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#!/bin/bash
set -e
[ "$(id -u)" = "0" ] ||
{ echo "sorry, must be root"; exit 1; }
PT_TYPE="${PT_TYPE:-gpt}" # dos or gpt
cleanup() {
[ ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
}
rq() {
local out="${TEMP_D}/out"
"$@" > "$out" 2>&1 || { error "FAILED [$?]:" "$@"; cat "$out"; return 1; }
}
fail() { echo "$@" 1>&2; exit 1; }
error() { echo "$@" 1>&2; }
msg() { error "$@"; }
do_pt_test() {
local img="$1" pt="$2" data="$3" info="$4" premsg="$5" out=""
msg "${premsg}testing partition $pt in $img"
mount-image-callback --cd "--part=$pt" "$img" -- \
sh -c "echo '$data' > data.txt" || {
error "${premsg}failed writing to partition $pt in $img";
return 1;
}
local ret="" expected=$(printf "%s\n%s\n" "$info" "$data")
out=$(mount-image-callback --read-only --cd "--part=$pt" "$img" -- \
sh -c '
r=0; for f in "$@"; do
cat $f || { echo "$f: cat failed rc=$?"; r=99; }; done;
exit $r' sh-extract info.txt data.txt)
ret=$?
if [ $ret -ne 0 -a $ret -ne 99 ]; then
error "${premsg}failed mounting part $pt for verification";
error "out=${out}"
return 1;
fi
[ "$expected" = "$out" ] || {
error "${premsg}"
error "== expected on $pt =="
error "$expected"
error "== found on $pt =="
error "$out"
return 1
}
}
TEMP_D=$(mktemp -d ${TMPDIR:-/tmp}/${0##*/}.XXXXXX)
trap cleanup EXIT
pt1="${TEMP_D}/pt1.img"
pt2="${TEMP_D}/pt2.img"
prept="${TEMP_D}/header.img"
postpt="${TEMP_D}/foot.img"
img_mbr="${TEMP_D}/disk-mbr.img"
img_gpt="${TEMP_D}/disk-gpt.img"
MB=$((1024*1024))
SSIZE=512
pt1_size=$((100*$MB))
pt2_size=$((200*$MB))
prept_size=$MB
postpt_size=$MB
pt1_d="${TEMP_D}/pt1"
pt2_d="${TEMP_D}/pt2"
mkdir -p "$pt1_d" "$pt2_d"
echo "partition 1" > "$pt1_d/info.txt"
echo "file 1" > "$pt1_d/file1.txt"
mkdir "$pt1_d/dev" "$pt1_d/sys" "$pt1_d/proc" "$pt1_d/mnt"
echo "partition 2" > "$pt2_d/info.txt"
## Stage 1
## Create 2 un-partitioned images, put a filesystem on them.
## And then mount them write a file, and then mount and
## read the file to verify its there.
truncate "--size=$pt1_size" "$pt1"
truncate "--size=$pt2_size" "$pt2"
rq mkfs.ext4 -F "${pt1}"
rq mkfs.ext4 -F "${pt2}"
## Stage 1.5: Verify
msg "testing partition 1 image"
mount-image-callback "$pt1" -- cp -r "$pt1_d/"* _MOUNTPOINT_ ||
fail "copying file to pt1 mount failed"
out=$(mount-image-callback --read-only "$pt1" --cd -- cat info.txt) &&
[ "$out" = "partition 1" ] ||
fail "failed verification of pt1 contents"
out=$(mount-image-callback --read-only --cd "$pt1" -- cat file1.txt)
[ "$out" = "file 1" ] ||
fail "found unexpected contents in file1.txt on pt1: $out"
msg "testing partition 2 image"
mount-image-callback "$pt2" -- cp -r "$pt2_d/"* _MOUNTPOINT_ ||
fail "copying file to pt2 mount failed"
out=$(mount-image-callback --read-only "$pt2" --cd -- cat info.txt) &&
[ "$out" = "partition 2" ] ||
fail "failed verification of pt2 contents"
## Stage 1.6: Mount with overlay
copy_out="${TEMP_D}/copy-out"
mkdir -p "$TEMP_D/copy-out"
mount-image-callback --overlay --cd "$pt1" -- \
sh -ec 't="$1";
echo hi > new-file.txt; echo xxx > file1.txt;
cp -r * "$t"' -- "$copy_out"
read found < "$copy_out/file1.txt"
[ "$found" = "xxx" ] ||
fail "unexpected contents in file1.txt from overlay: $found."
[ -f "$copy_out/new-file.txt" ] ||
fail "new file created during overlay does not exist in copy out"
read found <"$copy_out/new-file.txt"
[ "$found" = "hi" ] ||
fail "unexpected contents in new-file.txt from overlay: $found."
## verify the overlay mount changes did not change partition
out=$(mount-image-callback --cd "$pt1" -- cat file1.txt)
[ "$out" = "file 1" ] ||
fail "found unexpected contents in pt1:file1.txt after overlay: $out"
## Stage 1.7: Test --system-mounts
msg "testing --system-mounts on pt1"
mount-image-callback --read-only --system-mounts --cd -- "$pt1" sh -c '
fails=0
logfail() { fails=$(($fails+1)); echo "$@" 1>&2; }
[ -e proc/1 ] || logfail "proc/1 did not exist: proc not mounted"
[ -d sys/class ] || logfail "sys/class did not exist: sys not mounted"
[ -e dev/null ] || logfail "dev/null did not exist: dev not mounted"' ||
fail "testing system-mounts failed."
## Stage 1.8: Test unmounts of unexpected mounted dirs.
msg "testing unexpected mount get unmounted."
mount-image-callback --read-only --cd -- "$pt1" sh -ec '
fail() { echo "$@" 1>&2; }
mount -t tmpfs none -o size=10240 mnt/ || fail "failed tmpfs mount"
echo "hi mom" > mnt/file-on-tmpfs ||
fail "failed write to file-on-tmpfs"
mkdir mnt/mnt2 || faili "failed mkdir mnt/mnt2"
mount -t tmpfs none -o size=4096 mnt/mnt2 || fail "failed 2nd tmpfs mount"
echo "hi again" > mnt/mnt2/second-file-on-tmpfs' ||
fail "testing unexpected mounts failed."
# verify the file is not there.
mount-image-callback --read-only --cd -- "$pt1" sh -c '
fail() { echo "$@" 1>&2; exit 1; }
[ ! -e mnt/file-on-tmpfs ] || fail mnt/file-on-tmpfs existed
[ ! -e mnt/mnt2 ] || fail mnt/mnt2 existed
[ ! -e mnt/mnt2/second-file-on-tmpfs ] || fail second file existed
exit 0' ||
fail "file mnt/file-on-tmpfs existed."
## Stage 2
## Create a full disk image with those 2 partition images inside
## and a partition table that points to them. Do one for MBR and GPT.
truncate "--size=$prept_size" "$prept"
truncate "--size=$postpt_size" "$postpt"
msg "writing hunks to disk image ${img_mbr}"
for hunk in "$prept" "$pt1" "$pt2" "$postpt"; do
rq dd bs=1M conv=notrunc oflag=append "if=$hunk" "of=${img_mbr}" ||
fail "failed adding $hunk to disk image"
done
cp "${img_mbr}" "$img_gpt"
#
sfdisk_in="$TEMP_D/ptable_in"
curstart=0
(
echo unit: sectors
for pair in "-:${prept_size}" "1:${pt1_size}" "2:${pt2_size}" "-:${postpt_size}"; do
op=${pair%%:*}
size="${pair#*:}"
if [ "$op" != "-" ]; then
echo "${curstart} $((size/$SSIZE)) L"
fi
curstart=$(($curstart+($size/$SSIZE)))
done
) > "$sfdisk_in"
msg "partitioning MBR disk image ${img_mbr}"
(echo "label: dos"; cat "$sfdisk_in"; ) | rq sfdisk "${img_mbr}"
msg "partitioning GPT disk image ${img_gpt}"
(echo "label: gpt"; cat "$sfdisk_in"; ) | rq sfdisk "${img_gpt}"
## Stage 2.5
## Verify we can mount each partition with '--part=N'
## write data, then remount and read expected data.
for toks in "MBR:${img_mbr}" "GPT:${img_gpt}"; do
img=${toks#*:}
prefix=${toks%%:*}
do_pt_test "$img" 1 "foo1" "partition 1" "$prefix: " ||
fail "${prefix}: failed testing partition 1 on $img"
do_pt_test "$img" 2 "foo2" "partition 2" "$prefix: " ||
fail "${prefix}: failed testing partition 2 on $img"
done
error "Finished tests."
# vi: ts=4 noexpandtab
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