## This exports methods available for use by plugins for sos ## Copyright (C) 2006 Steve Conklin ### This program 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; either version 2 of the License, or ## (at your option) any later version. ## 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. # pylint: disable-msg = R0902 # pylint: disable-msg = R0904 # pylint: disable-msg = W0702 # pylint: disable-msg = W0703 # pylint: disable-msg = R0201 # pylint: disable-msg = W0611 # pylint: disable-msg = W0613 from __future__ import with_statement from sos.utilities import sos_get_command_output, import_module, grep, fileobj, tail import os import glob import re import traceback from stat import * from time import time from itertools import * import logging import urllib2 import fnmatch try: import json except ImportError: import simplejson as json def common_prefix(l1, l2, common = None): """Returns a tuple like the following: ([common, elements, from l1, and l2], [[tails, from, l1], [tails, from, l2]]) >>> common_prefix(['usr','share','foo'], ['usr','share','bar']) (['usr','share'], [['foo'], ['bar']]) """ if common is None: common = [] if len(l1) < 1 or len(l2) < 1 or l1[0] != l2[0]: return (common, [l1, l2]) return common_prefix(l1[1:], l2[1:], common+[l1[0]]) def sos_relative_path(path1, path2, sep=os.path.sep, pardir=os.path.pardir): '''Return a relative path from path1 equivalent to path path2. In particular: the empty string, if path1 == path2; path2, if path1 and path2 have no common prefix. ''' try: common, (u1, u2) = common_prefix(path1.split(sep), path2.split(sep)) except AttributeError: return path2 if not common: return path2 # leave path absolute if nothing at all in common return sep.join( [pardir]*len(u1) + u2 ) def regex_findall(regex, fname): '''Return a list of all non overlapping matches in the string(s)''' try: with fileobj(fname) as f: return re.findall(regex, f.read(), re.MULTILINE) except AttributeError: return [] def mangle_command(command): # FIXME: this can be improved mangledname = re.sub(r"^/(usr/|)(bin|sbin)/", "", command) mangledname = re.sub(r"[^\w\-\.\/]+", "_", mangledname) mangledname = re.sub(r"/", ".", mangledname).strip(" ._-")[0:64] return mangledname class PluginException(Exception): pass class Plugin(object): """ This is the base class for sosreport plugins. Plugins should subclass this and set the class variables where applicable. plugin_name is a string returned by plugin.name(). If this is set to None (the default) class_.__name__.tolower() will be returned. Be sure to set this if you are defining multiple plugins that do the same thing on different platforms. requires_root is a boolean that specifies whether or not sosreport should execute this plugin as a super user. version is a string representing the version of the plugin. This can be useful for post-collection tooling. packages (files) is an iterable of the names of packages (the paths of files) to check for before running this plugin. If any of these packages or files is found on the system, the default implementation of check_enabled will return True. """ plugin_name = None requires_root = True version = 'unversioned' packages = () files = () def __init__(self, commons): if not getattr(self, "option_list", False): self.option_list = [] self.copied_files = [] self.executed_commands = [] self.alerts = [] self.custom_text = "" self.opt_names = [] self.opt_parms = [] self.commons = commons self.forbidden_paths = [] self.copy_paths = [] self.copy_strings = [] self.collect_cmds = [] self.soslog = self.commons['soslog'] if self.commons.has_key('soslog') else logging.getLogger('sos') self.proflog = self.commons['proflog'] if self.commons.has_key('proflog') else logging.getLogger('sosprofile') # get the option list into a dictionary for opt in self.option_list: self.opt_names.append(opt[0]) self.opt_parms.append({'desc':opt[1], 'speed':opt[2], 'enabled':opt[3]}) @classmethod def name(class_): """Returns the plugin's name as a string. This should return a lowercase string. """ if class_.plugin_name: return class_.plugin_name return class_.__name__.lower() def policy(self): return self.commons["policy"] def is_installed(self, package_name): '''Is the package $package_name installed?''' return (self.policy().pkg_by_name(package_name) is not None) def do_cmd_output_sub(self, cmd, regexp, subst): '''Apply a regexp substitution to command output archived by sosreport. cmd is the command name from which output is collected (i.e. excluding parameters). The regexp can be a string or a compiled re object. The substitution string, subst, is a string that replaces each occurrence of regexp in each file collected from cmd. Internally 'cmd' is treated as a glob with a leading and trailing '*' and each matching file from the current module's command list is subjected to the replacement. This function returns the number of replacements made. ''' if self.commons['cmdlineopts'].profiler: start_time = time() globstr = '*' + cmd + '*' self.soslog.debug("substituting '%s' for '%s' in commands matching %s" % (subst, regexp, globstr)) if not self.executed_commands: return 0 try: for called in self.executed_commands: if fnmatch.fnmatch(called['exe'], globstr): path = os.path.join(self.commons['cmddir'], called['file']) self.soslog.debug("applying substitution to %s" % path) readable = self.archive.open_file(path) result, replacements = re.subn( regexp, subst, readable.read()) if replacements: self.archive.add_string(result, path) else: replacements = 0 except Exception, e: msg = 'regex substitution failed for %s in plugin %s with: "%s"' self.soslog.error(msg % (path, self.name(), e)) replacements = 0 if self.commons['cmdlineopts'].profiler: time_passed = time() - start_time self.proflog.debug("subst: %-75s time: %f" % (globstr, time_passed)) return replacements def do_file_sub(self, srcpath, regexp, subst): '''Apply a regexp substitution to a file archived by sosreport. srcpath is the path in the archive where the file can be found. regexp can be a regexp string or a compiled re object. subst is a string to replace each occurance of regexp in the content of srcpath. This function returns the number of replacements made. ''' if self.commons['cmdlineopts'].profiler: start_time = time() try: path = self._get_dest_for_srcpath(srcpath) self.soslog.debug("substituting '%s' for '%s' in %s" % (subst, regexp, path)) if not path: return 0 readable = self.archive.open_file(path) result, replacements = re.subn(regexp, subst, readable.read()) if replacements: self.archive.add_string(result, srcpath) else: replacements = 0 except Exception, e: msg = 'regex substitution failed for %s in plugin %s with: "%s"' self.soslog.error(msg % (path, self.name(), e)) replacements = 0 if self.commons['cmdlineopts'].profiler: time_passed = time() - start_time self.proflog.debug("subst : %-75s time: %f" % (srcpath, time_passed)) return replacements def do_regex_find_all(self, regex, fname): return regex_findall(regex, fname) def _path_in_path_list(self, path, path_list): for p in path_list: if p in path: return True return False def copy_symlink(self, srcpath, sub=None): # the target stored in the original symlink linkdest = os.readlink(srcpath) # absolute path to the link target absdest = os.path.normpath(os.path.join( os.path.dirname(srcpath), linkdest)) # adjust the target used inside the report to always be relative if os.path.isabs(linkdest): reldest = os.path.relpath(linkdest, os.path.dirname(srcpath)) self.soslog.debug("made link target %s relative as %s" % (linkdest, reldest)) else: reldest = linkdest self.soslog.debug( "copying link %s pointing to %s with sub=%s, isdir=%s" % (srcpath, linkdest, sub, os.path.isdir(absdest))) if os.path.isdir(absdest): self.soslog.debug("link %s is a directory, skipping..." % linkdest) return if sub: old, new = sub reldest = srcpath.replace(old, new) # use the relative target path in the tarball self.archive.add_link(reldest,srcpath) # copy the symlink target translating relative targets # to absolute paths to pass to do_copy_file_or_dir. self.soslog.debug("normalized link target %s as %s" %(linkdest, absdest)) self.do_copy_file_or_dir(absdest) self.copied_files.append({ 'srcpath':srcpath, 'dstpath':srcpath, 'symlink':"yes", 'pointsto':linkdest}) def copy_dir(self, srcpath, sub=None): for afile in os.listdir(srcpath): self.do_copy_file_or_dir(os.path.join(srcpath, afile), dest=None, sub=sub) def _get_dest_for_srcpath(self, srcpath): for copied in self.copied_files: if srcpath == copied["srcpath"]: return copied["dstpath"] return None # Methods for copying files and shelling out def do_copy_file_or_dir(self, srcpath, dest=None, sub=None): # pylint: disable-msg = R0912 # pylint: disable-msg = R0915 '''Copy file or directory to the destination tree. If a directory, then everything below it is recursively copied. A list of copied files are saved for use later in preparing a report. sub can be used to rename the destination of the file, sub should be a two-tuple of (old,new). For example if you passed in ("etc","configurations") for use against /etc/my_file.conf the file would end up at /configurations/my_file.conf. ''' if self.commons['cmdlineopts'].profiler: start_time = time() if self._path_in_path_list(srcpath, self.forbidden_paths): self.soslog.debug("%s is in the forbidden path list" % srcpath) return '' if not os.path.exists(srcpath): self.soslog.debug("file or directory %s does not exist" % srcpath) return if not dest: dest = srcpath if sub: old, new = sub dest = srcpath.replace(old, new) if os.path.islink(srcpath): self.copy_symlink(srcpath, sub=sub) return else: if os.path.isdir(srcpath): self.copy_dir(srcpath, sub=sub) return # if we get here, it's definitely a regular file (not a symlink or dir) self.soslog.debug("copying file %s to %s" % (srcpath,dest)) try: stat = os.stat(srcpath) # if not readable(srcpath) if not (stat.st_mode & 0444): # FIXME: reflect permissions in archive self.archive.add_string("", dest) else: self.archive.add_file(srcpath, dest) self.copied_files.append({ 'srcpath':srcpath, 'dstpath':dest, 'symlink':"no"}) if self.commons['cmdlineopts'].profiler: time_passed = time() - start_time self.proflog.debug("copied: %-75s time: %f" % (srcpath, time_passed)) except Exception, e: self.soslog.error("Unable to copy %s to %s" % (srcpath, dest)) self.soslog.error(traceback.format_exc()) def add_forbidden_path(self, forbiddenPath): """Specify a path to not copy, even if it's part of a copy_paths[] entry. """ # Glob case handling is such that a valid non-glob is a reduced glob for filespec in glob.glob(forbiddenPath): self.forbidden_paths.append(filespec) def get_all_options(self): """return a list of all options selected""" return (self.opt_names, self.opt_parms) def set_option(self, optionname, value): '''set the named option to value.''' for name, parms in izip(self.opt_names, self.opt_parms): if name == optionname: parms['enabled'] = value return True else: return False def option_enabled(self, optionname): '''Deprecated, use get_option() instead''' return self.get_option(optionname) def get_option(self, optionname, default=0): """Returns the first value that matches 'optionname' in parameters passed in via the command line or set via set_option or via the global_plugin_options dictionary, in that order. optionaname may be iterable, in which case the first option that matches any of the option names is returned. """ def _check(key): if hasattr(optionname, "__iter__"): return key in optionname else: return key == optionname for name, parms in izip(self.opt_names, self.opt_parms): if _check(name): val = parms['enabled'] if val != None: return val for key, value in self.commons.get('global_plugin_options', {}).iteritems(): if _check(key): return value return default def get_option_as_list(self, optionname, delimiter=",", default=None): '''Will try to return the option as a list separated by the delimiter. ''' option = self.get_option(optionname) try: opt_list = [opt.strip() for opt in option.split(delimiter)] return filter(None, opt_list) except Exception: return default def add_copy_spec_limit(self, copyspec, sizelimit=None, sub=None): """Add a file or glob but limit it to sizelimit megabytes. If fname is a single file the file will be tailed to meet sizelimit. If the first file in a glob is too large it will be tailed to meet the sizelimit. """ if not (copyspec and len(copyspec)): return False files = glob.glob(copyspec) files.sort() if len(files) == 0: return current_size = 0 limit_reached = False sizelimit *= 1024 * 1024 # in MB _file = None for _file in files: current_size += os.stat(_file)[ST_SIZE] if sizelimit and current_size > sizelimit: limit_reached = True break self.add_copy_spec(_file, sub) if limit_reached: file_name = _file if sub: old, new = sub file_name = _file.replace(old, new) if file_name[0] == os.sep: file_name = file_name.lstrip(os.sep) strfile = file_name.replace(os.path.sep, ".") + ".tailed" self.add_string_as_file(tail(_file, sizelimit), strfile) self.archive.add_link(os.path.join( os.path.relpath('/', os.path.dirname(_file)), 'sos_strings', self.name(), strfile), _file) def add_copy_specs(self, copyspecs, sub=None): for copyspec in copyspecs: self.add_copy_spec(copyspec, sub) def add_copy_spec(self, copyspec, sub=None): """Add a file specification (can be file, dir,or shell glob) to be copied into the sosreport by this module. """ if not (copyspec and len(copyspec)): # self.soslog.warning("invalid file path") return False # Glob case handling is such that a valid non-glob is a reduced glob for filespec in glob.glob(copyspec): if filespec not in self.copy_paths: self.copy_paths.append((filespec, sub)) def call_ext_prog(self, prog, timeout=300): """Execute a command independantly of the output gathering part of sosreport. """ # pylint: disable-msg = W0612 return sos_get_command_output(prog, timeout) def check_ext_prog(self, prog): """Execute a command independently of the output gathering part of sosreport and check the return code. Return True for a return code of 0 and False otherwise. """ (status, output, runtime) = self.call_ext_prog(prog) return (status == 0) def add_cmd_output(self, exe, suggest_filename=None, root_symlink=None, timeout=300): """Run a program and collect the output""" self.collect_cmds.append( (exe, suggest_filename, root_symlink, timeout) ) def get_cmd_dir(self): """Return a directory into which this module should store collected command output""" return os.path.join(self.archive.get_tmp_dir(), 'sos_commands', self.name()) def file_grep(self, regexp, *fnames): """Returns lines matched in fnames, where fnames can either be pathnames to files to grep through or open file objects to grep through line by line. """ return grep(regexp, *fnames) def mangle_command(self, exe): return mangle_command(exe) def make_command_filename(self, exe): """The internal function to build up a filename based on a command.""" outfn = os.path.join(self.commons['cmddir'], self.name(), self.mangle_command(exe)) # check for collisions if os.path.exists(outfn): inc = 2 while True: newfn = "%s_%d" % (outfn, inc) if not os.path.exists(newfn): outfn = newfn break inc +=1 return outfn def add_string_as_file(self, content, filename): """Add a string to the archive as a file named `filename`""" self.copy_strings.append((content, filename)) def get_cmd_output_now(self, exe, suggest_filename=None, root_symlink=False, timeout=300): """Execute a command and save the output to a file for inclusion in the report. """ if self.commons['cmdlineopts'].profiler: start_time = time() # pylint: disable-msg = W0612 status, shout, runtime = sos_get_command_output(exe, timeout=timeout) if (status == 127): self.soslog.info("could not run '%s': command not found" % exe) return None if suggest_filename: outfn = self.make_command_filename(suggest_filename) else: outfn = self.make_command_filename(exe) outfn_strip = outfn[len(self.commons['cmddir'])+1:] self.archive.add_string(shout, outfn) if root_symlink: self.archive.add_link(outfn, root_symlink) # save info for later self.executed_commands.append({'exe': exe, 'file':outfn_strip}) # save in our list self.commons['xmlreport'].add_command(cmdline=exe,exitcode=status,f_stdout=outfn_strip,runtime=runtime) if self.commons['cmdlineopts'].profiler: time_passed = time() - start_time self.proflog.debug("output: %-75s time: %f" % (exe, time_passed)) return outfn # For adding output def add_alert(self, alertstring): """Add an alert to the collection of alerts for this plugin. These will be displayed in the report """ self.alerts.append(alertstring) def add_custom_text(self, text): """Append text to the custom text that is included in the report. This is freeform and can include html. """ self.custom_text += text def collect(self): """Collect the data for a plugin.""" for path, sub in self.copy_paths: self.do_copy_file_or_dir(path, sub=sub) for string, file_name in self.copy_strings: try: self.archive.add_string(string, os.path.join('sos_strings', self.name(), file_name)) except Exception, e: self.soslog.debug("could not create %s, traceback follows: %s" % (file_name, e)) for progs in izip(self.collect_cmds): prog, suggest_filename, root_symlink, timeout = progs[0] self.soslog.debug("collecting output of '%s'" % prog) try: self.get_cmd_output_now(prog, suggest_filename, root_symlink, timeout) except Exception, e: self.soslog.debug("error collecting output of '%s' (%s)" % (prog, e)) def get_description(self): """ This function will return the description for the plugin""" try: return self.__doc__.strip() except: return "" def check_enabled(self): """This method will be used to verify that a plugin should execute given the condition of the underlying environment. The default implementation will return True if neither class.files or class.packages is specified. If either are specified the plugin will check for the existence of any of the supplied files or packages and return True if any exist. It is encouraged to override this method if this behavior isn't applicable. """ # some files or packages have been specified for this package if self.files or self.packages: if isinstance(self.files, basestring): self.files = [self.files] if isinstance(self.packages, basestring): self.packages = [self.packages] return (any(os.path.exists(fname) for fname in self.files) or any(self.is_installed(pkg) for pkg in self.packages)) return True def default_enabled(self): """This devices whether a plugin should be automatically loaded or only if manually specified in the command line.""" return True def setup(self): """This method must be overridden to add the copy_paths, forbidden_paths, and external programs to be collected at a minimum. """ pass def postproc(self): """ perform any postprocessing. To be replaced by a plugin if desired """ pass def report(self): """ Present all information that was gathered in an html file that allows browsing the results. """ # make this prettier html = '
\n' % self.name() # Intro html = html + "

Plugin " + self.name() + "

\n" # Files if len(self.copied_files): html = html + "

Files copied:

\n" # Command Output if len(self.executed_commands): html = html + "

Commands Executed:

\n" # Alerts if len(self.alerts): html = html + "

Alerts:

\n" # Custom Text if (self.custom_text != ""): html = html + "

Additional Information:
\n" html = html + self.custom_text + "

\n" return html class RedHatPlugin(object): """Tagging class to indicate that this plugin works with Red Hat Linux""" pass class UbuntuPlugin(object): """Tagging class to indicate that this plugin works with Ubuntu Linux""" pass class DebianPlugin(object): """Tagging class to indicate that this plugin works with Debian Linux""" pass class IndependentPlugin(object): """Tagging class that indicates this plugin can run on any platform""" pass def import_plugin(name, superclasses=None): """Import name as a module and return a list of all classes defined in that module. superclasses should be a tuple of valid superclasses to import, this defaults to (Plugin,). """ plugin_fqname = "sos.plugins.%s" % name if not superclasses: superclasses = (Plugin,) return import_module(plugin_fqname, superclasses)