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/* This file is part of cputemp2maxfreq.
Copyright (C) 2023-2024 pa4wdh
cputemp2maxfreq 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 3 of the License , or
(at your option) any later version.
cputemp2maxfreq 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 cputemp2maxfreq; see the file COPYING. If not, see
<http://www.gnu.org/licenses>.
*/
#include <stdarg.h>
#include <stdio.h>
#include <syslog.h>
#include <sys/time.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include "cputemp2maxfreq.h"
#include "debug.h"
extern struct s_config config;
extern struct s_cpudata cpudata;
// The logger_* functions are not called directly. They are set by argparse in
// the config.logger function pointer.
// No logging at all
void logger_none(char *format,...) { }
// Logging to stdout
void logger_stdout(char *format,...)
{
va_list args;
struct timeval systime;
struct tm *systime_tm;
char timestring[255];
time_t unixtime;
if (config.use_unixtime==0)
{
gettimeofday(&systime,NULL);
systime_tm=localtime(&systime.tv_sec);
strftime(timestring,sizeof(timestring),"%F %T",systime_tm);
printf("%s: ",timestring);
} else {
unixtime=time(NULL);
printf("%ld: ",unixtime);
}
va_start(args,format);
vprintf(format,args);
va_end(args);
putchar(10);
}
// Logging to syslog
void logger_syslog(char *format,...)
{
va_list args;
va_start(args,format);
vsyslog(LOG_DAEMON||LOG_CRIT,format,args);
va_end(args);
}
// Logging to kernel log buffer (/dev/kmsg)
void logger_kmsg(char *format,...)
{
va_list args;
FILE *kmsg;
char buffer[255];
kmsg=fopen("/dev/kmsg","w");
if (kmsg!=NULL)
{
fprintf(kmsg,"cputemp2maxfreq: ");
va_start(args,format);
vfprintf(kmsg,format,args);
va_end(args);
putc(10,kmsg);
fclose(kmsg);
} else {
va_start(args,format);
vsnprintf(buffer,sizeof(buffer),format,args);
va_end(args);
strcpy(config.logger_name,"stdout");
config.logger=&logger_stdout;
config.logger("Failed to open /dev/kmsg, falling back to stdout logging");
config.logger(buffer);
}
}
// CSV logging fields:
// 1: Timestamp
// 2: CPU Minimum frequency
// 3: CPU Maximum frequency
// 4: CPU Current frequency
// 5: CPU Temperature
// 6: Target temperature
// 7: Scaling maximum frequency before increase/decrease
void csvlog_init()
{
int exists;
DEBUG1_LOG("Started\n");
exists=access(config.csvlog,F_OK);
DEBUG1_LOG("File %s exists: %d\n",config.csvlog,exists);
if ((exists!=0) || (config.csvoverwrite==1))
{
DEBUG1_LOG("Creating/overwriting CSV file\n");
config.csvfile=fopen(config.csvlog,"w");
fputs("\"timestamp\","
"\"CPU Minumum frequency\","
"\"CPU Maximum frequency\","
"\"CPU Current frequency\","
"\"CPU Temperature\","
"\"Target Temperature\","
"\"Scaling maximum frequency\"\n",config.csvfile);
fflush(config.csvfile);
} else {
DEBUG1_LOG("Appending to CSV file\n");
config.csvfile=fopen(config.csvlog,"a");
}
}
// Write a single line of CSV data
void csvlog_write()
{
struct timeval systime;
struct tm *systime_tm;
char timestring[255];
time_t unixtime;
DEBUG1_LOG("Writing data series to CSV file\n");
if (config.use_unixtime==0)
{
gettimeofday(&systime,NULL);
systime_tm=localtime(&systime.tv_sec);
strftime(timestring,sizeof(timestring),"\"%F %T\"",systime_tm);
} else {
unixtime=time(NULL);
snprintf(timestring,sizeof(timestring),"%ld",unixtime);
}
fprintf(config.csvfile,"%s,\"%ld\",\"%ld\",\"%ld\",\"%ld\",\"%ld\",\"%ld\"\n",timestring,cpudata.min_freq,cpudata.max_freq,cpudata.cur_freq,cpudata.cur_temp/1000,config.max_temp/1000,cpudata.scale_max);
fflush(config.csvfile);
}
// Close the CSV file
void csvlog_close()
{
DEBUG1_LOG("Closing CSV file\n");
fclose(config.csvfile);
config.csvfile=NULL;
}
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