along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
-<refentry id="sd_bus_error">
+<refentry id="sd_bus_error" conditional="ENABLE_KDBUS">
<refentryinfo>
<title>sd_bus_error</title>
<refname>sd_bus_error_is_set</refname>
<refname>sd_bus_error_has_name</refname>
- <refpurpose>libsystemd-bus error handling</refpurpose>
+ <refpurpose>sd-bus error handling</refpurpose>
</refnamediv>
<refsynopsisdiv>
<refsect1>
<title>Description</title>
- <para><structname>sd_bus_error</structname> structure carries
- information for a <filename>libsystemd-bus</filename> error.
- Functions described below can be used to set and query fields in
- this structure. Field <structfield>name</structfield> contains a
+ <para>The <structname>sd_bus_error</structname> structure carries
+ information for a <filename>sd-bus</filename> error. The
+ functions described below can be used to set and query fields in
+ this structure. The <structfield>name</structfield> field contains a
short identifier of an error. It should follow the rules for error
names described in the D-Bus specification, subsection <ulink
url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names">Valid
<para><function>sd_bus_error_set</function> will return an
errno-like negative value returned based on parameter
<parameter>name</parameter> (see
- <citerefentry><refentrytitle>errno</refentrytitle><manvolnum>3</manvolnum></citerefentry>).
+ <citerefentry project='man-pages'><refentrytitle>errno</refentrytitle><manvolnum>3</manvolnum></citerefentry>).
Various well-known D-Bus errors are converted to specific values,
and the remaining ones to <constant>-ENXIO</constant>. Well-known
D-Bus error names are available as constants
<constant>SD_BUS_ERROR_FAILED</constant>, etc., listed above. If
- <parameter>name</parameter> is <constant>NULL</constant>, it is is
- assumed that no error occured, and 0 is returned. This means that
+ <parameter>name</parameter> is <constant>NULL</constant>, it is
+ assumed that no error occurred, and 0 is returned. This means that
this function may be conveniently used in a
<function>return</function> statement.</para>
<para>If <parameter>e</parameter> is not
<constant>NULL</constant>, <structfield>name</structfield> and
- <structfield>message</structfield> will be filled-in in the
+ <structfield>message</structfield> in the
<structname>sd_bus_error</structname> structure
- <parameter>e</parameter> points at. As described above,
+ <parameter>e</parameter> points at will be filled in. As described above,
<parameter>name</parameter> may be <constant>NULL</constant>,
which is treated as no error. Parameter
<parameter>message</parameter> may also be
<para><function>sd_bus_error_setf</function> is similar to
<function>sd_bus_error_set</function>, but takes a
- <citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ <citerefentry project='man-pages'><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
format string and corresponding arguments to generate
<structname>message</structname>.</para>
<para><function>sd_bus_error_set_errnof</function> is similar to
<function>sd_bus_error_set_errno</function>, but in addition to
<parameter>name</parameter>, takes a
- <citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ <citerefentry project='man-pages'><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
format and corresponding arguments.
<structfield>name</structfield> will be generated from
<parameter>format</parameter> and the arguments.</para>
<para><function>sd_bus_error_get_errno</function> is will convert
- <structname>e->name</structname> to an errno-like value
- using the same rules as <function>sd_bus_error_set</function>.
- </para>
+ <structname>e->name</structname> to an errno-like value using the
+ same rules as <function>sd_bus_error_set</function>. If
+ <parameter>e</parameter> is <constant>NULL</constant>, 0 will be
+ returned.</para>
<para><function>sd_bus_error_copy</function> will initialize
<parameter>dst</parameter> using the values in
<parameter>e</parameter>. If the strings in
<parameter>e</parameter> were set using
<function>sd_bus_set_error_const</function>, they will be shared.
- Otherwie they wil be copied.</para>
+ Otherwise, they will be copied.</para>
<para><function>sd_bus_error_is_set</function> will return
<constant>true</constant> if <parameter>e</parameter> is
<para><function>sd_bus_error_free</function> will destroy resources
held by <parameter>e</parameter>. The parameter itself will not
be deallocated, and must be
- <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>d
+ <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>d
by the caller if necessary.</para>
</refsect1>
<para><function>sd_bus_error_get_errno</function> returns
<constant>false</constant> when <parameter>e</parameter> is
<constant>NULL</constant>, and a positive errno value mapped from
- <parameter>e->name</parameter> otherwise.</para>
+ <parameter>e->name</parameter> otherwise.</para>
<para><function>sd_bus_error_copy</function> returns 0 or a
positive integer on success, and one of the negative error values
<para><function>sd_bus_error_is_set</function> returns
<constant>true</constant> when <parameter>e</parameter> and
- <parameter>e->name</parameter> are non-<constant>NULL</constant>,
+ <parameter>e->name</parameter> are non-<constant>NULL</constant>,
<constant>false</constant> otherwise.</para>
<para><function>sd_bus_error_has_name</function> returns
<constant>true</constant> when <parameter>e</parameter> is
- non-<constant>NULL</constant> and <parameter>e->name</parameter>
+ non-<constant>NULL</constant> and <parameter>e->name</parameter>
is equal to <parameter>name</parameter>,
<constant>false</constant> otherwise.</para>
</refsect1>
<para><function>sd_bus_set_error()</function> and other functions
described here are available as a shared library, which can be
compiled and linked to with the
- <constant>libsystemd-bus</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
file.</para>
</refsect1>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>errno</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>errno</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>strerror</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff