3 files changed, 101 insertions, 0 deletions
diff --git a/src/modules/kernel/kernel.c b/src/modules/kernel/kernel.c
new file mode 100644
index 0000000..c405cbf
--- /dev/null
+++ b/src/modules/kernel/kernel.c
@@ -0,0 +1,81 @@
+#include "common/printing.h"
+#include "common/jsonconfig.h"
+#include "common/size.h"
+#include "common/strutil.h"
+#include "modules/kernel/kernel.h"
+
+bool ffPrintKernel(FFKernelOptions* options) {
+    const FFPlatformSysinfo* info = &instance.state.platform.sysinfo;
+    if (options->moduleArgs.outputFormat.length == 0) {
+        ffPrintLogoAndKey(FF_KERNEL_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
+        printf("%s %s\n", info->name.chars, info->release.chars);
+    } else {
+        FF_STRBUF_AUTO_DESTROY str = ffStrbufCreate();
+        ffSizeAppendNum(info->pageSize, &str);
+        FF_PRINT_FORMAT_CHECKED(FF_KERNEL_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, ((FFformatarg[]) {
+                                                                                                           FF_ARG(info->name, "sysname"),
+                                                                                                           FF_ARG(info->release, "release"),
+                                                                                                           FF_ARG(info->version, "version"),
+                                                                                                           FF_ARG(info->architecture, "arch"),
+                                                                                                           FF_ARG(str, "page-size"),
+                                                                                                       }));
+    }
+
+    return true;
+}
+
+void ffParseKernelJsonObject(FFKernelOptions* options, yyjson_val* module) {
+    yyjson_val *key, *val;
+    size_t idx, max;
+    yyjson_obj_foreach (module, idx, max, key, val) {
+        if (ffJsonConfigParseModuleArgs(key, val, &options->moduleArgs)) {
+            continue;
+        }
+
+        ffPrintError(FF_KERNEL_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Unknown JSON key %s", unsafe_yyjson_get_str(key));
+    }
+}
+
+void ffGenerateKernelJsonConfig(FFKernelOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
+    ffJsonConfigGenerateModuleArgsConfig(doc, module, &options->moduleArgs);
+}
+
+bool ffGenerateKernelJsonResult(FF_A_UNUSED FFKernelOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
+    const FFPlatformSysinfo* info = &instance.state.platform.sysinfo;
+
+    yyjson_mut_val* obj = yyjson_mut_obj_add_obj(doc, module, "result");
+    yyjson_mut_obj_add_strbuf(doc, obj, "architecture", &info->architecture);
+    yyjson_mut_obj_add_strbuf(doc, obj, "name", &info->name);
+    yyjson_mut_obj_add_strbuf(doc, obj, "release", &info->release);
+    yyjson_mut_obj_add_strbuf(doc, obj, "version", &info->version);
+    yyjson_mut_obj_add_uint(doc, obj, "pageSize", info->pageSize);
+
+    return true;
+}
+
+void ffInitKernelOptions(FFKernelOptions* options) {
+    ffOptionInitModuleArg(&options->moduleArgs, "");
+}
+
+void ffDestroyKernelOptions(FFKernelOptions* options) {
+    ffOptionDestroyModuleArg(&options->moduleArgs);
+}
+
+FFModuleBaseInfo ffKernelModuleInfo = {
+    .name = FF_KERNEL_MODULE_NAME,
+    .description = "Print system kernel version",
+    .initOptions = (void*) ffInitKernelOptions,
+    .destroyOptions = (void*) ffDestroyKernelOptions,
+    .parseJsonObject = (void*) ffParseKernelJsonObject,
+    .printModule = (void*) ffPrintKernel,
+    .generateJsonResult = (void*) ffGenerateKernelJsonResult,
+    .generateJsonConfig = (void*) ffGenerateKernelJsonConfig,
+    .formatArgs = FF_FORMAT_ARG_LIST(((FFModuleFormatArg[]) {
+        { "Sysname", "sysname" },
+        { "Release", "release" },
+        { "Version", "version" },
+        { "Architecture", "arch" },
+        { "Display version", "display-version" },
+        { "Page size", "page-size" },
+    }))
+};
diff --git a/src/modules/kernel/kernel.h b/src/modules/kernel/kernel.h
new file mode 100644
index 0000000..010ec54
--- /dev/null
+++ b/src/modules/kernel/kernel.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include "option.h"
+
+#define FF_KERNEL_MODULE_NAME "Kernel"
+
+bool ffPrintKernel(FFKernelOptions* options);
+void ffInitKernelOptions(FFKernelOptions* options);
+void ffDestroyKernelOptions(FFKernelOptions* options);
+
+extern FFModuleBaseInfo ffKernelModuleInfo;
diff --git a/src/modules/kernel/option.h b/src/modules/kernel/option.h
new file mode 100644
index 0000000..a6520a9
--- /dev/null
+++ b/src/modules/kernel/option.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "common/option.h"
+
+typedef struct FFKernelOptions {
+    FFModuleArgs moduleArgs;
+} FFKernelOptions;
+
+static_assert(sizeof(FFKernelOptions) <= FF_OPTION_MAX_SIZE, "FFKernelOptions size exceeds maximum allowed size");