'\" t
.TH "SD_JOURNAL_ENUMERATE_FIELDS" "3" "" "elogind 246.9.1" "sd_journal_enumerate_fields"
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.SH "NAME"
sd_journal_enumerate_fields, sd_journal_restart_fields, SD_JOURNAL_FOREACH_FIELD \- Read used field names from the journal
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <elogind/sd\-journal\&.h>
.fi
.ft
.HP \w'int\ sd_journal_enumerate_fields('u
.BI "int sd_journal_enumerate_fields(sd_journal\ *" "j" ", const\ char\ **" "field" ");"
.HP \w'void\ sd_journal_restart_fields('u
.BI "void sd_journal_restart_fields(sd_journal\ *" "j" ");"
.HP \w'SD_JOURNAL_FOREACH_FIELD('u
.BI "SD_JOURNAL_FOREACH_FIELD(sd_journal\ *" "j" ", const\ char\ *" "field" ");"
.SH "DESCRIPTION"
.PP
As elogind can not open any systemd journals, the functions
\fBsd_journal_enumerate_fields()\fR,
\fBsd_journal_restart_fields()\fR
and the macro
\fBSD_JOURNAL_FOREACH_FIELD()\fR
do nothing\&.
.SH "RETURN VALUE"
.PP
\fBsd_journal_enumerate_fields()\fR
always returns 0\&.

\fBsd_journal_restart_fields()\fR
returns nothing\&.
.SH "SEE ALSO"
.PP

\fBelogind\fR(8),
\fBelogind.journal-fields\fR(7),

\fBsd_journal_open\fR(3),
\fBsd_journal_query_unique\fR(3),
\fBsd_journal_get_data\fR(3),
\fBsd_journal_add_match\fR(3)