static int get_cgroup_root(char **ret) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; _cleanup_free_ char *unit = NULL, *path = NULL; const char *m; int r; if (arg_root) { char *aux; aux = strdup(arg_root); if (!aux) return log_oom(); *ret = aux; return 0; } if (!arg_machine) { r = cg_get_root_path(ret); if (r < 0) return log_error_errno(r, "Failed to get root control group path: %m"); return 0; } m = strjoina("/run/systemd/machines/", arg_machine); r = parse_env_file(m, NEWLINE, "SCOPE", &unit, NULL); if (r < 0) return log_error_errno(r, "Failed to load machine data: %m"); path = unit_dbus_path_from_name(unit); if (!path) return log_oom(); r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus); if (r < 0) return log_error_errno(r, "Failed to create bus connection: %m"); r = sd_bus_get_property_string( bus, "org.freedesktop.systemd1", path, unit_dbus_interface_from_name(unit), "ControlGroup", &error, ret); if (r < 0) return log_error_errno(r, "Failed to query unit control group path: %s", bus_error_message(&error, r)); return 0; }
int main(int argc, char *argv[]) { int r, output_flags; log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; r = pager_open(arg_no_pager, false); if (r > 0 && arg_full < 0) arg_full = true; output_flags = arg_all * OUTPUT_SHOW_ALL | (arg_full > 0) * OUTPUT_FULL_WIDTH | arg_kernel_threads * OUTPUT_KERNEL_THREADS; if (arg_names) { _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; _cleanup_free_ char *root = NULL; char **name; STRV_FOREACH(name, arg_names) { int q; if (arg_show_unit != SHOW_UNIT_NONE) { /* Command line arguments are unit names */ _cleanup_free_ char *cgroup = NULL; if (!bus) { /* Connect to the bus only if necessary */ r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, arg_show_unit == SHOW_UNIT_USER, &bus); if (r < 0) { log_error_errno(r, "Failed to create bus connection: %m"); goto finish; } } q = show_cgroup_get_unit_path_and_warn(bus, *name, &cgroup); if (q < 0) goto failed; if (isempty(cgroup)) { log_warning("Unit %s not found.", *name); q = -ENOENT; goto failed; } printf("Unit %s (%s):\n", *name, cgroup); fflush(stdout); q = show_cgroup_by_path(cgroup, NULL, 0, output_flags); } else if (path_startswith(*name, "/sys/fs/cgroup")) { printf("Directory %s:\n", *name); fflush(stdout); q = show_cgroup_by_path(*name, NULL, 0, output_flags); } else { _cleanup_free_ char *c = NULL, *p = NULL, *j = NULL; const char *controller, *path; if (!root) { /* Query root only if needed, treat error as fatal */ r = show_cgroup_get_path_and_warn(arg_machine, NULL, &root); if (r < 0) goto finish; } q = cg_split_spec(*name, &c, &p); if (q < 0) { log_error_errno(q, "Failed to split argument %s: %m", *name); goto failed; } controller = c ?: SYSTEMD_CGROUP_CONTROLLER; if (p) { j = strjoin(root, "/", p); if (!j) { r = log_oom(); goto finish; } path_kill_slashes(j); path = j; } else path = root; show_cg_info(controller, path); q = show_cgroup(controller, path, NULL, 0, output_flags); } failed: if (q < 0 && r >= 0) r = q; } } else {
int main(int argc, char* argv[]) { _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; _cleanup_free_ char *description = NULL, *command = NULL; int r, retval = EXIT_SUCCESS; log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; if (argc > optind && arg_transport == BUS_TRANSPORT_LOCAL) { /* Patch in an absolute path */ r = find_binary(argv[optind], &command); if (r < 0) { log_error_errno(r, "Failed to find executable %s: %m", argv[optind]); goto finish; } argv[optind] = command; } if (!arg_description) { description = strv_join(argv + optind, " "); if (!description) { r = log_oom(); goto finish; } if (arg_unit && isempty(description)) { r = free_and_strdup(&description, arg_unit); if (r < 0) goto finish; } arg_description = description; } /* If --wait is used connect via the bus, unconditionally, as ref/unref is not supported via the limited direct * connection */ if (arg_wait) r = bus_connect_transport(arg_transport, arg_host, arg_user, &bus); else r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus); if (r < 0) { log_error_errno(r, "Failed to create bus connection: %m"); goto finish; } if (arg_scope) r = start_transient_scope(bus, argv + optind); else if (with_timer()) r = start_transient_timer(bus, argv + optind); else r = start_transient_service(bus, argv + optind, &retval); finish: strv_free(arg_environment); strv_free(arg_property); strv_free(arg_timer_property); return r < 0 ? EXIT_FAILURE : retval; }