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<H1><A NAME="SECTION0081800000000000000000">
6.18 <tt class="module">errno</tt> --
         Standard errno system symbols</A>
</H1>

<P>


<P>
This module makes available standard <code>errno</code> system symbols.
The value of each symbol is the corresponding integer value.
The names and descriptions are borrowed from <span class="file">linux/include/errno.h</span>,
which should be pretty all-inclusive.

<P>
<dl><dt><b><a name='l2h-1348'><tt>errorcode</tt></a></b>
<dd>
  Dictionary providing a mapping from the errno value to the string
  name in the underlying system.  For instance,
  <code>errno.errorcode[errno.EPERM]</code> maps to <code>'EPERM'</code>.
</dl>

<P>
To translate a numeric error code to an error message, use
<tt class="function">os.strerror()</tt>.

<P>
Of the following list, symbols that are not used on the current
platform are not defined by the module.  The specific list of defined
symbols is available as <code>errno.errorcode.keys()</code>.  Symbols
available can include:

<P>
<dl><dt><b><a name='l2h-1349'><tt>EPERM</tt></a></b>
<dd> Operation not permitted </dl>
<dl><dt><b><a name='l2h-1350'><tt>ENOENT</tt></a></b>
<dd> No such file or directory </dl>
<dl><dt><b><a name='l2h-1351'><tt>ESRCH</tt></a></b>
<dd> No such process </dl>
<dl><dt><b><a name='l2h-1352'><tt>EINTR</tt></a></b>
<dd> Interrupted system call </dl>
<dl><dt><b><a name='l2h-1353'><tt>EIO</tt></a></b>
<dd> I/O error </dl>
<dl><dt><b><a name='l2h-1354'><tt>ENXIO</tt></a></b>
<dd> No such device or address </dl>
<dl><dt><b><a name='l2h-1355'><tt>E2BIG</tt></a></b>
<dd> Arg list too long </dl>
<dl><dt><b><a name='l2h-1356'><tt>ENOEXEC</tt></a></b>
<dd> Exec format error </dl>
<dl><dt><b><a name='l2h-1357'><tt>EBADF</tt></a></b>
<dd> Bad file number </dl>
<dl><dt><b><a name='l2h-1358'><tt>ECHILD</tt></a></b>
<dd> No child processes </dl>
<dl><dt><b><a name='l2h-1359'><tt>EAGAIN</tt></a></b>
<dd> Try again </dl>
<dl><dt><b><a name='l2h-1360'><tt>ENOMEM</tt></a></b>
<dd> Out of memory </dl>
<dl><dt><b><a name='l2h-1361'><tt>EACCES</tt></a></b>
<dd> Permission denied </dl>
<dl><dt><b><a name='l2h-1362'><tt>EFAULT</tt></a></b>
<dd> Bad address </dl>
<dl><dt><b><a name='l2h-1363'><tt>ENOTBLK</tt></a></b>
<dd> Block device required </dl>
<dl><dt><b><a name='l2h-1364'><tt>EBUSY</tt></a></b>
<dd> Device or resource busy </dl>
<dl><dt><b><a name='l2h-1365'><tt>EEXIST</tt></a></b>
<dd> File exists </dl>
<dl><dt><b><a name='l2h-1366'><tt>EXDEV</tt></a></b>
<dd> Cross-device link </dl>
<dl><dt><b><a name='l2h-1367'><tt>ENODEV</tt></a></b>
<dd> No such device </dl>
<dl><dt><b><a name='l2h-1368'><tt>ENOTDIR</tt></a></b>
<dd> Not a directory </dl>
<dl><dt><b><a name='l2h-1369'><tt>EISDIR</tt></a></b>
<dd> Is a directory </dl>
<dl><dt><b><a name='l2h-1370'><tt>EINVAL</tt></a></b>
<dd> Invalid argument </dl>
<dl><dt><b><a name='l2h-1371'><tt>ENFILE</tt></a></b>
<dd> File table overflow </dl>
<dl><dt><b><a name='l2h-1372'><tt>EMFILE</tt></a></b>
<dd> Too many open files </dl>
<dl><dt><b><a name='l2h-1373'><tt>ENOTTY</tt></a></b>
<dd> Not a typewriter </dl>
<dl><dt><b><a name='l2h-1374'><tt>ETXTBSY</tt></a></b>
<dd> Text file busy </dl>
<dl><dt><b><a name='l2h-1375'><tt>EFBIG</tt></a></b>
<dd> File too large </dl>
<dl><dt><b><a name='l2h-1376'><tt>ENOSPC</tt></a></b>
<dd> No space left on device </dl>
<dl><dt><b><a name='l2h-1377'><tt>ESPIPE</tt></a></b>
<dd> Illegal seek </dl>
<dl><dt><b><a name='l2h-1378'><tt>EROFS</tt></a></b>
<dd> Read-only file system </dl>
<dl><dt><b><a name='l2h-1379'><tt>EMLINK</tt></a></b>
<dd> Too many links </dl>
<dl><dt><b><a name='l2h-1380'><tt>EPIPE</tt></a></b>
<dd> Broken pipe </dl>
<dl><dt><b><a name='l2h-1381'><tt>EDOM</tt></a></b>
<dd> Math argument out of domain of func </dl>
<dl><dt><b><a name='l2h-1382'><tt>ERANGE</tt></a></b>
<dd> Math result not representable </dl>
<dl><dt><b><a name='l2h-1383'><tt>EDEADLK</tt></a></b>
<dd> Resource deadlock would occur </dl>
<dl><dt><b><a name='l2h-1384'><tt>ENAMETOOLONG</tt></a></b>
<dd> File name too long </dl>
<dl><dt><b><a name='l2h-1385'><tt>ENOLCK</tt></a></b>
<dd> No record locks available </dl>
<dl><dt><b><a name='l2h-1386'><tt>ENOSYS</tt></a></b>
<dd> Function not implemented </dl>
<dl><dt><b><a name='l2h-1387'><tt>ENOTEMPTY</tt></a></b>
<dd> Directory not empty </dl>
<dl><dt><b><a name='l2h-1388'><tt>ELOOP</tt></a></b>
<dd> Too many symbolic links encountered </dl>
<dl><dt><b><a name='l2h-1389'><tt>EWOULDBLOCK</tt></a></b>
<dd> Operation would block </dl>
<dl><dt><b><a name='l2h-1390'><tt>ENOMSG</tt></a></b>
<dd> No message of desired type </dl>
<dl><dt><b><a name='l2h-1391'><tt>EIDRM</tt></a></b>
<dd> Identifier removed </dl>
<dl><dt><b><a name='l2h-1392'><tt>ECHRNG</tt></a></b>
<dd> Channel number out of range </dl>
<dl><dt><b><a name='l2h-1393'><tt>EL2NSYNC</tt></a></b>
<dd> Level 2 not synchronized </dl>
<dl><dt><b><a name='l2h-1394'><tt>EL3HLT</tt></a></b>
<dd> Level 3 halted </dl>
<dl><dt><b><a name='l2h-1395'><tt>EL3RST</tt></a></b>
<dd> Level 3 reset </dl>
<dl><dt><b><a name='l2h-1396'><tt>ELNRNG</tt></a></b>
<dd> Link number out of range </dl>
<dl><dt><b><a name='l2h-1397'><tt>EUNATCH</tt></a></b>
<dd> Protocol driver not attached </dl>
<dl><dt><b><a name='l2h-1398'><tt>ENOCSI</tt></a></b>
<dd> No CSI structure available </dl>
<dl><dt><b><a name='l2h-1399'><tt>EL2HLT</tt></a></b>
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