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How to use the openSync function from graceful-fs

Find comprehensive JavaScript graceful-fs.openSync code examples handpicked from public code repositorys.

graceful-fs.openSync is a synchronous version of the fs.open method, which opens a file and returns its file descriptor.

fsutil.js

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var F_WRLCK = 1;
var SEEK_SET = 0;


exports.createPidFile = createPidFile;
function createPidFile(path) {
  var fd = fs.openSync(path, 'a+', 0600);
  if (!posix.acquireRecordLock(fd, F_WRLCK, SEEK_SET, 0, 0)) {
    return false;
  }

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fs.js

GitHub: canarddu38/DUCKSPLOIT

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exports.mkdirs = mkdirs;
exports.mkdirsSync = mkdirsSync;


// open
exports.open = Promise.promisify(fs.open);
exports.openSync = fs.openSync;


// symlink
exports.symlink = Promise.promisify(fs.symlink);
exports.symlinkSync = fs.symlinkSync;

+ 7 other calls in file

How does graceful-fs.openSync work?

graceful-fs.openSync is a synchronous method in the graceful-fs library that opens a file in the specified mode and returns a file descriptor, which is a unique identifier for the file opened by the operating system. This method is similar to the built-in fs.openSync() method but provides additional error handling and retries in case of certain errors.

utimes.js

GitHub: lesly-mlab/mlab-app-v2

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  tmpfile = path.join(os.tmpdir(), tmpfile)


  // 550 millis past UNIX epoch
  const d = new Date(1435410243862)
  fs.writeFileSync(tmpfile, 'https://github.com/jprichardson/node-fs-extra/pull/141')
  const fd = fs.openSync(tmpfile, 'r+')
  fs.futimesSync(fd, d, d)
  fs.closeSync(fd)
  return fs.statSync(tmpfile).mtime > 1435410243000
}

index.js

GitHub: Benihana52/Stock-Market-Board-Game-Calc

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const BUF_LENGTH = 64 * 1024
const _buff = buffer(BUF_LENGTH)

const flags = overwrite ? 'w' : 'wx'

const fdr = fs.openSync(src, 'r')
const stat = fs.fstatSync(fdr)
const fdw = fs.openSync(dest, flags, stat.mode)
let pos = 0

Ai Example

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const fs = require("graceful-fs");

try {
  const fd = fs.openSync("example.txt", "r");
  console.log("File opened successfully.");
  fs.closeSync(fd);
} catch (err) {
  console.error("Error occurred while opening file:", err);
}

In this example, fs.openSync is used to open the file example.txt in read mode ('r') synchronously. If the file opening is successful, a success message is logged to the console, and the file descriptor returned by fs.openSync is used to close the file synchronously using fs.closeSync. If an error occurs during the file opening process, an error message is logged to the console.

configure.js

GitHub: codigo-com/node-gyp

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 */
function findAccessibleSync (logprefix, dir, candidates) {
  for (var next = 0; next < candidates.length; next++) {
    var candidate = path.resolve(dir, candidates[next])
    try {
      var fd = fs.openSync(candidate, 'r')
    } catch (e) {
      // this candidate was not found or not readable, do nothing
      log.silly(logprefix, 'Could not open %s: %s', candidate, e.message)
      continue

copy-file-sync.js

GitHub: Junbadatcoding/simplewebsite2

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  }
}

var fdr = fs.openSync(srcFile, 'r')
var stat = fs.fstatSync(fdr)
var fdw = fs.openSync(destFile, 'w', stat.mode)
var bytesRead = 1
var pos = 0

while (bytesRead > 0) {

+ 3 other calls in file

copy-file-sync.js

GitHub: pooja4141/qedassignment

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  } else return
}

const fdr = fs.openSync(srcFile, 'r')
const stat = fs.fstatSync(fdr)
const fdw = fs.openSync(destFile, 'w', stat.mode)
let bytesRead = 1
let pos = 0

while (bytesRead > 0) {

+ 3 other calls in file

manager.js

GitHub: scar17off/ywop-server

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function file_size(fd) {
	return fs.fstatSync(fd).size;
}


function file_open(path) {
	return fs.openSync(path, "r+");
}


function file_read(fd, offset, len) {
	var res = Buffer.alloc(len);

utimes.js

GitHub: NJUyd2001/2023_NJUspringE-

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    })
  })
}


function utimesMillisSync (path, atime, mtime) {
  const fd = fs.openSync(path, 'r+')
  fs.futimesSync(fd, atime, mtime)
  return fs.closeSync(fd)
}

+ 5 other calls in file

copy-sync.js

GitHub: NJUyd2001/2023_NJUspringE-

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function copyFileFallback (srcStat, src, dest, opts) {
  const BUF_LENGTH = 64 * 1024
  const _buff = require('../util/buffer')(BUF_LENGTH)


  const fdr = fs.openSync(src, 'r')
  const fdw = fs.openSync(dest, 'w', srcStat.mode)
  let pos = 0


  while (pos < srcStat.size) {
    const bytesRead = fs.readSync(fdr, _buff, 0, BUF_LENGTH, pos)

+ 5 other calls in file

index.js

GitHub: ds-sampaio/ClicouChegou-BackEnd

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var fd
var cleanup = cleanupOnExit(tmpfile)
var removeOnExitHandler = onExit(cleanup)

try {
  fd = fs.openSync(tmpfile, 'w', options.mode)
  if (Buffer.isBuffer(data)) {
    fs.writeSync(fd, data, 0, data.length, 0)
  } else if (data != null) {
    fs.writeSync(fd, String(data), 0, String(options.encoding || 'utf8'))

+ 3 other calls in file

index.js

GitHub: robertokoba7/alx-backend-javascript

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  }
}

var cleanup = cleanupOnExit(tmpfile)
var removeOnExitHandler = onExit(cleanup)
var fd = fs.openSync(tmpfile, 'w', options.mode)
if (Buffer.isBuffer(data)) {
  fs.writeSync(fd, data, 0, data.length, 0)
} else if (data != null) {
  fs.writeSync(fd, String(data), 0, String(options.encoding || 'utf8'))

+ 3 other calls in file

fs.js

GitHub: Sathish9686/Gadgets-Page

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	throw new CpFileError(`chown \`${path}\` failed: ${error.message}`, error);
});


exports.openSync = (path, flags, mode) => {
	try {
		return fs.openSync(path, flags, mode);
	} catch (error) {
		if (flags.includes('w')) {
			throw new CpFileError(`Cannot write to \`${path}\`: ${error.message}`, error);
		}

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