<para><function>sd_journal_get_data()</function>
returns 0 on success or a negative errno-style error
code. If the current entry does not include the
<para><function>sd_journal_get_data()</function>
returns 0 on success or a negative errno-style error
code. If the current entry does not include the
returned. <function>sd_journal_enumerate_data()</function>
returns a positive integer if the next field has been
read, 0 when no more fields are known, or a negative
returned. <function>sd_journal_enumerate_data()</function>
returns a positive integer if the next field has been
read, 0 when no more fields are known, or a negative
<function>sd_journal_set_data_threshold()</function>
and
<function>sd_journal_get_data_threshold()</function>
<function>sd_journal_set_data_threshold()</function>
and
<function>sd_journal_get_data_threshold()</function>