cpu: OS split

[slstatus.git] / components / Linux / cpu.c

diff --git a/components/Linux/cpu.c b/components/Linux/cpu.c
new file mode 100644 (file)
index 0000000..bfc204c
--- /dev/null
+++ b/components/Linux/cpu.c
@@ -0,0 +1,64 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../../util.h"
+
+const char *
+cpu_freq(void)
+{
+       int freq;
+
+       return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
+                      "%i", &freq) == 1) ?
+              bprintf("%d", (freq + 500) / 1000) : NULL;
+}
+
+const char *
+cpu_perc(void)
+{
+       int perc;
+       static long double a[7];
+       static int valid;
+       long double b[7];
+
+       memcpy(b, a, sizeof(b));
+       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 (!valid) {
+               valid = 1;
+               return NULL;
+       }
+
+       perc = 100 * ((b[0]+b[1]+b[2]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[5]+a[6])) /
+              ((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]));
+
+       return bprintf("%d", perc);
+}
+
+const char *
+cpu_iowait(void)
+{
+       int perc;
+       static int valid;
+       static long double a[7];
+       long double b[7];
+
+       memcpy(b, a, sizeof(b));
+       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 (!valid) {
+               valid = 1;
+               return NULL;
+       }
+
+       perc = 100 * ((b[4]) - (a[4])) /
+              ((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]));
+
+       return bprintf("%d", perc);
+}