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slstatus/components/cpu.c
NRK 0c2b3e5b5c do not rely on obsolete feature
function prototype with unspecified argument is obsolete since c99.

additionally some of these function which don't take any argument were
being called with a `const char *` arg, which is UB.

fix both these issues by declararing ALL the components to accept a
`const char *`, and name the arg "unused" if it's meant to be ignored.
2022-10-26 23:32:43 +02:00

166 lines
3.4 KiB
C

/* See LICENSE file for copyright and license details. */
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "../util.h"
#include "../slstatus.h"
#if defined(__linux__)
const char *
cpu_freq(const char *unused)
{
uintmax_t freq;
/* in kHz */
if (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/"
"scaling_cur_freq", "%ju", &freq) != 1) {
return NULL;
}
return fmt_human(freq * 1000, 1000);
}
const char *
cpu_perc(const char *unused)
{
static long double a[7];
long double b[7], sum;
memcpy(b, a, sizeof(b));
/* cpu user nice system idle iowait irq softirq */
if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
&a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6])
!= 7) {
return NULL;
}
if (b[0] == 0) {
return NULL;
}
sum = (b[0] + b[1] + b[2] + b[3] + b[4] + b[5] + b[6]) -
(a[0] + a[1] + a[2] + a[3] + a[4] + a[5] + a[6]);
if (sum == 0) {
return NULL;
}
return bprintf("%d", (int)(100 *
((b[0] + b[1] + b[2] + b[5] + b[6]) -
(a[0] + a[1] + a[2] + a[5] + a[6])) / sum));
}
#elif defined(__OpenBSD__)
#include <sys/param.h>
#include <sys/sched.h>
#include <sys/sysctl.h>
const char *
cpu_freq(const char *unused)
{
int freq, mib[2];
size_t size;
mib[0] = CTL_HW;
mib[1] = HW_CPUSPEED;
size = sizeof(freq);
/* in MHz */
if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) {
warn("sysctl 'HW_CPUSPEED':");
return NULL;
}
return fmt_human(freq * 1E6, 1000);
}
const char *
cpu_perc(const char *unused)
{
int mib[2];
static uintmax_t a[CPUSTATES];
uintmax_t b[CPUSTATES], sum;
size_t size;
mib[0] = CTL_KERN;
mib[1] = KERN_CPTIME;
size = sizeof(a);
memcpy(b, a, sizeof(b));
if (sysctl(mib, 2, &a, &size, NULL, 0) < 0) {
warn("sysctl 'KERN_CPTIME':");
return NULL;
}
if (b[0] == 0) {
return NULL;
}
sum = (a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]);
if (sum == 0) {
return NULL;
}
return bprintf("%d", 100 *
((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
a[CP_INTR]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
b[CP_INTR])) / sum);
}
#elif defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/sysctl.h>
#include <devstat.h>
const char *
cpu_freq(const char *unused)
{
int freq;
size_t size;
size = sizeof(freq);
/* in MHz */
if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) == -1
|| !size) {
warn("sysctlbyname 'hw.clockrate':");
return NULL;
}
return fmt_human(freq * 1E6, 1000);
}
const char *
cpu_perc(const char *unused)
{
size_t size;
static long a[CPUSTATES];
long b[CPUSTATES], sum;
size = sizeof(a);
memcpy(b, a, sizeof(b));
if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) == -1
|| !size) {
warn("sysctlbyname 'kern.cp_time':");
return NULL;
}
if (b[0] == 0) {
return NULL;
}
sum = (a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]);
if (sum == 0) {
return NULL;
}
return bprintf("%d", 100 *
((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
a[CP_INTR]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
b[CP_INTR])) / sum);
}
#endif