perlmail-sendmail

   1 #! /usr/bin/perl
   2 #
   3 # $Id$
   4
   5 use vars qw($VERSION);
   6 $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
   7 use strict;
   8 use warnings;
   9
  10 require Getopt::Long;
  11 use POSIX qw(WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG);
  12 require Mail::Header;
  13 require Mail::Address;
  14 require File::Basename;
  15 require Mail::Alias;
  16
  17 my $sendmail_orig=(-x ($_="/usr/sbin/sendmail-orig") ? $_ : "/usr/sbin/sendmail");
  18 my $HOME="/home/short";
  19 # Mail-Alias-1.12 defaults to "/etc/mail/aliases" which does not exist on RedHat sendmail-8.12.5-7
  20 # Mail-Alias-1.12 will clutter $_ !
  21 my @addr_addon=(Mail::Alias->new("/etc/aliases")->exists("sentout") ? ("sentout") : ());
  22 my $opt_F;
  23 sub FromAddress
  24 {
  25 my($rcpt,$iserror)=@_;
  26
  27         return Mail::Address->new(
  28                         (defined $opt_F ? $opt_F : "Jan Kratochvil"),
  29                         (!$iserror ? 'rcpt' : 'rcpterr')
  30                                         .'-'
  31                                         .(defined($rcpt->user()) ? $rcpt->user() : "NOUSER")
  32                                         .".AT."
  33                                         .(defined($rcpt->host()) ? $rcpt->host() : "LOCAL")
  34                                         .'@jankratochvil.net',
  35                         );
  36 }
  37
  38 # RedHat sendmail-8.9.3-20/src/conf.c/HdrInfo[]/\Q/* destination fields */\E
  39 # FIXME: Recognize "Resent-$_" headers for -t but when we are in 'resent' mode?
  40 my @h_rcpt=(    # case in-sensitive!
  41                 "To",
  42                 "Cc",
  43                 "Bcc",
  44                 "Apparently-To",
  45                 );
  46
  47 # ordering matters; first header found is substituted
  48 # last header is subsituted if no one is found
  49 my @h_from=(
  50                 "Resent-From",
  51                 "From",
  52                 );
  53
  54
  55 # FIXME: modularized unification with 'lacemail-accept'
  56 # BEGIN lacemail-accept
  57 our %muttrc_pending=();
  58 sub muttrc
  59 {
  60 my($muttrc)=@_;
  61
  62         $muttrc||="$HOME/.muttrc";
  63         $muttrc=~s/^\~/$HOME/;
  64         do { warn "Looping muttrc, ignoring: $muttrc"; return (); } if $muttrc_pending{$muttrc};
  65         local $muttrc_pending{$muttrc}=1;
  66         local *MUTTRC;
  67         open MUTTRC,$muttrc or do { warn "open \"$muttrc\": $!"; return (); };
  68         local $/="\n";
  69         local $_;
  70         my @r=();
  71         # far emulation mutt/init.c/mutt_parse_rc_line()
  72         while (<MUTTRC>) {
  73                 s/^[\s;]*//s;
  74                 s/[#;].*$//s;
  75                 s/\s*$//s;
  76                 next if !/^(\S+)\s*/s;
  77                 if ($1 eq "source") {
  78                         $_=$';
  79                         do { warn "Wrong 'source' parameters at $muttrc:$.: $_"; next; } if !/^\S+$/;
  80                         push @r,muttrc($_);
  81                         next;
  82                         }
  83                 push @r,$_;
  84                 }
  85         close MUTTRC or warn "close \"$muttrc\": $!";
  86         return wantarray() ? @r : join("",map("$_\n",@r));
  87 }
  88
  89 my %mutteval_charmap=(          # WARNING: Don't use "" or "0" here, see below for "|| warn"!
  90                 '\\'=>"\\",
  91                 'r'=>"\r",
  92                 'n'=>"\n",
  93                 't'=>"\t",
  94                 'f'=>"\f",
  95                 'e'=>"\e",
  96                 );
  97 # mutt/init.c/mutt_extract_token()
  98 sub mutteval
  99 {
 100         local $_=$_[0];
 101         return $_ if !s/^"//;
 102         do { warn "Missing trailing quote in: $_"; return $_; } if !s/"$//;
 103         s/\\(.)/$mutteval_charmap{$1} || warn "Undefined '\\$1' sequence in: $_";/ges;
 104         return $_;
 105 }
 106
 107 sub muttrc_get
 108 {
 109 my(@headers)=@_;
 110
 111         my @r=map({ (ref $_ ? $_ : qr/^\s*set\s+\Q$_\E\s*=\s*(.*?)\s*$/si); } @headers);
 112         my %r=map(($_=>undef()),@r);
 113         for (muttrc()) {
 114                 for my $ritem (@r) {
 115                         /$ritem/si or next;
 116                         $r{$ritem}=mutteval $1;
 117                         }
 118                 }
 119         for my $var (grep { !defined($r{$_}) } @r) {
 120                 warn "Variable '$var' not found in muttrc";
 121                 return undef();
 122                 }
 123         return wantarray() ? %r : $r{$r[0]};
 124 }
 125 # END lacemail-accept
 126
 127
 128 sub sendmail_show { return "\"$sendmail_orig\" ".join(",",map("\"$_\"",@ARGV)); }
 129
 130 sub sendmail_orig_exec
 131 {
 132         exec {$sendmail_orig} $0,@ARGV or die "exec(".sendmail_show()."): $!";
 133         die "NOTREACHED";
 134 }
 135
 136 Getopt::Long::Configure(
 137                 "no_ignorecase",
 138                 "no_getopt_compat",
 139                 "bundling",
 140                 # FIXME: workaround: 'unknown options' are considered the same as 'arguments'
 141                 # None of ($REQUIRE_ORDER, $PERMUTE, $RETURN_IN_ORDER) can help us.
 142                 # No preprocessing possible as it is hard to find option arguments.
 143                 "permute",
 144                 "pass_through",
 145                 );
 146
 147 my $opt_b;
 148 my $opt_Q;
 149 my $opt_q;
 150 my $opt_t;
 151 our $opt_f;
 152 #my $opt_F;     # declared before &FromAddress already
 153 my $opt_lacemail_dry_run;
 154 my @ARGV_save=@ARGV;    # for non-bm mode
 155 die if !Getopt::Long::GetOptions(
 156                 "b=s"              ,\$opt_b,
 157                 "Q:s"              ,\$opt_Q,
 158                 "q:s"              ,\$opt_q,
 159                 "t"                ,\$opt_t,
 160                 "f=s"              ,\$opt_f,
 161                 "F=s"              ,\$opt_F,
 162                 "lacemail-dry-run+",\$opt_lacemail_dry_run,
 163                 );
 164 if (0
 165                 # RedHat sendmail-8.12.5-7/sendmail/main.c/\QDo a quick prescan of the argument list.\E
 166                 || grep({ File::Basename::basename($0) eq $_; } "newaliases","mailq","smtpd","hoststat","purgestat")
 167                 # -bm: Deliver mail in the usual way (default).
 168                 || (defined($opt_b) && $opt_b ne "m")
 169                 || defined $opt_q       # MD_QUEUERUN
 170                 || defined $opt_Q       # MD_QUEUERUN
 171                 ) {
 172         @ARGV=@ARGV_save;
 173         sendmail_orig_exec();
 174         die "NOTREACHED";
 175         }
 176
 177 # RedHat sendmail-8.9.3-20/src/main.c/main()/\Qif (FullName != NULL)\E
 178 #   for $opt_F is implemented by Mail::Address in our &FromAddress
 179
 180 my $head=Mail::Header->new(\*STDIN);
 181 # We may (=will) change the contents and send it multiple times
 182 if (defined(my $msgid=$head->get("Message-ID"))) {
 183         $head->delete("Message-ID");
 184         $head->replace("X-LaceMail-sendmail-Message-ID",$msgid);
 185         }
 186 # options leave in @ARGV, addresses to @addr:
 187 my @args=@ARGV; # temporary
 188 @ARGV=();       # options
 189 my @addr=();    # addresses
 190 push @{(/^-./ ? \@ARGV : \@addr)},$_ for (@args);
 191 if ($opt_t) {
 192         for my $addrobj (map({ Mail::Address->parse($_); } map({ ($head->get($_)); } @h_rcpt))) {
 193                 if (!$addrobj->address()) {
 194                         # bogus, shouldn't happen
 195                         warn "->address() not found in \"".$addrobj->format()."\"";
 196                         next;
 197                 }
 198                 push @addr,$addrobj;
 199                 }
 200         }
 201
 202 # return: Mail::Address instance or undef()
 203 sub parseone
 204 {
 205 my($line)=@_;
 206
 207         return undef() if !defined $line;
 208         my @r=Mail::Address->parse($line);
 209         warn "Got ".scalar(@r)." addresses while wanting just one; when parsing: $line" if 1!=@r;
 210         return $r[0];
 211 }
 212
 213 sub matches
 214 {
 215         return
 216 }
 217
 218 my $from_headername;
 219 {
 220         my $muttrc_From=parseone(scalar muttrc_get("from"));    # may get undef()!; parseone() may be redundant
 221         $muttrc_From=$muttrc_From->address() if $muttrc_From;
 222         $opt_f=undef() if defined($opt_f) && $muttrc_From && lc($opt_f) eq lc($muttrc_From);
 223         for (@h_from) {
 224                 $from_headername=$_;    # leave last item in $from_headername
 225                 next if !(my @from_val=$head->get($from_headername));
 226                 @from_val=map({ ($_->address()); } map({ (Mail::Address->parse($_)); } @from_val));
 227                 $from_headername=undef() if !(1==@from_val && $muttrc_From && lc($from_val[0]) eq lc($muttrc_From));
 228                 last;
 229                 }       # fallthru with $from_headername remaining set if last headername did not exist
 230         # now $from_headername contains the header name to be replaced w/substituted value
 231         }
 232
 233 my $exitcode=0;
 234 # !defined($rcpt) if we have no recipients
 235 # make the list unique to prevent dupes being normally filtered by sendmail(8)
 236 # one '{' is block-wrapper, another '{' is hash-indirection!
 237 my @rcpts=keys(%{{ map(($_=>1),(@addr ? @addr : (undef()))) }});
 238
 239 my $stdin_body=(@rcpts<=1 ? undef() : do {      # store input data only if it will be used multiple times
 240                 local $/=undef();
 241                 <STDIN>;
 242                 });
 243 for my $rcpt (@rcpts) {
 244         local @ARGV=@ARGV;
 245         local $opt_f=$opt_f;
 246
 247         if (defined $rcpt) {    # !defined($rcpt) if we have no recipients
 248                 local $_;
 249                 if (!ref $rcpt) {
 250                         $rcpt=parseone $rcpt;
 251                         next if !defined $rcpt;
 252                         }
 253                 $opt_f=FromAddress($rcpt,1)->address() if !defined $opt_f;
 254                 $head->replace($from_headername,FromAddress($rcpt,0)->format()) if $from_headername;
 255                 }
 256
 257         1;      # drop '-bm' if present as it is default anyway
 258         1;      # drop '-t' if present as we are looping now for it
 259         push @ARGV,"-f",$opt_f if defined $opt_f;
 260         # we don't handle "Full-Name" header thus pass "-F"
 261         # "From/Resent-From" should be handled by our &FromAddress
 262         push @ARGV,"-F",$opt_F if defined $opt_F;
 263         push @ARGV,$rcpt->address() if defined $rcpt;
 264         push @ARGV,@addr_addon;
 265
 266         local $SIG{"PIPE"}=sub { die "Got SIGPIPE from ".sendmail_show(); };
 267         local *SENDMAIL;
 268         if ($opt_lacemail_dry_run) {
 269                 print sendmail_show()."\n";
 270                 *SENDMAIL=\*STDOUT;
 271                 }
 272         else {
 273                 defined (my $pid=open SENDMAIL,"|-") or die "Cannot fork to spawn ".sendmail_show().": $!";
 274                 sendmail_orig_exec() if !$pid; # child
 275                 }
 276         $head->print(\*SENDMAIL);
 277         print SENDMAIL "\n";    # Mail::Header->print() eats the empty line but it doesn't print it
 278         if (defined($stdin_body)) {
 279                 print SENDMAIL $stdin_body;
 280                 }
 281         else {
 282                 local $_;
 283                 while (<STDIN>) {
 284                         print SENDMAIL $_;
 285                         }
 286                 }
 287
 288         next if $opt_lacemail_dry_run;  # don't close our STDOUT as it is aliased to *SENDMAIL
 289         close SENDMAIL or warn "close(".sendmail_show()."): $?=".join(",",
 290                         (!WIFEXITED($?)   ? () : ("EXITSTATUS(".WEXITSTATUS($?).")")),
 291                         (!WIFSIGNALED($?) ? () : ("TERMSIG("   .WTERMSIG($?)   .")")),
 292                         (!WIFSTOPPED($?)  ? () : ("STOPSIG("   .WSTOPSIG($?)   .")")),
 293                         );
 294         my $gotcode=(!WIFEXITED($?) ? 99 : WEXITSTATUS($?));
 295         $exitcode=$gotcode if $gotcode>$exitcode;
 296         }
 297 exit $exitcode;