/* global libraries */
#include <alsa/asoundlib.h>
+#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <X11/Xlib.h>
/* local libraries */
#include "config.h"
+/* check file macro */
+#define CHECK_FILE(X,Y) do { \
+ if (stat(X,&Y) < 0) return -1; \
+ if (!S_ISREG(Y.st_mode)) return -1; \
+} while (0);
+
/* functions */
+int config_check();
void setstatus(char *str);
+char *smprintf(char *fmt, ...);
char *get_battery();
char *get_cpu_temperature();
char *get_cpu_usage();
char *get_datetime();
char *get_ram_usage();
-char *smprintf(char *fmt, ...);
char *get_volume();
char *get_wifi_signal();
/* global variables */
static Display *dpy;
+/* check configured paths */
+int
+config_check()
+{
+ struct stat fs;
+ CHECK_FILE(batterynowfile, fs);
+ CHECK_FILE(batteryfullfile, fs);
+ CHECK_FILE(tempfile, fs);
+ return 0;
+}
+
/* set statusbar (WM_NAME) */
void
setstatus(char *str)
XSync(dpy, False);
}
+/* smprintf function */
+char *
+smprintf(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()
{
- int battery_now, battery_full, battery_perc;
+ int now, full, perc;
FILE *fp;
/* open battery now file */
if (!(fp = fopen(batterynowfile, "r"))) {
fprintf(stderr, "Error opening battery file.");
- exit(1);
+ return smprintf("n/a");
}
/* read value */
- fscanf(fp, "%i", &battery_now);
+ 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.");
- exit(1);
+ return smprintf("n/a");
}
/* read value */
- fscanf(fp, "%i", &battery_full);
+ fscanf(fp, "%i", &full);
/* close battery full file */
fclose(fp);
/* calculate percent */
- battery_perc = battery_now / (battery_full / 100);
+ perc = now / (full / 100);
- /* return batt_perc as string */
- return smprintf("%d%%", battery_perc);
+ /* return perc as string */
+ return smprintf("%d%%", perc);
}
/* cpu temperature */
/* open temperature file */
if (!(fp = fopen(tempfile, "r"))) {
fprintf(stderr, "Could not open temperature file.\n");
- exit(1);
+ return smprintf("n/a");
}
/* extract temperature */
char *
get_cpu_usage()
{
- int cpu_perc;
+ 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.");
- exit(1);
+ return smprintf("n/a");
}
/* read values */
/* open stat file */
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.");
- exit(1);
+ return smprintf("n/a");
}
/* read values */
fclose(fp);
/* calculate avg in this 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]));
+ 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 cpu_perc as string */
- return smprintf("%d%%", cpu_perc);
+ /* return perc as string */
+ return smprintf("%d%%", perc);
}
/* date and time */
get_datetime()
{
time_t tm;
- size_t bufsize = 19;
+ size_t bufsize = 64;
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 smprintf("n/a");
}
/* return time */
- return buf;
+ return smprintf("%s", buf);
}
/* ram percentage */
char *
get_ram_usage()
{
- int ram_perc;
- long total, free, available;
+ int perc;
+ long total, free, buffers, cached;
FILE *fp;
/* open meminfo file */
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.");
- exit(1);
+ 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\n", &available);
+ 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 */
- ram_perc = 100 * (total - available) / total;
+ perc = 100 * ((total - free) - (buffers + cached)) / total;
- /* return ram_perc as string */
- return smprintf("%d%%",ram_perc);
-}
-
-/* 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;
+ /* return perc as string */
+ return smprintf("%d%%", perc);
}
/* alsa volume percentage */
FILE *fp;
/* generate the path name */
-
memset(path, 0, sizeof path);
strcat(path, path_start);
strcat(path, wificard);
/* open wifi file */
if(!(fp = fopen(path, "r"))) {
fprintf(stderr, "Error opening wifi operstate file.");
- exit(1);
+ return smprintf("n/a");
}
/* read the status */
/* check if interface down */
if(strcmp(status, "up\n") != 0){
- return "n/a";
+ return smprintf("n/a");
}
/* open wifi file */
if (!(fp = fopen("/proc/net/wireless", "r"))) {
fprintf(stderr, "Error opening wireless file.");
- exit(1);
+ return smprintf("n/a");
}
/* extract the signal strength */
main()
{
char status[1024];
- char *wifi_signal = NULL;
char *battery = NULL;
- char *cpu_usage = NULL;
char *cpu_temperature = NULL;
+ char *cpu_usage = NULL;
+ char *datetime = NULL;
char *ram_usage = NULL;
char *volume = NULL;
- char *datetime = NULL;
+ char *wifi_signal = NULL;
+
+ /* check config for sanity */
+ if (config_check() < 0) {
+ fprintf(stderr, "Config error, please check paths and recompile\n");
+ exit(1);
+ }
/* open display */
if (!(dpy = XOpenDisplay(0x0))) {
/* return status every second */
for (;;) {
/* assign the values */
- wifi_signal = get_wifi_signal();
battery = get_battery();
- cpu_usage = get_cpu_usage();
cpu_temperature = get_cpu_temperature();
+ cpu_usage = get_cpu_usage();
+ datetime = get_datetime();
ram_usage = get_ram_usage();
volume = get_volume();
- datetime = get_datetime();
+ wifi_signal = get_wifi_signal();
/* return the status */
sprintf(status, FORMATSTRING, ARGUMENTS);
setstatus(status);
/* free the values */
- free(wifi_signal);
free(battery);
- free(cpu_usage);
free(cpu_temperature);
+ free(cpu_usage);
+ free(datetime);
free(ram_usage);
free(volume);
- free(datetime);
+ free(wifi_signal);
+
+ /* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
+ sleep(update_interval -1);
}
/* close display */