Initial commit: get everything rolling

usbkey-lifecycle.js

@@ -0,0 +1,61 @@
+// handles mounting/unmounting the USB drive
+import { execSync } from 'node:child_process';
+import { mkdirSync, rmdirSync, readFileSync, realpathSync, existsSync } from 'node:fs';
+
+export function isMounted(mountPath) {
+  try {
+    return readFileSync('/proc/mounts', 'utf8').includes(` ${mountPath} `);
+  } catch {
+    return false;
+  }
+}
+
+export function mountDrive(devNode, mountPath) {
+  if (isMounted(mountPath)) {
+    console.log(`[MOUNT] ${mountPath} is already mounted.`);
+    return true;
+  }
+  
+  try {
+    // ensure the directory exists first
+    mkdirSync(mountPath, { recursive: true });
+    
+    // mount with open permissions so copyparty/rsync don't hit EACCES
+    execSync(`mount -o umask=000,uid=1000,gid=1000 ${devNode} ${mountPath}`);
+    console.log(`[MOUNT] success: ${devNode} -> ${mountPath}`);
+    return true;
+  } catch (err) {
+    console.error(`[MOUNT] failed:`, err.message);
+    return false;
+  }
+}
+
+export function unmountDrive(mountPath) {
+  if (!isMounted(mountPath)) {
+    // cleanup orphaned directory just in case
+    try { rmdirSync(mountPath); } catch {}
+    return;
+  }
+
+  try {
+    console.log(`[UNMOUNT] flushing buffers and unmounting ${mountPath}...`);
+    execSync('sync'); // force kernel to write any pending data to the usb
+    execSync(`umount -l ${mountPath}`); // lazy unmount in case a process is stuck reading
+    rmdirSync(mountPath);
+    console.log(`[UNMOUNT] cleanly unmounted and removed directory.`);
+  } catch (err) {
+    console.error(`[UNMOUNT] failed:`, err.message);
+  }
+}
+
+export function driveExists(targetuid) {
+    const linuidpath = '/dev/disk/by-uid/${targetuid}'
+    if (!existsSync(linuidpath)) {
+        return null;
+    }
+    try {
+        return realpathSync(linuidpath)
+    } catch {
+        return null;
+    }
+}