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https://github.com/balena-io/etcher.git
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e641265f4d
This version includes support for retrying up to ten times when EIO errors are encountered during reading. See: https://github.com/resin-io-modules/etcher-image-write/pull/70 Fixes: https://github.com/resin-io/etcher/issues/981 Change-Type: patch Changelog-Entry: Fix sporadic "EIO: i/o error, read" errors during validation. Signed-off-by: Juan Cruz Viotti <jviotti@openmailbox.org>
104 lines
3.2 KiB
JavaScript
104 lines
3.2 KiB
JavaScript
/*
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* Copyright 2016 resin.io
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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const imageWrite = require('etcher-image-write');
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const imageStream = require('etcher-image-stream');
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const Bluebird = require('bluebird');
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const fs = Bluebird.promisifyAll(require('fs'));
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const os = require('os');
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const unmount = require('./unmount');
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/**
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* @summary Write an image to a disk drive
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* @function
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* @public
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*
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* @description
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* See https://github.com/resin-io-modules/etcher-image-write for information
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* about the `state` object passed to `onProgress` callback.
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*
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* @param {String} imagePath - path to image
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* @param {Object} drive - drive
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* @param {Object} options - options
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* @param {Boolean} [options.unmountOnSuccess=false] - unmount on success
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* @param {Boolean} [options.validateWriteOnSuccess=false] - validate write on success
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* @param {Function} onProgress - on progress callback (state)
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*
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* @fulfil {Boolean} - whether the operation was successful
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* @returns {Promise}
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*
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* @example
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* writer.writeImage('path/to/image.img', {
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* device: '/dev/disk2'
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* }, {
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* unmountOnSuccess: true,
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* validateWriteOnSuccess: true
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* }, (state) => {
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* console.log(state.percentage);
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* }).then(() => {
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* console.log('Done!');
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* });
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*/
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exports.writeImage = (imagePath, drive, options, onProgress) => {
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return Bluebird.try(() => {
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// Unmounting a drive in Windows means we can't write to it anymore
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if (os.platform() === 'win32') {
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return;
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}
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return unmount.unmountDrive(drive);
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}).then(() => {
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return fs.openAsync(drive.raw, 'rs+');
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}).then((driveFileDescriptor) => {
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return imageStream.getFromFilePath(imagePath).then((image) => {
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return imageWrite.write({
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fd: driveFileDescriptor,
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device: drive.raw,
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size: drive.size
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}, image, {
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check: options.validateWriteOnSuccess,
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transform: image.transform,
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bmap: image.bmap,
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bytesToZeroOutFromTheBeginning: image.bytesToZeroOutFromTheBeginning
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});
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}).then((writer) => {
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return new Bluebird((resolve, reject) => {
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writer.on('progress', onProgress);
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writer.on('error', reject);
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writer.on('done', resolve);
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});
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}).tap(() => {
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// Make sure the device stream file descriptor is closed
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// before returning control the the caller. Not closing
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// the file descriptor (and waiting for it) results in
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// `EBUSY` errors when attempting to unmount the drive
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// right afterwards in some Windows 7 systems.
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return fs.closeAsync(driveFileDescriptor).then(() => {
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if (!options.unmountOnSuccess) {
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return;
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}
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return unmount.unmountDrive(drive);
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});
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});
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});
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};
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