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Added logic to prevent recursive includes.
Added SymbolTable.Visited to track and return files processed.
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1 parent c706b4b commit 63dd991b5505a5f69de23f6901bdf937de61d401
@tundra tundra authored on 19 Jan 2005
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 tconfpy.py
 
# Program Information
 
PROGNAME = "tconfpy"
RCSID = "$Id: tconfpy.py,v 2.110 2005/01/19 23:39:29 tundra Exp $"
RCSID = "$Id: tconfpy.py,v 2.111 2005/01/20 00:31:24 tundra Exp $"
VERSION = RCSID.split()[2]
 
# Copyright Information
 
 
class SymbolTable(object):
 
def __init__(self):
 
# Returned by the parser
self.Symbols = {}
self.DebugMsgs = []
self.ErrMsgs = []
self.WarnMsgs = []
self.LiteralLines = []
self.TotalLines = 0
self.Visited = []
 
# Anything below here is used interally and not returned
self.Templates = Template()
self.ALLOWNEWVAR = True
self.TEMPONLY = False
self.LITERALVARS = False
self.INLITERAL = False
self.DEBUG = False
self.CondStack = [["", True],] # Always has one entry as a sentinel
self.TotalLines = 0
 
# End of class 'SymbolTable'
 
class Template(object):
Messages["dPARSEDLINE"] = FILENUM + "'%s'" + PTR + "'%s'"
Messages["dREGEXMATCH"] = FILENUM + "Value '%s' Matched Regex '%s' For Variable '%s'"
Messages["dVAREXISTS"] = FILENUM + "Checking To See If Variable '%s' Exists"
Messages["dVARREF"] = FILENUM + "Variable Dereference: '%s'" + PTR + "'%s'"
Messages["dVISITED"] = "Configuration Files Processed: '%s'"
 
 
###########
# Error Literals And Messages
Messages["eEQUIVEXTRA"] = FILENUM + "Only a single '%s' Or '%s' Operator Permitted" % (EQUIV, NOTEQUIV)
Messages["eIFEXTRATXT"] = FILENUM + "Extra Text On Line. '%s' Only Accepts Variable References As Arguments"
Messages["eNOTLEGALVAL"] = FILENUM + "'%s' Not Found In List Of Legal Values For Variable '%s'"
Messages["eNOTSTRING"] = FILENUM + "%s Is Not A String Type - Ignoring"
Messages["eRECURSIVE"] = FILENUM + "Recursive .includes Forbidden"
Messages["eSTRINGLONG"] = FILENUM + "'%s' Too Long For Variable '%s'. Maximum Length Is %s"
Messages["eSTRINGSHORT"] = FILENUM + "'%s' Too Short For Variable '%s'. Minimum Length is %s"
Messages["eSYMBADCHAR"] = FILENUM + "Symbol '%s' Contains Illegal Character '%s'"
Messages["eSYMBADSTART"] = FILENUM + "Symbol '%s' Begins With An Illegal Character"
# Return the parsing results
 
if SymTable.DEBUG:
DebugMsg("dNUMLINES", (configname, SymTable.TotalLines))
DebugMsg("dVISITED", (SymTable.Visited))
# Strip out Prefefined Variables if user does not want them
if not ReturnPredefs:
def ParseFile(cfgfile, current_cfg, current_linenum):
 
global SymTable
 
linenum = 0
 
# Inhbit recursive includes
 
if cfgfile in SymTable.Visited:
 
ErrorMsg("eRECURSIVE", (current_cfg, current_linenum))
return
 
else:
SymTable.Visited.append(cfgfile)
 
try:
cf = open(cfgfile)
 
# Process and massage the configuration file
for line in cf.read().splitlines():
 
SymTable.TotalLines += 1
linenum +=1
 
# Parse this line
ParseLine(line, cfgfile, SymTable.TotalLines)
ParseLine(line, cfgfile, linenum)
 
# Close the config file
cf.close()
 
def ParseInMemory(cfglist, configname):
 
global SymTable
 
linenum = 0
SymTable.Visited.append(configname)
 
# Process and massage the configuration file
 
for line in cfglist:
 
SymTable.TotalLines += 1
linenum += 1
 
# The entry must be a string
if type(line) == TYPE_STRING:
# Parse this line
ParseLine(line, configname, SymTable.TotalLines)
ParseLine(line, configname, linenum)
 
# Anything else is a problem
else:
ErrorMsg("eNOTSTRING", (configname, SymTable.TotalLines, str(line)))
ErrorMsg("eNOTSTRING", (configname, linenum, str(line)))
 
# End of 'ParseInMemory()'