nodejs: file io

rootfs_overlay/lkmc/nodejs/command_line_arguments.js

@@ -1,5 +1,7 @@
 #!/usr/bin/env node
 
+// https://cirosantilli.com/linux-kernel-module-cheat#node-js
+
 for (const arg of process.argv) {
   console.log(arg);
 }

rootfs_overlay/lkmc/nodejs/file_write_read.js

@@ -0,0 +1,20 @@
+#!/usr/bin/env node
+
+// https://cirosantilli.com/linux-kernel-module-cheat#node-js
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+const file_path = path.basename(__filename) + '.tmp';
+const data = 'asdf\nqwer\n';
+const encoding = 'utf8';
+
+// Write to file.
+//
+// Error handling through exceptions:
+// https://stackoverflow.com/questions/15543235/checking-if-writefilesync-successfully-wrote-the-file
+fs.writeFileSync(file_path, data, encoding);
+
+// Read from file.
+assert.strictEqual(fs.readFileSync(file_path, encoding), data);