git-send-email.perlon commit Merge branch 'bp/fsmonitor-bufsize-fix' (beed7e2)
   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
  19use 5.008;
  20use strict;
  21use warnings;
  22use POSIX qw/strftime/;
  23use Term::ReadLine;
  24use Getopt::Long;
  25use Text::ParseWords;
  26use Term::ANSIColor;
  27use File::Temp qw/ tempdir tempfile /;
  28use File::Spec::Functions qw(catdir catfile);
  29use Git::LoadCPAN::Error qw(:try);
  30use Cwd qw(abs_path cwd);
  31use Git;
  32use Git::I18N;
  33use Net::Domain ();
  34use Net::SMTP ();
  35use Git::LoadCPAN::Mail::Address;
  36
  37Getopt::Long::Configure qw/ pass_through /;
  38
  39package FakeTerm;
  40sub new {
  41        my ($class, $reason) = @_;
  42        return bless \$reason, shift;
  43}
  44sub readline {
  45        my $self = shift;
  46        die "Cannot use readline on FakeTerm: $$self";
  47}
  48package main;
  49
  50
  51sub usage {
  52        print <<EOT;
  53git send-email [options] <file | directory | rev-list options >
  54git send-email --dump-aliases
  55
  56  Composing:
  57    --from                  <str>  * Email From:
  58    --[no-]to               <str>  * Email To:
  59    --[no-]cc               <str>  * Email Cc:
  60    --[no-]bcc              <str>  * Email Bcc:
  61    --subject               <str>  * Email "Subject:"
  62    --reply-to              <str>  * Email "Reply-To:"
  63    --in-reply-to           <str>  * Email "In-Reply-To:"
  64    --[no-]xmailer                 * Add "X-Mailer:" header (default).
  65    --[no-]annotate                * Review each patch that will be sent in an editor.
  66    --compose                      * Open an editor for introduction.
  67    --compose-encoding      <str>  * Encoding to assume for introduction.
  68    --8bit-encoding         <str>  * Encoding to assume 8bit mails if undeclared
  69    --transfer-encoding     <str>  * Transfer encoding to use (quoted-printable, 8bit, base64)
  70
  71  Sending:
  72    --envelope-sender       <str>  * Email envelope sender.
  73    --smtp-server       <str:int>  * Outgoing SMTP server to use. The port
  74                                     is optional. Default 'localhost'.
  75    --smtp-server-option    <str>  * Outgoing SMTP server option to use.
  76    --smtp-server-port      <int>  * Outgoing SMTP server port.
  77    --smtp-user             <str>  * Username for SMTP-AUTH.
  78    --smtp-pass             <str>  * Password for SMTP-AUTH; not necessary.
  79    --smtp-encryption       <str>  * tls or ssl; anything else disables.
  80    --smtp-ssl                     * Deprecated. Use '--smtp-encryption ssl'.
  81    --smtp-ssl-cert-path    <str>  * Path to ca-certificates (either directory or file).
  82                                     Pass an empty string to disable certificate
  83                                     verification.
  84    --smtp-domain           <str>  * The domain name sent to HELO/EHLO handshake
  85    --smtp-auth             <str>  * Space-separated list of allowed AUTH mechanisms.
  86                                     This setting forces to use one of the listed mechanisms.
  87    --smtp-debug            <0|1>  * Disable, enable Net::SMTP debug.
  88
  89    --batch-size            <int>  * send max <int> message per connection.
  90    --relogin-delay         <int>  * delay <int> seconds between two successive login.
  91                                     This option can only be used with --batch-size
  92
  93  Automating:
  94    --identity              <str>  * Use the sendemail.<id> options.
  95    --to-cmd                <str>  * Email To: via `<str> \$patch_path`
  96    --cc-cmd                <str>  * Email Cc: via `<str> \$patch_path`
  97    --suppress-cc           <str>  * author, self, sob, cc, cccmd, body, bodycc, all.
  98    --[no-]cc-cover                * Email Cc: addresses in the cover letter.
  99    --[no-]to-cover                * Email To: addresses in the cover letter.
 100    --[no-]signed-off-by-cc        * Send to Signed-off-by: addresses. Default on.
 101    --[no-]suppress-from           * Send to self. Default off.
 102    --[no-]chain-reply-to          * Chain In-Reply-To: fields. Default off.
 103    --[no-]thread                  * Use In-Reply-To: field. Default on.
 104
 105  Administering:
 106    --confirm               <str>  * Confirm recipients before sending;
 107                                     auto, cc, compose, always, or never.
 108    --quiet                        * Output one line of info per email.
 109    --dry-run                      * Don't actually send the emails.
 110    --[no-]validate                * Perform patch sanity checks. Default on.
 111    --[no-]format-patch            * understand any non optional arguments as
 112                                     `git format-patch` ones.
 113    --force                        * Send even if safety checks would prevent it.
 114
 115  Information:
 116    --dump-aliases                 * Dump configured aliases and exit.
 117
 118EOT
 119        exit(1);
 120}
 121
 122# most mail servers generate the Date: header, but not all...
 123sub format_2822_time {
 124        my ($time) = @_;
 125        my @localtm = localtime($time);
 126        my @gmttm = gmtime($time);
 127        my $localmin = $localtm[1] + $localtm[2] * 60;
 128        my $gmtmin = $gmttm[1] + $gmttm[2] * 60;
 129        if ($localtm[0] != $gmttm[0]) {
 130                die __("local zone differs from GMT by a non-minute interval\n");
 131        }
 132        if ((($gmttm[6] + 1) % 7) == $localtm[6]) {
 133                $localmin += 1440;
 134        } elsif ((($gmttm[6] - 1) % 7) == $localtm[6]) {
 135                $localmin -= 1440;
 136        } elsif ($gmttm[6] != $localtm[6]) {
 137                die __("local time offset greater than or equal to 24 hours\n");
 138        }
 139        my $offset = $localmin - $gmtmin;
 140        my $offhour = $offset / 60;
 141        my $offmin = abs($offset % 60);
 142        if (abs($offhour) >= 24) {
 143                die __("local time offset greater than or equal to 24 hours\n");
 144        }
 145
 146        return sprintf("%s, %2d %s %d %02d:%02d:%02d %s%02d%02d",
 147                       qw(Sun Mon Tue Wed Thu Fri Sat)[$localtm[6]],
 148                       $localtm[3],
 149                       qw(Jan Feb Mar Apr May Jun
 150                          Jul Aug Sep Oct Nov Dec)[$localtm[4]],
 151                       $localtm[5]+1900,
 152                       $localtm[2],
 153                       $localtm[1],
 154                       $localtm[0],
 155                       ($offset >= 0) ? '+' : '-',
 156                       abs($offhour),
 157                       $offmin,
 158                       );
 159}
 160
 161my $have_email_valid = eval { require Email::Valid; 1 };
 162my $smtp;
 163my $auth;
 164my $num_sent = 0;
 165
 166# Regexes for RFC 2047 productions.
 167my $re_token = qr/[^][()<>@,;:\\"\/?.= \000-\037\177-\377]+/;
 168my $re_encoded_text = qr/[^? \000-\037\177-\377]+/;
 169my $re_encoded_word = qr/=\?($re_token)\?($re_token)\?($re_encoded_text)\?=/;
 170
 171# Variables we fill in automatically, or via prompting:
 172my (@to,$no_to,@initial_to,@cc,$no_cc,@initial_cc,@bcclist,$no_bcc,@xh,
 173        $initial_in_reply_to,$reply_to,$initial_subject,@files,
 174        $author,$sender,$smtp_authpass,$annotate,$use_xmailer,$compose,$time);
 175
 176my $envelope_sender;
 177
 178# Example reply to:
 179#$initial_in_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
 180
 181my $repo = eval { Git->repository() };
 182my @repo = $repo ? ($repo) : ();
 183my $term = eval {
 184        $ENV{"GIT_SEND_EMAIL_NOTTY"}
 185                ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
 186                : new Term::ReadLine 'git-send-email';
 187};
 188if ($@) {
 189        $term = new FakeTerm "$@: going non-interactive";
 190}
 191
 192# Behavior modification variables
 193my ($quiet, $dry_run) = (0, 0);
 194my $format_patch;
 195my $compose_filename;
 196my $force = 0;
 197my $dump_aliases = 0;
 198
 199# Handle interactive edition of files.
 200my $multiedit;
 201my $editor;
 202
 203sub do_edit {
 204        if (!defined($editor)) {
 205                $editor = Git::command_oneline('var', 'GIT_EDITOR');
 206        }
 207        if (defined($multiedit) && !$multiedit) {
 208                map {
 209                        system('sh', '-c', $editor.' "$@"', $editor, $_);
 210                        if (($? & 127) || ($? >> 8)) {
 211                                die(__("the editor exited uncleanly, aborting everything"));
 212                        }
 213                } @_;
 214        } else {
 215                system('sh', '-c', $editor.' "$@"', $editor, @_);
 216                if (($? & 127) || ($? >> 8)) {
 217                        die(__("the editor exited uncleanly, aborting everything"));
 218                }
 219        }
 220}
 221
 222# Variables with corresponding config settings
 223my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc);
 224my ($cover_cc, $cover_to);
 225my ($to_cmd, $cc_cmd);
 226my ($smtp_server, $smtp_server_port, @smtp_server_options);
 227my ($smtp_authuser, $smtp_encryption, $smtp_ssl_cert_path);
 228my ($batch_size, $relogin_delay);
 229my ($identity, $aliasfiletype, @alias_files, $smtp_domain, $smtp_auth);
 230my ($validate, $confirm);
 231my (@suppress_cc);
 232my ($auto_8bit_encoding);
 233my ($compose_encoding);
 234my ($target_xfer_encoding);
 235
 236my ($debug_net_smtp) = 0;               # Net::SMTP, see send_message()
 237
 238my %config_bool_settings = (
 239    "thread" => [\$thread, 1],
 240    "chainreplyto" => [\$chain_reply_to, 0],
 241    "suppressfrom" => [\$suppress_from, undef],
 242    "signedoffbycc" => [\$signed_off_by_cc, undef],
 243    "cccover" => [\$cover_cc, undef],
 244    "tocover" => [\$cover_to, undef],
 245    "signedoffcc" => [\$signed_off_by_cc, undef],      # Deprecated
 246    "validate" => [\$validate, 1],
 247    "multiedit" => [\$multiedit, undef],
 248    "annotate" => [\$annotate, undef],
 249    "xmailer" => [\$use_xmailer, 1]
 250);
 251
 252my %config_settings = (
 253    "smtpserver" => \$smtp_server,
 254    "smtpserverport" => \$smtp_server_port,
 255    "smtpserveroption" => \@smtp_server_options,
 256    "smtpuser" => \$smtp_authuser,
 257    "smtppass" => \$smtp_authpass,
 258    "smtpdomain" => \$smtp_domain,
 259    "smtpauth" => \$smtp_auth,
 260    "smtpbatchsize" => \$batch_size,
 261    "smtprelogindelay" => \$relogin_delay,
 262    "to" => \@initial_to,
 263    "tocmd" => \$to_cmd,
 264    "cc" => \@initial_cc,
 265    "cccmd" => \$cc_cmd,
 266    "aliasfiletype" => \$aliasfiletype,
 267    "bcc" => \@bcclist,
 268    "suppresscc" => \@suppress_cc,
 269    "envelopesender" => \$envelope_sender,
 270    "confirm"   => \$confirm,
 271    "from" => \$sender,
 272    "assume8bitencoding" => \$auto_8bit_encoding,
 273    "composeencoding" => \$compose_encoding,
 274    "transferencoding" => \$target_xfer_encoding,
 275);
 276
 277my %config_path_settings = (
 278    "aliasesfile" => \@alias_files,
 279    "smtpsslcertpath" => \$smtp_ssl_cert_path,
 280);
 281
 282# Handle Uncouth Termination
 283sub signal_handler {
 284
 285        # Make text normal
 286        print color("reset"), "\n";
 287
 288        # SMTP password masked
 289        system "stty echo";
 290
 291        # tmp files from --compose
 292        if (defined $compose_filename) {
 293                if (-e $compose_filename) {
 294                        printf __("'%s' contains an intermediate version ".
 295                                  "of the email you were composing.\n"),
 296                                  $compose_filename;
 297                }
 298                if (-e ($compose_filename . ".final")) {
 299                        printf __("'%s.final' contains the composed email.\n"),
 300                                  $compose_filename;
 301                }
 302        }
 303
 304        exit;
 305};
 306
 307$SIG{TERM} = \&signal_handler;
 308$SIG{INT}  = \&signal_handler;
 309
 310# Begin by accumulating all the variables (defined above), that we will end up
 311# needing, first, from the command line:
 312
 313my $help;
 314my $rc = GetOptions("h" => \$help,
 315                    "dump-aliases" => \$dump_aliases);
 316usage() unless $rc;
 317die __("--dump-aliases incompatible with other options\n")
 318    if !$help and $dump_aliases and @ARGV;
 319$rc = GetOptions(
 320                    "sender|from=s" => \$sender,
 321                    "in-reply-to=s" => \$initial_in_reply_to,
 322                    "reply-to=s" => \$reply_to,
 323                    "subject=s" => \$initial_subject,
 324                    "to=s" => \@initial_to,
 325                    "to-cmd=s" => \$to_cmd,
 326                    "no-to" => \$no_to,
 327                    "cc=s" => \@initial_cc,
 328                    "no-cc" => \$no_cc,
 329                    "bcc=s" => \@bcclist,
 330                    "no-bcc" => \$no_bcc,
 331                    "chain-reply-to!" => \$chain_reply_to,
 332                    "no-chain-reply-to" => sub {$chain_reply_to = 0},
 333                    "smtp-server=s" => \$smtp_server,
 334                    "smtp-server-option=s" => \@smtp_server_options,
 335                    "smtp-server-port=s" => \$smtp_server_port,
 336                    "smtp-user=s" => \$smtp_authuser,
 337                    "smtp-pass:s" => \$smtp_authpass,
 338                    "smtp-ssl" => sub { $smtp_encryption = 'ssl' },
 339                    "smtp-encryption=s" => \$smtp_encryption,
 340                    "smtp-ssl-cert-path=s" => \$smtp_ssl_cert_path,
 341                    "smtp-debug:i" => \$debug_net_smtp,
 342                    "smtp-domain:s" => \$smtp_domain,
 343                    "smtp-auth=s" => \$smtp_auth,
 344                    "identity=s" => \$identity,
 345                    "annotate!" => \$annotate,
 346                    "no-annotate" => sub {$annotate = 0},
 347                    "compose" => \$compose,
 348                    "quiet" => \$quiet,
 349                    "cc-cmd=s" => \$cc_cmd,
 350                    "suppress-from!" => \$suppress_from,
 351                    "no-suppress-from" => sub {$suppress_from = 0},
 352                    "suppress-cc=s" => \@suppress_cc,
 353                    "signed-off-cc|signed-off-by-cc!" => \$signed_off_by_cc,
 354                    "no-signed-off-cc|no-signed-off-by-cc" => sub {$signed_off_by_cc = 0},
 355                    "cc-cover|cc-cover!" => \$cover_cc,
 356                    "no-cc-cover" => sub {$cover_cc = 0},
 357                    "to-cover|to-cover!" => \$cover_to,
 358                    "no-to-cover" => sub {$cover_to = 0},
 359                    "confirm=s" => \$confirm,
 360                    "dry-run" => \$dry_run,
 361                    "envelope-sender=s" => \$envelope_sender,
 362                    "thread!" => \$thread,
 363                    "no-thread" => sub {$thread = 0},
 364                    "validate!" => \$validate,
 365                    "no-validate" => sub {$validate = 0},
 366                    "transfer-encoding=s" => \$target_xfer_encoding,
 367                    "format-patch!" => \$format_patch,
 368                    "no-format-patch" => sub {$format_patch = 0},
 369                    "8bit-encoding=s" => \$auto_8bit_encoding,
 370                    "compose-encoding=s" => \$compose_encoding,
 371                    "force" => \$force,
 372                    "xmailer!" => \$use_xmailer,
 373                    "no-xmailer" => sub {$use_xmailer = 0},
 374                    "batch-size=i" => \$batch_size,
 375                    "relogin-delay=i" => \$relogin_delay,
 376         );
 377
 378usage() if $help;
 379unless ($rc) {
 380    usage();
 381}
 382
 383die __("Cannot run git format-patch from outside a repository\n")
 384        if $format_patch and not $repo;
 385
 386die __("`batch-size` and `relogin` must be specified together " .
 387        "(via command-line or configuration option)\n")
 388        if defined $relogin_delay and not defined $batch_size;
 389
 390# Now, let's fill any that aren't set in with defaults:
 391
 392sub read_config {
 393        my ($prefix) = @_;
 394
 395        foreach my $setting (keys %config_bool_settings) {
 396                my $target = $config_bool_settings{$setting}->[0];
 397                $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
 398        }
 399
 400        foreach my $setting (keys %config_path_settings) {
 401                my $target = $config_path_settings{$setting};
 402                if (ref($target) eq "ARRAY") {
 403                        unless (@$target) {
 404                                my @values = Git::config_path(@repo, "$prefix.$setting");
 405                                @$target = @values if (@values && defined $values[0]);
 406                        }
 407                }
 408                else {
 409                        $$target = Git::config_path(@repo, "$prefix.$setting") unless (defined $$target);
 410                }
 411        }
 412
 413        foreach my $setting (keys %config_settings) {
 414                my $target = $config_settings{$setting};
 415                next if $setting eq "to" and defined $no_to;
 416                next if $setting eq "cc" and defined $no_cc;
 417                next if $setting eq "bcc" and defined $no_bcc;
 418                if (ref($target) eq "ARRAY") {
 419                        unless (@$target) {
 420                                my @values = Git::config(@repo, "$prefix.$setting");
 421                                @$target = @values if (@values && defined $values[0]);
 422                        }
 423                }
 424                else {
 425                        $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
 426                }
 427        }
 428
 429        if (!defined $smtp_encryption) {
 430                my $enc = Git::config(@repo, "$prefix.smtpencryption");
 431                if (defined $enc) {
 432                        $smtp_encryption = $enc;
 433                } elsif (Git::config_bool(@repo, "$prefix.smtpssl")) {
 434                        $smtp_encryption = 'ssl';
 435                }
 436        }
 437}
 438
 439# read configuration from [sendemail "$identity"], fall back on [sendemail]
 440$identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
 441read_config("sendemail.$identity") if (defined $identity);
 442read_config("sendemail");
 443
 444# fall back on builtin bool defaults
 445foreach my $setting (values %config_bool_settings) {
 446        ${$setting->[0]} = $setting->[1] unless (defined (${$setting->[0]}));
 447}
 448
 449# 'default' encryption is none -- this only prevents a warning
 450$smtp_encryption = '' unless (defined $smtp_encryption);
 451
 452# Set CC suppressions
 453my(%suppress_cc);
 454if (@suppress_cc) {
 455        foreach my $entry (@suppress_cc) {
 456                die sprintf(__("Unknown --suppress-cc field: '%s'\n"), $entry)
 457                        unless $entry =~ /^(?:all|cccmd|cc|author|self|sob|body|bodycc)$/;
 458                $suppress_cc{$entry} = 1;
 459        }
 460}
 461
 462if ($suppress_cc{'all'}) {
 463        foreach my $entry (qw (cccmd cc author self sob body bodycc)) {
 464                $suppress_cc{$entry} = 1;
 465        }
 466        delete $suppress_cc{'all'};
 467}
 468
 469# If explicit old-style ones are specified, they trump --suppress-cc.
 470$suppress_cc{'self'} = $suppress_from if defined $suppress_from;
 471$suppress_cc{'sob'} = !$signed_off_by_cc if defined $signed_off_by_cc;
 472
 473if ($suppress_cc{'body'}) {
 474        foreach my $entry (qw (sob bodycc)) {
 475                $suppress_cc{$entry} = 1;
 476        }
 477        delete $suppress_cc{'body'};
 478}
 479
 480# Set confirm's default value
 481my $confirm_unconfigured = !defined $confirm;
 482if ($confirm_unconfigured) {
 483        $confirm = scalar %suppress_cc ? 'compose' : 'auto';
 484};
 485die sprintf(__("Unknown --confirm setting: '%s'\n"), $confirm)
 486        unless $confirm =~ /^(?:auto|cc|compose|always|never)/;
 487
 488# Debugging, print out the suppressions.
 489if (0) {
 490        print "suppressions:\n";
 491        foreach my $entry (keys %suppress_cc) {
 492                printf "  %-5s -> $suppress_cc{$entry}\n", $entry;
 493        }
 494}
 495
 496my ($repoauthor, $repocommitter);
 497($repoauthor) = Git::ident_person(@repo, 'author');
 498($repocommitter) = Git::ident_person(@repo, 'committer');
 499
 500sub parse_address_line {
 501        return map { $_->format } Mail::Address->parse($_[0]);
 502}
 503
 504sub split_addrs {
 505        return quotewords('\s*,\s*', 1, @_);
 506}
 507
 508my %aliases;
 509
 510sub parse_sendmail_alias {
 511        local $_ = shift;
 512        if (/"/) {
 513                printf STDERR __("warning: sendmail alias with quotes is not supported: %s\n"), $_;
 514        } elsif (/:include:/) {
 515                printf STDERR __("warning: `:include:` not supported: %s\n"), $_;
 516        } elsif (/[\/|]/) {
 517                printf STDERR __("warning: `/file` or `|pipe` redirection not supported: %s\n"), $_;
 518        } elsif (/^(\S+?)\s*:\s*(.+)$/) {
 519                my ($alias, $addr) = ($1, $2);
 520                $aliases{$alias} = [ split_addrs($addr) ];
 521        } else {
 522                printf STDERR __("warning: sendmail line is not recognized: %s\n"), $_;
 523        }
 524}
 525
 526sub parse_sendmail_aliases {
 527        my $fh = shift;
 528        my $s = '';
 529        while (<$fh>) {
 530                chomp;
 531                next if /^\s*$/ || /^\s*#/;
 532                $s .= $_, next if $s =~ s/\\$// || s/^\s+//;
 533                parse_sendmail_alias($s) if $s;
 534                $s = $_;
 535        }
 536        $s =~ s/\\$//; # silently tolerate stray '\' on last line
 537        parse_sendmail_alias($s) if $s;
 538}
 539
 540my %parse_alias = (
 541        # multiline formats can be supported in the future
 542        mutt => sub { my $fh = shift; while (<$fh>) {
 543                if (/^\s*alias\s+(?:-group\s+\S+\s+)*(\S+)\s+(.*)$/) {
 544                        my ($alias, $addr) = ($1, $2);
 545                        $addr =~ s/#.*$//; # mutt allows # comments
 546                        # commas delimit multiple addresses
 547                        my @addr = split_addrs($addr);
 548
 549                        # quotes may be escaped in the file,
 550                        # unescape them so we do not double-escape them later.
 551                        s/\\"/"/g foreach @addr;
 552                        $aliases{$alias} = \@addr
 553                }}},
 554        mailrc => sub { my $fh = shift; while (<$fh>) {
 555                if (/^alias\s+(\S+)\s+(.*?)\s*$/) {
 556                        # spaces delimit multiple addresses
 557                        $aliases{$1} = [ quotewords('\s+', 0, $2) ];
 558                }}},
 559        pine => sub { my $fh = shift; my $f='\t[^\t]*';
 560                for (my $x = ''; defined($x); $x = $_) {
 561                        chomp $x;
 562                        $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
 563                        $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
 564                        $aliases{$1} = [ split_addrs($2) ];
 565                }},
 566        elm => sub  { my $fh = shift;
 567                      while (<$fh>) {
 568                          if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
 569                              my ($alias, $addr) = ($1, $2);
 570                               $aliases{$alias} = [ split_addrs($addr) ];
 571                          }
 572                      } },
 573        sendmail => \&parse_sendmail_aliases,
 574        gnus => sub { my $fh = shift; while (<$fh>) {
 575                if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
 576                        $aliases{$1} = [ $2 ];
 577                }}}
 578);
 579
 580if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
 581        foreach my $file (@alias_files) {
 582                open my $fh, '<', $file or die "opening $file: $!\n";
 583                $parse_alias{$aliasfiletype}->($fh);
 584                close $fh;
 585        }
 586}
 587
 588if ($dump_aliases) {
 589    print "$_\n" for (sort keys %aliases);
 590    exit(0);
 591}
 592
 593# is_format_patch_arg($f) returns 0 if $f names a patch, or 1 if
 594# $f is a revision list specification to be passed to format-patch.
 595sub is_format_patch_arg {
 596        return unless $repo;
 597        my $f = shift;
 598        try {
 599                $repo->command('rev-parse', '--verify', '--quiet', $f);
 600                if (defined($format_patch)) {
 601                        return $format_patch;
 602                }
 603                die sprintf(__ <<EOF, $f, $f);
 604File '%s' exists but it could also be the range of commits
 605to produce patches for.  Please disambiguate by...
 606
 607    * Saying "./%s" if you mean a file; or
 608    * Giving --format-patch option if you mean a range.
 609EOF
 610        } catch Git::Error::Command with {
 611                # Not a valid revision.  Treat it as a filename.
 612                return 0;
 613        }
 614}
 615
 616# Now that all the defaults are set, process the rest of the command line
 617# arguments and collect up the files that need to be processed.
 618my @rev_list_opts;
 619while (defined(my $f = shift @ARGV)) {
 620        if ($f eq "--") {
 621                push @rev_list_opts, "--", @ARGV;
 622                @ARGV = ();
 623        } elsif (-d $f and !is_format_patch_arg($f)) {
 624                opendir my $dh, $f
 625                        or die sprintf(__("Failed to opendir %s: %s"), $f, $!);
 626
 627                push @files, grep { -f $_ } map { catfile($f, $_) }
 628                                sort readdir $dh;
 629                closedir $dh;
 630        } elsif ((-f $f or -p $f) and !is_format_patch_arg($f)) {
 631                push @files, $f;
 632        } else {
 633                push @rev_list_opts, $f;
 634        }
 635}
 636
 637if (@rev_list_opts) {
 638        die __("Cannot run git format-patch from outside a repository\n")
 639                unless $repo;
 640        push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
 641}
 642
 643@files = handle_backup_files(@files);
 644
 645if ($validate) {
 646        foreach my $f (@files) {
 647                unless (-p $f) {
 648                        my $error = validate_patch($f);
 649                        $error and die sprintf(__("fatal: %s: %s\nwarning: no patches were sent\n"),
 650                                                  $f, $error);
 651                }
 652        }
 653}
 654
 655if (@files) {
 656        unless ($quiet) {
 657                print $_,"\n" for (@files);
 658        }
 659} else {
 660        print STDERR __("\nNo patch files specified!\n\n");
 661        usage();
 662}
 663
 664sub get_patch_subject {
 665        my $fn = shift;
 666        open (my $fh, '<', $fn);
 667        while (my $line = <$fh>) {
 668                next unless ($line =~ /^Subject: (.*)$/);
 669                close $fh;
 670                return "GIT: $1\n";
 671        }
 672        close $fh;
 673        die sprintf(__("No subject line in %s?"), $fn);
 674}
 675
 676if ($compose) {
 677        # Note that this does not need to be secure, but we will make a small
 678        # effort to have it be unique
 679        $compose_filename = ($repo ?
 680                tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
 681                tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
 682        open my $c, ">", $compose_filename
 683                or die sprintf(__("Failed to open for writing %s: %s"), $compose_filename, $!);
 684
 685
 686        my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
 687        my $tpl_subject = $initial_subject || '';
 688        my $tpl_in_reply_to = $initial_in_reply_to || '';
 689        my $tpl_reply_to = $reply_to || '';
 690
 691        print $c <<EOT1, Git::prefix_lines("GIT: ", __ <<EOT2), <<EOT3;
 692From $tpl_sender # This line is ignored.
 693EOT1
 694Lines beginning in "GIT:" will be removed.
 695Consider including an overall diffstat or table of contents
 696for the patch you are writing.
 697
 698Clear the body content if you don't wish to send a summary.
 699EOT2
 700From: $tpl_sender
 701Reply-To: $tpl_reply_to
 702Subject: $tpl_subject
 703In-Reply-To: $tpl_in_reply_to
 704
 705EOT3
 706        for my $f (@files) {
 707                print $c get_patch_subject($f);
 708        }
 709        close $c;
 710
 711        if ($annotate) {
 712                do_edit($compose_filename, @files);
 713        } else {
 714                do_edit($compose_filename);
 715        }
 716
 717        open $c, "<", $compose_filename
 718                or die sprintf(__("Failed to open %s: %s"), $compose_filename, $!);
 719
 720        if (!defined $compose_encoding) {
 721                $compose_encoding = "UTF-8";
 722        }
 723
 724        my %parsed_email;
 725        while (my $line = <$c>) {
 726                next if $line =~ m/^GIT:/;
 727                parse_header_line($line, \%parsed_email);
 728                if ($line =~ /^$/) {
 729                        $parsed_email{'body'} = filter_body($c);
 730                }
 731        }
 732        close $c;
 733
 734        open my $c2, ">", $compose_filename . ".final"
 735        or die sprintf(__("Failed to open %s.final: %s"), $compose_filename, $!);
 736
 737
 738        if ($parsed_email{'From'}) {
 739                $sender = delete($parsed_email{'From'});
 740        }
 741        if ($parsed_email{'In-Reply-To'}) {
 742                $initial_in_reply_to = delete($parsed_email{'In-Reply-To'});
 743        }
 744        if ($parsed_email{'Reply-To'}) {
 745                $reply_to = delete($parsed_email{'Reply-To'});
 746        }
 747        if ($parsed_email{'Subject'}) {
 748                $initial_subject = delete($parsed_email{'Subject'});
 749                print $c2 "Subject: " .
 750                        quote_subject($initial_subject, $compose_encoding) .
 751                        "\n";
 752        }
 753
 754        if ($parsed_email{'MIME-Version'}) {
 755                print $c2 "MIME-Version: $parsed_email{'MIME-Version'}\n",
 756                                "Content-Type: $parsed_email{'Content-Type'};\n",
 757                                "Content-Transfer-Encoding: $parsed_email{'Content-Transfer-Encoding'}\n";
 758                delete($parsed_email{'MIME-Version'});
 759                delete($parsed_email{'Content-Type'});
 760                delete($parsed_email{'Content-Transfer-Encoding'});
 761        } elsif (file_has_nonascii($compose_filename)) {
 762                my $content_type = (delete($parsed_email{'Content-Type'}) or
 763                        "text/plain; charset=$compose_encoding");
 764                print $c2 "MIME-Version: 1.0\n",
 765                        "Content-Type: $content_type\n",
 766                        "Content-Transfer-Encoding: 8bit\n";
 767        }
 768        # Preserve unknown headers
 769        foreach my $key (keys %parsed_email) {
 770                next if $key eq 'body';
 771                print $c2 "$key: $parsed_email{$key}";
 772        }
 773
 774        if ($parsed_email{'body'}) {
 775                print $c2 "\n$parsed_email{'body'}\n";
 776                delete($parsed_email{'body'});
 777        } else {
 778                print __("Summary email is empty, skipping it\n");
 779                $compose = -1;
 780        }
 781
 782        close $c2;
 783
 784} elsif ($annotate) {
 785        do_edit(@files);
 786}
 787
 788sub ask {
 789        my ($prompt, %arg) = @_;
 790        my $valid_re = $arg{valid_re};
 791        my $default = $arg{default};
 792        my $confirm_only = $arg{confirm_only};
 793        my $resp;
 794        my $i = 0;
 795        return defined $default ? $default : undef
 796                unless defined $term->IN and defined fileno($term->IN) and
 797                       defined $term->OUT and defined fileno($term->OUT);
 798        while ($i++ < 10) {
 799                $resp = $term->readline($prompt);
 800                if (!defined $resp) { # EOF
 801                        print "\n";
 802                        return defined $default ? $default : undef;
 803                }
 804                if ($resp eq '' and defined $default) {
 805                        return $default;
 806                }
 807                if (!defined $valid_re or $resp =~ /$valid_re/) {
 808                        return $resp;
 809                }
 810                if ($confirm_only) {
 811                        my $yesno = $term->readline(
 812                                # TRANSLATORS: please keep [y/N] as is.
 813                                sprintf(__("Are you sure you want to use <%s> [y/N]? "), $resp));
 814                        if (defined $yesno && $yesno =~ /y/i) {
 815                                return $resp;
 816                        }
 817                }
 818        }
 819        return;
 820}
 821
 822sub parse_header_line {
 823        my $lines = shift;
 824        my $parsed_line = shift;
 825        my $addr_pat = join "|", qw(To Cc Bcc);
 826
 827        foreach (split(/\n/, $lines)) {
 828                if (/^($addr_pat):\s*(.+)$/i) {
 829                        $parsed_line->{$1} = [ parse_address_line($2) ];
 830                } elsif (/^([^:]*):\s*(.+)\s*$/i) {
 831                        $parsed_line->{$1} = $2;
 832                }
 833        }
 834}
 835
 836sub filter_body {
 837        my $c = shift;
 838        my $body = "";
 839        while (my $body_line = <$c>) {
 840                if ($body_line !~ m/^GIT:/) {
 841                        $body .= $body_line;
 842                }
 843        }
 844        return $body;
 845}
 846
 847
 848my %broken_encoding;
 849
 850sub file_declares_8bit_cte {
 851        my $fn = shift;
 852        open (my $fh, '<', $fn);
 853        while (my $line = <$fh>) {
 854                last if ($line =~ /^$/);
 855                return 1 if ($line =~ /^Content-Transfer-Encoding: .*8bit.*$/);
 856        }
 857        close $fh;
 858        return 0;
 859}
 860
 861foreach my $f (@files) {
 862        next unless (body_or_subject_has_nonascii($f)
 863                     && !file_declares_8bit_cte($f));
 864        $broken_encoding{$f} = 1;
 865}
 866
 867if (!defined $auto_8bit_encoding && scalar %broken_encoding) {
 868        print __("The following files are 8bit, but do not declare " .
 869                 "a Content-Transfer-Encoding.\n");
 870        foreach my $f (sort keys %broken_encoding) {
 871                print "    $f\n";
 872        }
 873        $auto_8bit_encoding = ask(__("Which 8bit encoding should I declare [UTF-8]? "),
 874                                  valid_re => qr/.{4}/, confirm_only => 1,
 875                                  default => "UTF-8");
 876}
 877
 878if (!$force) {
 879        for my $f (@files) {
 880                if (get_patch_subject($f) =~ /\Q*** SUBJECT HERE ***\E/) {
 881                        die sprintf(__("Refusing to send because the patch\n\t%s\n"
 882                                . "has the template subject '*** SUBJECT HERE ***'. "
 883                                . "Pass --force if you really want to send.\n"), $f);
 884                }
 885        }
 886}
 887
 888if (defined $sender) {
 889        $sender =~ s/^\s+|\s+$//g;
 890        ($sender) = expand_aliases($sender);
 891} else {
 892        $sender = $repoauthor || $repocommitter || '';
 893}
 894
 895# $sender could be an already sanitized address
 896# (e.g. sendemail.from could be manually sanitized by user).
 897# But it's a no-op to run sanitize_address on an already sanitized address.
 898$sender = sanitize_address($sender);
 899
 900my $to_whom = __("To whom should the emails be sent (if anyone)?");
 901my $prompting = 0;
 902if (!@initial_to && !defined $to_cmd) {
 903        my $to = ask("$to_whom ",
 904                     default => "",
 905                     valid_re => qr/\@.*\./, confirm_only => 1);
 906        push @initial_to, parse_address_line($to) if defined $to; # sanitized/validated later
 907        $prompting++;
 908}
 909
 910sub expand_aliases {
 911        return map { expand_one_alias($_) } @_;
 912}
 913
 914my %EXPANDED_ALIASES;
 915sub expand_one_alias {
 916        my $alias = shift;
 917        if ($EXPANDED_ALIASES{$alias}) {
 918                die sprintf(__("fatal: alias '%s' expands to itself\n"), $alias);
 919        }
 920        local $EXPANDED_ALIASES{$alias} = 1;
 921        return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
 922}
 923
 924@initial_to = process_address_list(@initial_to);
 925@initial_cc = process_address_list(@initial_cc);
 926@bcclist = process_address_list(@bcclist);
 927
 928if ($thread && !defined $initial_in_reply_to && $prompting) {
 929        $initial_in_reply_to = ask(
 930                __("Message-ID to be used as In-Reply-To for the first email (if any)? "),
 931                default => "",
 932                valid_re => qr/\@.*\./, confirm_only => 1);
 933}
 934if (defined $initial_in_reply_to) {
 935        $initial_in_reply_to =~ s/^\s*<?//;
 936        $initial_in_reply_to =~ s/>?\s*$//;
 937        $initial_in_reply_to = "<$initial_in_reply_to>" if $initial_in_reply_to ne '';
 938}
 939
 940if (defined $reply_to) {
 941        $reply_to =~ s/^\s+|\s+$//g;
 942        ($reply_to) = expand_aliases($reply_to);
 943        $reply_to = sanitize_address($reply_to);
 944}
 945
 946if (!defined $smtp_server) {
 947        my @sendmail_paths = qw( /usr/sbin/sendmail /usr/lib/sendmail );
 948        push @sendmail_paths, map {"$_/sendmail"} split /:/, $ENV{PATH};
 949        foreach (@sendmail_paths) {
 950                if (-x $_) {
 951                        $smtp_server = $_;
 952                        last;
 953                }
 954        }
 955        $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
 956}
 957
 958if ($compose && $compose > 0) {
 959        @files = ($compose_filename . ".final", @files);
 960}
 961
 962# Variables we set as part of the loop over files
 963our ($message_id, %mail, $subject, $in_reply_to, $references, $message,
 964        $needs_confirm, $message_num, $ask_default);
 965
 966sub extract_valid_address {
 967        my $address = shift;
 968        my $local_part_regexp = qr/[^<>"\s@]+/;
 969        my $domain_regexp = qr/[^.<>"\s@]+(?:\.[^.<>"\s@]+)+/;
 970
 971        # check for a local address:
 972        return $address if ($address =~ /^($local_part_regexp)$/);
 973
 974        $address =~ s/^\s*<(.*)>\s*$/$1/;
 975        if ($have_email_valid) {
 976                return scalar Email::Valid->address($address);
 977        }
 978
 979        # less robust/correct than the monster regexp in Email::Valid,
 980        # but still does a 99% job, and one less dependency
 981        return $1 if $address =~ /($local_part_regexp\@$domain_regexp)/;
 982        return;
 983}
 984
 985sub extract_valid_address_or_die {
 986        my $address = shift;
 987        $address = extract_valid_address($address);
 988        die sprintf(__("error: unable to extract a valid address from: %s\n"), $address)
 989                if !$address;
 990        return $address;
 991}
 992
 993sub validate_address {
 994        my $address = shift;
 995        while (!extract_valid_address($address)) {
 996                printf STDERR __("error: unable to extract a valid address from: %s\n"), $address;
 997                # TRANSLATORS: Make sure to include [q] [d] [e] in your
 998                # translation. The program will only accept English input
 999                # at this point.
1000                $_ = ask(__("What to do with this address? ([q]uit|[d]rop|[e]dit): "),
1001                        valid_re => qr/^(?:quit|q|drop|d|edit|e)/i,
1002                        default => 'q');
1003                if (/^d/i) {
1004                        return undef;
1005                } elsif (/^q/i) {
1006                        cleanup_compose_files();
1007                        exit(0);
1008                }
1009                $address = ask("$to_whom ",
1010                        default => "",
1011                        valid_re => qr/\@.*\./, confirm_only => 1);
1012        }
1013        return $address;
1014}
1015
1016sub validate_address_list {
1017        return (grep { defined $_ }
1018                map { validate_address($_) } @_);
1019}
1020
1021# Usually don't need to change anything below here.
1022
1023# we make a "fake" message id by taking the current number
1024# of seconds since the beginning of Unix time and tacking on
1025# a random number to the end, in case we are called quicker than
1026# 1 second since the last time we were called.
1027
1028# We'll setup a template for the message id, using the "from" address:
1029
1030my ($message_id_stamp, $message_id_serial);
1031sub make_message_id {
1032        my $uniq;
1033        if (!defined $message_id_stamp) {
1034                $message_id_stamp = strftime("%Y%m%d%H%M%S.$$", gmtime(time));
1035                $message_id_serial = 0;
1036        }
1037        $message_id_serial++;
1038        $uniq = "$message_id_stamp-$message_id_serial";
1039
1040        my $du_part;
1041        for ($sender, $repocommitter, $repoauthor) {
1042                $du_part = extract_valid_address(sanitize_address($_));
1043                last if (defined $du_part and $du_part ne '');
1044        }
1045        if (not defined $du_part or $du_part eq '') {
1046                require Sys::Hostname;
1047                $du_part = 'user@' . Sys::Hostname::hostname();
1048        }
1049        my $message_id_template = "<%s-%s>";
1050        $message_id = sprintf($message_id_template, $uniq, $du_part);
1051        #print "new message id = $message_id\n"; # Was useful for debugging
1052}
1053
1054
1055
1056$time = time - scalar $#files;
1057
1058sub unquote_rfc2047 {
1059        local ($_) = @_;
1060        my $charset;
1061        my $sep = qr/[ \t]+/;
1062        s{$re_encoded_word(?:$sep$re_encoded_word)*}{
1063                my @words = split $sep, $&;
1064                foreach (@words) {
1065                        m/$re_encoded_word/;
1066                        $charset = $1;
1067                        my $encoding = $2;
1068                        my $text = $3;
1069                        if ($encoding eq 'q' || $encoding eq 'Q') {
1070                                $_ = $text;
1071                                s/_/ /g;
1072                                s/=([0-9A-F]{2})/chr(hex($1))/egi;
1073                        } else {
1074                                # other encodings not supported yet
1075                        }
1076                }
1077                join '', @words;
1078        }eg;
1079        return wantarray ? ($_, $charset) : $_;
1080}
1081
1082sub quote_rfc2047 {
1083        local $_ = shift;
1084        my $encoding = shift || 'UTF-8';
1085        s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
1086        s/(.*)/=\?$encoding\?q\?$1\?=/;
1087        return $_;
1088}
1089
1090sub is_rfc2047_quoted {
1091        my $s = shift;
1092        length($s) <= 75 &&
1093        $s =~ m/^(?:"[[:ascii:]]*"|$re_encoded_word)$/o;
1094}
1095
1096sub subject_needs_rfc2047_quoting {
1097        my $s = shift;
1098
1099        return ($s =~ /[^[:ascii:]]/) || ($s =~ /=\?/);
1100}
1101
1102sub quote_subject {
1103        local $subject = shift;
1104        my $encoding = shift || 'UTF-8';
1105
1106        if (subject_needs_rfc2047_quoting($subject)) {
1107                return quote_rfc2047($subject, $encoding);
1108        }
1109        return $subject;
1110}
1111
1112# use the simplest quoting being able to handle the recipient
1113sub sanitize_address {
1114        my ($recipient) = @_;
1115
1116        # remove garbage after email address
1117        $recipient =~ s/(.*>).*$/$1/;
1118
1119        my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
1120
1121        if (not $recipient_name) {
1122                return $recipient;
1123        }
1124
1125        # if recipient_name is already quoted, do nothing
1126        if (is_rfc2047_quoted($recipient_name)) {
1127                return $recipient;
1128        }
1129
1130        # remove non-escaped quotes
1131        $recipient_name =~ s/(^|[^\\])"/$1/g;
1132
1133        # rfc2047 is needed if a non-ascii char is included
1134        if ($recipient_name =~ /[^[:ascii:]]/) {
1135                $recipient_name = quote_rfc2047($recipient_name);
1136        }
1137
1138        # double quotes are needed if specials or CTLs are included
1139        elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
1140                $recipient_name =~ s/([\\\r])/\\$1/g;
1141                $recipient_name = qq["$recipient_name"];
1142        }
1143
1144        return "$recipient_name $recipient_addr";
1145
1146}
1147
1148sub strip_garbage_one_address {
1149        my ($addr) = @_;
1150        chomp $addr;
1151        if ($addr =~ /^(("[^"]*"|[^"<]*)? *<[^>]*>).*/) {
1152                # "Foo Bar" <foobar@example.com> [possibly garbage here]
1153                # Foo Bar <foobar@example.com> [possibly garbage here]
1154                return $1;
1155        }
1156        if ($addr =~ /^(<[^>]*>).*/) {
1157                # <foo@example.com> [possibly garbage here]
1158                # if garbage contains other addresses, they are ignored.
1159                return $1;
1160        }
1161        if ($addr =~ /^([^"#,\s]*)/) {
1162                # address without quoting: remove anything after the address
1163                return $1;
1164        }
1165        return $addr;
1166}
1167
1168sub sanitize_address_list {
1169        return (map { sanitize_address($_) } @_);
1170}
1171
1172sub process_address_list {
1173        my @addr_list = map { parse_address_line($_) } @_;
1174        @addr_list = expand_aliases(@addr_list);
1175        @addr_list = sanitize_address_list(@addr_list);
1176        @addr_list = validate_address_list(@addr_list);
1177        return @addr_list;
1178}
1179
1180# Returns the local Fully Qualified Domain Name (FQDN) if available.
1181#
1182# Tightly configured MTAa require that a caller sends a real DNS
1183# domain name that corresponds the IP address in the HELO/EHLO
1184# handshake. This is used to verify the connection and prevent
1185# spammers from trying to hide their identity. If the DNS and IP don't
1186# match, the receiveing MTA may deny the connection.
1187#
1188# Here is a deny example of Net::SMTP with the default "localhost.localdomain"
1189#
1190# Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
1191# Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
1192#
1193# This maildomain*() code is based on ideas in Perl library Test::Reporter
1194# /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
1195
1196sub valid_fqdn {
1197        my $domain = shift;
1198        return defined $domain && !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
1199}
1200
1201sub maildomain_net {
1202        my $maildomain;
1203
1204        my $domain = Net::Domain::domainname();
1205        $maildomain = $domain if valid_fqdn($domain);
1206
1207        return $maildomain;
1208}
1209
1210sub maildomain_mta {
1211        my $maildomain;
1212
1213        for my $host (qw(mailhost localhost)) {
1214                my $smtp = Net::SMTP->new($host);
1215                if (defined $smtp) {
1216                        my $domain = $smtp->domain;
1217                        $smtp->quit;
1218
1219                        $maildomain = $domain if valid_fqdn($domain);
1220
1221                        last if $maildomain;
1222                }
1223        }
1224
1225        return $maildomain;
1226}
1227
1228sub maildomain {
1229        return maildomain_net() || maildomain_mta() || 'localhost.localdomain';
1230}
1231
1232sub smtp_host_string {
1233        if (defined $smtp_server_port) {
1234                return "$smtp_server:$smtp_server_port";
1235        } else {
1236                return $smtp_server;
1237        }
1238}
1239
1240# Returns 1 if authentication succeeded or was not necessary
1241# (smtp_user was not specified), and 0 otherwise.
1242
1243sub smtp_auth_maybe {
1244        if (!defined $smtp_authuser || $auth) {
1245                return 1;
1246        }
1247
1248        # Workaround AUTH PLAIN/LOGIN interaction defect
1249        # with Authen::SASL::Cyrus
1250        eval {
1251                require Authen::SASL;
1252                Authen::SASL->import(qw(Perl));
1253        };
1254
1255        # Check mechanism naming as defined in:
1256        # https://tools.ietf.org/html/rfc4422#page-8
1257        if ($smtp_auth && $smtp_auth !~ /^(\b[A-Z0-9-_]{1,20}\s*)*$/) {
1258                die "invalid smtp auth: '${smtp_auth}'";
1259        }
1260
1261        # TODO: Authentication may fail not because credentials were
1262        # invalid but due to other reasons, in which we should not
1263        # reject credentials.
1264        $auth = Git::credential({
1265                'protocol' => 'smtp',
1266                'host' => smtp_host_string(),
1267                'username' => $smtp_authuser,
1268                # if there's no password, "git credential fill" will
1269                # give us one, otherwise it'll just pass this one.
1270                'password' => $smtp_authpass
1271        }, sub {
1272                my $cred = shift;
1273
1274                if ($smtp_auth) {
1275                        my $sasl = Authen::SASL->new(
1276                                mechanism => $smtp_auth,
1277                                callback => {
1278                                        user => $cred->{'username'},
1279                                        pass => $cred->{'password'},
1280                                        authname => $cred->{'username'},
1281                                }
1282                        );
1283
1284                        return !!$smtp->auth($sasl);
1285                }
1286
1287                return !!$smtp->auth($cred->{'username'}, $cred->{'password'});
1288        });
1289
1290        return $auth;
1291}
1292
1293sub ssl_verify_params {
1294        eval {
1295                require IO::Socket::SSL;
1296                IO::Socket::SSL->import(qw/SSL_VERIFY_PEER SSL_VERIFY_NONE/);
1297        };
1298        if ($@) {
1299                print STDERR "Not using SSL_VERIFY_PEER due to out-of-date IO::Socket::SSL.\n";
1300                return;
1301        }
1302
1303        if (!defined $smtp_ssl_cert_path) {
1304                # use the OpenSSL defaults
1305                return (SSL_verify_mode => SSL_VERIFY_PEER());
1306        }
1307
1308        if ($smtp_ssl_cert_path eq "") {
1309                return (SSL_verify_mode => SSL_VERIFY_NONE());
1310        } elsif (-d $smtp_ssl_cert_path) {
1311                return (SSL_verify_mode => SSL_VERIFY_PEER(),
1312                        SSL_ca_path => $smtp_ssl_cert_path);
1313        } elsif (-f $smtp_ssl_cert_path) {
1314                return (SSL_verify_mode => SSL_VERIFY_PEER(),
1315                        SSL_ca_file => $smtp_ssl_cert_path);
1316        } else {
1317                die sprintf(__("CA path \"%s\" does not exist"), $smtp_ssl_cert_path);
1318        }
1319}
1320
1321sub file_name_is_absolute {
1322        my ($path) = @_;
1323
1324        # msys does not grok DOS drive-prefixes
1325        if ($^O eq 'msys') {
1326                return ($path =~ m#^/# || $path =~ m#^[a-zA-Z]\:#)
1327        }
1328
1329        require File::Spec::Functions;
1330        return File::Spec::Functions::file_name_is_absolute($path);
1331}
1332
1333# Returns 1 if the message was sent, and 0 otherwise.
1334# In actuality, the whole program dies when there
1335# is an error sending a message.
1336
1337sub send_message {
1338        my @recipients = unique_email_list(@to);
1339        @cc = (grep { my $cc = extract_valid_address_or_die($_);
1340                      not grep { $cc eq $_ || $_ =~ /<\Q${cc}\E>$/ } @recipients
1341                    }
1342               @cc);
1343        my $to = join (",\n\t", @recipients);
1344        @recipients = unique_email_list(@recipients,@cc,@bcclist);
1345        @recipients = (map { extract_valid_address_or_die($_) } @recipients);
1346        my $date = format_2822_time($time++);
1347        my $gitversion = '@@GIT_VERSION@@';
1348        if ($gitversion =~ m/..GIT_VERSION../) {
1349            $gitversion = Git::version();
1350        }
1351
1352        my $cc = join(",\n\t", unique_email_list(@cc));
1353        my $ccline = "";
1354        if ($cc ne '') {
1355                $ccline = "\nCc: $cc";
1356        }
1357        make_message_id() unless defined($message_id);
1358
1359        my $header = "From: $sender
1360To: $to${ccline}
1361Subject: $subject
1362Date: $date
1363Message-Id: $message_id
1364";
1365        if ($use_xmailer) {
1366                $header .= "X-Mailer: git-send-email $gitversion\n";
1367        }
1368        if ($in_reply_to) {
1369
1370                $header .= "In-Reply-To: $in_reply_to\n";
1371                $header .= "References: $references\n";
1372        }
1373        if ($reply_to) {
1374                $header .= "Reply-To: $reply_to\n";
1375        }
1376        if (@xh) {
1377                $header .= join("\n", @xh) . "\n";
1378        }
1379
1380        my @sendmail_parameters = ('-i', @recipients);
1381        my $raw_from = $sender;
1382        if (defined $envelope_sender && $envelope_sender ne "auto") {
1383                $raw_from = $envelope_sender;
1384        }
1385        $raw_from = extract_valid_address($raw_from);
1386        unshift (@sendmail_parameters,
1387                        '-f', $raw_from) if(defined $envelope_sender);
1388
1389        if ($needs_confirm && !$dry_run) {
1390                print "\n$header\n";
1391                if ($needs_confirm eq "inform") {
1392                        $confirm_unconfigured = 0; # squelch this message for the rest of this run
1393                        $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
1394                        print __ <<EOF ;
1395    The Cc list above has been expanded by additional
1396    addresses found in the patch commit message. By default
1397    send-email prompts before sending whenever this occurs.
1398    This behavior is controlled by the sendemail.confirm
1399    configuration setting.
1400
1401    For additional information, run 'git send-email --help'.
1402    To retain the current behavior, but squelch this message,
1403    run 'git config --global sendemail.confirm auto'.
1404
1405EOF
1406                }
1407                # TRANSLATORS: Make sure to include [y] [n] [q] [a] in your
1408                # translation. The program will only accept English input
1409                # at this point.
1410                $_ = ask(__("Send this email? ([y]es|[n]o|[q]uit|[a]ll): "),
1411                         valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
1412                         default => $ask_default);
1413                die __("Send this email reply required") unless defined $_;
1414                if (/^n/i) {
1415                        return 0;
1416                } elsif (/^q/i) {
1417                        cleanup_compose_files();
1418                        exit(0);
1419                } elsif (/^a/i) {
1420                        $confirm = 'never';
1421                }
1422        }
1423
1424        unshift (@sendmail_parameters, @smtp_server_options);
1425
1426        if ($dry_run) {
1427                # We don't want to send the email.
1428        } elsif (file_name_is_absolute($smtp_server)) {
1429                my $pid = open my $sm, '|-';
1430                defined $pid or die $!;
1431                if (!$pid) {
1432                        exec($smtp_server, @sendmail_parameters) or die $!;
1433                }
1434                print $sm "$header\n$message";
1435                close $sm or die $!;
1436        } else {
1437
1438                if (!defined $smtp_server) {
1439                        die __("The required SMTP server is not properly defined.")
1440                }
1441
1442                require Net::SMTP;
1443                my $use_net_smtp_ssl = version->parse($Net::SMTP::VERSION) < version->parse("2.34");
1444                $smtp_domain ||= maildomain();
1445
1446                if ($smtp_encryption eq 'ssl') {
1447                        $smtp_server_port ||= 465; # ssmtp
1448                        require IO::Socket::SSL;
1449
1450                        # Suppress "variable accessed once" warning.
1451                        {
1452                                no warnings 'once';
1453                                $IO::Socket::SSL::DEBUG = 1;
1454                        }
1455
1456                        # Net::SMTP::SSL->new() does not forward any SSL options
1457                        IO::Socket::SSL::set_client_defaults(
1458                                ssl_verify_params());
1459
1460                        if ($use_net_smtp_ssl) {
1461                                require Net::SMTP::SSL;
1462                                $smtp ||= Net::SMTP::SSL->new($smtp_server,
1463                                                              Hello => $smtp_domain,
1464                                                              Port => $smtp_server_port,
1465                                                              Debug => $debug_net_smtp);
1466                        }
1467                        else {
1468                                $smtp ||= Net::SMTP->new($smtp_server,
1469                                                         Hello => $smtp_domain,
1470                                                         Port => $smtp_server_port,
1471                                                         Debug => $debug_net_smtp,
1472                                                         SSL => 1);
1473                        }
1474                }
1475                else {
1476                        $smtp_server_port ||= 25;
1477                        $smtp ||= Net::SMTP->new($smtp_server,
1478                                                 Hello => $smtp_domain,
1479                                                 Debug => $debug_net_smtp,
1480                                                 Port => $smtp_server_port);
1481                        if ($smtp_encryption eq 'tls' && $smtp) {
1482                                if ($use_net_smtp_ssl) {
1483                                        $smtp->command('STARTTLS');
1484                                        $smtp->response();
1485                                        if ($smtp->code != 220) {
1486                                                die sprintf(__("Server does not support STARTTLS! %s"), $smtp->message);
1487                                        }
1488                                        require Net::SMTP::SSL;
1489                                        $smtp = Net::SMTP::SSL->start_SSL($smtp,
1490                                                                          ssl_verify_params())
1491                                                or die sprintf(__("STARTTLS failed! %s"), IO::Socket::SSL::errstr());
1492                                }
1493                                else {
1494                                        $smtp->starttls(ssl_verify_params())
1495                                                or die sprintf(__("STARTTLS failed! %s"), IO::Socket::SSL::errstr());
1496                                }
1497                                $smtp_encryption = '';
1498                                # Send EHLO again to receive fresh
1499                                # supported commands
1500                                $smtp->hello($smtp_domain);
1501                        }
1502                }
1503
1504                if (!$smtp) {
1505                        die __("Unable to initialize SMTP properly. Check config and use --smtp-debug."),
1506                            " VALUES: server=$smtp_server ",
1507                            "encryption=$smtp_encryption ",
1508                            "hello=$smtp_domain",
1509                            defined $smtp_server_port ? " port=$smtp_server_port" : "";
1510                }
1511
1512                smtp_auth_maybe or die $smtp->message;
1513
1514                $smtp->mail( $raw_from ) or die $smtp->message;
1515                $smtp->to( @recipients ) or die $smtp->message;
1516                $smtp->data or die $smtp->message;
1517                $smtp->datasend("$header\n") or die $smtp->message;
1518                my @lines = split /^/, $message;
1519                foreach my $line (@lines) {
1520                        $smtp->datasend("$line") or die $smtp->message;
1521                }
1522                $smtp->dataend() or die $smtp->message;
1523                $smtp->code =~ /250|200/ or die sprintf(__("Failed to send %s\n"), $subject).$smtp->message;
1524        }
1525        if ($quiet) {
1526                printf($dry_run ? __("Dry-Sent %s\n") : __("Sent %s\n"), $subject);
1527        } else {
1528                print($dry_run ? __("Dry-OK. Log says:\n") : __("OK. Log says:\n"));
1529                if (!file_name_is_absolute($smtp_server)) {
1530                        print "Server: $smtp_server\n";
1531                        print "MAIL FROM:<$raw_from>\n";
1532                        foreach my $entry (@recipients) {
1533                            print "RCPT TO:<$entry>\n";
1534                        }
1535                } else {
1536                        print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1537                }
1538                print $header, "\n";
1539                if ($smtp) {
1540                        print __("Result: "), $smtp->code, ' ',
1541                                ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1542                } else {
1543                        print __("Result: OK\n");
1544                }
1545        }
1546
1547        return 1;
1548}
1549
1550$in_reply_to = $initial_in_reply_to;
1551$references = $initial_in_reply_to || '';
1552$subject = $initial_subject;
1553$message_num = 0;
1554
1555foreach my $t (@files) {
1556        open my $fh, "<", $t or die sprintf(__("can't open file %s"), $t);
1557
1558        my $author = undef;
1559        my $sauthor = undef;
1560        my $author_encoding;
1561        my $has_content_type;
1562        my $body_encoding;
1563        my $xfer_encoding;
1564        my $has_mime_version;
1565        @to = ();
1566        @cc = ();
1567        @xh = ();
1568        my $input_format = undef;
1569        my @header = ();
1570        $message = "";
1571        $message_num++;
1572        # First unfold multiline header fields
1573        while(<$fh>) {
1574                last if /^\s*$/;
1575                if (/^\s+\S/ and @header) {
1576                        chomp($header[$#header]);
1577                        s/^\s+/ /;
1578                        $header[$#header] .= $_;
1579            } else {
1580                        push(@header, $_);
1581                }
1582        }
1583        # Now parse the header
1584        foreach(@header) {
1585                if (/^From /) {
1586                        $input_format = 'mbox';
1587                        next;
1588                }
1589                chomp;
1590                if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1591                        $input_format = 'mbox';
1592                }
1593
1594                if (defined $input_format && $input_format eq 'mbox') {
1595                        if (/^Subject:\s+(.*)$/i) {
1596                                $subject = $1;
1597                        }
1598                        elsif (/^From:\s+(.*)$/i) {
1599                                ($author, $author_encoding) = unquote_rfc2047($1);
1600                                $sauthor = sanitize_address($author);
1601                                next if $suppress_cc{'author'};
1602                                next if $suppress_cc{'self'} and $sauthor eq $sender;
1603                                printf(__("(mbox) Adding cc: %s from line '%s'\n"),
1604                                        $1, $_) unless $quiet;
1605                                push @cc, $1;
1606                        }
1607                        elsif (/^To:\s+(.*)$/i) {
1608                                foreach my $addr (parse_address_line($1)) {
1609                                        printf(__("(mbox) Adding to: %s from line '%s'\n"),
1610                                                $addr, $_) unless $quiet;
1611                                        push @to, $addr;
1612                                }
1613                        }
1614                        elsif (/^Cc:\s+(.*)$/i) {
1615                                foreach my $addr (parse_address_line($1)) {
1616                                        my $qaddr = unquote_rfc2047($addr);
1617                                        my $saddr = sanitize_address($qaddr);
1618                                        if ($saddr eq $sender) {
1619                                                next if ($suppress_cc{'self'});
1620                                        } else {
1621                                                next if ($suppress_cc{'cc'});
1622                                        }
1623                                        printf(__("(mbox) Adding cc: %s from line '%s'\n"),
1624                                                $addr, $_) unless $quiet;
1625                                        push @cc, $addr;
1626                                }
1627                        }
1628                        elsif (/^Content-type:/i) {
1629                                $has_content_type = 1;
1630                                if (/charset="?([^ "]+)/) {
1631                                        $body_encoding = $1;
1632                                }
1633                                push @xh, $_;
1634                        }
1635                        elsif (/^MIME-Version/i) {
1636                                $has_mime_version = 1;
1637                                push @xh, $_;
1638                        }
1639                        elsif (/^Message-Id: (.*)/i) {
1640                                $message_id = $1;
1641                        }
1642                        elsif (/^Content-Transfer-Encoding: (.*)/i) {
1643                                $xfer_encoding = $1 if not defined $xfer_encoding;
1644                        }
1645                        elsif (!/^Date:\s/i && /^[-A-Za-z]+:\s+\S/) {
1646                                push @xh, $_;
1647                        }
1648
1649                } else {
1650                        # In the traditional
1651                        # "send lots of email" format,
1652                        # line 1 = cc
1653                        # line 2 = subject
1654                        # So let's support that, too.
1655                        $input_format = 'lots';
1656                        if (@cc == 0 && !$suppress_cc{'cc'}) {
1657                                printf(__("(non-mbox) Adding cc: %s from line '%s'\n"),
1658                                        $_, $_) unless $quiet;
1659                                push @cc, $_;
1660                        } elsif (!defined $subject) {
1661                                $subject = $_;
1662                        }
1663                }
1664        }
1665        # Now parse the message body
1666        while(<$fh>) {
1667                $message .=  $_;
1668                if (/^(Signed-off-by|Cc): (.*)/i) {
1669                        chomp;
1670                        my ($what, $c) = ($1, $2);
1671                        # strip garbage for the address we'll use:
1672                        $c = strip_garbage_one_address($c);
1673                        # sanitize a bit more to decide whether to suppress the address:
1674                        my $sc = sanitize_address($c);
1675                        if ($sc eq $sender) {
1676                                next if ($suppress_cc{'self'});
1677                        } else {
1678                                next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1679                                next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1680                        }
1681                        push @cc, $c;
1682                        printf(__("(body) Adding cc: %s from line '%s'\n"),
1683                                $c, $_) unless $quiet;
1684                }
1685        }
1686        close $fh;
1687
1688        push @to, recipients_cmd("to-cmd", "to", $to_cmd, $t)
1689                if defined $to_cmd;
1690        push @cc, recipients_cmd("cc-cmd", "cc", $cc_cmd, $t)
1691                if defined $cc_cmd && !$suppress_cc{'cccmd'};
1692
1693        if ($broken_encoding{$t} && !$has_content_type) {
1694                $xfer_encoding = '8bit' if not defined $xfer_encoding;
1695                $has_content_type = 1;
1696                push @xh, "Content-Type: text/plain; charset=$auto_8bit_encoding";
1697                $body_encoding = $auto_8bit_encoding;
1698        }
1699
1700        if ($broken_encoding{$t} && !is_rfc2047_quoted($subject)) {
1701                $subject = quote_subject($subject, $auto_8bit_encoding);
1702        }
1703
1704        if (defined $sauthor and $sauthor ne $sender) {
1705                $message = "From: $author\n\n$message";
1706                if (defined $author_encoding) {
1707                        if ($has_content_type) {
1708                                if ($body_encoding eq $author_encoding) {
1709                                        # ok, we already have the right encoding
1710                                }
1711                                else {
1712                                        # uh oh, we should re-encode
1713                                }
1714                        }
1715                        else {
1716                                $xfer_encoding = '8bit' if not defined $xfer_encoding;
1717                                $has_content_type = 1;
1718                                push @xh,
1719                                  "Content-Type: text/plain; charset=$author_encoding";
1720                        }
1721                }
1722        }
1723        if (defined $target_xfer_encoding) {
1724                $xfer_encoding = '8bit' if not defined $xfer_encoding;
1725                $message = apply_transfer_encoding(
1726                        $message, $xfer_encoding, $target_xfer_encoding);
1727                $xfer_encoding = $target_xfer_encoding;
1728        }
1729        if (defined $xfer_encoding) {
1730                push @xh, "Content-Transfer-Encoding: $xfer_encoding";
1731        }
1732        if (defined $xfer_encoding or $has_content_type) {
1733                unshift @xh, 'MIME-Version: 1.0' unless $has_mime_version;
1734        }
1735
1736        $needs_confirm = (
1737                $confirm eq "always" or
1738                ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1739                ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1740        $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1741
1742        @to = process_address_list(@to);
1743        @cc = process_address_list(@cc);
1744
1745        @to = (@initial_to, @to);
1746        @cc = (@initial_cc, @cc);
1747
1748        if ($message_num == 1) {
1749                if (defined $cover_cc and $cover_cc) {
1750                        @initial_cc = @cc;
1751                }
1752                if (defined $cover_to and $cover_to) {
1753                        @initial_to = @to;
1754                }
1755        }
1756
1757        my $message_was_sent = send_message();
1758
1759        # set up for the next message
1760        if ($thread && $message_was_sent &&
1761                ($chain_reply_to || !defined $in_reply_to || length($in_reply_to) == 0 ||
1762                $message_num == 1)) {
1763                $in_reply_to = $message_id;
1764                if (length $references > 0) {
1765                        $references .= "\n $message_id";
1766                } else {
1767                        $references = "$message_id";
1768                }
1769        }
1770        $message_id = undef;
1771        $num_sent++;
1772        if (defined $batch_size && $num_sent == $batch_size) {
1773                $num_sent = 0;
1774                $smtp->quit if defined $smtp;
1775                undef $smtp;
1776                undef $auth;
1777                sleep($relogin_delay) if defined $relogin_delay;
1778        }
1779}
1780
1781# Execute a command (e.g. $to_cmd) to get a list of email addresses
1782# and return a results array
1783sub recipients_cmd {
1784        my ($prefix, $what, $cmd, $file) = @_;
1785
1786        my @addresses = ();
1787        open my $fh, "-|", "$cmd \Q$file\E"
1788            or die sprintf(__("(%s) Could not execute '%s'"), $prefix, $cmd);
1789        while (my $address = <$fh>) {
1790                $address =~ s/^\s*//g;
1791                $address =~ s/\s*$//g;
1792                $address = sanitize_address($address);
1793                next if ($address eq $sender and $suppress_cc{'self'});
1794                push @addresses, $address;
1795                printf(__("(%s) Adding %s: %s from: '%s'\n"),
1796                       $prefix, $what, $address, $cmd) unless $quiet;
1797                }
1798        close $fh
1799            or die sprintf(__("(%s) failed to close pipe to '%s'"), $prefix, $cmd);
1800        return @addresses;
1801}
1802
1803cleanup_compose_files();
1804
1805sub cleanup_compose_files {
1806        unlink($compose_filename, $compose_filename . ".final") if $compose;
1807}
1808
1809$smtp->quit if $smtp;
1810
1811sub apply_transfer_encoding {
1812        my $message = shift;
1813        my $from = shift;
1814        my $to = shift;
1815
1816        return $message if ($from eq $to and $from ne '7bit');
1817
1818        require MIME::QuotedPrint;
1819        require MIME::Base64;
1820
1821        $message = MIME::QuotedPrint::decode($message)
1822                if ($from eq 'quoted-printable');
1823        $message = MIME::Base64::decode($message)
1824                if ($from eq 'base64');
1825
1826        die __("cannot send message as 7bit")
1827                if ($to eq '7bit' and $message =~ /[^[:ascii:]]/);
1828        return $message
1829                if ($to eq '7bit' or $to eq '8bit');
1830        return MIME::QuotedPrint::encode($message, "\n", 0)
1831                if ($to eq 'quoted-printable');
1832        return MIME::Base64::encode($message, "\n")
1833                if ($to eq 'base64');
1834        die __("invalid transfer encoding");
1835}
1836
1837sub unique_email_list {
1838        my %seen;
1839        my @emails;
1840
1841        foreach my $entry (@_) {
1842                my $clean = extract_valid_address_or_die($entry);
1843                $seen{$clean} ||= 0;
1844                next if $seen{$clean}++;
1845                push @emails, $entry;
1846        }
1847        return @emails;
1848}
1849
1850sub validate_patch {
1851        my $fn = shift;
1852
1853        if ($repo) {
1854                my $validate_hook = catfile(catdir($repo->repo_path(), 'hooks'),
1855                                            'sendemail-validate');
1856                my $hook_error;
1857                if (-x $validate_hook) {
1858                        my $target = abs_path($fn);
1859                        # The hook needs a correct cwd and GIT_DIR.
1860                        my $cwd_save = cwd();
1861                        chdir($repo->wc_path() or $repo->repo_path())
1862                                or die("chdir: $!");
1863                        local $ENV{"GIT_DIR"} = $repo->repo_path();
1864                        $hook_error = "rejected by sendemail-validate hook"
1865                                if system($validate_hook, $target);
1866                        chdir($cwd_save) or die("chdir: $!");
1867                }
1868                return $hook_error if $hook_error;
1869        }
1870
1871        open(my $fh, '<', $fn)
1872                or die sprintf(__("unable to open %s: %s\n"), $fn, $!);
1873        while (my $line = <$fh>) {
1874                if (length($line) > 998) {
1875                        return sprintf(__("%s: patch contains a line longer than 998 characters"), $.);
1876                }
1877        }
1878        return;
1879}
1880
1881sub handle_backup {
1882        my ($last, $lastlen, $file, $known_suffix) = @_;
1883        my ($suffix, $skip);
1884
1885        $skip = 0;
1886        if (defined $last &&
1887            ($lastlen < length($file)) &&
1888            (substr($file, 0, $lastlen) eq $last) &&
1889            ($suffix = substr($file, $lastlen)) !~ /^[a-z0-9]/i) {
1890                if (defined $known_suffix && $suffix eq $known_suffix) {
1891                        printf(__("Skipping %s with backup suffix '%s'.\n"), $file, $known_suffix);
1892                        $skip = 1;
1893                } else {
1894                        # TRANSLATORS: please keep "[y|N]" as is.
1895                        my $answer = ask(sprintf(__("Do you really want to send %s? [y|N]: "), $file),
1896                                         valid_re => qr/^(?:y|n)/i,
1897                                         default => 'n');
1898                        $skip = ($answer ne 'y');
1899                        if ($skip) {
1900                                $known_suffix = $suffix;
1901                        }
1902                }
1903        }
1904        return ($skip, $known_suffix);
1905}
1906
1907sub handle_backup_files {
1908        my @file = @_;
1909        my ($last, $lastlen, $known_suffix, $skip, @result);
1910        for my $file (@file) {
1911                ($skip, $known_suffix) = handle_backup($last, $lastlen,
1912                                                       $file, $known_suffix);
1913                push @result, $file unless $skip;
1914                $last = $file;
1915                $lastlen = length($file);
1916        }
1917        return @result;
1918}
1919
1920sub file_has_nonascii {
1921        my $fn = shift;
1922        open(my $fh, '<', $fn)
1923                or die sprintf(__("unable to open %s: %s\n"), $fn, $!);
1924        while (my $line = <$fh>) {
1925                return 1 if $line =~ /[^[:ascii:]]/;
1926        }
1927        return 0;
1928}
1929
1930sub body_or_subject_has_nonascii {
1931        my $fn = shift;
1932        open(my $fh, '<', $fn)
1933                or die sprintf(__("unable to open %s: %s\n"), $fn, $!);
1934        while (my $line = <$fh>) {
1935                last if $line =~ /^$/;
1936                return 1 if $line =~ /^Subject.*[^[:ascii:]]/;
1937        }
1938        while (my $line = <$fh>) {
1939                return 1 if $line =~ /[^[:ascii:]]/;
1940        }
1941        return 0;
1942}