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/*
* @licence app begin@
* SPDX license identifier: MPL-2.0
*
* Copyright (C) 2011-2015, BMW AG"
*
* This file is part of GENIVI Project DLT - Diagnostic Log and Trace.
*
* This Source Code Form is subject to the terms of the
* Mozilla Public License (MPL), v. 2.0.
* If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*
* For further information see http://www.genivi.org/.
* @licence end@
*/
/*!
* \author Alexander Wenzel <alexander.aw.wenzel@bmw.de>
*
* \copyright Copyright © 2015 BMW AG. \n
* License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.
*
* \file dlt_offline_trace.c
*/
/*******************************************************************************
** **
** SRC-MODULE: dlt_offline_trace.c **
** **
** TARGET : linux **
** **
** PROJECT : DLT **
** **
** AUTHOR : Alexander Wenzel Alexander.AW.Wenzel@bmw.de **
** **
** PURPOSE : **
** **
** REMARKS : **
** **
** PLATFORM DEPENDANT [yes/no]: yes **
** **
** TO BE CHANGED BY USER [yes/no]: no **
** **
*******************************************************************************/
/*******************************************************************************
** Author Identity **
********************************************************************************
** **
** Initials Name Company **
** -------- ------------------------- ---------------------------------- **
** aw Alexander Wenzel BMW **
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <dlt_offline_trace.h>
int dlt_offline_trace_create_new_file(DltOfflineTrace *trace) {
time_t t;
struct tm *tmp;
char outstr[200];
/* set filename */
t = time(NULL);
tmp = localtime(&t);
if (NULL == tmp) {
printf("dlt_offline_trace_create_new_file: pointer to tmp is NULL!");
return -1;
}
if (strftime(outstr, sizeof(outstr),"%Y%m%d_%H%M%S", tmp) == 0) {
}
snprintf(trace->filename,NAME_MAX + 1,"%s/dlt_offlinetrace_%s.dlt",trace->directory,outstr);
/* open DLT output file */
trace->ohandle = open(trace->filename,O_WRONLY|O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); /* mode: wb */
if (trace->ohandle == -1)
{
/* trace file cannot be opened */
printf("Offline trace file %s cannot be created\n",trace->filename);
return -1;
} /* if */
return 0; /* OK */
}
unsigned long dlt_offline_trace_get_total_size(DltOfflineTrace *trace) {
struct dirent *dp;
char filename[256];
unsigned long size = 0;
struct stat status;
/* go through all dlt files in directory */
DIR *dir = opendir(trace->directory);
while ((dp=readdir(dir)) != NULL) {
if(strstr(dp->d_name,".dlt"))
{
int res = snprintf(filename, sizeof(filename), "%s/%s",trace->directory,dp->d_name);
// if the total length of the string is greater than the buffer, silently forget it.
// snprintf: a return value of size or more means that the output was truncated
// if an output error is encountered, a negative value is returned.
if( (unsigned int)res<sizeof(filename) && res>0 )
{
if(0 == stat(filename,&status))
{
size += status.st_size;
}
else
printf("Offline trace file %s cannot be stat-ed",filename);
}
//else
//{
// dlt_log(3, "dlt_offline_trace_get_total_size: long filename ignored");
//}
}
}
closedir(dir);
/* return size */
return size;
}
int dlt_offline_trace_delete_oldest_file(DltOfflineTrace *trace) {
struct dirent *dp;
char filename[PATH_MAX+1];
char filename_oldest[PATH_MAX+1];
unsigned long size_oldest = 0;
struct stat status;
time_t time_oldest = 0;
filename[0] = 0;
filename_oldest[0] = 0;
/* go through all dlt files in directory */
DIR *dir = opendir(trace->directory);
while ((dp=readdir(dir)) != NULL) {
if(strstr(dp->d_name,".dlt")) {
int res = snprintf(filename, sizeof(filename), "%s/%s",trace->directory,dp->d_name);
// if the total length of the string is greater than the buffer, silently forget it.
// snprintf: a return value of size or more means that the output was truncated
// if an output error is encountered, a negative value is returned.
if( (unsigned int)res<sizeof(filename) && res>0 )
{
if(0 == stat(filename,&status))
{
if(time_oldest == 0 || status.st_mtime < time_oldest) {
time_oldest = status.st_mtime;
size_oldest = status.st_size;
strncpy(filename_oldest,filename,PATH_MAX);
filename_oldest[PATH_MAX]=0;
}
}
else
printf("Old offline trace file %s cannot be stat-ed",filename);
}
}
}
closedir(dir);
/* delete file */
if(filename_oldest[0]) {
if(remove(filename_oldest)) {
printf("Remove file %s failed!\n",filename_oldest);
return -1; /* ERROR */
}
}
else {
printf("No file to be removed!\n");
return -1; /* ERROR */
}
/* return size of deleted file*/
return size_oldest;
}
int dlt_offline_trace_check_size(DltOfflineTrace *trace) {
/* check size of complete offline trace */
while((int)dlt_offline_trace_get_total_size(trace) > (trace->maxSize-trace->fileSize))
{
/* remove oldest files as long as new file will not fit in completely into complete offline trace */
if(dlt_offline_trace_delete_oldest_file(trace)<0) {
return -1;
}
}
return 0; /* OK */
}
int dlt_offline_trace_init(DltOfflineTrace *trace,const char *directory,int fileSize,int maxSize) {
/* init parameters */
strncpy(trace->directory,directory,NAME_MAX);
trace->directory[NAME_MAX]=0;
trace->fileSize = fileSize;
trace->maxSize = maxSize;
/* check complete offlien trace size, remove old logs if needed */
dlt_offline_trace_check_size(trace);
return dlt_offline_trace_create_new_file(trace);
}
int dlt_offline_trace_write(DltOfflineTrace *trace,unsigned char *data1,int size1,unsigned char *data2,int size2,unsigned char *data3,int size3) {
if(trace->ohandle <= 0)
return -1;
/* check file size here */
if((lseek(trace->ohandle,0,SEEK_CUR)+size1+size2+size3)>=trace->fileSize)
{
/* close old file */
close(trace->ohandle);
trace->ohandle = -1;
/* check complete offline trace size, remove old logs if needed */
dlt_offline_trace_check_size(trace);
/* create new file */
dlt_offline_trace_create_new_file(trace);
}
/* write data into log file */
if(data1 && (trace->ohandle >= 0)) {
if(write(trace->ohandle,data1,size1)!=size1) {
printf("Offline trace write failed!\n");
return -1;
}
}
if(data2 && (trace->ohandle >= 0)) {
if(write(trace->ohandle,data2,size2)!=size2) {
printf("Offline trace write failed!\n");
return -1;
}
}
if(data3 && (trace->ohandle >= 0)) {
if(write(trace->ohandle,data3,size3)!=size3) {
printf("Offline trace write failed!\n");
return -1;
}
}
return 0; /* OK */
}
int dlt_offline_trace_free(DltOfflineTrace *trace) {
if(trace->ohandle <= 0)
return -1;
/* close last used log file */
close(trace->ohandle);
return 0; /* OK */
}
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