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#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "common.h"
#include "config.h"
#ifndef NUM_CPUS
#define NUM_CPUS 1
#endif
#ifndef CPU_HISTORY_SIZE
#define CPU_HISTORY_SIZE 1
#endif
#if CPU_HISTORY_SIZE < 1
#define CPU_HISTORY_SIZE 1
#endif
unsigned long last_cpu_used = 0;
unsigned long last_cpu_total = 0;
float cpu_history[CPU_HISTORY_SIZE]; // don't care about init values
void status_cpuusage(GlobalData *g)
{
StatusItem s;
char text[32] = { 0 };
double loadavg[3] = { -13.37, -13.37, -13.37 } ;
char *stline = NULL;
size_t stlen;
FILE *stfile;
unsigned long cpu_user;
unsigned long cpu_nice;
unsigned long cpu_sys;
unsigned long cpu_used;
unsigned long cpu_idle;
unsigned long cpu_total;
int i;
statusitem_init(&s);
s.text = text;
// Error signaling color
s.color = "#FFFF00"; // yellow
stfile = fopen("/proc/stat", "r");
if (stfile != NULL) {
for(i = CPU_HISTORY_SIZE - 1; i > 0; i--) {
cpu_history[i] = cpu_history[i - 1];
}
stlen = getline(&stline, &stlen, stfile);
fclose(stfile);
if ( 4 == sscanf(stline, "%*s %ld %ld %ld %ld",
&cpu_user, &cpu_nice, &cpu_sys, &cpu_idle) ) {
cpu_used = cpu_user + cpu_nice + cpu_sys;
cpu_total = cpu_used + cpu_idle;
// Now do the percentage
cpu_history[0] = (float)(cpu_used - last_cpu_used) /
(float)(cpu_total - last_cpu_total);
last_cpu_used = cpu_used;
last_cpu_total = cpu_total;
if (cpu_history[0] < 0.4) {
// CPU idling OK
s.color = "#0077FF";
} else {
// CPU busy
s.color = "#FF00FF";
}
}
free(stline);
}
if (getloadavg(loadavg, 3) > 0) {
snprintf(text, sizeof(text),
"%s%.0f,%.0f,%.0f,%.0f",
cpu_history[0] < 0.1000 ? " " : "",
cpu_history[0] * 100,
loadavg[0] * (100 / 1),
loadavg[1] * (100 / 1), // (100 / NUM_CPUS)
loadavg[2] * (100 / 1));
}
line_append_item(g, &s);
}
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