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[Contribs] Add README, license text, and invert error code dictionaries.
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contrib/errcode/README
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32
contrib/errcode/README
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Error Code Lookup for gPXE
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==========================
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This program looks up gPXE error codes so you can locate the line of source
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code which produced the error.
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Setup
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-----
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You must run:
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./build_errcodedb.py >errcodedb.py
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This extracts error code definitions from the gPXE source code and produces a
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"database" which is used by the main program.
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Once you have done this errcode.py and errcodedb.py are the only files you
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need. They are now independent of the gPXE source code and can be moved
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anywhere.
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[OPTIONAL]
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A PHP script is provided as a web interface. First edit errcode.php to point
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$ERRCODE_PATH to the errcode.py script. Then move errcode.php to a location
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visible from your web server.
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Usage
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-----
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Looking up error codes on the command-line:
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./errcode.py 0x12345678
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Further information
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-------------------
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See http://etherboot.org/.
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Released under the GPL and written by Stefan Hajnoczi <stefanha@gmail.com>.
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#!/usr/bin/env python
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# Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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import sys
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import re
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@ -15,6 +30,15 @@ def err(msg):
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sys.stderr.write('%s: %s\n' % (sys.argv[0], msg))
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sys.exit(1)
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def to_pxenv_status(errno):
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return errno & 0xff
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def to_errfile(errno):
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return (errno >> 13) & 0x7ff
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def to_posix_errno(errno):
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return (errno >> 24) & 0x7f
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def load_header_file(filename, regexp):
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defines = {}
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for line in open(filename, 'r'):
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@ -42,7 +66,7 @@ def evaluate(defines, expr):
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err('invalid expression')
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return eval(pyexpr)
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def build(filenames, regexp):
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def build(filenames, regexp, selector):
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unevaluated = {}
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for filename in filenames:
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unevaluated.update(load_header_file(filename, regexp))
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@ -59,8 +83,12 @@ def build(filenames, regexp):
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changed = True
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if unevaluated:
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err('unable to evaluate all #defines')
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return evaluated
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print 'pxenv_status =', repr(build(pxenv_status_files, PXENV_STATUS_RE))
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print 'errfile =', repr(build(errfile_files, ERRFILE_RE))
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print 'posix_errno =', repr(build(posix_errno_files, POSIX_ERRNO_RE))
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lookup = {}
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for key, val in evaluated.iteritems():
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lookup[selector(val)] = key
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return lookup
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print 'pxenv_status =', repr(build(pxenv_status_files, PXENV_STATUS_RE, to_pxenv_status))
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print 'errfile =', repr(build(errfile_files, ERRFILE_RE, to_errfile))
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print 'posix_errno =', repr(build(posix_errno_files, POSIX_ERRNO_RE, to_posix_errno))
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@ -1,4 +1,22 @@
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<?
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/*
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* Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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// The path to the errcode.py script.
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$ERRCODE_PATH = './errcode.py';
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?>
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#!/usr/bin/env python
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# Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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import sys
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try:
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@ -19,11 +34,11 @@ def to_errfile(errno):
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def to_posix_errno(errno):
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return (errno >> 24) & 0x7f
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def lookup_errno_component(defines, selector, component):
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for key, val in defines.iteritems():
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if selector(val) == component:
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return key
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return '0x%x' % component
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def lookup_errno_component(defines, component):
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if component in defines:
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return defines[component]
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else:
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return '0x%x' % component
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class Errno(object):
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def __init__(self, errno):
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@ -37,10 +52,10 @@ class Errno(object):
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def prettystr(self):
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return 'pxenv_status=%s uniq=%d errfile=%s posix_errno=%s' % (
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lookup_errno_component(errcodedb.pxenv_status, to_pxenv_status, self.pxenv_status),
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lookup_errno_component(errcodedb.pxenv_status, self.pxenv_status),
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self.uniq,
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lookup_errno_component(errcodedb.errfile, to_errfile, self.errfile),
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lookup_errno_component(errcodedb.posix_errno, to_posix_errno, self.posix_errno)
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lookup_errno_component(errcodedb.errfile, self.errfile),
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lookup_errno_component(errcodedb.posix_errno, self.posix_errno)
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)
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def __str__(self):
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