Run tests with sudo for better coverage.

.github/run_test.sh

@@ -5,6 +5,8 @@ TARGETS=$@
 TEST_TARGET="tests"
 LTESTS=""  # all tests by default
 
+[ -z "${SUDO}" ] || ${SUDO} mkdir -p /var/empty
+
 set -ex
 
 for TARGET in $TARGETS; do

.github/workflows/c-cpp.yml

@@ -30,6 +30,7 @@ jobs:
     - name: make tests
       run: ./.github/run_test.sh ${{ matrix.configs }}
       env:
+        SUDO: sudo
         TEST_SSH_UNSAFE_PERMISSIONS: 1
 
 
@@ -62,6 +63,7 @@ jobs:
     - name: make tests
       run: ./.github/run_test.sh ${{ matrix.configs }}
       env:
+        SUDO: sudo
         TEST_SSH_UNSAFE_PERMISSIONS: 1
 
 
@@ -88,4 +90,5 @@ jobs:
     - name: make tests
       run: ./.github/run_test.sh ${{ matrix.configs }}
       env:
+        SUDO: sudo
         TEST_SSH_UNSAFE_PERMISSIONS: 1