Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 337 insertions, 0 deletions

diff --git a/src/systemctl/systemctl-enable.c b/src/systemctl/systemctl-enable.c
new file mode 100644
index 0000000..7d9b7c7
--- /dev/null
+++ b/src/systemctl/systemctl-enable.c
@@ -0,0 +1,337 @@
+/* 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];
+        int carries_install_info = -1;
+        bool ignore_carries_install_info = arg_quiet || arg_no_warn;
+        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;
+                InstallChange *changes = NULL;
+                size_t n_changes = 0;
+
+                CLEANUP_ARRAY(changes, n_changes, install_changes_free);
+
+                flags = unit_file_flags_from_args();
+                if (streq(verb, "enable")) {
+                        r = unit_file_enable(arg_runtime_scope, flags, arg_root, names, &changes, &n_changes);
+                        carries_install_info = r;
+                } else if (streq(verb, "disable")) {
+                        r = unit_file_disable(arg_runtime_scope, flags, arg_root, names, &changes, &n_changes);
+                        carries_install_info = r;
+                } else if (streq(verb, "reenable")) {
+                        r = unit_file_reenable(arg_runtime_scope, flags, arg_root, names, &changes, &n_changes);
+                        carries_install_info = r;
+                } else if (streq(verb, "link"))
+                        r = unit_file_link(arg_runtime_scope, flags, arg_root, names, &changes, &n_changes);
+                else if (streq(verb, "preset"))
+                        r = unit_file_preset(arg_runtime_scope, flags, arg_root, names, arg_preset_mode, &changes, &n_changes);
+                else if (streq(verb, "mask"))
+                        r = unit_file_mask(arg_runtime_scope, flags, arg_root, names, &changes, &n_changes);
+                else if (streq(verb, "unmask"))
+                        r = unit_file_unmask(arg_runtime_scope, flags, arg_root, names, &changes, &n_changes);
+                else if (streq(verb, "revert"))
+                        r = unit_file_revert(arg_runtime_scope, arg_root, names, &changes, &n_changes);
+                else
+                        assert_not_reached();
+
+                install_changes_dump(r, verb, changes, n_changes, arg_quiet);
+                if (r < 0)
+                        return r;
+        } 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, *warn_trigger_operation = NULL;
+                bool warn_trigger_ignore_masked = true; /* suppress "used uninitialized" warning */
+                sd_bus *bus;
+
+                if (STR_IN_SET(verb, "mask", "unmask")) {
+                        _cleanup_(lookup_paths_free) LookupPaths lp = {};
+
+                        r = lookup_paths_init_or_warn(&lp, arg_runtime_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 = "DisableUnitFilesWithFlagsAndInstallInfo";
+                        expect_carries_install_info = true;
+                        send_force = false;
+
+                        warn_trigger_operation = "Disabling";
+                        warn_trigger_ignore_masked = true;
+                } 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";
+
+                        warn_trigger_operation = "Masking";
+                        warn_trigger_ignore_masked = false;
+                } 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) {
+                        if (streq(method, "DisableUnitFilesWithFlagsAndInstallInfo"))
+                                r = sd_bus_message_append(m, "t", arg_runtime ? (uint64_t) UNIT_FILE_RUNTIME : UINT64_C(0));
+                        else
+                                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);
+                if (r < 0)
+                        return r;
+
+                /* Try to reload if enabled */
+                if (!arg_no_reload) {
+                        r = daemon_reload(ACTION_RELOAD, /* graceful= */ false);
+                        if (r < 0)
+                                return r;
+                }
+
+                if (warn_trigger_operation && !arg_quiet && !arg_no_warn)
+                        STRV_FOREACH(unit, names)
+                                warn_triggering_units(bus, *unit, warn_trigger_operation, warn_trigger_ignore_masked);
+        }
+
+        if (carries_install_info == 0 && !ignore_carries_install_info)
+                log_notice("The unit files have no installation config (WantedBy=, RequiredBy=, UpheldBy=,\n"
+                           "Also=, or Alias= settings in the [Install] section, and DefaultInstance= for\n"
+                           "template units). This means they are not meant to be enabled or disabled using systemctl.\n"
+                           " \n" /* trick: the space is needed so that the line does not get stripped from output */
+                           "Possible reasons for having these kinds of units are:\n"
+                           "%1$s A unit may be statically enabled by being symlinked from another unit's\n"
+                           "  .wants/, .requires/, or .upholds/ directory.\n"
+                           "%1$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 (streq(verb, "disable") && arg_runtime_scope == RUNTIME_SCOPE_USER && !arg_quiet && !arg_no_warn) {
+                /* If some of the units are disabled in user scope but still enabled in global scope,
+                 * we emit a warning for that. */
+
+                /* No strv_free here, strings are owned by 'names' */
+                _cleanup_free_ char **enabled_in_global_scope = NULL;
+
+                STRV_FOREACH(name, names) {
+                        UnitFileState state;
+
+                        r = unit_file_get_state(RUNTIME_SCOPE_GLOBAL, arg_root, *name, &state);
+                        if (r == -ENOENT)
+                                continue;
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to get unit file state for %s: %m", *name);
+
+                        if (IN_SET(state, UNIT_FILE_ENABLED, UNIT_FILE_ENABLED_RUNTIME)) {
+                                r = strv_push(&enabled_in_global_scope, *name);
+                                if (r < 0)
+                                        return log_oom();
+                        }
+                }
+
+                if (!strv_isempty(enabled_in_global_scope)) {
+                        _cleanup_free_ char *joined = NULL;
+
+                        joined = strv_join(enabled_in_global_scope, ", ");
+                        if (!joined)
+                                return log_oom();
+
+                        log_notice("The following unit files have been enabled in global scope. This means\n"
+                                   "they will still be started automatically after a successful disablement\n"
+                                   "in user scope:\n"
+                                   "%s",
+                                   joined);
+                }
+        }
+
+        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)
+                        return r;
+
+                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);
+                }
+        }
+
+        return 0;
+}