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authorJakub Hrozek <jhrozek@redhat.com>2009-11-11 13:07:45 +0100
committerStephen Gallagher <sgallagh@redhat.com>2009-11-20 11:18:47 -0500
commit157e50e23cd3f272d4c106ce4c7ebf71d95abd65 (patch)
treec92efc5f978199ed14df720fc0650fbb20e0e057
parentc4e99a892e0bcf8d432761d6df3fe06ead6aad75 (diff)
downloadsssd-157e50e23cd3f272d4c106ce4c7ebf71d95abd65.tar.gz
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Add Simo's ipachangeconf
-rw-r--r--server/Makefile.am1
-rw-r--r--server/config/ipachangeconf.py459
-rw-r--r--server/config/setup.py1
3 files changed, 461 insertions, 0 deletions
diff --git a/server/Makefile.am b/server/Makefile.am
index 08c0295e..33c4bf12 100644
--- a/server/Makefile.am
+++ b/server/Makefile.am
@@ -111,6 +111,7 @@ endif
dist_noinst_SCRIPTS = \
config/setup.py \
+ config/ipachangeconf.py \
config/SSSDConfig.py
###############################
diff --git a/server/config/ipachangeconf.py b/server/config/ipachangeconf.py
new file mode 100644
index 00000000..e083055f
--- /dev/null
+++ b/server/config/ipachangeconf.py
@@ -0,0 +1,459 @@
+#
+# ipachangeconf - configuration file manipulation classes and functions
+# partially based on authconfig code
+# Copyright (c) 1999-2007 Red Hat, Inc.
+# Author: Simo Sorce <ssorce@redhat.com>
+#
+# This is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 only
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+
+import fcntl
+import os
+import string
+import time
+import shutil
+
+def openLocked(filename, perms):
+ fd = -1
+ try:
+ fd = os.open(filename, os.O_RDWR | os.O_CREAT, perms)
+ fcntl.lockf(fd, fcntl.LOCK_EX)
+ except OSError, (errno, strerr):
+ if fd != -1:
+ try:
+ os.close(fd)
+ except OSError:
+ pass
+ raise IOError(errno, strerr)
+ return os.fdopen(fd, "r+")
+
+
+ #TODO: add subsection as a concept
+ # (ex. REALM.NAME = { foo = x bar = y } )
+ #TODO: put section delimiters as separating element of the list
+ # so that we can process multiple sections in one go
+ #TODO: add a comment all but provided options as a section option
+class IPAChangeConf:
+
+ def __init__(self, name):
+ self.progname = name
+ self.indent = ("","","")
+ self.assign = (" = ","=")
+ self.dassign = self.assign[0]
+ self.comment = ("#",)
+ self.dcomment = self.comment[0]
+ self.eol = ("\n",)
+ self.deol = self.eol[0]
+ self.sectnamdel = ("[","]")
+ self.subsectdel = ("{","}")
+ self.backup_suffix = ".ipabkp"
+
+ def setProgName(self, name):
+ self.progname = name
+
+ def setIndent(self, indent):
+ if type(indent) is tuple:
+ self.indent = indent
+ elif type(indent) is str:
+ self.indent = (indent, )
+ else:
+ raise ValueError, 'Indent must be a list of strings'
+
+ def setOptionAssignment(self, assign):
+ if type(assign) is tuple:
+ self.assign = assign
+ else:
+ self.assign = (assign, )
+ self.dassign = self.assign[0]
+
+ def setCommentPrefix(self, comment):
+ if type(comment) is tuple:
+ self.comment = comment
+ else:
+ self.comment = (comment, )
+ self.dcomment = self.comment[0]
+
+ def setEndLine(self, eol):
+ if type(eol) is tuple:
+ self.eol = eol
+ else:
+ self.eol = (eol, )
+ self.deol = self.eol[0]
+
+ def setSectionNameDelimiters(self, delims):
+ self.sectnamdel = delims
+
+ def setSubSectionDelimiters(self, delims):
+ self.subsectdel = delims
+
+ def matchComment(self, line):
+ for v in self.comment:
+ if line.lstrip().startswith(v):
+ return line.lstrip()[len(v):]
+ return False
+
+ def matchEmpty(self, line):
+ if line.strip() == "":
+ return True
+ return False
+
+ def matchSection(self, line):
+ cl = "".join(line.strip().split())
+ if len(self.sectnamdel) != 2:
+ return False
+ if not cl.startswith(self.sectnamdel[0]):
+ return False
+ if not cl.endswith(self.sectnamdel[1]):
+ return False
+ return cl[len(self.sectnamdel[0]):-len(self.sectnamdel[1])]
+
+ def matchSubSection(self, line):
+ if self.matchComment(line):
+ return False
+
+ parts = line.split(self.dassign, 1)
+ if len(parts) < 2:
+ return False
+
+ if parts[1].strip() == self.subsectdel[0]:
+ return parts[0].strip()
+
+ return False
+
+ def matchSubSectionEnd(self, line):
+ if self.matchComment(line):
+ return False
+
+ if line.strip() == self.subsectdel[1]:
+ return True
+
+ return False
+
+ def getSectionLine(self, section):
+ if len(self.sectnamdel) != 2:
+ return section
+ return self.sectnamdel[0]+section+self.sectnamdel[1]+self.deol
+
+ def dump(self, options, level=0):
+ output = ""
+ if level >= len(self.indent):
+ level = len(self.indent)-1
+
+ for o in options:
+ if o['type'] == "section":
+ output += self.sectnamdel[0]+o['name']+self.sectnamdel[1]+self.deol
+ output += self.dump(o['value'], level+1)
+ continue
+ if o['type'] == "subsection":
+ output += self.indent[level]+o['name']+self.dassign+self.subsectdel[0]+self.deol
+ output += self.dump(o['value'], level+1)
+ output += self.indent[level]+self.subsectdel[1]+self.deol
+ continue
+ if o['type'] == "option":
+ output += self.indent[level]+o['name']+self.dassign+o['value']+self.deol
+ continue
+ if o['type'] == "comment":
+ output += self.dcomment+o['value']+self.deol
+ continue
+ if o['type'] == "empty":
+ output += self.deol
+ continue
+ raise SyntaxError, 'Unknown type: ['+o['type']+']'
+
+ return output
+
+ def parseLine(self, line):
+
+ if self.matchEmpty(line):
+ return {'name':'empty', 'type':'empty'}
+
+ value = self.matchComment(line)
+ if value:
+ return {'name':'comment', 'type':'comment', 'value':value.rstrip()}
+
+ parts = line.split(self.dassign, 1)
+ if len(parts) < 2:
+ raise SyntaxError, 'Syntax Error: Unknown line format'
+
+ return {'name':parts[0].strip(), 'type':'option', 'value':parts[1].rstrip()}
+
+ def findOpts(self, opts, type, name, exclude_sections=False):
+
+ num = 0
+ for o in opts:
+ if o['type'] == type and o['name'] == name:
+ return (num, o)
+ if exclude_sections and (o['type'] == "section" or o['type'] == "subsection"):
+ return (num, None)
+ num += 1
+ return (num, None)
+
+ def commentOpts(self, inopts, level = 0):
+
+ opts = []
+
+ if level >= len(self.indent):
+ level = len(self.indent)-1
+
+ for o in inopts:
+ if o['type'] == 'section':
+ no = self.commentOpts(o['value'], level+1)
+ val = self.dcomment+self.sectnamdel[0]+o['name']+self.sectnamdel[1]
+ opts.append({'name':'comment', 'type':'comment', 'value':val})
+ for n in no:
+ opts.append(n)
+ continue
+ if o['type'] == 'subsection':
+ no = self.commentOpts(o['value'], level+1)
+ val = self.indent[level]+o['name']+self.dassign+self.subsectdel[0]
+ opts.append({'name':'comment', 'type':'comment', 'value':val})
+ for n in no:
+ opts.append(n)
+ val = self.indent[level]+self.subsectdel[1]
+ opts.append({'name':'comment', 'type':'comment', 'value':val})
+ continue
+ if o['type'] == 'option':
+ val = self.indent[level]+o['name']+self.dassign+o['value']
+ opts.append({'name':'comment', 'type':'comment', 'value':val})
+ continue
+ if o['type'] == 'comment':
+ opts.append(o)
+ continue
+ if o['type'] == 'empty':
+ opts.append({'name':'comment', 'type':'comment', 'value':''})
+ continue
+ raise SyntaxError, 'Unknown type: ['+o['type']+']'
+
+ return opts
+
+ def mergeOld(self, oldopts, newopts):
+
+ opts = []
+
+ for o in oldopts:
+ if o['type'] == "section" or o['type'] == "subsection":
+ (num, no) = self.findOpts(newopts, o['type'], o['name'])
+ if not no:
+ opts.append(o)
+ continue
+ if no['action'] == "set":
+ mo = self.mergeOld(o['value'], no['value'])
+ opts.append({'name':o['name'], 'type':o['type'], 'value':mo})
+ continue
+ if no['action'] == "comment":
+ co = self.commentOpts(o['value'])
+ for c in co:
+ opts.append(c)
+ continue
+ if no['action'] == "remove":
+ continue
+ raise SyntaxError, 'Unknown action: ['+no['action']+']'
+
+ if o['type'] == "comment" or o['type'] == "empty":
+ opts.append(o)
+ continue
+
+ if o['type'] == "option":
+ (num, no) = self.findOpts(newopts, 'option', o['name'], True)
+ if not no:
+ opts.append(o)
+ continue
+ if no['action'] == 'comment' or no['action'] == 'remove':
+ if no['value'] != None and o['value'] != no['value']:
+ opts.append(o)
+ continue
+ if no['action'] == 'comment':
+ opts.append({'name':'comment', 'type':'comment',
+ 'value':self.dcomment+o['name']+self.dassign+o['value']})
+ continue
+ if no['action'] == 'set':
+ opts.append(no)
+ continue
+ raise SyntaxError, 'Unknown action: ['+o['action']+']'
+
+ raise SyntaxError, 'Unknown type: ['+o['type']+']'
+
+ return opts
+
+ def mergeNew(self, opts, newopts):
+
+ cline = 0
+
+ for no in newopts:
+
+ if no['type'] == "section" or no['type'] == "subsection":
+ (num, o) = self.findOpts(opts, no['type'], no['name'])
+ if not o:
+ if no['action'] == 'set':
+ opts.append(no)
+ continue
+ if no['action'] == "set":
+ self.mergeNew(o['value'], no['value'])
+ continue
+ cline = num+1
+ continue
+
+ if no['type'] == "option":
+ (num, o) = self.findOpts(opts, no['type'], no['name'], True)
+ if not o:
+ if no['action'] == 'set':
+ opts.append(no)
+ continue
+ cline = num+1
+ continue
+
+ if no['type'] == "comment" or no['type'] == "empty":
+ opts.insert(cline, no)
+ cline += 1
+ continue
+
+ raise SyntaxError, 'Unknown type: ['+no['type']+']'
+
+
+ def merge(self, oldopts, newopts):
+
+ #Use a two pass strategy
+ #First we create a new opts tree from oldopts removing/commenting
+ # the options as indicated by the contents of newopts
+ #Second we fill in the new opts tree with options as indicated
+ # in the newopts tree (this is becaus eentire (sub)sections may
+ # exist in the newopts that do not exist in oldopts)
+
+ opts = self.mergeOld(oldopts, newopts)
+ self.mergeNew(opts, newopts)
+ return opts
+
+ #TODO: Make parse() recursive?
+ def parse(self, f):
+
+ opts = []
+ sectopts = []
+ section = None
+ subsectopts = []
+ subsection = None
+ curopts = opts
+ fatheropts = opts
+
+ # Read in the old file.
+ for line in f:
+
+ # It's a section start.
+ value = self.matchSection(line)
+ if value:
+ if section is not None:
+ opts.append({'name':section, 'type':'section', 'value':sectopts})
+ sectopts = []
+ curopts = sectopts
+ fatheropts = sectopts
+ section = value
+ continue
+
+ # It's a subsection start.
+ value = self.matchSubSection(line)
+ if value:
+ if subsection is not None:
+ raise SyntaxError, 'nested subsections are not supported yet'
+ subsectopts = []
+ curopts = subsectopts
+ subsection = value
+ continue
+
+ value = self.matchSubSectionEnd(line)
+ if value:
+ if subsection is None:
+ raise SyntaxError, 'Unmatched end subsection terminator found'
+ fatheropts.append({'name':subsection, 'type':'subsection', 'value':subsectopts})
+ subsection = None
+ curopts = fatheropts
+ continue
+
+ # Copy anything else as is.
+ curopts.append(self.parseLine(line))
+
+ #Add last section if any
+ if len(sectopts) is not 0:
+ opts.append({'name':section, 'type':'section', 'value':sectopts})
+
+ return opts
+
+ # Write settings to configuration file
+ # file is a path
+ # options is a set of dictionaries in the form:
+ # [{'name': 'foo', 'value': 'bar', 'action': 'set/comment'}]
+ # section is a section name like 'global'
+ def changeConf(self, file, newopts):
+ autosection = False
+ savedsection = None
+ done = False
+ output = ""
+ f = None
+ try:
+ #Do not catch an unexisting file error, we want to fail in that case
+ shutil.copy2(file, file+self.backup_suffix)
+
+ f = openLocked(file, 0644)
+
+ oldopts = self.parse(f)
+
+ options = self.merge(oldopts, newopts)
+
+ output = self.dump(options)
+
+ # Write it out and close it.
+ f.seek(0)
+ f.truncate(0)
+ f.write(output)
+ finally:
+ try:
+ if f:
+ f.close()
+ except IOError:
+ pass
+ return True
+
+ # Write settings to new file, backup old
+ # file is a path
+ # options is a set of dictionaries in the form:
+ # [{'name': 'foo', 'value': 'bar', 'action': 'set/comment'}]
+ # section is a section name like 'global'
+ def newConf(self, file, options):
+ autosection = False
+ savedsection = None
+ done = False
+ output = ""
+ f = None
+ try:
+ try:
+ shutil.copy2(file, file+self.backup_suffix)
+ except IOError, err:
+ if err.errno == 2:
+ # The orign file did not exist
+ pass
+
+ f = openLocked(file, 0644)
+
+ # Trunkate
+ f.seek(0)
+ f.truncate(0)
+
+ output = self.dump(options)
+
+ f.write(output)
+ finally:
+ try:
+ if f:
+ f.close()
+ except IOError:
+ pass
+ return True
diff --git a/server/config/setup.py b/server/config/setup.py
index 7f108a3c..46a81060 100644
--- a/server/config/setup.py
+++ b/server/config/setup.py
@@ -30,5 +30,6 @@ setup(
url='http://fedorahosted.org/sssd',
py_modules=[
'SSSDConfig',
+ 'ipachangeconf',
],
)