+# 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();