slstatus/slstatus.c
2016-03-17 19:12:47 +01:00

376 lines
8.9 KiB
C

/* See LICENSE file for copyright and license details. */
/* global libraries */
#include <alsa/asoundlib.h>
#include <fcntl.h>
#include <locale.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <time.h>
#include <unistd.h>
#include <X11/Xlib.h>
/* local headers */
#include "slstatus.h"
#include "config.h"
/* set statusbar */
void
setstatus(const char *str)
{
/* set WM_NAME via X11 */
XStoreName(dpy, DefaultRootWindow(dpy), str);
XSync(dpy, False);
}
/* smprintf function */
char *
smprintf(const char *fmt, ...)
{
va_list fmtargs;
char *ret = NULL;
va_start(fmtargs, fmt);
if (vasprintf(&ret, fmt, fmtargs) < 0)
return NULL;
va_end(fmtargs);
return ret;
}
/* battery percentage */
char *
get_battery(const char *battery)
{
int now, full, perc;
char batterynowfile[64] = "";
char batteryfullfile[64] = "";
FILE *fp;
/* generate battery nowfile path */
strcat(batterynowfile, batterypath);
strcat(batterynowfile, battery);
strcat(batterynowfile, "/");
strcat(batterynowfile, batterynow);
/* generate battery fullfile path */
strcat(batteryfullfile, batterypath);
strcat(batteryfullfile, battery);
strcat(batteryfullfile, "/");
strcat(batteryfullfile, batteryfull);
/* open battery now file */
if (!(fp = fopen(batterynowfile, "r"))) {
fprintf(stderr, "Error opening battery file.%s",batterynowfile);
return smprintf("n/a");
}
/* read value */
fscanf(fp, "%i", &now);
/* close battery now file */
fclose(fp);
/* open battery full file */
if (!(fp = fopen(batteryfullfile, "r"))) {
fprintf(stderr, "Error opening battery file.");
return smprintf("n/a");
}
/* read value */
fscanf(fp, "%i", &full);
/* close battery full file */
fclose(fp);
/* calculate percent */
perc = now / (full / 100);
/* return perc as string */
return smprintf("%d%%", perc);
}
/* cpu temperature */
char *
get_cpu_temperature(const char *file)
{
int temperature;
FILE *fp;
/* open temperature file */
if (!(fp = fopen(file, "r"))) {
fprintf(stderr, "Could not open temperature file.\n");
return smprintf("n/a");
}
/* extract temperature */
fscanf(fp, "%d", &temperature);
/* close temperature file */
fclose(fp);
/* return temperature in degrees */
return smprintf("%d°C", temperature / 1000);
}
/* cpu percentage */
char *
get_cpu_usage(const char *null)
{
int perc;
long double a[4], b[4];
FILE *fp;
/* open stat file */
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.");
return smprintf("n/a");
}
/* read values */
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
/* close stat file */
fclose(fp);
/* wait a second (for avg values) */
sleep(1);
/* open stat file */
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.");
return smprintf("n/a");
}
/* read values */
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
/* close stat file */
fclose(fp);
/* calculate avg in this second */
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 perc as string */
return smprintf("%d%%", perc);
}
/* date and time */
char *
get_datetime(const char *timeformat)
{
time_t tm;
size_t bufsize = 64;
char *buf = malloc(bufsize);
/* get time in format */
time(&tm);
setlocale(LC_TIME, "");
if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
setlocale(LC_TIME, "C");
fprintf(stderr, "Strftime failed.\n");
return smprintf("n/a");
}
setlocale(LC_TIME, "C");
/* return time */
char *ret = smprintf("%s", buf);
free(buf);
return ret;
}
/* disk usage percentage */
char *
get_diskusage(const char *mountpoint)
{
int perc = 0;
struct statvfs fs;
/* try to open mountpoint */
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf("n/a");
}
/* calculate percent */
perc = 100 * (1.0f - ((float)fs.f_bavail / (float)fs.f_blocks));
/* return perc */
return smprintf("%d%%", perc);
}
/* ram percentage */
char *
get_ram_usage(const char *null)
{
int perc;
long total, free, buffers, cached;
FILE *fp;
/* open meminfo file */
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.");
return smprintf("n/a");
}
/* read the values */
fscanf(fp, "MemTotal: %ld kB\n", &total);
fscanf(fp, "MemFree: %ld kB\n", &free);
fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
fscanf(fp, "Cached: %ld kB\n", &cached);
/* close meminfo file */
fclose(fp);
/* calculate percentage */
perc = 100 * ((total - free) - (buffers + cached)) / total;
/* return perc as string */
return smprintf("%d%%", perc);
}
/* alsa volume percentage */
char *
get_volume(const char *soundcard)
{
int mute = 0;
long vol = 0, max = 0, min = 0;
/* get volume from alsa */
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);
/* return the string (mute) */
if (!mute)
return smprintf("mute");
else
return smprintf("%d%%", (vol * 100) / max);
}
/* wifi percentage */
char *
get_wifi_signal(const char *wificard)
{
int bufsize = 255;
int strength;
char buf[bufsize];
char *datastart;
char path[64];
char status[5];
char needle[sizeof wificard + 1];
FILE *fp;
/* generate the path name */
memset(path, 0, sizeof path);
strcat(path, "/sys/class/net/");
strcat(path, wificard);
strcat(path, "/operstate");
/* open wifi file */
if(!(fp = fopen(path, "r"))) {
fprintf(stderr, "Error opening wifi operstate file.");
return smprintf("n/a");
}
/* read the status */
fgets(status, 5, fp);
/* close wifi file */
fclose(fp);
/* check if interface down */
if(strcmp(status, "up\n") != 0){
return smprintf("n/a");
}
/* open wifi file */
if (!(fp = fopen("/proc/net/wireless", "r"))) {
fprintf(stderr, "Error opening wireless file.");
return smprintf("n/a");
}
/* extract the signal strength */
strcpy(needle, wificard);
strcat(needle, ":");
fgets(buf, bufsize, fp);
fgets(buf, bufsize, fp);
fgets(buf, bufsize, fp);
if ((datastart = strstr(buf, needle)) != NULL) {
datastart = strstr(buf, ":");
sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &strength);
}
/* close wifi file */
fclose(fp);
/* return strength in percent */
return smprintf("%d%%", strength);
}
/* main function */
int
main()
{
char status_string[1024];
struct arg argument;
/* try to open display */
if (!(dpy = XOpenDisplay(0x0))) {
fprintf(stderr, "Cannot open display!\n");
exit(1);
}
/* return status every interval */
for (;;) {
/* clear the string */
memset(status_string, 0, sizeof(status_string));
/* generate status_string */
for (size_t i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
argument = args[i];
char *res = argument.func(argument.args);
char *element = smprintf(argument.format, res);
strcat(status_string, element);
free(res);
free(element);
}
/* return the statusbar */
setstatus(status_string);
/* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
sleep(update_interval -1);
}
/* close display */
XCloseDisplay(dpy);
/* exit successfully */
return 0;
}