Implement system env and app resolver

src/os/src/kernel/modules/app/app.kmod.ts

@@ -5,22 +5,41 @@ import { uiarrtostr } from "../../../lib/libts/uint_arr";
 import {
   kmod_filesystem_listDir,
   kmod_filesystem_readFile,
+  kmod_filesystem_stat,
 } from "../filesystem/filesystem.kmod";
 import { oskrnl_register } from "../../../oskrnl";
+import { getPathEnv } from "../../../lib/sys/env";
 
 export function kmod_app_init() {
   oskrnl_register();
 }
 
 export function kmod_app_run(path: string) {
+  const appPath = kmod_app_resolve(path);
+  if (!appPath) throw new Error("App not found");
+
   const meta = JSON.parse(
-    uiarrtostr(kmod_filesystem_readFile(Path.join(path, "meta.lam"))!)
+    uiarrtostr(kmod_filesystem_readFile(Path.join(appPath, "meta.lam"))!)
   );
 
   if (!meta) throw new Error("App metadata not found");
 
-  const entrypoint = Path.join(path, meta["app:entrypoint"]);
+  const entrypoint = Path.join(appPath, meta["app:entrypoint"]);
   const code = uiarrtostr(kmod_filesystem_readFile(entrypoint)!);
 
   iexec(code);
 }
+
+export function kmod_app_resolve(path: string): string | null {
+  if (kmod_filesystem_stat(path)) return path;
+
+  const pathEnv = getPathEnv();
+  if (!pathEnv) return null;
+
+  for (let i = 0; i < pathEnv.length; i++) {
+    const p = Path.join(pathEnv[i]!, path);
+    if (kmod_filesystem_stat(p)) return p;
+  }
+
+  return null;
+}

src/os/src/lib/sys/env.ts

@@ -0,0 +1,22 @@
+import { kmod_filesystem_readFile } from "../../kernel/modules/filesystem/filesystem.kmod";
+import { uiarrtostr } from "../libts/uint_arr";
+
+export function getEnv(key: string): string | null {
+  const data = uiarrtostr(kmod_filesystem_readFile("/disk/uenv")!);
+  const lines = data.split("\n");
+
+  for (let i = 0; i < lines.length; i++) {
+    const kv = lines[i]!.split("=");
+
+    if (kv[0] == key) return kv[1]!;
+  }
+
+  return null;
+}
+
+export function getPathEnv(): string[] | null {
+  const path = getEnv("PATH");
+  if (!path) return null;
+
+  return path.split(":");
+}

src/os/src/oskrnl/index.ts

@@ -4,7 +4,7 @@ import { oskrnl_input_onKeyPress } from "./input/input";
 
 export function oskrnl_register() {
   (globalThis as any).__oskrnl = {
-    app_args: "why",
+    app_args: null,
     console_log: oskrnl_console_log,
     console_update: oskrnl_console_update,
     input_onKeyPress: oskrnl_input_onKeyPress,

test-hdd/uenv

@@ -0,0 +1 @@
+PATH=/disk/apps