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",                    \
 131                                             name, strempty(s));         \
 132                 }                                                       \
 133                                                                         \
 134                 return 1;                                               \
 135         }
 136
 137 #define BUS_DEFINE_SET_TRANSIENT_PARSE(function, type, parse)           \
 138         int bus_set_transient_##function(                               \
 139                         Unit *u,                                        \
 140                         const char *name,                               \
 141                         type *p,                                        \
 142                         sd_bus_message *message,                        \
 143                         UnitWriteFlags flags,                           \
 144                         sd_bus_error *error) {                          \
 145                                                                         \
 146                 const char *s;                                          \
 147                 type v;                                                 \
 148                 int r;                                                  \
 149                                                                         \
 150                 assert(p);                                              \
 151                                                                         \
 152                 r = sd_bus_message_read(message, "s", &s);              \
 153                 if (r < 0)                                              \
 154                         return r;                                       \
 155                                                                         \
 156                 v = parse(s);                                           \
 157                 if (v < 0)                                              \
 158                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 159                                                  "Invalid %s setting: %s", name, s); \
 160                                                                         \
 161                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 162                         *p = v;                                         \
 163                         unit_write_settingf(u, flags, name,             \
 164                                             "%s=%s", name, s);          \
 165                 }                                                       \
 166                                                                         \
 167                 return 1;                                               \
 168         }
 169
 170 #define BUS_DEFINE_SET_TRANSIENT_PARSE_PTR(function, type, parse)       \
 171         int bus_set_transient_##function(                               \
 172                         Unit *u,                                        \
 173                         const char *name,                               \
 174                         type *p,                                        \
 175                         sd_bus_message *message,                        \
 176                         UnitWriteFlags flags,                           \
 177                         sd_bus_error *error) {                          \
 178                                                                         \
 179                 const char *s;                                          \
 180                 type v;                                                 \
 181                 int r;                                                  \
 182                                                                         \
 183                 assert(p);                                              \
 184                                                                         \
 185                 r = sd_bus_message_read(message, "s", &s);              \
 186                 if (r < 0)                                              \
 187                         return r;                                       \
 188                                                                         \
 189                 r = parse(s, &v);                                       \
 190                 if (r < 0)                                              \
 191                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 192                                                  "Invalid %s setting: %s", name, s); \
 193                                                                         \
 194                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 195                         *p = v;                                         \
 196                         unit_write_settingf(u, flags, name,             \
 197                                             "%s=%s", name, strempty(s)); \
 198                 }                                                       \
 199                                                                         \
 200                 return 1;                                               \
 201         }
 202
 203 #define BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(function, check)     \
 204         int bus_set_transient_##function(                               \
 205                         Unit *u,                                        \
 206                         const char *name,                               \
 207                         char **p,                                       \
 208                         sd_bus_message *message,                        \
 209                         UnitWriteFlags flags,                           \
 210                         sd_bus_error *error) {                          \
 211                                                                         \
 212                 const char *v;                                          \
 213                 int r;                                                  \
 214                                                                         \
 215                 assert(p);                                              \
 216                                                                         \
 217                 r = sd_bus_message_read(message, "s", &v);              \
 218                 if (r < 0)                                              \
 219                         return r;                                       \
 220                                                                         \
 221                 if (!isempty(v) && !check(v))                           \
 222                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 223                                                  "Invalid %s setting: %s", name, v); \
 224                                                                         \
 225                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 226                         r = free_and_strdup(p, empty_to_null(v));       \
 227                         if (r < 0)                                      \
 228                                 return r;                               \
 229                                                                         \
 230                         unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, \
 231                                             "%s=%s", name, strempty(v)); \
 232                 }                                                       \
 233                                                                         \
 234                 return 1;                                               \
 235         }
 236
 237 int bus_set_transient_mode_t(Unit *u, const char *name, mode_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 238 int bus_set_transient_unsigned(Unit *u, const char *name, unsigned *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 239 int bus_set_transient_user_relaxed(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 240 int bus_set_transient_path(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 241 int bus_set_transient_string(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 242 int bus_set_transient_bool(Unit *u, const char *name, bool *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 243 int bus_set_transient_percent(Unit *u, const char *name, int *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 244 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);
 245 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) {
 246         return bus_set_transient_usec_internal(u, name, p, false, message, flags, error);
 247 }
 248 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) {
 249         return bus_set_transient_usec_internal(u, name, p, true, message, flags, error);
 250 }