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/* timezones.c
* Support for timezones in RainerScript.
*
* Copyright 2022 Attila Lakatos and Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* -or-
* see COPYING.ASL20 in the source distribution
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <ctype.h>
#include <stdint.h>
#include <errno.h>
#include "rsyslog.h"
#include "unicode-helper.h"
#include "errmsg.h"
#include "parserif.h"
#include "rainerscript.h"
#include "srUtils.h"
#include "rsconf.h"
static struct cnfparamdescr timezonecnfparamdescr[] = {
{ "id", eCmdHdlrString, CNFPARAM_REQUIRED},
{ "offset", eCmdHdlrGetWord, CNFPARAM_REQUIRED }
};
static struct cnfparamblk timezonepblk = {
CNFPARAMBLK_VERSION,
sizeof(timezonecnfparamdescr)/sizeof(struct cnfparamdescr),
timezonecnfparamdescr
};
/* Note: this function is NOT thread-safe!
* This is currently not needed as used only during
* initialization.
*/
static rsRetVal
addTimezoneInfo(rsconf_t *cnf, uchar *tzid, char offsMode, int8_t offsHour, int8_t offsMin)
{
DEFiRet;
tzinfo_t *newti;
CHKmalloc(newti = realloc(cnf->timezones.tzinfos, (cnf->timezones.ntzinfos+1)*sizeof(tzinfo_t)));
if((newti[cnf->timezones.ntzinfos].id = strdup((char*)tzid)) == NULL) {
free(newti);
DBGPRINTF("addTimezoneInfo: strdup failed with OOM\n");
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
newti[cnf->timezones.ntzinfos].offsMode = offsMode;
newti[cnf->timezones.ntzinfos].offsHour = offsHour;
newti[cnf->timezones.ntzinfos].offsMin = offsMin;
++cnf->timezones.ntzinfos, cnf->timezones.tzinfos = newti;
finalize_it:
RETiRet;
}
void
glblProcessTimezone(struct cnfobj *o)
{
struct cnfparamvals *pvals;
uchar *id = NULL;
uchar *offset = NULL;
char offsMode;
int8_t offsHour;
int8_t offsMin;
int i;
pvals = nvlstGetParams(o->nvlst, &timezonepblk, NULL);
if(pvals == NULL) {
LogError(0, RS_RET_MISSING_CNFPARAMS, "error processing timezone "
"config parameters");
goto done;
}
if(Debug) {
dbgprintf("timezone param blk after glblProcessTimezone:\n");
cnfparamsPrint(&timezonepblk, pvals);
}
for(i = 0 ; i < timezonepblk.nParams ; ++i) {
if(!pvals[i].bUsed)
continue;
if(!strcmp(timezonepblk.descr[i].name, "id")) {
id = (uchar*) es_str2cstr(pvals[i].val.d.estr, NULL);
} else if(!strcmp(timezonepblk.descr[i].name, "offset")) {
offset = (uchar*) es_str2cstr(pvals[i].val.d.estr, NULL);
} else {
dbgprintf("glblProcessTimezone: program error, non-handled "
"param '%s'\n", timezonepblk.descr[i].name);
}
}
/* note: the following two checks for NULL are not strictly necessary
* as these are required parameters for the config block. But we keep
* them to make the clang static analyzer happy, which also helps
* guard against logic errors.
*/
if(offset == NULL) {
parser_errmsg("offset parameter missing (logic error?), timezone config ignored");
goto done;
}
if(id == NULL) {
parser_errmsg("id parameter missing (logic error?), timezone config ignored");
goto done;
}
if( strlen((char*)offset) != 6
|| !(offset[0] == '-' || offset[0] == '+')
|| !(isdigit(offset[1]) && isdigit(offset[2]))
|| offset[3] != ':'
|| !(isdigit(offset[4]) && isdigit(offset[5]))
) {
parser_errmsg("timezone offset has invalid format. Must be +/-hh:mm, e.g. \"-07:00\".");
goto done;
}
offsHour = (offset[1] - '0') * 10 + offset[2] - '0';
offsMin = (offset[4] - '0') * 10 + offset[5] - '0';
offsMode = offset[0];
if(offsHour > 12 || offsMin > 59) {
parser_errmsg("timezone offset outside of supported range (hours 0..12, minutes 0..59)");
goto done;
}
addTimezoneInfo(loadConf, id, offsMode, offsHour, offsMin);
done:
cnfparamvalsDestruct(pvals, &timezonepblk);
free(id);
free(offset);
}
/* comparison function for qsort() and string array compare
* this is for the string lookup table type
*/
static int
qs_arrcmp_tzinfo(const void *s1, const void *s2)
{
return strcmp(((tzinfo_t*)s1)->id, ((tzinfo_t*)s2)->id);
}
void sortTimezones(rsconf_t *cnf)
{
if (cnf->timezones.ntzinfos > 0) {
qsort(cnf->timezones.tzinfos, cnf->timezones.ntzinfos,
sizeof(tzinfo_t), qs_arrcmp_tzinfo);
}
}
void
displayTimezones(rsconf_t *cnf)
{
if(!Debug)
return;
for(int i = 0 ; i < cnf->timezones.ntzinfos ; ++i)
dbgprintf("tzinfo: '%s':%c%2.2d:%2.2d\n",
cnf->timezones.tzinfos[i].id, cnf->timezones.tzinfos[i].offsMode,
cnf->timezones.tzinfos[i].offsHour, cnf->timezones.tzinfos[i].offsMin);
}
static int
bs_arrcmp_tzinfo(const void *s1, const void *s2)
{
return strcmp((char*)s1, (char*)((tzinfo_t*)s2)->id);
}
/* returns matching timezone info or NULL if no entry exists */
tzinfo_t*
glblFindTimezone(rsconf_t *cnf, char *id)
{
return (tzinfo_t*) bsearch(
id, cnf->timezones.tzinfos, cnf->timezones.ntzinfos, sizeof(tzinfo_t), bs_arrcmp_tzinfo);
}
static void
freeTimezone(tzinfo_t *tzinfo)
{
free(tzinfo->id);
}
void
freeTimezones(rsconf_t *cnf)
{
for(int i = 0; i < cnf->timezones.ntzinfos ; ++i)
freeTimezone(&cnf->timezones.tzinfos[i]);
if (cnf->timezones.ntzinfos > 0)
free(cnf->timezones.tzinfos);
cnf->timezones.tzinfos = NULL;
}
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