Harden Panama doctor probes

tests/quickshell/fixtures/doctor/bin/busctl

@@ -5,6 +5,10 @@ set -euo pipefail
 if [[ "${PANAMA_DOCTOR_FIXTURE_BUS:-ready}" == "missing" ]]; then
     exit 1
 fi
+if [[ "${PANAMA_DOCTOR_FIXTURE_BUS:-ready}" == "invalid-utf8" ]]; then
+    printf '\377\n'
+    exit 0
+fi
 printf '%s\n' \
     'org.freedesktop.portal.Desktop 1000 portal' \
     'org.kde.kdeconnect 1000 kdeconnect' \

tests/quickshell/fixtures/doctor/bin/pgrep

@@ -5,6 +5,7 @@ set -euo pipefail
 name="${!#}"
 case ",${PANAMA_DOCTOR_FIXTURE_PROCESSES:-}," in
     *",$name:duplicate,"*) printf '4101\n4102\n' ;;
+    *",$name:malformed,"*) printf 'not-a-pid\n' ;;
     *",$name:missing,"*) exit 1 ;;
     *) printf '4101\n' ;;
 esac

tests/quickshell/fixtures/doctor/bin/systemctl

@@ -2,6 +2,10 @@
 
 set -euo pipefail
 
+if [[ -n ${PANAMA_DOCTOR_FIXTURE_PROBE_SECRET+x} ]]; then
+    exit 97
+fi
+
 service="${4:-}"
 case ",${PANAMA_DOCTOR_FIXTURE_STOPPED:-}," in
     *",$service,"*) exit 3 ;;

tests/quickshell/fixtures/doctor/bin/systemd-inhibit

@@ -7,4 +7,7 @@ printf 'Panama %s fixture-user 4101 systemd-inhibit sleep:idle Caffeine block\n'
 if [[ "${PANAMA_DOCTOR_FIXTURE_CAFFEINE:-single}" == "duplicate" ]]; then
     printf 'Panama %s fixture-user 4102 systemd-inhibit sleep:idle Caffeine block\n' "$uid"
 fi
+if [[ "${PANAMA_DOCTOR_FIXTURE_CAFFEINE:-single}" == "malformed" ]]; then
+    printf 'Panama %s fixture-user invalid Caffeine\n' "$uid"
+fi
 printf 'Other %s fixture-secret-token AA:BB:CC:DD:EE:FF fixture clipboard body ignore ignore\n' "$uid"