# boxes-lib.pl
# Functions to parsing user mail files
use POSIX;
use Fcntl;
if ($userconfig{'date_tz'} || $config{'date_tz'}) {
# Set the timezone for all date calculations, and force a conversion
# now as in some cases the first one fails!
$ENV{'TZ'} = $userconfig{'date_tz'} ||
$config{'date_tz'};
strftime('%H:%M', localtime(time()));
}
use Time::Local;
$dbm_index_min = 1000000;
$dbm_index_version = 3;
# list_mails(user|file, [start], [end])
# Returns a subset of mail from a mbox format file
sub list_mails
{
local (@rv, $h, $done);
my %index;
my $umf = &user_mail_file($_[0]);
&open_as_mail_user(MAIL, $umf) || &error("Failed to open $umf : $!");
&build_dbm_index($_[0], \%index);
local ($start, $end);
local $isize = $index{'mailcount'};
if (@_ == 1 || !defined($_[1]) && !defined($_[2])) {
$start = 0; $end = $isize-1;
}
elsif ($_[2] < 0) {
$start = $isize+$_[2]-1; $end = $isize+$_[1]-1;
$start = $start<0 ? 0 : $start;
}
else {
$start = $_[1]; $end = $_[2];
$end = $isize-1 if ($end >= $isize);
}
$rv[$isize-1] = undef if ($isize); # force array to right size
local $dash = &dash_mode($_[0]);
$start = 0 if ($start < 0);
for($i=$start; $i<=$end; $i++) {
# Seek to mail position
local @idx = split(/\0/, $index{$i});
local $pos = $idx[0];
local $startline = $idx[1];
seek(MAIL, $pos, 0);
# Read the mail
local $mail = &read_mail_fh(MAIL, $dash ? 2 : 1, 0);
$mail->{'line'} = $startline;
$mail->{'eline'} = $startline + $mail->{'lines'} - 1;
$mail->{'idx'} = $i;
# ID is position in file and message ID
$mail->{'id'} = $pos." ".$i." ".$startline." ".
substr($mail->{'header'}->{'message-id'}, 0, 255);
$rv[$i] = $mail;
}
return @rv;
}
# select_mails(user|file, &ids, headersonly)
# Returns a list of messages from an mbox with the given IDs. The ID contains
# the file offset, message number, line and message ID, and the former is used
# if valid.
sub select_mails
{
local ($file, $ids, $headersonly) = @_;
local @rv;
local (@rv);
my %index;
local $gotindex;
local $umf = &user_mail_file($file);
local $dash = &dash_mode($umf);
&open_as_mail_user(MAIL, $umf) || &error("Failed to open $umf : $!");
foreach my $i (@$ids) {
local ($pos, $idx, $startline, $wantmid) = split(/ /, $i);
# Go to where the mail is supposed to be, and check if any starts there
seek(MAIL, $pos, 0);
local $ll = <MAIL>;
local $fromok = $ll !~ /^From\s+(\S+).*\d+\r?\n/ ||
($1 eq '-' && !$dash) ? 0 : 1;
print DEBUG "seeking to $pos in $umf, got $ll";
if (!$fromok) {
# Oh noes! Need to find it
if (!$gotindex++) {
&build_dbm_index($file, \%index);
}
$pos = undef;
while(my ($k, $v) = each %index) {
if (int($k) eq $k) {
my ($p, $line, $subject, $from, $mid)=
split(/\0/, $v);
if ($mid eq $wantmid) {
# Found it!
$pos = $p;
$idx = $k;
$startline = $line;
last;
}
}
}
}
if (defined($pos)) {
# Now we can read
seek(MAIL, $pos, 0);
local $mail = &read_mail_fh(MAIL, $dash ? 2 : 1, $headersonly);
$mail->{'line'} = $startline;
$mail->{'eline'} = $startline + $mail->{'lines'} - 1;
$mail->{'idx'} = $idx;
$mail->{'id'} = "$pos $idx $startline $wantmid";
push(@rv, $mail);
}
else {
push(@rv, undef); # Mail is gone?
}
}
close(MAIL);
return @rv;
}
# idlist_mails(user|file)
# Returns a list of IDs in some mbox
sub idlist_mails
{
my %index;
local $idlist = &build_dbm_index($_[0], \%index);
return @$idlist;
}
# search_mail(user, field, match)
# Returns an array of messages matching some search
sub search_mail
{
return &advanced_search_mail($_[0], [ [ $_[1], $_[2] ] ], 1);
}
# advanced_search_mail(user|file, &fields, andmode, [&limits], [headersonly])
# Returns an array of messages matching some search
sub advanced_search_mail
{
local (%index, @rv, $i);
local $dash = &dash_mode($_[0]);
local @possible; # index positions of possible mails
local $possible_certain = 0; # is possible list authoratative?
local ($min, $max);
local $umf = &user_mail_file($_[0]);
&open_as_mail_user(MAIL, $umf) || &error("Failed to open $umf : $!");
# We have a DBM index .. if the search includes the from and subject
# fields, scan it first to cut down on the total time
&build_dbm_index($_[0], \%index);
# Check which fields are used in search
local @dbmfields = grep { $_->[0] eq 'from' ||
$_->[0] eq 'subject' } @{$_[1]};
local $alldbm = (scalar(@dbmfields) == scalar(@{$_[1]}));
$min = 0;
$max = $index{'mailcount'}-1;
if ($_[3] && $_[3]->{'latest'}) {
$min = $max - $_[3]->{'latest'};
}
# Only check DBM if it contains some fields, and if it contains all
# fields when in 'or' mode.
if (@dbmfields && ($alldbm || $_[2])) {
# Scan the DBM to build up a list of 'possibles'
for($i=$min; $i<=$max; $i++) {
local @idx = split(/\0/, $index{$i});
local $fake = { 'header' => { 'from', $idx[2],
'subject', $idx[3] } };
local $m = &mail_matches(\@dbmfields, $_[2], $fake);
push(@possible, $i) if ($m);
}
$possible_certain = $alldbm;
}
else {
# None of the DBM fields are in the search .. have to scan all
@possible = ($min .. $max);
}
# Need to scan through possible messages to find those that match
local $headersonly = !&matches_needs_body($_[1]);
foreach $i (@possible) {
# Seek to mail position
local @idx = split(/\0/, $index{$i});
local $pos = $idx[0];
local $startline = $idx[1];
seek(MAIL, $pos, 0);
# Read the mail
local $mail = &read_mail_fh(MAIL, $dash ? 2 : 1, $headersonly);
$mail->{'line'} = $startline;
$mail->{'eline'} = $startline + $mail->{'lines'} - 1;
$mail->{'idx'} = $i;
$mail->{'id'} = $pos." ".$i." ".$startline." ".
substr($mail->{'header'}->{'message-id'}, 0, 255);
push(@rv, $mail) if ($possible_certain ||
&mail_matches($_[1], $_[2], $mail));
}
return @rv;
}
# build_dbm_index(user|file, &index)
# Updates a reference to a DBM hash that indexes the given mail file.
# Hash contains keys 0, 1, 2 .. each of which has a value containing the
# position of the mail in the file, line number, subject, sender and message ID.
# Special key lastchange = time index was last updated
# mailcount = number of messages in index
# version = index format version
# Returns a list of all IDs
sub build_dbm_index
{
local ($user, $index, $noperm) = @_;
local $ifile = &user_index_file($user);
local $umf = &user_mail_file($user);
local @st = stat($umf);
if (!defined($noperm)) {
# Use global override setting
$noperm = $no_permanent_index;
}
if ($noperm && &has_dbm_index($user)) {
# Index already exists, so use it
$noperm = 0;
}
if (!$noperm) {
dbmopen(%$index, $ifile, 0600);
}
# Read file of IDs
local $idsfile = $ifile.".ids";
local @ids;
local $idschanged;
if (!$noperm && open(IDSFILE, "<", $idsfile)) {
@ids = <IDSFILE>;
chop(@ids);
close(IDSFILE);
}
if (scalar(@ids) != $index->{'mailcount'}) {
# Build for first time
print DEBUG "need meta-index rebuild for $user ",scalar(@ids)," != ",$index->{'mailcount'},"\n";
@ids = ( );
while(my ($k, $v) = each %$index) {
if ($k eq int($k) && $k < $index->{'mailcount'}) {
local ($pos, $line, $subject, $sender, $mid) =
split(/\0/, $v);
$ids[$k] = $pos." ".$k." ".$line." ".$mid;
}
elsif ($k >= $index->{'mailcount'}) {
# Old crap that is off the end
delete($index->{$k});
}
}
$index->{'mailcount'} = scalar(@ids); # Now known for sure
$idschanged = 1;
}
if (!@st ||
$index->{'lastchange'} < $st[9] ||
$index->{'lastsize'} != $st[7] ||
$st[7] < $dbm_index_min ||
$index->{'version'} != $dbm_index_version) {
# The mail file is newer than the index, or we are always re-indexing
local $fromok = 1;
local ($ll, @idx);
local $dash = &dash_mode($umf);
if ($st[7] < $dbm_index_min ||
$index->{'version'} != $dbm_index_version) {
$fromok = 0; # Always re-index
&open_as_mail_user(IMAIL, $umf);
}
else {
if (&open_as_mail_user(IMAIL, $umf)) {
# Check the last 100 messages (at most), to see if
# the mail file has been truncated, had mails deleted,
# or re-written.
local $il = $index->{'mailcount'}-1;
local $i;
for($i=($il>100 ? 100 : $il); $i>=0; $i--) {
@idx = split(/\0/, $index->{$il-$i});
seek(IMAIL, $idx[0], 0);
$ll = <IMAIL>;
$fromok = 0 if ($ll !~ /^From\s+(\S+).*\d+\r?\n/ ||
($1 eq '-' && !$dash));
}
}
else {
$fromok = 0; # No mail file yet
}
}
local ($pos, $lnum, $istart);
if ($index->{'mailcount'} && $fromok && $st[7] > $idx[0]) {
# Mail file seems to have gotten bigger, most likely
# because new mail has arrived ... only reindex the new mails
print DEBUG "re-indexing from $idx[0]\n";
$pos = $idx[0] + length($ll);
$lnum = $idx[1] + 1;
$istart = $index->{'mailcount'};
}
else {
# Mail file has changed in some other way ... do a rebuild
# of the whole index
print DEBUG "totally re-indexing\n";
$istart = 0;
$pos = 0;
$lnum = 0;
seek(IMAIL, 0, 0);
@ids = ( );
$idschanged = 1;
%$index = ( );
}
local ($doingheaders, @nidx);
while(<IMAIL>) {
if (/^From\s+(\S+).*\d+\r?\n/ && ($1 ne '-' || $dash)) {
@nidx = ( $pos, $lnum );
$idschanged = 1;
push(@ids, $pos." ".$istart." ".$lnum);
$index->{$istart++} = join("\0", @nidx);
$doingheaders = 1;
}
elsif ($_ eq "\n" || $_ eq "\r\n") {
$doingheaders = 0;
}
elsif ($doingheaders && /^From:\s*(.{0,255})/i) {
$nidx[2] = $1;
$index->{$istart-1} = join("\0", @nidx);
}
elsif ($doingheaders && /^Subject:\s*(.{0,255})/i) {
$nidx[3] = $1;
$index->{$istart-1} = join("\0", @nidx);
}
elsif ($doingheaders && /^Message-ID:\s*(.{0,255})/i) {
$nidx[4] = $1;
$index->{$istart-1} = join("\0", @nidx);
$ids[$#ids] .= " ".$1;
}
$pos += length($_);
$lnum++;
}
close(IMAIL);
$index->{'lastchange'} = time();
$index->{'lastsize'} = $st[7];
$index->{'mailcount'} = $istart;
$index->{'version'} = $dbm_index_version;
}
# Write out IDs file, if needed
if ($idschanged && !$noperm) {
open(IDSFILE, ">", $idsfile);
foreach my $id (@ids) {
print IDSFILE $id,"\n";
}
close(IDSFILE);
}
return \@ids;
}
# has_dbm_index(user|file)
# Returns 1 if a DBM index exists for some user or file
sub has_dbm_index
{
local $ifile = &user_index_file($_[0]);
foreach my $ext (".dir", ".pag", ".db") {
return 1 if (-r $ifile.$ext);
}
return 0;
}
# delete_dbm_index(user|file)
# Deletes all DBM indexes for a user or file
sub delete_dbm_index
{
local $ifile = &user_index_file($_[0]);
foreach my $ext (".dir", ".pag", ".db") {
&unlink_file($ifile.$ext);
}
}
# empty_mail(user|file)
# Truncate a mail file to nothing
sub empty_mail
{
local ($user) = @_;
local $umf = &user_mail_file($user);
local $ifile = &user_index_file($user);
&open_as_mail_user(TRUNC, ">$umf") || &error("Failed to open $umf : $!");
close(TRUNC);
# Set index size to 0 (if there is one)
if (&has_dbm_index($user)) {
local %index;
dbmopen(%index, $ifile, 0600);
$index{'mailcount'} = 0;
$index{'lastchange'} = time();
dbmclose(%index);
}
}
# count_mail(user|file)
# Returns the number of messages in some mail file
sub count_mail
{
my %index;
&build_dbm_index($_[0], \%index);
return $index{'mailcount'};
}
# parse_mail(&mail, [&parent], [savebody], [keep-cr])
# Extracts the attachments from the mail body
sub parse_mail
{
return if ($_[0]->{'parsed'}++);
local $ct = $_[0]->{'header'}->{'content-type'};
local (@attach, $h, $a);
if ($ct =~ /boundary="([^"]+)"/i || $ct =~ /boundary=([^;\s]+)/i) {
# Multipart MIME message
local $bound = "--".$1;
local @lines = $_[3] ? split(/\n/, $_[0]->{'body'})
: split(/\r?\n/, $_[0]->{'body'});
local $l;
local $max = @lines;
while($l < $max && $lines[$l++] ne $bound) {
# skip to first boundary
}
while(1) {
# read attachment headers
local (@headers, $attach);
while($lines[$l]) {
$attach->{'raw'} .= $lines[$l]."\n";
$attach->{'rawheaders'} .= $lines[$l]."\n";
if ($lines[$l] =~ /^(\S+):\s*(.*)/) {
push(@headers, [ $1, $2 ]);
}
elsif ($lines[$l] =~ /^\s+(.*)/) {
$headers[$#headers]->[1] .= " ".$1
unless($#headers < 0);
}
$l++;
}
$attach->{'raw'} .= $lines[$l]."\n";
$l++;
$attach->{'headers'} = \@headers;
foreach $h (@headers) {
$attach->{'header'}->{lc($h->[0])} = $h->[1];
}
if ($attach->{'header'}->{'content-type'} =~ /^([^;\s]+)/) {
$attach->{'type'} = lc($1);
}
elsif ($ct !~ /^multipart\/\S+/ && $ct =~ /^([^;\s]+)/) {
$attach->{'type'} = lc($1);
}
else {
$attach->{'type'} = 'text/plain';
}
if ($attach->{'header'}->{'content-disposition'} =~
/filename\s*=\s*"([^"]+)"/i) {
$attach->{'filename'} = $1;
}
elsif ($attach->{'header'}->{'content-disposition'} =~
/filename\s*=\s*([^;\s]+)/i) {
$attach->{'filename'} = $1;
}
elsif ($attach->{'header'}->{'content-type'} =~
/name\s*=\s*"([^"]+)"/i) {
$attach->{'filename'} = $1;
}
elsif ($attach->{'header'}->{'content-type'} =~
/name\s*=\s*([^;\s]+)/i) {
$attach->{'filename'} = $1;
}
# read the attachment body
while($l < $max && $lines[$l] ne $bound && $lines[$l] ne "$bound--") {
$attach->{'data'} .= $lines[$l]."\n";
$attach->{'raw'} .= $lines[$l]."\n";
$l++;
}
$attach->{'data'} =~ s/\n\n$/\n/; # Lose trailing blank line
$attach->{'raw'} =~ s/\n\n$/\n/;
# decode if necessary
if (lc($attach->{'header'}->{'content-transfer-encoding'}) eq
'base64') {
# Standard base64 encoded attachment
$attach->{'data'} = &decode_base64($attach->{'data'});
}
elsif (lc($attach->{'header'}->{'content-transfer-encoding'}) eq
'x-uue') {
# UUencoded attachment
$attach->{'data'} = &uudecode($attach->{'data'});
}
elsif (lc($attach->{'header'}->{'content-transfer-encoding'}) eq
'quoted-printable') {
# Quoted-printable text attachment
$attach->{'data'} = "ed_decode($attach->{'data'});
}
elsif (lc($attach->{'type'}) eq 'application/mac-binhex40' && &has_command("hexbin")) {
# Macintosh binhex encoded attachment
local $temp = &transname();
mkdir($temp, 0700);
open(HEXBIN, "| (cd $temp ; hexbin -n attach -d 2>/dev/null)");
print HEXBIN $attach->{'data'};
close(HEXBIN);
if (!$?) {
open(HEXBIN, "<$temp/attach.data");
local $/ = undef;
$attach->{'data'} = <HEXBIN>;
close(HEXBIN);
local $ct = &guess_mime_type($attach->{'filename'});
$attach->{'type'} = $ct;
$attach->{'header'} = { 'content-type' => $ct };
$attach->{'headers'} = [ [ 'Content-Type', $ct ] ];
}
unlink("$temp/attach.data");
rmdir($temp);
}
$attach->{'idx'} = scalar(@attach);
$attach->{'parent'} = $_[1] ? $_[1] : $_[0];
push(@attach, $attach) if (@headers || $attach->{'data'});
if ($attach->{'type'} =~ /multipart\/(\S+)/i) {
# This attachment contains more attachments ..
# expand them.
local $amail = { 'header' => $attach->{'header'},
'body' => $attach->{'data'} };
&parse_mail($amail, $attach, 0, $_[3]);
$attach->{'attach'} = [ @{$amail->{'attach'}} ];
map { $_->{'idx'} += scalar(@attach) }
@{$amail->{'attach'}};
push(@attach, @{$amail->{'attach'}});
}
elsif (lc($attach->{'type'}) eq 'application/ms-tnef') {
# This attachment is a winmail.dat file, which may
# contain multiple other attachments!
local ($opentnef, $tnef);
if (!($opentnef = &has_command("opentnef")) &&
!($tnef = &has_command("tnef"))) {
$attach->{'error'} = "tnef command not installed";
}
else {
# Can actually decode
local $tempfile = &transname();
open(TEMPFILE, ">$tempfile");
print TEMPFILE $attach->{'data'};
close(TEMPFILE);
local $tempdir = &transname();
mkdir($tempdir, 0700);
if ($opentnef) {
system("$opentnef -d $tempdir -i $tempfile >/dev/null 2>&1");
}
else {
system("$tnef -C $tempdir -f $tempfile >/dev/null 2>&1");
}
pop(@attach); # lose winmail.dat
opendir(DIR, $tempdir);
while($f = readdir(DIR)) {
next if ($f eq '.' || $f eq '..');
local $data;
open(FILE, "<$tempdir/$f");
while(<FILE>) {
$data .= $_;
}
close(FILE);
local $ct = &guess_mime_type($f);
push(@attach,
{ 'type' => $ct,
'idx' => scalar(@attach),
'header' =>
{ 'content-type' => $ct },
'headers' =>
[ [ 'Content-Type', $ct ] ],
'filename' => $f,
'data' => $data });
}
closedir(DIR);
unlink(glob("$tempdir/*"), $tempfile);
rmdir($tempdir);
}
}
last if ($l >= $max || $lines[$l] eq "$bound--");
$l++;
}
$_[0]->{'attach'} = \@attach;
}
elsif ($_[0]->{'body'} =~ /begin\s+([0-7]+)\s+(.*)/i) {
# Message contains uuencoded file(s)
local @lines = split(/\n/, $_[0]->{'body'});
local ($attach, $rest);
foreach $l (@lines) {
if ($l =~ /^begin\s+([0-7]+)\s+(.*)/i) {
$attach = { 'type' => &guess_mime_type($2),
'idx' => scalar(@{$_[0]->{'attach'}}),
'parent' => $_[1],
'filename' => $2 };
push(@{$_[0]->{'attach'}}, $attach);
}
elsif ($l =~ /^end/ && $attach) {
$attach = undef;
}
elsif ($attach) {
$attach->{'data'} .= unpack("u", $l);
}
else {
$rest .= $l."\n";
}
}
if ($rest =~ /\S/) {
# Some leftover text
push(@{$_[0]->{'attach'}},
{ 'type' => "text/plain",
'idx' => scalar(@{$_[0]->{'attach'}}),
'parent' => $_[1],
'data' => $rest });
}
}
elsif (lc($_[0]->{'header'}->{'content-transfer-encoding'}) eq 'base64') {
# Signed body section
$ct =~ s/;.*$//;
$_[0]->{'attach'} = [ { 'type' => lc($ct),
'idx' => 0,
'parent' => $_[1],
'data' => &decode_base64($_[0]->{'body'}) } ];
}
elsif (lc($_[0]->{'header'}->{'content-type'}) eq 'x-sun-attachment') {
# Sun attachment format, which can contain several sections
local $sun;
foreach $sun (split(/----------/, $_[0]->{'body'})) {
local ($headers, $rest) = split(/\r?\n\r?\n/, $sun, 2);
local $attach = { 'idx' => scalar(@{$_[0]->{'attach'}}),
'parent' => $_[1],
'data' => $rest };
if ($headers =~ /X-Sun-Data-Name:\s*(\S+)/) {
$attach->{'filename'} = $1;
}
if ($headers =~ /X-Sun-Data-Type:\s*(\S+)/) {
local $st = $1;
$attach->{'type'} = $st eq "text" ? "text/plain" :
$st eq "html" ? "text/html" :
$st =~ /\// ? $st : "application/octet-stream";
}
elsif ($attach->{'filename'}) {
$attach->{'type'} =
&guess_mime_type($attach->{'filename'});
}
else {
$attach->{'type'} = "text/plain"; # fallback
}
push(@{$_[0]->{'attach'}}, $attach);
}
}
else {
# One big attachment (probably text)
local ($type, $body);
($type = $ct) =~ s/;.*$//;
$type = 'text/plain' if (!$type);
if (lc($_[0]->{'header'}->{'content-transfer-encoding'}) eq 'base64') {
$body = &decode_base64($_[0]->{'body'});
}
elsif (lc($_[0]->{'header'}->{'content-transfer-encoding'}) eq
'quoted-printable') {
$body = "ed_decode($_[0]->{'body'});
}
else {
$body = $_[0]->{'body'};
}
if ($body =~ /\S/) {
$_[0]->{'attach'} = [ { 'type' => lc($type),
'idx' => 0,
'parent' => $_[1],
'data' => $body } ];
}
else {
# Body is completely empty
$_[0]->{'attach'} = [ ];
}
}
delete($_[0]->{'body'}) if (!$_[2]);
}
# delete_mail(user|file, &mail, ...)
# Delete mail messages from a user by copying the file and rebuilding the index
sub delete_mail
{
# Validate messages
local @m = sort { $a->{'line'} <=> $b->{'line'} } @_[1..@_-1];
foreach my $m (@m) {
defined($m->{'line'}) && defined($m->{'eline'}) &&
$m->{'eline'} > $m->{'line'} ||
&error("Message to delete is invalid, perhaps to due to ".
"out-of-date index");
}
local $i = 0;
local $f = &user_mail_file($_[0]);
local $ifile = &user_index_file($_[0]);
local $lnum = 0;
local (%dline, @fline);
local ($dpos = 0, $dlnum = 0);
local (@index, %index);
&build_dbm_index($_[0], \%index);
local $tmpf = $< == 0 ? "$f.del" :
$_[0] =~ /^\/.*\/([^\/]+)$/ ?
"$user_module_config_directory/$1.del" :
"$user_module_config_directory/$_[0].del";
if (-l $f) {
$f = &resolve_links($f);
}
&open_as_mail_user(SOURCE, $f) || &error("Failed to open $f : $!");
&create_as_mail_user(DEST, ">$tmpf") ||
&error("Failed to open temp file $tmpf : $!");
while(<SOURCE>) {
if ($i >= @m || $lnum < $m[$i]->{'line'}) {
# Within a range that we want to preserve
$dpos += length($_);
$dlnum++;
local $w = (print DEST $_);
if (!$w) {
local $e = "$!";
close(DEST);
close(SOURCE);
unlink($tmpf);
&error("Write to $tmpf failed : $e");
}
}
elsif (!$fline[$i]) {
# Start line of a message to delete
if (!/^From\s/) {
# Not actually a message! Fail now
close(DEST);
close(SOURCE);
unlink($tmpf);
&error("Index on $f is corrupt - did not find expected message start at line $lnum");
}
$fline[$i] = 1;
}
elsif ($lnum == $m[$i]->{'eline'}) {
# End line of the current message to delete
$dline{$m[$i]->{'line'}}++;
$i++;
}
$lnum++;
}
close(SOURCE);
close(DEST) || &error("Write to $tmpf failed : $?");
local @st = stat($f);
# Force a total index re-build (XXX lazy!)
$index{'mailcount'} = $in{'lastchange'} = 0;
dbmclose(%index);
if ($< == 0) {
# Replace the mail file with the copy
unlink($f);
rename($tmpf, $f);
if (!&should_switch_to_mail_user()) {
# Since write was done as root, set back permissions on the
# mail file to match the original
chown($st[4], $st[5], $f);
chmod($st[2], $f);
}
else {
&chmod_as_mail_user($st[2], $f);
}
}
else {
system("cat ".quotemeta($tmpf)." > ".quotemeta($f).
" && rm -f ".quotemeta($tmpf));
}
}
# modify_mail(user|file, old, new, textonly)
# Modify one email message in a mailbox by copying the file and rebuilding
# the index.
sub modify_mail
{
local $f = &user_mail_file($_[0]);
local $ifile = &user_index_file($_[0]);
local $lnum = 0;
local ($sizediff, $linesdiff);
local %index;
&build_dbm_index($_[0], \%index);
# Replace the email that gets modified
local $tmpf = $< == 0 ? "$f.del" :
$_[0] =~ /^\/.*\/([^\/]+)$/ ?
"$user_module_config_directory/$1.del" :
"$user_module_config_directory/$_[0].del";
if (-l $f) {
$f = &resolve_links($f);
}
&open_as_mail_user(SOURCE, $f) || &error("Failed to open $f : $!");
&create_as_mail_user(DEST, ">$tmpf") ||
&error("Failed to open temp file $tmpf : $!");
while(<SOURCE>) {
if ($lnum < $_[1]->{'line'} || $lnum > $_[1]->{'eline'}) {
# before or after the message to change
local $w = (print DEST $_);
if (!$w) {
local $e = "$?";
close(DEST);
close(SOURCE);
unlink($tmpf);
&error("Write to $tmpf failed : $e");
}
}
elsif ($lnum == $_[1]->{'line'}) {
# found start of message to change .. put in the new one
close(DEST);
local @ost = stat($tmpf);
local $nlines = &send_mail($_[2], $tmpf, $_[3], 1);
local @nst = stat($tmpf);
local $newsize = $nst[7] - $ost[7];
$sizediff = $newsize - $_[1]->{'size'};
$linesdiff = $nlines - ($_[1]->{'eline'} - $_[1]->{'line'} + 1);
&open_as_mail_user(DEST, ">>$tmpf");
}
$lnum++;
}
close(SOURCE);
close(DEST) || &error("Write failed : $!");
# Now update the index and delete the temp file
for($i=0; $i<$index{'mailcount'}; $i++) {
local @idx = split(/\0/, $index{$i});
if ($idx[1] > $_[1]->{'line'}) {
$idx[0] += $sizediff;
$idx[1] += $linesdiff;
$index{$i} = join("\0", @idx);
}
}
$index{'lastchange'} = time();
local @st = stat($f);
if ($< == 0) {
unlink($f);
rename($tmpf, $f);
if (!&should_switch_to_mail_user()) {
# Since write was done as root, set back permissions on the
# mail file to match the original
chown($st[4], $st[5], $f);
chmod($st[2], $f);
}
else {
&chmod_as_mail_user($st[2], $f);
}
}
else {
system("cat $tmpf >$f && rm -f $tmpf");
}
chown($st[4], $st[5], $f);
chmod($st[2], $f);
}
# send_mail(&mail, [file], [textonly], [nocr], [smtp-server],
# [smtp-user], [smtp-pass], [smtp-auth-mode],
# [¬ify-flags], [port], [use-ssl])
# Send out some email message or append it to a file.
# Returns the number of lines written.
sub send_mail
{
local ($mail, $file, $textonly, $nocr, $sm, $user, $pass, $auth,
$flags, $port, $ssl) = @_;
return 0 if (&is_readonly_mode());
local $lnum = 0;
$sm ||= $config{'send_mode'};
local $eol = $nocr || !$sm ? "\n" : "\r\n";
$ssl = $config{'smtp_ssl'} if ($ssl eq '');
local $defport = $ssl == 1 ? 465 : 25;
$port ||= $config{'smtp_port'} || $defport;
my %header;
foreach my $head (@{$mail->{'headers'}}) {
$header{lc($head->[0])} = $head->[1];
}
# Add the date header, always in english
&clear_time_locale();
local @tm = localtime(time());
push(@{$mail->{'headers'}},
[ 'Date', strftime("%a, %d %b %Y %H:%M:%S %z (%Z)", @tm) ])
if (!$header{'date'});
&reset_time_locale();
# Build list of destination email addresses
my @dests;
foreach my $f ("to", "cc", "bcc") {
if ($header{$f}) {
push(@dests, &address_parts($header{$f}));
}
}
my $qdests = join(" ", map { quotemeta($_) } @dests);
local @from = &address_parts($header{'from'});
local $fromaddr;
if (@from && $from[0] =~ /\S/) {
$fromaddr = $from[0];
}
else {
local @uinfo = getpwuid($<);
$fromaddr = $uinfo[0] || "nobody";
$fromaddr .= '@'.&get_system_hostname();
}
local $qfromaddr = quotemeta($fromaddr);
local $esmtp = $flags ? 1 : 0;
my $h = { 'fh' => 'mailboxes::MAIL' };
if ($file) {
# Just append the email to a file using mbox format
&open_as_mail_user($h->{'fh'}, ">>$file") ||
&error("Write failed : $!");
$lnum++;
&write_http_connection($h,
$mail->{'fromline'} ? $mail->{'fromline'}.$eol :
&make_from_line($fromaddr).$eol);
}
elsif ($sm) {
# Connect to SMTP server
&open_socket($sm, $port, $h->{'fh'});
if ($ssl == 1) {
# Start using SSL mode right away
&switch_smtp_to_ssl($h);
}
&smtp_command($h, undef, 0);
my $helo = $config{'helo_name'} || &get_system_hostname();
if ($esmtp) {
&smtp_command($h, "ehlo $helo\r\n", 0);
}
else {
&smtp_command($h, "helo $helo\r\n", 0);
}
if ($ssl == 2) {
# Switch to SSL with STARTTLS, if possible
my $rv = &smtp_command($h, "starttls\r\n", 1);
if ($rv =~ /^2\d+/) {
&switch_smtp_to_ssl($h);
}
else {
$ssl = 0;
}
}
# Get username and password from parameters, or from module config
$user ||= $userconfig{'smtp_user'} || $config{'smtp_user'};
$pass ||= $userconfig{'smtp_pass'} || $config{'smtp_pass'};
$auth ||= $userconfig{'smtp_auth'} ||
$config{'smtp_auth'} || "Cram-MD5";
if ($user) {
# Send authentication commands
eval "use Authen::SASL";
if ($@) {
&error("Perl module <tt>Authen::SASL</tt> is needed for SMTP authentication");
}
my $sasl = Authen::SASL->new('mechanism' => uc($auth),
'callback' => {
'auth' => $user,
'user' => $user,
'pass' => $pass } );
&error("Failed to create Authen::SASL object") if (!$sasl);
local $conn = $sasl->client_new("smtp", &get_system_hostname());
local $arv = &smtp_command($h, "auth $auth\r\n", 1);
if ($arv =~ /^(334)(\-\S+)?\s+(.*)/) {
# Server says to go ahead
$extra = $3;
local $initial = $conn->client_start();
local $auth_ok;
if ($initial) {
local $enc = &encode_base64($initial);
$enc =~ s/\r|\n//g;
$arv = &smtp_command($h, "$enc\r\n", 1);
if ($arv =~ /^(\d+)(\-\S+)?\s+(.*)/) {
if ($1 == 235) {
$auth_ok = 1;
}
else {
&error("Unknown SMTP authentication response : $arv");
}
}
$extra = $3;
}
while(!$auth_ok) {
local $message = &decode_base64($extra);
local $return = $conn->client_step($message);
local $enc = &encode_base64($return);
$enc =~ s/\r|\n//g;
$arv = &smtp_command($h, "$enc\r\n", 1);
if ($arv =~ /^(\d+)(\-\S+)?\s+(.*)/) {
if ($1 == 235) {
$auth_ok = 1;
}
elsif ($1 == 535) {
&error("SMTP authentication failed : $arv");
}
$extra = $3;
}
else {
&error("Unknown SMTP authentication response : $arv");
}
}
}
}
&smtp_command($h, "mail from: <$fromaddr>\r\n", 0);
local $notify = $flags ? " NOTIFY=".join(",", @$flags) : "";
foreach my $u (@dests) {
&smtp_command($h, "rcpt to: <$u>$notify\r\n", 0);
}
&smtp_command($h, "data\r\n", 0);
}
elsif (defined(&send_mail_program)) {
# Use specified mail injector
local $cmd = &send_mail_program($fromaddr, \@dests);
$cmd || &error("No mail program was found on your system!");
open($h->{'fh'}, "| $cmd >/dev/null 2>&1");
}
elsif ($config{'qmail_dir'}) {
# Start qmail-inject
open($h->{'fh'}, "| $config{'qmail_dir'}/bin/qmail-inject");
}
elsif ($config{'postfix_control_command'}) {
# Start postfix's sendmail wrapper
local $cmd = -x "/usr/lib/sendmail" ? "/usr/lib/sendmail" :
&has_command("sendmail");
$cmd || &error($text{'send_ewrapper'});
open($h->{'fh'}, "| $cmd -f$qfromaddr $qdests >/dev/null 2>&1");
}
else {
# Start sendmail
&has_command($config{'sendmail_path'}) ||
&error(&text('send_epath', "<tt>$config{'sendmail_path'}</tt>"));
open($h->{'fh'}, "| $config{'sendmail_path'} -f$qfromaddr $qdests >/dev/null 2>&1");
}
local $ctype = "multipart/mixed";
local $msg_id;
foreach $head (@{$mail->{'headers'}}) {
if (defined($mail->{'body'}) || $textonly) {
&write_http_connection($h, $head->[0],": ",$head->[1],$eol);
$lnum++;
}
else {
if ($head->[0] !~ /^(MIME-Version|Content-Type)$/i) {
&write_http_connection($h, $head->[0],": ",$head->[1],$eol);
$lnum++;
}
elsif (lc($head->[0]) eq 'content-type') {
$ctype = $head->[1];
}
}
if (lc($head->[0]) eq 'message-id') {
$msg_id++;
}
}
if (!$msg_id) {
# Add a message-id header if missing
$main::mailboxes_message_id_count++;
&write_http_connection($h, "Message-Id: <",time().".".$$.".".
$main::mailboxes_message_id_count."\@".
&get_system_hostname(),">",$eol);
}
# Work out first attachment content type
local ($ftype, $fenc);
if (@{$mail->{'attach'}} >= 1) {
local $first = $mail->{'attach'}->[0];
$ftype = "text/plain";
foreach my $h (@{$first->{'headers'}}) {
if (lc($h->[0]) eq "content-type") {
$ftype = $h->[1];
}
if (lc($h->[0]) eq "content-transfer-encoding") {
$fenc = $h->[1];
}
}
}
if (defined($mail->{'body'})) {
# Use original mail body
&write_http_connection($h, $eol);
$lnum++;
$mail->{'body'} =~ s/\r//g;
$mail->{'body'} =~ s/\n\.\n/\n\. \n/g;
$mail->{'body'} =~ s/\n/$eol/g;
$mail->{'body'} .= $eol if ($mail->{'body'} !~ /\n$/);
&write_http_connection($h, $mail->{'body'}) || &error("Write failed : $!");
$lnum += ($mail->{'body'} =~ tr/\n/\n/);
}
elsif (!@{$mail->{'attach'}}) {
# No content, so just send empty email
&write_http_connection($h, "Content-Type: text/plain",$eol);
&write_http_connection($h, $eol);
$lnum += 2;
}
elsif (!$textonly || $ftype !~ /text\/plain/i ||
$fenc =~ /quoted-printable|base64/) {
# Sending MIME-encoded email
if ($ctype !~ /multipart\/report/i) {
$ctype =~ s/;.*$//;
}
&write_http_connection($h, "MIME-Version: 1.0",$eol);
local $bound = "bound".time();
&write_http_connection($h, "Content-Type: $ctype; boundary=\"$bound\"",$eol);
&write_http_connection($h, $eol);
$lnum += 3;
# Send attachments
&write_http_connection($h, "This is a multi-part message in MIME format.",$eol);
$lnum++;
foreach $a (@{$mail->{'attach'}}) {
&write_http_connection($h, $eol);
&write_http_connection($h, "--",$bound,$eol);
$lnum += 2;
local $enc;
foreach $head (@{$a->{'headers'}}) {
&write_http_connection($h, $head->[0],": ",$head->[1],$eol);
$enc = $head->[1]
if (lc($head->[0]) eq 'content-transfer-encoding');
$lnum++;
}
&write_http_connection($h, $eol);
$lnum++;
if (lc($enc) eq 'base64') {
local $enc = &encode_base64($a->{'data'});
$enc =~ s/\r//g;
$enc =~ s/\n/$eol/g;
&write_http_connection($h, $enc);
$lnum += ($enc =~ tr/\n/\n/);
}
else {
$a->{'data'} =~ s/\r//g;
$a->{'data'} =~ s/\n\.\n/\n\. \n/g;
$a->{'data'} =~ s/\n/$eol/g;
&write_http_connection($h, $a->{'data'});
$lnum += ($a->{'data'} =~ tr/\n/\n/);
if ($a->{'data'} !~ /\n$/) {
&write_http_connection($h, $eol);
$lnum++;
}
}
}
&write_http_connection($h, $eol);
&write_http_connection($h, "--",$bound,"--",$eol) ||
&error("Write failed : $!");
&write_http_connection($h, $eol);
$lnum += 3;
}
else {
# Sending text-only mail from first attachment
local $a = $mail->{'attach'}->[0];
&write_http_connection($h, $eol);
$lnum++;
$a->{'data'} =~ s/\r//g;
$a->{'data'} =~ s/\n/$eol/g;
&write_http_connection($h, $a->{'data'}) || &error("Write failed : $!");
$lnum += ($a->{'data'} =~ tr/\n/\n/);
if ($a->{'data'} !~ /\n$/) {
&write_http_connection($h, $eol);
$lnum++;
}
}
if ($sm && !$file) {
&smtp_command($h, ".$eol", 0);
&smtp_command($h, "quit$eol", 0);
}
if (!&close_http_connection($h)) {
# Only bother to report an error on close if writing to a file
if ($file) {
&error("Write failed : $!");
}
}
return $lnum;
}
# switch_smtp_to_ssl(&handle)
# Switch an SMTP connection handle to SSL mode
sub switch_smtp_to_ssl
{
my ($h) = @_;
eval "use Net::SSLeay";
$@ && &error($text{'link_essl'});
eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
eval "Net::SSLeay::load_error_strings()";
$h->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
&error("Failed to create SSL context");
$h->{'ssl_con'} = Net::SSLeay::new($h->{'ssl_ctx'}) ||
&error("Failed to create SSL connection");
Net::SSLeay::set_fd($h->{'ssl_con'}, fileno($h->{'fh'}));
Net::SSLeay::connect($h->{'ssl_con'}) ||
&error("SSL connect() failed");
}
# unparse_mail(&attachments, eol, boundary)
# Convert an array of attachments into MIME format, and return them as an
# array of lines.
sub unparse_mail
{
local ($attach, $eol, $bound) = @_;
local @rv;
foreach my $a (@$attach) {
push(@rv, $eol);
push(@rv, "--".$bound.$eol);
local $enc;
foreach my $h (@{$a->{'headers'}}) {
push(@rv, $h->[0].": ".$h->[1].$eol);
$enc = $h->[1]
if (lc($h->[0]) eq 'content-transfer-encoding');
}
push(@rv, $eol);
if (lc($enc) eq 'base64') {
local $enc = &encode_base64($a->{'data'});
$enc =~ s/\r//g;
foreach my $l (split(/\n/, $enc)) {
push(@rv, $l.$eol);
}
}
else {
$a->{'data'} =~ s/\r//g;
$a->{'data'} =~ s/\n\.\n/\n\. \n/g;
foreach my $l (split(/\n/, $a->{'data'})) {
push(@rv, $l.$eol);
}
}
}
push(@rv, $eol);
push(@rv, "--".$bound."--".$eol);
push(@rv, $eol);
return @rv;
}
# mail_size(&mail, [textonly])
# Returns the size of an email message in bytes
sub mail_size
{
local ($mail, $textonly) = @_;
local $temp = &transname();
&send_mail($mail, $temp, $textonly);
local @st = stat($temp);
unlink($temp);
return $st[7];
}
# can_read_mail(user)
sub can_read_mail
{
return 1 if ($_[0] && $access{'sent'} eq $_[0]);
local @u = getpwnam($_[0]);
return 0 if (!@u);
return 0 if ($_[0] =~ /\.\./);
return 0 if ($access{'mmode'} == 0);
return 1 if ($access{'mmode'} == 1);
local $u;
if ($access{'mmode'} == 2) {
foreach $u (split(/\s+/, $access{'musers'})) {
return 1 if ($u eq $_[0]);
}
return 0;
}
elsif ($access{'mmode'} == 4) {
return 1 if ($_[0] eq $remote_user);
}
elsif ($access{'mmode'} == 5) {
return $u[3] eq $access{'musers'};
}
elsif ($access{'mmode'} == 3) {
foreach $u (split(/\s+/, $access{'musers'})) {
return 0 if ($u eq $_[0]);
}
return 1;
}
elsif ($access{'mmode'} == 6) {
return ($_[0] =~ /^$access{'musers'}$/);
}
elsif ($access{'mmode'} == 7) {
return (!$access{'musers'} || $u[2] >= $access{'musers'}) &&
(!$access{'musers2'} || $u[2] <= $access{'musers2'});
}
return 0; # can't happen!
}
# from_hostname()
sub from_hostname
{
local ($d, $masq);
local $conf = &get_sendmailcf();
foreach $d (&find_type("D", $conf)) {
if ($d->{'value'} =~ /^M\s*(\S*)/) { $masq = $1; }
}
return $masq ? $masq : &get_system_hostname();
}
# mail_from_queue(qfile, [dfile|"auto"])
# Reads a message from the Sendmail mail queue
sub mail_from_queue
{
local $mail = { 'file' => $_[0] };
$mail->{'quar'} = $_[0] =~ /\/hf/;
$mail->{'lost'} = $_[0] =~ /\/Qf/;
if ($_[1] eq "auto") {
$mail->{'dfile'} = $_[0];
$mail->{'dfile'} =~ s/\/(qf|hf|Qf)/\/df/;
}
elsif ($_[1]) {
$mail->{'dfile'} = $_[1];
}
$mail->{'lfile'} = $_[0];
$mail->{'lfile'} =~ s/\/(qf|hf|Qf)/\/xf/;
local $_;
local @headers;
open(QF, "<", $_[0]) || return undef;
while(<QF>) {
s/\r|\n//g;
if (/^M(.*)/) {
$mail->{'status'} = $1;
}
elsif (/^H\?[^\?]*\?(\S+):\s+(.*)/ || /^H(\S+):\s+(.*)/) {
push(@headers, [ $1, $2 ]);
$mail->{'rawheaders'} .= "$1: $2\n";
}
elsif (/^\s+(.*)/) {
$headers[$#headers]->[1] .= $1 unless($#headers < 0);
$mail->{'rawheaders'} .= $_."\n";
}
}
close(QF);
$mail->{'headers'} = \@headers;
foreach $h (@headers) {
$mail->{'header'}->{lc($h->[0])} = $h->[1];
}
if ($mail->{'dfile'}) {
# Read the mail body
open(DF, "<", $mail->{'dfile'});
while(<DF>) {
$mail->{'body'} .= $_;
}
close(DF);
}
local $datafile = $mail->{'dfile'};
if (!$datafile) {
($datafile = $mail->{'file'}) =~ s/\/(qf|hf|Qf)/\/df/;
}
local @st0 = stat($mail->{'file'});
local @st1 = stat($datafile);
$mail->{'size'} = $st0[7] + $st1[7];
return $mail;
}
# wrap_lines(text, width)
# Given a multi-line string, return an array of lines wrapped to
# the given width
sub wrap_lines
{
local @rv;
local $w = $_[1];
foreach $rest (split(/\n/, $_[0])) {
if ($rest =~ /\S/) {
while($rest =~ /^(.{1,$w}\S*)\s*([\0-\377]*)$/) {
push(@rv, $1);
$rest = $2;
}
}
else {
# Empty line .. keep as it is
push(@rv, $rest);
}
}
return @rv;
}
# smtp_command(&handle, command, no-error)
# Send a single SMTP command to some file handle, and read back the response
sub smtp_command
{
my ($h, $c, $noerr) = @_;
if ($c) {
&write_http_connection($h, $c);
}
my $r = &read_http_connection($h);
if ($r !~ /^[23]\d+/ && !$noerr) {
$c =~ s/\r|\n//g;
&error(&text('send_esmtp', "<tt>".&html_escape($c)."</tt>",
"<tt>".&html_escape($r)."</tt>"));
}
$r =~ s/\r|\n//g;
if ($r =~ /^(\d+)\-/) {
# multi-line ESMTP response!
while(1) {
my $nr = &read_http_connection($h);
$nr =~ s/\r|\n//g;
if ($nr =~ /^(\d+)\-(.*)/) {
$r .= "\n".$2;
}
elsif ($nr =~ /^(\d+)\s+(.*)/) {
$r .= "\n".$2;
last;
}
}
}
return $r;
}
# address_parts(string)
# Returns the email addresses in a string
sub address_parts
{
local @rv = map { $_->[0] } &split_addresses($_[0]);
return wantarray ? @rv : $rv[0];
}
# link_urls(text, separate)
# Converts URLs into HTML links
sub link_urls
{
local $r = $_[0];
local $tar = $_[1] ? "target=_blank" : "";
$r =~ s/((http|ftp|https|mailto):[^><"'\s]+[^><"'\s\.\)])/<a href="$1" $tar>$1<\/a>/g;
return $r;
}
# link_urls_and_escape(text, separate)
# HTML escapes some text, as well as properly linking URLs in it
sub link_urls_and_escape
{
local $l = $_[0];
local $rv;
local $tar = $_[1] ? " target=_blank" : "";
while($l =~ /^(.*?)((http|ftp|https|mailto):[^><"'\s]+[^><"'\s\.\)])(.*)/) {
local ($before, $url, $after) = ($1, $2, $4);
$rv .= &eucconv_and_escape($before)."<a href='$url' $tar>".
&html_escape($url)."</a>";
$l = $after;
}
$rv .= &eucconv_and_escape($l);
return $rv;
}
# links_urls_new_target(html)
# Converts any links without targets to open in a new window
sub links_urls_new_target
{
local $l = $_[0];
local $rv;
while($l =~ s/^([\0-\377]*?)<\s*a\s+([^>]*href[^>]*)>//i) {
local ($before, $a) = ($1, $2);
if ($a !~ /target\s*=/i) {
$a .= " target=_blank";
}
$rv .= $before."<a ".$a.">";
}
$rv .= $l;
return $rv;
}
# uudecode(text)
sub uudecode
{
local @lines = split(/\n/, $_[0]);
local ($l, $data);
for($l=0; $lines[$l] !~ /begin\s+([0-7]+)\s/i; $l++) { }
while($lines[++$l]) {
$data .= unpack("u", $lines[$l]);
}
return $data;
}
# simplify_date(datestring, [format])
# Given a date from an email header, convert to the user's preferred format
sub simplify_date
{
local ($date, $fmt) = @_;
local $u = &parse_mail_date($date);
if ($u) {
my $locale;
if ($userconfig{'date_fmt'} eq 'auto' || $config{'date_fmt'} eq 'auto') {
eval "use DateTime; use DateTime::Locale; use DateTime::TimeZone;";
if (!$@) {
$locale++;
return &make_date($u, undef, $fmt);
}
}
if (!$locale) {
$fmt ||= $userconfig{'date_fmt'} || $config{'date_fmt'} || "dmy";
local $strf = $fmt eq "dmy" ? "%d/%m/%Y" :
$fmt eq "mdy" ? "%m/%d/%Y" :
"%Y/%m/%d";
return strftime("$strf %H:%M", localtime($u));
}
}
elsif ($date =~ /^(\S+),\s+0*(\d+)\s+(\S+)\s+(\d+)\s+(\d+):(\d+)/) {
return "$2/$3/$4 $5:$6";
}
elsif ($date =~ /^0*(\d+)\s+(\S+)\s+(\d+)\s+(\d+):(\d+)/) {
return "$1/$2/$3 $4:$5";
}
return $date;
}
# simplify_from(from)
# Simplifies a From: address for display in the mail list. Only the first
# address is returned.
sub simplify_from
{
local $rv = &convert_header_for_display($_[0], 0, 1);
local @sp = &split_addresses($rv);
if (!@sp) {
return $text{'mail_nonefrom'};
}
else {
local $first = &html_escape($sp[0]->[1] ? $sp[0]->[1] : $sp[0]->[2]);
if (length($first) > 80) {
return substr($first, 0, 80)." ..";
}
else {
return $first.(@sp > 1 ? " , ..." : "");
}
}
}
# convert_header_for_display(string, [max-non-html-length], [no-escape])
# Given a string from an email header, perform all mime-decoding, charset
# changes and HTML escaping needed to render it in a browser
sub convert_header_for_display
{
local ($str, $max, $noescape) = @_;
local ($mw, $cs) = &decode_mimewords($str);
if (&get_charset() eq 'UTF-8' && &can_convert_to_utf8($mw, $cs)) {
$mw = &convert_to_utf8($mw, $cs);
}
local $rv = &eucconv($mw);
$rv = substr($rv, 0, $max)." .." if ($max && length($rv) > $max);
return $noescape ? $rv : &html_escape($rv);
}
# simplify_subject(subject)
# Simplifies and truncates a subject header for display in the mail list
sub simplify_subject
{
return &convert_header_for_display($_[0], int($in{'simplify-subject-length'}) || 100);
}
# quoted_decode(text)
# Converts quoted-printable format to the original
sub quoted_decode
{
local $t = $_[0];
$t =~ s/[ \t]+?(\r?\n)/$1/g;
$t =~ s/=\r?\n//g;
$t =~ s/(^|[^\r])\n\Z/$1\r\n/;
$t =~ s/=([a-fA-F0-9]{2})/pack("c",hex($1))/ge;
return $t;
}
# quoted_encode(text)
# Encodes text to quoted-printable format
sub quoted_encode
{
local $t = $_[0];
$t =~ s/([=\177-\377])/sprintf("=%2.2X",ord($1))/ge;
return $t;
}
# decode_mimewords(string)
# Converts a string in MIME words format like
# =?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?= to actual 8-bit characters
sub decode_mimewords {
my $encstr = shift;
my %params = @_;
my @tokens;
$@ = ''; ### error-return
### Collapse boundaries between adjacent encoded words:
$encstr =~ s{(\?\=)\r?\n?[ \t](\=\?)}{$1$2}gs;
pos($encstr) = 0;
### print STDOUT "ENC = [", $encstr, "]\n";
### Decode:
my ($charset, $encoding, $enc, $dec);
while (1) {
last if (pos($encstr) >= length($encstr));
my $pos = pos($encstr); ### save it
### Case 1: are we looking at "=?..?..?="?
if ($encstr =~ m{\G # from where we left off..
=\?([^?]*) # "=?" + charset +
\?([bq]) # "?" + encoding +
\?([^?]+) # "?" + data maybe with spcs +
\?= # "?="
}xgi) {
($charset, $encoding, $enc) = ($1, lc($2), $3);
$dec = (($encoding eq 'q') ? _decode_Q($enc) : _decode_B($enc));
push @tokens, [$dec, $charset];
next;
}
### Case 2: are we looking at a bad "=?..." prefix?
### We need this to detect problems for case 3, which stops at "=?":
pos($encstr) = $pos; # reset the pointer.
if ($encstr =~ m{\G=\?}xg) {
$@ .= qq|unterminated "=?..?..?=" in "$encstr" (pos $pos)\n|;
push @tokens, ['=?'];
next;
}
### Case 3: are we looking at ordinary text?
pos($encstr) = $pos; # reset the pointer.
if ($encstr =~ m{\G # from where we left off...
([\x00-\xFF]*? # shortest possible string,
\n*) # followed by 0 or more NLs,
(?=(\Z|=\?)) # terminated by "=?" or EOS
}xg) {
length($1) or die "MIME::Words: internal logic err: empty token\n";
push @tokens, [$1];
next;
}
### Case 4: bug!
die "MIME::Words: unexpected case:\n($encstr) pos $pos\n\t".
"Please alert developer.\n";
}
if (wantarray) {
return (join('',map {$_->[0]} @tokens), $charset);
} else {
return join('',map {$_->[0]} @tokens);
}
}
# _decode_Q STRING
# Private: used by _decode_header() to decode "Q" encoding, which is
# almost, but not exactly, quoted-printable. :-P
sub _decode_Q {
my $str = shift;
$str =~ s/_/\x20/g; # RFC-1522, Q rule 2
$str =~ s/=([\da-fA-F]{2})/pack("C", hex($1))/ge; # RFC-1522, Q rule 1
$str;
}
# _decode_B STRING
# Private: used by _decode_header() to decode "B" encoding.
sub _decode_B {
my $str = shift;
&decode_base64($str);
}
# encode_mimewords(string, %params)
# Converts a word with 8-bit characters to MIME words format
sub encode_mimewords
{
my ($rawstr, %params) = @_;
my $charset = 'UTF-8';
my $defenc = 'q';
my $encoding = lc($params{Encoding} || $defenc);
my $NONPRINT = "\\x00-\\x1F\\x7F-\\xFF";
if ($rawstr =~ /^[\x20-\x7E]*$/) {
# No encoding needed
return $rawstr;
}
### Encode any "words" with unsafe characters.
### We limit such words to 18 characters, to guarantee that the
### worst-case encoding give us no more than 54 + ~10 < 75 characters
my $word;
$rawstr =~ s{([ a-zA-Z0-9\x7F-\xFF]{1,18})}{ ### get next "word"
$word = $1;
$word =~ /(?:[$NONPRINT])|(?:^\s+$)/o ?
encode_mimeword($word, $encoding, $charset) : # unsafe chars
$word # OK word
}xeg;
$rawstr =~ s/\?==\?/?= =?/g;
return $rawstr;
}
# can_convert_to_utf8(string, string-charset)
# Check if the appropriate perl modules are available for UTF-8 conversion
sub can_convert_to_utf8
{
my ($str, $cs) = @_;
return 0 if ($cs eq "UTF-8");
return 0 if (!$cs);
eval "use Encode";
return 0 if ($@);
eval "use utf8";
return 0 if ($@);
return 1;
}
# convert_to_utf8(string, string-charset)
# If possible, convert a string to the UTF-8 charset
sub convert_to_utf8
{
my ($str, $cs) = @_;
&can_convert_to_utf8(@_); # Load modules
eval {
$str = Encode::decode($cs, $str);
utf8::encode($str);
};
return $str;
}
# decode_utf7(string)
# If possible, convert a string like `Gel&APY-schte` to `Gelöschte`
# It will also convert complex strings like `Gel&APY-schte & Spam`
sub decode_utf7
{
my ($a) = @_;
eval "use Encode";
return $a if ($@);
my $u = find_encoding("UTF-16BE");
return $a if (!$u);
my $s = ' ';
my @a = split($s, $a);
my @b;
foreach my $c (@a) {
my $b;
# Based on Encode::Unicode::UTF7 by Dan Kogai
while (pos($c) < length($c)) {
if ($c =~ /\G([^&]+)/ogc) {
$b .= "$1";
}
elsif ($c =~ /\G\&-/ogc) {
$b .= "&";
}
elsif ($c =~ /\G\&([A-Za-z0-9+,]+)-?/ogsc) {
my $d = $1;
$d =~ s/,/\//g;
my $p = length($d) % 4;
$d .= "=" x (4 - $p) if ($p);
$b .= $u->decode(decode_base64($d));
}
elsif ($c =~ /\G\&/ogc) {
$b = $c;
}
else {
return $a;
}
}
push(@b, $b);
}
return join($s, @b);
}
# encode_mimewords_address(string, %params)
# Given a string containing addresses into one with real names mime-words
# escaped
sub encode_mimewords_address
{
my ($rawstr, %params) = @_;
my $charset = 'UTF-8';
my $defenc = 'q';
my $encoding = lc($params{Encoding} || $defenc);
if ($rawstr =~ /^[\x20-\x7E]*$/) {
# No encoding needed
return $rawstr;
}
my @rv;
foreach my $addr (&split_addresses($rawstr)) {
my ($email, $name, $orig) = @$addr;
if ($name =~ /^[\x20-\x7E]*$/) {
# No encoding needed
push(@rv, $orig);
}
else {
# Re-encode name
my $ename = encode_mimeword($name, $encoding, $charset);
push(@rv, $ename." <".$email.">");
}
}
return join(", ", @rv);
}
# encode_mimeword(string, [encoding], [charset])
# Converts a word with 8-bit characters to MIME words format
sub encode_mimeword
{
my $word = shift;
my $encoding = uc(shift || 'Q');
my $charset = 'UTF-8';
my $encfunc = (($encoding eq 'Q') ? \&_encode_Q : \&_encode_B);
return "=?$charset?$encoding?" . &$encfunc($word) . "?=";
}
# _encode_Q STRING
# Private: used by _encode_header() to decode "Q" encoding, which is
# almost, but not exactly, quoted-printable. :-P
sub _encode_Q {
my $str = shift;
my $NONPRINT = "\\x00-\\x1F\\x7F-\\xFF";
$str =~ s{([ _\?\=$NONPRINT])}{sprintf("=%02X", ord($1))}eog;
return $str;
}
# _encode_B STRING
# Private: used by _decode_header() to decode "B" encoding.
sub _encode_B {
my $str = shift;
my $enc = &encode_base64($str);
$enc =~ s/\n//;
return $enc;
}
# user_mail_file(user|file, [other details])
sub user_mail_file
{
if ($_[0] =~ /^\//) {
return $_[0];
}
elsif ($config{'mail_dir'}) {
return &mail_file_style($_[0], $config{'mail_dir'},
$config{'mail_style'});
}
elsif (@_ > 1) {
return "$_[7]/$config{'mail_file'}";
}
else {
local @u = getpwnam($_[0]);
return "$u[7]/$config{'mail_file'}";
}
}
# mail_file_style(user, basedir, style)
# Given a directory and username, returns the path to that user's mail file
# under the directory based on the style (which may force use of parts of
# the username).
sub mail_file_style
{
if ($_[2] == 0) {
return "$_[1]/$_[0]";
}
elsif ($_[2] == 1) {
return $_[1]."/".substr($_[0], 0, 1)."/".$_[0];
}
elsif ($_[2] == 2) {
return $_[1]."/".substr($_[0], 0, 1)."/".
substr($_[0], 0, 2)."/".$_[0];
}
else {
return $_[1]."/".substr($_[0], 0, 1)."/".
substr($_[0], 1, 1)."/".$_[0];
}
}
# user_index_file(user|file)
sub user_index_file
{
local $us = $_[0];
$us =~ s/\//_/g;
local $f;
local $hn = &get_system_hostname();
if ($_[0] =~ /^\/.*\/([^\/]+)$/) {
# A file .. the index file is in ~/.usermin/mailbox or
# /etc/webmin/mailboxes
if ($user_module_config_directory && $config{'shortindex'}) {
# Use short name for index file
$f = "$user_module_config_directory/$1.findex";
}
elsif ($user_module_config_directory) {
# Under user's .usermin directory
$f = "$user_module_config_directory/$us.findex";
}
else {
# Under /var/webmin or /etc/webmin
$f = "$module_config_directory/$us.findex";
if (!glob($f."*")) {
$f = "$module_var_directory/$us.findex";
}
}
}
else {
# A username .. the index file is in /var/webmin/modules/mailboxes or
# /etc/webmin/mailboxes
if ($user_module_config_directory) {
$f = "$user_module_config_directory/$_[0].index";
}
else {
$f = "$module_config_directory/$_[0].index";
if (!glob($f."*")) {
$f = "$module_var_directory/$_[0].index";
}
}
}
# Append hostname if requested, unless an index file without the hostname
# already exists
return $config{'noindex_hostname'} ? $f :
-r $f && !-r "$f.$hn" ? $f : "$f.$hn";
}
# extract_mail(data)
# Converts the text of a message into mail object.
sub extract_mail
{
local $text = $_[0];
$text =~ s/^\s+//;
local ($amail, @aheaders, $i);
local @alines = split(/\n/, $text);
while($i < @alines && $alines[$i]) {
if ($alines[$i] =~ /^(\S+):\s*(.*)/) {
push(@aheaders, [ $1, $2 ]);
$amail->{'rawheaders'} .= $alines[$i]."\n";
}
elsif ($alines[$i] =~ /^\s+(.*)/) {
$aheaders[$#aheaders]->[1] .= $1 unless($#aheaders < 0);
$amail->{'rawheaders'} .= $alines[$i]."\n";
}
$i++;
}
$amail->{'headers'} = \@aheaders;
foreach $h (@aheaders) {
$amail->{'header'}->{lc($h->[0])} = $h->[1];
}
splice(@alines, 0, $i);
$amail->{'body'} = join("\n", @alines)."\n";
return $amail;
}
# split_addresses(string)
# Splits a comma-separated list of addresses into [ email, real-name, original ]
# triplets
sub split_addresses
{
local (@rv, $str = $_[0]);
while(1) {
$str =~ s/\\"/\0/g;
if ($str =~ /^[\s,;]*(([^<>\(\)\s"]+)\s+\(([^\(\)]+)\))(.*)$/) {
# An address like foo@bar.com (Fooey Bar)
push(@rv, [ $2, $3, $1 ]);
$str = $4;
}
elsif ($str =~ /^[\s,;]*("([^"]*)"\s*<([^\s<>,]+)>)(.*)$/ ||
$str =~ /^[\s,;]*(([^<>\@]+)\s+<([^\s<>,]+)>)(.*)$/ ||
$str =~ /^[\s,;]*(([^<>\@]+)<([^\s<>,]+)>)(.*)$/ ||
$str =~ /^[\s,;]*(([^<>\[\]]+)\s+\[mailto:([^\s\[\]]+)\])(.*)$/||
$str =~ /^[\s,;]*(()<([^<>,]+)>)(.*)/ ||
$str =~ /^[\s,;]*(()([^\s<>,;]+))(.*)/) {
# Addresses like "Fooey Bar" <foo@bar.com>
# Fooey Bar <foo@bar.com>
# Fooey Bar<foo@bar.com>
# Fooey Bar [mailto:foo@bar.com]
# <foo@bar.com>
# <group name>
# foo@bar.com or foo
my ($all, $name, $email, $rest) = ($1, $2, $3, $4);
$all =~ s/\0/\\"/g;
$name =~ s/\0/"/g;
push(@rv, [ $email, $name eq "," ? "" : $name, $all ]);
$str = $rest;
}
else {
last;
}
}
return @rv;
}
$match_ascii = '\x1b\([BHJ]([\t\x20-\x7e]*)';
$match_jis = '\x1b\$[@B](([\x21-\x7e]{2})*)';
sub eucconv {
local($_) = @_;
if ($current_lang eq 'ja_JP.euc') {
s/$match_jis/&j2e($1)/geo;
s/$match_ascii/$1/go;
}
$_;
}
sub j2e {
local($_) = @_;
tr/\x21-\x7e/\xa1-\xfe/;
$_;
}
# eucconv_and_escape(string)
# Convert a string for display
sub eucconv_and_escape {
return &html_escape(&eucconv($_[0]));
}
# list_maildir(file, [start], [end], [headersonly])
# Returns a subset of mail from a maildir format directory
sub list_maildir
{
local (@rv, $i, $f);
&mark_read_maildir($_[0]);
local @files = &get_maildir_files($_[0]);
local ($start, $end);
if (!defined($_[1])) {
$start = 0;
$end = @files - 1;
}
elsif ($_[2] < 0) {
$start = @files + $_[2] - 1;
$end = @files + $_[1] - 1;
$start = 0 if ($start < 0);
}
else {
$start = $_[1];
$end = $_[2];
$end = @files-1 if ($end >= @files);
}
foreach $f (@files) {
if ($i < $start || $i > $end) {
# Skip files outside requested index range
push(@rv, undef);
$i++;
next;
}
local $mail = &read_mail_file($f, $_[3]);
$mail->{'idx'} = $i++;
$mail->{'id'} = $f; # ID is relative path, like cur/4535534
$mail->{'id'} = substr($mail->{'id'}, length($_[0])+1);
push(@rv, $mail);
}
return @rv;
}
# idlist_maildir(file)
# Returns a list of files in a maildir, which form the IDs
sub idlist_maildir
{
local ($file) = @_;
&mark_read_maildir($file);
return map { substr($_, length($file)+1) } &get_maildir_files($file);
}
# select_maildir(file, &ids, headersonly)
# Returns a list of messages with the given IDs, from a maildir directory
sub select_maildir
{
local ($file, $ids, $headersonly) = @_;
&mark_read_maildir($file);
local @files = &get_maildir_files($file);
local @rv;
foreach my $i (@$ids) {
local $path = "$file/$i";
local $mail = &read_mail_file($path, $headersonly);
if (!$mail && $path =~ /^(.*)\/(cur|tmp|new)\/([^:]*)(:2,([A-Za-z]*))?$/) {
# Flag may have changed - update path
local $suffix = "$2/$3";
local ($newfile) = grep
{ substr($_, length($file)+1, length($suffix)) eq $suffix }
@files;
if ($newfile) {
$path = $newfile;
$mail = &read_mail_file($path, $headersonly);
}
}
if (!$mail && $path =~ /\/cur\//) {
# May have moved - update path
$path =~ s/\/cur\//\/new\//g;
$mail = &read_mail_file($path, $headersonly);
}
if ($mail) {
# Set ID from corrected path
$mail->{'id'} = $path;
$mail->{'id'} = substr($mail->{'id'}, length($file)+1);
# Get index in directory
$mail->{'idx'} = &indexof($path, @files);
}
push(@rv, $mail);
}
return @rv;
}
# Get ordered list of message files (with in-memory and on-disk caching, as
# this can be slow)
# get_maildir_files(directory)
sub get_maildir_files
{
# Work out last modified time
local $newest;
foreach my $d ("$_[0]/cur", "$_[0]/new") {
local @dst = stat($d);
$newest = $dst[9] if ($dst[9] > $newest);
}
local $skipt = $config{'maildir_deleted'} || $userconfig{'maildir_deleted'};
local @files;
if (defined($main::list_maildir_cache{$_[0]}) &&
$main::list_maildir_cache_time{$_[0]} == $newest) {
# Use the in-memory cache cache
@files = @{$main::list_maildir_cache{$_[0]}};
}
else {
# Check the on-disk cache file
local $cachefile = &get_maildir_cachefile($_[0]);
local @cst = $cachefile ? stat($cachefile) : ( );
if ($cst[9] >= $newest) {
# Can read the cache
open(CACHE, "<", $cachefile);
while(<CACHE>) {
chop;
push(@files, $_[0]."/".$_);
}
close(CACHE);
$main::list_maildir_cache_time{$_[0]} = $cst[9];
}
else {
# Really read
local @shorts;
foreach my $d ("cur", "new") {
&opendir_as_mail_user(DIR, "$_[0]/$d") || &error("Failed to open $_[0]/$d : $!");
while(my $f = readdir(DIR)) {
next if ($f eq "." || $f eq "..");
if ($skipt && $f =~ /:2,([A-Za-z]*T[A-Za-z]*)$/) {
# Flagged as deleted by IMAP .. skip
next;
}
push(@shorts, "$d/$f")
}
closedir(DIR);
}
@shorts = sort { substr($a, 4) cmp substr($b, 4) } @shorts;
@files = map { "$_[0]/$_" } @shorts;
# Write out the on-disk cache
if ($cachefile) {
&open_tempfile(CACHE, ">$cachefile", 1);
my $err;
foreach my $f (@shorts) {
my $ok = (print CACHE $f,"\n");
$err++ if (!$ok);
}
&close_tempfile(CACHE) if (!$err);
local @st = stat($_[0]);
if ($< == 0) {
# Cache should have some ownership as directory
&set_ownership_permissions($st[4], $st[5],
undef, $cachefile);
}
}
$main::list_maildir_cache_time{$_[0]} = $st[9];
}
$main::list_maildir_cache{$_[0]} = \@files;
}
return @files;
}
# search_maildir(file, field, what)
# Search for messages in a maildir directory, and return the results
sub search_maildir
{
return &advanced_search_maildir($_[0], [ [ $_[1], $_[2] ] ], 1);
}
# advanced_search_maildir(user|file, &fields, andmode, [&limit], [headersonly])
# Search for messages in a maildir directory, and return the results
sub advanced_search_maildir
{
&mark_read_maildir($_[0]);
local @rv;
local ($min, $max);
if ($_[3] && $_[3]->{'latest'}) {
$min = -1;
$max = -$_[3]->{'latest'};
}
local $headersonly = $_[4] && !&matches_needs_body($_[1]);
foreach $mail (&list_maildir($_[0], $min, $max, $headersonly)) {
push(@rv, $mail) if ($mail &&
&mail_matches($_[1], $_[2], $mail));
}
return @rv;
}
# mark_read_maildir(dir)
# Move any messages in the 'new' directory of this maildir to 'cur'
sub mark_read_maildir
{
local ($dir) = @_;
local @files = &get_maildir_files($dir);
local $i = 0;
foreach my $nf (@files) {
if (substr($nf, length($dir)+1, 3) eq "new") {
local $cf = $nf;
$cf =~ s/\/new\//\/cur\//g;
if (&rename_as_mail_user($nf, $cf)) {
$files[$i] = $cf;
$changed = 1;
}
}
$i++;
}
if ($changed) {
# Update the cache
$main::list_maildir_cache{$dir} = \@files;
local $cachefile = &get_maildir_cachefile($dir);
if ($cachefile) {
&open_tempfile(CACHE, ">$cachefile", 1);
foreach my $f (@files) {
local $short = substr($f, length($dir)+1);
&print_tempfile(CACHE, $short,"\n");
}
&close_tempfile(CACHE);
local @st = stat($_[0]);
if ($< == 0) {
&set_ownership_permissions($st[4], $st[5],
undef, $cachefile);
}
}
}
}
# delete_maildir(&mail, ...)
# Delete messages from a maildir directory
sub delete_maildir
{
local $m;
# Find all maildirs being deleted from
local %dirs;
foreach $m (@_) {
if ($m->{'file'} =~ /^(.*)\/(cur|new)\/([^\/]+)$/) {
$dirs{$1}->{"$2/$3"} = 1;
}
}
# Delete from caches
foreach my $dir (keys %dirs) {
local $cachefile = &get_maildir_cachefile($dir);
next if (!$cachefile);
local @cst = stat($cachefile);
next if (!@cst);
# Work out last modified time, and don't update cache if too new
local $newest;
foreach my $d ("$dir/cur", "$dir/new") {
local @dst = stat($d);
$newest = $dst[9] if ($dst[9] > $newest);
}
next if ($newest > $cst[9]);
local $lref = &read_file_lines($cachefile);
for(my $i=0; $i<@$lref; $i++) {
if ($dirs{$dir}->{$lref->[$i]}) {
# Found an entry to remove
splice(@$lref, $i--, 1);
}
}
&flush_file_lines($cachefile);
}
# Actually delete the files
foreach $m (@_) {
unlink($m->{'file'});
}
}
# modify_maildir(&oldmail, &newmail, textonly)
# Replaces a message in a maildir directory
sub modify_maildir
{
unlink($_[0]->{'file'});
&send_mail($_[1], $_[0]->{'file'}, $_[2], 1);
}
# write_maildir(&mail, directory, textonly)
# Adds some message in maildir format to a directory
sub write_maildir
{
my ($mail, $dir, $textonly) = @_;
# Work out last modified time, and don't update cache if too new
local $cachefile = &get_maildir_cachefile($dir);
local $up2date = 0;
if ($cachefile) {
local @cst = stat($cachefile);
if (@cst) {
local $newest;
foreach my $d ("$dir/cur", "$dir/new") {
local @dst = stat($d);
$newest = $dst[9] if ($dst[9] > $newest);
}
$up2date = 1 if ($newest <= $cst[9]);
}
}
# Select a unique filename and write to it
local $now = time();
$mail->{'id'} = &unique_maildir_filename($dir);
$mf = "$dir/$mail->{'id'}";
&send_mail($mail, $mf, $textonly, 1);
$mail->{'file'} = $mf;
# Set ownership of the new message file to match the directory
local @st = stat($dir);
if ($< == 0) {
&set_ownership_permissions($st[4], $st[5], undef, $mf);
}
# Create tmp and new sub-dirs, if missing
foreach my $sd ("tmp", "new") {
local $sdpath = "$dir/$sd";
if (!-d $sdpath) {
mkdir($sdpath, 0755);
if ($< == 0) {
&set_ownership_permissions($st[4], $st[5],
undef, $sdpath);
}
}
}
if ($up2date && $cachefile) {
# Bring cache up to date
$now--;
local $lref = &read_file_lines($cachefile);
push(@$lref, $mail->{'id'});
&flush_file_lines($cachefile);
}
}
# unique_maildir_filename(dir)
# Returns a filename for a new message in a maildir, relative to the directory
sub unique_maildir_filename
{
local ($dir) = @_;
mkdir("$dir/cur", 0755);
local $now = time();
local $hn = &get_system_hostname();
++$main::write_maildir_count;
local $rv;
do {
$rv = "cur/$now.$$.$main::write_maildir_count.$hn";
$now++;
} while(-r "$dir/$rv");
return $rv;
}
# empty_maildir(file)
# Delete all messages in an maildir directory
sub empty_maildir
{
local $d;
foreach $d ("$_[0]/cur", "$_[0]/new") {
local $f;
&opendir_as_mail_user(DIR, $d) || &error("Failed to open $d : $!");
while($f = readdir(DIR)) {
unlink("$d/$f") if ($f ne '.' && $f ne '..');
}
closedir(DIR);
}
&flush_maildir_cachefile($_[0]);
}
# get_maildir_cachefile(dir)
# Returns the cache file for a maildir directory
sub get_maildir_cachefile
{
local ($dir) = @_;
local $cd;
if ($user_module_config_directory) {
$cd = $user_module_config_directory;
}
else {
$cd = $module_config_directory;
if (!-r "$cd/maildircache") {
$cd = $module_var_directory;
}
}
local $sd = "$cd/maildircache";
if (!-d $sd) {
&make_dir($sd, 0755) || return undef;
}
$dir =~ s/\//_/g;
return "$sd/$dir";
}
# flush_maildir_cachefile(dir)
# Clear the on-disk and in-memory maildir caches
sub flush_maildir_cachefile
{
local ($dir) = @_;
local $cachefile = &get_maildir_cachefile($dir);
unlink($cachefile) if ($cachefile);
delete($main::list_maildir_cache{$dir});
delete($main::list_maildir_cache_time{$dir});
}
# count_maildir(dir)
# Returns the number of messages in a maildir directory
sub count_maildir
{
local @files = &get_maildir_files($_[0]);
return scalar(@files);
}
# list_mhdir(file, [start], [end], [headersonly])
# Returns a subset of mail from an MH format directory
sub list_mhdir
{
local ($start, $end, $f, $i, @rv);
&opendir_as_mail_user(DIR, $_[0]) || &error("Failed to open $_[0] : $!");
local @files = map { "$_[0]/$_" }
sort { $a <=> $b }
grep { /^\d+$/ } readdir(DIR);
closedir(DIR);
if (!defined($_[1])) {
$start = 0;
$end = @files - 1;
}
elsif ($_[2] < 0) {
$start = @files + $_[2] - 1;
$end = @files + $_[1] - 1;
$start = 0 if ($start < 0);
}
else {
$start = $_[1];
$end = $_[2];
$end = @files-1 if ($end >= @files);
}
foreach $f (@files) {
if ($i < $start || $i > $end) {
# Skip files outside requested index range
push(@rv, undef);
$i++;
next;
}
local $mail = &read_mail_file($f, $_[3]);
$mail->{'idx'} = $i++;
$mail->{'id'} = $f; # ID is message number
$mail->{'id'} = substr($mail->{'id'}, length($_[0])+1);
push(@rv, $mail);
}
return @rv;
}
# idlist_mhdir(directory)
# Returns a list of files in an MH directory, which are the IDs
sub idlist_mhdir
{
local ($dir) = @_;
&opendir_as_mail_user(DIR, $dir) || &error("Failed to open $dir : $!");
local @files = grep { /^\d+$/ } readdir(DIR);
closedir(DIR);
return @files;
}
# get_mhdir_files(directory)
# Returns a list of full paths to files in an MH directory
sub get_mhdir_files
{
local ($dir) = @_;
return map { "$dir/$_" } &idlist_mhdir($dir);
}
# select_mhdir(file, &ids, headersonly)
# Returns a list of messages with the given indexes, from an mhdir directory
sub select_mhdir
{
local ($file, $ids, $headersonly) = @_;
local @rv;
&opendir_as_mail_user(DIR, $file) || &error("Failed to open $file : $!");
local @files = map { "$file/$_" }
sort { $a <=> $b }
grep { /^\d+$/ } readdir(DIR);
closedir(DIR);
foreach my $i (@$ids) {
local $mail = &read_mail_file("$file/$i", $headersonly);
if ($mail) {
$mail->{'idx'} = &indexof("$file/$i", @files);
$mail->{'id'} = $i;
}
push(@rv, $mail);
}
return @rv;
}
# search_mhdir(file|user, field, what)
# Search for messages in an MH directory, and return the results
sub search_mhdir
{
return &advanced_search_mhdir($_[0], [ [ $_[1], $_[2] ] ], 1);
}
# advanced_search_mhdir(file|user, &fields, andmode, &limit, [headersonly])
# Search for messages in an MH directory, and return the results
sub advanced_search_mhdir
{
local @rv;
local ($min, $max);
if ($_[3] && $_[3]->{'latest'}) {
$min = -1;
$max = -$_[3]->{'latest'};
}
local $headersonly = $_[4] && !&matches_needs_body($_[1]);
foreach $mail (&list_mhdir($_[0], $min, $max, $headersonly)) {
push(@rv, $mail) if ($mail && &mail_matches($_[1], $_[2], $mail));
}
return @rv;
}
# delete_mhdir(&mail, ...)
# Delete messages from an MH directory
sub delete_mhdir
{
local $m;
foreach $m (@_) {
unlink($m->{'file'});
}
}
# modify_mhdir(&oldmail, &newmail, textonly)
# Replaces a message in a maildir directory
sub modify_mhdir
{
unlink($_[0]->{'file'});
&send_mail($_[1], $_[0]->{'file'}, $_[2], 1);
}
# max_mhdir(dir)
# Returns the maximum message ID in the directory
sub max_mhdir
{
local $max = 1;
&opendir_as_mail_user(DIR, $_[0]) || &error("Failed to open $_[0] : $!");
foreach my $f (readdir(DIR)) {
$max = $f if ($f =~ /^\d+$/ && $f > $max);
}
closedir(DIR);
return $max;
}
# empty_mhdir(file)
# Delete all messages in an MH format directory
sub empty_mhdir
{
&opendir_as_mail_user(DIR, $_[0]) || &error("Failed to open $_[0] : $!");
foreach my $f (readdir(DIR)) {
unlink("$_[0]/$f") if ($f =~ /^\d+$/);
}
closedir(DIR);
}
# count_mhdir(file)
# Returns the number of messages in an MH directory
sub count_mhdir
{
&opendir_as_mail_user(DIR, $_[0]) || &error("Failed to open $_[0] : $!");
local @files = grep { /^\d+$/ } readdir(DIR);
closedir(DIR);
return scalar(@files);
}
# list_mbxfile(file, start, end)
# Return messages from an MBX format file
sub list_mbxfile
{
local @rv;
&open_as_mail_user(MBX, $_[0]) || &error("Failed to open $_[0] : $!");
seek(MBX, 2048, 0);
while(my $line = <MBX>) {
if ($line =~ m/( \d|\d\d)-(\w\w\w)-(\d\d\d\d) (\d\d):(\d\d):(\d\d) ([+-])(\d\d)(\d\d),(\d+);([[:xdigit:]]{8})([[:xdigit:]]{4})-([[:xdigit:]]{8})\r\n$/) {
my $size = $10;
my $mail = &read_mail_fh(MBX, $size, 0);
push(@rv, $mail);
}
}
close(MBX);
return @rv;
}
# select_mbxfile(file, &ids, headersonly)
# Returns a list of messages with the given indexes, from a MBX file
sub select_mbxfile
{
local ($file, $ids, $headersonly) = @_;
local @all = &list_mbxfile($file);
local @rv;
foreach my $i (@$ids) {
push(@rv, $all[$i]);
}
return @rv;
}
# read_mail_file(file, [headersonly])
# Read a single message from a file
sub read_mail_file
{
local (@headers, $mail);
# Open and read the mail file
&open_as_mail_user(MAIL, $_[0]) || return undef;
$mail = &read_mail_fh(MAIL, 0, $_[1]);
$mail->{'file'} = $_[0];
close(MAIL);
local @st = stat($_[0]);
$mail->{'size'} = $st[7];
$mail->{'time'} = $st[9];
# Set read flags based on the name
if ($_[0] =~ /:2,([A-Za-z]*)$/) {
local @flags = split(//, $1);
$mail->{'read'} = &indexoflc("S", @flags) >= 0 ? 1 : 0;
$mail->{'special'} = &indexoflc("F", @flags) >= 0 ? 1 : 0;
$mail->{'replied'} = &indexoflc("R", @flags) >= 0 ? 1 : 0;
$mail->{'flags'} = 1;
}
return $mail;
}
# read_mail_fh(handle, [end-mode], [headersonly])
# Reads an email message from the given file handle, either up to end of
# the file, or a From line. End mode 0 = EOF, 1 = From without -,
# 2 = From possibly with -,
# higher = number of bytes
sub read_mail_fh
{
local ($fh, $endmode, $headeronly) = @_;
local (@headers, $mail);
# Read the headers
local $lnum = 0;
while(1) {
$lnum++;
local $line = <$fh>;
$mail->{'size'} += length($line);
$line =~ s/\r|\n//g;
last if ($line eq '');
if ($line =~ /^(\S+):\s*(.*)/) {
push(@headers, [ $1, $2 ]);
$mail->{'rawheaders'} .= $line."\n";
}
elsif ($line =~ /^\s+(.*)/) {
$headers[$#headers]->[1] .= " ".$1 unless($#headers < 0);
$mail->{'rawheaders'} .= $line."\n";
}
elsif ($line =~ /^From\s+(\S+).*\d+/ &&
($1 ne '-' || $endmode == 2)) {
$mail->{'fromline'} = $line;
}
}
$mail->{'headers'} = \@headers;
foreach $h (@headers) {
$mail->{'header'}->{lc($h->[0])} = $h->[1];
}
if (!$headersonly) {
# Read the mail body
if ($endmode == 0) {
# Till EOF
my $bs = &get_buffer_size();
while(read($fh, $buf, $bs) > 0) {
$mail->{'size'} += length($buf);
$mail->{'body'} .= $buf;
$lc = ($buf =~ tr/\n/\n/);
$lnum += $lc;
}
close(MAIL);
}
elsif ($endmode > 2) {
# Till we have enough bytes
while($mail->{'size'} < $endmode) {
$line = <$fh>;
$lnum++;
$mail->{'size'} += length($line);
$mail->{'body'} .= $line;
}
}
else {
# Till next From line
while(1) {
$line = <$fh>;
last if (!$line || $line =~ /^From\s+(\S+).*\d+\r?\n/ &&
($1 ne '-' || $endmode == 2));
$lnum++;
$mail->{'size'} += length($line);
$mail->{'body'} .= $line;
}
}
$mail->{'lines'} = $lnum;
}
elsif ($endmode) {
# Not reading the body, but we still need to search till the next
# From: line in order to get the size
while(1) {
$line = <$fh>;
last if (!$line || $line =~ /^From\s+(\S+).*\d+\r?\n/ &&
($1 ne '-' || $endmode == 2));
$lnum++;
$mail->{'size'} += length($line);
}
$mail->{'lines'} = $lnum;
}
return $mail;
}
# dash_mode(user|file)
# Returns 1 if the messages in this folder are separated by lines like
# From - instead of the usual From foo@bar.com
sub dash_mode
{
&open_as_mail_user(DASH, &user_mail_file($_[0])) || return 0; # assume no
local $line = <DASH>;
close(DASH);
return $line =~ /^From\s+(\S+).*\d/ && $1 eq '-';
}
# mail_matches(&fields, andmode, &mail)
# Returns 1 if some message matches a search
sub mail_matches
{
local $count = 0;
local $f;
foreach $f (@{$_[0]}) {
local $field = $f->[0];
local $what = $f->[1];
local $neg = ($field =~ s/^\!//);
local $re = $f->[2] ? $what : "\Q$what\E";
if ($field eq 'body') {
$count++
if (!$neg && $_[2]->{'body'} =~ /$re/i ||
$neg && $_[2]->{'body'} !~ /$re/i);
}
elsif ($field eq 'size') {
$count++
if (!$neg && $_[2]->{'size'} > $what ||
$neg && $_[2]->{'size'} < $what);
}
elsif ($field eq 'headers') {
local $headers = $_[2]->{'rawheaders'} ||
join("", map { $_->[0].": ".$_->[1]."\n" }
@{$_[2]->{'headers'}});
$count++
if (!$neg && $headers =~ /$re/i ||
$neg && $headers !~ /$re/i);
}
elsif ($field eq 'all') {
local $headers = $_[2]->{'rawheaders'} ||
join("", map { $_->[0].": ".$_->[1]."\n" }
@{$_[2]->{'headers'}});
$count++
if (!$neg && ($_[2]->{'body'} =~ /$re/i ||
$headers =~ /$re/i) ||
$neg && ($_[2]->{'body'} !~ /$re/i &&
$headers !~ /$re/i));
}
elsif ($field eq 'status') {
$count++
if (!$neg && $_[2]->{$field} =~ /$re/i||
$neg && $_[2]->{$field} !~ /$re/i);
}
else {
$count++
if (!$neg && $_[2]->{'header'}->{$field} =~ /$re/i||
$neg && $_[2]->{'header'}->{$field} !~ /$re/i);
}
return 1 if ($count && !$_[1]);
}
return $count == scalar(@{$_[0]});
}
# search_fields(&fields)
# Returns an array of headers/fields from a search
sub search_fields
{
local @rv;
foreach my $f (@{$_[0]}) {
$f->[0] =~ /^\!?(.*)$/;
push(@rv, $1);
}
return &unique(@rv);
}
# matches_needs_body(&fields)
# Returns 1 if a search needs to check the mail body
sub matches_needs_body
{
foreach my $f (@{$_[0]}) {
return 1 if ($f->[0] eq 'body' || $f->[0] eq 'all');
}
return 0;
}
# parse_delivery_status(text)
# Returns the fields from a message/delivery-status attachment
sub parse_delivery_status
{
local @lines = split(/[\r\n]+/, $_[0]);
local (%rv, $l);
foreach $l (@lines) {
if ($l =~ /^(\S+):\s*(.*)/) {
$rv{lc($1)} = $2;
}
}
return \%rv;
}
# parse_mail_date(string)
# Converts a mail Date: header into a unix time
sub parse_mail_date
{
local ($str) = @_;
$str =~ s/^[, \t]+//;
$str =~ s/\s+$//;
open(OLDSTDERR, ">&STDERR"); # suppress STDERR from Time::Local
close(STDERR);
my $rv = eval {
if ($str =~ /^(\S+),\s+(\d+)\s+(\S+)\s+(\d+)\s+(\d+):\s?(\d+):\s?(\d+)\s+(\S+)/) {
# Format like Mon, 13 Dec 2004 14:40:41 +0100
# or Mon, 13 Dec 2004 14:18:16 GMT
# or Tue, 14 Sep 04 02:45:09 GMT
local $tm = timegm($7, $6, $5, $2, &month_to_number($3),
$4 < 50 ? $4+100 : $4 < 1000 ? $4 : $4-1900);
local $tz = $8;
if ($tz =~ /^(\-|\+)?\d+$/) {
local $tz = int($tz);
$tz = $tz/100 if ($tz >= 50 || $tz <= -50);
$tm -= $tz*60*60;
}
return $tm;
}
elsif ($str =~ /^(\S+),\s+(\d+),?\s+(\S+)\s+(\d+)\s+(\d+):\s?(\d+):\s?(\d+)/) {
# Format like Mon, 13 Dec 2004 14:40:41 or
# Mon, 13, Dec 2004 14:40:41
# No timezone, so assume local
local $tm = timelocal($7, $6, $5, $2, &month_to_number($3),
$4 < 50 ? $4+100 : $4 < 1000 ? $4 : $4-1900);
return $tm;
}
elsif ($str =~ /^(\S+)\s+(\S+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\d+)/) {
# Format like Tue Dec 7 12:58:52 2004
local $tm = timelocal($6, $5, $4, $3, &month_to_number($2),
$7 < 50 ? $7+100 : $7 < 1000 ? $7 : $7-1900);
return $tm;
}
elsif ($str =~ /^(\S+)\s+(\S+)\s+(\d{1,2})\s+(\d+):(\d+):(\d+)/ &&
&month_to_number($2)) {
# Format like Tue Dec 7 12:58:52
local @now = localtime(time());
local $tm = timelocal($6, $5, $4, $3, &month_to_number($2),
$now[5]);
return $tm;
}
elsif ($str =~ /^(\S+)\s+(\S+)\s+(\d{1,2})\s+(\d+):(\d+)$/ &&
defined(&month_to_number($2))) {
# Format like Tue Dec 7 12:58
local @now = localtime(time());
local $tm = timelocal(0, $5, $4, $3, &month_to_number($2),
$now[5]);
return $tm;
}
elsif ($str =~ /^(\S+)\s+(\d{1,2})\s+(\d+):(\d+)$/ &&
defined(&month_to_number($1))) {
# Format like Dec 7 12:58
local @now = localtime(time());
local $tm = timelocal(0, $4, $3, $2, &month_to_number($1),
$now[5]);
return $tm;
}
elsif ($str =~ /^(\S+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\d+)\s+(\S+)/) {
# Format like Dec 7 12:58:52 2004 GMT
local $tm = timegm($5, $4, $3, $2, &month_to_number($1),
$6 < 50 ? $6+100 : $6 < 1000 ? $6 : $6-1900);
local $tz = $7;
if ($tz =~ /^(\-|\+)?\d+$/) {
$tz = int($tz);
$tz = $tz/100 if ($tz >= 50 || $tz <= -50);
$tm -= $tz*60*60;
}
return $tm;
}
elsif ($str =~ /^(\d{4})\-(\d+)\-(\d+)\s+(\d+):(\d+)/) {
# Format like 2004-12-07 12:53
local $tm = timelocal(0, $4, $4, $3, $2-1,
$1 < 50 ? $1+100 : $1 < 1000 ? $1 : $1-1900);
return $tm;
}
elsif ($str =~ /^(\d+)\s+(\S+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\S+)/) {
# Format like 30 Jun 2005 21:01:01 -0000
local $tm = timegm($6, $5, $4, $1, &month_to_number($2),
$3 < 50 ? $3+100 : $3 < 1000 ? $3 : $3-1900);
local $tz = $7;
if ($tz =~ /^(\-|\+)?\d+$/) {
$tz = int($tz);
$tz = $tz/100 if ($tz >= 50 || $tz <= -50);
$tm -= $tz*60*60;
}
return $tm;
}
elsif ($str =~ /^(\d+)\/(\S+)\/(\d+)\s+(\d+):(\d+)/) {
# Format like 21/Feb/2008 24:13
local $tm = timelocal(0, $5, $4, $1, &month_to_number($2),
$3-1900);
return $tm;
}
else {
return undef;
}
};
open(STDERR, ">&OLDSTDERR");
close(OLDSTDERR);
if ($@) {
#print STDERR "parsing of $str failed : $@\n";
return undef;
}
return $rv;
}
# send_text_mail(from, to, cc, subject, body, [smtp-server])
# A convenience function for sending a email with just a text body
sub send_text_mail
{
local ($from, $to, $cc, $subject, $body, $smtp) = @_;
local $cs = &get_charset();
local $attach =
{ 'headers' => [ [ 'Content-Type', 'text/plain; charset='.$cs ],
[ 'Content-Transfer-Encoding', 'quoted-printable' ] ],
'data' => "ed_encode($body) };
local $mail = { 'headers' =>
[ [ 'From', $from ],
[ 'To', $to ],
[ 'Cc', $cc ],
[ 'Subject', &encode_mimewords($subject) ] ],
'attach' => [ $attach ] };
return &send_mail($mail, undef, 1, 0, $smtp);
}
# make_from_line(address, [time])
# Returns a From line for mbox emails, based on the current time
sub make_from_line
{
local ($addr, $t) = @_;
$t ||= time();
&clear_time_locale();
local $rv = "From $addr ".strftime("%a %b %e %H:%M:%S %Y", localtime($t));
&reset_time_locale();
return $rv;
}
sub notes_decode
{
# Deprecated - does nothing
}
# add_mailer_ip_headers(&headers)
# Add X-Mailer and X-Originating-IP headers, if enabled
sub add_mailer_ip_headers
{
local ($headers) = @_;
if (!$config{'no_orig_ip'}) {
push(@$headers, [ 'X-Originating-IP', $ENV{'REMOTE_ADDR'} ]);
}
if (!$config{'no_mailer'}) {
push(@$headers, [ 'X-Mailer', ucfirst(&get_product_name())." ".
&get_webmin_version() ]);
}
}
# set_mail_open_user(user)
# Sets the Unix user that will be used for all mail file open ops, by functions
# like list_mail and select_maildir
sub set_mail_open_user
{
my ($user) = @_;
if ($user eq "root" || $user eq "0") {
$main::mail_open_user = undef;
}
elsif (!$<) {
$main::mail_open_user = $user;
}
}
# clear_mail_open_user()
# Resets the user to root
sub clear_mail_open_user
{
my ($user) = @_;
$main::mail_open_user = undef;
}
# open_as_mail_user(fh, file)
# Calls the open function, but as the user set by set_mail_open_user
sub open_as_mail_user
{
my ($fh, $file) = @_;
my $switched = &switch_to_mail_user();
my $mode = "<";
if ($file =~ s/^(<|>>|>|\|)//) {
$mode = $1;
}
my $rv = open($fh, $mode, $file);
if ($switched) {
# Now that it is open, switch back to root
$) = 0;
$> = 0;
}
return $rv;
}
# create_as_mail_user(fh, file)
# Creates a new file, but ensures that it does not yet exist first, and then
# sets the ownership to the mail user
sub create_as_mail_user
{
my ($fh, $file) = @_;
if (&should_switch_to_mail_user()) {
# Open the file as root, but ensure that it doesn't exist yet. Then
# make it owned by the user
$file =~ s/^>+//;
my $rv = sysopen($fh, $file, O_CREAT|O_WRONLY, 0700);
return $rv if (!$rv);
my @uinfo = &get_switch_user_info();
&set_ownership_permissions($uinfo[2], $uinfo[3], undef, $file);
return $rv;
}
else {
# Operating as root, so no special behaviour needed
if ($file =~ /^(<|>)/) {
return open($fh, $file);
}
else {
return open($fh, "<", $file);
}
}
}
# opendir_as_mail_user(fh, dir)
# Calls the opendir function, but as the user set by set_mail_open_user
sub opendir_as_mail_user
{
my ($fh, $dir) = @_;
my $switched = &switch_to_mail_user();
my $rv = opendir($fh, $dir);
if ($switched) {
$) = 0;
$> = 0;
}
return $rv;
}
# rename_as_mail_user(old, new)
# Like the rename function, but as the user set by set_mail_open_user
sub rename_as_mail_user
{
my ($oldfile, $newfile) = @_;
my $switched = &switch_to_mail_user();
my $rv = &rename_file($oldfile, $newfile);
if ($switched) {
$) = 0;
$> = 0;
}
return $rv;
}
# mkdir_as_mail_user(path, perms)
# Like the mkdir function, but as the user set by set_mail_open_user
sub mkdir_as_mail_user
{
my ($path, $perms) = @_;
my $switched = &switch_to_mail_user();
my $rv = mkdir($path, $perms);
if ($switched) {
$) = 0;
$> = 0;
}
return $rv;
}
# unlink_as_mail_user(path)
# Like the unlink function, but as the user set by set_mail_open_user
sub unlink_as_mail_user
{
my ($path) = @_;
my $switched = &switch_to_mail_user();
my $rv = unlink($path);
if ($switched) {
$) = 0;
$> = 0;
}
return $rv;
}
# copy_source_dest_as_mail_user(source, dest)
# Copy a file, with perms of the user from set_mail_open_user
sub copy_source_dest_as_mail_user
{
my ($src, $dst) = @_;
if (&should_switch_to_mail_user()) {
&open_as_mail_user(SRC, $src) || return 0;
&open_as_mail_user(DST, ">$dst") || return 0;
my $buf;
my $bs = &get_buffer_size();
while(read(SRC, $buf, $bs) > 0) {
print DST $buf;
}
close(SRC);
close(DST);
return 1;
}
else {
return ©_source_dest($src, $dst);
}
}
# chmod_as_mail_user(perms, file, ...)
# Set file permissions, but with perms of the user from set_mail_open_user
sub chmod_as_mail_user
{
my ($perms, @files) = @_;
my $switched = &switch_to_mail_user();
my $rv = chmod($perms, @files);
if ($switched) {
$) = 0;
$> = 0;
}
return $rv;
}
# should_switch_to_mail_user()
# Returns 1 if file IO will be done as a mail owner user
sub should_switch_to_mail_user
{
return defined($main::mail_open_user) && !$< && !$>;
}
# switch_to_mail_user()
# Sets the permissions used for reading files
sub switch_to_mail_user
{
if (&should_switch_to_mail_user()) {
# Switch file permissions to the correct user
my @uinfo = &get_switch_user_info();
@uinfo || &error("Mail open user $main::mail_open_user ".
"does not exist");
$) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($uinfo[0]));
$> = $uinfo[2];
return 1;
}
return 0;
}
# get_switch_user_info()
# Returns the getpw* function array for the user to switch to
sub get_switch_user_info
{
if ($main::mail_open_user =~ /^\d+$/) {
# Could be by UID .. but fall back to by name if there is no such UID
my @rv = getpwuid($main::mail_open_user);
return @rv if (@rv > 0);
}
return getpwnam($main::mail_open_user);
}
# is_ascii()
# Checks if string is ASCII
sub is_ascii {
my ($str) = @_;
my $str_ = $str;
utf8::encode($str_);
if ($str eq $str_) {
return 1;
}
else {
return 0;
}
}
1;