src/core/dbus-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010 Lennart Poettering
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include "bus-util.h"
  22 #include "dbus-util.h"
  23 #include "parse-util.h"
  24 #include "path-util.h"
  25 #include "unit-printf.h"
  26 #include "user-util.h"
  27 #include "unit.h"
  28
  29 BUS_DEFINE_SET_TRANSIENT(mode_t, "u", uint32_t, mode_t, "%040o");
  30 BUS_DEFINE_SET_TRANSIENT(unsigned, "u", uint32_t, unsigned, "%" PRIu32);
  31 BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(user, valid_user_group_name_or_id);
  32 BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(path, path_is_absolute);
  33
  34 int bus_set_transient_string(
  35                 Unit *u,
  36                 const char *name,
  37                 char **p,
  38                 sd_bus_message *message,
  39                 UnitWriteFlags flags,
  40                 sd_bus_error *error) {
  41
  42         const char *v;
  43         int r;
  44
  45         assert(p);
  46
  47         r = sd_bus_message_read(message, "s", &v);
  48         if (r < 0)
  49                 return r;
  50
  51         if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
  52                 r = free_and_strdup(p, empty_to_null(v));
  53                 if (r < 0)
  54                         return r;
  55
  56                 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name,
  57                                     "%s=%s", name, strempty(v));
  58         }
  59
  60         return 1;
  61 }
  62
  63 int bus_set_transient_bool(
  64                 Unit *u,
  65                 const char *name,
  66                 bool *p,
  67                 sd_bus_message *message,
  68                 UnitWriteFlags flags,
  69                 sd_bus_error *error) {
  70
  71         int v, r;
  72
  73         assert(p);
  74
  75         r = sd_bus_message_read(message, "b", &v);
  76         if (r < 0)
  77                 return r;
  78
  79         if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
  80                 *p = v;
  81                 unit_write_settingf(u, flags, name, "%s=%s", name, yes_no(v));
  82         }
  83
  84         return 1;
  85 }
  86
  87 int bus_set_transient_usec_internal(
  88                 Unit *u,
  89                 const char *name,
  90                 usec_t *p,
  91                 bool fix_0,
  92                 sd_bus_message *message,
  93                 UnitWriteFlags flags,
  94                 sd_bus_error *error) {
  95
  96         uint64_t v;
  97         int r;
  98
  99         assert(p);
 100
 101         r = sd_bus_message_read(message, "t", &v);
 102         if (r < 0)
 103                 return r;
 104
 105         if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
 106                 char *n, ts[FORMAT_TIMESPAN_MAX];
 107
 108                 if (fix_0)
 109                         *p = v != 0 ? v: USEC_INFINITY;
 110                 else
 111                         *p = v;
 112
 113                 n = strndupa(name, strlen(name) - 4);
 114                 unit_write_settingf(u, flags, name, "%sSec=%s", n,
 115                                     format_timespan(ts, sizeof(ts), v, USEC_PER_MSEC));
 116         }
 117
 118         return 1;
 119 }