1 # This module is part of debbugs, and is released
2 # under the terms of the GPL version 2, or any later
3 # version at your option.
4 # See the file README and COPYING for more information.
6 # [Other people have contributed to this file; their copyrights should
8 # Copyright 2007 by Don Armstrong <don@donarmstrong.com>.
10 package Debbugs::Common;
14 Debbugs::Common -- Common routines for all of Debbugs
18 use Debbugs::Common qw(:url :html);
23 This module is a replacement for the general parts of errorlib.pl.
24 subroutines in errorlib.pl will be gradually phased out and replaced
25 with equivalent (or better) functionality here.
33 use vars qw($VERSION $DEBUG %EXPORT_TAGS @EXPORT_OK @EXPORT);
34 use base qw(Exporter);
38 $DEBUG = 0 unless defined $DEBUG;
41 %EXPORT_TAGS = (util => [qw(getbugcomponent getbuglocation getlocationpath get_hashname),
42 qw(appendfile buglog getparsedaddrs getmaintainers),
43 qw(getmaintainers_reverse),
46 misc => [qw(make_list globify_scalar)],
47 date => [qw(secs_to_english)],
49 lock => [qw(filelock unfilelock @cleanups lockpid)],
52 Exporter::export_ok_tags(qw(lock quit date util misc));
53 $EXPORT_TAGS{all} = [@EXPORT_OK];
56 #use Debbugs::Config qw(:globals);
57 use Debbugs::Config qw(:config);
60 use Debbugs::MIME qw(decode_rfc1522);
66 our $DEBUG_FH = \*STDERR if not defined $DEBUG_FH;
70 The following functions are exported by the C<:util> tag
72 =head2 getbugcomponent
74 my $file = getbugcomponent($bug_number,$extension,$location)
76 Returns the path to the bug file in location C<$location>, bug number
77 C<$bugnumber> and extension C<$extension>
82 my ($bugnum, $ext, $location) = @_;
84 if (not defined $location) {
85 $location = getbuglocation($bugnum, $ext);
86 # Default to non-archived bugs only for now; CGI scripts want
87 # archived bugs but most of the backend scripts don't. For now,
88 # anything that is prepared to accept archived bugs should call
89 # getbuglocation() directly first.
90 return undef if defined $location and
91 ($location ne 'db' and $location ne 'db-h');
93 my $dir = getlocationpath($location);
94 return undef if not defined $dir;
95 if (defined $location and $location eq 'db') {
96 return "$dir/$bugnum.$ext";
98 my $hash = get_hashname($bugnum);
99 return "$dir/$hash/$bugnum.$ext";
103 =head2 getbuglocation
105 getbuglocation($bug_number,$extension)
107 Returns the the location in which a particular bug exists; valid
108 locations returned currently are archive, db-h, or db. If the bug does
109 not exist, returns undef.
114 my ($bugnum, $ext) = @_;
115 my $archdir = get_hashname($bugnum);
116 return 'archive' if -r getlocationpath('archive')."/$archdir/$bugnum.$ext";
117 return 'db-h' if -r getlocationpath('db-h')."/$archdir/$bugnum.$ext";
118 return 'db' if -r getlocationpath('db')."/$bugnum.$ext";
123 =head2 getlocationpath
125 getlocationpath($location)
127 Returns the path to a specific location
131 sub getlocationpath {
133 if (defined $location and $location eq 'archive') {
134 return "$config{spool_dir}/archive";
135 } elsif (defined $location and $location eq 'db') {
136 return "$config{spool_dir}/db";
138 return "$config{spool_dir}/db-h";
147 Returns the hash of the bug which is the location within the archive
152 return "" if ( $_[ 0 ] < 0 );
153 return sprintf "%02d", $_[ 0 ] % 100;
160 Returns the path to the logfile corresponding to the bug.
166 my $location = getbuglocation($bugnum, 'log');
167 return getbugcomponent($bugnum, 'log', $location) if ($location);
168 $location = getbuglocation($bugnum, 'log.gz');
169 return getbugcomponent($bugnum, 'log.gz', $location);
175 appendfile($file,'data','to','append');
177 Opens a file for appending and writes data to it.
183 if (!open(AP,">>$file")) {
184 print $DEBUG_FH "failed open log<\n" if $DEBUG;
185 print $DEBUG_FH "failed open log err $!<\n" if $DEBUG;
186 &quit("opening $file (appendfile): $!");
188 print(AP @_) || &quit("writing $file (appendfile): $!");
189 close(AP) || &quit("closing $file (appendfile): $!");
192 =head2 getparsedaddrs
194 my $address = getparsedaddrs($address);
195 my @address = getparsedaddrs($address);
197 Returns the output from Mail::Address->parse, or the cached output if
198 this address has been parsed before. In SCALAR context returns the
199 first address parsed.
207 return () unless defined $addr;
208 return wantarray?@{$_parsedaddrs{$addr}}:$_parsedaddrs{$addr}[0]
209 if exists $_parsedaddrs{$addr};
211 # don't display the warnings from Mail::Address->parse
212 local $SIG{__WARN__} = sub { };
213 @{$_parsedaddrs{$addr}} = Mail::Address->parse($addr);
215 return wantarray?@{$_parsedaddrs{$addr}}:$_parsedaddrs{$addr}[0];
219 our $_maintainer_rev;
221 return $_maintainer if $_maintainer;
224 for my $file (@config{qw(maintainer_file maintainer_file_override pseduo_maint_file)}) {
225 next unless defined $file;
226 my $maintfile = new IO::File $file,'r' or
227 &quitcgi("Unable to open $file: $!");
228 while(<$maintfile>) {
229 next unless m/^(\S+)\s+(\S.*\S)\s*$/;
233 for my $maint (map {lc($_->address)} getparsedaddrs($b)) {
234 push @{$maintainer_rev{$maint}},$a;
239 $_maintainer = \%maintainer;
240 $_maintainer_rev = \%maintainer_rev;
243 sub getmaintainers_reverse{
244 return $_maintainer_rev if $_maintainer_rev;
246 return $_maintainer_rev;
251 my $pseudopkgdesc = getpseudodesc(...);
253 Returns the entry for a pseudo package from the
254 $config{pseudo_desc_file}. In cases where pseudo_desc_file is not
255 defined, returns an empty arrayref.
257 This function can be used to see if a particular package is a
258 pseudopackage or not.
264 return $_pseudodesc if $_pseudodesc;
267 if (not defined $config{pseudo_desc_file}) {
271 my $pseudo = IO::File->new($config{pseudo_desc_file},'r')
272 or die "Unable to open $config{pseudo_desc_file}: $!";
274 next unless m/^(\S+)\s+(\S.*\S)\s*$/;
275 $pseudodesc{lc $1} = $2;
278 $_pseudodesc = \%pseudodesc;
285 my $english = secs_to_english($seconds);
286 my ($days,$english) = secs_to_english($seconds);
288 XXX This should probably be changed to use Date::Calc
295 my $days = int($seconds / 86400);
296 my $years = int($days / 365);
300 push @age, "1 year" if ($years == 1);
301 push @age, "$years years" if ($years > 1);
302 push @age, "1 day" if ($days == 1);
303 push @age, "$days days" if ($days > 1);
304 $result .= join(" and ", @age);
306 return wantarray?(int($seconds/86400),$result):$result;
312 These functions are exported with the :lock tag
318 FLOCKs the passed file. Use unfilelock to unlock it.
326 # NB - NOT COMPATIBLE WITH `with-lock'
328 if ($lockfile !~ m{^/}) {
329 $lockfile = cwd().'/'.$lockfile;
332 $count= 10; $errors= '';
335 my $fh2 = IO::File->new($lockfile,'w')
336 or die "Unable to open $lockfile for writing: $!";
337 flock($fh2,LOCK_EX|LOCK_NB)
338 or die "Unable to lock $lockfile $!";
345 push @filelocks, {fh => $fh, file => $lockfile};
350 &quit("failed to get lock on $lockfile -- $errors");
354 push(@cleanups,\&unfilelock);
362 Unlocks the file most recently locked.
364 Note that it is not currently possible to unlock a specific file
365 locked with filelock.
370 if (@filelocks == 0) {
371 warn "unfilelock called with no active filelocks!\n";
374 my %fl = %{pop(@filelocks)};
376 flock($fl{fh},LOCK_UN)
377 or warn "Unable to unlock lockfile $fl{file}: $!";
379 or warn "Unable to close lockfile $fl{file}: $!";
381 or warn "Unable to unlink lockfile $fl{file}: $!";
386 lockpid('/path/to/pidfile');
388 Creates a pidfile '/path/to/pidfile' if one doesn't exist or if the
389 pid in the file does not respond to kill 0.
391 Returns 1 on success, false on failure; dies on unusual errors.
398 my $pidfh = IO::File->new($pidfile, 'r') or
399 die "Unable to open pidfile $pidfile: $!";
402 ($pid) = $pid =~ /(\d+)/;
403 if (defined $pid and kill(0,$pid)) {
408 die "Unable to unlink stale pidfile $pidfile $!";
410 my $pidfh = IO::File->new($pidfile,'w') or
411 die "Unable to open $pidfile for writing: $!";
412 print {$pidfh} $$ or die "Unable to write to $pidfile $!";
413 close $pidfh or die "Unable to close $pidfile $!";
420 These functions are exported with the :quit tag.
426 Exits the program by calling die after running some cleanups.
428 This should be replaced with an END handler which runs the cleanups
429 instead. (Or possibly a die handler, if the cleanups are important)
434 print {$DEBUG_FH} "quitting >$_[0]<\n" if $DEBUG;
436 while ($u= $cleanups[$#cleanups]) { &$u; }
442 These functions are exported with the :misc tag
446 LIST = make_list(@_);
448 Turns a scalar or an arrayref into a list; expands a list of arrayrefs
451 That is, make_list([qw(a b c)]); returns qw(a b c); make_list([qw(a
452 b)],[qw(c d)] returns qw(a b c d);
457 return map {(ref($_) eq 'ARRAY')?@{$_}:$_} @_;
461 =head2 globify_scalar
463 my $handle = globify_scalar(\$foo);
465 if $foo isn't already a glob or a globref, turn it into one using
466 IO::Scalar. Gives a new handle to /dev/null if $foo isn't defined.
468 Will carp if given a scalar which isn't a scalarref or a glob (or
469 globref), and return /dev/null. May return undef if IO::Scalar or
470 IO::File fails. (Check $!)
477 if (defined $scalar) {
478 if (defined ref($scalar)) {
479 if (ref($scalar) eq 'SCALAR' and
480 not UNIVERSAL::isa($scalar,'GLOB')) {
481 return IO::Scalar->new($scalar);
487 elsif (UNIVERSAL::isa(\$scalar,'GLOB')) {
491 carp "Given a non-scalar reference, non-glob to globify_scalar; returning /dev/null handle";
494 return IO::File->new('/dev/null','w');