/* See LICENSE file for copyright and license details. */ #include #include #include #include #include #include #include #include #include "config.h" char *smprintf(char *fmt, ...); void setstatus(char *str); char *wifi_signal(); char *battery(); char *cpu_usage(); char *cpu_temperature(); char *ram_usage(); char *volume(); char *datetime(); static Display *dpy; /* smprintf function */ char * smprintf(char *fmt, ...) { va_list fmtargs; char *ret; int len; va_start(fmtargs, fmt); len = vsnprintf(NULL, 0, fmt, fmtargs); va_end(fmtargs); ret = malloc(++len); if (ret == NULL) { fprintf(stderr, "Malloc error."); exit(1); } va_start(fmtargs, fmt); vsnprintf(ret, len, fmt, fmtargs); va_end(fmtargs); return ret; } /* set statusbar (WM_NAME) */ void setstatus(char *str) { XStoreName(dpy, DefaultRootWindow(dpy), str); XSync(dpy, False); } /* alsa volume percentage */ char * volume() { int mute = 0; long vol = 0, max = 0, min = 0; snd_mixer_t *handle; snd_mixer_elem_t *pcm_mixer, *mas_mixer; snd_mixer_selem_id_t *vol_info, *mute_info; snd_mixer_open(&handle, 0); snd_mixer_attach(handle, soundcard); snd_mixer_selem_register(handle, NULL, NULL); snd_mixer_load(handle); snd_mixer_selem_id_malloc(&vol_info); snd_mixer_selem_id_malloc(&mute_info); snd_mixer_selem_id_set_name(vol_info, channel); snd_mixer_selem_id_set_name(mute_info, channel); pcm_mixer = snd_mixer_find_selem(handle, vol_info); mas_mixer = snd_mixer_find_selem(handle, mute_info); snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max); snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol); snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute); if (vol_info) snd_mixer_selem_id_free(vol_info); if (mute_info) snd_mixer_selem_id_free(mute_info); if (handle) snd_mixer_close(handle); if (!mute) return "mute"; else return smprintf("%d%%", (vol * 100) / max); } /* cpu temperature */ char * cpu_temperature() { int temperature; FILE *fp; /* open temperature file */ if (!(fp = fopen(tempfile, "r"))) { fprintf(stderr, "Could not open temperature file.\n"); exit(1); } /* extract temperature, close file */ fscanf(fp, "%d", &temperature); fclose(fp); /* return temperature in degrees */ return smprintf("%d°C", temperature / 1000); } /* wifi percentage */ char * wifi_signal() { int bufsize = 255; int strength; char buf[bufsize]; char *datastart; char path_start[16] = "/sys/class/net/"; char path_end[11] = "/operstate"; char path[32]; FILE *fp; /* generate the path name */ strcat(path, path_start); strcat(path, wificard); strcat(path, path_end); /* open wifi file, extract status, close file */ if(!(fp = fopen(path, "r"))) { fprintf(stderr, "Error opening wifi operstate file."); exit(1); } char status[5]; fgets(status, 5, fp); fclose(fp); /* check if interface down */ if(strcmp(status, "up\n") != 0){ return "n/a"; } /* open wifi file */ if (!(fp = fopen("/proc/net/wireless", "r"))) { fprintf(stderr, "Error opening wireless file."); exit(1); } /* extract the signal strength and close the file */ fgets(buf, bufsize, fp); fgets(buf, bufsize, fp); fgets(buf, bufsize, fp); if ((datastart = strstr(buf, "wlp3s0:")) != NULL) { datastart = strstr(buf, ":"); sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &strength); } fclose(fp); /* return strength in percent */ return smprintf("%d%%", strength); } /* battery percentage */ char * battery() { int batt_now; int batt_full; int batt_perc; FILE *fp; /* open battery now file, extract and close */ if (!(fp = fopen(batterynowfile, "r"))) { fprintf(stderr, "Error opening battery file."); exit(1); } fscanf(fp, "%i", &batt_now); fclose(fp); /* extract battery full file, extract and close */ if (!(fp = fopen(batteryfullfile, "r"))) { fprintf(stderr, "Error opening battery file."); exit(1); } fscanf(fp, "%i", &batt_full); fclose(fp); /* calculate percent */ batt_perc = batt_now / (batt_full / 100); /* return percent */ return smprintf("%d%%", batt_perc); } /* date and time */ char * datetime() { time_t tm; size_t bufsize = 19; char *buf = malloc(bufsize); /* get time in format */ time(&tm); if(!strftime(buf, bufsize, timeformat, localtime(&tm))) { fprintf(stderr, "Strftime failed.\n"); exit(1); } /* return time */ return buf; } /* cpu percentage */ char * cpu_usage() { FILE *fp; long double a[4], b[4], cpu_perc; /* open stat file, read and close, do same after 1 second */ if (!(fp = fopen("/proc/stat","r"))) { fprintf(stderr, "Error opening stat file."); exit(1); } fscanf(fp,"%*s %Lf %Lf %Lf %Lf",&a[0],&a[1],&a[2],&a[3]); fclose(fp); sleep(1); if (!(fp = fopen("/proc/stat","r"))) { fprintf(stderr, "Error opening stat file."); exit(1); } fscanf(fp,"%*s %Lf %Lf %Lf %Lf",&b[0],&b[1],&b[2],&b[3]); fclose(fp); /* calculate average in 1 second */ cpu_perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3])); /* return avg cpu percentage */ return smprintf("%d%%", (int)cpu_perc); } /* ram percentage */ char * ram_usage() { FILE *fp; long total, free, available; int ram_perc; /* read meminfo file, extract and close */ if (!(fp = fopen("/proc/meminfo", "r"))) { fprintf(stderr, "Error opening meminfo file."); exit(1); } fscanf(fp, "MemTotal: %ld kB\n", &total); fscanf(fp, "MemFree: %ld kB\n", &free); fscanf(fp, "MemAvailable: %ld kB\n", &available); fclose(fp); /* calculate percentage */ ram_perc = 100 * (total - available) / total; /* return in percent */ return smprintf("%d%%",ram_perc); } int main() { char status[1024]; /* open display */ if (( dpy = XOpenDisplay(0x0)) == NULL ) { fprintf(stderr, "Cannot open display!\n"); exit(1); } /* return status every second */ for (;;) { sprintf(status, FORMATSTRING, ARGUMENTS); setstatus(status); } /* close display */ XCloseDisplay(dpy); /* exit successfully */ return 0; }