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-rw-r--r--man/sd-id128.xml15
1 files changed, 14 insertions, 1 deletions
diff --git a/man/sd-id128.xml b/man/sd-id128.xml
index 5f24feff8e..2e29cf91cb 100644
--- a/man/sd-id128.xml
+++ b/man/sd-id128.xml
@@ -47,6 +47,7 @@
<refname>sd-id128</refname>
<refname>sd_id128_t</refname>
<refname>SD_ID128_MAKE</refname>
+ <refname>SD_ID128_MAKE_STR</refname>
<refname>SD_ID128_NULL</refname>
<refname>SD_ID128_CONST_STR</refname>
<refname>SD_ID128_FORMAT_STR</refname>
@@ -113,12 +114,24 @@
<para><function>SD_ID128_NULL</function> may be used to refer to the 128bit ID consisting of only NUL
bytes.</para>
+ <para><function>SD_ID128_MAKE_STR()</function> is similar to <function>SD_ID128_MAKE()</function>, but creates a
+ <type>const char*</type> expression that can be conveniently used in message formats and such:</para>
+
+ <programlisting>#include &lt;stdio.h&gt;
+#define SD_MESSAGE_COREDUMP_STR SD_ID128_MAKE_STR(fc,2e,22,bc,6e,e6,47,b6,b9,07,29,ab,34,a2,50,b1)
+
+int main(int argc, char **argv) {
+ puts("Match for coredumps: MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR);
+}
+ </programlisting>
+
+
<para><function>SD_ID128_CONST_STR()</function> may be used to
convert constant 128-bit IDs into constant strings for output. The
following example code will output the string
"fc2e22bc6ee647b6b90729ab34a250b1":</para>
<programlisting>int main(int argc, char *argv[]) {
- puts(SD_ID128_CONST_STR(SD_MESSAGE_COREDUMP));
+ puts("Match for coredumps: %s", SD_ID128_CONST_STR(SD_MESSAGE_COREDUMP));
}</programlisting>
<para><function>SD_ID128_FORMAT_STR()</function> and