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https://github.com/systemd/systemd.git
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core: add dbus-util.[ch] to simplify creating transient units
The functions and macros introduced by them will be used in later commits.
This commit is contained in:
Yu Watanabe
parent
e73b1eb2fa
commit
77019691cf
119
src/core/dbus-util.c
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119
src/core/dbus-util.c
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@ -0,0 +1,119 @@
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/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "bus-util.h"
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#include "dbus-util.h"
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#include "parse-util.h"
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#include "path-util.h"
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#include "unit-printf.h"
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#include "user-util.h"
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#include "unit.h"
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BUS_DEFINE_SET_TRANSIENT(mode_t, "u", uint32_t, mode_t, "%040o");
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BUS_DEFINE_SET_TRANSIENT(unsigned, "u", uint32_t, unsigned, "%" PRIu32);
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BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(user, valid_user_group_name_or_id);
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BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(path, path_is_absolute);
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int bus_set_transient_string(
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Unit *u,
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const char *name,
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char **p,
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sd_bus_message *message,
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UnitWriteFlags flags,
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sd_bus_error *error) {
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const char *v;
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int r;
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assert(p);
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r = sd_bus_message_read(message, "s", &v);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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r = free_and_strdup(p, empty_to_null(v));
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if (r < 0)
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return r;
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unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name,
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"%s=%s", name, strempty(v));
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}
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return 1;
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}
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int bus_set_transient_bool(
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Unit *u,
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const char *name,
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bool *p,
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sd_bus_message *message,
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UnitWriteFlags flags,
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sd_bus_error *error) {
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int v, r;
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assert(p);
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r = sd_bus_message_read(message, "b", &v);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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*p = v;
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unit_write_settingf(u, flags, name, "%s=%s", name, yes_no(v));
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}
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return 1;
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}
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int bus_set_transient_usec_internal(
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Unit *u,
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const char *name,
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usec_t *p,
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bool fix_0,
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sd_bus_message *message,
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UnitWriteFlags flags,
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sd_bus_error *error) {
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usec_t v;
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int r;
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assert(p);
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r = sd_bus_message_read(message, "u", &v);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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char *n, ts[FORMAT_TIMESPAN_MAX];
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if (fix_0)
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*p = v ?: USEC_INFINITY;
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else
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*p = v;
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n = strndupa(name, strlen(name) - 4);
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unit_write_settingf(u, flags, name, "%sSec=%s", n,
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format_timespan(ts, sizeof(ts), v, USEC_PER_MSEC));
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}
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return 1;
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}
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271
src/core/dbus-util.h
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271
src/core/dbus-util.h
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@ -0,0 +1,271 @@
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/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "sd-bus.h"
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#include "unit.h"
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#define BUS_DEFINE_SET_TRANSIENT(function, bus_type, type, cast_type, fmt) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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cast_type *p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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type v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, bus_type, &v); \
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if (r < 0) \
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return r; \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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*p = (cast_type) v; \
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unit_write_settingf(u, flags, name, \
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"%s=" fmt, name, v); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define BUS_DEFINE_SET_TRANSIENT_IS_VALID(function, bus_type, type, cast_type, fmt, check) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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cast_type *p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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type v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, bus_type, &v); \
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if (r < 0) \
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return r; \
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\
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if (!check(v)) \
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
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"Invalid %s setting: " fmt, name, v); \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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*p = (cast_type) v; \
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unit_write_settingf(u, flags, name, \
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"%s=" fmt, name, v); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define BUS_DEFINE_SET_TRANSIENT_TO_STRING(function, bus_type, type, cast_type, fmt, to_string) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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cast_type *p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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const char *s; \
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type v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, bus_type, &v); \
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if (r < 0) \
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return r; \
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\
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s = to_string(v); \
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if (!s) \
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
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"Invalid %s setting: " fmt, name, v); \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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*p = (cast_type) v; \
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unit_write_settingf(u, flags, name, \
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"%s=%s", name, s); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define BUS_DEFINE_SET_TRANSIENT_TO_STRING_ALLOC(function, bus_type, type, cast_type, fmt, to_string) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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cast_type *p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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_cleanup_free_ char *s = NULL; \
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type v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, bus_type, &v); \
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if (r < 0) \
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return r; \
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\
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r = to_string(v, &s); \
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if (r == -EINVAL) \
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
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"Invalid %s setting: " fmt, name, v); \
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if (r < 0) \
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return r; \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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*p = (cast_type) v; \
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unit_write_settingf(u, flags, name, \
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"%s=%s", name, s); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define BUS_DEFINE_SET_TRANSIENT_PARSE(function, type, parse) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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type *p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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const char *s; \
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type v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, "s", &s); \
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if (r < 0) \
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return r; \
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\
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v = parse(s); \
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if (v < 0) \
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
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"Invalid %s setting: %s", name, s); \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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*p = v; \
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unit_write_settingf(u, flags, name, \
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"%s=%s", name, s); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define BUS_DEFINE_SET_TRANSIENT_PARSE_PTR(function, type, parse) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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type *p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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const char *s; \
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type v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, "s", &s); \
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if (r < 0) \
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return r; \
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\
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r = parse(s, &v); \
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if (r < 0) \
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
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"Invalid %s setting: %s", name, s); \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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*p = v; \
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unit_write_settingf(u, flags, name, \
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"%s=%s", name, strempty(s)); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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#define BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(function, check) \
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int bus_set_transient_##function( \
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Unit *u, \
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const char *name, \
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char **p, \
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sd_bus_message *message, \
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UnitWriteFlags flags, \
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sd_bus_error *error) { \
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\
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const char *v; \
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int r; \
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\
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assert(p); \
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\
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r = sd_bus_message_read(message, "s", &v); \
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if (r < 0) \
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return r; \
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\
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if (!isempty(v) && !check(v)) \
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
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"Invalid %s setting: %s", name, v); \
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\
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) { \
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r = free_and_strdup(p, empty_to_null(v)); \
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if (r < 0) \
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return r; \
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\
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unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, \
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"%s=%s", name, strempty(v)); \
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} \
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\
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return 1; \
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} \
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struct __useless_struct_to_allow_trailing_semicolon__
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int bus_set_transient_mode_t(Unit *u, const char *name, mode_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
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int bus_set_transient_unsigned(Unit *u, const char *name, unsigned *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
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int bus_set_transient_user(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
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int bus_set_transient_path(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
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int bus_set_transient_string(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
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int bus_set_transient_bool(Unit *u, const char *name, bool *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
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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);
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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) {
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return bus_set_transient_usec_internal(u, name, p, false, message, flags, error);
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}
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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) {
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return bus_set_transient_usec_internal(u, name, p, true, message, flags, error);
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}
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@ -60,6 +60,8 @@ libcore_la_sources = '''
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dbus-timer.h
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dbus-unit.c
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dbus-unit.h
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dbus-util.c
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dbus-util.h
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dbus.c
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dbus.h
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device.c
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