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# SPDX-License-Identifier: GPL-2.0-or-later package Amavis::Boot; use strict; use re 'taint'; use Errno qw(ENOENT EACCES); # replacement for a 'require' with a more informative error handling #sub my_require($) { # my $filename = $_[0]; # my $result; # if (exists $INC{$filename} && !$INC{$filename}) { # die "Compilation failed in require\n"; # } elsif (exists $INC{$filename}) { # $result = 1; # already loaded # } else { # my $found = 0; # for my $prefix (@INC) { # my $full_fname = "$prefix/$filename"; # my(@stat_list) = stat($full_fname); # symlinks-friendly # my $errn = @stat_list ? 0 : 0+$!; # if ($errn != ENOENT) { # $found = 1; # $INC{$filename} = $full_fname; # my $owner_uid = $stat_list[4]; # my $msg; # if ($errn) { $msg = "is inaccessible: $!" } # elsif (-d _) { $msg = "is a directory" } # elsif (!-f _) { $msg = "is not a regular file" } # elsif ($> && -o _) { $msg = "should not be owned by EUID $>" } # elsif ($> && -w _) { $msg = "is writable by EUID $>, EGID $)" } # elsif ($owner_uid) { $msg = "should be owned by root (uid 0) "} # !defined($msg) or die "Requiring $full_fname, file $msg,\n"; # $! = 0; # $result = do $full_fname; # if (!defined($result) && $@ ne '') { # undef $INC{$filename}; chomp($@); # die "Error in file $full_fname: $@\n"; # } elsif (!defined($result) && $! != 0) { # undef $INC{$filename}; # die "Error reading file $full_fname: $!\n"; # } elsif (!$result) { # undef $INC{$filename}; # die "Module $full_fname did not return a true value\n"; # } # last; # } # } # die sprintf("my_require: Can't locate %s in \@INC (\@INC contains: %s)\n", # $filename, join(' ',@INC)) if !$found; # } # $result; #} # Fetch all required modules (or nicely report missing ones), and compile them # once-and-for-all at the parent process, so that forked children can inherit # and share already compiled code in memory. Children will still need to 'use' # modules if they want to inherit from their name space. # sub fetch_modules($$@) { my($reason, $required, @modules) = @_; my(@missing); for my $m (@modules) { if (ref $m eq 'ARRAY') { # interpret as alternatives my $missing = fetch_modules($reason, 0, @$m); if (@$missing == @$m) { local $" = ' | '; push @missing, "(@$missing)"; } next } local $_ = $m; $_ .= /^auto::/ ? '.al' : '.pm' if !m{^/} && !m{\.(?:pm|pl|al|ix)\z}; s{::}{/}g; eval { require $_; # my_require $_; # more informative on err, but some problems reported } or do { my $eval_stat = $@ ne '' ? $@ : "errno=$!"; chomp $eval_stat; push(@missing,$m); $eval_stat =~ s/^/ /gms; # indent printf STDERR ("fetch_modules: error loading %s module %s:\n%s\n", $required ? 'required' : 'optional', $_, $eval_stat) if $eval_stat !~ /\bCan't locate \Q$_\E in \@INC\b/; }; } die "ERROR: MISSING $reason:\n" . join('', map(" $_\n", @missing)) if $required && @missing; \@missing; } BEGIN { if ($] <= 5.008) { # deal with a glob() taint bug (perl 5.6.1, 5.8.0) fetch_modules('REQUIRED BASIC MODULES', 1, qw(File::Glob)); File::Glob->import(':globally'); # use the same module as Perl 5.8 uses } fetch_modules('REQUIRED BASIC MODULES', 1, qw( Exporter POSIX Fcntl Socket Errno Carp Time::HiRes IO::Handle IO::File IO::Socket IO::Socket::UNIX Digest::MD5 Unix::Syslog File::Basename Compress::Zlib MIME::Base64 MIME::QuotedPrint MIME::Words MIME::Head MIME::Body MIME::Entity MIME::Parser MIME::Decoder MIME::Decoder::Base64 MIME::Decoder::Binary MIME::Decoder::QuotedPrint MIME::Decoder::NBit MIME::Decoder::UU MIME::Decoder::Gzip64 Net::Server Net::Server::PreFork ), [qw[Net::LibIDN2 Net::LibIDN]]); # with earlier versions of Perl one may need to add additional modules # to the list, such as: auto::POSIX::setgid auto::POSIX::setuid ... fetch_modules('OPTIONAL BASIC MODULES', 0, qw( PerlIO PerlIO::scalar Unix::Getrusage Carp::Heavy auto::POSIX::setgid auto::POSIX::setuid auto::POSIX::SigAction::new auto::POSIX::SigAction::safe MIME::Decoder::BinHex )); 1; } 1;