test-engine: fix access to unit load path

Also add a bit of debugging output to help diagnose problems,
add missing units, and simplify cppflags.

Move test-engine to normal tests from manual tests, it should now
work without destroying the system.

4 files changed, 60 insertions, 35 deletions

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index cd6796383b..db8b4d7705 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -832,7 +832,6 @@ pid_t unit_search_main_pid(Unit *u) {
 
 int manager_setup_cgroup(Manager *m) {
         _cleanup_free_ char *path = NULL;
-        char *e;
         int r;
 
         assert(m);
@@ -851,6 +850,8 @@ int manager_setup_cgroup(Manager *m) {
          * off. This is to support live upgrades from older systemd
          * versions where PID 1 was moved there. */
         if (m->running_as == SYSTEMD_SYSTEM) {
+                char *e;
+
                 e = endswith(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE);
                 if (!e)
                         e = endswith(m->cgroup_root, "/system");
@@ -872,40 +873,42 @@ int manager_setup_cgroup(Manager *m) {
         }
 
         log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER ". File system hierarchy is at %s.", path);
+        if (!m->test_run) {
 
-        /* 3. Install agent */
-        if (m->running_as == SYSTEMD_SYSTEM) {
-                r = cg_install_release_agent(SYSTEMD_CGROUP_CONTROLLER, SYSTEMD_CGROUP_AGENT_PATH);
-                if (r < 0)
-                        log_warning("Failed to install release agent, ignoring: %s", strerror(-r));
-                else if (r > 0)
-                        log_debug("Installed release agent.");
-                else
-                        log_debug("Release agent already installed.");
-        }
+                /* 3. Install agent */
+                if (m->running_as == SYSTEMD_SYSTEM) {
+                        r = cg_install_release_agent(SYSTEMD_CGROUP_CONTROLLER, SYSTEMD_CGROUP_AGENT_PATH);
+                        if (r < 0)
+                                log_warning("Failed to install release agent, ignoring: %s", strerror(-r));
+                        else if (r > 0)
+                                log_debug("Installed release agent.");
+                        else
+                                log_debug("Release agent already installed.");
+                }
 
-        /* 4. Make sure we are in the root cgroup */
-        r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, 0);
-        if (r < 0) {
-                log_error("Failed to create root cgroup hierarchy: %s", strerror(-r));
-                return r;
-        }
+                /* 4. Make sure we are in the root cgroup */
+                r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, 0);
+                if (r < 0) {
+                        log_error("Failed to create root cgroup hierarchy: %s", strerror(-r));
+                        return r;
+                }
 
-        /* 5. And pin it, so that it cannot be unmounted */
-        safe_close(m->pin_cgroupfs_fd);
+                /* 5. And pin it, so that it cannot be unmounted */
+                safe_close(m->pin_cgroupfs_fd);
 
-        m->pin_cgroupfs_fd = open(path, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK);
-        if (m->pin_cgroupfs_fd < 0) {
-                log_error("Failed to open pin file: %m");
-                return -errno;
+                m->pin_cgroupfs_fd = open(path, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK);
+                if (m->pin_cgroupfs_fd < 0) {
+                        log_error("Failed to open pin file: %m");
+                        return -errno;
+                }
+
+                /* 6.  Always enable hierarchial support if it exists... */
+                cg_set_attribute("memory", "/", "memory.use_hierarchy", "1");
         }
 
-        /* 6. Figure out which controllers are supported */
+        /* 7. Figure out which controllers are supported */
         m->cgroup_supported = cg_mask_supported();
 
-        /* 7.  Always enable hierarchial support if it exists... */
-        cg_set_attribute("memory", "/", "memory.use_hierarchy", "1");
-
         return 0;
 }
 
diff --git a/src/core/main.c b/src/core/main.c
index ae38b435d9..29f97364a4 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -1473,6 +1473,9 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
+        if (arg_action == ACTION_TEST)
+                skip_setup = true;
+
         pager_open_if_enabled();
 
         if (arg_action == ACTION_HELP) {
@@ -1543,7 +1546,8 @@ int main(int argc, char *argv[]) {
         if (arg_running_as == SYSTEMD_SYSTEM) {
                 const char *virtualization = NULL;
 
-                log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
+                log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
+                         arg_action == ACTION_TEST ? "test " : "" );
 
                 detect_virtualization(&virtualization);
                 if (virtualization)
@@ -1571,7 +1575,8 @@ int main(int argc, char *argv[]) {
                 _cleanup_free_ char *t;
 
                 t = uid_to_name(getuid());
-                log_debug(PACKAGE_STRING " running in user mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")", getuid(), strna(t));
+                log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
+                          arg_action == ACTION_TEST ? " test" : "", getuid(), t);
         }
 
         if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
@@ -1636,7 +1641,7 @@ int main(int argc, char *argv[]) {
                 }
         }
 
-        r = manager_new(arg_running_as, &m);
+        r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
         if (r < 0) {
                 log_error("Failed to allocate manager object: %s", strerror(-r));
                 goto finish;
diff --git a/src/core/manager.c b/src/core/manager.c
index 9d9a713005..2e63c5ef1f 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -241,6 +241,9 @@ static int manager_setup_time_change(Manager *m) {
         assert(m);
         assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));
 
+        if (m->test_run)
+                return 0;
+
         /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever
          * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */
 
@@ -302,6 +305,9 @@ static int manager_setup_signals(Manager *m) {
 
         assert(m);
 
+        if (m->test_run)
+                return 0;
+
         /* We are not interested in SIGSTOP and friends. */
         assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 
@@ -409,7 +415,7 @@ static int manager_default_environment(Manager *m) {
         return 0;
 }
 
-int manager_new(SystemdRunningAs running_as, Manager **_m) {
+int manager_new(SystemdRunningAs running_as, bool test_run, Manager **_m) {
         Manager *m;
         int r;
 
@@ -435,6 +441,8 @@ int manager_new(SystemdRunningAs running_as, Manager **_m) {
         m->pin_cgroupfs_fd = m->notify_fd = m->signal_fd = m->time_change_fd = m->dev_autofs_fd = m->private_listen_fd = m->kdbus_fd = -1;
         m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
 
+        m->test_run = test_run;
+
         r = manager_default_environment(m);
         if (r < 0)
                 goto fail;
@@ -514,6 +522,9 @@ fail:
 static int manager_setup_notify(Manager *m) {
         int r;
 
+        if (m->test_run)
+                return 0;
+
         if (m->notify_fd < 0) {
                 _cleanup_close_ int fd = -1;
                 union {
@@ -592,12 +603,10 @@ static int manager_setup_notify(Manager *m) {
 static int manager_setup_kdbus(Manager *m) {
 #ifdef ENABLE_KDBUS
         _cleanup_free_ char *p = NULL;
-#endif
 
-#ifdef ENABLE_KDBUS
         assert(m);
 
-        if (m->kdbus_fd >= 0)
+        if (m->test_run || m->kdbus_fd >= 0)
                 return 0;
 
         m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", m->running_as == SYSTEMD_SYSTEM, &p);
@@ -624,6 +633,9 @@ static int manager_connect_bus(Manager *m, bool reexecuting) {
 
         assert(m);
 
+        if (m->test_run)
+                return 0;
+
         try_bus_connect =
                 m->kdbus_fd >= 0 ||
                 reexecuting ||
@@ -2636,6 +2648,9 @@ void manager_run_generators(Manager *m) {
 
         assert(m);
 
+        if (m->test_run)
+                return;
+
         generator_path = m->running_as == SYSTEMD_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
         d = opendir(generator_path);
         if (!d) {
diff --git a/src/core/manager.h b/src/core/manager.h
index 718c29fa0f..aa6c76fa5a 100644
--- a/src/core/manager.h
+++ b/src/core/manager.h
@@ -230,6 +230,8 @@ struct Manager {
         bool taint_usr:1;
         bool first_boot:1;
 
+        bool test_run:1;
+
         ShowStatus show_status;
         bool confirm_spawn;
         bool no_console_output;
@@ -276,7 +278,7 @@ struct Manager {
         int kdbus_fd;
 };
 
-int manager_new(SystemdRunningAs running_as, Manager **m);
+int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
 void manager_free(Manager *m);
 
 int manager_enumerate(Manager *m);