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/*
* SNOOPY COMMAND LOGGER
*
* File: snoopy/datasource/datetime.c
*
* Copyright (c) 2015 Bostjan Skufca <bostjan@a2o.si>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* Includes order: from local to global
*/
#include "datetime.h"
#include "snoopy.h"
#include <errno.h>
#include <stdio.h>
#include <time.h>
/*
* SNOOPY DATA SOURCE: datetime
*
* Description:
* Returns current date and time in ISO 8601 forma.
*
* Params:
* result: pointer to string, to write result into
* arg: (ignored)
*
* Return:
* number of characters in the returned string, or SNOOPY_DATASOURCE_FAILURE
*/
int snoopy_datasource_datetime (char * const resultBuf, size_t resultBufSize, char const * const arg)
{
time_t curTime;
struct tm curLocalTimeBuf;
const struct tm *curLocalTime;
char const *formatToUse;
char timeBuffer[SNOOPY_DATASOURCE_DATETIME_sizeMaxWithNull];
// Get current time
if ((time_t) -1 == time(&curTime)) {
return snprintf(resultBuf, resultBufSize, "(error @ time(): %d)", errno);
}
// Convert to local time
curLocalTime = localtime_r(&curTime, &curLocalTimeBuf);
if (NULL == curLocalTime) {
return snprintf(resultBuf, resultBufSize, "(error @ localtime_r())");
}
// Determine the format to use
if (arg[0] != '\0') {
formatToUse = arg;
} else {
formatToUse = SNOOPY_DATASOURCE_DATETIME_defaultFormat;
}
// Format it
if (0 == strftime(timeBuffer, SNOOPY_DATASOURCE_DATETIME_sizeMaxWithNull, formatToUse, curLocalTime)) {
return snprintf(resultBuf, resultBufSize, "(error @ strftime())");
}
// Copy it
return snprintf(resultBuf, resultBufSize, "%s", timeBuffer);
}
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