ci(TEST-62-CPIO): add CPIO test

Provides some coverage for the skipcpio and padcpio binaries.

Signed-off-by: David Disseldorp <ddiss@suse.de>

Author: ddiss

test/TEST-62-CPIO/Makefile

@@ -0,0 +1 @@
+-include ../Makefile.testdir

test/TEST-62-CPIO/test.sh

@@ -0,0 +1,163 @@
+#!/bin/bash
+# This file is part of dracut.
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+TEST_DESCRIPTION="test skipcpio and padcpio utilities"
+
+test_check() {
+    which cpio dd truncate find sort diff &>/dev/null
+}
+
+skipcpio_simple() {
+    mkdir -p "$CPIO_TESTDIR/skipcpio_simple/first_archive"
+    pushd "$CPIO_TESTDIR/skipcpio_simple/first_archive"
+
+    for ((i=0; i < 3; i++)); do
+        echo "first archive file $i" >> ./$i
+    done
+    find . -print0 | sort -z \
+        | cpio -o --null -H newc --file "$CPIO_TESTDIR/skipcpio_simple.cpio"
+    popd
+
+    mkdir -p "$CPIO_TESTDIR/skipcpio_simple/second_archive"
+    pushd "$CPIO_TESTDIR/skipcpio_simple/second_archive"
+
+    for ((i=10; i < 13; i++)); do
+        echo "second archive file $i" >> ./$i
+    done
+    # could also use the new cpio --chain option here...
+    find . -print0 | sort -z \
+        | cpio -o --null -H newc >> "$CPIO_TESTDIR/skipcpio_simple.cpio"
+    popd
+
+    cat "$CPIO_TESTDIR/skipcpio_simple.cpio" | cpio -i --list \
+        > "$CPIO_TESTDIR/skipcpio_simple.list"
+    cat <<EOF | diff - "$CPIO_TESTDIR/skipcpio_simple.list"
+.
+0
+1
+2
+EOF
+
+    $basedir/skipcpio/skipcpio "$CPIO_TESTDIR/skipcpio_simple.cpio" \
+        | cpio -i --list > "$CPIO_TESTDIR/skipcpio_simple.list"
+    cat <<EOF | diff - "$CPIO_TESTDIR/skipcpio_simple.list"
+.
+10
+11
+12
+EOF
+}
+
+# simple test with three filled files, all data segments should be aligned
+padcpio_simple() {
+    local f1_content="This data will be aligned at 4K"
+    local f2_content="This data will be aligned at 8K"
+    local f3_content="This data will be aligned at 16K"
+
+    mkdir -p "$CPIO_TESTDIR/padcpio_simple"
+    echo "$f1_content" > "$CPIO_TESTDIR/padcpio_simple/f1"
+    echo "$f2_content" > "$CPIO_TESTDIR/padcpio_simple/f2"
+    truncate --size 6K "$CPIO_TESTDIR/padcpio_simple/f2"
+    echo "$f3_content" > "$CPIO_TESTDIR/padcpio_simple/f3"
+
+    pushd "$CPIO_TESTDIR/padcpio_simple"
+    echo -n -e "f1\0f2\0f3\0" \
+        | $basedir/skipcpio/padcpio --align 4096 --paddir pad \
+        | cpio -o --null -H newc --file "$CPIO_TESTDIR/padcpio_simple.cpio"
+    popd
+
+    dd status=none bs=1 skip=4096 count="${#f1_content}" \
+       if="$CPIO_TESTDIR/padcpio_simple.cpio" | grep "$f1_content"
+    dd status=none bs=1 skip=8192 count="${#f2_content}" \
+       if="$CPIO_TESTDIR/padcpio_simple.cpio" | grep "$f2_content"
+    dd status=none bs=1 skip=16384 count="${#f3_content}" \
+       if="$CPIO_TESTDIR/padcpio_simple.cpio"  | grep "$f3_content"
+    cpio -i --list --file "$CPIO_TESTDIR/padcpio_simple.cpio" \
+        > "$CPIO_TESTDIR/padcpio_simple.list"
+    cat <<EOF | diff - "$CPIO_TESTDIR/padcpio_simple.list"
+pad
+pad/0
+f1
+pad/1
+f2
+pad/2
+f3
+EOF
+}
+
+# three files only one above --min threshold, 4k alignment
+padcpio_min() {
+    local f1_content="THIS data will be unaligned"
+    local f2_content="this data will be unaligned"
+    local f3_content="This data will be aligned at 4K"
+
+    mkdir -p "$CPIO_TESTDIR/padcpio_min"
+    echo "$f1_content" > "$CPIO_TESTDIR/padcpio_min/f1"
+    echo "$f2_content" > "$CPIO_TESTDIR/padcpio_min/f2"
+    echo "$f3_content" > "$CPIO_TESTDIR/padcpio_min/f3"
+    truncate --size 4K "$CPIO_TESTDIR/padcpio_min/f3"
+
+    pushd "$CPIO_TESTDIR/padcpio_min"
+    find . -print0 | sort -z \
+        | $basedir/skipcpio/padcpio --min 4K --align 4K --paddir pad \
+        | cpio -o --null -H newc --file "$CPIO_TESTDIR/padcpio_min.cpio"
+    popd
+
+    dd status=none bs=1 skip=4096 count="${#f3_content}" \
+       if="$CPIO_TESTDIR/padcpio_min.cpio" | grep "$f3_content"
+}
+
+# GNU cpio defers hardlink processing until the last link is encountered. To
+# avoid this tracking padcpio just puts them (unaligned) at the end of the
+# archive.
+padcpio_links() {
+    mkdir -p "$CPIO_TESTDIR/padcpio_links"
+    echo "this is hardlinked" > "$CPIO_TESTDIR/padcpio_links/f1"
+    ln "$CPIO_TESTDIR/padcpio_links/f1" "$CPIO_TESTDIR/padcpio_links/f2"
+    echo "this is a symlink target" > "$CPIO_TESTDIR/padcpio_links/f3"
+    truncate --size 6K "$CPIO_TESTDIR/padcpio_links/f3"
+    ln -s "f3" "$CPIO_TESTDIR/padcpio_links/f4"
+
+    pushd "$CPIO_TESTDIR/padcpio_links"
+    echo -n -e "f1\0f2\0f3\0f4\0" \
+        | $basedir/skipcpio/padcpio --align 4096 --paddir paddy \
+        | cpio -o --null -H newc --file "$CPIO_TESTDIR/padcpio_links.cpio"
+    popd
+
+    cpio -i --list --file "$CPIO_TESTDIR/padcpio_links.cpio" \
+        > "$CPIO_TESTDIR/padcpio_links.list"
+    cat <<EOF | diff - "$CPIO_TESTDIR/padcpio_links.list"
+paddy
+paddy/0
+f3
+f4
+f1
+f2
+EOF
+}
+
+test_run() {
+    set -x
+    set -e
+
+    skipcpio_simple
+
+    padcpio_simple
+    padcpio_min
+    padcpio_links
+
+    return 0
+}
+
+test_setup() {
+    export CPIO_TESTDIR=$(mktemp --directory -p "$TESTDIR" cpio-test.XXXXXXXXXX)
+    return 0
+}
+
+test_cleanup() {
+    [ -d "$CPIO_TESTDIR" ] && rm -rf "$CPIO_TESTDIR"
+    return 0
+}
+
+. $testdir/test-functions