main: honour rd.systemd.unit= only in the initrd, not the host

[elogind.git] / src / core / main.c

diff --git a/src/core/main.c b/src/core/main.c
index 899233bf518f872ac364c19398c3773cb3718765..b3ee1b9b889960589c7730cccb8687a88e1609d6 100644 (file)
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -286,7 +286,8 @@ static int parse_proc_cmdline_item(const char *key, const char *value) {
 
         } else if (streq(key, "rd.systemd.unit") && value) {
 
-                return set_default_unit(value);
+                if (in_initrd())
+                        return set_default_unit(value);
 
         } else if (streq(key, "systemd.log_target") && value) {
 
@@ -1307,6 +1308,7 @@ int main(int argc, char *argv[]) {
         bool loaded_policy = false;
         bool arm_reboot_watchdog = false;
         bool queue_default_job = false;
+        bool empty_etc = false;
         char *switch_root_dir = NULL, *switch_root_init = NULL;
         static struct rlimit saved_rlimit_nofile = { 0, 0 };
 
@@ -1578,6 +1580,9 @@ int main(int argc, char *argv[]) {
                 if (in_initrd())
                         log_info("Running in initial RAM disk.");
 
+                empty_etc = dir_is_empty("/etc") > 0;
+                if (empty_etc)
+                        log_info("Running with unpopulated /etc.");
         } else {
                 _cleanup_free_ char *t = uid_to_name(getuid());
                 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
@@ -1592,7 +1597,7 @@ int main(int argc, char *argv[]) {
                 kmod_setup();
 #endif
                 hostname_setup();
-                machine_id_setup("");
+                machine_id_setup(NULL);
                 loopback_setup();
 
                 test_mtab();
@@ -1634,9 +1639,18 @@ int main(int argc, char *argv[]) {
                 }
         }
 
-        if (arg_running_as == SYSTEMD_SYSTEM)
+        if (arg_running_as == SYSTEMD_SYSTEM) {
                 bump_rlimit_nofile(&saved_rlimit_nofile);
 
+                if (empty_etc) {
+                        r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
+                        if (r < 0)
+                                log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
+                        else
+                                log_info("Populated /etc with preset unit settings.");
+                }
+        }
+
         r = manager_new(arg_running_as, &m);
         if (r < 0) {
                 log_error("Failed to allocate manager object: %s", strerror(-r));