diff --git a/snippets/pwdtest.js b/snippets/pwdtest.js new file mode 100644 index 0000000..7bf3933 --- /dev/null +++ b/snippets/pwdtest.js @@ -0,0 +1,70 @@ +/* +Copyright 2022 Intel Corporation +@author Bryan Roe + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + + +// +// This code sample/snippet illustrates how to hookup stdin, so that input can be read. +// In this particular case, we are using stdin to read a password +// + + +console.log('Starting Test...'); + +console.echo = false; // This disables local echo to the console when keys are pressed +console.canonical = false; // This takes the console out of canonical mode, which means stdin will process each key press individually, instead of by line. + + +// On first use of process.stdin, will cause the runtime to create a stream object, and hook it up so that it can be used to read from stdin, either by piping it, or by registering for events +process.stdin.chars = ''; // This is where we will store the result +process.stdin.on('data', function (c) +{ + switch(c[0]) + { + case 127: // Linux Backspace + case 8: // Windows Backspace + process.stdout.write('\r'); + for (i = 0; i < this.chars.length; ++i) + { + process.stdout.write(' '); // Whenever BS is pressed, we need to clear the entire line, so we can redraw the '*' characters + } + process.stdout.write('\r'); + if (this.chars.length > 0) { this.chars = this.chars.substring(0,this.chars.length-1); } // On BS press, we will remove the last character we saved + for (i = 0; i < this.chars.length; ++i) + { + process.stdout.write('*'); // Output a '*' to the console for each character that we have saved + } + break; + case 10: // Linux CR + case 13: // Windows CR + console.log('\nPWD=' + this.chars); // When CR is pressed, we are done, and will simply dump what we saved to show what we captured + process.exit(); + break; + default: + this.chars += c.toString(); + process.stdout.write('*'); // For each key press, we will output a '*' to the console + break; + } +}); + +process.on('exit', function () +{ + // On POSIX, it is very important that we reset the console back to its normal/default settings... Otherwise, + // if we exit the app while the console is still set with echo and canonical disabled, it will remain in that state + // making it difficult for the user to know whats going on when trying to interact with the console. + console.echo = true; + console.canonical = true; +}); \ No newline at end of file