forked from osmocom/wireshark
160 lines
3.7 KiB
Python
160 lines
3.7 KiB
Python
#!/usr/bin/env python
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#
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# Looks for registration routines in the taps,
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# and assembles C code to call all the routines.
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#
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# This is a Python version of the make-reg-dotc shell script.
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# Running the shell script on Win32 is very very slow because of
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# all the process-launching that goes on --- multiple greps and
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# seds for each input file. I wrote this python version so that
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# less processes would have to be started.
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#
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# $Id$
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import os
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import sys
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import re
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import pickle
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from stat import *
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#
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# The first argument is the directory in which the source files live.
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#
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srcdir = sys.argv[1]
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#
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# The second argument is "taps".
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#
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registertype = sys.argv[2]
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if registertype == "taps":
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tmp_filename = "wireshark-tap-register.c-tmp"
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final_filename = "wireshark-tap-register.c"
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cache_filename = "wireshark-tap-register-cache.pkl"
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else:
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print "Unknown output type '%s'" % registertype
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sys.exit(1)
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#
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# All subsequent arguments are the files to scan.
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#
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files = sys.argv[3:]
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# Create the proper list of filenames
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filenames = []
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for file in files:
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if os.path.isfile(file):
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filenames.append(file)
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else:
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filenames.append("%s/%s" % (srcdir, file))
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if len(filenames) < 1:
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print "No files found"
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sys.exit(1)
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# Look through all files, applying the regex to each line.
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# If the pattern matches, save the "symbol" section to the
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# appropriate array.
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regs = {
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'tap_reg': [],
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}
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# For those that don't know Python, r"" indicates a raw string,
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# devoid of Python escapes.
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tap_regex0 = r"^(?P<symbol>register_tap_listener_[_A-Za-z0-9]+)\s*\([^;]+$"
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tap_regex1 = r"void\s+(?P<symbol>register_tap_listener_[_A-Za-z0-9]+)\s*\([^;]+$"
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# This table drives the pattern-matching and symbol-harvesting
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patterns = [
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( 'tap_reg', re.compile(tap_regex0) ),
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( 'tap_reg', re.compile(tap_regex1) ),
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]
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# Open our registration symbol cache
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cache = None
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if cache_filename:
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try:
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cache_file = open(cache_filename, 'rb')
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cache = pickle.load(cache_file)
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cache_file.close()
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except:
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cache = {}
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# Grep
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for filename in filenames:
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file = open(filename)
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cur_mtime = os.fstat(file.fileno())[ST_MTIME]
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if cache and cache.has_key(filename):
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cdict = cache[filename]
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if cur_mtime == cdict['mtime']:
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# print "Pulling %s from cache" % (filename)
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regs['tap_reg'].extend(cdict['tap_reg'])
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file.close()
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continue
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# We don't have a cache entry
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if cache is not None:
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cache[filename] = {
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'mtime': cur_mtime,
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'tap_reg': [],
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}
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# print "Searching %s" % (filename)
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for line in file.readlines():
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for action in patterns:
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regex = action[1]
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match = regex.search(line)
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if match:
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symbol = match.group("symbol")
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sym_type = action[0]
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regs[sym_type].append(symbol)
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if cache is not None:
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# print "Caching %s for %s: %s" % (sym_type, filename, symbol)
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cache[filename][sym_type].append(symbol)
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file.close()
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if cache is not None and cache_filename is not None:
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cache_file = open(cache_filename, 'wb')
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pickle.dump(cache, cache_file)
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cache_file.close()
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# Make sure we actually processed something
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if len(regs['tap_reg']) < 1:
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print "No protocol registrations found"
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sys.exit(1)
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# Sort the lists to make them pretty
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regs['tap_reg'].sort()
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reg_code = open(tmp_filename, "w")
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reg_code.write("/* Do not modify this file. */\n")
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reg_code.write("/* It is created automatically by the Makefile. */\n")
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# Make the routine to register all taps
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reg_code.write("""
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#include "register.h"
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void register_all_tap_listeners(void) {
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""");
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for symbol in regs['tap_reg']:
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line = " {extern void %s (void); %s ();}\n" % (symbol, symbol)
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reg_code.write(line)
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reg_code.write("}\n")
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# Close the file
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reg_code.close()
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# Remove the old final_file if it exists.
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try:
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os.stat(final_filename)
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os.remove(final_filename)
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except OSError:
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pass
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# Move from tmp file to final file
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os.rename(tmp_filename, final_filename)
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