Kmod (NetBSD): add support

src/util/kmod.c

@@ -31,6 +31,50 @@ bool ffKmodLoaded(const char* modName)
 {
     return modfind(modName) >= 0;
 }
+#elif __NetBSD__
+#include "util/stringUtils.h"
+
+#include <sys/module.h>
+#include <sys/param.h>
+
+typedef struct FFNbsdModList
+{
+    int len;
+    modstat_t mods[];
+} FFNbsdModList;
+
+bool ffKmodLoaded(const char* modName)
+{
+    static FFNbsdModList* list = NULL;
+
+    if (list == NULL)
+    {
+        struct iovec iov = {};
+
+        // 初始尝试分配的内存大小
+        for (size_t len = 8192;; len = iov.iov_len)
+        {
+            iov.iov_len = len;
+            iov.iov_base = realloc(iov.iov_base, len);
+            if (modctl(MODCTL_STAT, &iov) < 0)
+            {
+                free(iov.iov_base);
+                return true; // ignore errors
+            }
+
+            if (len >= iov.iov_len) break;
+        }
+        list = (FFNbsdModList*) iov.iov_base;
+    }
+
+    for (int i = 0; i < list->len; i++)
+    {
+        if (ffStrEquals(list->mods[i].ms_name, modName))
+            return true;
+    }
+
+    return false;
+}
 #elif __APPLE__
 #include "util/apple/cf_helpers.h"
 #include <IOKit/kext/KextManager.h>