test: check for bin/bash in dissect --mtree instead of cat

Ubuntu is doing shenanigans with their coreutils so they are now
symlinks instead of binaries, so the grep fails. Check bash instead
to fix test failure on 26.04.

diff --git a/test/units/TEST-50-DISSECT.dissect.sh b/test/units/TEST-50-DISSECT.dissect.sh
index d82f8c40fdc12dbe320736a102e2568d91336cf0..8cc07df3b967eac839d82471c9b227be87b745f0 100755 (executable)
--- a/test/units/TEST-50-DISSECT.dissect.sh
+++ b/test/units/TEST-50-DISSECT.dissect.sh
@@ -25,9 +25,9 @@ systemd-dissect "$MINIMAL_IMAGE.raw" | grep -F -f <(sed 's/"//g' "$OS_RELEASE")
 
 systemd-dissect --list "$MINIMAL_IMAGE.raw" | grep '^etc/os-release$' >/dev/null
 systemd-dissect --mtree "$MINIMAL_IMAGE.raw" --mtree-hash yes | \
-    grep -E "^.(/usr|)/bin/cat type=file mode=0755 uid=0 gid=0 size=[0-9]* sha256sum=[a-z0-9]*$" >/dev/null
+    grep -E "^.(/usr|)/bin/bash type=file mode=0755 uid=0 gid=0 size=[0-9]* sha256sum=[a-z0-9]*$" >/dev/null
 systemd-dissect --mtree "$MINIMAL_IMAGE.raw" --mtree-hash no  | \
-    grep -E "^.(/usr|)/bin/cat type=file mode=0755 uid=0 gid=0 size=[0-9]*$" >/dev/null
+    grep -E "^.(/usr|)/bin/bash type=file mode=0755 uid=0 gid=0 size=[0-9]*$" >/dev/null
 
 read -r SHA256SUM1 _ < <(systemd-dissect --copy-from "$MINIMAL_IMAGE.raw" etc/os-release | sha256sum)
 test "$SHA256SUM1" != ""