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#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "status/cpuusage.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()
{
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;
// Error signaling color
fputs("^fg(yellow)", stdout);
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
fputs("^fg(#0077FF)", stdout);
} else {
// CPU busy
fputs("^fg(#FF00FF)", stdout);
}
//printf(" CPU: %.0f%% ", cpu_history[0] * 100);
}
free(stline);
}
if (getloadavg(loadavg, 3) > 0) {
printf(" %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));
}
//fputs(" CPU usage ", stdout);
}
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