JTMP="/var/tmp/jtmp-$RANDOM"
mkdir "$JTMP"
-( cd /test-journals/1 && for f in *.zst ; do unzstd < "$f" > "$JTMP/${f%.zst}" ; done )
+( cd /test-journals/1 && for f in *.zst; do unzstd "$f" -o "$JTMP/${f%.zst}"; done )
-journalctl --directory="$JTMP" --list-boots --output=json > /tmp/lb1
+journalctl --directory="$JTMP" --list-boots --output=json >/tmp/lb1
diff -u /tmp/lb1 - <<'EOF'
[{"index":-3,"boot_id":"5ea5fc4f82a14186b5332a788ef9435e","first_entry":1666569600994371,"last_entry":1666584266223608},{"index":-2,"boot_id":"bea6864f21ad4c9594c04a99d89948b0","first_entry":1666584266731785,"last_entry":1666584347230411},{"index":-1,"boot_id":"4c708e1fd0744336be16f3931aa861fb","first_entry":1666584348378271,"last_entry":1666584354649355},{"index":0,"boot_id":"35e8501129134edd9df5267c49f744a4","first_entry":1666584356661527,"last_entry":1666584438086856}]