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authorYu Watanabe <watanabe.yu+github@gmail.com>2018-01-02 02:22:36 +0900
committerYu Watanabe <watanabe.yu+github@gmail.com>2018-01-02 02:22:36 +0900
commit77019691cf629ee8ada94a9a9a1ddd286bbd24f4 (patch)
treeedfe7aaed92b6f16ccf5c604e268df4a1893a5dd /src/core/dbus-util.h
parente73b1eb2fa6a7a5c86662aa08fcbd77d74d720b3 (diff)
downloadsystemd-77019691cf629ee8ada94a9a9a1ddd286bbd24f4.tar.gz
core: add dbus-util.[ch] to simplify creating transient units
The functions and macros introduced by them will be used in later commits.
Diffstat (limited to 'src/core/dbus-util.h')
-rw-r--r--src/core/dbus-util.h271
1 files changed, 271 insertions, 0 deletions
diff --git a/src/core/dbus-util.h b/src/core/dbus-util.h
new file mode 100644
index 0000000000..bef8bc35e1
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+++ b/src/core/dbus-util.h
@@ -0,0 +1,271 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "sd-bus.h"
+#include "unit.h"
+
+#define BUS_DEFINE_SET_TRANSIENT(function, bus_type, type, cast_type, fmt) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ cast_type *p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ type v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, bus_type, &v); \
+ if (r < 0) \
+ return r; \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ *p = (cast_type) v; \
+ unit_write_settingf(u, flags, name, \
+ "%s=" fmt, name, v); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+#define BUS_DEFINE_SET_TRANSIENT_IS_VALID(function, bus_type, type, cast_type, fmt, check) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ cast_type *p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ type v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, bus_type, &v); \
+ if (r < 0) \
+ return r; \
+ \
+ if (!check(v)) \
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
+ "Invalid %s setting: " fmt, name, v); \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ *p = (cast_type) v; \
+ unit_write_settingf(u, flags, name, \
+ "%s=" fmt, name, v); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+#define BUS_DEFINE_SET_TRANSIENT_TO_STRING(function, bus_type, type, cast_type, fmt, to_string) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ cast_type *p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ const char *s; \
+ type v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, bus_type, &v); \
+ if (r < 0) \
+ return r; \
+ \
+ s = to_string(v); \
+ if (!s) \
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
+ "Invalid %s setting: " fmt, name, v); \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ *p = (cast_type) v; \
+ unit_write_settingf(u, flags, name, \
+ "%s=%s", name, s); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+#define BUS_DEFINE_SET_TRANSIENT_TO_STRING_ALLOC(function, bus_type, type, cast_type, fmt, to_string) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ cast_type *p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ _cleanup_free_ char *s = NULL; \
+ type v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, bus_type, &v); \
+ if (r < 0) \
+ return r; \
+ \
+ r = to_string(v, &s); \
+ if (r == -EINVAL) \
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
+ "Invalid %s setting: " fmt, name, v); \
+ if (r < 0) \
+ return r; \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ *p = (cast_type) v; \
+ unit_write_settingf(u, flags, name, \
+ "%s=%s", name, s); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+#define BUS_DEFINE_SET_TRANSIENT_PARSE(function, type, parse) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ type *p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ const char *s; \
+ type v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, "s", &s); \
+ if (r < 0) \
+ return r; \
+ \
+ v = parse(s); \
+ if (v < 0) \
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
+ "Invalid %s setting: %s", name, s); \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ *p = v; \
+ unit_write_settingf(u, flags, name, \
+ "%s=%s", name, s); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+#define BUS_DEFINE_SET_TRANSIENT_PARSE_PTR(function, type, parse) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ type *p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ const char *s; \
+ type v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, "s", &s); \
+ if (r < 0) \
+ return r; \
+ \
+ r = parse(s, &v); \
+ if (r < 0) \
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
+ "Invalid %s setting: %s", name, s); \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ *p = v; \
+ unit_write_settingf(u, flags, name, \
+ "%s=%s", name, strempty(s)); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+#define BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(function, check) \
+ int bus_set_transient_##function( \
+ Unit *u, \
+ const char *name, \
+ char **p, \
+ sd_bus_message *message, \
+ UnitWriteFlags flags, \
+ sd_bus_error *error) { \
+ \
+ const char *v; \
+ int r; \
+ \
+ assert(p); \
+ \
+ r = sd_bus_message_read(message, "s", &v); \
+ if (r < 0) \
+ return r; \
+ \
+ if (!isempty(v) && !check(v)) \
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
+ "Invalid %s setting: %s", name, v); \
+ \
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
+ r = free_and_strdup(p, empty_to_null(v)); \
+ if (r < 0) \
+ return r; \
+ \
+ unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, \
+ "%s=%s", name, strempty(v)); \
+ } \
+ \
+ return 1; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__
+
+int bus_set_transient_mode_t(Unit *u, const char *name, mode_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+int bus_set_transient_unsigned(Unit *u, const char *name, unsigned *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+int bus_set_transient_user(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+int bus_set_transient_path(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+int bus_set_transient_string(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+int bus_set_transient_bool(Unit *u, const char *name, bool *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+int bus_set_transient_usec_internal(Unit *u, const char *name, usec_t *p, bool fix_0, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
+static inline int bus_set_transient_usec(Unit *u, const char *name, usec_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error) {
+ return bus_set_transient_usec_internal(u, name, p, false, message, flags, error);
+}
+static inline int bus_set_transient_usec_fix_0(Unit *u, const char *name, usec_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error) {
+ return bus_set_transient_usec_internal(u, name, p, true, message, flags, error);
+}
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