libisoburn/releng/test_hardlinks

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#!/bin/bash
# ts 2011.06.27
# Test the correct handling of hardlinks by xorriso options
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# -update_r , -hardlinks perform_update , and -extract
export prog=$(basename "$0")
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export xorriso=xorriso
export image_file=/tmp/xorriso_hardlinks.iso
export on_disk=/tmp/xorriso_hardlinks_test_dir
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export in_iso=""
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export copy_on_disk=/tmp/xorriso_hardlinks_copy_dir
export keep=0
export failure=0
export next_is_xorriso=0
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export next_is_rc=0
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export bad=0
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config_by_var() {
# This is called once before option interpretation, and once for each
# option -rc.
# Variables get set to empty content to keep them from being applied
# more than once and thus overriding settings of higher precedence.
# >>> The short names are not good.
# >>> Environment variables should have a common prefix. Like RELENG_
# >>> In general, the names should be a bit more expressive.
# >>> Like RELENG_XORRISO
test -n "$XOR" && xorriso="$XOR" && XOR=
test -n "$RELENG_XORRISO" && xorriso="$RELENG_XORRISO" && RELENG_XORRISO=
test -n "$IMG" && image_file="$IMG" && IMG=
test -n "$RELENG_TMPIMAGE" && image_file="$RELENG_TMPIMAGE" \
&& RELENG_TMPIMAGE=
# This is not $DIR, which would exist before and after the test,
# but a temporary directory which may not exist before.
test -n "$RELENG_TMPDIR" && on_disk="$RELENG_TMPDIR" && RELENG_TMPDIR=
test -n "$RELENG_ISODIR" && in_iso="$RELENG_ISODIR" && RELENG_ISODIR=
test -n "$RELENG_TMPCOPYDIR" && copy_on_disk="$RELENG_TMPCOPYDIR" \
&& RELENG_TMPCOPYDIR=
}
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clean_up() {
if test "$keep" = 1
then
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echo "=== Kept test area because of option -keep" >&2
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echo "$on_disk" "$copy_on_disk" "$image_file" >&2
else
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echo "=== Removing test area" >&2
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rm -r "$on_disk" "$copy_on_disk" "$image_file"
fi
}
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# Setup
# Interpret a default configuration file here, if the test has one.
# This one has none.
# >>> Best would be if the configuration file would not override env variables.
# Process env variables and default configfile variables together
config_by_var
# Now interpret program arguments and possibly given config files
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for i in "$@"
do
if test "$next_is_xorriso" = 1
then
xorriso="$i"
next_is_xorriso=0
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elif test "$next_is_rc" = 1
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then
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# >>> This looks darn dangerous. We need a trustworthy config interpreter.
# >>> http://www.netjeff.com/humor/item.cgi?file=ShootInFoot-OS
. "$i"
config_by_var
next_is_rc=0
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elif test x"$i" = x"-rc"
then
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next_is_rc=1
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elif test x"$i" = x"-keep"
then
keep=1
elif test x"$i" = x"-clean_up"
then
keep=0
clean_up
exit 0
elif test x"$i" = x"-xorriso"
then
next_is_xorriso=1
else
echo "Usage: $0 [-rc FILE] [-keep] [-clean_up] [-xorriso PATH]" >&2
exit 2
fi
done
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test -z "$in_iso" && in_iso="$on_disk"
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if test -e "$image_file"
then
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echo "=== TEST ENVIRONMENT ERROR: $prog : Existing image_file target:" >&2
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ls -ld "$image_file" >&2
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bad=1
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fi
if test -e "$on_disk"
then
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echo "=== TEST ENVIRONMENT ERROR: $prog : Existing on_disk target:" >&2
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ls -ld "$on_disk" >&2
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bad=1
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fi
if test -e "$copy_on_disk"
then
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echo "=== TEST ENVIRONMENT ERROR: $prog : Existing copy_on_disk target:" >&2
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ls -ld "$copy_on_disk" >&2
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bad=1
fi
if test "$bad" = 1
then
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exit 1
fi
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echo "=== Setting up $on_disk with several hardlinks" >&2
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mkdir "$on_disk" || exit 1
echo test_content >"$on_disk"/file_1 || exit 1
echo test_content >"$on_disk"/file_2 || exit 1
ln "$on_disk"/file_1 "$on_disk"/file_1_link_a || exit 1
ln "$on_disk"/file_1 "$on_disk"/file_1_link_b || exit 1
ln "$on_disk"/file_2 "$on_disk"/file_2_link_a || exit 1
ls -l "$on_disk"/*
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echo "=== Producing simple image" >&2
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"$xorriso" \
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-version \
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-for_backup \
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-padding 0 \
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-outdev "$image_file" \
-update_r "$on_disk" "$in_iso" \
-hardlinks perform_update
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echo "=== Copying from image to temporary disk tree" >&2
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"$xorriso" \
-for_backup \
-indev "$image_file" \
-osirrox on \
-find "$in_iso" -exec lsdl -- \
-extract "$in_iso" "$copy_on_disk"
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## For testing the test: Let it fail deliberately
## rm "$copy_on_disk"/file_1_link_b
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echo "=== Comparing original disk tree and temporary one" >&2
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diff -r "$on_disk" "$copy_on_disk"
if test "$?" -ne 0
then
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echo "=== WRONG: diff -r $on_disk $copy_on_disk reports differences" >&2
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failure=1
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else
echo "=== OK" >&2
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fi
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echo "=== Checking for hardlinks being siblings" >&2
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ls -l "$copy_on_disk"/*
x=$(echo $(ls -l "$copy_on_disk"/* | awk '{print $2}'))
expected="3 3 3 2 2"
if test x"$x" = x"$expected"
then
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echo "=== OK" >&2
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else
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echo "=== WRONG: Link count of extracted files is not as expected." >&2
echo "=== Expected: $expected" >&2
echo "=== Got : $x" >&2
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failure=1
fi
clean_up
# Report result
echo
if test "$failure" = 1
then
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echo "======== $prog :" 'FAILED'
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else
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echo "======== $prog :" "Passed"
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fi
echo