3 files changed, 140 insertions, 0 deletions
diff --git a/src/modules/initsystem/initsystem.c b/src/modules/initsystem/initsystem.c
new file mode 100644
index 0000000..3c3f367
--- /dev/null
+++ b/src/modules/initsystem/initsystem.c
@@ -0,0 +1,120 @@
+#include "common/printing.h"
+#include "common/jsonconfig.h"
+#include "common/strutil.h"
+#include "detection/initsystem/initsystem.h"
+#include "modules/initsystem/initsystem.h"
+
+#define FF_INITSYSTEM_DISPLAY_NAME "Init System"
+
+bool ffPrintInitSystem(FFInitSystemOptions* options) {
+    bool success = false;
+    FFInitSystemResult result = {
+        .name = ffStrbufCreate(),
+        .exe = ffStrbufCreate(),
+        .version = ffStrbufCreate(),
+        .pid = 1,
+    };
+
+    const char* error = ffDetectInitSystem(&result);
+
+    if (error) {
+        ffPrintError(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "%s", error);
+        goto exit;
+    }
+
+    if (options->moduleArgs.outputFormat.length == 0) {
+        ffPrintLogoAndKey(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
+        ffStrbufWriteTo(&result.name, stdout);
+        if (result.version.length) {
+            printf(" %s\n", result.version.chars);
+        } else {
+            putchar('\n');
+        }
+    } else {
+        FF_PRINT_FORMAT_CHECKED(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, ((FFformatarg[]) {
+                                                                                                                FF_ARG(result.name, "name"),
+                                                                                                                FF_ARG(result.exe, "exe"),
+                                                                                                                FF_ARG(result.version, "version"),
+                                                                                                                FF_ARG(result.pid, "pid"),
+                                                                                                            }));
+    }
+    success = true;
+
+exit:
+    ffStrbufDestroy(&result.name);
+    ffStrbufDestroy(&result.exe);
+    ffStrbufDestroy(&result.version);
+
+    return success;
+}
+
+void ffParseInitSystemJsonObject(FFInitSystemOptions* 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_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Unknown JSON key %s", unsafe_yyjson_get_str(key));
+    }
+}
+
+void ffGenerateInitSystemJsonConfig(FFInitSystemOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
+    ffJsonConfigGenerateModuleArgsConfig(doc, module, &options->moduleArgs);
+}
+
+bool ffGenerateInitSystemJsonResult(FF_A_UNUSED FFInitSystemOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
+    bool success = false;
+    FFInitSystemResult result = {
+        .name = ffStrbufCreate(),
+        .exe = ffStrbufCreate(),
+        .version = ffStrbufCreate(),
+        .pid = 1,
+    };
+
+    const char* error = ffDetectInitSystem(&result);
+
+    if (error) {
+        yyjson_mut_obj_add_str(doc, module, "error", error);
+        goto exit;
+    }
+
+    yyjson_mut_val* obj = yyjson_mut_obj_add_obj(doc, module, "result");
+    yyjson_mut_obj_add_strbuf(doc, obj, "name", &result.name);
+    yyjson_mut_obj_add_strbuf(doc, obj, "exe", &result.exe);
+    yyjson_mut_obj_add_strbuf(doc, obj, "version", &result.version);
+    yyjson_mut_obj_add_uint(doc, obj, "pid", result.pid);
+    success = true;
+
+exit:
+    ffStrbufDestroy(&result.name);
+    ffStrbufDestroy(&result.exe);
+    ffStrbufDestroy(&result.version);
+    return success;
+}
+
+void ffInitInitSystemOptions(FFInitSystemOptions* options) {
+    ffOptionInitModuleArg(&options->moduleArgs, "󰿄");
+}
+
+void ffDestroyInitSystemOptions(FFInitSystemOptions* options) {
+    ffOptionDestroyModuleArg(&options->moduleArgs);
+}
+
+FFModuleBaseInfo ffInitSystemModuleInfo = {
+    .name = FF_INITSYSTEM_MODULE_NAME,
+    .description = "Print init system (pid 1) name and version",
+    .initOptions = (void*) ffInitInitSystemOptions,
+    .destroyOptions = (void*) ffDestroyInitSystemOptions,
+    .parseJsonObject = (void*) ffParseInitSystemJsonObject,
+    .printModule = (void*) ffPrintInitSystem,
+    .generateJsonResult = (void*) ffGenerateInitSystemJsonResult,
+    .generateJsonConfig = (void*) ffGenerateInitSystemJsonConfig,
+    .formatArgs = FF_FORMAT_ARG_LIST(((FFModuleFormatArg[]) {
+        { "Init system name", "name" },
+        { "Init system exe path", "exe" },
+        { "Init system version path", "version" },
+        { "Init system pid", "pid" },
+    }))
+};
diff --git a/src/modules/initsystem/initsystem.h b/src/modules/initsystem/initsystem.h
new file mode 100644
index 0000000..381b955
--- /dev/null
+++ b/src/modules/initsystem/initsystem.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include "option.h"
+
+#define FF_INITSYSTEM_MODULE_NAME "InitSystem"
+
+bool ffPrintInitSystem(FFInitSystemOptions* options);
+void ffInitInitSystemOptions(FFInitSystemOptions* options);
+void ffDestroyInitSystemOptions(FFInitSystemOptions* options);
+
+extern FFModuleBaseInfo ffInitSystemModuleInfo;
diff --git a/src/modules/initsystem/option.h b/src/modules/initsystem/option.h
new file mode 100644
index 0000000..f592849
--- /dev/null
+++ b/src/modules/initsystem/option.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "common/option.h"
+
+typedef struct FFInitSystemOptions {
+    FFModuleArgs moduleArgs;
+} FFInitSystemOptions;
+
+static_assert(sizeof(FFInitSystemOptions) <= FF_OPTION_MAX_SIZE, "FFInitSystemOptions size exceeds maximum allowed size");