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8fecea5296
there is a file system type that doesn't support sparse files, yet for which metadata takes up additional space.
73 lines
2.1 KiB
Bash
Executable File
73 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that du does not rely on narrow types like size_t for
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# file sizes or sums.
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if test "$VERBOSE" = yes; then
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set -x
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du --version
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fi
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. $srcdir/../envvar-check
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pwd=`pwd`
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t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
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trap 'status=$?; cd $pwd; chmod -R u+rwx $t0; rm -rf $t0 && exit $status' 0
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trap '(exit $?); exit $?' 1 2 13 15
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framework_failure=0
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mkdir -p $tmp || framework_failure=1
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cd $tmp || framework_failure=1
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if test $framework_failure = 1; then
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echo "$0: failure in testing framework" 1>&2
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(exit 1); exit 1
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fi
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# If this file system doesn't support sparse files,
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# don't try to create a file that'd end up consuming 8GB.
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# This happens on Darwin6.5 with a file system of type `hfs'.
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# NTFS requires 128K before a hole appears in a sparse file.
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dd bs=1 seek=128K of=t < /dev/null 2> /dev/null
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set x `du -sk t`
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if test "$2" -ge 128; then
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echo "$0: skipping this test, since this file system doesn't support" 1>&2
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echo "$0: sparse files and this test requires a file with an apparent" 1>&2
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echo "$0: size of 8GB" 1>&2
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(exit 77); exit 77
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fi
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dd bs=1 seek=8G of=big < /dev/null 2> /dev/null
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if test $? != 0; then
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echo "$0: cannot create a file large enough for this test; possibly" 1>&2
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echo "$0: because file offsets are only 32 bits on this file system" 1>&2
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(exit 77); exit 77
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fi
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# FIXME: this should be a test of dd.
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# On some systems (at least linux-2.4.18 + NFS to disks on a Solaris system)
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# the `dd' command above mistakenly creates a file of length `0', yet
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# doesn't fail. The root of that failure is that the ftruncate call
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# returns zero but doesn't do its job. Detect this failure.
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set x `ls -gG big`
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size=$4
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if test "$size" = 0; then
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echo "$0: cannot create a file large enough for this test;" 1>&2
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echo "$0: possibly because this system's NFS support is buggy;" 1>&2
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echo "$0: Consider rerunning this test on a different file system." 1>&2
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(exit 77); exit 77
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fi
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fail=0
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# This would print `0 big' with coreutils-4.5.8.
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du -ab big > out || fail=1
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cat <<\EOF > exp
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8589934592 big
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EOF
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cmp out exp || fail=1
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test $fail = 1 && diff out exp 2> /dev/null
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(exit $fail); exit $fail
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