send-email: align RFC 2047 decoding more closely with the spec
[git] / git-send-email.perl
1 #!/usr/bin/perl
2 #
3 # Copyright 2002,2005 Greg Kroah-Hartman <greg@kroah.com>
4 # Copyright 2005 Ryan Anderson <ryan@michonline.com>
5 #
6 # GPL v2 (See COPYING)
7 #
8 # Ported to support git "mbox" format files by Ryan Anderson <ryan@michonline.com>
9 #
10 # Sends a collection of emails to the given email addresses, disturbingly fast.
11 #
12 # Supports two formats:
13 # 1. mbox format files (ignoring most headers and MIME formatting - this is designed for sending patches)
14 # 2. The original format support by Greg's script:
15 #    first line of the message is who to CC,
16 #    and second line is the subject of the message.
17 #
18
19 use 5.008;
20 use strict;
21 use warnings;
22 use Term::ReadLine;
23 use Getopt::Long;
24 use Text::ParseWords;
25 use Data::Dumper;
26 use Term::ANSIColor;
27 use File::Temp qw/ tempdir tempfile /;
28 use File::Spec::Functions qw(catfile);
29 use Error qw(:try);
30 use Git;
31
32 Getopt::Long::Configure qw/ pass_through /;
33
34 package FakeTerm;
35 sub new {
36         my ($class, $reason) = @_;
37         return bless \$reason, shift;
38 }
39 sub readline {
40         my $self = shift;
41         die "Cannot use readline on FakeTerm: $$self";
42 }
43 package main;
44
45
46 sub usage {
47         print <<EOT;
48 git send-email [options] <file | directory | rev-list options >
49
50   Composing:
51     --from                  <str>  * Email From:
52     --[no-]to               <str>  * Email To:
53     --[no-]cc               <str>  * Email Cc:
54     --[no-]bcc              <str>  * Email Bcc:
55     --subject               <str>  * Email "Subject:"
56     --in-reply-to           <str>  * Email "In-Reply-To:"
57     --[no-]annotate                * Review each patch that will be sent in an editor.
58     --compose                      * Open an editor for introduction.
59     --compose-encoding      <str>  * Encoding to assume for introduction.
60     --8bit-encoding         <str>  * Encoding to assume 8bit mails if undeclared
61
62   Sending:
63     --envelope-sender       <str>  * Email envelope sender.
64     --smtp-server       <str:int>  * Outgoing SMTP server to use. The port
65                                      is optional. Default 'localhost'.
66     --smtp-server-option    <str>  * Outgoing SMTP server option to use.
67     --smtp-server-port      <int>  * Outgoing SMTP server port.
68     --smtp-user             <str>  * Username for SMTP-AUTH.
69     --smtp-pass             <str>  * Password for SMTP-AUTH; not necessary.
70     --smtp-encryption       <str>  * tls or ssl; anything else disables.
71     --smtp-ssl                     * Deprecated. Use '--smtp-encryption ssl'.
72     --smtp-ssl-cert-path    <str>  * Path to ca-certificates (either directory or file).
73                                      Pass an empty string to disable certificate
74                                      verification.
75     --smtp-domain           <str>  * The domain name sent to HELO/EHLO handshake
76     --smtp-debug            <0|1>  * Disable, enable Net::SMTP debug.
77
78   Automating:
79     --identity              <str>  * Use the sendemail.<id> options.
80     --to-cmd                <str>  * Email To: via `<str> \$patch_path`
81     --cc-cmd                <str>  * Email Cc: via `<str> \$patch_path`
82     --suppress-cc           <str>  * author, self, sob, cc, cccmd, body, bodycc, all.
83     --[no-]signed-off-by-cc        * Send to Signed-off-by: addresses. Default on.
84     --[no-]suppress-from           * Send to self. Default off.
85     --[no-]chain-reply-to          * Chain In-Reply-To: fields. Default off.
86     --[no-]thread                  * Use In-Reply-To: field. Default on.
87
88   Administering:
89     --confirm               <str>  * Confirm recipients before sending;
90                                      auto, cc, compose, always, or never.
91     --quiet                        * Output one line of info per email.
92     --dry-run                      * Don't actually send the emails.
93     --[no-]validate                * Perform patch sanity checks. Default on.
94     --[no-]format-patch            * understand any non optional arguments as
95                                      `git format-patch` ones.
96     --force                        * Send even if safety checks would prevent it.
97
98 EOT
99         exit(1);
100 }
101
102 # most mail servers generate the Date: header, but not all...
103 sub format_2822_time {
104         my ($time) = @_;
105         my @localtm = localtime($time);
106         my @gmttm = gmtime($time);
107         my $localmin = $localtm[1] + $localtm[2] * 60;
108         my $gmtmin = $gmttm[1] + $gmttm[2] * 60;
109         if ($localtm[0] != $gmttm[0]) {
110                 die "local zone differs from GMT by a non-minute interval\n";
111         }
112         if ((($gmttm[6] + 1) % 7) == $localtm[6]) {
113                 $localmin += 1440;
114         } elsif ((($gmttm[6] - 1) % 7) == $localtm[6]) {
115                 $localmin -= 1440;
116         } elsif ($gmttm[6] != $localtm[6]) {
117                 die "local time offset greater than or equal to 24 hours\n";
118         }
119         my $offset = $localmin - $gmtmin;
120         my $offhour = $offset / 60;
121         my $offmin = abs($offset % 60);
122         if (abs($offhour) >= 24) {
123                 die ("local time offset greater than or equal to 24 hours\n");
124         }
125
126         return sprintf("%s, %2d %s %d %02d:%02d:%02d %s%02d%02d",
127                        qw(Sun Mon Tue Wed Thu Fri Sat)[$localtm[6]],
128                        $localtm[3],
129                        qw(Jan Feb Mar Apr May Jun
130                           Jul Aug Sep Oct Nov Dec)[$localtm[4]],
131                        $localtm[5]+1900,
132                        $localtm[2],
133                        $localtm[1],
134                        $localtm[0],
135                        ($offset >= 0) ? '+' : '-',
136                        abs($offhour),
137                        $offmin,
138                        );
139 }
140
141 my $have_email_valid = eval { require Email::Valid; 1 };
142 my $have_mail_address = eval { require Mail::Address; 1 };
143 my $smtp;
144 my $auth;
145
146 # Regexes for RFC 2047 productions.
147 my $re_token = qr/[^][()<>@,;:\\"\/?.= \000-\037\177-\377]+/;
148 my $re_encoded_text = qr/[^? \000-\037\177-\377]+/;
149 my $re_encoded_word = qr/=\?($re_token)\?($re_token)\?($re_encoded_text)\?=/;
150
151 # Variables we fill in automatically, or via prompting:
152 my (@to,$no_to,@initial_to,@cc,$no_cc,@initial_cc,@bcclist,$no_bcc,@xh,
153         $initial_reply_to,$initial_subject,@files,
154         $author,$sender,$smtp_authpass,$annotate,$compose,$time);
155
156 my $envelope_sender;
157
158 # Example reply to:
159 #$initial_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
160
161 my $repo = eval { Git->repository() };
162 my @repo = $repo ? ($repo) : ();
163 my $term = eval {
164         $ENV{"GIT_SEND_EMAIL_NOTTY"}
165                 ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
166                 : new Term::ReadLine 'git-send-email';
167 };
168 if ($@) {
169         $term = new FakeTerm "$@: going non-interactive";
170 }
171
172 # Behavior modification variables
173 my ($quiet, $dry_run) = (0, 0);
174 my $format_patch;
175 my $compose_filename;
176 my $force = 0;
177
178 # Handle interactive edition of files.
179 my $multiedit;
180 my $editor;
181
182 sub do_edit {
183         if (!defined($editor)) {
184                 $editor = Git::command_oneline('var', 'GIT_EDITOR');
185         }
186         if (defined($multiedit) && !$multiedit) {
187                 map {
188                         system('sh', '-c', $editor.' "$@"', $editor, $_);
189                         if (($? & 127) || ($? >> 8)) {
190                                 die("the editor exited uncleanly, aborting everything");
191                         }
192                 } @_;
193         } else {
194                 system('sh', '-c', $editor.' "$@"', $editor, @_);
195                 if (($? & 127) || ($? >> 8)) {
196                         die("the editor exited uncleanly, aborting everything");
197                 }
198         }
199 }
200
201 # Variables with corresponding config settings
202 my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc);
203 my ($to_cmd, $cc_cmd);
204 my ($smtp_server, $smtp_server_port, @smtp_server_options);
205 my ($smtp_authuser, $smtp_encryption, $smtp_ssl_cert_path);
206 my ($identity, $aliasfiletype, @alias_files, $smtp_domain);
207 my ($validate, $confirm);
208 my (@suppress_cc);
209 my ($auto_8bit_encoding);
210 my ($compose_encoding);
211
212 my ($debug_net_smtp) = 0;               # Net::SMTP, see send_message()
213
214 my %config_bool_settings = (
215     "thread" => [\$thread, 1],
216     "chainreplyto" => [\$chain_reply_to, 0],
217     "suppressfrom" => [\$suppress_from, undef],
218     "signedoffbycc" => [\$signed_off_by_cc, undef],
219     "signedoffcc" => [\$signed_off_by_cc, undef],      # Deprecated
220     "validate" => [\$validate, 1],
221     "multiedit" => [\$multiedit, undef],
222     "annotate" => [\$annotate, undef]
223 );
224
225 my %config_settings = (
226     "smtpserver" => \$smtp_server,
227     "smtpserverport" => \$smtp_server_port,
228     "smtpserveroption" => \@smtp_server_options,
229     "smtpuser" => \$smtp_authuser,
230     "smtppass" => \$smtp_authpass,
231     "smtpsslcertpath" => \$smtp_ssl_cert_path,
232     "smtpdomain" => \$smtp_domain,
233     "to" => \@initial_to,
234     "tocmd" => \$to_cmd,
235     "cc" => \@initial_cc,
236     "cccmd" => \$cc_cmd,
237     "aliasfiletype" => \$aliasfiletype,
238     "bcc" => \@bcclist,
239     "suppresscc" => \@suppress_cc,
240     "envelopesender" => \$envelope_sender,
241     "confirm"   => \$confirm,
242     "from" => \$sender,
243     "assume8bitencoding" => \$auto_8bit_encoding,
244     "composeencoding" => \$compose_encoding,
245 );
246
247 my %config_path_settings = (
248     "aliasesfile" => \@alias_files,
249 );
250
251 # Handle Uncouth Termination
252 sub signal_handler {
253
254         # Make text normal
255         print color("reset"), "\n";
256
257         # SMTP password masked
258         system "stty echo";
259
260         # tmp files from --compose
261         if (defined $compose_filename) {
262                 if (-e $compose_filename) {
263                         print "'$compose_filename' contains an intermediate version of the email you were composing.\n";
264                 }
265                 if (-e ($compose_filename . ".final")) {
266                         print "'$compose_filename.final' contains the composed email.\n"
267                 }
268         }
269
270         exit;
271 };
272
273 $SIG{TERM} = \&signal_handler;
274 $SIG{INT}  = \&signal_handler;
275
276 # Begin by accumulating all the variables (defined above), that we will end up
277 # needing, first, from the command line:
278
279 my $help;
280 my $rc = GetOptions("h" => \$help,
281                     "sender|from=s" => \$sender,
282                     "in-reply-to=s" => \$initial_reply_to,
283                     "subject=s" => \$initial_subject,
284                     "to=s" => \@initial_to,
285                     "to-cmd=s" => \$to_cmd,
286                     "no-to" => \$no_to,
287                     "cc=s" => \@initial_cc,
288                     "no-cc" => \$no_cc,
289                     "bcc=s" => \@bcclist,
290                     "no-bcc" => \$no_bcc,
291                     "chain-reply-to!" => \$chain_reply_to,
292                     "smtp-server=s" => \$smtp_server,
293                     "smtp-server-option=s" => \@smtp_server_options,
294                     "smtp-server-port=s" => \$smtp_server_port,
295                     "smtp-user=s" => \$smtp_authuser,
296                     "smtp-pass:s" => \$smtp_authpass,
297                     "smtp-ssl" => sub { $smtp_encryption = 'ssl' },
298                     "smtp-encryption=s" => \$smtp_encryption,
299                     "smtp-ssl-cert-path=s" => \$smtp_ssl_cert_path,
300                     "smtp-debug:i" => \$debug_net_smtp,
301                     "smtp-domain:s" => \$smtp_domain,
302                     "identity=s" => \$identity,
303                     "annotate!" => \$annotate,
304                     "compose" => \$compose,
305                     "quiet" => \$quiet,
306                     "cc-cmd=s" => \$cc_cmd,
307                     "suppress-from!" => \$suppress_from,
308                     "suppress-cc=s" => \@suppress_cc,
309                     "signed-off-cc|signed-off-by-cc!" => \$signed_off_by_cc,
310                     "confirm=s" => \$confirm,
311                     "dry-run" => \$dry_run,
312                     "envelope-sender=s" => \$envelope_sender,
313                     "thread!" => \$thread,
314                     "validate!" => \$validate,
315                     "format-patch!" => \$format_patch,
316                     "8bit-encoding=s" => \$auto_8bit_encoding,
317                     "compose-encoding=s" => \$compose_encoding,
318                     "force" => \$force,
319          );
320
321 usage() if $help;
322 unless ($rc) {
323     usage();
324 }
325
326 die "Cannot run git format-patch from outside a repository\n"
327         if $format_patch and not $repo;
328
329 # Now, let's fill any that aren't set in with defaults:
330
331 sub read_config {
332         my ($prefix) = @_;
333
334         foreach my $setting (keys %config_bool_settings) {
335                 my $target = $config_bool_settings{$setting}->[0];
336                 $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
337         }
338
339         foreach my $setting (keys %config_path_settings) {
340                 my $target = $config_path_settings{$setting};
341                 if (ref($target) eq "ARRAY") {
342                         unless (@$target) {
343                                 my @values = Git::config_path(@repo, "$prefix.$setting");
344                                 @$target = @values if (@values && defined $values[0]);
345                         }
346                 }
347                 else {
348                         $$target = Git::config_path(@repo, "$prefix.$setting") unless (defined $$target);
349                 }
350         }
351
352         foreach my $setting (keys %config_settings) {
353                 my $target = $config_settings{$setting};
354                 next if $setting eq "to" and defined $no_to;
355                 next if $setting eq "cc" and defined $no_cc;
356                 next if $setting eq "bcc" and defined $no_bcc;
357                 if (ref($target) eq "ARRAY") {
358                         unless (@$target) {
359                                 my @values = Git::config(@repo, "$prefix.$setting");
360                                 @$target = @values if (@values && defined $values[0]);
361                         }
362                 }
363                 else {
364                         $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
365                 }
366         }
367
368         if (!defined $smtp_encryption) {
369                 my $enc = Git::config(@repo, "$prefix.smtpencryption");
370                 if (defined $enc) {
371                         $smtp_encryption = $enc;
372                 } elsif (Git::config_bool(@repo, "$prefix.smtpssl")) {
373                         $smtp_encryption = 'ssl';
374                 }
375         }
376 }
377
378 # read configuration from [sendemail "$identity"], fall back on [sendemail]
379 $identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
380 read_config("sendemail.$identity") if (defined $identity);
381 read_config("sendemail");
382
383 # fall back on builtin bool defaults
384 foreach my $setting (values %config_bool_settings) {
385         ${$setting->[0]} = $setting->[1] unless (defined (${$setting->[0]}));
386 }
387
388 # 'default' encryption is none -- this only prevents a warning
389 $smtp_encryption = '' unless (defined $smtp_encryption);
390
391 # Set CC suppressions
392 my(%suppress_cc);
393 if (@suppress_cc) {
394         foreach my $entry (@suppress_cc) {
395                 die "Unknown --suppress-cc field: '$entry'\n"
396                         unless $entry =~ /^(?:all|cccmd|cc|author|self|sob|body|bodycc)$/;
397                 $suppress_cc{$entry} = 1;
398         }
399 }
400
401 if ($suppress_cc{'all'}) {
402         foreach my $entry (qw (cccmd cc author self sob body bodycc)) {
403                 $suppress_cc{$entry} = 1;
404         }
405         delete $suppress_cc{'all'};
406 }
407
408 # If explicit old-style ones are specified, they trump --suppress-cc.
409 $suppress_cc{'self'} = $suppress_from if defined $suppress_from;
410 $suppress_cc{'sob'} = !$signed_off_by_cc if defined $signed_off_by_cc;
411
412 if ($suppress_cc{'body'}) {
413         foreach my $entry (qw (sob bodycc)) {
414                 $suppress_cc{$entry} = 1;
415         }
416         delete $suppress_cc{'body'};
417 }
418
419 # Set confirm's default value
420 my $confirm_unconfigured = !defined $confirm;
421 if ($confirm_unconfigured) {
422         $confirm = scalar %suppress_cc ? 'compose' : 'auto';
423 };
424 die "Unknown --confirm setting: '$confirm'\n"
425         unless $confirm =~ /^(?:auto|cc|compose|always|never)/;
426
427 # Debugging, print out the suppressions.
428 if (0) {
429         print "suppressions:\n";
430         foreach my $entry (keys %suppress_cc) {
431                 printf "  %-5s -> $suppress_cc{$entry}\n", $entry;
432         }
433 }
434
435 my ($repoauthor, $repocommitter);
436 ($repoauthor) = Git::ident_person(@repo, 'author');
437 ($repocommitter) = Git::ident_person(@repo, 'committer');
438
439 # Verify the user input
440
441 foreach my $entry (@initial_to) {
442         die "Comma in --to entry: $entry'\n" unless $entry !~ m/,/;
443 }
444
445 foreach my $entry (@initial_cc) {
446         die "Comma in --cc entry: $entry'\n" unless $entry !~ m/,/;
447 }
448
449 foreach my $entry (@bcclist) {
450         die "Comma in --bcclist entry: $entry'\n" unless $entry !~ m/,/;
451 }
452
453 sub parse_address_line {
454         if ($have_mail_address) {
455                 return map { $_->format } Mail::Address->parse($_[0]);
456         } else {
457                 return split_addrs($_[0]);
458         }
459 }
460
461 sub split_addrs {
462         return quotewords('\s*,\s*', 1, @_);
463 }
464
465 my %aliases;
466 my %parse_alias = (
467         # multiline formats can be supported in the future
468         mutt => sub { my $fh = shift; while (<$fh>) {
469                 if (/^\s*alias\s+(?:-group\s+\S+\s+)*(\S+)\s+(.*)$/) {
470                         my ($alias, $addr) = ($1, $2);
471                         $addr =~ s/#.*$//; # mutt allows # comments
472                          # commas delimit multiple addresses
473                         $aliases{$alias} = [ split_addrs($addr) ];
474                 }}},
475         mailrc => sub { my $fh = shift; while (<$fh>) {
476                 if (/^alias\s+(\S+)\s+(.*)$/) {
477                         # spaces delimit multiple addresses
478                         $aliases{$1} = [ quotewords('\s+', 0, $2) ];
479                 }}},
480         pine => sub { my $fh = shift; my $f='\t[^\t]*';
481                 for (my $x = ''; defined($x); $x = $_) {
482                         chomp $x;
483                         $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
484                         $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
485                         $aliases{$1} = [ split_addrs($2) ];
486                 }},
487         elm => sub  { my $fh = shift;
488                       while (<$fh>) {
489                           if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
490                               my ($alias, $addr) = ($1, $2);
491                                $aliases{$alias} = [ split_addrs($addr) ];
492                           }
493                       } },
494
495         gnus => sub { my $fh = shift; while (<$fh>) {
496                 if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
497                         $aliases{$1} = [ $2 ];
498                 }}}
499 );
500
501 if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
502         foreach my $file (@alias_files) {
503                 open my $fh, '<', $file or die "opening $file: $!\n";
504                 $parse_alias{$aliasfiletype}->($fh);
505                 close $fh;
506         }
507 }
508
509 ($sender) = expand_aliases($sender) if defined $sender;
510
511 # is_format_patch_arg($f) returns 0 if $f names a patch, or 1 if
512 # $f is a revision list specification to be passed to format-patch.
513 sub is_format_patch_arg {
514         return unless $repo;
515         my $f = shift;
516         try {
517                 $repo->command('rev-parse', '--verify', '--quiet', $f);
518                 if (defined($format_patch)) {
519                         return $format_patch;
520                 }
521                 die(<<EOF);
522 File '$f' exists but it could also be the range of commits
523 to produce patches for.  Please disambiguate by...
524
525     * Saying "./$f" if you mean a file; or
526     * Giving --format-patch option if you mean a range.
527 EOF
528         } catch Git::Error::Command with {
529                 # Not a valid revision.  Treat it as a filename.
530                 return 0;
531         }
532 }
533
534 # Now that all the defaults are set, process the rest of the command line
535 # arguments and collect up the files that need to be processed.
536 my @rev_list_opts;
537 while (defined(my $f = shift @ARGV)) {
538         if ($f eq "--") {
539                 push @rev_list_opts, "--", @ARGV;
540                 @ARGV = ();
541         } elsif (-d $f and !is_format_patch_arg($f)) {
542                 opendir my $dh, $f
543                         or die "Failed to opendir $f: $!";
544
545                 push @files, grep { -f $_ } map { catfile($f, $_) }
546                                 sort readdir $dh;
547                 closedir $dh;
548         } elsif ((-f $f or -p $f) and !is_format_patch_arg($f)) {
549                 push @files, $f;
550         } else {
551                 push @rev_list_opts, $f;
552         }
553 }
554
555 if (@rev_list_opts) {
556         die "Cannot run git format-patch from outside a repository\n"
557                 unless $repo;
558         push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
559 }
560
561 if ($validate) {
562         foreach my $f (@files) {
563                 unless (-p $f) {
564                         my $error = validate_patch($f);
565                         $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
566                 }
567         }
568 }
569
570 if (@files) {
571         unless ($quiet) {
572                 print $_,"\n" for (@files);
573         }
574 } else {
575         print STDERR "\nNo patch files specified!\n\n";
576         usage();
577 }
578
579 sub get_patch_subject {
580         my $fn = shift;
581         open (my $fh, '<', $fn);
582         while (my $line = <$fh>) {
583                 next unless ($line =~ /^Subject: (.*)$/);
584                 close $fh;
585                 return "GIT: $1\n";
586         }
587         close $fh;
588         die "No subject line in $fn ?";
589 }
590
591 if ($compose) {
592         # Note that this does not need to be secure, but we will make a small
593         # effort to have it be unique
594         $compose_filename = ($repo ?
595                 tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
596                 tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
597         open my $c, ">", $compose_filename
598                 or die "Failed to open for writing $compose_filename: $!";
599
600
601         my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
602         my $tpl_subject = $initial_subject || '';
603         my $tpl_reply_to = $initial_reply_to || '';
604
605         print $c <<EOT;
606 From $tpl_sender # This line is ignored.
607 GIT: Lines beginning in "GIT:" will be removed.
608 GIT: Consider including an overall diffstat or table of contents
609 GIT: for the patch you are writing.
610 GIT:
611 GIT: Clear the body content if you don't wish to send a summary.
612 From: $tpl_sender
613 Subject: $tpl_subject
614 In-Reply-To: $tpl_reply_to
615
616 EOT
617         for my $f (@files) {
618                 print $c get_patch_subject($f);
619         }
620         close $c;
621
622         if ($annotate) {
623                 do_edit($compose_filename, @files);
624         } else {
625                 do_edit($compose_filename);
626         }
627
628         open my $c2, ">", $compose_filename . ".final"
629                 or die "Failed to open $compose_filename.final : " . $!;
630
631         open $c, "<", $compose_filename
632                 or die "Failed to open $compose_filename : " . $!;
633
634         my $need_8bit_cte = file_has_nonascii($compose_filename);
635         my $in_body = 0;
636         my $summary_empty = 1;
637         if (!defined $compose_encoding) {
638                 $compose_encoding = "UTF-8";
639         }
640         while(<$c>) {
641                 next if m/^GIT:/;
642                 if ($in_body) {
643                         $summary_empty = 0 unless (/^\n$/);
644                 } elsif (/^\n$/) {
645                         $in_body = 1;
646                         if ($need_8bit_cte) {
647                                 print $c2 "MIME-Version: 1.0\n",
648                                          "Content-Type: text/plain; ",
649                                            "charset=$compose_encoding\n",
650                                          "Content-Transfer-Encoding: 8bit\n";
651                         }
652                 } elsif (/^MIME-Version:/i) {
653                         $need_8bit_cte = 0;
654                 } elsif (/^Subject:\s*(.+)\s*$/i) {
655                         $initial_subject = $1;
656                         my $subject = $initial_subject;
657                         $_ = "Subject: " .
658                                 quote_subject($subject, $compose_encoding) .
659                                 "\n";
660                 } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
661                         $initial_reply_to = $1;
662                         next;
663                 } elsif (/^From:\s*(.+)\s*$/i) {
664                         $sender = $1;
665                         next;
666                 } elsif (/^(?:To|Cc|Bcc):/i) {
667                         print "To/Cc/Bcc fields are not interpreted yet, they have been ignored\n";
668                         next;
669                 }
670                 print $c2 $_;
671         }
672         close $c;
673         close $c2;
674
675         if ($summary_empty) {
676                 print "Summary email is empty, skipping it\n";
677                 $compose = -1;
678         }
679 } elsif ($annotate) {
680         do_edit(@files);
681 }
682
683 sub ask {
684         my ($prompt, %arg) = @_;
685         my $valid_re = $arg{valid_re};
686         my $default = $arg{default};
687         my $confirm_only = $arg{confirm_only};
688         my $resp;
689         my $i = 0;
690         return defined $default ? $default : undef
691                 unless defined $term->IN and defined fileno($term->IN) and
692                        defined $term->OUT and defined fileno($term->OUT);
693         while ($i++ < 10) {
694                 $resp = $term->readline($prompt);
695                 if (!defined $resp) { # EOF
696                         print "\n";
697                         return defined $default ? $default : undef;
698                 }
699                 if ($resp eq '' and defined $default) {
700                         return $default;
701                 }
702                 if (!defined $valid_re or $resp =~ /$valid_re/) {
703                         return $resp;
704                 }
705                 if ($confirm_only) {
706                         my $yesno = $term->readline("Are you sure you want to use <$resp> [y/N]? ");
707                         if (defined $yesno && $yesno =~ /y/i) {
708                                 return $resp;
709                         }
710                 }
711         }
712         return;
713 }
714
715 my %broken_encoding;
716
717 sub file_declares_8bit_cte {
718         my $fn = shift;
719         open (my $fh, '<', $fn);
720         while (my $line = <$fh>) {
721                 last if ($line =~ /^$/);
722                 return 1 if ($line =~ /^Content-Transfer-Encoding: .*8bit.*$/);
723         }
724         close $fh;
725         return 0;
726 }
727
728 foreach my $f (@files) {
729         next unless (body_or_subject_has_nonascii($f)
730                      && !file_declares_8bit_cte($f));
731         $broken_encoding{$f} = 1;
732 }
733
734 if (!defined $auto_8bit_encoding && scalar %broken_encoding) {
735         print "The following files are 8bit, but do not declare " .
736                 "a Content-Transfer-Encoding.\n";
737         foreach my $f (sort keys %broken_encoding) {
738                 print "    $f\n";
739         }
740         $auto_8bit_encoding = ask("Which 8bit encoding should I declare [UTF-8]? ",
741                                   default => "UTF-8");
742 }
743
744 if (!$force) {
745         for my $f (@files) {
746                 if (get_patch_subject($f) =~ /\Q*** SUBJECT HERE ***\E/) {
747                         die "Refusing to send because the patch\n\t$f\n"
748                                 . "has the template subject '*** SUBJECT HERE ***'. "
749                                 . "Pass --force if you really want to send.\n";
750                 }
751         }
752 }
753
754 if (!defined $sender) {
755         $sender = $repoauthor || $repocommitter || '';
756 }
757
758 # $sender could be an already sanitized address
759 # (e.g. sendemail.from could be manually sanitized by user).
760 # But it's a no-op to run sanitize_address on an already sanitized address.
761 $sender = sanitize_address($sender);
762
763 my $prompting = 0;
764 if (!@initial_to && !defined $to_cmd) {
765         my $to = ask("Who should the emails be sent to (if any)? ",
766                      default => "",
767                      valid_re => qr/\@.*\./, confirm_only => 1);
768         push @initial_to, parse_address_line($to) if defined $to; # sanitized/validated later
769         $prompting++;
770 }
771
772 sub expand_aliases {
773         return map { expand_one_alias($_) } @_;
774 }
775
776 my %EXPANDED_ALIASES;
777 sub expand_one_alias {
778         my $alias = shift;
779         if ($EXPANDED_ALIASES{$alias}) {
780                 die "fatal: alias '$alias' expands to itself\n";
781         }
782         local $EXPANDED_ALIASES{$alias} = 1;
783         return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
784 }
785
786 @initial_to = expand_aliases(@initial_to);
787 @initial_to = validate_address_list(sanitize_address_list(@initial_to));
788 @initial_cc = expand_aliases(@initial_cc);
789 @initial_cc = validate_address_list(sanitize_address_list(@initial_cc));
790 @bcclist = expand_aliases(@bcclist);
791 @bcclist = validate_address_list(sanitize_address_list(@bcclist));
792
793 if ($thread && !defined $initial_reply_to && $prompting) {
794         $initial_reply_to = ask(
795                 "Message-ID to be used as In-Reply-To for the first email (if any)? ",
796                 default => "",
797                 valid_re => qr/\@.*\./, confirm_only => 1);
798 }
799 if (defined $initial_reply_to) {
800         $initial_reply_to =~ s/^\s*<?//;
801         $initial_reply_to =~ s/>?\s*$//;
802         $initial_reply_to = "<$initial_reply_to>" if $initial_reply_to ne '';
803 }
804
805 if (!defined $smtp_server) {
806         foreach (qw( /usr/sbin/sendmail /usr/lib/sendmail )) {
807                 if (-x $_) {
808                         $smtp_server = $_;
809                         last;
810                 }
811         }
812         $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
813 }
814
815 if ($compose && $compose > 0) {
816         @files = ($compose_filename . ".final", @files);
817 }
818
819 # Variables we set as part of the loop over files
820 our ($message_id, %mail, $subject, $reply_to, $references, $message,
821         $needs_confirm, $message_num, $ask_default);
822
823 sub extract_valid_address {
824         my $address = shift;
825         my $local_part_regexp = qr/[^<>"\s@]+/;
826         my $domain_regexp = qr/[^.<>"\s@]+(?:\.[^.<>"\s@]+)+/;
827
828         # check for a local address:
829         return $address if ($address =~ /^($local_part_regexp)$/);
830
831         $address =~ s/^\s*<(.*)>\s*$/$1/;
832         if ($have_email_valid) {
833                 return scalar Email::Valid->address($address);
834         }
835
836         # less robust/correct than the monster regexp in Email::Valid,
837         # but still does a 99% job, and one less dependency
838         return $1 if $address =~ /($local_part_regexp\@$domain_regexp)/;
839         return;
840 }
841
842 sub extract_valid_address_or_die {
843         my $address = shift;
844         $address = extract_valid_address($address);
845         die "error: unable to extract a valid address from: $address\n"
846                 if !$address;
847         return $address;
848 }
849
850 sub validate_address {
851         my $address = shift;
852         while (!extract_valid_address($address)) {
853                 print STDERR "error: unable to extract a valid address from: $address\n";
854                 $_ = ask("What to do with this address? ([q]uit|[d]rop|[e]dit): ",
855                         valid_re => qr/^(?:quit|q|drop|d|edit|e)/i,
856                         default => 'q');
857                 if (/^d/i) {
858                         return undef;
859                 } elsif (/^q/i) {
860                         cleanup_compose_files();
861                         exit(0);
862                 }
863                 $address = ask("Who should the email be sent to (if any)? ",
864                         default => "",
865                         valid_re => qr/\@.*\./, confirm_only => 1);
866         }
867         return $address;
868 }
869
870 sub validate_address_list {
871         return (grep { defined $_ }
872                 map { validate_address($_) } @_);
873 }
874
875 # Usually don't need to change anything below here.
876
877 # we make a "fake" message id by taking the current number
878 # of seconds since the beginning of Unix time and tacking on
879 # a random number to the end, in case we are called quicker than
880 # 1 second since the last time we were called.
881
882 # We'll setup a template for the message id, using the "from" address:
883
884 my ($message_id_stamp, $message_id_serial);
885 sub make_message_id {
886         my $uniq;
887         if (!defined $message_id_stamp) {
888                 $message_id_stamp = sprintf("%s-%s", time, $$);
889                 $message_id_serial = 0;
890         }
891         $message_id_serial++;
892         $uniq = "$message_id_stamp-$message_id_serial";
893
894         my $du_part;
895         for ($sender, $repocommitter, $repoauthor) {
896                 $du_part = extract_valid_address(sanitize_address($_));
897                 last if (defined $du_part and $du_part ne '');
898         }
899         if (not defined $du_part or $du_part eq '') {
900                 require Sys::Hostname;
901                 $du_part = 'user@' . Sys::Hostname::hostname();
902         }
903         my $message_id_template = "<%s-git-send-email-%s>";
904         $message_id = sprintf($message_id_template, $uniq, $du_part);
905         #print "new message id = $message_id\n"; # Was useful for debugging
906 }
907
908
909
910 $time = time - scalar $#files;
911
912 sub unquote_rfc2047 {
913         local ($_) = @_;
914         my $charset;
915         s{$re_encoded_word}{
916                 $charset = $1;
917                 my $encoding = $2;
918                 my $text = $3;
919                 if ($encoding eq 'q' || $encoding eq 'Q') {
920                         $text =~ s/_/ /g;
921                         $text =~ s/=([0-9A-F]{2})/chr(hex($1))/egi;
922                         $text;
923                 } else {
924                         $&; # other encodings not supported yet
925                 }
926         }eg;
927         return wantarray ? ($_, $charset) : $_;
928 }
929
930 sub quote_rfc2047 {
931         local $_ = shift;
932         my $encoding = shift || 'UTF-8';
933         s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
934         s/(.*)/=\?$encoding\?q\?$1\?=/;
935         return $_;
936 }
937
938 sub is_rfc2047_quoted {
939         my $s = shift;
940         length($s) <= 75 &&
941         $s =~ m/^(?:"[[:ascii:]]*"|$re_encoded_word)$/o;
942 }
943
944 sub subject_needs_rfc2047_quoting {
945         my $s = shift;
946
947         return ($s =~ /[^[:ascii:]]/) || ($s =~ /=\?/);
948 }
949
950 sub quote_subject {
951         local $subject = shift;
952         my $encoding = shift || 'UTF-8';
953
954         if (subject_needs_rfc2047_quoting($subject)) {
955                 return quote_rfc2047($subject, $encoding);
956         }
957         return $subject;
958 }
959
960 # use the simplest quoting being able to handle the recipient
961 sub sanitize_address {
962         my ($recipient) = @_;
963
964         # remove garbage after email address
965         $recipient =~ s/(.*>).*$/$1/;
966
967         my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
968
969         if (not $recipient_name) {
970                 return $recipient;
971         }
972
973         # if recipient_name is already quoted, do nothing
974         if (is_rfc2047_quoted($recipient_name)) {
975                 return $recipient;
976         }
977
978         # rfc2047 is needed if a non-ascii char is included
979         if ($recipient_name =~ /[^[:ascii:]]/) {
980                 $recipient_name =~ s/^"(.*)"$/$1/;
981                 $recipient_name = quote_rfc2047($recipient_name);
982         }
983
984         # double quotes are needed if specials or CTLs are included
985         elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
986                 $recipient_name =~ s/(["\\\r])/\\$1/g;
987                 $recipient_name = qq["$recipient_name"];
988         }
989
990         return "$recipient_name $recipient_addr";
991
992 }
993
994 sub sanitize_address_list {
995         return (map { sanitize_address($_) } @_);
996 }
997
998 # Returns the local Fully Qualified Domain Name (FQDN) if available.
999 #
1000 # Tightly configured MTAa require that a caller sends a real DNS
1001 # domain name that corresponds the IP address in the HELO/EHLO
1002 # handshake. This is used to verify the connection and prevent
1003 # spammers from trying to hide their identity. If the DNS and IP don't
1004 # match, the receiveing MTA may deny the connection.
1005 #
1006 # Here is a deny example of Net::SMTP with the default "localhost.localdomain"
1007 #
1008 # Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
1009 # Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
1010 #
1011 # This maildomain*() code is based on ideas in Perl library Test::Reporter
1012 # /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
1013
1014 sub valid_fqdn {
1015         my $domain = shift;
1016         return defined $domain && !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
1017 }
1018
1019 sub maildomain_net {
1020         my $maildomain;
1021
1022         if (eval { require Net::Domain; 1 }) {
1023                 my $domain = Net::Domain::domainname();
1024                 $maildomain = $domain if valid_fqdn($domain);
1025         }
1026
1027         return $maildomain;
1028 }
1029
1030 sub maildomain_mta {
1031         my $maildomain;
1032
1033         if (eval { require Net::SMTP; 1 }) {
1034                 for my $host (qw(mailhost localhost)) {
1035                         my $smtp = Net::SMTP->new($host);
1036                         if (defined $smtp) {
1037                                 my $domain = $smtp->domain;
1038                                 $smtp->quit;
1039
1040                                 $maildomain = $domain if valid_fqdn($domain);
1041
1042                                 last if $maildomain;
1043                         }
1044                 }
1045         }
1046
1047         return $maildomain;
1048 }
1049
1050 sub maildomain {
1051         return maildomain_net() || maildomain_mta() || 'localhost.localdomain';
1052 }
1053
1054 sub smtp_host_string {
1055         if (defined $smtp_server_port) {
1056                 return "$smtp_server:$smtp_server_port";
1057         } else {
1058                 return $smtp_server;
1059         }
1060 }
1061
1062 # Returns 1 if authentication succeeded or was not necessary
1063 # (smtp_user was not specified), and 0 otherwise.
1064
1065 sub smtp_auth_maybe {
1066         if (!defined $smtp_authuser || $auth) {
1067                 return 1;
1068         }
1069
1070         # Workaround AUTH PLAIN/LOGIN interaction defect
1071         # with Authen::SASL::Cyrus
1072         eval {
1073                 require Authen::SASL;
1074                 Authen::SASL->import(qw(Perl));
1075         };
1076
1077         # TODO: Authentication may fail not because credentials were
1078         # invalid but due to other reasons, in which we should not
1079         # reject credentials.
1080         $auth = Git::credential({
1081                 'protocol' => 'smtp',
1082                 'host' => smtp_host_string(),
1083                 'username' => $smtp_authuser,
1084                 # if there's no password, "git credential fill" will
1085                 # give us one, otherwise it'll just pass this one.
1086                 'password' => $smtp_authpass
1087         }, sub {
1088                 my $cred = shift;
1089                 return !!$smtp->auth($cred->{'username'}, $cred->{'password'});
1090         });
1091
1092         return $auth;
1093 }
1094
1095 sub ssl_verify_params {
1096         eval {
1097                 require IO::Socket::SSL;
1098                 IO::Socket::SSL->import(qw/SSL_VERIFY_PEER SSL_VERIFY_NONE/);
1099         };
1100         if ($@) {
1101                 print STDERR "Not using SSL_VERIFY_PEER due to out-of-date IO::Socket::SSL.\n";
1102                 return;
1103         }
1104
1105         if (!defined $smtp_ssl_cert_path) {
1106                 # use the OpenSSL defaults
1107                 return (SSL_verify_mode => SSL_VERIFY_PEER());
1108         }
1109
1110         if ($smtp_ssl_cert_path eq "") {
1111                 return (SSL_verify_mode => SSL_VERIFY_NONE());
1112         } elsif (-d $smtp_ssl_cert_path) {
1113                 return (SSL_verify_mode => SSL_VERIFY_PEER(),
1114                         SSL_ca_path => $smtp_ssl_cert_path);
1115         } elsif (-f $smtp_ssl_cert_path) {
1116                 return (SSL_verify_mode => SSL_VERIFY_PEER(),
1117                         SSL_ca_file => $smtp_ssl_cert_path);
1118         } else {
1119                 print STDERR "Not using SSL_VERIFY_PEER because the CA path does not exist.\n";
1120                 return (SSL_verify_mode => SSL_VERIFY_NONE());
1121         }
1122 }
1123
1124 # Returns 1 if the message was sent, and 0 otherwise.
1125 # In actuality, the whole program dies when there
1126 # is an error sending a message.
1127
1128 sub send_message {
1129         my @recipients = unique_email_list(@to);
1130         @cc = (grep { my $cc = extract_valid_address_or_die($_);
1131                       not grep { $cc eq $_ || $_ =~ /<\Q${cc}\E>$/ } @recipients
1132                     }
1133                @cc);
1134         my $to = join (",\n\t", @recipients);
1135         @recipients = unique_email_list(@recipients,@cc,@bcclist);
1136         @recipients = (map { extract_valid_address_or_die($_) } @recipients);
1137         my $date = format_2822_time($time++);
1138         my $gitversion = '@@GIT_VERSION@@';
1139         if ($gitversion =~ m/..GIT_VERSION../) {
1140             $gitversion = Git::version();
1141         }
1142
1143         my $cc = join(",\n\t", unique_email_list(@cc));
1144         my $ccline = "";
1145         if ($cc ne '') {
1146                 $ccline = "\nCc: $cc";
1147         }
1148         make_message_id() unless defined($message_id);
1149
1150         my $header = "From: $sender
1151 To: $to${ccline}
1152 Subject: $subject
1153 Date: $date
1154 Message-Id: $message_id
1155 X-Mailer: git-send-email $gitversion
1156 ";
1157         if ($reply_to) {
1158
1159                 $header .= "In-Reply-To: $reply_to\n";
1160                 $header .= "References: $references\n";
1161         }
1162         if (@xh) {
1163                 $header .= join("\n", @xh) . "\n";
1164         }
1165
1166         my @sendmail_parameters = ('-i', @recipients);
1167         my $raw_from = $sender;
1168         if (defined $envelope_sender && $envelope_sender ne "auto") {
1169                 $raw_from = $envelope_sender;
1170         }
1171         $raw_from = extract_valid_address($raw_from);
1172         unshift (@sendmail_parameters,
1173                         '-f', $raw_from) if(defined $envelope_sender);
1174
1175         if ($needs_confirm && !$dry_run) {
1176                 print "\n$header\n";
1177                 if ($needs_confirm eq "inform") {
1178                         $confirm_unconfigured = 0; # squelch this message for the rest of this run
1179                         $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
1180                         print "    The Cc list above has been expanded by additional\n";
1181                         print "    addresses found in the patch commit message. By default\n";
1182                         print "    send-email prompts before sending whenever this occurs.\n";
1183                         print "    This behavior is controlled by the sendemail.confirm\n";
1184                         print "    configuration setting.\n";
1185                         print "\n";
1186                         print "    For additional information, run 'git send-email --help'.\n";
1187                         print "    To retain the current behavior, but squelch this message,\n";
1188                         print "    run 'git config --global sendemail.confirm auto'.\n\n";
1189                 }
1190                 $_ = ask("Send this email? ([y]es|[n]o|[q]uit|[a]ll): ",
1191                          valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
1192                          default => $ask_default);
1193                 die "Send this email reply required" unless defined $_;
1194                 if (/^n/i) {
1195                         return 0;
1196                 } elsif (/^q/i) {
1197                         cleanup_compose_files();
1198                         exit(0);
1199                 } elsif (/^a/i) {
1200                         $confirm = 'never';
1201                 }
1202         }
1203
1204         unshift (@sendmail_parameters, @smtp_server_options);
1205
1206         if ($dry_run) {
1207                 # We don't want to send the email.
1208         } elsif ($smtp_server =~ m#^/#) {
1209                 my $pid = open my $sm, '|-';
1210                 defined $pid or die $!;
1211                 if (!$pid) {
1212                         exec($smtp_server, @sendmail_parameters) or die $!;
1213                 }
1214                 print $sm "$header\n$message";
1215                 close $sm or die $!;
1216         } else {
1217
1218                 if (!defined $smtp_server) {
1219                         die "The required SMTP server is not properly defined."
1220                 }
1221
1222                 if ($smtp_encryption eq 'ssl') {
1223                         $smtp_server_port ||= 465; # ssmtp
1224                         require Net::SMTP::SSL;
1225                         $smtp_domain ||= maildomain();
1226                         require IO::Socket::SSL;
1227                         # Net::SMTP::SSL->new() does not forward any SSL options
1228                         IO::Socket::SSL::set_client_defaults(
1229                                 ssl_verify_params());
1230                         $smtp ||= Net::SMTP::SSL->new($smtp_server,
1231                                                       Hello => $smtp_domain,
1232                                                       Port => $smtp_server_port,
1233                                                       Debug => $debug_net_smtp);
1234                 }
1235                 else {
1236                         require Net::SMTP;
1237                         $smtp_domain ||= maildomain();
1238                         $smtp_server_port ||= 25;
1239                         $smtp ||= Net::SMTP->new($smtp_server,
1240                                                  Hello => $smtp_domain,
1241                                                  Debug => $debug_net_smtp,
1242                                                  Port => $smtp_server_port);
1243                         if ($smtp_encryption eq 'tls' && $smtp) {
1244                                 require Net::SMTP::SSL;
1245                                 $smtp->command('STARTTLS');
1246                                 $smtp->response();
1247                                 if ($smtp->code == 220) {
1248                                         $smtp = Net::SMTP::SSL->start_SSL($smtp,
1249                                                                           ssl_verify_params())
1250                                                 or die "STARTTLS failed! ".IO::Socket::SSL::errstr();
1251                                         $smtp_encryption = '';
1252                                         # Send EHLO again to receive fresh
1253                                         # supported commands
1254                                         $smtp->hello($smtp_domain);
1255                                 } else {
1256                                         die "Server does not support STARTTLS! ".$smtp->message;
1257                                 }
1258                         }
1259                 }
1260
1261                 if (!$smtp) {
1262                         die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
1263                             "VALUES: server=$smtp_server ",
1264                             "encryption=$smtp_encryption ",
1265                             "hello=$smtp_domain",
1266                             defined $smtp_server_port ? " port=$smtp_server_port" : "";
1267                 }
1268
1269                 smtp_auth_maybe or die $smtp->message;
1270
1271                 $smtp->mail( $raw_from ) or die $smtp->message;
1272                 $smtp->to( @recipients ) or die $smtp->message;
1273                 $smtp->data or die $smtp->message;
1274                 $smtp->datasend("$header\n$message") or die $smtp->message;
1275                 $smtp->dataend() or die $smtp->message;
1276                 $smtp->code =~ /250|200/ or die "Failed to send $subject\n".$smtp->message;
1277         }
1278         if ($quiet) {
1279                 printf (($dry_run ? "Dry-" : "")."Sent %s\n", $subject);
1280         } else {
1281                 print (($dry_run ? "Dry-" : "")."OK. Log says:\n");
1282                 if ($smtp_server !~ m#^/#) {
1283                         print "Server: $smtp_server\n";
1284                         print "MAIL FROM:<$raw_from>\n";
1285                         foreach my $entry (@recipients) {
1286                             print "RCPT TO:<$entry>\n";
1287                         }
1288                 } else {
1289                         print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1290                 }
1291                 print $header, "\n";
1292                 if ($smtp) {
1293                         print "Result: ", $smtp->code, ' ',
1294                                 ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1295                 } else {
1296                         print "Result: OK\n";
1297                 }
1298         }
1299
1300         return 1;
1301 }
1302
1303 $reply_to = $initial_reply_to;
1304 $references = $initial_reply_to || '';
1305 $subject = $initial_subject;
1306 $message_num = 0;
1307
1308 foreach my $t (@files) {
1309         open my $fh, "<", $t or die "can't open file $t";
1310
1311         my $author = undef;
1312         my $sauthor = undef;
1313         my $author_encoding;
1314         my $has_content_type;
1315         my $body_encoding;
1316         @to = ();
1317         @cc = ();
1318         @xh = ();
1319         my $input_format = undef;
1320         my @header = ();
1321         $message = "";
1322         $message_num++;
1323         # First unfold multiline header fields
1324         while(<$fh>) {
1325                 last if /^\s*$/;
1326                 if (/^\s+\S/ and @header) {
1327                         chomp($header[$#header]);
1328                         s/^\s+/ /;
1329                         $header[$#header] .= $_;
1330             } else {
1331                         push(@header, $_);
1332                 }
1333         }
1334         # Now parse the header
1335         foreach(@header) {
1336                 if (/^From /) {
1337                         $input_format = 'mbox';
1338                         next;
1339                 }
1340                 chomp;
1341                 if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1342                         $input_format = 'mbox';
1343                 }
1344
1345                 if (defined $input_format && $input_format eq 'mbox') {
1346                         if (/^Subject:\s+(.*)$/i) {
1347                                 $subject = $1;
1348                         }
1349                         elsif (/^From:\s+(.*)$/i) {
1350                                 ($author, $author_encoding) = unquote_rfc2047($1);
1351                                 $sauthor = sanitize_address($author);
1352                                 next if $suppress_cc{'author'};
1353                                 next if $suppress_cc{'self'} and $sauthor eq $sender;
1354                                 printf("(mbox) Adding cc: %s from line '%s'\n",
1355                                         $1, $_) unless $quiet;
1356                                 push @cc, $1;
1357                         }
1358                         elsif (/^To:\s+(.*)$/i) {
1359                                 foreach my $addr (parse_address_line($1)) {
1360                                         printf("(mbox) Adding to: %s from line '%s'\n",
1361                                                 $addr, $_) unless $quiet;
1362                                         push @to, $addr;
1363                                 }
1364                         }
1365                         elsif (/^Cc:\s+(.*)$/i) {
1366                                 foreach my $addr (parse_address_line($1)) {
1367                                         my $qaddr = unquote_rfc2047($addr);
1368                                         my $saddr = sanitize_address($qaddr);
1369                                         if ($saddr eq $sender) {
1370                                                 next if ($suppress_cc{'self'});
1371                                         } else {
1372                                                 next if ($suppress_cc{'cc'});
1373                                         }
1374                                         printf("(mbox) Adding cc: %s from line '%s'\n",
1375                                                 $addr, $_) unless $quiet;
1376                                         push @cc, $addr;
1377                                 }
1378                         }
1379                         elsif (/^Content-type:/i) {
1380                                 $has_content_type = 1;
1381                                 if (/charset="?([^ "]+)/) {
1382                                         $body_encoding = $1;
1383                                 }
1384                                 push @xh, $_;
1385                         }
1386                         elsif (/^Message-Id: (.*)/i) {
1387                                 $message_id = $1;
1388                         }
1389                         elsif (!/^Date:\s/i && /^[-A-Za-z]+:\s+\S/) {
1390                                 push @xh, $_;
1391                         }
1392
1393                 } else {
1394                         # In the traditional
1395                         # "send lots of email" format,
1396                         # line 1 = cc
1397                         # line 2 = subject
1398                         # So let's support that, too.
1399                         $input_format = 'lots';
1400                         if (@cc == 0 && !$suppress_cc{'cc'}) {
1401                                 printf("(non-mbox) Adding cc: %s from line '%s'\n",
1402                                         $_, $_) unless $quiet;
1403                                 push @cc, $_;
1404                         } elsif (!defined $subject) {
1405                                 $subject = $_;
1406                         }
1407                 }
1408         }
1409         # Now parse the message body
1410         while(<$fh>) {
1411                 $message .=  $_;
1412                 if (/^(Signed-off-by|Cc): (.*)$/i) {
1413                         chomp;
1414                         my ($what, $c) = ($1, $2);
1415                         chomp $c;
1416                         my $sc = sanitize_address($c);
1417                         if ($sc eq $sender) {
1418                                 next if ($suppress_cc{'self'});
1419                         } else {
1420                                 next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1421                                 next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1422                         }
1423                         push @cc, $c;
1424                         printf("(body) Adding cc: %s from line '%s'\n",
1425                                 $c, $_) unless $quiet;
1426                 }
1427         }
1428         close $fh;
1429
1430         push @to, recipients_cmd("to-cmd", "to", $to_cmd, $t)
1431                 if defined $to_cmd;
1432         push @cc, recipients_cmd("cc-cmd", "cc", $cc_cmd, $t)
1433                 if defined $cc_cmd && !$suppress_cc{'cccmd'};
1434
1435         if ($broken_encoding{$t} && !$has_content_type) {
1436                 $has_content_type = 1;
1437                 push @xh, "MIME-Version: 1.0",
1438                         "Content-Type: text/plain; charset=$auto_8bit_encoding",
1439                         "Content-Transfer-Encoding: 8bit";
1440                 $body_encoding = $auto_8bit_encoding;
1441         }
1442
1443         if ($broken_encoding{$t} && !is_rfc2047_quoted($subject)) {
1444                 $subject = quote_subject($subject, $auto_8bit_encoding);
1445         }
1446
1447         if (defined $sauthor and $sauthor ne $sender) {
1448                 $message = "From: $author\n\n$message";
1449                 if (defined $author_encoding) {
1450                         if ($has_content_type) {
1451                                 if ($body_encoding eq $author_encoding) {
1452                                         # ok, we already have the right encoding
1453                                 }
1454                                 else {
1455                                         # uh oh, we should re-encode
1456                                 }
1457                         }
1458                         else {
1459                                 $has_content_type = 1;
1460                                 push @xh,
1461                                   'MIME-Version: 1.0',
1462                                   "Content-Type: text/plain; charset=$author_encoding",
1463                                   'Content-Transfer-Encoding: 8bit';
1464                         }
1465                 }
1466         }
1467
1468         $needs_confirm = (
1469                 $confirm eq "always" or
1470                 ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1471                 ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1472         $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1473
1474         @to = validate_address_list(sanitize_address_list(@to));
1475         @cc = validate_address_list(sanitize_address_list(@cc));
1476
1477         @to = (@initial_to, @to);
1478         @cc = (@initial_cc, @cc);
1479
1480         my $message_was_sent = send_message();
1481
1482         # set up for the next message
1483         if ($thread && $message_was_sent &&
1484                 ($chain_reply_to || !defined $reply_to || length($reply_to) == 0 ||
1485                 $message_num == 1)) {
1486                 $reply_to = $message_id;
1487                 if (length $references > 0) {
1488                         $references .= "\n $message_id";
1489                 } else {
1490                         $references = "$message_id";
1491                 }
1492         }
1493         $message_id = undef;
1494 }
1495
1496 # Execute a command (e.g. $to_cmd) to get a list of email addresses
1497 # and return a results array
1498 sub recipients_cmd {
1499         my ($prefix, $what, $cmd, $file) = @_;
1500
1501         my @addresses = ();
1502         open my $fh, "-|", "$cmd \Q$file\E"
1503             or die "($prefix) Could not execute '$cmd'";
1504         while (my $address = <$fh>) {
1505                 $address =~ s/^\s*//g;
1506                 $address =~ s/\s*$//g;
1507                 $address = sanitize_address($address);
1508                 next if ($address eq $sender and $suppress_cc{'self'});
1509                 push @addresses, $address;
1510                 printf("($prefix) Adding %s: %s from: '%s'\n",
1511                        $what, $address, $cmd) unless $quiet;
1512                 }
1513         close $fh
1514             or die "($prefix) failed to close pipe to '$cmd'";
1515         return @addresses;
1516 }
1517
1518 cleanup_compose_files();
1519
1520 sub cleanup_compose_files {
1521         unlink($compose_filename, $compose_filename . ".final") if $compose;
1522 }
1523
1524 $smtp->quit if $smtp;
1525
1526 sub unique_email_list {
1527         my %seen;
1528         my @emails;
1529
1530         foreach my $entry (@_) {
1531                 my $clean = extract_valid_address_or_die($entry);
1532                 $seen{$clean} ||= 0;
1533                 next if $seen{$clean}++;
1534                 push @emails, $entry;
1535         }
1536         return @emails;
1537 }
1538
1539 sub validate_patch {
1540         my $fn = shift;
1541         open(my $fh, '<', $fn)
1542                 or die "unable to open $fn: $!\n";
1543         while (my $line = <$fh>) {
1544                 if (length($line) > 998) {
1545                         return "$.: patch contains a line longer than 998 characters";
1546                 }
1547         }
1548         return;
1549 }
1550
1551 sub file_has_nonascii {
1552         my $fn = shift;
1553         open(my $fh, '<', $fn)
1554                 or die "unable to open $fn: $!\n";
1555         while (my $line = <$fh>) {
1556                 return 1 if $line =~ /[^[:ascii:]]/;
1557         }
1558         return 0;
1559 }
1560
1561 sub body_or_subject_has_nonascii {
1562         my $fn = shift;
1563         open(my $fh, '<', $fn)
1564                 or die "unable to open $fn: $!\n";
1565         while (my $line = <$fh>) {
1566                 last if $line =~ /^$/;
1567                 return 1 if $line =~ /^Subject.*[^[:ascii:]]/;
1568         }
1569         while (my $line = <$fh>) {
1570                 return 1 if $line =~ /[^[:ascii:]]/;
1571         }
1572         return 0;
1573 }