Code files

Chapter03/fetching-meta-data/manipulating-meta-data/make-file-efficiently.js

@@ -0,0 +1,26 @@
+'use strict'
+
+const fs = require('fs')
+const {execSync} = require('child_process')
+
+const file = process.argv[2]
+if (!file) { 
+  console.error('specify a file')
+  process.exit(1)
+}
+try {
+  fs.accessSync(file)
+  console.error('file already exists')
+  process.exit(1)
+} catch (e) {
+  makeIt()
+}
+
+function makeIt() {
+  const nobody = Number(execSync('id -u nobody').toString().trim())
+  const fd = fs.openSync(file, 'w')
+  fs.fchmodSync(fd, 0)
+  fs.fchownSync(fd, nobody, nobody)
+  console.log(file + ' created')
+}
+

Chapter03/fetching-meta-data/manipulating-meta-data/make-file.js

@@ -0,0 +1,25 @@
+'use strict'
+
+const fs = require('fs')
+const {execSync} = require('child_process')
+
+const file = process.argv[2]
+if (!file) { 
+  console.error('specify a file')
+  process.exit(1)
+}
+try {
+  fs.accessSync(file)
+  console.error('file already exists')
+  process.exit(1)
+} catch (e) {
+  makeIt()
+}
+
+function makeIt() {
+  const nobody = Number(execSync('id -u nobody').toString().trim())
+  fs.writeFileSync(file, '')
+  fs.chownSync(file, nobody, nobody)
+  fs.chmodSync(file, 0)
+  console.log(file + ' created')
+}