/usr/lib/nodejs/vinyl-fs/lib/fileOperations.js is in node-vinyl-fs 2.4.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | 'use strict';
var fs = require('graceful-fs');
var assign = require('object-assign');
var isEqual = require('lodash.isequal');
var isValidDate = require('vali-date');
// TODO shared module
// TODO include sticky/setuid/setgid, i.e. 7777?
var MASK_MODE = parseInt('0777', 8);
var DEFAULT_FILE_MODE = parseInt('0666', 8);
var APPEND_MODE_REGEXP = /a/;
function closeFd(propagatedErr, fd, callback) {
if (typeof fd !== 'number') {
return callback(propagatedErr);
}
fs.close(fd, onClosed);
function onClosed(closeErr) {
if (propagatedErr || closeErr) {
return callback(propagatedErr || closeErr);
}
callback();
}
}
function getModeDiff(fsMode, vinylMode) {
var modeDiff = 0;
if (typeof vinylMode === 'number') {
modeDiff = (vinylMode ^ fsMode) & MASK_MODE;
}
return modeDiff;
}
function getTimesDiff(fsStat, vinylStat) {
if (!isValidDate(vinylStat.mtime)) {
return;
}
if (isEqual(vinylStat.mtime, fsStat.mtime) &&
isEqual(vinylStat.atime, fsStat.atime)) {
return;
}
var atime;
if (isValidDate(vinylStat.atime)) {
atime = vinylStat.atime;
} else {
atime = fsStat.atime;
}
if (!isValidDate(atime)) {
atime = undefined;
}
var timesDiff = {
mtime: vinylStat.mtime,
atime: atime,
};
return timesDiff;
}
function isOwner(fsStat) {
var hasGetuid = (typeof process.getuid === 'function');
var hasGeteuid = (typeof process.geteuid === 'function');
// If we don't have either, assume we don't have permissions.
// This should only happen on Windows.
// Windows basically noops fchmod and errors on futimes called on directories.
if (!hasGeteuid && !hasGetuid) {
return false;
}
var uid;
if (hasGeteuid) {
uid = process.geteuid();
} else {
uid = process.getuid();
}
if (fsStat.uid !== uid && uid !== 0) {
return false;
}
return true;
}
function updateMetadata(fd, file, callback) {
fs.fstat(fd, onStat);
function onStat(err, stat) {
if (err) {
return callback(err, fd);
}
// Check if mode needs to be updated
var modeDiff = getModeDiff(stat.mode, file.stat.mode);
// Check if atime/mtime need to be updated
var timesDiff = getTimesDiff(stat, file.stat);
// Set file.stat to the reflect current state on disk
assign(file.stat, stat);
// Nothing to do
if (!modeDiff && !timesDiff) {
return callback(null, fd);
}
// Check access, `futimes` and `fchmod` only work if we own the file,
// or if we are effectively root.
if (!isOwner(stat)) {
return callback(null, fd);
}
if (modeDiff) {
return mode();
}
times();
function mode() {
var mode = stat.mode ^ modeDiff;
fs.fchmod(fd, mode, onFchmod);
function onFchmod(fchmodErr) {
if (!fchmodErr) {
file.stat.mode = mode;
}
if (timesDiff) {
return times(fchmodErr);
}
callback(fchmodErr, fd);
}
}
function times(fchmodErr) {
fs.futimes(fd, timesDiff.atime, timesDiff.mtime, onFutimes);
function onFutimes(futimesErr) {
if (!futimesErr) {
file.stat.atime = timesDiff.atime;
file.stat.mtime = timesDiff.mtime;
}
callback(fchmodErr || futimesErr, fd);
}
}
}
}
/*
Custom writeFile implementation because we need access to the
file descriptor after the write is complete.
Most of the implementation taken from node core.
*/
function writeFile(path, data, options, callback) {
if (typeof options === 'function') {
callback = options;
options = {};
}
if (!Buffer.isBuffer(data)) {
callback(new TypeError('Data must be a Buffer'));
return;
}
if (!options) {
options = {};
}
// Default the same as node
var mode = options.mode || DEFAULT_FILE_MODE;
var flag = options.flag || 'w';
var position = APPEND_MODE_REGEXP.test(flag) ? null : 0;
fs.open(path, flag, mode, onOpen);
function onOpen(err, fd) {
if (err) {
return onComplete(err);
}
fs.write(fd, data, 0, data.length, position, onComplete);
function onComplete(err) {
callback(err, fd);
}
}
}
module.exports = {
closeFd: closeFd,
getModeDiff: getModeDiff,
getTimesDiff: getTimesDiff,
isOwner: isOwner,
updateMetadata: updateMetadata,
writeFile: writeFile,
};
|