rgbtemp/src/rgbtemp.c

#include <stdio.h>
#include <stdlib.h> /* For exit() function */
#include <unistd.h> /* For sleep() function */
#include <signal.h>

unsigned int sleep(unsigned int seconds);

#define FALSE 0
#define TRUE  1

#define BLACK  "00000000 00000000 00000000" /* off */
#define WHITE  "FFFFFFFF FFFFFFFF FFFFFFFF" /* >2Fº */
#define CYAN   "00000000 FFFFFFFF FFFFFFFF" /* >30º */
#define BLUE   "00000000 00000000 FFFFFFFF" /* >40º */
#define GREEN  "00000000 FFFFFFFF 00000000" /* >50º */
#define YELLOW "FFFFFFFF FFFFFFFF 00000000" /* >60º */
#define ORANGE "FFFFFFFF 33333333 00000000" /* >70º */
#define RED    "FFFFFFFF 00000000 00000000" /* >80º */
#define PINK   "FFFFFFFF 00000000 FFFFFFFF" /* >90º */

char fileaddr[] = "/sys/class/hwmon/hwmon0/temp1_input";
int running = TRUE;

void set_color(int celsius) {
    /* printf("Los grados son: %i\n", celsius); */
    int exitstatus = 0;
    if      (celsius > 90000) { exitstatus = system("msi-rgb --base-port 4e --pulse " PINK); }
    else if (celsius > 80000) { exitstatus = system("msi-rgb --base-port 4e --pulse " RED); }
    else if (celsius > 70000) { exitstatus = system("msi-rgb --base-port 4e --pulse " ORANGE); }
    else if (celsius > 60000) { exitstatus = system("msi-rgb --base-port 4e --pulse " YELLOW); }
    else if (celsius > 50000) { exitstatus = system("msi-rgb --base-port 4e --pulse " GREEN); }
    else if (celsius > 40000) { exitstatus = system("msi-rgb --base-port 4e --pulse " BLUE); }
    else if (celsius > 30000) { exitstatus = system("msi-rgb --base-port 4e --pulse " CYAN); }
    else if (celsius > 20000) { exitstatus = system("msi-rgb --base-port 4e --pulse " WHITE); }
    else {                      exitstatus = system("msi-rgb --base-port 4e --pulse " BLACK); }

    if (exitstatus) running = FALSE;
}

void sig_handler(int signo)
{
    if (signo == SIGUSR1) {
        fprintf(stderr, "\nINFO: Received SIGUSR1\n");
        running = FALSE;
    }
    else if (signo == SIGTERM) {
        fprintf(stderr, "\nINFO: Received SIGTERM\n");
        running = FALSE;
    }
    else if (signo == SIGINT) {
        fprintf(stderr, "\nINFO: Received SIGINT\n");
        running = FALSE;
    }
    else if (signo == SIGKILL)
        fprintf(stderr, "\nINFO: Received SIGKILL\n");
    else if (signo == SIGSTOP)
        fprintf(stderr, "\nINFO: Received SIGSTOP\n");
    else
        fprintf(stderr, "\nINFO: Received: %d", signo);
}

int main() {
    int i;
    int cleanexit;
    int fscanf_ok;
    char c[8];
    FILE *fptr;

    if (signal(SIGUSR1, sig_handler) == SIG_ERR)
        fprintf(stderr, "WARNING: Can't catch SIGUSR1\n");
    if (signal(SIGTERM, sig_handler) == SIG_ERR)
        fprintf(stderr, "WARNING: Can't catch SIGTERM\n");
    if (signal(SIGINT, sig_handler) == SIG_ERR)
        fprintf(stderr, "WARNING: Can't catch SIGINT\n");
    /*if (signal(SIGKILL, sig_handler) == SIG_ERR)
        fprintf(stderr, "%s", "WARNING: Can't catch SIGKILL\n");
    if (signal(SIGSTOP, sig_handler) == SIG_ERR)
        fprintf(stderr, "%s", "WARNING: Can't catch SIGSTOP\n"); */

    while (running) {
    if ((fptr = fopen(fileaddr, "r")) == NULL) {
        fprintf(stderr, "ERROR: Opening file");
        /* Program exits if file pointer returns NULL. */
        exit(1);
    }

    /* Reads text until newline is encountered */
    fscanf_ok = fscanf(fptr, "%[^\n]", c);
    fclose(fptr);

    if (!fscanf_ok) { return 0; }

    i = atoi(c);
    set_color(i);
    sleep(2);
    }

    /* system("msi-rgb --disable --base-port 4e " WHITE);  */
    cleanexit = system("msi-rgb --base-port 4e " BLACK);  /* No pulsing */

    if (cleanexit) { return 1; }

    return 0;
}