dlt-system-processes.c

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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@
 */

/*******************************************************************************
**                                                                            **
**  SRC-MODULE: dlt-system-processes.c                                                  **
**                                                                            **
**  TARGET    : linux                                                         **
**                                                                            **
**  PROJECT   : DLT                                                           **
**                                                                            **
**  AUTHOR    : Lassi Marttala <lassi.lm.marttala@partner.bmw.de>             **
**              Alexander Wenzel Alexander.AW.Wenzel@bmw.de                   **
**                                                                            **
**  PURPOSE   :                                                               **
**                                                                            **
**  REMARKS   :                                                               **
**                                                                            **
**  PLATFORM DEPENDANT [yes/no]: yes                                          **
**                                                                            **
**  TO BE CHANGED BY USER [yes/no]: no                                        **
**                                                                            **
*******************************************************************************/


#include <pthread.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "dlt-system.h"

// Modes of sending
#define SEND_MODE_OFF  0
#define SEND_MODE_ONCE 1
#define SEND_MODE_ON   2

extern DltSystemThreads threads;

DLT_IMPORT_CONTEXT(dltsystem)
DLT_DECLARE_CONTEXT(procContext)

void send_process(LogProcessOptions const *popts, int n)
{
        DLT_LOG(dltsystem, DLT_LOG_DEBUG,
                        DLT_STRING("dlt-system-processes, send process info."));
        FILE * pFile;
        struct dirent *dp;
        char filename[PATH_MAX];
        char buffer[1024];
        int bytes;
        int found = 0;

        /* go through all process files in directory */
        DIR *dir = opendir("/proc");
        if(dir != NULL)
        {
                while ((dp=readdir(dir)) != NULL)
                {
                        if(isdigit(dp->d_name[0]))
                        {
                                buffer[0] = 0;
                                snprintf(filename,PATH_MAX, "/proc/%s/cmdline",dp->d_name);
                                pFile = fopen(filename, "r");
                                if(pFile != NULL)
                                {
                                        bytes = fread(buffer, 1, sizeof(buffer)-1, pFile);
                                        fclose(pFile);
                                }
                if((strcmp((*popts).Name[n], "*")==0) ||
                   (strcmp(buffer, (*popts).Name[n])==0))
                                {
                                        found = 1;
                    snprintf(filename,PATH_MAX, "/proc/%s/%s", dp->d_name,(*popts).Filename[n]);
                                        pFile = fopen(filename, "r");
                                        if(pFile != NULL)
                                        {
                                                bytes = fread(buffer, 1, sizeof(buffer)-1, pFile);
                                                fclose(pFile);

                                                if(bytes>0)
                                                {
                                                        buffer[bytes] = 0;
                            DLT_LOG(procContext, DLT_LOG_INFO, DLT_INT(atoi(dp->d_name)), DLT_STRING((*popts).Filename[n]), DLT_STRING(buffer));
                                                }
                                        }
                    if(strcmp((*popts).Name[n], "*") !=0)
                                                break;
                                }
                        }
                }
                closedir(dir);
        }
        else
        {
                DLT_LOG(dltsystem, DLT_LOG_ERROR,
                                DLT_STRING("dlt-system-processes, failed to open /proc."));
        }

        if(!found) {
            DLT_LOG(procContext, DLT_LOG_INFO, DLT_STRING("Process"), DLT_STRING((*popts).Name[n]),DLT_STRING("not running!"));
        }
}

void logprocess_thread(void *v_conf)
{
        DLT_LOG(dltsystem, DLT_LOG_DEBUG,
                        DLT_STRING("dlt-system-processes, in thread."));

        DltSystemConfiguration *conf = (DltSystemConfiguration *) v_conf;
        DLT_REGISTER_CONTEXT(procContext, conf->LogProcesses.ContextId, "Log Processes");

        int process_delays[DLT_SYSTEM_LOG_PROCESSES_MAX];
        int i;
        for(i = 0;i < conf->LogProcesses.Count;i++)
                process_delays[i] = conf->LogProcesses.TimeDelay[i];

        while(!threads.shutdown)
        {
                sleep(1);
                for(i = 0;i < conf->LogProcesses.Count;i++)
                {
                        if(conf->LogProcesses.Mode[i] == SEND_MODE_OFF)
                                continue;

                        if(process_delays[i] <= 0)
                        {
                send_process(&(conf->LogProcesses), i);
                                process_delays[i] = conf->LogProcesses.TimeDelay[i];
                                if(conf->LogProcesses.Mode[i] == SEND_MODE_ONCE)
                                        conf->LogProcesses.Mode[i] = SEND_MODE_OFF;
                        }
                        else
                        {
                                process_delays[i]--;
                        }
                }
        }
}

void start_logprocess(DltSystemConfiguration *conf)
{
        DLT_LOG(dltsystem, DLT_LOG_DEBUG,
                        DLT_STRING("dlt-system-processes, starting process log."));
        static pthread_attr_t t_attr;
        static pthread_t pt;
        pthread_create(&pt, &t_attr, (void *)logprocess_thread, conf);
        threads.threads[threads.count++] = pt;
}