D-Bus  1.16.2
dbus-misc.c
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-misc.c A few assorted public functions that don't fit elsewhere
3  *
4  * Copyright (C) 2006 Red Hat, Inc.
5  *
6  * SPDX-License-Identifier: AFL-2.1 OR GPL-2.0-or-later
7  *
8  * Licensed under the Academic Free License version 2.1
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  *
24  */
25 
26 #include <config.h>
27 #include "dbus-misc.h"
28 #include "dbus-internals.h"
29 #include "dbus-string.h"
30 #include <dbus/dbus-test-tap.h>
31 
75 char *
77 {
78  DBusString uuid;
79  char *s;
80 
81  s = NULL;
82 
83  if (!_dbus_string_init (&uuid))
84  {
86  return NULL;
87  }
88 
89  if (!_dbus_get_local_machine_uuid_encoded (&uuid, error))
90  {
91  _dbus_string_free (&uuid);
92  return NULL;
93  }
94 
95  if (!_dbus_string_steal_data (&uuid, &s))
96  {
98  _dbus_string_free (&uuid);
99  return NULL;
100  }
101  else
102  {
103  _dbus_string_free (&uuid);
104  return s;
105  }
106 
107 }
108 
124 char *
126 {
127  DBusError error = DBUS_ERROR_INIT;
128  char *s;
129 
130  s = dbus_try_get_local_machine_id (&error);
131 
132  /* The documentation says dbus_get_local_machine_id() only fails on OOM;
133  * this can actually also fail if the D-Bus installation is faulty
134  * (no UUID), but we have no good way to report that. Historically,
135  * _dbus_get_local_machine_uuid_encoded was responsible for issuing the
136  * warning; now we do that here. */
137  if (s == NULL)
138  {
140  _dbus_warn_check_failed ("%s", error.message);
141 
142  dbus_error_free (&error);
143  return NULL;
144  }
145 
146  return s;
147 }
148 
212 void
213 dbus_get_version (int *major_version_p,
214  int *minor_version_p,
215  int *micro_version_p)
216 {
217  if (major_version_p)
218  *major_version_p = DBUS_MAJOR_VERSION;
219  if (minor_version_p)
220  *minor_version_p = DBUS_MINOR_VERSION;
221  if (micro_version_p)
222  *micro_version_p = DBUS_MICRO_VERSION;
223 }
224 
225  /* End of public API */
dbus_bool_t dbus_error_has_name(const DBusError *error, const char *name)
Checks whether the error is set and has the given name.
Definition: dbus-errors.c:304
const char * message
public error message field
Definition: dbus-errors.h:53
#define NULL
A null pointer, defined appropriately for C or C++.
dbus_bool_t _dbus_get_local_machine_uuid_encoded(DBusString *uuid_str, DBusError *error)
Gets the hex-encoded UUID of the machine this function is executed on.
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack.
Definition: dbus-errors.h:64
void _dbus_warn_check_failed(const char *format,...)
Prints a "critical" warning to stderr when an assertion fails; differs from _dbus_warn primarily in t...
#define DBUS_MAJOR_VERSION
The COMPILE TIME major version of libdbus, that is, the "X" in "X.Y.Z", as an integer literal...
void dbus_error_free(DBusError *error)
Frees an error that's been set (or just initialized), then reinitializes the error as in dbus_error_i...
Definition: dbus-errors.c:213
void dbus_get_version(int *major_version_p, int *minor_version_p, int *micro_version_p)
Gets the DYNAMICALLY LINKED version of libdbus.
Definition: dbus-misc.c:213
#define DBUS_MICRO_VERSION
The COMPILE TIME micro version of libdbus, that is, the "Z" in "X.Y.Z", as an integer literal...
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:182
Object representing an exception.
Definition: dbus-errors.h:50
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
Definition: dbus-errors.c:356
#define DBUS_MINOR_VERSION
The COMPILE TIME minor version of libdbus, that is, the "Y" in "X.Y.Z", as an integer literal...
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as #_DBUS_STRING_I...
Definition: dbus-string.c:278
char * dbus_get_local_machine_id(void)
Obtains the machine UUID of the machine this process is running on.
Definition: dbus-misc.c:125
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
dbus_bool_t _dbus_string_steal_data(DBusString *str, char **data_return)
Like _dbus_string_get_data(), but removes the gotten data from the original string.
Definition: dbus-string.c:686
char * dbus_try_get_local_machine_id(DBusError *error)
Obtains the machine UUID of the machine this process is running on.
Definition: dbus-misc.c:76