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<title>Issue 2612: [filesys.ts] [PDTS] uintmax_t too small for large file sizes</title>
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<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#NAD_Future">NAD Future</a> status.</em></p>
<h3 id="2612"><a href="lwg-closed.html#2612">2612</a>. [filesys.ts] [PDTS] <code>uintmax_t</code> too small for large file sizes</h3>
<p><b>Section:</b> 6 [filesys.ts::fs.filesystem.synopsis], 15.14 [filesys.ts::fs.op.file_size] <b>Status:</b> <a href="lwg-active.html#NAD_Future">NAD Future</a>
 <b>Submitter:</b> CH-8 <b>Opened:</b> 2014-01-20 <b>Last modified:</b> 2016-08-10</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all other</b> <a href="lwg-index.html#filesys.ts::fs.filesystem.synopsis">issues</a> in [filesys.ts::fs.filesystem.synopsis].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#NAD Future">NAD Future</a> status.</p>
<p><b>Discussion:</b></p>
<p><b>Addresses: filesys.ts</b></p>
<p><code>uintmax_t</code> is specified to hold at least 64 bit. This is not enough for sizes
beyond 4 [sic] exabytes.</p>

<p>Specify whether an implementation must provide a <code>uintmax_t</code> that can hold the maximum
possible space and file size values.</p>

  <p>
    <i>[2014-02-06: Jeffery Yasskin points out 64-bits unsigned actually has a maximum value of "16 exabytes, not 4"]</i>
  </p>

  <p>
    <i>[2014-02-07: Beman Dawes suggests: This should be NAD. Such ultra-large files are the province
    of enterprise-wide filesystems such as requested by IBM and others for a follow-on SG3 TS. That would be
    the best vehicle to address this concern IMO.]</i>
  </p>

  <p><i>[
    2014-02-11 Issaquah: NAD Future.
  ]</i></p>




<p id="res-2612"><b>Proposed resolution:</b></p>





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