SunOS: support CPUUsage detection

CMakeLists.txt

@@ -750,7 +750,7 @@ elseif(SunOS)
         src/detection/chassis/chassis_windows.c
         src/detection/cpu/cpu_sunos.c
         src/detection/cpucache/cpucache_nosupport.c
-        src/detection/cpuusage/cpuusage_nosupport.c
+        src/detection/cpuusage/cpuusage_sunos.c
         src/detection/cursor/cursor_linux.c
         src/detection/bluetooth/bluetooth_nosupport.c
         src/detection/disk/disk_sunos.c

src/detection/cpuusage/cpuusage_sunos.c

@@ -0,0 +1,38 @@
+#include "fastfetch.h"
+#include "detection/cpuusage/cpuusage.h"
+
+#include <kstat.h>
+#include <sys/sysinfo.h>
+
+static inline void kstatFreeWrap(kstat_ctl_t** pkc)
+{
+    assert(pkc);
+    if (*pkc)
+        kstat_close(*pkc);
+}
+
+const char* ffGetCpuUsageInfo(FFlist* cpuTimes)
+{
+    __attribute__((__cleanup__(kstatFreeWrap))) kstat_ctl_t* kc = kstat_open();
+    if (!kc)
+        return "kstat_open() failed";
+
+    for (int i = 0;; ++i)
+    {
+        kstat_t* ks = kstat_lookup(kc, "cpu_stat", i, NULL);
+
+        cpu_stat_t cs;
+        if (!ks || kstat_read(kc, ks, &cs) < 0)
+            break;
+
+        uint64_t inUse = cs.cpu_sysinfo.cpu[CPU_USER] + cs.cpu_sysinfo.cpu[CPU_KERNEL];
+        uint64_t total = inUse + cs.cpu_sysinfo.cpu[CPU_IDLE] + cs.cpu_sysinfo.cpu[CPU_WAIT];
+
+        FFCpuUsageInfo* info = (FFCpuUsageInfo*) ffListAdd(cpuTimes);
+        *info = (FFCpuUsageInfo) {
+            .inUseAll = inUse,
+            .totalAll = total,
+        };
+    }
+    return NULL;
+}