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/*
* Copyright (c) 2022 Balazs Scheidler <bazsi77@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "tf-format-date.h"
#include "timeutils/conv.h"
/*
* $(format-date [options] format-string [timestamp])
*
* $(format-date) takes a timestamp in the DATETIME representation and
* formats it according to an strftime() format string. The DATETIME
* representation in syslog-ng is a UNIX timestamp formatted as a decimal
* number, with an optional fractional part, where the seconds and the
* fraction of seconds are separated by a dot.
*
* If the timestamp argument is missing, the timestamp of the message is
* used.
*
* Options:
* --time-zone <TZstring>
*/
typedef struct _TFFormatDate
{
TFSimpleFuncState super;
TimeZoneInfo *time_zone_info;
gchar *format;
} TFFormatDate;
static gboolean
tf_format_date_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent, gint argc, gchar *argv[],
GError **error)
{
TFFormatDate *state = (TFFormatDate *) s;
gchar *time_zone = NULL;
GOptionContext *ctx;
GOptionEntry format_date_options[] =
{
{ "time-zone", 'Z', 0, G_OPTION_ARG_STRING, &time_zone, NULL, NULL },
{ NULL }
};
gboolean result = FALSE;
ctx = g_option_context_new("format-date");
g_option_context_add_main_entries(ctx, format_date_options, NULL);
if (!g_option_context_parse(ctx, &argc, &argv, error))
{
g_option_context_free(ctx);
goto exit;
}
g_option_context_free(ctx);
if (time_zone)
{
state->time_zone_info = time_zone_info_new(time_zone);
if (!state->time_zone_info)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"$(format-date): Error loading timezone information for %s", time_zone);
goto exit;
}
}
if (argc > 1)
{
/* take off format string if that our next argument */
state->format = g_strdup(argv[1]);
/* fill up slot in argv array */
argv[1] = argv[0];
argv++;
argc--;
}
/* skip the extracted format argument */
if (!tf_simple_func_prepare(self, state, parent, argc, argv, error))
{
goto exit;
}
result = TRUE;
exit:
/* glib supplies us with duplicated strings that we are responsible for! */
g_free(time_zone);
return result;
}
static void
tf_format_date_call(LogTemplateFunction *self, gpointer s, const LogTemplateInvokeArgs *args, GString *result,
LogMessageValueType *type)
{
TFFormatDate *state = (TFFormatDate *) s;
UnixTime ut;
*type = LM_VT_STRING;
if (state->super.argc != 0)
{
const gchar *ts = args->argv[0]->str;
if (!type_cast_to_datetime_unixtime(ts, -1, &ut, NULL))
{
ut.ut_sec = 0;
ut.ut_usec = 0;
ut.ut_gmtoff = -1;
}
}
else
{
ut = args->messages[0]->timestamps[LM_TS_STAMP];
}
WallClockTime wct;
gint tz_override = state->time_zone_info ? time_zone_info_get_offset(state->time_zone_info, ut.ut_sec) : -1;
convert_unix_time_to_wall_clock_time_with_tz_override(&ut, &wct, tz_override);
gchar buf[64];
gint len = strftime(buf, sizeof(buf), state->format, &wct.tm);
if (len > 0)
g_string_append_len(result, buf, len);
}
static void
tf_format_date_free_state(gpointer s)
{
TFFormatDate *state = (TFFormatDate *) s;
g_free(state->format);
if (state->time_zone_info)
time_zone_info_free(state->time_zone_info);
tf_simple_func_free_state(&state->super);
}
TEMPLATE_FUNCTION(TFFormatDate, tf_format_date, tf_format_date_prepare, tf_simple_func_eval, tf_format_date_call,
tf_format_date_free_state, NULL);
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