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Fan-Control-Daemon
Commit 10788141 authored by Daniel Graziotin's avatar Daniel Graziotin
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Fixes #10

parent a6cc7a45
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Showing with 559 additions and 345 deletions
README.md
View file @ 10788141
......@@ -24,6 +24,11 @@ Compile with
Manually compile with
gcc -o bin/mbpfan src/mbpfan.c -lm
Run The Tests (Recommended)
---------------------------
It is recommended to run the tests before installing the program
sudo ./bin/mbpfan -t
Install Instructions
--------------------
......
src/daemon.c
View file @ 10788141
......@@ -29,23 +29,29 @@
#include "mbpfan.h"
#include "global.h"
int write_pid(int pid){
int write_pid(int pid)
{
FILE *file = NULL;
file = fopen(program_pid, "w");
if(file != NULL) {
if(file != NULL)
{
fprintf(file, "%d", pid);
fclose(file);
return 1;
}else{
}
else
{
return 0;
}
}
int read_pid(){
int read_pid()
{
FILE *file = NULL;
int pid = -1;
file = fopen(program_pid, "r");
if(file != NULL) {
if(file != NULL)
{
fscanf(file, "%d", &pid);
fclose(file);
return pid;
......@@ -53,7 +59,8 @@ int read_pid(){
return -1;
}
int delete_pid(){
int delete_pid()
{
return remove(program_pid);
}
......@@ -61,7 +68,8 @@ int delete_pid(){
void signal_handler(int signal)
{
switch(signal) {
switch(signal)
{
case SIGHUP:
//TODO: restart myself
syslog(LOG_WARNING, "Received SIGHUP signal.");
......@@ -96,10 +104,13 @@ void go_daemon(void (*fan_control)())
syslog(LOG_INFO, "%s starting up", program_name);
// Setup syslog logging - see SETLOGMASK(3)
if(verbose) {
if(verbose)
{
setlogmask(LOG_UPTO(LOG_DEBUG));
openlog(program_name, LOG_CONS | LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_USER);
} else {
}
else
{
setlogmask(LOG_UPTO(LOG_INFO));
openlog(program_name, LOG_CONS, LOG_USER);
}
......@@ -108,13 +119,16 @@ void go_daemon(void (*fan_control)())
pid_t pid_slave;
pid_t sid_slave;
if (daemonize) {
if (daemonize)
{
pid_slave = fork();
if (pid_slave < 0) {
if (pid_slave < 0)
{
exit(EXIT_FAILURE);
}
if (pid_slave > 0) {
if (pid_slave > 0)
{
// kill the father
exit(EXIT_SUCCESS);
}
......@@ -123,11 +137,13 @@ void go_daemon(void (*fan_control)())
// new sid_slave for the child process
sid_slave = setsid();
if (sid_slave < 0) {
if (sid_slave < 0)
{
exit(EXIT_FAILURE);
}
if ((chdir("/")) < 0) {
if ((chdir("/")) < 0)
{
exit(EXIT_FAILURE);
}
......@@ -142,26 +158,36 @@ void go_daemon(void (*fan_control)())
int current_pid = getpid();
if (read_pid() == -1){
if (verbose){
if (read_pid() == -1)
{
if (verbose)
{
printf("Writing a new .pid file with value %d at: %s", current_pid, program_pid);
syslog(LOG_INFO, "Writing a new .pid file with value %d at: %s", current_pid, program_pid);
}
if (write_pid(current_pid) == 0){
if (write_pid(current_pid) == 0)
{
syslog(LOG_ERR, "Can not create a .pid file at: %s. Aborting", program_pid);
if (verbose){
if (verbose)
{
printf("ERROR: Can not create a .pid file at: %s. Aborting", program_pid);
}
exit(EXIT_FAILURE);
}else{
if (verbose){
}
else
{
if (verbose)
{
printf("Successfully written a new .pid file with value %d at: %s", current_pid, program_pid);
syslog(LOG_INFO, "Successfully written a new .pid file with value %d at: %s", current_pid, program_pid);
}
}
}else{
}
else
{
syslog(LOG_ERR, "A previously created .pid file exists at: %s. Aborting", program_pid);
if (verbose){
if (verbose)
{
printf("ERROR: a previously created .pid file exists at: %s.\n Aborting\n", program_pid);
}
exit(EXIT_FAILURE);
......@@ -170,7 +196,8 @@ void go_daemon(void (*fan_control)())
fan_control();
if(daemonize){
if(daemonize)
{
syslog(LOG_INFO, "%s daemon exiting", program_name);
}
......
src/daemon.h
View file @ 10788141
......@@ -36,7 +36,7 @@ int read_pid();
* Return TRUE on success
* Return FALSE otherwise
*/
int delete_pid();
int delete_pid();
/**
* ...handles signals :-)
......
src/main.c
View file @ 10788141
......@@ -19,6 +19,7 @@
#include "mbpfan.h"
#include "daemon.h"
#include "global.h"
#include "minunit.h"
int daemonize = 1;
int verbose = 0;
......@@ -28,22 +29,28 @@ const char *program_pid = "/var/run/mbpfan.pid";
void print_usage(int argc, char *argv[])
{
if (argc >=1) {
if (argc >=1)
{
printf("Usage: %s OPTION(S) \n", argv[0]);
printf("Options:\n");
printf("\t-h Show this help screen\n");
printf("\t-f Run in foreground\n");
printf("\t-t Run the tests\n");
printf("\t-v Be (a lot) verbose\n");
printf("\n");
}
}
int main(int argc, char *argv[])
{
int c;
while( (c = getopt(argc, argv, "hfv|help")) != -1) {
switch(c) {
while( (c = getopt(argc, argv, "hftv|help")) != -1)
{
switch(c)
{
case 'h':
print_usage(argc, argv);
exit(0);
......@@ -51,6 +58,10 @@ int main(int argc, char *argv[])
case 'f':
daemonize = 0;
break;
case 't':
tests();
exit(0);
break;
case 'v':
verbose = 1;
break;
......
src/mbpfan.c
View file @ 10788141
......@@ -55,7 +55,8 @@ int max_temp = 86; // do not set it > 90
int polling_interval = 7;
struct s_sensors {
struct s_sensors
{
char* path;
char* fan_min_path;
char* fan_man_path;
......@@ -79,7 +80,8 @@ t_sensors *retrieve_sensors()
sprintf(number,"%d",0);
int i = 0;
for(i = 0; i<10; i++) {
for(i = 0; i<10; i++)
{
path = (char*) malloc(sizeof( char ) * path_size);
sprintf(number,"%d",i);
......@@ -90,17 +92,22 @@ t_sensors *retrieve_sensors()
FILE *file = fopen(path, "r");
if(file != NULL) {
if(file != NULL)
{
s = (t_sensors *) malloc( sizeof( t_sensors ) );
s->path = (char *) malloc(sizeof( char ) * path_size);
strcpy(s->path, path);
fscanf(file, "%d", &s->temperature);
if (sensors_head == NULL) {
if (sensors_head == NULL)
{
sensors_head = s;
sensors_head->next = NULL;
} else {
}
else
{
t_sensors *tmp = sensors_head;
while (tmp->next != NULL) {
while (tmp->next != NULL)
{
tmp = tmp->next;
}
tmp->next = s;
......@@ -135,7 +142,8 @@ void find_fans(t_sensors* sensors)
int n_sensors = 0;
int n_fans = 0;
for(n_sensors = 0; n_sensors<10; n_sensors++) {
for(n_sensors = 0; n_sensors<10; n_sensors++)
{
path_min = (char*) malloc(sizeof( char ) * path_min_size);
path_min[0] = '\0';
path_man = (char*) malloc(sizeof( char ) * path_man_size);
......@@ -153,8 +161,10 @@ void find_fans(t_sensors* sensors)
FILE *file = fopen(path_min, "r");
if(file != NULL) {
if (tmp->path != NULL) {
if(file != NULL)
{
if (tmp->path != NULL)
{
tmp->fan_min_path = (char *) malloc(sizeof( char ) * path_min_size);
tmp->fan_man_path = (char *) malloc(sizeof( char ) * path_man_size);
}
......@@ -166,9 +176,11 @@ void find_fans(t_sensors* sensors)
}
}
if(verbose) {
if(verbose)
{
printf("Found %d: sensors and %d fans\n", n_sensors, n_fans);
if(daemonize) {
if(daemonize)
{
syslog(LOG_INFO, "Found %d: sensors and %d fans", n_sensors, n_fans);
}
}
......@@ -184,9 +196,11 @@ void set_fans_man(t_sensors *sensors)
t_sensors *tmp = sensors;
FILE *file;
while(tmp != NULL) {
while(tmp != NULL)
{
file = fopen(tmp->fan_man_path, "rw+");
if(file != NULL) {
if(file != NULL)
{
fprintf(file, "%d", 0);
fclose(file);
}
......@@ -199,10 +213,12 @@ t_sensors *refresh_sensors(t_sensors *sensors)
t_sensors *tmp = sensors;
while(tmp != NULL) {
while(tmp != NULL)
{
FILE *file = fopen(tmp->path, "r");
if(file != NULL) {
if(file != NULL)
{
fscanf(file, "%d", &tmp->temperature);
fclose(file);
}
......@@ -219,9 +235,11 @@ void set_fan_speed(t_sensors* sensors, int speed)
{
t_sensors *tmp = sensors;
FILE *file;
while(tmp != NULL) {
while(tmp != NULL)
{
file = fopen(tmp->fan_min_path, "rw+");
if(file != NULL) {
if(file != NULL)
{
fprintf(file, "%d", speed);
fclose(file);
}
......@@ -241,7 +259,8 @@ unsigned short get_temp(t_sensors* sensors)
unsigned short temp = 0;
t_sensors* tmp = sensors;
while(tmp != NULL) {
while(tmp != NULL)
{
sum_temp += tmp->temperature;
tmp = tmp->next;
}
......@@ -262,9 +281,11 @@ void mbpfan()
fan_speed = 2000;
set_fan_speed(sensors, fan_speed);
if(verbose) {
if(verbose)
{
printf("Sleeping for %d seconds\n", polling_interval);
if(daemonize) {
if(daemonize)
{
syslog(LOG_INFO, "Sleeping for %d seconds\n", polling_interval);
}
}
......@@ -276,42 +297,51 @@ void mbpfan()
step_down = (float)( max_fan_speed - min_fan_speed ) /
(float)( ( max_temp - low_temp ) * ( max_temp - low_temp + 1 ) / 2 );
while(1) {
while(1)
{
old_temp = new_temp;
new_temp = get_temp(sensors);
if(new_temp >= max_temp && fan_speed != max_fan_speed) {
if(new_temp >= max_temp && fan_speed != max_fan_speed)
{
fan_speed = max_fan_speed;
}
if(new_temp <= low_temp && fan_speed != min_fan_speed) {
if(new_temp <= low_temp && fan_speed != min_fan_speed)
{
fan_speed = min_fan_speed;
}
temp_change = new_temp - old_temp;
if(temp_change > 0 && new_temp > high_temp && new_temp < max_temp) {
if(temp_change > 0 && new_temp > high_temp && new_temp < max_temp)
{
steps = ( new_temp - high_temp ) * ( new_temp - high_temp + 1 ) / 2;
fan_speed = max( fan_speed, ceil(min_fan_speed + steps * step_up) );
}
if(temp_change < 0 && new_temp > low_temp && new_temp < max_temp) {
if(temp_change < 0 && new_temp > low_temp && new_temp < max_temp)
{
steps = ( max_temp - new_temp ) * ( max_temp - new_temp + 1 ) / 2;
fan_speed = min( fan_speed, floor(max_fan_speed - steps * step_down) );
}
if(verbose) {
if(verbose)
{
printf("Old Temp %d: New Temp: %d, Fan Speed: %d\n", old_temp, new_temp, fan_speed);
if(daemonize) {
if(daemonize)
{
syslog(LOG_INFO, "Old Temp %d: New Temp: %d, Fan Speed: %d\n", old_temp, new_temp, fan_speed);
}
}
set_fan_speed(sensors, fan_speed);
if(verbose) {
if(verbose)
{
printf("Sleeping for %d seconds\n", polling_interval);
if(daemonize) {
if(daemonize)
{
syslog(LOG_INFO, "Sleeping for %d seconds\n", polling_interval);
}
}
......
src/mbpfan.h
View file @ 10788141
......@@ -61,6 +61,11 @@ void find_fans(t_sensors *sensors);
*/
void set_fans_man(t_sensors *sensors);
/**
* Return average CPU temp in degrees (ceiling)
*/
unsigned short get_temp(t_sensors* sensors);
/**
* Main Program
*/
......
src/minunit.c 0 → 100644
View file @ 10788141
/* file minunit_example.c */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <limits.h>
#include "mbpfan.h"
#include "minunit.h"
int tests_run = 0;
struct s_sensors
{
char* path;
char* fan_min_path;
char* fan_man_path;
unsigned int temperature;
struct s_sensors *next;
};
typedef s_sensors t_sensors;
static char *test_sensor_paths()
{
t_sensors* sensors = retrieve_sensors();
mu_assert("No sensors found", sensors != NULL);
t_sensors* tmp = sensors;
while(tmp != NULL)
{
mu_assert("Sensor does not have a valid path", tmp->path != NULL);
if(tmp->path != NULL)
mu_assert("Sensor does not have valid temperature", tmp->temperature > 0);
tmp = tmp->next;
}
return 0;
}
static char *test_fan_paths()
{
t_sensors* sensors = retrieve_sensors();
mu_assert("No sensors found", sensors != NULL);
t_sensors* tmp = sensors;
int found_fan_path = 0;
while(tmp != NULL)
{
if(tmp->fan_min_path != NULL)
found_fan_path++;
tmp = tmp->next;
}
mu_assert("No fans found", found_fan_path != 0);
return 0;
}
unsigned time_seed()
{
time_t now = time ( 0 );
unsigned char *p = (unsigned char *)&now;
unsigned seed = 0;
size_t i;
for ( i = 0; i < sizeof now; i++ )
seed = seed * ( UCHAR_MAX + 2U ) + p[i];
return seed;
}
// nothing better than a horrible piece of code to
// stress a little bit the CPU
int stress(int n)
{
int f = n;
while (f > 0)
{
while(n > 0)
{
srand ( time_seed() );
n--;
}
f--;
n = f;
}
}
static char *test_get_temp()
{
t_sensors* sensors = retrieve_sensors();
mu_assert("No sensors found", sensors != NULL);
unsigned short temp_1 = get_temp(sensors);
mu_assert("Invalid Global Temperature Found", temp_1 > 1 && temp_1 < 150);
stress(2000);
unsigned short temp_2 = get_temp(sensors);
mu_assert("Invalid Higher temp test (if fan was already spinning high, this is not worrying)", temp_1 < temp_2);
return 0;
}
static char *all_tests()
{
mu_run_test(test_sensor_paths);
mu_run_test(test_fan_paths);
mu_run_test(test_get_temp);
return 0;
}
int tests()
{
printf("Starting the tests..\n");
printf("It is normal for them to take a bit to finish.\n");
char *result = all_tests();
if (result != 0)
{
printf("%s \n", result);
}
else
{
printf("ALL TESTS PASSED\n");
}
printf("Tests run: %d\n", tests_run);
return result != 0;
}
\ No newline at end of file
src/minunit.h 0 → 100644
View file @ 10788141
/**
* This is the MinUnit testing framework - http://www.jera.com/techinfo/jtns/jtn002.html
*/
#define mu_assert(message, test) do { if (!(test)) return message; } while (0)
#define mu_run_test(test) do { char *message = test(); tests_run++; \
if (message) return message; } while (0)
extern int tests_run;
static char *test_sensor_paths();
static char *test_fan_paths();
static char *test_get_temp();
static char *all_tests();
int tests();
\ No newline at end of file
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