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/* fireload_cpu .. accessory to wmfire - Zinx Verituse */
/* e-mail @ zinx@linuxfreak.com */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <string.h>
#ifdef hpux
# include <sys/pstat.h>
# define USER_ST 0
# define NICE_ST 1
# define SYS_ST 2
# define IDLE_ST 3
#endif
#ifdef __SOLARIS__
# include <kstat.h>
# include <sys/sysinfo.h>
typedef struct cpu_struct {
kstat_t *cs_kstat;
cpu_stat_t cs_new;
cpu_stat_t cs_old;
} cpu_struct;
# define DELTA(i, x) (cpuinfo[i].cs_new.x - cpuinfo[i].cs_old.x)
#endif
#ifdef __NetBSD__
/********************************
* NetBSD code by Hubert Feyrer *
********************************/
int getload(int cpunum, int shownice) {
double load;
getloadavg(&load, 1);
return (int)(load * 100);
}
#elif defined(__SOLARIS__) /*ifdef __NetBSD__ */
/*****************************
* Solaris code by John Hitt *
*****************************/
static kstat_ctl_t *kc;
kstat_t *ksp;
cpu_struct *cpuinfo;
int ncpus;
int getload(int cpunum, int shownice) {
int load,i,ticks,hz,j;
double percent, etime;
cpu_sysinfo_t cpustuff;
load=0;
load=0;
hz = sysconf(_SC_CLK_TCK);
for (i=0; i < ncpus; i++) {
cpuinfo[i].cs_old = cpuinfo[i].cs_new;
if (kstat_read(kc, cpuinfo[i].cs_kstat, (void *)&cpuinfo[i].cs_new) == -1)
printf("kstat_read(): error getting cpuinfo\n");
ticks = 0;
for (j=0; j < CPU_STATES; j++)
ticks += DELTA(i, cpu_sysinfo.cpu[j]);
etime = (double)ticks / hz;
if (etime == 0.0) etime = 1.0;
percent = 100.0 / etime / hz;
#ifdef DEBUG
printf("----------------------------------\n");
printf("ticks: %d\n", ticks);
printf("percent: %.2f\n", percent);
printf("cpu %d: %d\n", i, (int)(DELTA(i, cpu_sysinfo.cpu[CPU_USER]) * percent) + (int)(DELTA(i, cpu_sysinfo.cpu[CPU_KERNEL]) * percent));
printf("----------------------------------\n");
#endif
load += (int)(DELTA(i, cpu_sysinfo.cpu[CPU_USER]) * percent) + (int)(DELTA(i, cpu_sysinfo.cpu[CPU_KERNEL]) * percent);
}
return (int)load/ncpus;
}
#else
int getload(int cpunum, int shownice) {
static int lastloadstuff = 0, lastidle = 0, lastnice = 0;
int loadline = 0, loadstuff = 0, nice = 0, idle = 0;
#ifdef hpux
/*****************************************
* HP-UX code (mostly) by Lyonel VINCENT *
*****************************************/
struct pst_dynamic pst_d;
int i;
pstat_getdynamic(&pst_d, sizeof(pst_d), (size_t)1, 0);
if (cpunum < 0 || cpunum >= psd_proc_cnt) {
for (i = 0; i < PST_MAX_CPUSTATES; i++) {
switch(i) {
case NICE_ST:
nice = pst_d.psd_cpu_time[i];
break;
case IDLE_ST:
idle = pst_d.psd_cpu_time[i];
break;
default: /* USER, SYS, BLOCK, SWAIT, INTR, SSYS ... */
load += pst_d.psd_cpu_time[i];
break;
}
}
} else /* cpunum >= 0 && cpunum < psd_proc_cnt */ {
for (i = 0; i < PST_MAX_CPUSTATES; i++) {
switch(i) {
case NICE_ST:
nice = pst_d.psd_mp_cpu_time[cpunum][i];
break;
case IDLE_ST:
idle = pst_d.psd_mp_cpu_time[cpunum][i];
break;
default: /* USER, SYS, BLOCK, SWAIT, INTR, SSYS ... */
load += pst_d.psd_mp_cpu_time[cpunum][i];
break;
}
}
}
#else /* hope this is a Linux box :) */
FILE *stat = fopen("/proc/stat", "r");
char temp[128], *p;
if (!stat) return 100;
while (fgets(temp, 128, stat)) {
if (!strncmp(temp, "cpu", 3) && (temp[3] == ' ' && cpunum < 0) || (temp[3] != ' ' && atol(&temp[3]) == cpunum)) {
p = strtok(temp, " \t\n");
loadstuff = atol(p = strtok(NULL, " \t\n"));
nice = atol(p = strtok(NULL, " \t\n"));
loadstuff += atol(p = strtok(NULL, " \t\n"));
idle = atol(p = strtok(NULL, " \t\n"));
break;
}
}
fclose(stat);
#endif /*def hpux */
if (!lastloadstuff && !lastidle && !lastnice) {
lastloadstuff = loadstuff; lastidle = idle; lastnice = nice;
return 0;
}
if (shownice) {
loadline = (loadstuff-lastloadstuff)+(idle-lastidle);
} else {
loadline = (loadstuff-lastloadstuff)+(nice-lastnice)+(idle-lastidle);
}
if (loadline)
loadline = ((loadstuff-lastloadstuff)*100)/loadline;
else loadline = 100;
lastloadstuff = loadstuff; lastidle = idle; lastnice = nice;
return loadline;
}
#endif /*def __NetBSD__ */
void do_help(char *prgname) {
printf("%s [-c<cpunum>] [-n] [-h]\n", prgname);
}
int main(int argc, char *argv[]) {
int ch, cpunum = -1, shownice = 1;
while ((ch = getopt(argc, argv, "c:hn")) != EOF) {
switch (ch) {
case 'c':
cpunum = atoi(optarg);
break;
case 'n':
shownice = 0;
break;
default: /* h is handled here */
do_help(argv[0]);
exit(0);
}
}
printf("fireload\t0\t100\n"); fflush(stdout);
for (;;) {
ch = getload(cpunum, shownice);
printf("%d\t%d\n", ch, ch); fflush(stdout);
usleep(100000);
}
exit(0);
}
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