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-rw-r--r--src/systemctl/systemctl-enable.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/src/systemctl/systemctl-enable.c b/src/systemctl/systemctl-enable.c
new file mode 100644
index 0000000..5be4c0c
--- /dev/null
+++ b/src/systemctl/systemctl-enable.c
@@ -0,0 +1,286 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "bus-error.h"
+#include "bus-locator.h"
+#include "locale-util.h"
+#include "path-util.h"
+#include "systemctl-daemon-reload.h"
+#include "systemctl-enable.h"
+#include "systemctl-start-unit.h"
+#include "systemctl-sysv-compat.h"
+#include "systemctl-util.h"
+#include "systemctl.h"
+
+static int normalize_filenames(char **names) {
+ int r;
+
+ STRV_FOREACH(u, names)
+ if (!path_is_absolute(*u)) {
+ char* normalized_path;
+
+ if (!isempty(arg_root))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Non-absolute paths are not allowed when --root is used: %s",
+ *u);
+
+ if (!strchr(*u, '/'))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Link argument must contain at least one directory separator.\n"
+ "If you intended to link a file in the current directory, try ./%s instead.",
+ *u);
+
+ r = path_make_absolute_cwd(*u, &normalized_path);
+ if (r < 0)
+ return r;
+
+ free_and_replace(*u, normalized_path);
+ }
+
+ return 0;
+}
+
+static int normalize_names(char **names) {
+ bool was_path = false;
+
+ STRV_FOREACH(u, names) {
+ int r;
+
+ if (!is_path(*u))
+ continue;
+
+ r = free_and_strdup(u, basename(*u));
+ if (r < 0)
+ return log_error_errno(r, "Failed to normalize unit file path: %m");
+
+ was_path = true;
+ }
+
+ if (was_path)
+ log_warning("Warning: Can't execute disable on the unit file path. Proceeding with the unit name.");
+
+ return 0;
+}
+
+int verb_enable(int argc, char *argv[], void *userdata) {
+ _cleanup_strv_free_ char **names = NULL;
+ const char *verb = argv[0];
+ InstallChange *changes = NULL;
+ size_t n_changes = 0;
+ int carries_install_info = -1;
+ bool ignore_carries_install_info = arg_quiet;
+ int r;
+
+ if (!argv[1])
+ return 0;
+
+ r = mangle_names("to enable", strv_skip(argv, 1), &names);
+ if (r < 0)
+ return r;
+
+ r = enable_sysv_units(verb, names);
+ if (r < 0)
+ return r;
+
+ /* If the operation was fully executed by the SysV compat, let's finish early */
+ if (strv_isempty(names)) {
+ if (arg_no_reload || install_client_side())
+ return 0;
+
+ r = daemon_reload(ACTION_RELOAD, /* graceful= */ false);
+ return r > 0 ? 0 : r;
+ }
+
+ if (streq(verb, "disable")) {
+ r = normalize_names(names);
+ if (r < 0)
+ return r;
+ }
+
+ if (streq(verb, "link")) {
+ r = normalize_filenames(names);
+ if (r < 0)
+ return r;
+ }
+
+ if (install_client_side()) {
+ UnitFileFlags flags;
+
+ flags = unit_file_flags_from_args();
+ if (streq(verb, "enable")) {
+ r = unit_file_enable(arg_scope, flags, arg_root, names, &changes, &n_changes);
+ carries_install_info = r;
+ } else if (streq(verb, "disable"))
+ r = unit_file_disable(arg_scope, flags, arg_root, names, &changes, &n_changes);
+ else if (streq(verb, "reenable")) {
+ r = unit_file_reenable(arg_scope, flags, arg_root, names, &changes, &n_changes);
+ carries_install_info = r;
+ } else if (streq(verb, "link"))
+ r = unit_file_link(arg_scope, flags, arg_root, names, &changes, &n_changes);
+ else if (streq(verb, "preset"))
+ r = unit_file_preset(arg_scope, flags, arg_root, names, arg_preset_mode, &changes, &n_changes);
+ else if (streq(verb, "mask"))
+ r = unit_file_mask(arg_scope, flags, arg_root, names, &changes, &n_changes);
+ else if (streq(verb, "unmask"))
+ r = unit_file_unmask(arg_scope, flags, arg_root, names, &changes, &n_changes);
+ else if (streq(verb, "revert"))
+ r = unit_file_revert(arg_scope, arg_root, names, &changes, &n_changes);
+ else
+ assert_not_reached();
+
+ install_changes_dump(r, verb, changes, n_changes, arg_quiet);
+ if (r < 0)
+ goto finish;
+ r = 0;
+ } else {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ bool expect_carries_install_info = false;
+ bool send_runtime = true, send_force = true, send_preset_mode = false;
+ const char *method;
+ sd_bus *bus;
+
+ if (STR_IN_SET(verb, "mask", "unmask")) {
+ _cleanup_(lookup_paths_free) LookupPaths lp = {};
+
+ r = lookup_paths_init_or_warn(&lp, arg_scope, 0, arg_root);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(name, names) {
+ r = unit_exists(&lp, *name);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ log_notice("Unit %s does not exist, proceeding anyway.", *name);
+ }
+ }
+
+ r = acquire_bus(BUS_MANAGER, &bus);
+ if (r < 0)
+ return r;
+
+ polkit_agent_open_maybe();
+
+ if (streq(verb, "enable")) {
+ method = "EnableUnitFiles";
+ expect_carries_install_info = true;
+ } else if (streq(verb, "disable")) {
+ method = "DisableUnitFiles";
+ send_force = false;
+ } else if (streq(verb, "reenable")) {
+ method = "ReenableUnitFiles";
+ expect_carries_install_info = true;
+ } else if (streq(verb, "link"))
+ method = "LinkUnitFiles";
+ else if (streq(verb, "preset")) {
+
+ if (arg_preset_mode != UNIT_FILE_PRESET_FULL) {
+ method = "PresetUnitFilesWithMode";
+ send_preset_mode = true;
+ } else
+ method = "PresetUnitFiles";
+
+ expect_carries_install_info = true;
+ ignore_carries_install_info = true;
+ } else if (streq(verb, "mask"))
+ method = "MaskUnitFiles";
+ else if (streq(verb, "unmask")) {
+ method = "UnmaskUnitFiles";
+ send_force = false;
+ } else if (streq(verb, "revert")) {
+ method = "RevertUnitFiles";
+ send_runtime = send_force = false;
+ } else
+ assert_not_reached();
+
+ r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, method);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append_strv(m, names);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ if (send_preset_mode) {
+ r = sd_bus_message_append(m, "s", unit_file_preset_mode_to_string(arg_preset_mode));
+ if (r < 0)
+ return bus_log_create_error(r);
+ }
+
+ if (send_runtime) {
+ r = sd_bus_message_append(m, "b", arg_runtime);
+ if (r < 0)
+ return bus_log_create_error(r);
+ }
+
+ if (send_force) {
+ r = sd_bus_message_append(m, "b", arg_force);
+ if (r < 0)
+ return bus_log_create_error(r);
+ }
+
+ r = sd_bus_call(bus, m, 0, &error, &reply);
+ if (r < 0)
+ return log_error_errno(r, "Failed to %s unit: %s", verb, bus_error_message(&error, r));
+
+ if (expect_carries_install_info) {
+ r = sd_bus_message_read(reply, "b", &carries_install_info);
+ if (r < 0)
+ return bus_log_parse_error(r);
+ }
+
+ r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, &changes, &n_changes);
+ if (r < 0)
+ goto finish;
+
+ /* Try to reload if enabled */
+ if (!arg_no_reload) {
+ r = daemon_reload(ACTION_RELOAD, /* graceful= */ false);
+ if (r > 0)
+ r = 0;
+ } else
+ r = 0;
+ }
+
+ if (carries_install_info == 0 && !ignore_carries_install_info)
+ log_notice("The unit files have no installation config (WantedBy=, RequiredBy=, Also=,\n"
+ "Alias= settings in the [Install] section, and DefaultInstance= for template\n"
+ "units). This means they are not meant to be enabled using systemctl.\n"
+ " \n" /* trick: the space is needed so that the line does not get stripped from output */
+ "Possible reasons for having this kind of units are:\n"
+ "%1$s A unit may be statically enabled by being symlinked from another unit's\n"
+ " .wants/ or .requires/ directory.\n"
+ "%1$s A unit's purpose may be to act as a helper for some other unit which has\n"
+ " a requirement dependency on it.\n"
+ "%1$s A unit may be started when needed via activation (socket, path, timer,\n"
+ " D-Bus, udev, scripted systemctl call, ...).\n"
+ "%1$s In case of template units, the unit is meant to be enabled with some\n"
+ " instance name specified.",
+ special_glyph(SPECIAL_GLYPH_BULLET));
+
+ if (arg_now && STR_IN_SET(argv[0], "enable", "disable", "mask")) {
+ sd_bus *bus;
+ size_t len, i;
+
+ r = acquire_bus(BUS_MANAGER, &bus);
+ if (r < 0)
+ goto finish;
+
+ len = strv_length(names);
+ {
+ char *new_args[len + 2];
+
+ new_args[0] = (char*) (streq(argv[0], "enable") ? "start" : "stop");
+ for (i = 0; i < len; i++)
+ new_args[i + 1] = basename(names[i]);
+ new_args[i + 1] = NULL;
+
+ r = verb_start(len + 1, new_args, userdata);
+ }
+ }
+
+finish:
+ install_changes_free(changes, n_changes);
+
+ return r;
+}
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