src/core/dbus-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include "sd-bus.h"
   5
   6 #include "unit.h"
   7
   8 int bus_property_get_triggered_unit(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
   9
  10 #define BUS_DEFINE_SET_TRANSIENT(function, bus_type, type, cast_type, fmt) \
  11         int bus_set_transient_##function(                               \
  12                         Unit *u,                                        \
  13                         const char *name,                               \
  14                         cast_type *p,                                   \
  15                         sd_bus_message *message,                        \
  16                         UnitWriteFlags flags,                           \
  17                         sd_bus_error *error) {                          \
  18                                                                         \
  19                 type v;                                                 \
  20                 int r;                                                  \
  21                                                                         \
  22                 assert(p);                                              \
  23                                                                         \
  24                 r = sd_bus_message_read(message, bus_type, &v);         \
  25                 if (r < 0)                                              \
  26                         return r;                                       \
  27                                                                         \
  28                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
  29                         *p = (cast_type) v;                             \
  30                         unit_write_settingf(u, flags, name,             \
  31                                             "%s=" fmt, name, v);        \
  32                 }                                                       \
  33                                                                         \
  34                 return 1;                                               \
  35         }
  36
  37 #define BUS_DEFINE_SET_TRANSIENT_IS_VALID(function, bus_type, type, cast_type, fmt, check) \
  38         int bus_set_transient_##function(                               \
  39                         Unit *u,                                        \
  40                         const char *name,                               \
  41                         cast_type *p,                                   \
  42                         sd_bus_message *message,                        \
  43                         UnitWriteFlags flags,                           \
  44                         sd_bus_error *error) {                          \
  45                                                                         \
  46                 type v;                                                 \
  47                 int r;                                                  \
  48                                                                         \
  49                 assert(p);                                              \
  50                                                                         \
  51                 r = sd_bus_message_read(message, bus_type, &v);         \
  52                 if (r < 0)                                              \
  53                         return r;                                       \
  54                                                                         \
  55                 if (!check(v))                                          \
  56                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
  57                                                  "Invalid %s setting: " fmt, name, v); \
  58                                                                         \
  59                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
  60                         *p = (cast_type) v;                             \
  61                         unit_write_settingf(u, flags, name,             \
  62                                             "%s=" fmt, name, v);        \
  63                 }                                                       \
  64                                                                         \
  65                 return 1;                                               \
  66         }
  67
  68 #define BUS_DEFINE_SET_TRANSIENT_TO_STRING(function, bus_type, type, cast_type, fmt, to_string) \
  69         int bus_set_transient_##function(                               \
  70                         Unit *u,                                        \
  71                         const char *name,                               \
  72                         cast_type *p,                                   \
  73                         sd_bus_message *message,                        \
  74                         UnitWriteFlags flags,                           \
  75                         sd_bus_error *error) {                          \
  76                                                                         \
  77                 const char *s;                                          \
  78                 type v;                                                 \
  79                 int r;                                                  \
  80                                                                         \
  81                 assert(p);                                              \
  82                                                                         \
  83                 r = sd_bus_message_read(message, bus_type, &v);         \
  84                 if (r < 0)                                              \
  85                         return r;                                       \
  86                                                                         \
  87                 s = to_string(v);                                       \
  88                 if (!s)                                                 \
  89                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
  90                                                  "Invalid %s setting: " fmt, name, v); \
  91                                                                         \
  92                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
  93                         *p = (cast_type) v;                             \
  94                         unit_write_settingf(u, flags, name,             \
  95                                             "%s=%s", name, s);          \
  96                 }                                                       \
  97                                                                         \
  98                 return 1;                                               \
  99         }
 100
 101 #define BUS_DEFINE_SET_TRANSIENT_TO_STRING_ALLOC(function, bus_type, type, cast_type, fmt, to_string) \
 102         int bus_set_transient_##function(                               \
 103                         Unit *u,                                        \
 104                         const char *name,                               \
 105                         cast_type *p,                                   \
 106                         sd_bus_message *message,                        \
 107                         UnitWriteFlags flags,                           \
 108                         sd_bus_error *error) {                          \
 109                                                                         \
 110                 _cleanup_free_ char *s = NULL;                          \
 111                 type v;                                                 \
 112                 int r;                                                  \
 113                                                                         \
 114                 assert(p);                                              \
 115                                                                         \
 116                 r = sd_bus_message_read(message, bus_type, &v);         \
 117                 if (r < 0)                                              \
 118                         return r;                                       \
 119                                                                         \
 120                 r = to_string(v, &s);                                   \
 121                 if (r == -EINVAL)                                       \
 122                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 123                                                  "Invalid %s setting: " fmt, name, v); \
 124                 if (r < 0)                                              \
 125                         return r;                                       \
 126                                                                         \
 127                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 128                         *p = (cast_type) v;                             \
 129                         unit_write_settingf(u, flags, name,             \
 130                                             "%s=%s", name, s);          \
 131                 }                                                       \
 132                                                                         \
 133                 return 1;                                               \
 134         }
 135
 136 #define BUS_DEFINE_SET_TRANSIENT_PARSE(function, type, parse)           \
 137         int bus_set_transient_##function(                               \
 138                         Unit *u,                                        \
 139                         const char *name,                               \
 140                         type *p,                                        \
 141                         sd_bus_message *message,                        \
 142                         UnitWriteFlags flags,                           \
 143                         sd_bus_error *error) {                          \
 144                                                                         \
 145                 const char *s;                                          \
 146                 type v;                                                 \
 147                 int r;                                                  \
 148                                                                         \
 149                 assert(p);                                              \
 150                                                                         \
 151                 r = sd_bus_message_read(message, "s", &s);              \
 152                 if (r < 0)                                              \
 153                         return r;                                       \
 154                                                                         \
 155                 v = parse(s);                                           \
 156                 if (v < 0)                                              \
 157                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 158                                                  "Invalid %s setting: %s", name, s); \
 159                                                                         \
 160                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 161                         *p = v;                                         \
 162                         unit_write_settingf(u, flags, name,             \
 163                                             "%s=%s", name, s);          \
 164                 }                                                       \
 165                                                                         \
 166                 return 1;                                               \
 167         }
 168
 169 #define BUS_DEFINE_SET_TRANSIENT_PARSE_PTR(function, type, parse)       \
 170         int bus_set_transient_##function(                               \
 171                         Unit *u,                                        \
 172                         const char *name,                               \
 173                         type *p,                                        \
 174                         sd_bus_message *message,                        \
 175                         UnitWriteFlags flags,                           \
 176                         sd_bus_error *error) {                          \
 177                                                                         \
 178                 const char *s;                                          \
 179                 type v;                                                 \
 180                 int r;                                                  \
 181                                                                         \
 182                 assert(p);                                              \
 183                                                                         \
 184                 r = sd_bus_message_read(message, "s", &s);              \
 185                 if (r < 0)                                              \
 186                         return r;                                       \
 187                                                                         \
 188                 r = parse(s, &v);                                       \
 189                 if (r < 0)                                              \
 190                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 191                                                  "Invalid %s setting: %s", name, s); \
 192                                                                         \
 193                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 194                         *p = v;                                         \
 195                         unit_write_settingf(u, flags, name,             \
 196                                             "%s=%s", name, strempty(s)); \
 197                 }                                                       \
 198                                                                         \
 199                 return 1;                                               \
 200         }
 201
 202 #define BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(function, check)     \
 203         int bus_set_transient_##function(                               \
 204                         Unit *u,                                        \
 205                         const char *name,                               \
 206                         char **p,                                       \
 207                         sd_bus_message *message,                        \
 208                         UnitWriteFlags flags,                           \
 209                         sd_bus_error *error) {                          \
 210                                                                         \
 211                 const char *v;                                          \
 212                 int r;                                                  \
 213                                                                         \
 214                 assert(p);                                              \
 215                                                                         \
 216                 r = sd_bus_message_read(message, "s", &v);              \
 217                 if (r < 0)                                              \
 218                         return r;                                       \
 219                                                                         \
 220                 if (!isempty(v) && !check(v))                           \
 221                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 222                                                  "Invalid %s setting: %s", name, v); \
 223                                                                         \
 224                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 225                         r = free_and_strdup(p, empty_to_null(v));       \
 226                         if (r < 0)                                      \
 227                                 return r;                               \
 228                                                                         \
 229                         unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, \
 230                                             "%s=%s", name, strempty(v)); \
 231                 }                                                       \
 232                                                                         \
 233                 return 1;                                               \
 234         }
 235
 236 int bus_set_transient_mode_t(Unit *u, const char *name, mode_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 237 int bus_set_transient_unsigned(Unit *u, const char *name, unsigned *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 238 int bus_set_transient_user_compat(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 239 int bus_set_transient_path(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 240 int bus_set_transient_string(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 241 int bus_set_transient_bool(Unit *u, const char *name, bool *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 242 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);
 243 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) {
 244         return bus_set_transient_usec_internal(u, name, p, false, message, flags, error);
 245 }
 246 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) {
 247         return bus_set_transient_usec_internal(u, name, p, true, message, flags, error);
 248 }