src/core/dbus-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2010 Lennart Poettering
   8 ***/
   9
  10 #include "sd-bus.h"
  11
  12 #include "unit.h"
  13
  14 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);
  15
  16 #define BUS_DEFINE_SET_TRANSIENT(function, bus_type, type, cast_type, fmt) \
  17         int bus_set_transient_##function(                               \
  18                         Unit *u,                                        \
  19                         const char *name,                               \
  20                         cast_type *p,                                   \
  21                         sd_bus_message *message,                        \
  22                         UnitWriteFlags flags,                           \
  23                         sd_bus_error *error) {                          \
  24                                                                         \
  25                 type v;                                                 \
  26                 int r;                                                  \
  27                                                                         \
  28                 assert(p);                                              \
  29                                                                         \
  30                 r = sd_bus_message_read(message, bus_type, &v);         \
  31                 if (r < 0)                                              \
  32                         return r;                                       \
  33                                                                         \
  34                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
  35                         *p = (cast_type) v;                             \
  36                         unit_write_settingf(u, flags, name,             \
  37                                             "%s=" fmt, name, v);        \
  38                 }                                                       \
  39                                                                         \
  40                 return 1;                                               \
  41         }
  42
  43 #define BUS_DEFINE_SET_TRANSIENT_IS_VALID(function, bus_type, type, cast_type, fmt, check) \
  44         int bus_set_transient_##function(                               \
  45                         Unit *u,                                        \
  46                         const char *name,                               \
  47                         cast_type *p,                                   \
  48                         sd_bus_message *message,                        \
  49                         UnitWriteFlags flags,                           \
  50                         sd_bus_error *error) {                          \
  51                                                                         \
  52                 type v;                                                 \
  53                 int r;                                                  \
  54                                                                         \
  55                 assert(p);                                              \
  56                                                                         \
  57                 r = sd_bus_message_read(message, bus_type, &v);         \
  58                 if (r < 0)                                              \
  59                         return r;                                       \
  60                                                                         \
  61                 if (!check(v))                                          \
  62                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
  63                                                  "Invalid %s setting: " fmt, name, v); \
  64                                                                         \
  65                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
  66                         *p = (cast_type) v;                             \
  67                         unit_write_settingf(u, flags, name,             \
  68                                             "%s=" fmt, name, v);        \
  69                 }                                                       \
  70                                                                         \
  71                 return 1;                                               \
  72         }
  73
  74 #define BUS_DEFINE_SET_TRANSIENT_TO_STRING(function, bus_type, type, cast_type, fmt, to_string) \
  75         int bus_set_transient_##function(                               \
  76                         Unit *u,                                        \
  77                         const char *name,                               \
  78                         cast_type *p,                                   \
  79                         sd_bus_message *message,                        \
  80                         UnitWriteFlags flags,                           \
  81                         sd_bus_error *error) {                          \
  82                                                                         \
  83                 const char *s;                                          \
  84                 type v;                                                 \
  85                 int r;                                                  \
  86                                                                         \
  87                 assert(p);                                              \
  88                                                                         \
  89                 r = sd_bus_message_read(message, bus_type, &v);         \
  90                 if (r < 0)                                              \
  91                         return r;                                       \
  92                                                                         \
  93                 s = to_string(v);                                       \
  94                 if (!s)                                                 \
  95                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
  96                                                  "Invalid %s setting: " fmt, name, v); \
  97                                                                         \
  98                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
  99                         *p = (cast_type) v;                             \
 100                         unit_write_settingf(u, flags, name,             \
 101                                             "%s=%s", name, s);          \
 102                 }                                                       \
 103                                                                         \
 104                 return 1;                                               \
 105         }
 106
 107 #define BUS_DEFINE_SET_TRANSIENT_TO_STRING_ALLOC(function, bus_type, type, cast_type, fmt, to_string) \
 108         int bus_set_transient_##function(                               \
 109                         Unit *u,                                        \
 110                         const char *name,                               \
 111                         cast_type *p,                                   \
 112                         sd_bus_message *message,                        \
 113                         UnitWriteFlags flags,                           \
 114                         sd_bus_error *error) {                          \
 115                                                                         \
 116                 _cleanup_free_ char *s = NULL;                          \
 117                 type v;                                                 \
 118                 int r;                                                  \
 119                                                                         \
 120                 assert(p);                                              \
 121                                                                         \
 122                 r = sd_bus_message_read(message, bus_type, &v);         \
 123                 if (r < 0)                                              \
 124                         return r;                                       \
 125                                                                         \
 126                 r = to_string(v, &s);                                   \
 127                 if (r == -EINVAL)                                       \
 128                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 129                                                  "Invalid %s setting: " fmt, name, v); \
 130                 if (r < 0)                                              \
 131                         return r;                                       \
 132                                                                         \
 133                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 134                         *p = (cast_type) v;                             \
 135                         unit_write_settingf(u, flags, name,             \
 136                                             "%s=%s", name, s);          \
 137                 }                                                       \
 138                                                                         \
 139                 return 1;                                               \
 140         }
 141
 142 #define BUS_DEFINE_SET_TRANSIENT_PARSE(function, type, parse)           \
 143         int bus_set_transient_##function(                               \
 144                         Unit *u,                                        \
 145                         const char *name,                               \
 146                         type *p,                                        \
 147                         sd_bus_message *message,                        \
 148                         UnitWriteFlags flags,                           \
 149                         sd_bus_error *error) {                          \
 150                                                                         \
 151                 const char *s;                                          \
 152                 type v;                                                 \
 153                 int r;                                                  \
 154                                                                         \
 155                 assert(p);                                              \
 156                                                                         \
 157                 r = sd_bus_message_read(message, "s", &s);              \
 158                 if (r < 0)                                              \
 159                         return r;                                       \
 160                                                                         \
 161                 v = parse(s);                                           \
 162                 if (v < 0)                                              \
 163                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 164                                                  "Invalid %s setting: %s", name, s); \
 165                                                                         \
 166                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 167                         *p = v;                                         \
 168                         unit_write_settingf(u, flags, name,             \
 169                                             "%s=%s", name, s);          \
 170                 }                                                       \
 171                                                                         \
 172                 return 1;                                               \
 173         }
 174
 175 #define BUS_DEFINE_SET_TRANSIENT_PARSE_PTR(function, type, parse)       \
 176         int bus_set_transient_##function(                               \
 177                         Unit *u,                                        \
 178                         const char *name,                               \
 179                         type *p,                                        \
 180                         sd_bus_message *message,                        \
 181                         UnitWriteFlags flags,                           \
 182                         sd_bus_error *error) {                          \
 183                                                                         \
 184                 const char *s;                                          \
 185                 type v;                                                 \
 186                 int r;                                                  \
 187                                                                         \
 188                 assert(p);                                              \
 189                                                                         \
 190                 r = sd_bus_message_read(message, "s", &s);              \
 191                 if (r < 0)                                              \
 192                         return r;                                       \
 193                                                                         \
 194                 r = parse(s, &v);                                       \
 195                 if (r < 0)                                              \
 196                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 197                                                  "Invalid %s setting: %s", name, s); \
 198                                                                         \
 199                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 200                         *p = v;                                         \
 201                         unit_write_settingf(u, flags, name,             \
 202                                             "%s=%s", name, strempty(s)); \
 203                 }                                                       \
 204                                                                         \
 205                 return 1;                                               \
 206         }
 207
 208 #define BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(function, check)     \
 209         int bus_set_transient_##function(                               \
 210                         Unit *u,                                        \
 211                         const char *name,                               \
 212                         char **p,                                       \
 213                         sd_bus_message *message,                        \
 214                         UnitWriteFlags flags,                           \
 215                         sd_bus_error *error) {                          \
 216                                                                         \
 217                 const char *v;                                          \
 218                 int r;                                                  \
 219                                                                         \
 220                 assert(p);                                              \
 221                                                                         \
 222                 r = sd_bus_message_read(message, "s", &v);              \
 223                 if (r < 0)                                              \
 224                         return r;                                       \
 225                                                                         \
 226                 if (!isempty(v) && !check(v))                           \
 227                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, \
 228                                                  "Invalid %s setting: %s", name, v); \
 229                                                                         \
 230                 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {                    \
 231                         r = free_and_strdup(p, empty_to_null(v));       \
 232                         if (r < 0)                                      \
 233                                 return r;                               \
 234                                                                         \
 235                         unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, \
 236                                             "%s=%s", name, strempty(v)); \
 237                 }                                                       \
 238                                                                         \
 239                 return 1;                                               \
 240         }
 241
 242 int bus_set_transient_mode_t(Unit *u, const char *name, mode_t *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 243 int bus_set_transient_unsigned(Unit *u, const char *name, unsigned *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 244 int bus_set_transient_user(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 245 int bus_set_transient_path(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 246 int bus_set_transient_string(Unit *u, const char *name, char **p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 247 int bus_set_transient_bool(Unit *u, const char *name, bool *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error);
 248 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);
 249 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) {
 250         return bus_set_transient_usec_internal(u, name, p, false, message, flags, error);
 251 }
 252 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) {
 253         return bus_set_transient_usec_internal(u, name, p, true, message, flags, error);
 254 }