560 lines
15 KiB
Perl
560 lines
15 KiB
Perl
#!/usr/bin/perl -U
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# Copyright 1996 MACS, Inc.
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# Copyright 1992, D. Brent Chapman. See the Majordomo license agreement
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# for usage rights.
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#
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# $Source: /sources/cvsrepos/majordomo/contrib/sequencer,v $
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# $Revision: 1.2 $
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# $Date: 1996/12/09 16:50:48 $
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# $Author: cwilson $
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# $State: Exp $
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#
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# $Locker: $
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#
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# sequence - a program for sequencing and archiving e-mail messages
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# from majordomo
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#
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# Based heavily upon the resend script included in the majordomo distribution
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# set our path explicitly
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$ENV{'PATH'} = "/bin:/usr/bin:/usr/sbin:/sbin";
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# What shall we use for temporary files?
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$tmp = "/tmp/majordomo.$$";
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# Before doing anything else tell the world I am sequencer
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# The mj_ prefix is reserved for tools that are part of majordomo proper.
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$main'program_name = 'sequencer';
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# If the first argument is "@filename", read the real arguments
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# from "filename", and shove them onto the ARGV for later processing
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# by &Getopts()
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if ($ARGV[0] =~ /^@/) {
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$fn = shift(@ARGV);
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$fn =~ s/^@//;
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open(AV, $fn) || die("open(AV, \"$fn\"): $!\nStopped");
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undef($/); # set input field separator
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$av = <AV>; # read whole file into string
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close(AV);
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@av = split(/\s+/, $av);
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unshift(@ARGV, @av);
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$/ = "\n";
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}
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# Read and execute the .cf file
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$cf = $ENV{"MAJORDOMO_CF"} || "/etc/majordomo.cf";
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if ($ARGV[0] eq "-C") {
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$cf = $ARGV[1];
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shift(@ARGV);
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shift(@ARGV);
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}
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if (! -r $cf) {
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die("$cf not readable; stopped");
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}
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require "$cf";
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chdir($homedir) || die("Can't chdir(\"$homedir\"): $!");
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unshift(@INC, $homedir);
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use Getopt::Std;
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require "majordomo.pl";
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require "majordomo_version.pl";
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require "config_parse.pl";
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require "shlock.pl";
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getopts("Aa:df:h:I:l:m:M:nNp:Rr:s") || die("sequencer: Getopts() failed: $!");
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if (! defined($opt_l) || ! defined($opt_h)) {
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die("sequencer: must specify both '-l list' and '-h host' arguments");
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}
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# smash case for the list name
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$opt_l =~ tr/A-Z/a-z/;
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if ( ! @ARGV) {
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die("sequencer: must specify outgoing list as last arg(s)");
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}
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$opt_r = "$opt_r@$opt_h" if ( defined($opt_r) );
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&get_config($listdir, $opt_l);
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$opt_A = &cf_ck_bool($opt_l,"moderate") if &cf_ck_bool($opt_l,"moderate");
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$opt_h = $config_opts{$opt_l,"resend_host"}
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if($config_opts{$opt_l,"resend_host"} ne '');
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$opt_a = $config_opts{$opt_l,"approve_passwd"}
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if ($config_opts{$opt_l,"approve_passwd"} ne '');
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$opt_M = $config_opts{$opt_l,"maxlength"}
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if ($config_opts{$opt_l,"maxlength"} ne '');
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$opt_f = $config_opts{$opt_l,"sender"}
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if ($config_opts{$opt_l,"sender"} ne '');
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$opt_p = $config_opts{$opt_l,"precedence"}
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if ($config_opts{$opt_l,"precedence"} ne '');
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$opt_r = $config_opts{$opt_l,"reply_to"}
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if ($config_opts{$opt_l,"reply_to"} ne '');
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$opt_I = $config_opts{$opt_l,"restrict_post"}
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if ($config_opts{$opt_l,"restrict_post"} ne '');
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$opt_R = &cf_ck_bool($opt_l,"purge_received")
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if &cf_ck_bool($opt_l,"purge_received");
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$opt_s = &cf_ck_bool($opt_l,"administrivia")
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if &cf_ck_bool($opt_l,"administrivia");
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$opt_d = &cf_ck_bool($opt_l,"debug")
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if &cf_ck_bool($opt_l,"debug");
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if (defined($opt_f)) {
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$sendmail_sender = $opt_f;
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} else {
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$sendmail_sender = "$opt_l-request";
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}
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if (defined($opt_a)) {
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if ($opt_a =~ /^\//) {
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open(PWD, $opt_a) || die("sequencer: open(PWD, \"$opt_a\"): $!");
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$opt_a = &chop_nl(<PWD>);
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}
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}
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if (defined($opt_A) && ! defined($opt_a)) {
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die("sequencer: must also specify '-a passwd' if using '-A' flag");
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}
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# code added for getting new sequence number
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if (defined($opt_N)) {
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$opt_n = $opt_N;
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}
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if (defined($opt_n)) {
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$seqfile = "$listdir/$opt_l.seq";
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if (! -r $seqfile) { # if there is no sequence file, make one
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open(SEQ, ">$seqfile") || die("sequencer: open of $seqfile failed: $!");
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print SEQ "1\n";
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close SEQ;
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}
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&main'lopen(SEQ, "<", "$seqfile") || die("sequencer: locked open of $seqfile failed: $!");
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chop($seqnum = <SEQ>);
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# note that the sequence file is opened and locked from here until
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# the message is sent
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}
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$sender = "$sendmail_sender@$opt_h";
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&open_temp(OUT, "/tmp/sequencer.$$.out") ||
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&abort("sequencer:1 Can't open /tmp/sequencer.$$.out: $!");
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&open_temp(IN, "/tmp/sequencer.$$.in") ||
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&abort("sequencer: Can't open /tmp/sequencer.$$.in: $!");
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while (<STDIN>) {
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print IN $_;
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}
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close(IN);
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open(IN, "/tmp/sequencer.$$.in") ||
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die("sequencer: Can't open /tmp/sequencer.$$.tmp: $!");
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do {
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$restart = 0;
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$pre_hdr = 1;
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while (<IN>) {
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if ($pre_hdr) {
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if (/^\s*$/) {
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# skip leading blank lines; usually only there if this is a
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# restart after an in-body "Approved:" line
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next;
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} else {
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$pre_hdr = 0;
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$in_hdr = 1;
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$kept_last = 0;
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}
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}
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if ($in_hdr) {
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if (/^\s*$/) {
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# end of header; add new header fields
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# if there is no subject, create one
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if (!defined($subject)) {
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local($foo);
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if ($config_opts{$opt_l,"subject_prefix"} ne '') {
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$foo = &config'substitute_values(
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$config_opts{$opt_l,"subject_prefix"}, $opt_l);
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# for sequencing we add a special keyword!
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if (defined($opt_n)) {
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$foo =~ s/\$SEQNUM/$seqnum/;
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}
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local($foo_pat) = $foo;
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$foo_pat =~ s/(\W)/\\$1/g;
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if (!/$foo_pat/) {
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$foo = $foo . " ";
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}
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}
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$subject = $foo . "Message for " . $opt_l;
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print OUT $subject, "\n";
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}
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print OUT "Sender: $sender\n";
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if (defined($opt_p)) {
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print OUT "Precedence: $opt_p\n";
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}
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if (defined($opt_r)) {
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print OUT "Reply-To: ", &config'substitute_values($opt_r),
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"\n";
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}
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# print out additonal headers
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if ( $config_opts{$opt_l,"message_headers"} ne '' ) {
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local($headers) = &config'substitute_values (
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$config_opts{$opt_l,"message_headers"}, $opt_l);
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$headers =~ s/\001/\n/g;
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print OUT $headers;
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}
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$in_hdr = 0;
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print OUT $_;
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# print out front matter
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if ( $config_opts{$opt_l,"message_fronter"} ne '' ) {
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local($fronter) = &config'substitute_values (
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$config_opts{$opt_l,"message_fronter"}, $opt_l);
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$fronter =~ s/\001|$/\n/g;
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print OUT $fronter;
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}
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} elsif (/^approved:\s*(.*)/i && defined($opt_a)) {
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$approved = &chop_nl($1);
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if ($approved ne $opt_a &&
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!(&main'valid_passwd($listdir, $opt_l, $approved))) {
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&bounce("Invalid 'Approved:' header");
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}
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} elsif (/^from /i # skip all these headers
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|| /^sender:/i
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|| /^return-receipt-to:/i
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|| /^errors-to:/i
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|| /^return-path:/i
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|| (/^reply-to:/i && defined($opt_r)) # skip only if "-r" set
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|| (/^precedence:/i && defined($opt_p)) # skip only if "-p" set
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|| (/^received:/i && defined($opt_R)) # skip only if "-R" set
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|| (/^\s/ && ! $kept_last) # skip if skipped last
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) {
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# reset $kept_last in case next line is continuation
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$kept_last = 0;
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} else {
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# check for administrivia requests
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if (defined($opt_s) && ! defined($approved)
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&& (/^subject:\s*subscribe\b/i ||
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/^subject:\s*unsubscribe\b/i ||
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/^subject:\s*help\b/i ||
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/^subject:\s*RCPT:\b/ ||
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/^subject:\s*Delivery Confirmation\b/ ||
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/^subject:\s*NON-DELIVERY of:/ ||
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/^subject:\s*Undeliverable Message\b/ ||
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/^subject:\s*Receipt Confirmation\b/ ||
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/^subject:\s*Failed mail\b/ ||
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/^subject:\s.*\bchange\b.*\baddress\b/ ||
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/^subject:\s*request\b.*\baddition\b/i)) {
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&bounce("Admin request");
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}
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# prepend subject prefix
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if ( (/^subject:\s*/i) &&
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($config_opts{$opt_l,"subject_prefix"} ne '')
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) {
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local($foo) = &config'substitute_values(
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$config_opts{$opt_l,"subject_prefix"}, $opt_l);
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# for sequencing we add a special keyword!
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if (defined($opt_n)) {
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$foo =~ s/\$SEQNUM/$seqnum/;
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}
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$subject = $_;
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$subject =~ s/^subject:\s*(.*)/$1/i;
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$subject = &chop_nl($foo . " " . $subject);
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local($foo_pat) = $foo;
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$foo_pat =~ s/(\W)/\\$1/g;
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s/^subject:\s*/Subject: $foo /i if !/$foo_pat/;
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}
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if ( /^from:\s*(.+)/i )
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{
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$from = $1;
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$from_last = 1;
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}
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elsif ( defined($from_last) )
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{
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if ( /^\s+(.+)/ )
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{
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$from .= " $1";
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}
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else
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{
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undef($from_last);
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}
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}
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&check_hdr_line($_); # check for length & balance
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$kept_last = 1;
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print OUT $_;
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}
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} else {
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# this isn't a header line, so print it (maybe)
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# first, though, is the first line of the body an "Approved:" line?
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if (($body_len == 0) && /^approved:\s*(.*)/i && defined($opt_a)) {
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# OK, is it a valid "Approved:" line?
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$approved = &chop_nl($1);
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if ($approved ne $opt_a &&
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!(&main'valid_passwd($listdir, $opt_l, $approved))) {
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&bounce("Invalid 'Approved:' header");
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} else {
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# Yes, it's a valid "Approved:" line...
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# So, we start over
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$restart = 1;
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close(OUT);
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unlink("/tmp/sequencer.$$.out");
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&open_temp(OUT, "/tmp/sequencer.$$.out") ||
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&abort("sequencer:2 Can't open /tmp/sequencer.$$.out: $!");
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last;
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}
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}
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$body_len += length($_);
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# make sure it doesn't make the message too long
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if (defined($opt_M) && ! defined($approved)
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&& ($body_len > $opt_M)) {
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&bounce("Message too long (>$opt_M)");
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}
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# add admin-request recognition heuristics here... (body)
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if (defined($opt_s) && ! defined($approved) && ($body_line++ < 5) && (
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/\badd me\b/i
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|| /\bdelete me\b/i || /\bremove\s+me\b/i
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|| /\bchange\b.*\baddress\b/
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|| /\bsubscribe\b/i || /^sub\b/i
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|| /\bunsubscribe\b/i || /^unsub\b/i
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|| /^\s*help\s*$/i # help
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|| /^\s*info\s*$/i # info
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|| /^\s*info\s+\S+\s*$/i # info list
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|| /^\s*lists\s*$/i # lists
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|| /^\s*which\s*$/i # which
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|| /^\s*which\s+\S+\s*$/i # which address
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|| /^\s*index\s*$/i # index
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|| /^\s*index\s+\S+\s*$/i # index list
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|| /^\s*who\s*$/i # who
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|| /^\s*who\s+\S+\s*$/i # who list
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|| /^\s*get\s+\S+\s*$/i # get file
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|| /^\s*get\s+\S+\s+\S+\s*$/i # get list file
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|| /^\s*approve\b/i
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|| /^\s*passwd\b/i
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|| /^\s*newinfo\b/i
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|| /^\s*config\b/i
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|| /^\s*newconfig\b/i
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|| /^\s*writeconfig\b/i
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|| /^\s*mkdigest\b/i
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)) {
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&bounce("Admin request");
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}
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print OUT $_;
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}
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}
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} while ($restart);
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if ( $config_opts{$opt_l,"message_footer"} ne '' ) {
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local($footer) = &config'substitute_values(
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$config_opts{$opt_l,"message_footer"}, $opt_l);
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$footer =~ s/\001/\n/g;
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print OUT $footer;
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}
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close(OUT);
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if ( defined($opt_I) && defined($from) && ! defined($approved) ) {
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local($infile) = 0;
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@files = split (/[:\t\n]+/, $opt_I);
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foreach $file (@files) {
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if ($file !~ /^\//) {
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$file = "$listdir/$file";
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}
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if ( open (LISTFD, "<${file}") != 0 ) {
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@output = grep (&addr_match($from, $_), <LISTFD>);
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close (LISTFD);
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if ( $#output != -1 ) {
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$infile = 1;
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last;
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}
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} else {
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die("sequencer:Can't open $file: $!");
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}
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}
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if ( $infile == 0 ) {
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&bounce ("Non-member submission from [$from]");
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}
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}
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if (defined($opt_A) && ! defined($approved)) {
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&bounce("Approval required");
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}
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$sendmail_cmd = "/usr/lib/sendmail $opt_m -f$sendmail_sender " .
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join(" ", @ARGV);
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if (defined($opt_d)) {
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$| = 1;
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print "Command: $sendmail_cmd\n";
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$status = (system("cat /tmp/sequencer.$$.out") >> 8);
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unlink(</tmp/sequencer.$$.*>);
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#remember to unlock the sequence file here!
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if (defined($opt_n)) {
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&main'lclose(SEQ);
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}
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exit($status);
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} else {
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local(*MAILOUT, *MAILIN, @mailer);
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@mailer = split(' ', "$sendmail_cmd");
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open(MAILOUT, "|-") || &do_exec_sendmail(@mailer);
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# create archival copy
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if (defined($opt_N)) {
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if (open (INDEX, ">>$filedir/$opt_l$filedir_suffix/INDEX")) {
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$timenow = localtime(time);
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printf(INDEX "%s\n\tFrom %s on %s\n", $subject, $from, $timenow);
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close (INDEX);
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}
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open (ARCHIVE, ">$filedir/$opt_l$filedir_suffix/$seqnum");
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}
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open(MAILIN, "/tmp/sequencer.$$.out");
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while (<MAILIN>) {
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print MAILOUT $_;
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if (defined($opt_N)) {
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print ARCHIVE $_;
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}
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}
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close(MAILOUT);
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if (defined($opt_N)) {
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close(ARCHIVE);
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}
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if (defined($opt_n)) {
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$seqnum++;
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&main'lreopen(SEQ, ">", "$seqfile");
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print SEQ $seqnum, "\n";
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&main'lclose(SEQ);
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}
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close(MAILIN);
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unlink(</tmp/sequencer.$$.*>);
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exit(0);
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}
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sub check_balance {
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# set a temporary variable
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local($t) = shift;
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# strip out all nested parentheses
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1 while $t =~ s/\([^\(\)]*\)//g;
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# strip out all nested angle brackets
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1 while $t =~ s/\<[^\<\>]*\>//g;
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# if any parentheses or angle brackets remain, were imbalanced
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if ($t =~ /[\(\)\<\>]/ && ! defined($approved)) {
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&bounce("Imbalanced parentheses or angle brackets");
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return(undef);
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}
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return(1);
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}
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sub check_hdr_line {
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local($_) = shift;
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if (! /^\s/) { # is this a continuation line?
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# Not a continuation line.
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# If $balanced_fld is defined, it means the last field was one
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# that needed to have balanced "()" and "<>" (i.e., "To:", "From:",
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# and "Cc:", so check it. We do it here in case the last field was
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# multi-line.
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if (defined($balanced_fld)) {
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&check_balance($balanced_fld);
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}
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# we undefine $balanced_fld and reset $field_len; these may be set below
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undef($balanced_fld);
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$field_len = 0;
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}
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# is this a field that must be checked for balanced "()" and "<>"?
|
|
if (defined($balanced_fld) || /^from:/i || /^cc:/i || /^to:/i) {
|
|
# yes it is, but we can't check it yet because there might be
|
|
# continuation lines. Buffer it to be checked at the beginning
|
|
# of the next non-continuation line.
|
|
|
|
# is this line too long?
|
|
if ((length($_) > 128) && ! defined($approved)) {
|
|
&bounce("Header line too long (>128)");
|
|
return(undef);
|
|
}
|
|
|
|
# is this field too long?
|
|
if ((($field_len += length($_)) > 1024) && ! defined($approved)) {
|
|
&bounce("Header field too long (>1024)");
|
|
return(undef);
|
|
}
|
|
|
|
$balanced_fld .= $_;
|
|
chop($balanced_fld);
|
|
}
|
|
|
|
# if we get here, everything was OK.
|
|
return(1);
|
|
}
|
|
|
|
sub bounce {
|
|
local($reason) = shift;
|
|
local($_);
|
|
|
|
&resend_sendmail(BOUNCE, $sender, "BOUNCE $opt_l@$opt_h: $reason");
|
|
|
|
seek(IN, 0, 0);
|
|
while (<IN>) {
|
|
print BOUNCE $_;
|
|
}
|
|
close(BOUNCE);
|
|
unlink(</tmp/sequencer.$$.*>);
|
|
exit(0);
|
|
}
|
|
|
|
sub resend_sendmail {
|
|
local(*MAIL) = shift;
|
|
local($to) = shift;
|
|
local($subject) = shift;
|
|
|
|
# clean up the addresses, for use on the sendmail command line
|
|
local(@to) = &ParseAddrs($to);
|
|
for (@to) {
|
|
$_ = join(", ", &ParseAddrs($_));
|
|
}
|
|
$to = join(", ", @to);
|
|
|
|
# open the process
|
|
if (defined($opt_d)) {
|
|
# debugging, so just say it, don't do it
|
|
open(MAIL, ">-");
|
|
print MAIL ">>> /usr/lib/sendmail -f$sendmail_sender -t\n";
|
|
} else {
|
|
local(@mailer) = split(' ',"/usr/lib/sendmail -f$sendmail_sender -t");
|
|
open(MAIL, "|-") || &do_exec_sendmail(@mailer);
|
|
}
|
|
|
|
# generate the header
|
|
print MAIL <<"EOM";
|
|
To: $to
|
|
From: $sender
|
|
Subject: $subject
|
|
|
|
EOM
|
|
|
|
return;
|
|
}
|