A dwmstatus program, based on profil's dwmstatus

grayfox-dwmstatus.c

/* made by grayfox, inspired by profil-dwmstatus
**
** Compile with:
** gcc -Wall -pedantic -std=c99 -lX11 status.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <X11/Xlib.h>
static Display *dpy;
void setstatus(char *str) {
        XStoreName(dpy, DefaultRootWindow(dpy), str);
        XSync(dpy, False);
}
//float getfreq(char *file) {
//      FILE *fd;
//      char *freq; 
//      float ret;
//
//      freq = malloc(10);
//      fd = fopen(file, "r");
//      if(fd == NULL) {
//              fprintf(stderr, "Cannot open '%s' for reading.\n", file);
//              exit(1);
//      }
//
//      fgets(freq, 10, fd);
//      fclose(fd);
//
//      ret = atof(freq)/1000000;
//      free(freq);
//      return ret;
//}
void getnetstatus(char buf[18]) {
        FILE *fd;
        char tmp[5];
        
        fd = fopen("/sys/class/net/wlp2s0/operstate", "r");
        if(fd == NULL) {
                fprintf(stderr, "Cannot open /sys/class/net/wlp2s0/operstate.\n");
                exit(1);
        }
        fscanf(fd, "%4s", tmp);
        strcpy(buf, "W: ");
        strncat(buf, tmp, 4);
        
        fclose(fd);
        fopen("/sys/class/net/enp3s0/operstate", "r");
        if(fd == NULL) {
                fprintf(stderr, "Cannot open /sys/class/net/enp3s0/operstate.\n");
                exit(1);
        }
        fscanf(fd, "%4s", tmp);
        strcat(buf, " | E: ");
        strncat(buf, tmp, 4);
        
        fclose(fd);
}

char *getdatetime() {
        char *buf;
        time_t result;
        struct tm *resulttm;
        if((buf = malloc(sizeof(char)*65)) == NULL) {
                fprintf(stderr, "Cannot allocate memory for buf.\n");
                exit(1);
        }
        result = time(NULL);
        resulttm = localtime(&result);
        if(resulttm == NULL) {
                fprintf(stderr, "Error getting localtime.\n");
                exit(1);
        }
        if(!strftime(buf, sizeof(char)*65-1, "%a %b %d %H:%M:%S", resulttm)) {
                fprintf(stderr, "strftime is 0.\n");
                exit(1);
        }
        
        return buf;
}

int getbattery() {
        FILE *fd;
        int energy_now, energy_full, voltage_now;
        fd = fopen("/sys/class/power_supply/BAT1/charge_now", "r");
        if(fd == NULL) {
                fprintf(stderr, "Error opening charge_now.\n");
                return -1;
        }
        fscanf(fd, "%d", &energy_now);
        fclose(fd);
        fd = fopen("/sys/class/power_supply/BAT1/charge_full", "r");
        if(fd == NULL) {
                fprintf(stderr, "Error opening charge_full.\n");
                return -1;
        }
        fscanf(fd, "%d", &energy_full);
        fclose(fd);
        fd = fopen("/sys/class/power_supply/BAT1/voltage_now", "r");
        if(fd == NULL) {
                fprintf(stderr, "Error opening voltage_now.\n");
                return -1;
        }
        fscanf(fd, "%d", &voltage_now);
        fclose(fd);
        return ((float)energy_now * 1000 / (float)voltage_now) * 100 / ((float)energy_full * 1000 / (float)voltage_now);
}

int main(void) {
        char *status;
        //float cpu0, cpu1, cpu2, cpu3;
        char *datetime;
        char net[18];
        int bat1;
        if (!(dpy = XOpenDisplay(NULL))) {
                fprintf(stderr, "Cannot open display.\n");
                return 1;
        }
        if((status = malloc(200)) == NULL)
                exit(1);
        
        for (;;sleep(1)) {
                //cpu0 = getfreq("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
                //cpu1 = getfreq("/sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq");
                //cpu2 = getfreq("/sys/devices/system/cpu/cpu2/cpufreq/scaling_cur_freq");
                //cpu3 = getfreq("/sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq");
                datetime = getdatetime();
                bat1 = getbattery();
                getnetstatus(net);
                //snprintf(status, 200, "%0.2f, %0.2f, %0.2f, %0.2f | %d%% | %s", cpu0, cpu1, cpu2, cpu3, bat1, datetime);
                snprintf(status, 200, "%s | %d%% | %s", net, bat1, datetime);
                free(datetime);
                setstatus(status);
        }
        free(status);
        XCloseDisplay(dpy);
        return 0;
}