar strips /../ on extract" "\
	rm -rf input_* test.tar 2>/dev/null
	mkdir input_dir
	echo Ok >input_dir/file
	tar cf test.tar ./../tar.tempdir/input_dir/../input_dir 2>&1
	rm -rf input_* 2>/dev/null
	tar -vxf test.tar 2>&1
	cat input_dir/file 2>&1
	" "\
	tar: removing leading './../tar.tempdir/input_dir/../' from member names
	input_dir/
	input_dir/file
	Ok
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	# attack.tar.bz2 has symlink pointing to a system file
	# followed by a regular file with the same name
	# containing "root::0:0::/root:/bin/sh":
	# lrwxrwxrwx root/root passwd -> /tmp/passwd
	# -rw-r--r-- root/root passwd
	# naive tar implementation may end up creating the symlink
	# and then writing into it.
	# The correct implementation unlinks target before
	# creating the second file.
	# We test that /tmp/passwd remains empty:
	optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_BZ2
	testing "tar does not extract into symlinks" "\
	>>/tmp/passwd && uudecode -o input && tar xf input 2>&1 && rm passwd; cat /tmp/passwd; echo \$?
	" "\
	tar: can't create symlink 'passwd' to '/tmp/passwd'
	0
	" \
	"" "\
	begin-base64 644 attack.tar.bz2
	QlpoOTFBWSZTWRVn/bIAAKt7hMqwAEBAAP2QAhB0Y96AAACACCAAlISgpqe0
	po0DIaDynqAkpDRP1ANAhiYNSPR8VchKhAz0AK59+DA6FcMKBggOARIJdVHL
	DGllrjs20ATUgR1HmccBX3EhoMnpMJaNyggmxgLDMz54lBnBTJO/1L1lbMS4
	l4/V8LDoe90yiWJhOJvIypgEfxdyRThQkBVn/bI=
	====
	"
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	# And same with -k
	optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_BZ2
	testing "tar -k does not extract into symlinks" "\
	>>/tmp/passwd && uudecode -o input && tar xf input -k 2>&1 && rm passwd; cat /tmp/passwd; echo \$?
	" "\
	tar: can't create symlink 'passwd' to '/tmp/passwd'
	0
	" \
	"" "\
	begin-base64 644 attack.tar.bz2
	QlpoOTFBWSZTWRVn/bIAAKt7hMqwAEBAAP2QAhB0Y96AAACACCAAlISgpqe0
	po0DIaDynqAkpDRP1ANAhiYNSPR8VchKhAz0AK59+DA6FcMKBggOARIJdVHL
	DGllrjs20ATUgR1HmccBX3EhoMnpMJaNyggmxgLDMz54lBnBTJO/1L1lbMS4
	l4/V8LDoe90yiWJhOJvIypgEfxdyRThQkBVn/bI=
	====
	"
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	optional UNICODE_SUPPORT FEATURE_TAR_GNU_EXTENSIONS FEATURE_SEAMLESS_BZ2 FEATURE_TAR_AUTODETECT
	testing "Pax-encoded UTF8 names and symlinks" '\
	tar xvf ../tar.utf8.tar.bz2 2>&1; echo $?
	export LANG=en_US.UTF-8
	ls -l etc/ssl/certs/* \| sed "s:.*etc/:etc/:" \| sort
	unset LANG
	rm -rf etc usr
	' "\
	etc/ssl/certs/3b2716e5.0
	etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem
	etc/ssl/certs/f80cc7f6.0
	usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt
	0
	etc/ssl/certs/3b2716e5.0 -> EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem
	etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem -> /usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt
	etc/ssl/certs/f80cc7f6.0 -> EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	optional FEATURE_SEAMLESS_BZ2 FEATURE_TAR_AUTODETECT LS
	testing "Symlink attack: create symlink and then write through it" '\
	exec 2>&1
	uudecode -o input && tar xvf input; echo $?
	ls /tmp/bb_test_evilfile
	ls bb_test_evilfile
	ls symlink/bb_test_evilfile
	' "\
	anything.txt
	symlink
	symlink/bb_test_evilfile
	tar: can't create symlink 'symlink' to '/tmp'
	1
	ls: /tmp/bb_test_evilfile: No such file or directory
	ls: bb_test_evilfile: No such file or directory
	symlink/bb_test_evilfile
	" \
	"" "\
	begin-base64 644 tar_symlink_attack.tar.bz2
	QlpoOTFBWSZTWZgs7bQAALT/hMmQAFBAAf+AEMAGJPPv32AAAIAIMAC5thlR
	omAjAmCMADQT1BqNE0AEwAAjAEwElTKeo9NTR6h6gaeoA0DQNLVdwZZ5iNTk
	AQwCAV6S00QFJYhrlfFkVCEDEGtgNVqYrI0uK3ggnt30gqk4e1TTQm5QIAKa
	SJqzRGSFLMmOloHSAcvLiFxxRiQtQZF+qPxbo173ZDISOAoNoPN4PQPhBhKS
	n8fYaKlioCTzL2oXYczyUUIP4u5IpwoSEwWdtoA=
	====
	"
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	mkdir tar.tempdir && cd tar.tempdir \|\| exit 1
	optional FEATURE_TAR_CREATE
	testing "Symlinks and hardlinks coexist" '\
	mkdir dir
	>dir/a
	ln -s ../dir/a dir/b
	ln dir/b dir/c
	mkdir new
	tar cf - dir/* \| tar -C new -xvf - 2>&1
	' "\
	dir/a
	dir/b
	dir/c
	" \
	"" ""
	SKIP=
	cd .. \|\| exit 1; rm -rf tar.tempdir 2>/dev/null

	exit $FAILCOUNT