// Copyright 2017 Lovell Fuller and others.
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// SPDX-License-Identifier: Apache-2.0
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'use strict';
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const fs = require('fs');
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const LDD_PATH = '/usr/bin/ldd';
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const SELF_PATH = '/proc/self/exe';
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const MAX_LENGTH = 2048;
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/**
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* Read the content of a file synchronous
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*
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* @param {string} path
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* @returns {Buffer}
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*/
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const readFileSync = (path) => {
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const fd = fs.openSync(path, 'r');
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const buffer = Buffer.alloc(MAX_LENGTH);
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const bytesRead = fs.readSync(fd, buffer, 0, MAX_LENGTH, 0);
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fs.close(fd, () => {});
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return buffer.subarray(0, bytesRead);
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};
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/**
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* Read the content of a file
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*
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* @param {string} path
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* @returns {Promise<Buffer>}
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*/
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const readFile = (path) => new Promise((resolve, reject) => {
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fs.open(path, 'r', (err, fd) => {
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if (err) {
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reject(err);
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} else {
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const buffer = Buffer.alloc(MAX_LENGTH);
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fs.read(fd, buffer, 0, MAX_LENGTH, 0, (_, bytesRead) => {
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resolve(buffer.subarray(0, bytesRead));
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fs.close(fd, () => {});
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});
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}
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});
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});
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module.exports = {
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LDD_PATH,
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SELF_PATH,
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readFileSync,
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readFile
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};
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