static int operation_done(sd_event_source *s, const siginfo_t *si, void *userdata) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; Operation *o = userdata; int r; assert(o); assert(si); log_debug("Operating " PID_FMT " is now complete with code=%s status=%i", o->pid, sigchld_code_to_string(si->si_code), si->si_status); o->pid = 0; if (si->si_code != CLD_EXITED) { r = sd_bus_error_setf(&error, SD_BUS_ERROR_FAILED, "Child died abnormally."); goto fail; } if (si->si_status == EXIT_SUCCESS) r = 0; else if (read(o->errno_fd, &r, sizeof(r)) != sizeof(r)) { /* Try to acquire error code for failed operation */ r = sd_bus_error_setf(&error, SD_BUS_ERROR_FAILED, "Child failed."); goto fail; } if (o->done) { /* A completion routine is set for this operation, call it. */ r = o->done(o, r, &error); if (r < 0) { if (!sd_bus_error_is_set(&error)) sd_bus_error_set_errno(&error, r); goto fail; } } else { /* The default operation when done is to simply return an error on failure or an empty success * message on success. */ if (r < 0) { sd_bus_error_set_errno(&error, r); goto fail; } r = sd_bus_reply_method_return(o->message, NULL); if (r < 0) log_error_errno(r, "Failed to reply to message: %m"); } operation_free(o); return 0; fail: r = sd_bus_reply_method_error(o->message, &error); if (r < 0) log_error_errno(r, "Failed to reply to message: %m"); operation_free(o); return 0; }
_public_ int sd_bus_reply_method_error( sd_bus_message *call, const sd_bus_error *e) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL; int r; assert_return(call, -EINVAL); assert_return(call->sealed, -EPERM); assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); assert_return(sd_bus_error_is_set(e), -EINVAL); assert_return(call->bus, -EINVAL); assert_return(!bus_pid_changed(call->bus), -ECHILD); if (!BUS_IS_OPEN(call->bus->state)) return -ENOTCONN; if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) return 0; r = sd_bus_message_new_method_error(call, &m, e); if (r < 0) return r; return sd_bus_send(call->bus, m, NULL); }
_public_ int sd_bus_reply_method_errno( sd_bus_message *call, int error, const sd_bus_error *p) { _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; assert_return(call, -EINVAL); assert_return(call->sealed, -EPERM); assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); assert_return(call->bus, -EINVAL); assert_return(!bus_pid_changed(call->bus), -ECHILD); if (!BUS_IS_OPEN(call->bus->state)) return -ENOTCONN; if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) return 0; if (sd_bus_error_is_set(p)) return sd_bus_reply_method_error(call, p); sd_bus_error_set_errno(&berror, error); return sd_bus_reply_method_error(call, &berror); }
static void stop_scope_unit(sd_bus *connection, const char *unit_name) { sd_bus_error error = SD_BUS_ERROR_NULL; int rc = sd_bus_call_method(connection, systemd_bus_name, systemd_path_name, manager_interface, "StopUnit", &error, NULL, "ss", unit_name, "fail"); if (rc < 0) { if (sd_bus_error_is_set(&error)) { // NoSuchUnit errors are expected as the contained processes can die at any point. if (strcmp(error.name, "org.freedesktop.systemd1.NoSuchUnit")) errx(EXIT_FAILURE, "%s", error.message); sd_bus_error_free(&error); } else errx(EXIT_FAILURE, "%s", strerror(-rc)); } }
static void start_scope_unit(sd_bus *connection, pid_t child_pid, long memory_limit, char *devices, const char *unit_name) { sd_bus_message *message = NULL; check(sd_bus_message_new_method_call(connection, &message, systemd_bus_name, systemd_path_name, manager_interface, "StartTransientUnit")); check(sd_bus_message_append(message, "ss", unit_name, "fail")); check(sd_bus_message_open_container(message, 'a', "(sv)")); check(sd_bus_message_append(message, "(sv)", "PIDs", "au", 1, child_pid)); check(sd_bus_message_append(message, "(sv)", "Description", "s", "Playpen application sandbox")); check(sd_bus_message_append(message, "(sv)", "MemoryLimit", "t", 1024ULL * 1024ULL * (unsigned long long)memory_limit)); check(sd_bus_message_append(message, "(sv)", "DevicePolicy", "s", "strict")); if (devices) { check(sd_bus_message_open_container(message, 'r', "sv")); check(sd_bus_message_append(message, "s", "DeviceAllow")); check(sd_bus_message_open_container(message, 'v', "a(ss)")); check(sd_bus_message_open_container(message, 'a', "(ss)")); for (char *s_ptr = devices, *saveptr; ; s_ptr = NULL) { const char *device = strtok_r(s_ptr, ",", &saveptr); if (!device) break; char *split = strchr(device, ':'); if (!split) errx(EXIT_FAILURE, "invalid device parameter `%s`", device); *split = '\0'; sd_bus_message_append(message, "(ss)", device, split + 1); } check(sd_bus_message_close_container(message)); check(sd_bus_message_close_container(message)); check(sd_bus_message_close_container(message)); } check(sd_bus_message_append(message, "(sv)", "CPUAccounting", "b", 1)); check(sd_bus_message_append(message, "(sv)", "BlockIOAccounting", "b", 1)); check(sd_bus_message_close_container(message)); check(sd_bus_message_append(message, "a(sa(sv))", 0)); sd_bus_error error = SD_BUS_ERROR_NULL; int rc = sd_bus_call(connection, message, 0, &error, NULL); if (rc < 0) errx(EXIT_FAILURE, "%s", sd_bus_error_is_set(&error) ? error.message : strerror(-rc)); sd_bus_message_unref(message); wait_for_unit(child_pid, unit_name); }
static int bus_scope_abandon(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Scope *s = userdata; int r; assert(bus); assert(message); assert(s); r = scope_abandon(s); if (sd_bus_error_is_set(error)) return r; if (r == -ESTALE) return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id); return sd_bus_reply_method_return(message, NULL); }
int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error) { assert(m); if (r < 0) { if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) sd_bus_reply_method_errno(m, r, error); } else if (sd_bus_error_is_set(error)) { if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) sd_bus_reply_method_error(m, error); } else return r; log_debug("Failed to process message [type=%s sender=%s path=%s interface=%s member=%s signature=%s]: %s", bus_message_type_to_string(m->header->type), strna(m->sender), strna(m->path), strna(m->interface), strna(m->member), strna(m->root_container.signature), bus_error_message(error, r)); return 1; }
int main(int argc, char *argv[]) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL, second = SD_BUS_ERROR_NULL; const sd_bus_error const_error = SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_EXISTS, "const error"); const sd_bus_error temporarily_const_error = { .name = SD_BUS_ERROR_ACCESS_DENIED, .message = "oh! no", ._need_free = -1 }; assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set(&error, SD_BUS_ERROR_NOT_SUPPORTED, "xxx") == -ENOTSUP); assert_se(streq(error.name, SD_BUS_ERROR_NOT_SUPPORTED)); assert_se(streq(error.message, "xxx")); assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_NOT_SUPPORTED)); assert_se(sd_bus_error_get_errno(&error) == ENOTSUP); assert_se(sd_bus_error_is_set(&error)); sd_bus_error_free(&error); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_setf(&error, SD_BUS_ERROR_FILE_NOT_FOUND, "yyy %i", -1) == -ENOENT); assert_se(streq(error.name, SD_BUS_ERROR_FILE_NOT_FOUND)); assert_se(streq(error.message, "yyy -1")); assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND)); assert_se(sd_bus_error_get_errno(&error) == ENOENT); assert_se(sd_bus_error_is_set(&error)); assert_se(!sd_bus_error_is_set(&second)); assert_se(second._need_free == 0); assert_se(error._need_free > 0); assert_se(sd_bus_error_copy(&second, &error) == -ENOENT); assert_se(second._need_free > 0); assert_se(streq(error.name, second.name)); assert_se(streq(error.message, second.message)); assert_se(sd_bus_error_get_errno(&second) == ENOENT); assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_FILE_NOT_FOUND)); assert_se(sd_bus_error_is_set(&second)); sd_bus_error_free(&error); sd_bus_error_free(&second); assert_se(!sd_bus_error_is_set(&second)); assert_se(const_error._need_free == 0); assert_se(sd_bus_error_copy(&second, &const_error) == -EEXIST); assert_se(second._need_free == 0); assert_se(streq(const_error.name, second.name)); assert_se(streq(const_error.message, second.message)); assert_se(sd_bus_error_get_errno(&second) == EEXIST); assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_FILE_EXISTS)); assert_se(sd_bus_error_is_set(&second)); sd_bus_error_free(&second); assert_se(!sd_bus_error_is_set(&second)); assert_se(temporarily_const_error._need_free < 0); assert_se(sd_bus_error_copy(&second, &temporarily_const_error) == -EACCES); assert_se(second._need_free > 0); assert_se(streq(temporarily_const_error.name, second.name)); assert_se(streq(temporarily_const_error.message, second.message)); assert_se(sd_bus_error_get_errno(&second) == EACCES); assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_ACCESS_DENIED)); assert_se(sd_bus_error_is_set(&second)); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set_const(&error, "System.Error.EUCLEAN", "Hallo") == -EUCLEAN); assert_se(streq(error.name, "System.Error.EUCLEAN")); assert_se(streq(error.message, "Hallo")); assert_se(sd_bus_error_has_name(&error, "System.Error.EUCLEAN")); assert_se(sd_bus_error_get_errno(&error) == EUCLEAN); assert_se(sd_bus_error_is_set(&error)); sd_bus_error_free(&error); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set_errno(&error, EBUSY) == -EBUSY); assert_se(streq(error.name, "System.Error.EBUSY")); assert_se(streq(error.message, strerror(EBUSY))); assert_se(sd_bus_error_has_name(&error, "System.Error.EBUSY")); assert_se(sd_bus_error_get_errno(&error) == EBUSY); assert_se(sd_bus_error_is_set(&error)); sd_bus_error_free(&error); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set_errnof(&error, EIO, "Waldi %c", 'X') == -EIO); assert_se(streq(error.name, SD_BUS_ERROR_IO_ERROR)); assert_se(streq(error.message, "Waldi X")); assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_IO_ERROR)); assert_se(sd_bus_error_get_errno(&error) == EIO); assert_se(sd_bus_error_is_set(&error)); return 0; }
static void test_error(void) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL, second = SD_BUS_ERROR_NULL; const sd_bus_error const_error = SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_EXISTS, "const error"); const sd_bus_error temporarily_const_error = { .name = SD_BUS_ERROR_ACCESS_DENIED, .message = "oh! no", ._need_free = -1 }; assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set(&error, SD_BUS_ERROR_NOT_SUPPORTED, "xxx") == -EOPNOTSUPP); assert_se(streq(error.name, SD_BUS_ERROR_NOT_SUPPORTED)); assert_se(streq(error.message, "xxx")); assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_NOT_SUPPORTED)); assert_se(sd_bus_error_get_errno(&error) == EOPNOTSUPP); assert_se(sd_bus_error_is_set(&error)); sd_bus_error_free(&error); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_setf(&error, SD_BUS_ERROR_FILE_NOT_FOUND, "yyy %i", -1) == -ENOENT); assert_se(streq(error.name, SD_BUS_ERROR_FILE_NOT_FOUND)); assert_se(streq(error.message, "yyy -1")); assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND)); assert_se(sd_bus_error_get_errno(&error) == ENOENT); assert_se(sd_bus_error_is_set(&error)); assert_se(!sd_bus_error_is_set(&second)); assert_se(second._need_free == 0); assert_se(error._need_free > 0); assert_se(sd_bus_error_copy(&second, &error) == -ENOENT); assert_se(second._need_free > 0); assert_se(streq(error.name, second.name)); assert_se(streq(error.message, second.message)); assert_se(sd_bus_error_get_errno(&second) == ENOENT); assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_FILE_NOT_FOUND)); assert_se(sd_bus_error_is_set(&second)); sd_bus_error_free(&error); sd_bus_error_free(&second); assert_se(!sd_bus_error_is_set(&second)); assert_se(const_error._need_free == 0); assert_se(sd_bus_error_copy(&second, &const_error) == -EEXIST); assert_se(second._need_free == 0); assert_se(streq(const_error.name, second.name)); assert_se(streq(const_error.message, second.message)); assert_se(sd_bus_error_get_errno(&second) == EEXIST); assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_FILE_EXISTS)); assert_se(sd_bus_error_is_set(&second)); sd_bus_error_free(&second); assert_se(!sd_bus_error_is_set(&second)); assert_se(temporarily_const_error._need_free < 0); assert_se(sd_bus_error_copy(&second, &temporarily_const_error) == -EACCES); assert_se(second._need_free > 0); assert_se(streq(temporarily_const_error.name, second.name)); assert_se(streq(temporarily_const_error.message, second.message)); assert_se(sd_bus_error_get_errno(&second) == EACCES); assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_ACCESS_DENIED)); assert_se(sd_bus_error_is_set(&second)); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set_const(&error, "System.Error.EUCLEAN", "Hallo") == -EUCLEAN); assert_se(streq(error.name, "System.Error.EUCLEAN")); assert_se(streq(error.message, "Hallo")); assert_se(sd_bus_error_has_name(&error, "System.Error.EUCLEAN")); assert_se(sd_bus_error_get_errno(&error) == EUCLEAN); assert_se(sd_bus_error_is_set(&error)); sd_bus_error_free(&error); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set_errno(&error, EBUSY) == -EBUSY); assert_se(streq(error.name, "System.Error.EBUSY")); assert_se(streq(error.message, strerror(EBUSY))); assert_se(sd_bus_error_has_name(&error, "System.Error.EBUSY")); assert_se(sd_bus_error_get_errno(&error) == EBUSY); assert_se(sd_bus_error_is_set(&error)); sd_bus_error_free(&error); assert_se(!sd_bus_error_is_set(&error)); assert_se(sd_bus_error_set_errnof(&error, EIO, "Waldi %c", 'X') == -EIO); assert_se(streq(error.name, SD_BUS_ERROR_IO_ERROR)); assert_se(streq(error.message, "Waldi X")); assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_IO_ERROR)); assert_se(sd_bus_error_get_errno(&error) == EIO); assert_se(sd_bus_error_is_set(&error)); } extern const sd_bus_error_map __start_BUS_ERROR_MAP[]; extern const sd_bus_error_map __stop_BUS_ERROR_MAP[]; static void dump_mapping_table(void) { const sd_bus_error_map *m; printf("----- errno mappings ------\n"); m = __start_BUS_ERROR_MAP; while (m < __stop_BUS_ERROR_MAP) { if (m->code == BUS_ERROR_MAP_END_MARKER) { m = ALIGN8_PTR(m+1); continue; } printf("%s -> %i/%s\n", strna(m->name), m->code, strna(errno_to_name(m->code))); m ++; } printf("---------------------------\n"); } static void test_errno_mapping_standard(void) { assert_se(sd_bus_error_set(NULL, "System.Error.EUCLEAN", NULL) == -EUCLEAN); assert_se(sd_bus_error_set(NULL, "System.Error.EBUSY", NULL) == -EBUSY); assert_se(sd_bus_error_set(NULL, "System.Error.EINVAL", NULL) == -EINVAL); assert_se(sd_bus_error_set(NULL, "System.Error.WHATSIT", NULL) == -EIO); }
int main(int argc, char *argv[]) { _cleanup_(sd_bus_error_free) sd_bus_error err = SD_BUS_ERROR_NULL; Manager *m = NULL; Unit *a = NULL, *b = NULL, *c = NULL, *d = NULL, *e = NULL, *g = NULL, *h = NULL; FILE *serial = NULL; FDSet *fdset = NULL; Job *j; int r; /* prepare the test */ assert_se(set_unit_path(TEST_DIR) >= 0); r = manager_new(MANAGER_USER, true, &m); if (IN_SET(r, -EPERM, -EACCES, -EADDRINUSE, -EHOSTDOWN, -ENOENT, -ENOEXEC)) { printf("Skipping test: manager_new: %s", strerror(-r)); return EXIT_TEST_SKIP; } assert_se(r >= 0); assert_se(manager_startup(m, serial, fdset) >= 0); printf("Load1:\n"); assert_se(manager_load_unit(m, "a.service", NULL, NULL, &a) >= 0); assert_se(manager_load_unit(m, "b.service", NULL, NULL, &b) >= 0); assert_se(manager_load_unit(m, "c.service", NULL, NULL, &c) >= 0); manager_dump_units(m, stdout, "\t"); printf("Test1: (Trivial)\n"); r = manager_add_job(m, JOB_START, c, JOB_REPLACE, &err, &j); if (sd_bus_error_is_set(&err)) log_error("error: %s: %s", err.name, err.message); assert_se(r == 0); manager_dump_jobs(m, stdout, "\t"); printf("Load2:\n"); manager_clear_jobs(m); assert_se(manager_load_unit(m, "d.service", NULL, NULL, &d) >= 0); assert_se(manager_load_unit(m, "e.service", NULL, NULL, &e) >= 0); manager_dump_units(m, stdout, "\t"); printf("Test2: (Cyclic Order, Unfixable)\n"); assert_se(manager_add_job(m, JOB_START, d, JOB_REPLACE, NULL, &j) == -EDEADLK); manager_dump_jobs(m, stdout, "\t"); printf("Test3: (Cyclic Order, Fixable, Garbage Collector)\n"); assert_se(manager_add_job(m, JOB_START, e, JOB_REPLACE, NULL, &j) == 0); manager_dump_jobs(m, stdout, "\t"); printf("Test4: (Identical transaction)\n"); assert_se(manager_add_job(m, JOB_START, e, JOB_FAIL, NULL, &j) == 0); manager_dump_jobs(m, stdout, "\t"); printf("Load3:\n"); assert_se(manager_load_unit(m, "g.service", NULL, NULL, &g) >= 0); manager_dump_units(m, stdout, "\t"); printf("Test5: (Colliding transaction, fail)\n"); assert_se(manager_add_job(m, JOB_START, g, JOB_FAIL, NULL, &j) == -EDEADLK); printf("Test6: (Colliding transaction, replace)\n"); assert_se(manager_add_job(m, JOB_START, g, JOB_REPLACE, NULL, &j) == 0); manager_dump_jobs(m, stdout, "\t"); printf("Test7: (Unmergeable job type, fail)\n"); assert_se(manager_add_job(m, JOB_STOP, g, JOB_FAIL, NULL, &j) == -EDEADLK); printf("Test8: (Mergeable job type, fail)\n"); assert_se(manager_add_job(m, JOB_RESTART, g, JOB_FAIL, NULL, &j) == 0); manager_dump_jobs(m, stdout, "\t"); printf("Test9: (Unmergeable job type, replace)\n"); assert_se(manager_add_job(m, JOB_STOP, g, JOB_REPLACE, NULL, &j) == 0); manager_dump_jobs(m, stdout, "\t"); printf("Load4:\n"); assert_se(manager_load_unit(m, "h.service", NULL, NULL, &h) >= 0); manager_dump_units(m, stdout, "\t"); printf("Test10: (Unmergeable job type of auxiliary job, fail)\n"); assert_se(manager_add_job(m, JOB_START, h, JOB_FAIL, NULL, &j) == 0); manager_dump_jobs(m, stdout, "\t"); manager_free(m); return 0; }