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Initial configuration library import
This commit is contained in:
Simo Sorce
parent
c7c8aa0926
commit
4702eb9075
@ -1,6 +1,5 @@
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#! /usr/bin/python -E
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# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
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# see inline
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# Authors: Simo Sorce <ssorce@redhat.com>
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#
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# Copyright (C) 2007 Red Hat
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# see file 'COPYING' for use and warranty information
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@ -19,5 +18,5 @@
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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__all__ = ["ipadiscovery"]
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__all__ = ["ipadiscovery", "ipachangeconf", "dnsclient"]
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227
ipa-client/ipaclient/ipachangeconf.py
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227
ipa-client/ipaclient/ipachangeconf.py
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#
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# ipachangeconf - configuration filke manipulation classes and functions
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# partially based on authconfig code
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# Copyright (c) 1999-2007 Red Hat, Inc.
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# Author: Simo Sorce <ssorce@redhat.com>
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#
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# This is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) 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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import fcntl
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import os
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import string
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import time
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def openLocked(filename, perms):
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fd = -1
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try:
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fd = os.open(filename, os.O_RDWR | os.O_CREAT, perms)
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fcntl.lockf(fd, fcntl.LOCK_EX)
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except OSError, (errno, strerr):
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if fd != -1:
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try:
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os.close(fd)
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except OSError:
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pass
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raise IOError(errno, strerr)
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return os.fdopen(fd, "r+")
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class IPAChangeConf:
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def __init__(self, name):
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self.progname = name
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self.optpre = (" ",)
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self.doptpre = self.optpre[0]
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self.assign = ("=",)
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self.dassign = self.assign[0]
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self.comment = ("#",)
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self.dcomment = self.comment[0]
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self.eol = ("\n",)
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self.deol = self.eol[0]
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#self.sectdel = ("[","]")
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self.sectdel = ()
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def setProgName(self, name):
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self.progname = name
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def setOptionPrefix(self, prefix):
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self.optpre = prefix
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self.doptpre = self.optpre[0]
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def setOptionAssignment(self, assign):
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self.assign = assign
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self.dassign = self.assign[0]
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def setCommentPrefix(self, comment):
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self.comment = comment
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self.dcomment = self.comment[0]
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def setEndLine(self, eol):
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self.eol = eol
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self.deol = self.eol[0]
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def setSectionDelimiters(self, delims):
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self.sectdel = delims
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def confDump(self, options):
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output = ""
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#pre conf options delimiter
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output += self.deol
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output += self.dcomment+"["+self.progname+"]--start-line--"+self.deol
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output += self.deol
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output += self.dcomment+" Generated by authconfig on " + time.strftime("%Y/%m/%d %H:%M:%S") + self.deol
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output += self.dcomment+" DO NOT EDIT THIS SECTION (delimited by --start-line--/--end-line--)"+self.deol
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output += self.dcomment+" Any modification may be deleted or altered by authconfig in future"+self.deol
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output += self.deol
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#set options
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for opt in options:
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if opt['action'] == "set":
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output += self.doptpre+opt['name']+" "+self.dassign+" "+opt['value']+self.deol
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#post conf options delimiter
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output += self.deol
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output += self.dcomment+"["+self.progname+"]--end-line--"+self.deol
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output += self.deol
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return output
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def matchAutoEnd(self, line):
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if line.endswith("]--end-line--"):
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return True
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return False
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def matchAutoStart(self, line):
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if line.endswith("]--start-line--"):
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return True
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return False
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def matchComment(self, line):
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for v in self.comment:
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if line.strip().startswith(v):
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return True
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return False
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def matchLineOption(self, line, opt):
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parts = line.split(self.dassign, 1)
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if len(parts) < 2:
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return False
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elif parts[0].split() == opt['name'].split():
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return True
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else:
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return False
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def matchSection(self, line):
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cl = "".join(line.strip().split()).lower()
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if len(self.sectdel) != 2:
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return False
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if not cl.startswith(self.sectdel[0]):
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return False
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if not cl.endswith(self.sectdel[1]):
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return False
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return cl[len(self.sectdel[0]):-len(self.sectdel[1])]
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def getSectionLine(self, section):
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if len(self.sectdel) != 2:
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return section
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return self.sectdel[0]+section+self.sectdel[1]+self.deol
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def checkLineOption(self, line, options):
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output = ""
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# Check if this is a setting we care about.
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for opt in options:
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if self.matchLineOption(line.strip(), opt):
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output = self.dcomment
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break
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output += line
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return output;
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# Write settings to configuration file
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# file is a path
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# options is a set of dictionaries in the form:
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# [{'name': 'foo', 'value': 'bar', 'action': 'set/comment'}]
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# section is a section name like 'global'
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def changeConf(self, file, options, section=None):
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autosection = False
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savedsection = None
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done = False
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output = ""
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f = None
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try:
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f = openLocked(file, 0644)
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# Read in the old file.
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for line in f:
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if autosection:
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if self.matchAutoEnd(line):
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autosection = False
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#skip all previous auto-generated lines
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continue
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if self.matchAutoStart(line):
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autosection = True
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continue
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# If it's a comment, just pass it through.
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if self.matchComment(line):
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output += line
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continue
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# If it's a section start, note the section name.
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value = self.matchSection(line)
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if value:
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# Here we are at start if a new section, if the previous one matches
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# the specified section, dump here before starting the new one
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# the comparison with section == None is intentional and matches the
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# request to dump the options at the end of an implicit initial
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# unmarked section before any section is started
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if savedsection == section:
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output += self.confDump(options)
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done = True
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savedsection = value
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output += line
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continue
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# Comment out options we care about.
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if savedsection == section:
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output += self.checkLineOption(line, options)
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continue
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# Copy anything else as is.
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output += line
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if not done:
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if section:
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output += getSectionLine(section)
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output += self.confDump(options)
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# Write it out and close it.
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f.seek(0)
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f.truncate(0)
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f.write(output)
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finally:
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try:
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if f:
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f.close()
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except IOError:
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pass
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return True
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