+#!/usr/bin/env python
+
# Utility functions
-# Copyright (C) 2000, 2001, 2002 James Troup <james@nocrew.org>
-# $Id: utils.py,v 1.47 2002-06-08 00:18:02 troup Exp $
+# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 James Troup <james@nocrew.org>
+# $Id: utils.py,v 1.73 2005-03-18 05:24:38 troup Exp $
+
+################################################################################
# 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
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-import commands, os, pwd, re, socket, shutil, string, sys, tempfile
-import apt_pkg
+################################################################################
+
+import codecs, commands, email.Header, os, pwd, re, select, socket, shutil, \
+ string, sys, tempfile, traceback;
+import apt_pkg;
+import db_access;
+
+################################################################################
re_comments = re.compile(r"\#.*")
-re_no_epoch = re.compile(r"^\d*\:")
-re_no_revision = re.compile(r"\-[^-]*$")
+re_no_epoch = re.compile(r"^\d+\:")
+re_no_revision = re.compile(r"-[^-]+$")
re_arch_from_filename = re.compile(r"/binary-[^/]+/")
re_extract_src_version = re.compile (r"(\S+)\s*\((.*)\)")
re_isadeb = re.compile (r"(.+?)_(.+?)_(.+)\.u?deb$");
re_single_line_field = re.compile(r"^(\S*)\s*:\s*(.*)");
re_multi_line_field = re.compile(r"^\s(.*)");
-re_taint_free = re.compile(r"^[-+\.\w]+$");
+re_taint_free = re.compile(r"^[-+~/\.\w]+$");
-re_parse_maintainer = re.compile(r"^\s*(\S.*\S)\s*\<([^\> \t]+)\>");
+re_parse_maintainer = re.compile(r"^\s*(\S.*\S)\s*\<([^\>]+)\>");
changes_parse_error_exc = "Can't parse line in .changes file";
invalid_dsc_format_exc = "Invalid .dsc file";
nk_format_exc = "Unknown Format: in .changes file";
-no_files_exc = "No Files: field in .dsc file.";
-cant_open_exc = "Can't read file.";
+no_files_exc = "No Files: field in .dsc or .changes file.";
+cant_open_exc = "Can't open file";
unknown_hostname_exc = "Unknown hostname";
cant_overwrite_exc = "Permission denied; can't overwrite existent file."
file_exists_exc = "Destination file exists";
-send_mail_invalid_args_exc = "Both arguments are non-null.";
sendmail_failed_exc = "Sendmail invocation failed";
tried_too_hard_exc = "Tried too hard to find a free filename.";
default_config = "/etc/katie/katie.conf";
default_apt_config = "/etc/katie/apt.conf";
-######################################################################################
+################################################################################
+
+class Error(Exception):
+ """Base class for exceptions in this module."""
+ pass;
+
+class ParseMaintError(Error):
+ """Exception raised for errors in parsing a maintainer field.
+
+ Attributes:
+ message -- explanation of the error
+ """
+
+ def __init__(self, message):
+ self.args = message,;
+ self.message = message;
+
+################################################################################
def open_file(filename, mode='r'):
try:
f = open(filename, mode);
except IOError:
- raise cant_open_exc, filename
+ raise cant_open_exc, filename;
return f
-######################################################################################
+################################################################################
def our_raw_input(prompt=""):
if prompt:
sys.stdout.flush();
try:
ret = raw_input();
- return ret
+ return ret;
except EOFError:
- sys.stderr.write('\nUser interrupt (^D).\n');
+ sys.stderr.write("\nUser interrupt (^D).\n");
raise SystemExit;
-######################################################################################
+################################################################################
def str_isnum (s):
for c in s:
return 0;
return 1;
-######################################################################################
+################################################################################
def extract_component_from_section(section):
component = "";
- if string.find(section, '/') != -1:
- component = string.split(section, '/')[0];
- if string.lower(component) == "non-us" and string.count(section, '/') > 0:
- s = component + '/' + string.split(section, '/')[1];
+ if section.find('/') != -1:
+ component = section.split('/')[0];
+ if component.lower() == "non-us" and section.find('/') != -1:
+ s = component + '/' + section.split('/')[1];
if Cnf.has_key("Component::%s" % s): # Avoid e.g. non-US/libs
component = s;
- if string.lower(section) == "non-us":
+ if section.lower() == "non-us":
component = "non-US/main";
# non-US prefix is case insensitive
- if string.lower(component)[:6] == "non-us":
+ if component.lower()[:6] == "non-us":
component = "non-US"+component[6:];
# Expand default component
return (section, component);
-######################################################################################
-
-# dsc_whitespace_rules turns on strict format checking to avoid
-# allowing in source packages which are unextracable by the
-# inappropriately fragile dpkg-source.
-#
-# The rules are:
-#
-#
-# o The PGP header consists of "-----BEGIN PGP SIGNED MESSAGE-----"
-# followed by any PGP header data and must end with a blank line.
-#
-# o The data section must end with a blank line and must be followed by
-# "-----BEGIN PGP SIGNATURE-----".
-
-def parse_changes(filename, dsc_whitespace_rules=0):
- changes_in = open_file(filename);
+################################################################################
+
+def parse_changes(filename, signing_rules=0):
+ """Parses a changes file and returns a dictionary where each field is a
+key. The mandatory first argument is the filename of the .changes
+file.
+
+signing_rules is an optional argument:
+
+ o If signing_rules == -1, no signature is required.
+ o If signing_rules == 0 (the default), a signature is required.
+ o If signing_rules == 1, it turns on the same strict format checking
+ as dpkg-source.
+
+The rules for (signing_rules == 1)-mode are:
+
+ o The PGP header consists of "-----BEGIN PGP SIGNED MESSAGE-----"
+ followed by any PGP header data and must end with a blank line.
+
+ o The data section must end with a blank line and must be followed by
+ "-----BEGIN PGP SIGNATURE-----".
+"""
+
error = "";
changes = {};
+
+ changes_in = open_file(filename);
lines = changes_in.readlines();
if not lines:
index = 0;
indexed_lines = {};
for line in lines:
- index = index + 1;
+ index += 1;
indexed_lines[index] = line[:-1];
inside_signature = 0;
- indices = indexed_lines.keys()
+ num_of_lines = len(indexed_lines.keys());
index = 0;
- while index < max(indices):
- index = index + 1;
+ first = -1;
+ while index < num_of_lines:
+ index += 1;
line = indexed_lines[index];
if line == "":
- if dsc_whitespace_rules:
- index = index + 1;
- if index > max(indices):
+ if signing_rules == 1:
+ index += 1;
+ if index > num_of_lines:
raise invalid_dsc_format_exc, index;
line = indexed_lines[index];
- if string.find(line, "-----BEGIN PGP SIGNATURE") != 0:
+ if not line.startswith("-----BEGIN PGP SIGNATURE"):
raise invalid_dsc_format_exc, index;
inside_signature = 0;
break;
- if string.find(line, "-----BEGIN PGP SIGNATURE") == 0:
+ else:
+ continue;
+ if line.startswith("-----BEGIN PGP SIGNATURE"):
break;
- if string.find(line, "-----BEGIN PGP SIGNED MESSAGE") == 0:
- if dsc_whitespace_rules:
- inside_signature = 1;
- while index < max(indices) and line != "":
- index = index + 1;
+ if line.startswith("-----BEGIN PGP SIGNED MESSAGE"):
+ inside_signature = 1;
+ if signing_rules == 1:
+ while index < num_of_lines and line != "":
+ index += 1;
line = indexed_lines[index];
continue;
+ # If we're not inside the signed data, don't process anything
+ if signing_rules >= 0 and not inside_signature:
+ continue;
slf = re_single_line_field.match(line);
if slf:
- field = string.lower(slf.groups()[0]);
+ field = slf.groups()[0].lower();
changes[field] = slf.groups()[1];
first = 1;
continue;
if line == " .":
- changes[field] = changes[field] + '\n';
+ changes[field] += '\n';
continue;
mlf = re_multi_line_field.match(line);
if mlf:
+ if first == -1:
+ raise changes_parse_error_exc, "'%s'\n [Multi-line field continuing on from nothing?]" % (line);
if first == 1 and changes[field] != "":
- changes[field] = changes[field] + '\n';
+ changes[field] += '\n';
first = 0;
- changes[field] = changes[field] + mlf.groups()[0] + '\n';
+ changes[field] += mlf.groups()[0] + '\n';
continue;
- error = error + line;
+ error += line;
- if dsc_whitespace_rules and inside_signature:
+ if signing_rules == 1 and inside_signature:
raise invalid_dsc_format_exc, index;
changes_in.close();
- changes["filecontents"] = string.join (lines, "");
+ changes["filecontents"] = "".join(lines);
- if error != "":
+ if error:
raise changes_parse_error_exc, error;
return changes;
-######################################################################################
+################################################################################
# Dropped support for 1.4 and ``buggy dchanges 3.4'' (?!) compared to di.pl
def build_file_list(changes, is_a_dsc=0):
- files = {}
- format = changes.get("format", "")
+ files = {};
+
+ # Make sure we have a Files: field to parse...
+ if not changes.has_key("files"):
+ raise no_files_exc;
+
+ # Make sure we recognise the format of the Files: field
+ format = changes.get("format", "");
if format != "":
- format = float(format)
+ format = float(format);
if not is_a_dsc and (format < 1.5 or format > 2.0):
raise nk_format_exc, format;
- # No really, this has happened. Think 0 length .dsc file.
- if not changes.has_key("files"):
- raise no_files_exc
-
- for i in string.split(changes["files"], "\n"):
- if i == "":
- break
- s = string.split(i)
+ # Parse each entry/line:
+ for i in changes["files"].split('\n'):
+ if not i:
+ break;
+ s = i.split();
section = priority = "";
try:
if is_a_dsc:
- (md5, size, name) = s
+ (md5, size, name) = s;
else:
- (md5, size, section, priority, name) = s
+ (md5, size, section, priority, name) = s;
except ValueError:
- raise changes_parse_error_exc, i
+ raise changes_parse_error_exc, i;
- if section == "": section = "-"
- if priority == "": priority = "-"
+ if section == "":
+ section = "-";
+ if priority == "":
+ priority = "-";
(section, component) = extract_component_from_section(section);
- files[name] = { "md5sum" : md5,
- "size" : size,
- "section": section,
- "priority": priority,
- "component": component }
+ files[name] = Dict(md5sum=md5, size=size, section=section,
+ priority=priority, component=component);
return files
-######################################################################################
+################################################################################
+
+def force_to_utf8(s):
+ """Forces a string to UTF-8. If the string isn't already UTF-8,
+it's assumed to be ISO-8859-1."""
+ try:
+ unicode(s, 'utf-8');
+ return s;
+ except UnicodeError:
+ latin1_s = unicode(s,'iso8859-1');
+ return latin1_s.encode('utf-8');
+
+def rfc2047_encode(s):
+ """Encodes a (header) string per RFC2047 if necessary. If the
+string is neither ASCII nor UTF-8, it's assumed to be ISO-8859-1."""
+ try:
+ codecs.lookup('ascii')[1](s)
+ return s;
+ except UnicodeError:
+ pass;
+ try:
+ codecs.lookup('utf-8')[1](s)
+ h = email.Header.Header(s, 'utf-8', 998);
+ return str(h);
+ except UnicodeError:
+ h = email.Header.Header(s, 'iso-8859-1', 998);
+ return str(h);
+
+################################################################################
-# Fix the `Maintainer:' field to be an RFC822 compatible address.
-# cf. Packaging Manual (4.2.4)
-#
-# 06:28|<Culus> 'The standard sucks, but my tool is supposed to
-# interoperate with it. I know - I'll fix the suckage
-# and make things incompatible!'
+# <Culus> 'The standard sucks, but my tool is supposed to interoperate
+# with it. I know - I'll fix the suckage and make things
+# incompatible!'
def fix_maintainer (maintainer):
- m = re_parse_maintainer.match(maintainer);
- rfc822 = maintainer
- name = ""
- email = ""
- if m != None and len(m.groups()) == 2:
- name = m.group(1)
- email = m.group(2)
- if string.find(name, ',') != -1 or string.find(name, '.') != -1:
- rfc822 = re_parse_maintainer.sub(r"\2 (\1)", maintainer)
- return (rfc822, name, email)
-
-######################################################################################
+ """Parses a Maintainer or Changed-By field and returns:
+ (1) an RFC822 compatible version,
+ (2) an RFC2047 compatible version,
+ (3) the name
+ (4) the email
+
+The name is forced to UTF-8 for both (1) and (3). If the name field
+contains '.' or ',' (as allowed by Debian policy), (1) and (2) are
+switched to 'email (name)' format."""
+ maintainer = maintainer.strip()
+ if not maintainer:
+ return ('', '', '', '');
+
+ if maintainer.find("<") == -1:
+ email = maintainer;
+ name = "";
+ elif (maintainer[0] == "<" and maintainer[-1:] == ">"):
+ email = maintainer[1:-1];
+ name = "";
+ else:
+ m = re_parse_maintainer.match(maintainer);
+ if not m:
+ raise ParseMaintError, "Doesn't parse as a valid Maintainer field."
+ name = m.group(1);
+ email = m.group(2);
-# sendmail wrapper, takes _either_ a message string or a file as arguments
-def send_mail (message, filename):
- # Sanity check arguments
- if message != "" and filename != "":
- raise send_mail_invalid_args_exc;
+ # Get an RFC2047 compliant version of the name
+ rfc2047_name = rfc2047_encode(name);
+
+ # Force the name to be UTF-8
+ name = force_to_utf8(name);
+
+ if name.find(',') != -1 or name.find('.') != -1:
+ rfc822_maint = "%s (%s)" % (email, name);
+ rfc2047_maint = "%s (%s)" % (email, rfc2047_name);
+ else:
+ rfc822_maint = "%s <%s>" % (name, email);
+ rfc2047_maint = "%s <%s>" % (rfc2047_name, email);
+
+ if email.find("@") == -1 and email.find("buildd_") != 0:
+ raise ParseMaintError, "No @ found in email address part."
+
+ return (rfc822_maint, rfc2047_maint, name, email);
+
+################################################################################
+# sendmail wrapper, takes _either_ a message string or a file as arguments
+def send_mail (message, filename=""):
# If we've been passed a string dump it into a temporary file
- if message != "":
+ if message:
filename = tempfile.mktemp();
fd = os.open(filename, os.O_RDWR|os.O_CREAT|os.O_EXCL, 0700);
os.write (fd, message);
raise sendmail_failed_exc, output;
# Clean up any temporary files
- if message !="":
+ if message:
os.unlink (filename);
-######################################################################################
+################################################################################
def poolify (source, component):
- if component != "":
- component = component + '/';
+ if component:
+ component += '/';
# FIXME: this is nasty
- component = string.lower(component);
- component = string.replace(component, 'non-us/', 'non-US/');
+ component = component.lower().replace("non-us/", "non-US/");
if source[:3] == "lib":
return component + source[:4] + '/' + source + '/'
else:
return component + source[:1] + '/' + source + '/'
-######################################################################################
+################################################################################
def move (src, dest, overwrite = 0, perms = 0664):
if os.path.exists(dest) and os.path.isdir(dest):
os.umask(umask);
#print "Moving %s to %s..." % (src, dest);
if os.path.exists(dest) and os.path.isdir(dest):
- dest = dest + '/' + os.path.basename(src);
+ dest += '/' + os.path.basename(src);
# Don't overwrite unless forced to
if os.path.exists(dest):
if not overwrite:
- raise file_exists_exc;
+ fubar("Can't move %s to %s - file already exists." % (src, dest));
else:
if not os.access(dest, os.W_OK):
- raise cant_overwrite_exc
+ fubar("Can't move %s to %s - can't write to existing file." % (src, dest));
shutil.copy2(src, dest);
os.chmod(dest, perms);
os.unlink(src);
os.umask(umask);
#print "Copying %s to %s..." % (src, dest);
if os.path.exists(dest) and os.path.isdir(dest):
- dest = dest + '/' + os.path.basename(src);
+ dest += '/' + os.path.basename(src);
# Don't overwrite unless forced to
if os.path.exists(dest):
if not overwrite:
shutil.copy2(src, dest);
os.chmod(dest, perms);
-######################################################################################
+################################################################################
def where_am_i ():
res = socket.gethostbyaddr(socket.gethostname());
else:
return default_apt_config;
-######################################################################################
+################################################################################
# Escape characters which have meaning to SQL's regex comparison operator ('~')
# (woefully incomplete)
def regex_safe (s):
- s = string.replace(s, '+', '\\\\+');
- s = string.replace(s, '.', '\\\\.');
+ s = s.replace('+', '\\\\+');
+ s = s.replace('.', '\\\\.');
return s
-######################################################################################
+################################################################################
# Perform a substition of template
def TemplateSubst(map, filename):
file = open_file(filename);
template = file.read();
for x in map.keys():
- template = string.replace(template,x,map[x]);
+ template = template.replace(x,map[x]);
file.close();
return template;
-######################################################################################
+################################################################################
def fubar(msg, exit_code=1):
sys.stderr.write("E: %s\n" % (msg));
def warn(msg):
sys.stderr.write("W: %s\n" % (msg));
-######################################################################################
+################################################################################
# Returns the user name with a laughable attempt at rfc822 conformancy
# (read: removing stray periods).
def whoami ():
- return string.replace(string.split(pwd.getpwuid(os.getuid())[4],',')[0], '.', '');
+ return pwd.getpwuid(os.getuid())[4].split(',')[0].replace('.', '');
-######################################################################################
+################################################################################
def size_type (c):
- t = " b";
- if c > 10000:
- c = c / 1000;
- t = " Kb";
- if c > 10000:
- c = c / 1000;
- t = " Mb";
+ t = " B";
+ if c > 10240:
+ c = c / 1024;
+ t = " KB";
+ if c > 10240:
+ c = c / 1024;
+ t = " MB";
return ("%d%s" % (c, t))
################################################################################
def cc_fix_changes (changes):
- o = changes.get("architecture", "")
- if o != "":
- del changes["architecture"]
- changes["architecture"] = {}
- for j in string.split(o):
- changes["architecture"][j] = 1
+ o = changes.get("architecture", "");
+ if o:
+ del changes["architecture"];
+ changes["architecture"] = {};
+ for j in o.split():
+ changes["architecture"][j] = 1;
# Sort by source name, source version, 'have source', and then by filename
def changes_compare (a, b):
return q;
# Sort by source version
- a_version = a_changes.get("version");
- b_version = b_changes.get("version");
+ a_version = a_changes.get("version", "0");
+ b_version = b_changes.get("version", "0");
q = apt_pkg.VersionCompare(a_version, b_version);
if q:
return q;
orig_dest = dest;
while os.path.exists(dest) and extra < too_many:
dest = orig_dest + '.' + repr(extra);
- extra = extra + 1;
+ extra += 1;
if extra >= too_many:
raise tried_too_hard_exc;
return dest;
list.append("");
else:
list.append(original[i]);
- return string.join(list, sep);
+ return sep.join(list);
################################################################################
-def prefix_multi_line_string(str, prefix):
+def prefix_multi_line_string(str, prefix, include_blank_lines=0):
out = "";
- for line in string.split(str, '\n'):
- line = string.strip(line);
- if line:
- out = out + "%s%s\n" % (prefix, line);
+ for line in str.split('\n'):
+ line = line.strip();
+ if line or include_blank_lines:
+ out += "%s%s\n" % (prefix, line);
# Strip trailing new line
if out:
out = out[:-1];
################################################################################
-def validate_changes_file_arg(file, fatal=1):
+def validate_changes_file_arg(filename, require_changes=1):
+ """'filename' is either a .changes or .katie file. If 'filename' is a
+.katie file, it's changed to be the corresponding .changes file. The
+function then checks if the .changes file a) exists and b) is
+readable and returns the .changes filename if so. If there's a
+problem, the next action depends on the option 'require_changes'
+argument:
+
+ o If 'require_changes' == -1, errors are ignored and the .changes
+ filename is returned.
+ o If 'require_changes' == 0, a warning is given and 'None' is returned.
+ o If 'require_changes' == 1, a fatal error is raised.
+"""
error = None;
- orig_filename = file
- if file[-6:] == ".katie":
- file = file[:-6]+".changes";
+ orig_filename = filename
+ if filename.endswith(".katie"):
+ filename = filename[:-6]+".changes";
- if file[-8:] != ".changes":
+ if not filename.endswith(".changes"):
error = "invalid file type; not a changes file";
else:
- if not os.access(file,os.R_OK):
- if os.path.exists(file):
+ if not os.access(filename,os.R_OK):
+ if os.path.exists(filename):
error = "permission denied";
else:
error = "file not found";
if error:
- if fatal:
+ if require_changes == 1:
fubar("%s: %s." % (orig_filename, error));
- else:
+ elif require_changes == 0:
warn("Skipping %s - %s" % (orig_filename, error));
return None;
+ else: # We only care about the .katie file
+ return filename;
else:
- return file;
+ return filename;
################################################################################
################################################################################
+def join_with_commas_and(list):
+ if len(list) == 0: return "nothing";
+ if len(list) == 1: return list[0];
+ return ", ".join(list[:-1]) + " and " + list[-1];
+
+################################################################################
+
+def pp_deps (deps):
+ pp_deps = [];
+ for atom in deps:
+ (pkg, version, constraint) = atom;
+ if constraint:
+ pp_dep = "%s (%s %s)" % (pkg, constraint, version);
+ else:
+ pp_dep = pkg;
+ pp_deps.append(pp_dep);
+ return " |".join(pp_deps);
+
+################################################################################
+
def get_conf():
return Cnf;
################################################################################
-apt_pkg.init()
+# Handle -a, -c and -s arguments; returns them as SQL constraints
+def parse_args(Options):
+ # Process suite
+ if Options["Suite"]:
+ suite_ids_list = [];
+ for suite in split_args(Options["Suite"]):
+ suite_id = db_access.get_suite_id(suite);
+ if suite_id == -1:
+ warn("suite '%s' not recognised." % (suite));
+ else:
+ suite_ids_list.append(suite_id);
+ if suite_ids_list:
+ con_suites = "AND su.id IN (%s)" % ", ".join(map(str, suite_ids_list));
+ else:
+ fubar("No valid suite given.");
+ else:
+ con_suites = "";
+
+ # Process component
+ if Options["Component"]:
+ component_ids_list = [];
+ for component in split_args(Options["Component"]):
+ component_id = db_access.get_component_id(component);
+ if component_id == -1:
+ warn("component '%s' not recognised." % (component));
+ else:
+ component_ids_list.append(component_id);
+ if component_ids_list:
+ con_components = "AND c.id IN (%s)" % ", ".join(map(str, component_ids_list));
+ else:
+ fubar("No valid component given.");
+ else:
+ con_components = "";
+
+ # Process architecture
+ con_architectures = "";
+ if Options["Architecture"]:
+ arch_ids_list = [];
+ check_source = 0;
+ for architecture in split_args(Options["Architecture"]):
+ if architecture == "source":
+ check_source = 1;
+ else:
+ architecture_id = db_access.get_architecture_id(architecture);
+ if architecture_id == -1:
+ warn("architecture '%s' not recognised." % (architecture));
+ else:
+ arch_ids_list.append(architecture_id);
+ if arch_ids_list:
+ con_architectures = "AND a.id IN (%s)" % ", ".join(map(str, arch_ids_list));
+ else:
+ if not check_source:
+ fubar("No valid architecture given.");
+ else:
+ check_source = 1;
+
+ return (con_suites, con_architectures, con_components, check_source);
+
+################################################################################
+
+# Inspired(tm) by Bryn Keller's print_exc_plus (See
+# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52215)
+
+def print_exc():
+ tb = sys.exc_info()[2];
+ while tb.tb_next:
+ tb = tb.tb_next;
+ stack = [];
+ frame = tb.tb_frame;
+ while frame:
+ stack.append(frame);
+ frame = frame.f_back;
+ stack.reverse();
+ traceback.print_exc();
+ for frame in stack:
+ print "\nFrame %s in %s at line %s" % (frame.f_code.co_name,
+ frame.f_code.co_filename,
+ frame.f_lineno);
+ for key, value in frame.f_locals.items():
+ print "\t%20s = " % key,;
+ try:
+ print value;
+ except:
+ print "<unable to print>";
+
+################################################################################
+
+def try_with_debug(function):
+ try:
+ function();
+ except SystemExit:
+ raise;
+ except:
+ print_exc();
+
+################################################################################
+
+# Function for use in sorting lists of architectures.
+# Sorts normally except that 'source' dominates all others.
+
+def arch_compare_sw (a, b):
+ if a == "source" and b == "source":
+ return 0;
+ elif a == "source":
+ return -1;
+ elif b == "source":
+ return 1;
+
+ return cmp (a, b);
+
+################################################################################
+
+# Split command line arguments which can be separated by either commas
+# or whitespace. If dwim is set, it will complain about string ending
+# in comma since this usually means someone did 'madison -a i386, m68k
+# foo' or something and the inevitable confusion resulting from 'm68k'
+# being treated as an argument is undesirable.
+
+def split_args (s, dwim=1):
+ if s.find(",") == -1:
+ return s.split();
+ else:
+ if s[-1:] == "," and dwim:
+ fubar("split_args: found trailing comma, spurious space maybe?");
+ return s.split(",");
+
+################################################################################
+
+def Dict(**dict): return dict
+
+########################################
+
+# Our very own version of commands.getouputstatus(), hacked to support
+# gpgv's status fd.
+def gpgv_get_status_output(cmd, status_read, status_write):
+ cmd = ['/bin/sh', '-c', cmd];
+ p2cread, p2cwrite = os.pipe();
+ c2pread, c2pwrite = os.pipe();
+ errout, errin = os.pipe();
+ pid = os.fork();
+ if pid == 0:
+ # Child
+ os.close(0);
+ os.close(1);
+ os.dup(p2cread);
+ os.dup(c2pwrite);
+ os.close(2);
+ os.dup(errin);
+ for i in range(3, 256):
+ if i != status_write:
+ try:
+ os.close(i);
+ except:
+ pass;
+ try:
+ os.execvp(cmd[0], cmd);
+ finally:
+ os._exit(1);
+
+ # Parent
+ os.close(p2cread)
+ os.dup2(c2pread, c2pwrite);
+ os.dup2(errout, errin);
+
+ output = status = "";
+ while 1:
+ i, o, e = select.select([c2pwrite, errin, status_read], [], []);
+ more_data = [];
+ for fd in i:
+ r = os.read(fd, 8196);
+ if len(r) > 0:
+ more_data.append(fd);
+ if fd == c2pwrite or fd == errin:
+ output += r;
+ elif fd == status_read:
+ status += r;
+ else:
+ fubar("Unexpected file descriptor [%s] returned from select\n" % (fd));
+ if not more_data:
+ pid, exit_status = os.waitpid(pid, 0)
+ try:
+ os.close(status_write);
+ os.close(status_read);
+ os.close(c2pread);
+ os.close(c2pwrite);
+ os.close(p2cwrite);
+ os.close(errin);
+ os.close(errout);
+ except:
+ pass;
+ break;
+
+ return output, status, exit_status;
+
+############################################################
+
+
+def check_signature (sig_filename, reject, data_filename="", keyrings=None):
+ """Check the signature of a file and return the fingerprint if the
+signature is valid or 'None' if it's not. The first argument is the
+filename whose signature should be checked. The second argument is a
+reject function and is called when an error is found. The reject()
+function must allow for two arguments: the first is the error message,
+the second is an optional prefix string. It's possible for reject()
+to be called more than once during an invocation of check_signature().
+The third argument is optional and is the name of the files the
+detached signature applies to. The fourth argument is optional and is
+a *list* of keyrings to use.
+"""
+
+ # Ensure the filename contains no shell meta-characters or other badness
+ if not re_taint_free.match(sig_filename):
+ reject("!!WARNING!! tainted signature filename: '%s'." % (sig_filename));
+ return None;
+
+ if data_filename and not re_taint_free.match(data_filename):
+ reject("!!WARNING!! tainted data filename: '%s'." % (data_filename));
+ return None;
+
+ if not keyrings:
+ keyrings = (Cnf["Dinstall::PGPKeyring"], Cnf["Dinstall::GPGKeyring"])
+
+ # Build the command line
+ status_read, status_write = os.pipe();
+ cmd = "gpgv --status-fd %s" % (status_write);
+ for keyring in keyrings:
+ cmd += " --keyring %s" % (keyring);
+ cmd += " %s %s" % (sig_filename, data_filename);
+ # Invoke gpgv on the file
+ (output, status, exit_status) = gpgv_get_status_output(cmd, status_read, status_write);
+
+ # Process the status-fd output
+ keywords = {};
+ bad = internal_error = "";
+ for line in status.split('\n'):
+ line = line.strip();
+ if line == "":
+ continue;
+ split = line.split();
+ if len(split) < 2:
+ internal_error += "gpgv status line is malformed (< 2 atoms) ['%s'].\n" % (line);
+ continue;
+ (gnupg, keyword) = split[:2];
+ if gnupg != "[GNUPG:]":
+ internal_error += "gpgv status line is malformed (incorrect prefix '%s').\n" % (gnupg);
+ continue;
+ args = split[2:];
+ if keywords.has_key(keyword) and (keyword != "NODATA" and keyword != "SIGEXPIRED"):
+ internal_error += "found duplicate status token ('%s').\n" % (keyword);
+ continue;
+ else:
+ keywords[keyword] = args;
+
+ # If we failed to parse the status-fd output, let's just whine and bail now
+ if internal_error:
+ reject("internal error while performing signature check on %s." % (sig_filename));
+ reject(internal_error, "");
+ reject("Please report the above errors to the Archive maintainers by replying to this mail.", "");
+ return None;
+
+ # Now check for obviously bad things in the processed output
+ if keywords.has_key("SIGEXPIRED"):
+ reject("The key used to sign %s has expired." % (sig_filename));
+ bad = 1;
+ if keywords.has_key("KEYREVOKED"):
+ reject("The key used to sign %s has been revoked." % (sig_filename));
+ bad = 1;
+ if keywords.has_key("BADSIG"):
+ reject("bad signature on %s." % (sig_filename));
+ bad = 1;
+ if keywords.has_key("ERRSIG") and not keywords.has_key("NO_PUBKEY"):
+ reject("failed to check signature on %s." % (sig_filename));
+ bad = 1;
+ if keywords.has_key("NO_PUBKEY"):
+ args = keywords["NO_PUBKEY"];
+ if len(args) >= 1:
+ key = args[0];
+ reject("The key (0x%s) used to sign %s wasn't found in the keyring(s)." % (key, sig_filename));
+ bad = 1;
+ if keywords.has_key("BADARMOR"):
+ reject("ASCII armour of signature was corrupt in %s." % (sig_filename));
+ bad = 1;
+ if keywords.has_key("NODATA"):
+ reject("no signature found in %s." % (sig_filename));
+ bad = 1;
+
+ if bad:
+ return None;
+
+ # Next check gpgv exited with a zero return code
+ if exit_status:
+ reject("gpgv failed while checking %s." % (sig_filename));
+ if status.strip():
+ reject(prefix_multi_line_string(status, " [GPG status-fd output:] "), "");
+ else:
+ reject(prefix_multi_line_string(output, " [GPG output:] "), "");
+ return None;
+
+ # Sanity check the good stuff we expect
+ if not keywords.has_key("VALIDSIG"):
+ reject("signature on %s does not appear to be valid [No VALIDSIG]." % (sig_filename));
+ bad = 1;
+ else:
+ args = keywords["VALIDSIG"];
+ if len(args) < 1:
+ reject("internal error while checking signature on %s." % (sig_filename));
+ bad = 1;
+ else:
+ fingerprint = args[0];
+ if not keywords.has_key("GOODSIG"):
+ reject("signature on %s does not appear to be valid [No GOODSIG]." % (sig_filename));
+ bad = 1;
+ if not keywords.has_key("SIG_ID"):
+ reject("signature on %s does not appear to be valid [No SIG_ID]." % (sig_filename));
+ bad = 1;
+
+ # Finally ensure there's not something we don't recognise
+ known_keywords = Dict(VALIDSIG="",SIG_ID="",GOODSIG="",BADSIG="",ERRSIG="",
+ SIGEXPIRED="",KEYREVOKED="",NO_PUBKEY="",BADARMOR="",
+ NODATA="");
+
+ for keyword in keywords.keys():
+ if not known_keywords.has_key(keyword):
+ reject("found unknown status token '%s' from gpgv with args '%r' in %s." % (keyword, keywords[keyword], sig_filename));
+ bad = 1;
+
+ if bad:
+ return None;
+ else:
+ return fingerprint;
+
+################################################################################
+
+# Inspired(tm) by http://www.zopelabs.com/cookbook/1022242603
+
+def wrap(paragraph, max_length, prefix=""):
+ line = "";
+ s = "";
+ have_started = 0;
+ words = paragraph.split();
+
+ for word in words:
+ word_size = len(word);
+ if word_size > max_length:
+ if have_started:
+ s += line + '\n' + prefix;
+ s += word + '\n' + prefix;
+ else:
+ if have_started:
+ new_length = len(line) + word_size + 1;
+ if new_length > max_length:
+ s += line + '\n' + prefix;
+ line = word;
+ else:
+ line += ' ' + word;
+ else:
+ line = word;
+ have_started = 1;
+
+ if have_started:
+ s += line;
+
+ return s;
+
+################################################################################
+
+# Relativize an absolute symlink from 'src' -> 'dest' relative to 'root'.
+# Returns fixed 'src'
+def clean_symlink (src, dest, root):
+ src = src.replace(root, '', 1);
+ dest = dest.replace(root, '', 1);
+ dest = os.path.dirname(dest);
+ new_src = '../' * len(dest.split('/'));
+ return new_src + src;
+
+################################################################################
+
+def temp_filename(directory=None, dotprefix=None, perms=0700):
+ """Return a secure and unique filename by pre-creating it.
+If 'directory' is non-null, it will be the directory the file is pre-created in.
+If 'dotprefix' is non-null, the filename will be prefixed with a '.'."""
+
+ if directory:
+ old_tempdir = tempfile.tempdir;
+ tempfile.tempdir = directory;
+
+ filename = tempfile.mktemp();
+
+ if dotprefix:
+ filename = "%s/.%s" % (os.path.dirname(filename), os.path.basename(filename));
+ fd = os.open(filename, os.O_RDWR|os.O_CREAT|os.O_EXCL, perms);
+ os.close(fd);
+
+ if directory:
+ tempfile.tempdir = old_tempdir;
+
+ return filename;
+
+################################################################################
+
+apt_pkg.init();
Cnf = apt_pkg.newConfiguration();
apt_pkg.ReadConfigFileISC(Cnf,default_config);
if which_conf_file() != default_config:
- apt_pkg.ReadConfigFileISC(Cnf,which_conf_file())
+ apt_pkg.ReadConfigFileISC(Cnf,which_conf_file());
################################################################################
projects / dak.git / blobdiff