chiark / gitweb /
remount-fs: also remount /usr according to fstab
[elogind.git] / src / core / dbus-manager.c
index 770fce12099e7a7808801553a629892da26a2bd0..f8a54000552476fad60d3cbbec71854765069ea6 100644 (file)
@@ -31,6 +31,8 @@
 #include "dbus-common.h"
 #include "install.h"
 #include "watchdog.h"
+#include "hwclock.h"
+#include "path-util.h"
 
 #define BUS_MANAGER_INTERFACE_BEGIN                                     \
         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"
         "  </method>\n"                                                 \
         "  <method name=\"Subscribe\"/>\n"                              \
         "  <method name=\"Unsubscribe\"/>\n"                            \
-        "  <method name=\"Dump\"/>\n"                                   \
+        "  <method name=\"Dump\">\n"                                    \
+        "   <arg name=\"dump\" type=\"s\" direction=\"out\"/>\n"        \
+        "  </method>\n"                                                 \
         "  <method name=\"CreateSnapshot\">\n"                          \
         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
         "   <arg name=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
         "  <method name=\"PowerOff\"/>\n"                               \
         "  <method name=\"Halt\"/>\n"                                   \
         "  <method name=\"KExec\"/>\n"                                  \
+        "  <method name=\"SwitchRoot\">\n"                              \
+        "   <arg name=\"new_root\" type=\"s\" direction=\"in\"/>\n"     \
+        "   <arg name=\"init\" type=\"s\" direction=\"in\"/>\n"         \
+        "  </method>\n"                                                 \
         "  <method name=\"SetEnvironment\">\n"                          \
         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
         "  </method>\n"                                                 \
         "  <signal name=\"JobNew\">\n"                                  \
         "   <arg name=\"id\" type=\"u\"/>\n"                            \
         "   <arg name=\"job\" type=\"o\"/>\n"                           \
+        "   <arg name=\"unit\" type=\"s\"/>\n"                          \
         "  </signal>\n"                                                 \
         "  <signal name=\"JobRemoved\">\n"                              \
         "   <arg name=\"id\" type=\"u\"/>\n"                            \
         "   <arg name=\"job\" type=\"o\"/>\n"                           \
+        "   <arg name=\"unit\" type=\"s\"/>\n"                          \
         "   <arg name=\"result\" type=\"s\"/>\n"                        \
         "  </signal>"                                                   \
         "  <signal name=\"StartupFinished\">\n"                         \
         "  <property name=\"Distribution\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"Features\" type=\"s\" access=\"read\"/>\n"  \
         "  <property name=\"Tainted\" type=\"s\" access=\"read\"/>\n"   \
-        "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"InitRDTimestamp\" type=\"t\" access=\"read\"/>\n" \
         "  <property name=\"InitRDTimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
-        "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"DefaultControllers\" type=\"as\" access=\"read\"/>\n" \
         "  <property name=\"DefaultStandardOutput\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"DefaultStandardError\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"RuntimeWatchdogUSec\" type=\"s\" access=\"readwrite\"/>\n" \
-        "  <property name=\"ShutdownWatchdogUSec\" type=\"s\" access=\"readwrite\"/>\n" \
-        "  <property name=\"HaveWatchdog\" type=\"b\" access=\"read\"/>\n"
-
-#ifdef HAVE_SYSV_COMPAT
-#define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
-        "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
-        "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
-        "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n"
-#else
-#define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV
-#endif
+        "  <property name=\"ShutdownWatchdogUSec\" type=\"s\" access=\"readwrite\"/>\n"
 
 #define BUS_MANAGER_INTERFACE_END                                       \
         " </interface>\n"
         BUS_MANAGER_INTERFACE_METHODS                                   \
         BUS_MANAGER_INTERFACE_SIGNALS                                   \
         BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
-        BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
         BUS_MANAGER_INTERFACE_END
 
 #define INTROSPECTION_BEGIN                                             \
 
 const char bus_manager_interface[] _introspect_("Manager") = BUS_MANAGER_INTERFACE;
 
-static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_exec_output, exec_output, ExecOutput);
 
 static int bus_manager_append_tainted(DBusMessageIter *i, const char *property, void *data) {
@@ -294,17 +290,24 @@ static int bus_manager_append_tainted(DBusMessageIter *i, const char *property,
         assert(m);
 
         if (m->taint_usr)
-                e = stpcpy(e, "usr-separate-fs ");
+                e = stpcpy(e, "split-usr:");
 
         if (readlink_malloc("/etc/mtab", &p) < 0)
-                e = stpcpy(e, "etc-mtab-not-symlink ");
+                e = stpcpy(e, "mtab-not-symlink:");
         else
                 free(p);
 
         if (access("/proc/cgroups", F_OK) < 0)
-                stpcpy(e, "cgroups-missing ");
+                e = stpcpy(e, "cgroups-missing:");
+
+        if (hwclock_is_localtime() > 0)
+                e = stpcpy(e, "local-hwclock:");
+
+        /* remove the last ':' */
+        if (e != buf)
+                e[-1] = 0;
 
-        t = strstrip(buf);
+        t = buf;
 
         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
                 return -ENOMEM;
@@ -493,20 +496,6 @@ static int bus_manager_send_unit_files_changed(Manager *m) {
         return r;
 }
 
-static int bus_manager_append_have_watchdog(DBusMessageIter *i, const char *property, void *data) {
-        dbus_bool_t b;
-
-        assert(i);
-        assert(property);
-
-        b = access("/dev/watchdog", F_OK) >= 0;
-
-        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
-                return -ENOMEM;
-
-        return 0;
-}
-
 static int bus_manager_set_runtime_watchdog_usec(DBusMessageIter *i, const char *property, void *data) {
         uint64_t *t = data;
 
@@ -531,7 +520,6 @@ static const BusProperty bus_systemd_properties[] = {
 };
 
 static const BusProperty bus_manager_properties[] = {
-        { "RunningAs",     bus_manager_append_running_as,          "s", offsetof(Manager, running_as)                  },
         { "Tainted",       bus_manager_append_tainted,             "s", 0                                              },
         { "InitRDTimestamp", bus_property_append_uint64,           "t", offsetof(Manager, initrd_timestamp.realtime)   },
         { "InitRDTimestampMonotonic", bus_property_append_uint64,  "t", offsetof(Manager, initrd_timestamp.monotonic)  },
@@ -550,19 +538,12 @@ static const BusProperty bus_manager_properties[] = {
         { "ConfirmSpawn",  bus_property_append_bool,               "b", offsetof(Manager, confirm_spawn)               },
         { "ShowStatus",    bus_property_append_bool,               "b", offsetof(Manager, show_status)                 },
         { "UnitPath",      bus_property_append_strv,              "as", offsetof(Manager, lookup_paths.unit_path),     true },
-        { "NotifySocket",  bus_property_append_string,             "s", offsetof(Manager, notify_socket),              true },
         { "ControlGroupHierarchy", bus_property_append_string,     "s", offsetof(Manager, cgroup_hierarchy),           true },
         { "DefaultControllers", bus_property_append_strv,         "as", offsetof(Manager, default_controllers),        true },
         { "DefaultStandardOutput", bus_manager_append_exec_output, "s", offsetof(Manager, default_std_output)          },
         { "DefaultStandardError",  bus_manager_append_exec_output, "s", offsetof(Manager, default_std_error)           },
         { "RuntimeWatchdogUSec", bus_property_append_usec,         "t", offsetof(Manager, runtime_watchdog),           false, bus_manager_set_runtime_watchdog_usec },
         { "ShutdownWatchdogUSec", bus_property_append_usec,        "t", offsetof(Manager, shutdown_watchdog),          false, bus_property_set_usec },
-        { "HaveWatchdog",  bus_manager_append_have_watchdog,       "b", 0                                              },
-#ifdef HAVE_SYSV_COMPAT
-        { "SysVConsole",   bus_property_append_bool,               "b", offsetof(Manager, sysv_console)                },
-        { "SysVInitPath",  bus_property_append_strv,              "as", offsetof(Manager, lookup_paths.sysvinit_path), true },
-        { "SysVRcndPath",  bus_property_append_strv,              "as", offsetof(Manager, lookup_paths.sysvrcnd_path), true },
-#endif
         { NULL, }
 };
 
@@ -1168,6 +1149,70 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
 
                 m->exit_code = MANAGER_KEXEC;
 
+        } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SwitchRoot")) {
+                const char *switch_root, *switch_root_init;
+                char *u, *v;
+                int k;
+
+                if (!dbus_message_get_args(
+                                    message,
+                                    &error,
+                                    DBUS_TYPE_STRING, &switch_root,
+                                    DBUS_TYPE_STRING, &switch_root_init,
+                                    DBUS_TYPE_INVALID))
+                        return bus_send_error_reply(connection, message, &error, -EINVAL);
+
+                if (path_equal(switch_root, "/") || !path_is_absolute(switch_root))
+                        return bus_send_error_reply(connection, message, NULL, -EINVAL);
+
+                if (!isempty(switch_root_init) && !path_is_absolute(switch_root_init))
+                        return bus_send_error_reply(connection, message, NULL, -EINVAL);
+
+                if (m->running_as != MANAGER_SYSTEM) {
+                        dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Switching root is only supported for system managers.");
+                        return bus_send_error_reply(connection, message, &error, -ENOTSUP);
+                }
+
+                /* Safety check */
+                if (isempty(switch_root_init))
+                        k = access(switch_root, F_OK);
+                else {
+                        char *p;
+
+                        p = join(switch_root, "/", switch_root_init, NULL);
+                        if (!p)
+                                goto oom;
+
+                        k = access(p, X_OK);
+                        free(p);
+                }
+                if (k < 0)
+                        return bus_send_error_reply(connection, message, NULL, -errno);
+
+                u = strdup(switch_root);
+                if (!u)
+                        goto oom;
+
+                if (!isempty(switch_root_init)) {
+                        v = strdup(switch_root_init);
+                        if (!v) {
+                                free(u);
+                                goto oom;
+                        }
+                } else
+                        v = NULL;
+
+                free(m->switch_root);
+                free(m->switch_root_init);
+                m->switch_root = u;
+                m->switch_root_init = v;
+
+                reply = dbus_message_new_method_return(message);
+                if (!reply)
+                        goto oom;
+
+                m->exit_code = MANAGER_SWITCH_ROOT;
+
         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
                 char **l = NULL, **e = NULL;
 
@@ -1513,6 +1558,11 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                                 job_type = JOB_RELOAD;
                 }
 
+                if (job_type == JOB_STOP && u->load_state == UNIT_ERROR && unit_active_state(u) == UNIT_INACTIVE) {
+                        dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", name);
+                        return bus_send_error_reply(connection, message, &error, -EPERM);
+                }
+
                 if ((job_type == JOB_START && u->refuse_manual_start) ||
                     (job_type == JOB_STOP && u->refuse_manual_stop) ||
                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&