test: add test case for PAMName= $SHELL acquisition for root

(cherry picked from commit aadb8f978475d622ead0814db0d970f09592cb25)
(cherry picked from commit b893fb5c41d8eba1abe0279fb40a6a901acee6e3)

diff --git a/test/units/TEST-74-AUX-UTILS.run.sh b/test/units/TEST-74-AUX-UTILS.run.sh
index 107c17e35223c6734b5b0c25ea3495e8073e283b..882526f14621212b80e24e1a4b418101782fc282 100755 (executable)
--- a/test/units/TEST-74-AUX-UTILS.run.sh
+++ b/test/units/TEST-74-AUX-UTILS.run.sh
@@ -236,13 +236,19 @@ if [[ -e /usr/lib/pam.d/systemd-run0 ]] || [[ -e /etc/pam.d/systemd-run0 ]]; the
     run0 ls /
     assert_eq "$(run0 echo foo)" "foo"
     # Check if we set some expected environment variables
-    for arg in "" "--user=root" "--user=0" "--user=testuser"; do
-        assert_eq "$(run0 ${arg:+"$arg"} bash -c 'echo $SUDO_USER')" "$USER"
-        assert_eq "$(run0 ${arg:+"$arg"} bash -c 'echo $SUDO_UID')" "$(id -u "$USER")"
-        assert_eq "$(run0 ${arg:+"$arg"} bash -c 'echo $SUDO_GID')" "$(id -u "$USER")"
+    for tu in "" "root" "0" "testuser"; do
+        assert_eq "$(run0 ${tu:+"--user=$tu"} bash -c 'echo $SUDO_USER')" "$USER"
+        assert_eq "$(run0 ${tu:+"--user=$tu"} bash -c 'echo $SUDO_UID')" "$(id -u "$USER")"
+        assert_eq "$(run0 ${tu:+"--user=$tu"} bash -c 'echo $SUDO_GID')" "$(id -u "$USER")"
 
         # Validate that we actually went properly through PAM (XDG_SESSION_TYPE is set by pam_systemd)
-        assert_eq "$(run0 ${arg:+"$arg"} bash -c 'echo $XDG_SESSION_TYPE')" "unspecified"
+        assert_eq "$(run0 ${tu:+"--user=$tu"} bash -c 'echo $XDG_SESSION_TYPE')" "unspecified"
+
+        if [[ -n "$tu" ]]; then
+            # Validate that $SHELL is set to login shell of target user when cmdline is supplied (not invoking shell)
+            TARGET_LOGIN_SHELL="$(getent passwd "$tu" | cut -d: -f7)"
+            assert_eq "$(run0 --user="$tu" printenv SHELL)" "$TARGET_LOGIN_SHELL"
+        fi
     done
     # Let's chain a couple of run0 calls together, for fun
     readarray -t cmdline < <(printf "%.0srun0\n" {0..31})