README

Introduction

Mash provides a simple interface to interact with the file system and shell commands. It is currently similar to Node's fs Promises API but uses shell scripts. It spawns long running shell Child Processes and uses them for shell commands.

Ultimately this will become a complete JavaScript shell or ssh replacement. At the moment it is in early alpha and supports basic functionality.

[TOC]

Installation

npm install @TrevTheDev/Mash

Prerequisites

to copy and move files: rsync must be installed
only tested on Ubuntu and Arch Linux, should work on many flavors of Linux - but not yet tested
having gio installed is recommended

Objectives/Goals

To:

provide a clean and consistent interface for the posix file system ( similar to node fs / shell.js )
use shell commands
run all shell commands in long-running Child Processes vs. a new process for each command
provide progress information on copy and move

Lofty goals:

a fully functional cross platform html/JavaScript desktop replacement, possibly using Electron
a https interface that can replace ssh and be more functionally rich (auto complete, suggestions - similar to the chrome debugger scratch pad)
a clean and consistent posix systems administration and configuration interface
a sufficiently broad interface so that most admins will not have to resort to shell commands
simple and easily accessible recipes for commonly asked systems admin questions
a clean and consistent interface into common software and features.
the above for Windows, Mac OS, Android and iOS

We are far from achieving our lofty goals. If you are inspired, please contribute by:

help code and write some pull requests;
providing any useful feedback; and
logging and identifying issues.

Quick Overview

u() // current working directory object
u(['./path/to/dir', '/another/path']) // return an array of locations
u('./path/to/fileName.txt').path.name // returns 'fileName'

All the following are asynchronous and return a promise. They must be preceded by await excluded for brevity:

u('./path/to/dir').content // read directory content returns FsObjectArray
u('/path/to/dir').u('sub/dir') // returns FSObject '/path/to/dir/sub/dir'
u('./path/to/fileordir').parent // returns containing Directory
u('./path/to/fileordir').exists // confirms existence (returns boolean)

u('./path/to/dir').addDirectory('newDir') // creates a new dir object
u('./path/to/dir').addDirectory('newDir/nextDir') // creates two new dirs [array]
u('./path/to/dir').addDirectory(['a', 'b', 'c']) // creates three new dirs [array]

u('./path/to/dir').addFile('newFile.txt', 'content') // creates a new file with content.

u('./path/to/newSymlink').linkTo('/path/to/source') // creates symlink object
u('./path/to/symlink').linkTarget // returns symlink's Target FSObject
u('./path/to/symlink').linkEndTarget // symlink's ultimate target FSObject

u('./path/to/dirOrFile').touch() // touches object
u('./path/to/dir').rename('folderx') // renames to folderx
u('./path/to/source').copyTo('/path/to/dest') // copy to destination, with progress
u('./path/to/source').moveTo('/path/to/dest') // move to destination, with progress

u('./path/to/source').delete() // rm './path/to/source'
u('./path/to/source').trash() // moves to trash using gio
server.emptyTrash() // empties trash using gio

u('./path/to/source').stat() // stat, gio, lasattr and size of source

u('./path/to/source').type // returns posix fs type
u('./path/to/source').permissions // returns permissions e.g. 775
u('./path/to/source').permissions.symbol // returns permissions e.g. 'a+rwx'
u('./path/to/source').setPermissions('a+rwx') // chmod a+rwx
u('./path/to/source').user // returns user object
u('./path/to/source').setUser('bob') // sets user to bob
u('./path/to/source').group // returns group object
u('./path/to/source').setGroup('users') // sets group to 'users'

u('./path').cloneAttrs('./path/to/clone') // clones permissions, attributes,                                                           timestamps from fsObect to ./path
u('./path/to/dir').size // directory size object [size, file count etc.]

u('./path/to/file').read() // reads content of file
u('./path/to/file').write(content) // writes content to file
u('./path/to/file').append(content) // appends content to end of file

u('path/to/dir')
  .find.byName('myDoc')
  .byExt('txt')
  .biggerThan('100kB') // finds files

u('new/working/directory').cd() // set a new working directory

sh('some shell cmd;') // executes a shell command and returns result

server.users.currentUser // current user and group
server.pwd // gets current working directory

Example Code

import Server, {u, sh} from '@trevthedev/mash'

const server = new Server()

// think of u as being similar to a url bar except for the filesystem
const someDir = u('path/to/some/dir')

// if no path is supplied it defaults to the current working directory - pwd
const cwd = u()

console.log(`${cwd}`) // /path/to/current/working/directory

// creates a newFile in `some/dir` with content 'ABC'
const newFile = await u('some/dir').addFile('newFile.txt', 'ABC')

const statFile = await newFile.stat() // stat, gio, lsattr newFile
console.log(`${statFile.user}`) // someuser

const content = await newFile.read() // returns 'ABC'

const findIt = await u('some/dir')
  .find.byName('newFile')
  .byExt('txt')
  .smallerThan('100kB')
console.log(`${findIt[0]}`) // some/dir/newFile.txt

// copies NewFile
const copiedFile = await newFile.copyTo('/some/other/path')

// deletes newFile
await newFile.delete()

// moves copied file to trash
await u(`/some/other/path/${copiedFile.path.base}`).trash()

// JSON of directory's content
console.log(JSON.stringify(await u().content))

// run any shell command
const cmd = await sh('echo HELLO;')
console.log(cmd.output) // HELLO\n

await Server.instance.close() // shuts down all active shell processes

For more examples please see our test scripts

Specification

Exports:

Server <server>
u <function> see Server.u
sh <function> see Server.sh

Server

Instantiation:

const server = new Server(config)

Calling u or sh will create a new Server instance using default config, if an instance doesn't already exist.

config

config <object>

shell <object> default shell configuration
- shell config see configuration at https://github.com/TrevTheDev/shell-queue
log <boolean> creates a log file. Default: true
logger <object>
- console <object>
  - info <boolean> log info messages to console. Default: false
  - debug <boolean> log debug messages to console. Default: false
  - error <boolean> log error messages to console. Default: false
- file <object>
  - info <string> log info messages to provided path. Default: './logs/info.log'
  - debug <string> log debug messages to provided path. Default: './logs/debug.log'
  - error <string> log error messages to provided path. Default: './logs/error.log'

server.u(paths, shell)

paths <array of strings> | <array of paths> | <string> | <path> the path(s) to return
shell <shellHarness> optional shell for all child commands
returns <fsObject> | <fsObjArray>

server.sh(command, doneCBPayload, doneCallback, sendToEveryShell)

shortcut to server.shell.createCommand()

command <string> shell command to execute must terminate with a semi colon ;
doneCBPayload <anything> optional payload to pass to doneCallback
doneCallback <function> optional callback after command has executed, but before results returned. Whatever is returned from the doneCallback will be returned as the promise payload
sendToEveryShell <boolean> sends command to every shell queue. Default: false
returns <commandIFace promise> evaluates to results of shell command or doneCallback payload

server.users

returns: <users> see - Users

server.config

returns: <object> server config

server.emptyTrash()

empties the trash using gio trash
returns <boolean> true if no error occurred

server.close()

gracefully terminates any commands in the queue or shuts down any shell child processes

server.shell

returns <shellHarness> default shell - see shell-harness for further documentation

server.executionContext

returns <executionContext> default executionContext for commands

FsObject

const fsObject = u( paths, shell) | server.u( paths, shell)

paths <array of strings> | <paths> | <string> | <path> the path(s) to return
shell <shellHarness> optional default shell for all child commands
returns <fsObject>| <fsObjArray>

fsObject.stat(gio, lsattr, size)

gio <boolean> include gio results. Default is true
lsattr <boolean> include lsattr results. Default is true
size <boolean> include comprehensive size results for directories. Default is false

permissions <object>
- accessRights <string> octal string of permissions
- octal <sting> octal string of permissions
- symbol <string> sting of permissions
- boolArray <array> boolean array of permissions
- user <user>
- group <group>
accessRights <string> octal string of permissions
group <group>
user <user>
paths <pathContainer> see PathContainer
blocksAllocated <integer>
deviceNumber <integer>
type <FILE_TYPE_ENUMS>
- file
- directory
- symbolic link
- character device
- block device
- local socket
- named pipe
numberHardLinks <integer>
inode <integer>
majorDeviceType <integer>
minorDeviceType <integer>
timeOfBirth <date>
timeOfLastAccess <date>
timeOfLastModification <date>
timeOfLastStatusChange <date>
contentType <string>
fastContentType <string>
uri <string>
icon <string>
symbolicIcon <string>
etagValue <string>
fileId <string>
canRead <boolean>
canWrite <boolean>
canExecute <boolean>
canDelete <boolean>
canTrash <boolean>
canRename <boolean>
timeOfLastModificationMicroSec <integer>
timeOfLastAccessMicroSec <integer>
timeOfLastChangedMicroSec <integer>
mode <integer>
rdev <integer>
userReal <string>
lsattrArr <array>
size <size> | <directorySize>
- DirectorySize
  - size <size>
  - diskUsage <size>
  - directoryCount <integer>
  - fileCount <integer>
loadedGio <boolean> true if fsObject gio'ed
loadedStat <boolean> true if fsObject stat'ed
loadedLsattr <boolean> true if fsObject lsattr'ed
loadedContent <boolean> true if Directory content loaded
loadedSize <boolean> true if Directory size queried
lsattr booleans
- appendOnly
- compressed
- noDump
- extentFormat
- immutable
- dataJournaling
- secureDeletion
- noTailMerging
- unDeletable
- noAtimeUpdates
- synchronousDirectoryUpdates
- synchronousUpdates
- topOfDirectoryHierarchy
- hugeFile
- compressionError
- indexedDirectory
- compressionRawAccess
- compressedDirtyFile

fsObject.copyTo(destinationDirectory, copyType, confirmOverwriteCallBack)

Uses rsync to copy files and directories

destinationDirectory <fsObject> | <path> | <string> destination of directory of copy
copyType <CP_TYPE>:
- 'overwrite'
- 'overwriteOlder'
- 'askBeforeOverwrite'
- 'doNotOverwrite'
confirmOverwriteCallBack <function> callback that must return a <string> one of:
- 'yes' - overwrite individual file or directory
- 'no' - don't overwrite individual file or directory
- 'all' - overwrite all files or directories
- 'none' - don't overwrite any files or directories
- 'cancel' - cancel copyTo
returns <progressTracker→fsObject > promise that will ultimately evaluate to destination fsObject

ProgressTracker

Tracks copyTo or moveTo progress.

Events:
- progressUpdate
members
- targetBytes <size>
- bytesCompleted <size>
- bytesRemaining <size>
- progressFileCount <integer>
- targetFileCount <integer>
- progressFileCount <integer>
- targetDirectoryCount <integer>
- progressDirectoryCount <integer>
- percentageCompleted <percentage>
- deltaRateOfCompletion <rate>
- rateOfCompletion <rate>
- deltaETC <date-fns distance>
- ETC <date-fns distance>
- sourceFSObject <fsObject>
- destinationDirectory <fsObject>
- currentSourcePath <path>
- currentDestinationDirectoryPath <path>
- startedAt <date-fns formatted date>
- cancel() - cancels copy
Returns <promise→fsObject> promise that will ultimately evaluate to destination fsObject object

Example

const copyCmd = u('directoryOrFileToCopy').copyTo('copy/to/here')
copyCmd.on('progressUpdate', progressTracker => {
  console.log(`bytesCompleted: ${progressTracker.bytesCompleted}`)
  console.log(`bytesRemaining: ${progressTracker.bytesRemaining}`)
  console.log(`progressFileCount: ${progressTracker.progressFileCount}`)
  console.log(
    `progressDirectoryCount: ${progressTracker.progressDirectoryCount}`
  )
  console.log(`percentageCompleted: ${progressTracker.percentageCompleted}`)
  console.log(`rateOfCompletion: ${progressTracker.rateOfCompletion}`)
  console.log(`ETC: ${progressTracker.ETC}`)
    
  progressTracker.cancel() // cancels copyTo
})
await copyCmd

fsObject.moveTo(destinationDirectory, copyType, confirmOverwriteCallBack)

Uses rsync to move files and directories. Same as copyTo, except source files and directories are deleted after move.

fsObject.rename(newName)

Uses mv to rename files or directories

newName <path> | <string> new name
returns <promise→fsObject> renamed file or directory

fsObject.cloneAttrs(sourceFsObject)

sourceFsObject <fsObject> source file system object whose attributes should be copied
returns <fsObject> matches owner (chown), permissions (chmod), attributes (chattr) and timestamps (touch)

fsObject.addDirectory(nameArr, ignoreAnyExistingDirectories)

Uses mkdir to create new directories

nameArr <path> | <string> | <array of paths> | <array of string> new directory name(s)
ignoreAnyExistingDirectories <boolean> whether to overwrite existing directories or files - default is false
returns <promise→Directory|Array of Directories> newly created directories
- nameArr of ['A1','A2','A3] will result in a directories as follows: path+/A1/A2/A3
  - nameArr of ['A1'],['A2'],['A3'] will result in a directories of path+/A1, path+/A2, path+/A3
  - nameArr of [['A1','B1','B2'],['A2'],['A3'] will result in path+/A1/B1/B2, path+/A2, path+/A3

fsObject.addFile(name, content, overwrite)

Creates a new file

name <path> | <string> new file name
content <string> content to write to file
overwrite <boolean> whether to overwrite existing directories or files - default is false
returns <promise→file> newly created file

fsObject.find

See FindBuilder below

fsObject.linkTo(destination, overwrite)

Creates a symbolic link fsObject to destination using ln.

destination <path> | <string> destination to be symlinked to
overwrite <boolean> remove any existing file or directory. Default: false
returns <promise→symlink> newly created symlink

fsObject.linkTarget

returns <promise→fsObject> the target of a symlink

fsObject.linkEndTarget

returns <promise→fsObject>` the ultimate target of a symlink or chain of symlinks

fsObject.touch()

returns <promise→fsObject> touch's fsObject

fsObject.delete(recursive, limitToThisDirsFileSystem, onlyIfExists)

deletes fsObject from file system using rm

recursive <boolean> delete recursively if directory. Default: false
limitToThisDirsFileSystem <boolean> when removing a hierarchy recursively, skip any directory that is on a file system different from that of the corresponding destination argument . Default: false
onlyIfExists <boolean> only deletes the file system object if it already exists, else returns false. Default: false
returns <promise→boolean> true

fsObject.trash()

gio trash fsObject

returns <boolean> true if successful

fsObject.setPermissions(permissions, applyRecursively)

sets fsObject file system permissions using chmod

permissions <string> any permission string accepted by chmod
applyRecursively <boolean> if directory apply permissions recursively. Default: false
returns <promise→fsObject> changed file system permissions

fsObject.content

returns a <fsObjectArray> populated with a directories contents if it is already loaded, otherwise returns a promise that loads it first

returns <promise | fsObjectArray> directory's contents | <Promise> resolves to directory's contents

fsObject.dir(gio, lsattr, size, recursively)

returns a <fsObjectArray> populated with a directories contents if it is already loaded, otherwise returns a promise that loads it first

gio <boolean> gio each item in directory's contents. Default: true
lsattr <boolean> lsattr each item in directory's contents. Default: true
size <boolean> query each directory's size. Default: false
applyRecursively <boolean> recursively populate all child directories. Default: false
returns <promise→fsObjectArray> resolves to directory's contents

fsObject.setUser(user, group, applyRecursively)

changes user and/or group using chown

user <string> | <user> new user
group <string> | <group> new group
applyRecursively <boolean> if directory changes user or group recursively. Default: false
returns <promise→fsObject> changed file system permissions

fsObject.setGroup(group, applyRecursively)

changes group using chgrp

group <string> | <group> new group
applyRecursively <boolean> if directory changes group recursively. Default: false
returns <promise→fsObject> changed file system permissions

fsObject.read()

returns <promise→string> of file contents using cat

fsObject.readStream(options)

options <object> see here
returns <readStream> of file contents

fsObject.write(content, overwrite)

writes content to a file

content <string> string to write to file
overwrite <boolean> overwrite the file if it already exists. Default: false
returns <promise→fsObject> new or overwritten file

Requires both the user who launched mash, and the shell user to have access to os.tmpdir()

fsObject.writeStream(readStream, overwrite)

Writes readable Stream to a file

readableStream <readableStream> stream to write to file
overwrite <boolean> overwrite the file if it already exists. Default: false
returns <promise→fsObject> new or overwritten file

Uses Node's File System module to write the file.

fsObject.append(content, encoding, mode)

Append data to a file, creating the file if it does not exist. Note this is not yet using the shell, but rather node's fsPromises

content <string> string to write to file
encoding <string> content encoding. Default: utf8
mode <string> if not supplied, the default of 0o666 is used.
returns <promise→fsObject> appended file

fsObject.readChunk(startPosition, numberOfBytes, encoding)

Reads from startPosition for numberOfBytes and returns it as a <string>. Note this is not yet using the shell, but rather node's read

startPosition <integer> position in bytes to start reading from
numberOfBytes <integer> number of bytes to read
encoding <string> if not supplied, the default of utf8 is used
returns <string> contents of file

fsObject.writeChunk(chunk, startPosition, encoding)

Writes chunk from startPosition and returns <boolean> if successful. Note this is not yet using the shell, but rather node's write

chunk <string> content to write to file
startPosition <integer> position in bytes to start writing from
encoding <string> if not supplied, the default of utf8 is used
returns <boolean> true if successful

fsObject.exists

returns <boolean> true if path exists and is accessible on file system uses realpath

fsObject.parent

returns <fsObject> object that is the containing parent or undefined if already root

fsObject.u(path)

path <path> | <string> relative child path
returns <fsObject> if fsObject path is /home fsObject.u('user/path') will reference /home/user/path

fsObject.executionContext

returns <executionContext> executionContext used by fsObject

fsObject.sh(command, doneCBPayload, doneCallback, sendToEveryShell)

provides access to the fsObject's referenced shell instance.

command <string> shell command to execute must terminate with a semi colon ;
doneCBPayload <anything> optional payload to pass to doneCallback
doneCallback <function> optional callback after command has executed, but before results returned. Whatever is returned from the doneCallback will be returned as the promise payload
sendToEveryShell <anything> sends same command to every ShellQueue
returns <commandIFace> promise that evaluates to results of the shell command or return from doneCallback

fsObject.paths

returns <pathContainer> see PathContainer

fsObject.path

returns <path> see Path

fsObject.toString()

returns <string> path string

fsObject.toJSON()

returns <JSON> path string if not loaded, otherwise JSON of all properties

File

extents FsObject

excludes: linkTo, linkTarget, linkEndTarget, addDirectory, addFile, dir, cd, content, find

modifies:

delete(onlyIfExists = false)
setPermissions(permissions)
setUser(user, group)
setGroup(group)

Symlink

extents FsObject

BlockDevice & CharacterDevice & LocalSocket & NamedPipe

extents FsObject

excludes: linkTo, linkTarget, linkEndTarget, addDirectory, addFile, dir, cd, content, find

modifies:

delete(onlyIfExists = false)
setPermissions(permissions)
setUser(user, group)
setGroup(group)

FsObjectArray

fsObjectArray.directories

returns <array> all the directories in the array

fsObjectArray.files

returns <array> all the files in the array

PathContainer

requestedPath
- returns <path> path originally requested
canonisedPath
- returns <path> path returned via realpath
canonised
- returns <boolean> if path has been canonised via the shell
statPath
- returns <path> path returned after await fsObject.stat()
symlinkTargetPath
- returns <path> symlink target if symlink via readlink
path
- returns <path> statPath || canonisedPath || requestedPath
canoniseRequestPath()
- returns <promise→path> path canonise'ed by realpath
getSymlinkTargetPath()
- returns <promise→path> symlink target path
exists()
- returns <promise→boolean> path exists on disk

Path

root <path> root of path
isRoot <boolean> true if path is root
ext <string> the file's extension
name <path> the name excluding any ext
base <path> the name including any ext
pathString <string> the path as a string
isAbsolute <boolean> true if path is absolute, false if relative
parentPath <path> path of the containing parent
addSegment(segment)
- segment <string> | <path> segment to add to path
toArray <array> path as an array
toString <string> path as a string
toJSON <json> path as json

FindBuilder

Builds the options for the find command. It provides the following helper functions:

byName(name)
byRegEx(regex) note regex is prefixed with `.*/`
ignoreCase() makes byName and byRegEx case insensitive
byInode(inodeNumber)
byExt(ext) - appends .ext | *.ext to name
byType(type) - type is FILE_TYPE_ENUMS
isDirectory() - directories only
isFile() - files only
isSymlink() - simlinks only
biggerThan(size) size is integer of bytes | size object | string representing size
smallerThan(size) size is integer of bytes | size object | string representing size
isEmpty() - only empty files or directories
modifiedWithin(minutes) minutes isinteger
modifiedAtLeast(minutes) minutes isinteger
accessedWithin(minutes) minutes isinteger
accessedAtLeast(minutes) minutes isinteger
metaDataModifiedWithin(minutes) minutes isinteger
metaDataModifiedAtLeast(minutes) minutes isinteger
byGroup(group) group is string | group
byGID(gid) gid isinteger
hasNoGroup()
byUser(user) user is string | user
byUID(uid) uid isinteger
hasNoUser()
ignoreSubdirectories()
isExecutable() - by current user
isReadable() - by current user
isWritable() - by current user

Later options may overwrite options that proceed them.

Alternatively options can be set directly via findBuilder.options(options) options object includes:

maxDepthToSearch: Default: undefined,
name: Default: undefined,
regex: Default: undefined,
caseInsensitive: Default: false
inodeNumber: Default: undefined,
ext: Default: undefined,
type: Default: undefined,
biggerThan: Default: undefined,
smallerThan: Default: undefined,
onlyIfEmptyFileOrDir: Default: false,
contentLastModifiedMinutesAgo: Default: undefined,
lastAccessedMinutesAgo: Default: undefined,
metaDataLastModifiedMinutesAgo: Default: undefined,
group: Default: undefined,
gid: Default: undefined,
hasNoGroup: Default: false,
user: Default: undefined,
uid: Default: undefined,
hasNoUser: Default: false,
atLeastMatchPermissions: Default: undefined,
isExecutable: Default: false,
isReadable: Default: false,
isWritable: Default: false

FindBuilder is a promise that evaluates to an fsObjectArray of the results of the find command.

Example Code

import {u} from '@trevthedev/mash'
//the following find options make no sense but is shown for illustration purposes
const findResult = await u('some/path')
  .find.byName('someName')
  .byExt('.txt')
  .byRegEx('some.reg.ex')
  .ignoreCase()
  .byInode(123)
  .byType(FILE_TYPE_ENUMS.file)
  .isDirectory()
  .isFile()
  .isSymlink()
  .biggerThan('1B')
  .smallerThan('200kB')
  .isEmpty()
  .modifiedWithin(60)
  .modifiedAtLeast(60)
  .accessedWithin(60)
  .accessedAtLeast(60)
  .metaDataModifiedWithin(60)
  .metaDataModifiedAtLeast(60)
  .byGroup('users')
  .byGID(1001)
  .hasNoGroup()
  .byUser('user')
  .byUID(1001)
  .hasNoUser()
  .ignoreSubdirectories()
  .isExecutable()
  .isReadable()
  .isWritable()

// alternatively:
const findResult2 = await u('some/path').find.options({
  atLeastMatchPermissions: undefined,
  biggerThan: 1,
  caseInsensitive: true,
  contentLastModifiedMinutesAgo: '+60',
  ext: '.txt',
  gid: 1001,
  group: 'users',
  hasNoGroup: false,
  hasNoUser: true,
  inodeNumber: 123,
  isExecutable: true,
  isReadable: true,
  isWritable: true,
  lastAccessedMinutesAgo: '+60',
  maxDepthToSearch: 1,
  metaDataLastModifiedMinutesAgo: '+60',
  name: 'someName',
  onlyIfEmptyFileOrDir: true,
  regex: 'some.reg.ex',
  smallerThan: 200000,
  type: FILE_TYPE_ENUMS.symbolicLink,
  uid: 1001,
  user: 'user'
})

Users

accessed via server.users

getUser(uidOrName)
- uidOrName <string> optional uid or name to look up using id, if none is supplied the user logged into the shell is returned
- returns <promise→user> returns user of uid or name
currentUser <promise→user> returns the shells current user using id
currentGroup <promise→group> returns the shells current group
knownUsers <array> array of know users previously returned via id
knownGroups <array> array of know groups previously returned via id

User

name <string> user name
uid <integer> uid
groups <array> array of groups user belongs to
effectiveGroup <group> user's effective group
type <string> 'user'
users <users> reference to users which links to the server and required shell

Group

name <string> group name
gid <integer> gid
type <string> 'group'
users <users> reference to users which links to the server and required shell

Advanced Shell Interaction Examples

Interact with shell

const cmd = server.shell.interact('echo "what is your name?" ; read name;\n')
cmd.on('data', stdout => {
  if (stdout === 'what is your name?\n') {
    cmd.stdin.write('Bob\necho $name\n ')
    cmd.sendDoneMarker() // required to indicate that this interaction is completed
  } else console.log(stdout) // `Bob\n`
})
const res = await cmd
console.log(res.output) // `what is your name?\nBob\n`

Get a root or other user shell

import {ShellHarness} from '@trevthedev/mash'

const rootShell = new ShellHarness({
  user: 'root', // or other user
  rootPassword: 'whatEver'
})
const res = await rootShell.createCommand('whoami;')
console.log(res.output) // 'root\n'

//or

const rootServer = new Server({
  shell: {
    user: 'root', // or other user
    rootPassword: 'whatEver'
  }
})
// now all commands will use rootServer - note only one server can run at a time
const whoami = sh('whoami;')
await rootServer.close()

Root is gained using sudo -S su and assumes sudo requires a password. As a hack, sending of password is delayed by config.shell.sudoWait default is 50. If root is not be acquired increase this.

Intercept and replace output

The output from a command can be intercepted in two ways and different result substituted if required.

import Server, {sh} from '@trevthedev/mash'
const cb = (cmd, cbData) => {
  console.log(cbData) // 'HIT'
  return true
}
console.log(await sh('printf HELLO ;', 'HIT', cb)) // true
await Server.instance.close() // clean up

const callBackServer = new Server({
  shell: {
    doneCallback: cb
  }
})
// now all commands will use doneCallback - note only one server can run at a time
console.log(await sh('printf HELLO ;', 'HIT')) // true
await Server.instance.close()

Receive data via IPC

const cmd = server.shell.interact(
  'printf "{\\"ipc\\": \\"true\\"}\\n" 1>&$NODE_CHANNEL_FD ; printf HELLO ; \n'
)
cmd.on('message', data => {
  console.log(data) // { ipc: "true" }
  cmd.sendDoneMarker() // required to finalise cmd
})
const res = await cmd
console.log(res.output) // `HELLO`

Send data via IPC

const cmd = server.shell.interact('echo ; \n')
cmd.on('data', stdout => {
  if (stdout === '\n') {
    cmd.sendMessage('HELLOBOB')
    cmd.stdin.write('read -r line <&3 ; printf $line ; \n')
    cmd.sendDoneMarker() // required to finalise cmd
  }
})
const res = await cmd
console.log(res.output) // \n"HELLOBOB"`

Node formats messages sent via IPC

Usage no npm install needed!

README

Introduction

Contents

Installation

Prerequisites

Objectives/Goals

Quick Overview

Example Code

Specification

Server

config

server.u(paths, shell)

server.sh(command, doneCBPayload, doneCallback, sendToEveryShell)

server.users

server.config

server.emptyTrash()

server.close()

server.shell

server.executionContext

FsObject

fsObject.stat(gio, lsattr, size)

fsObject.copyTo(destinationDirectory, copyType, confirmOverwriteCallBack)

ProgressTracker

fsObject.moveTo(destinationDirectory, copyType, confirmOverwriteCallBack)

fsObject.rename(newName)

fsObject.cloneAttrs(sourceFsObject)

fsObject.addDirectory(nameArr, ignoreAnyExistingDirectories)

fsObject.addFile(name, content, overwrite)

fsObject.find

fsObject.linkTo(destination, overwrite)

fsObject.linkTarget

fsObject.linkEndTarget

fsObject.touch()

fsObject.delete(recursive, limitToThisDirsFileSystem, onlyIfExists)

fsObject.trash()

fsObject.setPermissions(permissions, applyRecursively)

fsObject.content

fsObject.dir(gio, lsattr, size, recursively)

fsObject.setUser(user, group, applyRecursively)

fsObject.setGroup(group, applyRecursively)

fsObject.read()

fsObject.readStream(options)

fsObject.write(content, overwrite)

fsObject.writeStream(readStream, overwrite)

fsObject.append(content, encoding, mode)

fsObject.readChunk(startPosition, numberOfBytes, encoding)

fsObject.writeChunk(chunk, startPosition, encoding)

fsObject.exists

fsObject.parent

fsObject.u(path)

fsObject.executionContext

fsObject.sh(command, doneCBPayload, doneCallback, sendToEveryShell)

fsObject.paths

fsObject.path

fsObject.toString()

fsObject.toJSON()

Directory

Directory.toJSON(pathOnly, expandContent)

File

Symlink

BlockDevice & CharacterDevice & LocalSocket & NamedPipe

FsObjectArray

fsObjectArray.directories

fsObjectArray.files

PathContainer

Path

FindBuilder

Example Code

Users

User

Group

Advanced Shell Interaction Examples

Interact with shell

Get a root or other user shell

Intercept and replace output

Receive data via IPC

Send data via IPC