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tar: prevent empty file to be treated as valid tarball

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function                                             old     new   delta
tar_main                                             879     895     +16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2013-11-19 17:17:48 +01:00
parent dd1d8ab506
commit 0545e3b69a
2 changed files with 35 additions and 3 deletions
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25
testsuite/tar.tests
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@ -15,6 +15,15 @@ mkdir tar.tempdir && cd tar.tempdir || exit 1
# 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
testing "Empty file is not a tarball.tar.gz" '\
tar xvzf - 2>&1; echo $?
@ -26,6 +35,22 @@ tar: short read
"" ""
SKIP=
testing "Two zeroed blocks is a ('truncated') empty tarball" '\
dd if=/dev/zero bs=512 count=2 2>/dev/null | strace -o /tmp/zzz -tt -s99 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=
optional FEATURE_TAR_CREATE FEATURE_LS_SORTFILES
testing "tar hardlinks and repeated files" '\
rm -rf input_* test.tar 2>/dev/null