337 lines
7.2 KiB
C
337 lines
7.2 KiB
C
/* See LICENSE file for copyright and license details. */
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/* global libraries */
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#include <alsa/asoundlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <X11/Xlib.h>
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/* local libraries */
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#include "config.h"
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/* functions */
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void setstatus(char *str);
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char *battery();
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char *cpu_temperature();
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char *cpu_usage();
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char *datetime();
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char *ram_usage();
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char *smprintf(char *fmt, ...);
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char *volume();
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char *wifi_signal();
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/* global variables */
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static Display *dpy;
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/* set statusbar (WM_NAME) */
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void
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setstatus(char *str)
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{
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XStoreName(dpy, DefaultRootWindow(dpy), str);
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XSync(dpy, False);
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}
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/* battery percentage */
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char *
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battery()
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{
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int battery_now, battery_full, battery_perc;
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FILE *fp;
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/* open battery now file */
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if (!(fp = fopen(batterynowfile, "r"))) {
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fprintf(stderr, "Error opening battery file.");
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exit(1);
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}
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/* read value */
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fscanf(fp, "%i", &battery_now);
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/* close battery now file */
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fclose(fp);
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/* open battery full file */
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if (!(fp = fopen(batteryfullfile, "r"))) {
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fprintf(stderr, "Error opening battery file.");
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exit(1);
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}
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/* read value */
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fscanf(fp, "%i", &battery_full);
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/* close battery full file */
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fclose(fp);
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/* calculate percent */
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battery_perc = battery_now / (battery_full / 100);
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/* return batt_perc as string */
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return smprintf("%d%%", battery_perc);
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}
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/* cpu temperature */
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char *
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cpu_temperature()
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{
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int temperature;
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FILE *fp;
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/* open temperature file */
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if (!(fp = fopen(tempfile, "r"))) {
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fprintf(stderr, "Could not open temperature file.\n");
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exit(1);
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}
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/* extract temperature */
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fscanf(fp, "%d", &temperature);
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/* close temperature file */
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fclose(fp);
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/* return temperature in degrees */
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return smprintf("%d°C", temperature / 1000);
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}
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/* cpu percentage */
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char *
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cpu_usage()
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{
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int cpu_perc;
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long double a[4], b[4];
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FILE *fp;
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/* open stat file */
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if (!(fp = fopen("/proc/stat","r"))) {
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fprintf(stderr, "Error opening stat file.");
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exit(1);
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}
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/* read values */
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fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
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/* close stat file */
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fclose(fp);
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/* wait a second (for avg values) */
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sleep(1);
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/* open stat file */
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if (!(fp = fopen("/proc/stat","r"))) {
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fprintf(stderr, "Error opening stat file.");
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exit(1);
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}
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/* read values */
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fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
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/* close stat file */
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fclose(fp);
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/* calculate avg in this second */
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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]));
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/* return cpu_perc as string */
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return smprintf("%d%%", cpu_perc);
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}
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/* date and time */
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char *
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datetime()
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{
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time_t tm;
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size_t bufsize = 19;
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char *buf = malloc(bufsize);
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/* get time in format */
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time(&tm);
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if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
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fprintf(stderr, "Strftime failed.\n");
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exit(1);
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}
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/* return time */
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return buf;
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}
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/* ram percentage */
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char *
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ram_usage()
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{
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int ram_perc;
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long total, free, available;
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FILE *fp;
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/* open meminfo file */
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if (!(fp = fopen("/proc/meminfo", "r"))) {
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fprintf(stderr, "Error opening meminfo file.");
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exit(1);
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}
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/* read the values */
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fscanf(fp, "MemTotal: %ld kB\n", &total);
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fscanf(fp, "MemFree: %ld kB\n", &free);
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fscanf(fp, "MemAvailable: %ld kB\n", &available);
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/* close meminfo file */
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fclose(fp);
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/* calculate percentage */
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ram_perc = 100 * (total - available) / total;
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/* return ram_perc as string */
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return smprintf("%d%%",ram_perc);
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}
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/* smprintf function */
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char *
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smprintf(char *fmt, ...)
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{
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va_list fmtargs;
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char *ret;
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int len;
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va_start(fmtargs, fmt);
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len = vsnprintf(NULL, 0, fmt, fmtargs);
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va_end(fmtargs);
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ret = malloc(++len);
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if (ret == NULL) {
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fprintf(stderr, "Malloc error.");
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exit(1);
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}
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va_start(fmtargs, fmt);
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vsnprintf(ret, len, fmt, fmtargs);
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va_end(fmtargs);
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return ret;
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}
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/* alsa volume percentage */
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char *
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volume()
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{
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int mute = 0;
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long vol = 0, max = 0, min = 0;
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/* get volume from alsa */
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snd_mixer_t *handle;
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snd_mixer_elem_t *pcm_mixer, *mas_mixer;
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snd_mixer_selem_id_t *vol_info, *mute_info;
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snd_mixer_open(&handle, 0);
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snd_mixer_attach(handle, soundcard);
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snd_mixer_selem_register(handle, NULL, NULL);
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snd_mixer_load(handle);
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snd_mixer_selem_id_malloc(&vol_info);
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snd_mixer_selem_id_malloc(&mute_info);
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snd_mixer_selem_id_set_name(vol_info, channel);
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snd_mixer_selem_id_set_name(mute_info, channel);
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pcm_mixer = snd_mixer_find_selem(handle, vol_info);
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mas_mixer = snd_mixer_find_selem(handle, mute_info);
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snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer,
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&min, &max);
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snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer,
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SND_MIXER_SCHN_MONO, &vol);
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snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO,
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&mute);
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if (vol_info)
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snd_mixer_selem_id_free(vol_info);
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if (mute_info)
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snd_mixer_selem_id_free(mute_info);
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if (handle)
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snd_mixer_close(handle);
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/* return the string (mute) */
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if (!mute)
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return "mute";
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else
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return smprintf("%d%%", (vol * 100) / max);
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}
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/* wifi percentage */
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char *
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wifi_signal()
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{
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int bufsize = 255;
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int strength;
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char buf[bufsize];
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char *datastart;
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char path_start[16] = "/sys/class/net/";
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char path_end[11] = "/operstate";
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char path[32];
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char status[5];
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FILE *fp;
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/* generate the path name */
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strcat(path, path_start);
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strcat(path, wificard);
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strcat(path, path_end);
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/* open wifi file */
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if(!(fp = fopen(path, "r"))) {
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fprintf(stderr, "Error opening wifi operstate file.");
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exit(1);
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}
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/* read the status */
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fgets(status, 5, fp);
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/* close wifi file */
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fclose(fp);
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/* check if interface down */
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if(strcmp(status, "up\n") != 0){
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return "n/a";
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}
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/* open wifi file */
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if (!(fp = fopen("/proc/net/wireless", "r"))) {
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fprintf(stderr, "Error opening wireless file.");
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exit(1);
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}
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/* extract the signal strength */
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fgets(buf, bufsize, fp);
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fgets(buf, bufsize, fp);
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fgets(buf, bufsize, fp);
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if ((datastart = strstr(buf, "wlp3s0:")) != NULL) {
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datastart = strstr(buf, ":");
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sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d",
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&strength);
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}
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/* close wifi file */
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fclose(fp);
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/* return strength in percent */
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return smprintf("%d%%", strength);
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}
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/* main function */
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int
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main()
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{
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char status[1024];
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/* open display */
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if (!(dpy = XOpenDisplay(0x0))) {
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fprintf(stderr, "Cannot open display!\n");
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exit(1);
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}
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/* return status every second */
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for (;;) {
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sprintf(status, FORMATSTRING, ARGUMENTS);
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setstatus(status);
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}
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/* close display */
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XCloseDisplay(dpy);
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/* exit successfully */
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return 0;
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}
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