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| <div class="chapter"> |
| <div class="titlepage"><div><div><h2 class="title"> |
| <a name="running-gio-apps"></a>Running GIO applications</h2></div></div></div> |
| <p> |
| GIO inspects a few environment variables in addition to the |
| ones used by GLib. |
| </p> |
| <p><b><code class="envar">XDG_DATA_HOME</code>, <code class="envar">XDG_DATA_DIRS</code>. </b> |
| GIO uses these environment variables to locate MIME information. |
| For more information, see the <a class="ulink" href="http://freedesktop.org/Standards/shared-mime-info-spec" target="_top">Shared MIME-info Database</a> |
| and the <a class="ulink" href="http://freedesktop.org/Standards/basedir-spec" target="_top">Base Directory Specification</a>. |
| </p> |
| <p><b><code class="envar">GVFS_DISABLE_FUSE</code>. </b> |
| This variable can be set to keep <span class="type">Gvfs</span> from starting the fuse backend, |
| which may be unwanted or unnecessary in certain situations. |
| </p> |
| <p><b><code class="envar">GIO_USE_VFS</code>. </b> |
| This environment variable can be set to the name of a <a class="link" href="GVfs.html" title="GVfs"><span class="type">GVfs</span></a> |
| implementation to override the default for debugging purposes. |
| The <a class="link" href="GVfs.html" title="GVfs"><span class="type">GVfs</span></a> implementation for local files that is included in GIO |
| has the name "local", the implementation in the gvfs module has |
| the name "gvfs". Most commonly, system software will set this to "local" |
| to avoid having `GFile` APIs perform unnecessary DBus calls. |
| </p> |
| <p> |
| The following environment variables are only useful for debugging |
| GIO itself or modules that it loads. They should not be set in a |
| production environment. |
| </p> |
| <p><b><code class="envar">GIO_USE_FILE_MONITOR</code>. </b> |
| This variable can be set to the name of a <a class="link" href="GFileMonitor.html" title="GFileMonitor"><span class="type">GFileMonitor</span></a> |
| implementation to override the default for debugging purposes. |
| The <a class="link" href="GFileMonitor.html" title="GFileMonitor"><span class="type">GFileMonitor</span></a> implementation for local files that is included |
| in GIO on Linux has the name "inotify", others that are built |
| are built as modules (depending on the platform) are called |
| "fam" and "fen". |
| </p> |
| <p><b><code class="envar">GIO_USE_VOLUME_MONITOR</code>. </b> |
| This variable can be set to the name of a <a class="link" href="GVolumeMonitor.html" title="GVolumeMonitor"><span class="type">GVolumeMonitor</span></a> |
| implementation to override the default for debugging purposes. |
| The <a class="link" href="GVolumeMonitor.html" title="GVolumeMonitor"><span class="type">GVolumeMonitor</span></a> implementation for local files that is included |
| in GIO has the name "unix", the udisks2-based implementation in the |
| gvfs module has the name "udisks2". |
| </p> |
| <p><b><code class="envar">GIO_USE_TLS</code>. </b> |
| This variable can be set to the name of a <a class="link" href="GTlsBackend.html" title="GTlsBackend"><span class="type">GTlsBackend</span></a> |
| implementation to override the default for debugging purposes. |
| GIO does not include a <a class="link" href="GTlsBackend.html" title="GTlsBackend"><span class="type">GTlsBackend</span></a> implementation, the gnutls-based |
| implementation in the glib-networking module has the name "gnutls". |
| </p> |
| <p><b><code class="envar">GIO_MODULE_DIR</code>. </b> |
| When this environment variable is set to a path, GIO will load |
| modules from this alternate directory instead of the directory |
| built into GIO. This is useful when running tests, for example. |
| </p> |
| <p><b><code class="envar">GIO_EXTRA_MODULES</code>. </b> |
| When this environment variable is set to a path, or a set of |
| paths separated by a colon, GIO will attempt to load |
| additional modules from within the path. |
| </p> |
| <p><b><code class="envar">GSETTINGS_BACKEND</code>. </b> |
| This variable can be set to the name of a <a class="link" href="GSettingsBackend.html" title="GSettingsBackend"><span class="type">GSettingsBackend</span></a> |
| implementation to override the default for debugging purposes. |
| The memory-based implementation that is included in GIO has |
| the name "memory", the one in dconf has the name "dconf-settings". |
| </p> |
| <p><b><code class="envar">GSETTINGS_SCHEMA_DIR</code>. </b> |
| This variable can be set to the name of a directory that is |
| considered in addition to the <code class="filename">glib-2.0/schemas</code> |
| subdirectories of the XDG system data dirs when looking |
| for compiled schemas for <a class="link" href="GSettings.html" title="GSettings"><span class="type">GSettings</span></a>. |
| </p> |
| <p><b><code class="envar">DBUS_SYSTEM_BUS_ADDRESS</code>. </b> |
| This variable is consulted to find the address of the D-Bus system |
| bus. For the format of D-Bus addresses, see the D-Bus |
| <a class="ulink" href="http://dbus.freedesktop.org/doc/dbus-specification.html#addresses" target="_top">specification</a>. |
| |
| Setting this variable overrides platform-specific ways of determining |
| the system bus address. |
| </p> |
| <p><b><code class="envar">DBUS_SESSION_BUS_ADDRESS</code>. </b> |
| This variable is consulted to find the address of the D-Bus session bus. |
| |
| Setting this variable overrides platform-specific ways of determining |
| the session bus address. |
| </p> |
| <p><b><code class="envar">DBUS_STARTER_BUS_TYPE</code>. </b> |
| This variable is consulted to find out the 'starter' bus for an |
| application that has been started via D-Bus activation. The possible |
| values are 'system' or 'session'. |
| </p> |
| <p><b><code class="envar">G_DBUS_DEBUG</code>. </b> |
| This variable can be set to a list of debug options, which |
| cause GLib to print out different types of debugging |
| information when using the D-Bus routines. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">transport</span></p></td> |
| <td><p>Show IO activity (e.g. reads and writes)</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">message</span></p></td> |
| <td><p>Show all sent and received D-Bus messages</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">payload</span></p></td> |
| <td><p>Show payload for all sent and received D-Bus messages (implies message)</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">call</span></p></td> |
| <td><p>Trace <a class="link" href="GDBusConnection.html#g-dbus-connection-call" title="g_dbus_connection_call ()"><code class="function">g_dbus_connection_call()</code></a> and <a class="link" href="GDBusConnection.html#g-dbus-connection-call-sync" title="g_dbus_connection_call_sync ()"><code class="function">g_dbus_connection_call_sync()</code></a> API usage</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">signal</span></p></td> |
| <td><p>Show when a D-Bus signal is received</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">incoming</span></p></td> |
| <td><p>Show when an incoming D-Bus method call is received</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">return</span></p></td> |
| <td><p>Show when a reply is returned via the <a class="link" href="GDBusMethodInvocation.html" title="GDBusMethodInvocation"><span class="type">GDBusMethodInvocation</span></a> API</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">emission</span></p></td> |
| <td><p>Trace <a class="link" href="GDBusConnection.html#g-dbus-connection-emit-signal" title="g_dbus_connection_emit_signal ()"><code class="function">g_dbus_connection_emit_signal()</code></a> API usage</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">authentication</span></p></td> |
| <td><p>Show information about connection authentication</p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">address</span></p></td> |
| <td><p>Show information about D-Bus address lookups and autolaunching</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p> |
| The special value <code class="literal">all</code> can be used to turn |
| on all debug options. The special value |
| <code class="literal">help</code> can be used to print a list of |
| supported options to standard output. |
| </p> |
| <p><b><code class="envar">G_DBUS_COOKIE_SHA1_KEYRING_DIR</code>. </b> |
| Can be used to override the directory used to store the |
| keyring used in the <code class="literal">DBUS_COOKIE_SHA1</code> |
| authentication mechanism. Normally the directory used is |
| <code class="filename">.dbus-keyrings</code> in the user's home |
| directory. |
| </p> |
| <p><b><code class="envar">G_DBUS_COOKIE_SHA1_KEYRING_DIR_IGNORE_PERMISSION</code>. </b> |
| If set, the permissions of the directory used to store the |
| keyring used in the <code class="literal">DBUS_COOKIE_SHA1</code> |
| authentication mechanism won't be checked. Normally the |
| directory must be readable only by the user. |
| </p> |
| </div> |
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